Polycarbonate (PC) homopolymer granules for optical and sheet conversion are amorphous thermoplastics synthesized from bisphenol A either by interfacial phosgenation or by melt transesterification with diphenyl carbonate. The glass transition temperature is near 147 °C, and the refractive index measured on a transparent plaque is 1.585 under ASTM D542-14. Optical...
The UL Yellow Card for a flame-retardant polycarbonate compound is the primary public-facing quality document that establishes flammability classification under UL 94. A V-0 listing at 1.5 mm thickness, identified on the Yellow Card under a file number assigned by UL LLC, conveys that a specific formulation has met vertical...
What Lexan Means Today: A PC Trade Name That Became Generic The designation Lexan is not a formal material grade under ISO 21305-1:2019 but a trade name owned by SABIC. In many procurement documents, maintenance manuals, and verbal specifications, “Lexan” is used as a shorthand for any transparent, impact-resistant bisphenol...
Polycarbonate (PC) is an amorphous thermoplastic produced by interfacial phosgenation of bisphenol A or by melt transesterification with diphenyl carbonate. Lexan is a registered trademark of SABIC Global Technologies B.V.; it designates a specific family of polycarbonate resins, extruded sheets, films and compounded materials, not a generic polymer class. A...
Makrolon Material: Reading the Polycarbonate Four-Digit System, 2205 to 6557 requires the reader to treat the grade code as a controlled vocabulary, not a material data sheet. Polycarbonate (PC) is an amorphous thermoplastic formed by the reaction of bisphenol A with carbonyl chloride or diphenyl carbonate; its glass transition temperature...
PC/ABS Alloy or Straight Polycarbonate? A Cost, Flow and Weathering Comparison Evaluating straight polycarbonate against a PC/ABS alloy requires moving beyond single-point data sheets. On production injection moulding lines, the comparison is resolved through melt rheology at the operating shear rate, part mass derived from density, and long-term weathering response...
Polycarbonate (PC) is an amorphous engineering thermoplastic whose bisphenol A carbonate backbone gives a glass transition temperature of approximately 147 °C and saturated water uptake of 0.15–0.35% by mass per ASTM D570-98. In fused filament fabrication, the material sits inside a narrow processing band. The melt must be hot enough...
Designing With Polycarbonate: Wall Thickness, Ribs and the Stress You Cannot See Designing with polycarbonate wall thickness, ribs and the stress you cannot see begins with an amorphous polymer whose tensile modulus falls between 2350 MPa and 2450 MPa and whose notched Izod impact at 23°C is commonly reported between...
Sourcing Polycarbonate Sheet: A Buyer's Checklist Before the First Order Polycarbonate (PC) sheet is an amorphous thermoplastic with a density of 1.20 g/cm³ under ISO 1183-1:2019, total luminous transmittance of 88–91% at 3 mm under ASTM D1003-13, and notched Izod impact values above 600 J/m under ASTM D256-10. The continuous...
What Drives the Polycarbonate Sheet Price: Resin, UV Layer, Freight and FX Polycarbonate (PC) sheet is an amorphous engineering thermoplastic produced by single-screw or twin-screw extrusion from bisphenol-A-based polycarbonate resin. Clear monolithic sheet typically exhibits a density of 1.19–1.21 g/cm³ per ISO 1183-1:2019, tensile yield strength of 60–70 MPa per...
Architectural and industrial polycarbonate (PC) sheet is manufactured from bisphenol A polycarbonate with a density of 1.20 g/cm³ determined per ISO 1183-1:2019, a glass transition temperature near 145 °C by ISO 306, and a solid-state thermal conductivity of approximately 0.20 W/(m·K) measured in accordance with ISO 8302:2018 or ASTM C518-21....
Twin-Wall vs Triple-Wall Polycarbonate: What the Extra Layer Actually Buys Polycarbonate multiwall sheet is extruded from linear bisphenol-A polycarbonate resin with a melt mass-flow rate typically between 6 g/10 min and 10 g/10 min at 300 °C under 1.2 kg load according to ISO 1133-1:2022. Production lines for twin-wall and...
When Polycarbonate Is the Wrong Lens Choice: Thickness and Prescription Limits Ophthalmic-grade polycarbonate is a thermoplastic resin with nominal refractive index 1.586, Abbe number 30, and density 1.20 g/cm³. It is specified for safety and pediatric eyewear because of its high impact resistance, but the same optical constants produce thicker...
Brand Premium on Polycarbonate Sheet: What Lexan and Makrolon Cost Extra Brand premium on polycarbonate sheet: what Lexan and Makrolon cost extra is a procurement calculation separating bulk polymer price from downstream conversion risk. Polycarbonate (PC) sheet is manufactured from bisphenol A polycarbonate resin through flat-die extrusion, polished roll-stack cooling,...
Equivalent Polycarbonate Grades: Substituting Lexan and Makrolon by Property begins with the fact that both commercial families are bisphenol-A-based polycarbonate, but the substitution itself must be validated against a property matrix rather than a brand name. The comparison protocol for unfilled transparent grades typically includes ISO 1133-1 for melt volume-flow...
Makrolon Polycarbonate Grades: MOQ, Lead Time and the Sub-Grade Trap Specifying Makrolon polycarbonate across a supply chain involves more than selecting a melt volume-flow rate from a datasheet. Prime unfilled grades such as Makrolon 2405, Makrolon 2805, and Makrolon 3105 differ in MVR under ISO 1133-1:2022 at 300 °C/1.2 kg,...
Polycarbonate (PC) and Polycarbonate/ABS Grades by Application: Interior, Enclosure and Electroplating Polycarbonate (PC) is an amorphous engineering thermoplastic derived from bisphenol-A and phosgene or diphenyl carbonate. The polymer backbone contains carbonate linkages that produce a glass transition temperature near 147°C and a notched Izod impact value commonly exceeding 600 J/m...
Matching Polycarbonate Sheet Structure to Roof Pitch, Span and Snow Load Matching Polycarbonate Sheet Structure to Roof Pitch, Span and Snow Load requires simultaneous evaluation of cross-sectional geometry, support spacing, drainage slope, thermal movement, and the factored snow pressure acting on the glazing. A multiwall sheet that meets a uniform-load...
Polycarbonate (PC) corrugated sheet is specified where impact resistance, dimensional stability, and visible light transmission must be maintained in a lightweight, single-skin roof envelope subject to thermal cycling and moderate hail. The product examined here, Suntuf Corrugated Polycarbonate: Wave Profiles and Which Roof They Suit, is a low-rib corrugated sheet...
