| HS Code | 266516 |
| Polymerbase | Polylactic acid (PLA) and polypropylene (PP) alloy |
| Materialclass | Bioplastic alloy |
| Biobasedcontent | Typical 30-50% |
| Density | Typical 1.15-1.25 g/cm³ |
| Meltflowrate | Typical 3-10 g/10 min at 190°C/2.16 kg |
| Tensilestrength | Typical 25-40 MPa |
| Tensileelongationatbreak | Typical 100-300% |
| Flexuralstrength | Typical 35-50 MPa |
| Flexuralmodulus | Typical 1200-1800 MPa |
| Notchedizodimpactstrength | Typical 10-25 kJ/m² |
| Heatdeflectiontemperature | Typical 70-90°C at 0.45 MPa |
| Vicatsofteningtemperature | Typical 80-110°C |
| Moldingshrinkage | Typical 1.0-2.0% |
| Waterabsorption | Typical 0.3-0.8% |
| Processingmethod | Injection molding and extrusion |
| Form | Pellets |
| Color | Natural/white or custom colors |
| Toughness | High |
As an accredited Biolloy™ High Toughness Polylactic Acid/PP Bioplastic Alloy factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Biolloy™ High Toughness Polylactic Acid/PP Bioplastic Alloy is packaged in 25 kg moisture-resistant, foil-lined industrial bags for bulk shipping. |
| Container Loading (20′ FCL) | 20′ FCL: Biolloy™ High Toughness Polylactic Acid/PP Bioplastic Alloy, typically 25 kg bags, palletized, approx. 18–20 MT per container. |
| Shipping | Biolloy™ High Toughness Polylactic Acid/PP Bioplastic Alloy is shipped as non-hazardous solid pellets in sealed moisture-barrier liners inside fiber drums or cartons on pallets. No special transport placarding required. Store cool, dry, away from heat and direct sunlight. Keep packaging closed until use. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and open flames. Keep containers tightly closed, labeled, and upright. Protect from moisture, excessive humidity, and strong oxidizing agents. Avoid prolonged UV exposure and temperatures above recommended processing limits. Use first-in, first-out stock rotation. Ground/bond during handling if dust is generated. Keep away from incompatible materials. |
| Shelf Life | Shelf life is 12 months if stored in a cool, dry place in original unopened packaging, protected from sunlight and moisture. |
Lower pillar trim, door scuff plates, and seat side shields are injection-moulded from Biolloy™ High Toughness Polylactic Acid/PP Bioplastic Alloy with nominal wall stock between 2.0 mm and 2.4 mm. The alloy enters the cavity through a heated sprue bushing and two to four valve gates. Barrel set points are normally 180°C, 190°C, 195°C, and 200°C from feed to metering zone, with nozzle temperature held at or below 205°C because PLA-rich domains undergo chain scission above 210°C and release low-molecular-weight lactide. A desiccant dryer is required when ambient relative humidity exceeds 60%. Drying is performed for 4 h at 80°C with a dew point not higher than -40°C. Moisture before processing is verified at no more than 0.025% by weight using ISO 15512:2019. Weld-line strength in grained door insert components is the principal failure mode because the long flow path creates multiple knit lines at rib bosses and mounting bosses. The use of a heated valve gate system and a mould temperature between 30°C and 40°C improves knit-line entanglement at the seam. When the tool temperature drops below 20°C, the PP continuous phase solidifies rapidly and generates a weak boundary layer at the weld line. Sharp transitions in wall thickness at mounting bosses should be radiused to at least 0.5 mm because notch sensitivity increases as the PLA phase vitrifies. Compliance for automotive interior use requires horizontal flammability testing to ISO 3795:1989 and FMVSS 302. The maximum burn rate in the horizontal direction shall not exceed 100 mm/min. VOC limits are set by platform-specific OEM specifications and are measured using VDA 277:2018 for total carbon emissions and VDA 278:2011 for condensable substances. Grade lot validation is required against each OEM limit because published universal VOC ceilings do not exist across vehicle platforms. Mould release residues from external agents can elevate VOC values and should be avoided. Because the alloy contains a PP phase, it does not meet EN 13432 compostability criteria. Bio-based carbon content is measured by ASTM D6866-20, but the PP fraction reduces the total renewable carbon share compared with neat PLA.
In multicavity small appliance tools, the balance between melt flow and post-mould dimensional stability determines snap-fit assembly yield. The material is dried under the same conditions as automotive interior components, with a maximum residual moisture content of 0.025% by weight. Processing uses a melt temperature of 190°C to 200°C and a screw back pressure between 5 bar and 10 bar. Clamp force is calculated from projected area and an expected peak cavity pressure of 40 MPa to 60 MPa. A typical 120 t moulding machine is sufficient for two-cavity appliance enclosures with total projected area up to approximately 300 cm², but the tool layout must be confirmed by mould-flow simulation because the PLA phase increases viscosity sensitivity to shear. A cooling time of 22 s to 28 s is typical for wall sections of 2.5 mm when the mould temperature is held at 25°C to 35°C. Snap-fit engagement hooks moulded from this alloy should avoid sharp internal corners below 0.5 mm radius because notch sensitivity increases at lower mould temperatures. Ejector pins should be placed away from thin snap beams to reduce stress whitening during demoulding. Compliance for cord-connected small appliances is evaluated under IEC 60335-1:2020. The non-metallic enclosure must be tested for glow wire resistance. The glow wire test at 750°C is applied to contact-carrying parts in unattended operation, while parts retaining current may require 850°C. The specific test protocol is IEC 60695-2-11:2021, and flame persistence must not exceed 30 s after removal of the glow wire tip. The grade is not inherently flame retardant, so any V-0 claim must be achieved through a dedicated flame-retardant formulation that is separately tested under UL 94 at the minimum end-product wall thickness. Published data for this specific configuration is limited for colour-dependent glow wire behaviour, so black and dark masterbatch variants should be tested separately.