Tuffak Polycarbonate Sheet: The Food-Grade Board in North American Retail is a flat extruded bisphenol-A polycarbonate derived from 2,2-bis(4-hydroxyphenyl)propane and a carbonate ester. The sheet is amorphous, transparent, and stocked in thicknesses from 2.0 mm through 12.7 mm for food display boards, sneeze guards, and retail case dividers. Compliance with...
Bisphenol-A polycarbonate produced by interfacial phosgenation of 2,2-bis(4-hydroxyphenyl)propane and by melt transesterification with diphenyl carbonate enters global supply chains under two principal trade names. The technical comparison summarized as “Makrolon vs Lexan: Two Polycarbonate Trade Names, Two Continents, One Polymer” is, at the polymer-backbone level, a comparison of identical bisphenol-A...
Polycarbonate for Greenhouses: U-Value, Light Transmission and Ten-Year Decay is evaluated as three linked engineering parameters rather than a single material property. The thermal performance of a greenhouse roof or sidewall is expressed as a U-value in watts per square metre per kelvin. The optical performance is defined by total...
The Processing Engineer's Polycarbonate Start-Up Sheet: Dryer, Barrel, First-Off Polycarbonate (PC) is processed as a bisphenol-A-derived amorphous thermoplastic with a glass transition temperature near 147 °C measured by ISO 11357-2:2020. Start-up reliability for injection moulding and extrusion is governed by three sequential controls: closed-loop desiccant drying to a residual moisture...
Polycarbonate (PC) roofing is produced as solid flat sheet, corrugated sheet, trapezoidal profile and multiwall cellular sheet from bisphenol A polycarbonate resin. On a production-scale twin-screw extrusion line, melt temperature is maintained between 270 °C and 310 °C, and resin must be dried to a moisture content below 0.02% before...
Polycarbonate Sheet: How One Extruded Board Became Seven Different Products A single extruded polycarbonate (PC) board manufactured from bisphenol A polycarbonate resin is converted into at least seven service-specific articles through machining, thermoforming, cold forming, lamination, coating, and additive compounding. The base board is produced from resin with a melt...
Polycarbonate (PC) thickness specification is governed by the interaction between short-term mechanical load, long-term weathering, secondary fabrication stress, and the dimensional tolerance of the delivered sheet or molded part. Solid extruded PC sheet is commercially produced from 0.5–20 mm in standard grades, while multiwall, laminated, and bullet-resistant constructions extend the...
Polycarbonate Sheet Forms at a Glance: Solid, Twin-Wall, Corrugated and Film. Polycarbonate (PC) sheet formats originate from the same bisphenol A-based amorphous polymer with a density of 1.20 g/cm³ per ISO 1183-1 and a glass transition temperature near 147 °C per ISO 11357-2. The commercial formats—solid, twin-wall, corrugated, and film—differ...
Polycarbonate Sheet Sizes Decoded: 4x8, 2.1 m Rolls and What Suppliers Stock is a dimensional and conversion question that precedes CNC routing, thermoforming, and architectural glazing. Extruded solid polycarbonate (PC) reaches distribution in two primary supply states: cut panels and spiral-wound roll stock. The 4x8 panel—nominal 1219 mm × 2438...
Polycarbonate (PC) sheet subjected to outdoor weathering undergoes photochemical degradation initiated primarily by near-UV radiation between 290 nm and 350 nm. The carbonate linkage participates in photo-Fries rearrangement and chain scission; the observable responses are yellowing, gloss loss, microcracking, and retention loss in notched Izod impact measured by ASTM D256-23...
Acrylic vs Polycarbonate Sheet: Impact, Clarity, Weathering and Price Side by Side Polycarbonate (PC) sheet is an amorphous engineering thermoplastic produced from bisphenol A through interfacial phosgenation or melt transesterification with diphenyl carbonate. Poly(methyl methacrylate) (PMMA), commonly referred to as acrylic, is a methacrylate ester homopolymer available in cell-cast and...
Polycarbonate (PC) is an amorphous engineering thermoplastic synthesized by interfacial or melt-phase condensation of bisphenol A and a carbonate source. Its unfilled density is 1.20 g/cm³ per ISO 1183-1, compared with 2.50 g/cm³ for soda-lime float glass. The mass per unit area of a 3 mm sheet is therefore 3.6...
Bisphenol A polycarbonate (PC) is synthesized via interfacial phosgenation of bisphenol A or by melt transesterification with diphenyl carbonate. Melt transesterification proceeds under vacuum at 280–320 °C with a carbonate exchange catalyst; the resulting optical-grade resin typically has weight-average molecular weight in the 40,000–60,000 Da range and melt volume-flow rate...
Polycarbonate (PC) derived from bisphenol A and diphenyl carbonate is an amorphous engineering thermoplastic with a glass transition temperature of approximately 147°C, visible-light transmittance of about 89% at 3 mm thickness under ISO 13468-1, tensile stress at yield in the 60–65 MPa range, tensile modulus near 2350 MPa, and notched...
Makrolon Polycarbonate Viscosity Bands: Matching a Code to a Job Polycarbonate (PC) is an amorphous thermoplastic whose melt viscosity is governed primarily by weight-average molecular weight and molecular weight distribution. In Makrolon nomenclature, the numerical viscosity code corresponds to melt volume-flow rate (MVR) determined at 300 °C under 1.2 kg...
Bisphenol-A polycarbonate (PC) is an amorphous engineering thermoplastic produced by interfacial polycondensation of bisphenol-A with phosgene or by melt-phase carbonate interchange. The carbonate linkage in the backbone provides high optical clarity and impact resistance but imposes a narrow drying envelope before sheet extrusion and thermoforming. Unfilled PC typically exhibits a...
Polycarbonate (PC) film is produced by flat-die melt extrusion of bisphenol-A polycarbonate resin, followed by polishing, texturing, or coating. The amorphous structure yields a refractive index of 1.584–1.586 at 589 nm, a glass transition temperature of 147–150°C, and no crystalline melting point. Commercial film used for optical, in-mold electronics, and...
Birefringence in Polycarbonate Optics: Reading the Stress Pattern is a photoelastic measurement discipline rather than a visual inspection. Polycarbonate (PC) is an amorphous thermoplastic with a refractive index nD = 1.584–1.586 per ASTM D542-14, luminous transmittance of 89–91 % at 3 mm thickness per ASTM D1003-21, and a glass transition...
Optical polycarbonate (PC) is an amorphous bisphenol A-based engineering thermoplastic, produced commercially by interfacial polycondensation or carbonate melt transesterification. Since the resin solidifies without spherulitic crystallites, unfilled grades exhibit no large-angle bulk scattering in the visible spectrum. Specification of optical-grade PC, however, is not a single measurement; it requires simultaneous...
Polycarbonate resin packaging: 25 kg bags, octabins and bulk trucks constitutes the central logistics boundary between polycondensation plant and melt-processing line for bisphenol-A polycarbonate. The chosen packaging format determines incoming moisture state, particle attrition, foreign-particulate ingress, and lot-level traceability. Polycarbonate pellets are hygroscopic; at melt temperatures above 300 °C, pellet...
Polycarbonate rod and block machining stock is supplied in extruded or compression-molded formats with sizes that are not governed by a single ISO product standard. The commercial window in converter catalogues extends from approximately 6 mm to 250 mm diameter for rod, and from 5 mm to 100 mm thickness...
Polycarbonate sheet procurement carries an often-underreported yield factor: the difference between the purchased rectangular slab and the usable envelope after subtractive cutting. Material density for unfilled polycarbonate is 1.20 g/cm³ when measured under ISO 1183-1:2019. For a standard format of 2,050 mm × 3,050 mm, a 3 mm sheet corresponds...
Polycarbonate Sheet Size Chart: Thickness, Panel Size and Tolerances in One Table Extruded polycarbonate sheet is specified in procurement documentation by nominal thickness, mill panel dimensions, and the permitted deviation from those values. The consolidated table below aligns representative thickness tolerances, standard panel sizes, and cut-to-size length/width tolerances in one...
Polycarbonate (PC) sheet is an amorphous thermoplastic produced from bisphenol A and a carbonate precursor. Clear 3.0 mm solid PC sheet typically exhibits luminous transmittance of 88–91% per ASTM D1003 and notched Izod impact strength above 60 kJ/m² per ISO 180/1A. Those values describe the mechanical baseline, but they do...
Polycarbonate (PC) is synthesised from bisphenol A (BPA; CAS 80-05-7) and diphenyl carbonate via melt transesterification, or from BPA and phosgene via interfacial polymerisation. The reacted BPA unit is a 4,4′-(propane-2,2-diyl)diphenyl carbonate moiety; the regulatory focus is on free BPA monomer remaining from incomplete polymerisation or regenerated by hydrolysis and...
Cutting Polycarbonate Sheet: Saw Blades, Speeds and the Melting Trap Polycarbonate (PC) is an amorphous bisphenol-A polycarbonate with a glass transition temperature of approximately 147 °C (ISO 11357-2) and no true melting point. Its thermal conductivity is approximately 0.20 W·m⁻¹·K⁻¹ (ASTM C177), and its heat deflection temperature under a load...
Flame-retardant polycarbonate (PC) compounds selected for electrical power-distribution housings, photovoltaic junction enclosures, and battery-management modules are routinely specified by UL 94 classification. However, a material is not simply V-0 or 5VA; each classification belongs to a specific specimen thickness, colour, preconditioning sequence, and flammability test configuration. The specification “Flame-Retardant Polycarbonate:...
Polycarbonate (PC) is an amorphous bisphenol-A-based engineering thermoplastic with density 1.20 g/cm³ (ISO 1183-1), glass transition temperature approximately 147 °C (ISO 11357-2), tensile stress at yield 60–70 MPa (ISO 527-2), tensile modulus 2.2–2.4 GPa, and notched Izod impact strength above 600 J/m (ASTM D256) for 3.2 mm specimens. These properties...
Injection Moulding Polycarbonate: Drying, Melt Viscosity and the Cycle That Holds Polycarbonate (PC) is an amorphous condensation polymer with a glass transition temperature near 147°C and a practical melt-processing band of 280°C to 320°C. On injection moulding lines the interaction between residual pellet moisture, melt viscosity and the pack/hold segment...
Polycarbonate (PC) luggage shells are differentiated from acrylonitrile-butadiene-styrene (ABS) shells by measurable differences in tensile response, multiaxial impact energy absorption, melt processing requirements, and chemical compatibility. Published data sheets for unfilled polycarbonate homopolymer typically report tensile yield strength in the range of 60–70 MPa under ASTM D638-14, while a general-purpose...
Polycarbonate (PC) homopolymer has historically held a specification position in transparent machine guards, electrical enclosures, and medical device housings because its dry-as-molded tensile yield, notched Izod impact, and heat deflection temperature provide a wide processing envelope. After regional spot resin prices doubled, the phrase `Resin Prices Doubled: A Polycarbonate-to-PC/ABS Downgrade...
Specification-grade polycarbonate (PC) is an amorphous aromatic engineering thermoplastic produced from bisphenol A and a carbonyl source. Density measured by ISO 1183-1 is typically 1.19–1.21 g/cm³. Transparent unfilled grades exhibit light transmission of 88–90% at 3.0 mm thickness when tested to ASTM D1003. The material is supplied as cylindrical pellets...
The operative procurement pattern is small orders and cut-to-size: getting six polycarbonate sheets, not a pallet, changes inspection, packaging, and edge-quality responsibility. A low-volume order typically starts from a master sheet size of 48 in × 96 in, 48 in × 120 in, or 60 in × 120 in, with...
Why Two Polycarbonate Sheet Quotes Differ by 40 Percent A 40 percent difference between two quotations for polycarbonate sheet can be generated by a single specification variable: UV-cap coextrusion, fire certification, resin grade, thickness tolerance, or optical inspection. The spread is not necessarily evidence of supplier overpricing. Two offerings that...
Contract or Spot? Buying Polycarbonate Under Volatile Resin Prices Polycarbonate purchasing under volatile resin prices is a transfer of feedstock price risk between the buyer and the supplier. PC homopolymer is produced commercially by interfacial polymerization of bisphenol-A with phosgene or by melt transesterification of bisphenol-A with diphenyl carbonate. Bisphenol-A...
Specifying Polycarbonate Glazing: Span Tables, Deflection and Thermal Movement Specifying polycarbonate glazing requires coordinated evaluation of short-term deflection, long-term creep, and reversible thermal expansion. Unlike glass, solid and multiwall PC sheets have a relatively low flexural modulus of approximately 2300 MPa when measured to ASTM D790-17 and a linear coefficient...
Polycarbonate (PC) is an amorphous thermoplastic produced by the interfacial condensation of bisphenol A with phosgene or by melt transesterification. The carbonate linkage in the backbone is responsible for the combination of high transparency, high impact resistance, and notch sensitivity. Typical unfilled polycarbonate exhibits density 1.20 g/cm³ under ISO 1183-1:2019,...
Polycarbonate (PC) is an amorphous thermoplastic with a glass transition temperature of 145–150 °C, tensile yield stress of 60–70 MPa under ASTM D638-14, and notched Izod impact energy commonly reported between 600 and 900 J/m at 3.2 mm thickness under ASTM D256. Those values support structural enclosures, transparent guards, and...
Bisphenol-A polycarbonate (PC) is specified for the majority of impact-rated plano safety lenses because its high-speed puncture resistance substantially exceeds that of allyl diglycol carbonate, commonly designated CR-39. Injection-moulded PC lenses exhibit notched Izod impact values in the range of 600 J/m to 850 J/m under ASTM D256-10, whereas CR-39...
Polycarbonate Lenses in Practice: Thickness, Coatings and Edge Finishing Polycarbonate (PC) is an amorphous engineering thermoplastic with a density of 1.20 g/cm³, a refractive index of 1.586 at 589 nm, and an Abbe number of approximately 30. In lens manufacturing, the resin is selected for impact resistance rather than optical...
Reading the Polycarbonate Market: BPA Feedstock, Capacity and the Price Cycle Polycarbonate (PC) is an amorphous thermoplastic with a glass transition temperature near 147 °C measured by differential scanning calorimetry under ISO 11357-2:2020 at 10 K/min and a density of 1.20 g/cm³ under ISO 1183-1:2019. The polymer is processed as...
Cold bending vs heat bending polycarbonate: minimum radius and hard limits are governed by outer-fiber strain, sheet surface quality, temperature, moisture, and grade formulation rather than by short-term flexural strength alone. Polycarbonate is an amorphous thermoplastic with a glass transition temperature of 145–150 °C when measured by ISO 11357-2:2020, tensile...
Polycarbonate (PC) is an amorphous thermoplastic synthesised by interfacial polymerisation of bisphenol A (BPA) with phosgene, or by melt transesterification of BPA with diphenyl carbonate. The repeat unit contains carbonate linkages that provide optical clarity, impact strength, and heat resistance. For unfilled injection-moulding grades, density is 1.20 g/cm³ under ISO...
Laser Cutting Polycarbonate: Why It Is Possible and Usually Still Wrong The carbonate repeat unit in bisphenol-A polycarbonate has intrinsic absorption at 10.6 µm strong enough for a 60–150 W sealed CO₂ laser to pierce and traverse a 3 mm sheet. The process is therefore physically possible. It is normally...
Halogen-Free Flame-Retardant Polycarbonate: What It Costs in Clarity Unfilled optical-grade polycarbonate (PC) is specified for transparent electrical-equipment covers on the basis of luminous transmittance of 88–91% at 3.0 mm wall thickness and haze below 1.0% under ASTM D1003-13. Halogen-free flame-retardant packages alter this optical baseline through refractive index mismatch, additive...
Polycarbonate (PC) is an amorphous thermoplastic whose unfilled fracture behavior under ASTM D256-10 is usually ductile: notched Izod values from 600 to 850 J/m and tensile elongation at break above 80 % under ISO 527-2:2012. The addition of chopped E-glass fiber raises tensile modulus and heat deflection temperature but suppresses...
Polycarbonate Sealants Compared: Neutral-Cure Silicone, PU and What to Never Use Polycarbonate (PC) sheet and molded components are produced from bisphenol-A-derived aromatic polycarbonate resin. Unfilled grades typically exhibit a glass transition temperature near 147 °C, tensile stress at yield in the range of 55–65 MPa under ISO 527-1:2019, flexural modulus...
The question expressed as “Why a 10 mm Polycarbonate Panel Is Not Four Times Stiffer Than a 5 mm One” can be answered through the flexural rigidity relationship for solid polycarbonate (PC) sheet. Bending stiffness is not a direct function of thickness in the way that mass per unit area...
Polycarbonate (PC) is an amorphous engineering thermoplastic produced by polycondensation of bisphenol A with diphenyl carbonate or phosgene. The carbonate backbone provides optical clarity, high dry-ambient impact strength, and heat resistance sufficient for repeated hot-water contact. Those same carbonate linkages are susceptible to hydrolysis, which regenerates bisphenol A and carbon...
Recycled Polycarbonate: Mechanical, Chemical and the BPA Question Behind Both constitutes the critical evaluation pathway for polycarbonate (PC) feedstocks recovered from post-industrial and post-consumer streams. Post-industrial PC granulate from optical disc rejections, sheet trim, and water cooler bottle preforms carries a narrow molar mass distribution and predictable rheology, whereas post-consumer...
Buying recycled polycarbonate: PCR content claims and how to verify them requires treating a supplier declaration as a chain-of-custody data set rather than as a material-grade property. Polycarbonate (PC) is a bisphenol-A–based engineering thermoplastic with a glass transition temperature near 147 °C when measured by differential scanning calorimetry per ISO...
Reading the Warranty on UV-Protected Polycarbonate: Exclusions Buyers Miss requires a clause-by-clause comparison against the material’s weathering chemistry, fabrication history, and installation boundary conditions. The document is not a general promise of UV stability for polycarbonate (PC); it is a technical schedule that excludes specific exposure conditions, cleaning agents, fabrication...
Is Polycarbonate Toxic? Separating the Monomer, the Polymer and the Migrant requires a division of the question into free bisphenol A (BPA) monomer, the aromatic polycarbonate macromolecule, and the low-molecular-mass species that move from a finished article into food, water, or biological fluid. Polycarbonate is synthesised by condensation of BPA...
Choosing Polycarbonate for an Optical Part: Abbe Number, Stress and Coating Optical polycarbonate is selected when a molded transparent component must combine impact resistance with a visible-range luminous transmittance above 89% at 3.0 mm thickness when measured according to ISO 13468-2. The material is amorphous, exhibits a glass transition temperature...
The Polycarbonate Part Crazed in Storage: Solvent Exposure on the Floor In production storage areas where floor-level solvent residues remain after maintenance shifts, transparent molded polycarbonate components occasionally develop dense networks of fine surface fissures after direct contact with the concrete floor. The polycarbonate part crazed in storage: solvent exposure...
Importing polycarbonate (PC) sheet under HS Code 3920.61 constitutes a compliance exercise in which tariff classification, anti-dumping screening, and packing for transit operate as interlocking controls rather than separate administrative steps. The Harmonized System subheading covers non-cellular plates, sheets, film, foil and strip of polycarbonates, not reinforced, laminated, supported or...
The Brand Went Short: Switching Polycarbonate Boards Without Losing the Warranty Supply allocations for branded polycarbonate board create a substitution condition governed less by tensile datasheet values than by the contractual language of the OEM approval file. A polycarbonate board designated under ISO 7391-2 may be characterised by viscosity number,...
A Customer Suddenly Asks for a BPA-Free Polycarbonate Part: The 90-Day Route The request arrives without prior specification review: a customer suddenly asks for a BPA-free polycarbonate part, and the 90-day route from initial inquiry to first article dossier begins immediately. Standard interfacial polycarbonate polymerized from bisphenol A and phosgene...
Polycarbonate (PC) is an amorphous thermoplastic produced by interfacial polymerisation of bisphenol A and phosgene or by melt transesterification with diphenyl carbonate. Medical-grade PC resins are typically characterised by a melt volume-flow rate of 6–12 cm³/10 min at 300 °C under a 1.2 kg load per ISO 1133-1:2022, a glass...
Moulding Thin-Wall Polycarbonate: Where the Flow Stops and Why is a processing question that arises from the thermal and rheological boundary of polycarbonate (PC). PC enters thin-wall injection moulding as an amorphous melt with a glass transition temperature near 145–150 °C, a density of 1.20 g/cm³, and a melt volume-flow...
Stress Cracking in Polycarbonate: The Machining Causes Nobody Warns You About Polycarbonate (PC) is an amorphous engineering thermoplastic with a glass transition temperature of approximately 147 °C, tensile modulus near 2.3 GPa, and tensile strength in the range of 60 MPa to 70 MPa for unfilled injection-moulded grades. The notched...
Gaskets and Fixings for Polycarbonate Roofing: Where Leaks Actually Start. Polycarbonate (PC) multiwall and corrugated roof sheets exhibit tensile yield strength of 60–70 MPa under ISO 527-2:2012, and clear grades transmit 80–82% of visible light per ASTM D1003. The linear coefficient of thermal expansion of PC is approximately 7.0 ×...
Polycarbonate (PC) sheet manufactured from bisphenol A polycarbonate resin is an amorphous engineering thermoplastic with a glass transition temperature near 147 °C and a solid density of 1.20 g/cm³ when measured per ISO 1183-1:2019. Extrusion grades of PC sheet typically exhibit a melt volume-flow rate of 6–10 cm³/10 min at...
Lexan Suffixes Explained: R, RU and A on a Polycarbonate Grade Code Alphanumeric suffixes in polycarbonate grade codes are operational controls rather than arbitrary identifiers. Lexan™ PC grades derived from bisphenol A and carbonyl chloride or diphenyl carbonate exhibit a glass-transition temperature of 147°C, density of 1.20 g/cm³, and amorphous...
Polycarbonate (PC): Exolon, Makrofol and the Other Polycarbonate Brands Met in a Specification Polycarbonate based on bisphenol A is an amorphous engineering thermoplastic with a glass transition temperature of approximately 145 °C to 150 °C and a density of 1.20 g/cm³ when determined in accordance with ISO 1183-1. The polymer...
Polycarbonate (PC) manufactured from bisphenol A and phosgene by interfacial polycondensation, or from bisphenol A and diphenyl carbonate by melt transesterification, is an amorphous engineering thermoplastic with a glass transition temperature generally reported between 145 °C and 150 °C, a density of 1.20–1.21 g/cm³ under ASTM D792, tensile yield stress...
The injection-moulded surface of a polycarbonate/acrylonitrile butadiene styrene (PC/ABS) blend behaves as a phase-separated system rather than a homogeneous polymer interface. Unfilled grades used for secondary finishing typically exhibit a density of 1.13–1.15 g/cm³ per ISO 1183-1:2019, a tensile modulus of 2200–2500 MPa per ISO 527-1:2019, and a Vicat B50...
Awnings, Carports and Skylights: Polycarbonate Where Glass Cannot Go Bisphenol-A polycarbonate is an amorphous engineering thermoplastic with a carbonate-linked aromatic backbone. Its use in awnings, carports, and skylights is governed by ISO 11963:2019 for polycarbonate sheets and, for multiwall profiles used in roofs, walls, and ceilings, EN 16153:2013+A1:2015. Solid sheet...
Polycarbonate Bottles and Food Containers: Which Markets Still Buy Them Polycarbonate (PC) remains a specialised material for food-contact bottles and returnable containers where impact loading, transparency, and dimensional stability justify the higher melt processing requirements. The global demand pattern is split by regulation, with the European Union applying a lower...
Hard Coating on Polycarbonate Lenses: Why the Softest Lens Needs the Toughest Layer Polycarbonate (PC) is specified in ophthalmic and safety eyewear because its impact resistance exceeds that of allyl diglycol carbonate and polymethyl methacrylate, while its refractive index of 1.586 permits lens centre thickness reductions for high-minus powers. A...
Polycarbonate Luggage: What the Shell Material Actually Tells You begins with the amorphous bisphenol-A polycarbonate resin, not the wheel housing or the fabric liner. The phrase “polycarbonate shell” describes a forming system, not a single material property. General-purpose PC exhibits a density of 1.20 g/cm³ according to ISO 1183-1:2019, a...
On a polycarbonate order, the words sheet, panel, board, and glazing operate as separate specification classes. They are not interchangeable labels for the same extruded or molded product. ISO 11963:2019 classifies polycarbonate sheet by type, dimensions, and characteristics, but it does not assign a commercial meaning to panel or board....
Polycarbonate (PC) is an amorphous thermoplastic produced from bisphenol A and phosgene or via melt transesterification, with a density of 1.20 g/cm³ per ISO 1183-1:2019. Unfilled general-purpose grades typically exhibit tensile stress at yield of 60–70 MPa per ASTM D638-14, Charpy notched impact strength of 65–75 kJ/m² per ISO 179-1:2010,...
Polycarbonate (PC) specified for polycarbonate for electrical enclosures—V-0, glow-wire and outdoor UV together—must satisfy three different ageing and fire-safety regimes in one moulded component. Unfilled polycarbonate typically carries a UL 94 V-2 rating at 1.5 mm; reaching V-0 requires flame-retardant chemistry that can simultaneously alter melt rheology, notched impact, dielectric...
Polycarbonate (PC) selected for medical device housings, luers, stopcocks, blood oxygenator housings, drug-delivery pump components, and cartridge reservoirs is distinguished less by a separate chemical backbone than by a controlled resin formulation with reduced metallic residues, low-extractable mould release, documented batch traceability, and a change-control process aligned with ISO 13485...
Extruding Polycarbonate Sheet: The Viscosity Window That Stops Sheet Sagging In production-scale polycarbonate (PC) sheet extrusion, bisphenol-A polycarbonate is processed as an amorphous thermoplastic with a glass transition temperature near 147 °C and a recommended melt-temperature range of 280–320 °C. The extrudate exits a coat-hanger or T-die as a free-standing...
H-Profile, U-Profile and Glazing Bars: The Polycarbonate Accessory Chain Polycarbonate glazing assemblies depend on a three-part accessory chain—extruded H-profiles, U-profiles, and load-bearing glazing bars—to convert discrete multiwall or solid sheets into a weathertight envelope. The accessory chain performs four functions: edge registration, controlled thermal movement, condensate management, and structural load...
Polycarbonate (PC) produced from bisphenol A by interfacial phosgenation or melt transesterification with diphenyl carbonate is specified for transparent sheet where initial luminous transmittance is approximately 89 % for a 3.0 mm plaque and initial yellowness index is below 2.0 under ASTM E313-20. The aromatic carbonate chromophore absorbs strongly in...
The Bend Went Cloudy: A Polycarbonate Thermoforming Failure Walk-Through Polycarbonate sheet at 3.0 mm nominal gauge was formed on a three-station vacuum forming machine with zoned ceramic heaters. The sheet had been dried in a desiccant dryer at 120 °C for 4 h and formed at a surface temperature of...
Auditing a Polycarbonate Supply Chain for BPA Statements Polycarbonate (PC) is conventionally produced from bisphenol A (BPA; CAS 80-05-7) and either carbonyl chloride via interfacial polymerization or diphenyl carbonate via melt transesterification. The polymer repeat unit contains the bisphenol A bis(carbonate) backbone, and trace unreacted BPA may persist depending on...
Fabrication of stock bisphenol-A polycarbonate sheet, rod, and plate in a machine shop differs from metal working in one decisive respect: the material is amorphous, notch-sensitive under certain chemical conditions, and viscoelastic at temperatures only modestly above ambient. The bulk mechanical properties establish the boundary conditions for cutting and clamping....
A V-0 Bar Passed But the Polycarbonate Housing Failed: Why Thickness Matters A V-0 classification on a 125 mm × 13 mm test bar is a thickness-specific qualification under UL 94 / IEC 60695-11-10, not an invariant material property. Unfilled bisphenol A polycarbonate (PC) may be listed at V-0 at...
Polycarbonate (PC) produced by interfacial polycondensation of bisphenol A and phosgene is an amorphous thermoplastic used in solid and multiwall roofing sheet because its visible light transmission reaches 88–90 % for 3 mm clear sheet (ASTM D1003-13), its tensile modulus is 2.3–2.4 GPa (ISO 527-2:2012), and its notched Izod impact...
Bisphenol A polycarbonate (PC) is an amorphous thermoplastic produced by interfacial phosgenation or by melt transesterification of bisphenol A with diphenyl carbonate. The aromatic carbonate linkage imposes chain stiffness, while the isopropylidene bridge permits limited segmental rotation; the material therefore exhibits no crystalline melting point and a glass transition temperature...
Polycarbonate (PC) brand ownership is distributed among Covestro, SABIC, Teijin, and Mitsubishi; mapping commercial resin families to these owner entities is a prerequisite for traceability, regulatory documentation, and interchangeability assessments. The phrase “Covestro, SABIC, Teijin, Mitsubishi: Mapping Polycarbonate Brands to Owners” describes a supplier-audit exercise in which the designations Makrolon,...
Material substitution errors in transparent plastic sheet are often embedded in the purchase descriptor before a polymer identification code is assigned. The phrase “Lexan Plexiglass” appears in industrial quoting portals, maintenance requisitions, and glazing replacement forms as if it identifies a single clear panel; it does not. ISO 1043-1:2011 assigns...
Gamma sterilisation turned the polycarbonate yellow: the specification fallout began when the posted irradiation dose of 25 kGy under ISO 11137-2 was not sufficient to account for the accumulated yellowness index shift measured under ASTM E313-20. General-purpose bisphenol A polycarbonate components exposed to cobalt-60 gamma radiation develop a yellow-brown tint...
Reading a Polycarbonate/ABS Datasheet: The Ratio Behind the Trade Name requires treating the commercial grade designation as an identifier, not as a composition statement. A product family may use one trade name for a 50 wt% polycarbonate grade and a 70 wt% polycarbonate grade, with only the tested property profile...
The Polycarbonate Greenhouse That Went Cloudy in Year Three: A UV Post-Mortem Post-mortem examination of a twin-wall polycarbonate (PC) greenhouse sheet removed after its third year of service shows that the visible clouding is concentrated in the outer 50–150 µm of the sky-facing surface rather than in the bulk sheet...
The First Shot Came Out Brittle: A Polycarbonate Drying Autopsy The first shot came out brittle from a 1300 kN servo-electric injection molding machine processing a clear polycarbonate grade with a melt volume-flow rate of 12 cm³/10 min at 300 °C and 1.2 kg per ISO 1133-1:2022. The component fractured...
Reading a Polycarbonate Datasheet: Density, Melt Flow, HDT and Impact Explained A polycarbonate datasheet is a standardized technical snapshot, and its utility depends on reading each property alongside the exact method, specimen geometry, conditioning history, and load condition that produced it. For unfilled polycarbonate (PC), the four most frequently compared...
Polycarbonate (PC) optical components—lens elements, sensor windows, light-pipe segments, display covers and automotive headlamp lenses—are routinely produced by injection molding, extrusion or machining from sheet. Annealing polycarbonate optics: taking stress out before it shows in the light path is a thermal post-processing step that reduces residual stress gradients before those...
In commercial polymer commerce, the distinction between polycarbonate resin and polycarbonate plastic is not a difference in repeat-unit chemistry but a boundary in supply-chain responsibility and specification ownership. Both materials are built on the same bisphenol A polycarbonate backbone, CAS 25037-45-0, with a carbonate linkage between aromatic rings. The term...
Hail Took Out the Glass Roof and Polycarbonate Was the Answer When hail took out the glass roof and polycarbonate was the answer, the replacement basis was not a single laboratory value but a combination of impact energy absorption, thermal movement compatibility, weathering retention, and code compliance. Bisphenol A polycarbonate...
Running a Polycarbonate Roofing Business: Stock, Offcuts and Warranty Claims Stock, offcuts and warranty claims form an interconnected operational chain in a polycarbonate roofing business. The material at the centre is extruded polycarbonate sheet, normally multiwall or solid, with a coextruded UV-barrier cap on at least one exposed face. Inventory...
Polycarbonate (PC) sheet is an amorphous aromatic polyester produced by interfacial reaction of bisphenol A with phosgene or by melt transesterification with diphenyl carbonate. For sheet applications, the resin is extrusion-formed into solid monolithic sheet, multi-wall sheet, or corrugated sheet under ISO 11963:2019 and EN 16240:2013 classifications. The optical appearance...
How Polycarbonate Sheet Travels: Container Loading, Edge Protection, and Moisture Polycarbonate sheet is transported as an engineering thermoplastic with high optical clarity, impact strength, and a sensitivity to edge defects and humidity that is often underestimated in logistics. The packaging envelope is an engineered interface between the extrusion line, container...
A customer wants 50 percent recycled polycarbonate: what is achievable is a specification envelope bounded by feedstock consistency, molecular weight retention, regulatory status, and conversion hardware. Virgin bisphenol A polycarbonate typically demonstrates a melt volume-flow rate of 10 g/10 min to 15 g/10 min at 300 °C under 1.2 kg...
Cleaning and Coating Polycarbonate Without Killing the UV Layer Polycarbonate (PC) sheet, lenses, and molded housings intended for outdoor glazing, automotive lighting, and medical windows typically carry a coextruded or coated UV-protective layer containing a benzotriazole, hydroxyphenyl triazine, or benzophenone absorber. The cap layer is not a cosmetic coating. It...
Thermoforming Polycarbonate: Drying, Pre-Heating and the Water-Bubble Failure Polycarbonate (PC) is an amorphous engineering thermoplastic with a glass transition temperature near 147 °C and a saturated moisture absorption of approximately 0.35 wt% after long-term immersion at 23 °C per ISO 62. In sheet form, PC is thermoformed at surface temperatures...
Moving a Polycarbonate Food-Contact Part to a Compliant Material: A Route Map Polycarbonate (PC) food-contact articles are generally moulded from bisphenol A–based aromatic polycarbonate homopolymer or copolyester carbonate grades selected for transparency, toughness, and dimensional stability. A typical grade exhibits a melt volume-flow rate of 10 cm³/10 min to 25...
Corrugated and Multiwall Polycarbonate Are Not the Same Product: A Field Guide Polycarbonate (PC) is an amorphous thermoplastic produced by the interfacial reaction of bisphenol A with phosgene or by melt transesterification with diphenyl carbonate. The unfilled polymer has a density of approximately 1.20 g/cm³ under ISO 1183-1:2019, a Vicat...
Polycarbonate (PC) is an amorphous engineering thermoplastic with a glass transition temperature near 147 °C and notched Izod impact resistance values exceeding 600 J/m for high-flow unfilled grades when tested according to ASTM D256-23. Solvent bonding polycarbonate: methylene chloride, annealing and joint strength are interconnected processing variables that determine whether...
Polycarbonate Enclosures Outdoors: UV, Impact and the IP66 Whole-Assembly Test are not independent acceptance paths. A polycarbonate housing that passes IEC 60529 water-jet testing when new can fail outdoors if UV stabilization or impact retention have not been specified. General-purpose bisphenol A polycarbonate offers a tensile yield strength of approximately...
Polycarbonate produced by interfacial phosgenation of bisphenol A or by melt transesterification is an amorphous thermoplastic with a glass transition temperature near 147 °C. In melt processing, the viscosity split between extrusion and injection grades is conventionally expressed as melt volume rate under ISO 1133-1:2022 at 300 °C and 1.2...
Mould Temperature in Polycarbonate: The Variable That Decides Stress and Shrinkage Polycarbonate (PC) is an amorphous engineering thermoplastic with a glass-transition temperature commonly reported between 145 °C and 150 °C. In injection moulding, the mould wall temperature determines the quench rate of the melt, the thickness of the frozen layer...
Regrind in Polycarbonate Moulding: How Many Cycles Before Impact Numbers Fall? Closed-loop regrind of bisphenol-A polycarbonate in injection moulding introduces a measurable shift in molecular weight distribution before bulk tensile or flexural properties show comparable change. The notched Izod impact value, determined according to ASTM D256-10 Method A or ISO...
Polycarbonate (PC) is specified for safety glasses, face shields and riot shields: polycarbonate as protective kit derives from a combination of optical transparency, high-strain-rate impact resistance, and broad thermoforming capability. Bisphenol-A polycarbonate is an amorphous thermoplastic with a density of 1.20 g/cm³ when tested to ASTM D792-20, a tensile yield...
Polycarbonate (PC) is an amorphous engineering thermoplastic produced by interfacial polymerization of bisphenol A and phosgene or by transesterification with diphenyl carbonate. Commercial unfilled PC sheet typically exhibits a density of 1.20 g/cm³ when tested in accordance with ISO 1183-1, a tensile modulus near 2300 MPa per ISO 527-2, and...
Polycarbonate tube and light pipe: extruded forms for lighting and fluid handling are manufactured from amorphous bisphenol A polycarbonate resin that combines a refractive index of 1.586 with visible-region luminous transmittance of 88–91 % through a 3.2 mm section when measured under ASTM D1003-21. In lighting, extruded polycarbonate light pipe...
Polycarbonate (PC) recyclate evaluation begins with the relationship between weight-average molecular weight, melt viscosity, and notch-sensitive failure. How many times can polycarbonate be reprocessed before impact strength collapses is not a fixed integer; it is a threshold controlled by initial molar mass, residual moisture before each pass, barrel residence time,...
Polycarbonate (PC) is an amorphous engineering thermoplastic with a typical density of 1.20 g/cm³, tensile yield strength in the range 60–70 MPa when tested according to ISO 527-2:2012, and notched Izod impact values commonly above 600 J/m per ASTM D256. Transparent solid and multiwall PC sheet products rely on a...
Polycarbonate (PC) is an amorphous thermoplastic produced by the interfacial or melt polymerization of bisphenol A with phosgene or diphenyl carbonate. The repeating carbonate linkage provides high melt viscosity, high ductility, and a measurable susceptibility to hydrolytic chain scission at processing temperatures. Unfilled general-purpose PC typically has a glass transition...
Thermal Welding Polycarbonate: Ultrasonic, Hot-Plate and Laser Compared Polycarbonate (PC) is an amorphous bisphenol-A-based engineering thermoplastic with a glass transition temperature of 144–148 °C, a melt processing range between 280 °C and 320 °C, and a thermal conductivity of 0.19–0.22 W/m·K. Unlike semi-crystalline polymers, PC does not exhibit a sharply...
Bisphenol-A polycarbonate (PC) is the predominant forward-lighting lens substrate because it combines a notched Izod impact resistance commonly above 600 J/m under ASTM D256-23 with luminous transmittance greater than 88% for a 3 mm uncoated plaque. The warranty classification “Headlights Yellowed at Year Four: A Polycarbonate Coating Warranty Claim” refers...
Polycarbonate (PC) extrusion line settings are governed by the interaction between the resin’s high melt viscosity, sensitivity to residual moisture, and abrupt shear-thinning behaviour. The temperature profile and die gap used on a sheet or profile line determine whether the melt remains within the narrow processing window that preserves molecular...
The Suitcase That Cracked at the Airport: PC, ABS and PC/ABS Under Impact is best analyzed as a materials-selection and processing problem, not as a simple material weakness. Luggage shells receive multiaxial blunt impacts at belt transfer points, carousel drops, and aircraft loading equipment. The impact strain rate can reach...
Polycarbonate (PC) is a linear aromatic polycarbonate polymerized industrially by two dominant routes: interfacial phosgenation of bisphenol A (BPA) and melt transesterification of BPA with diphenyl carbonate (DPC). Who Makes Polycarbonate: The Producers Behind Most of the World's Supply—this question resolves into a concentrated group of chemical producers with large-scale...
Anti-Dumping on Polycarbonate: What Importers Should Model Before Renewal Polycarbonate is an amorphous thermoplastic produced via interfacial polymerization of bisphenol A and phosgene or via melt transesterification with diphenyl carbonate. The repeat unit molecular weight is 254.3 g/mol, and the polymer has a glass transition temperature near 147 °C per...
Tolerance Stack-Up With Polycarbonate: Where Thermal Expansion Bites is the governing analysis for PC assemblies when a rigid mounting loop spans a temperature delta. The coefficient of linear thermal expansion of unfilled polycarbonate is 65 × 10−6 K−1 to 70 × 10−6 K−1 over 23 °C to 100 °C when...
Traceability in polycarbonate sheet—which batch went into which roof—requires a permanent linkage between the resin lot certificate, extrusion line log, coextruded UV cap layer record, and on-site installation register. For solid, corrugated, and multiwall PC roofing products governed by ISO 11963:2019 and EN 16153:2013+A1:2015, batch identity is the mechanism for...
Declaring Polycarbonate to Customs: Descriptions That Survive an Inspection Customs declarations for polycarbonate occupy a narrow space between tariff law and polymer characterisation. A description that survives inspection must reproduce the legal wording of the heading, identify the polymer according to ISO 1043-1:2011, and give the inspecting officer at least...
The Container Arrived With Scratched Polycarbonate Sheet: What Is Salvageable The container arrived with scratched polycarbonate sheet: what is salvageable is determined first by separating ductile burnishing from brittle fracture and by measuring residual optical haze. Incoming uncoated polycarbonate sheet, typically 2 mm to 6 mm nominal thickness, is inspected...
Polycarbonate Solid Sheet or Multiwall Board? Where Demand Is Moving Since building energy specifications began assigning full-envelope U-value targets to overhead glazing, the choice between solid polycarbonate sheet and hollow-chamber multiwall board has moved away from a single default specification. Solid PC sheet with a density of 1.20 g/cm³ and...
For roof dead-load calculations, polycarbonate sheet mass is derived from solid density rather than nominal overall thickness. The solid density of unfilled polycarbonate is 1.20 g/cm³ under ISO 1183-1:2019 and ASTM D792-20. A solid sheet therefore contributes 1.20 kg/m² for each 1 mm of thickness. Polycarbonate weight per square metre:...
Optical Sorting and Traceability: Making Recycled Polycarbonate Credible Polycarbonate (PC) recovered from post-industrial and post-consumer streams occupies a narrow technical position: it is an engineering thermoplastic with high intrinsic toughness, but the recycled form is often priced as a lower-tier feedstock because batch-to-batch variation in melt flow rate, residual coating...
BPA-Free Polycarbonate: What Alternatives Exist and What They Cost in Performance Polycarbonate (PC) manufactured by interfacial phosgenation of bisphenol A is specified for transparent instrument housings, microtiter plates, and reusable food-service ware because it combines high transmittance, impact toughness, and dimensional stability. Unfilled injection-molding grades exhibit tensile yield strength of...
The flame-retardant package in polycarbonate: sulphonate, phosphorus, silicone is constructed through a parallel evaluation of ignition resistance, melt flow, heat deflection temperature, and regulatory boundary conditions. The primary test target for electrical and electronic enclosures is vertical flame spread under IEC 60695-11-10 or ASTM D3801, usually quoted at 1.6 mm,...
Polycarbonate Glazing in Vehicles: Weight, Impact and the Coating That Decides Life are governed by measurable material limits rather than design preference. Glazing-grade polycarbonate has a density of 1.20 g/cm³ compared with 2.5 g/cm³ for soda-lime glass, giving an equal-thickness mass reduction of 48%. Notched Izod impact per ASTM D256...
Polycarbonate (PC): Policarbonato, Polycarbonate, and Lexan—The Spanish and Portuguese Buying Terms Polycarbonate (PC), CAS 25037-45-0, is an amorphous thermoplastic produced by interfacial phosgenation of bisphenol A or by melt transesterification using diphenyl carbonate. Unfilled polycarbonate records a density of 1.20 g/cm³ under ISO 1183-1:2019, a refractive index of 1.586 under...
Polycarbonate (PC) is an amorphous engineering thermoplastic produced by interfacial polymerization of bisphenol-A and phosgene or by melt transesterification with diphenyl carbonate; the repeating unit contains two aromatic rings, two methyl groups, and a carbonate linkage. Its density is 1.20 g/cm³ per ISO 1183-1, light transmission through a 3 mm...
In polymer data management, the symbol PC is assigned by ISO 1043-1:2011 to polycarbonate, an amorphous aromatic polyester produced from bisphenol A and phosgene or diphenyl carbonate. The same symbol appears in IT asset registers, WEEE collection streams, and desktop support tickets as an abbreviation for personal computer. The resulting...
Polycarbonate (PC) and the procurement shorthand “Poly Carb” refer to the same amorphous thermoplastic family derived from bisphenol A and phosgene or diphenyl carbonate. The formal registry identifier is CAS 25037-45-0, with density 1.20 g/cm³ under ISO 1183-1:2019. Buyers entering “Poly Carb” in a search bar are normally specifying unfilled...
What Is Polycarbonate Used For? Ten Everyday Objects Made From It Polycarbonate (PC) is an amorphous engineering thermoplastic produced by interfacial condensation of bisphenol A with phosgene or by melt transesterification with diphenyl carbonate. The carbonate linkage and aromatic ring structure produce optical clarity, a glass transition temperature near 147°C,...
Polycarbonate (PC) is specified for electrical enclosures, battery pack components, LED optics, and medical device housings where a UL 94 V-0 rating at 1.5 mm or 0.8 mm is a condition of product acceptance. Drying and regrind: how both quietly break a V-0 rating on polycarbonate is not a formulation...
Annealing Polycarbonate Parts: Time, Temperature and Why Skipping It Costs More Thermal conditioning of polycarbonate (PC) is a stress-relief operation placed between primary forming and downstream finishing. The process exposes molded, extruded, or machined workpieces to controlled oven residence below the glass transition. For unfilled grades, the upper soak temperature...