Extruded edge banding strips with a width of 21 mm to 45 mm and thickness from 0.8 mm to 3.0 mm are run on single-screw extruders with an L/D ratio between 30:1 and 36:1. The PLA/PP alloy requires a vented barrel with vacuum of -0.06 MPa to -0.08 MPa downstream of the plastication zone to strip residual moisture and lactide from the melt. Melt temperature at the die is kept between 185°C and 195°C to prevent sag and maintain dimensional accuracy. Screw speed is adjusted to maintain die pressure between 80 bar and 120 bar for a 1.2 mm thick strip. The extrudate is pulled through a calibrator block held at 15°C to 25°C and then wound onto cores. In high-speed profile extrusion, melt strength can become the limiting factor above 25 m/min haul-off speed. If the melt curtain oscillates or draws down excessively, reducing extruder temperature by 5°C often stabilises the strip, but the processing window is narrow. A temperature reduction greater than 10°C can raise melt viscosity and overload the barrel drive. The processing window is therefore held within approximately ±5°C around the validated set point. The surface is tested for scratch and abrasion resistance according to ASTM D4060-19 using a CS-10 wheel, 500 g load, and 500 cycles. Office furniture edge banding is further evaluated for peel adhesion to particle board using a 90° peel test after hot-melt adhesive application, but no universal ISO method exists for the finished component. The material should be verified for dimensional stability after 24 h at 60°C to avoid bowing when stored in warm transit conditions. Published data for this specific configuration is limited; production trials should include a strip thickness capability study at three extruder temperatures.
For hard-shell luggage rear covers and wheel box liners, sheet extrusion followed by plug-assisted thermoforming is the primary conversion route. Sheet gauge is typically 1.8 mm to 3.0 mm, with width up to 800 mm depending on the roll stack. The compounded pellets are dried to below 0.025% moisture before extrusion because any residual water flashes at the die exit and nucleates micro-bubbles at the PLA domain boundaries. A co-rotating twin-screw extruder with L/D 40:1 is used for the compounding step, while a single-screw sheet line with a barrier screw and melt pump delivers a uniform melt to the die. Melt temperature for sheet is held at 190°C to 200°C. The formed sheet is indexed into a plug-assisted thermoformer using aluminium tooling with a surface temperature of 80°C to 110°C, although the actual forming temperature must be established for each gauge. Plug speed below 350 mm/s reduces local thinning at the four corner radii. Pre-stretch pressure between 0.4 MPa and 0.8 MPa is used before the plug contacts the sheet. After forming, the shell is trimmed with a steel rule die or CNC router. Corner impact damage is the main field failure mode. Laboratory evaluation is performed using the constant-height impact test per ASTM D5420-21 at -20°C, but published data for this specific configuration is limited. The alloy is not a direct replacement for polycarbonate sheet at extreme low temperature, and unmodified grades may show reduced crack propagation resistance when the sheet is below 0°C. For airline carry-on use, no polymer-specific flammability standard applies to the outer shell, but airlines and brands frequently require a horizontal burn rate not exceeding 100 mm/min per ISO 3795:1989. Shore D hardness of the formed surface is verified with ISO 868:2003, but grade-specific limits must be taken from the supplier lot certificate rather than generic literature values.
Monitor rear covers and stand bases present large planar surfaces with boss arrays for PCB mounting and cable management channels. The alloy is moulded with sequential valve gating to eliminate weld lines across visible surfaces. The tool must compensate for anisotropic shrinkage. Measurements are taken after 48 h conditioning at 23°C and 50% relative humidity in accordance with ISO 291:2008. Mould shrinkage is determined on a plaque per ISO 294-4:2018 for both in-flow and cross-flow directions. The differential shrinkage between the PLA-rich surface and PP-rich core can cause warpage if the cooling channels are not balanced within ±2°C across the cavity. The gate-free design for a monitor rear cover with a diagonal dimension up to 700 mm requires a mould temperature of 30°C to 40°C and a melt temperature no higher than 205°C. The low melt temperature keeps the viscosity high enough to prevent the melt front from racing along thick ribs. Boss arrays with a diameter of 4 mm and a height of 12 mm are moulded with a draft angle of at least 0.5° to reduce ejection friction. Ejection force is measured with a load cell on the ejector plate, and values above 15 kN usually indicate that the ribs are shrinking onto the cores. External enclosure parts must be evaluated for fire safety under IEC 62368-1:2018. The plastic fire enclosure requirement is satisfied only if the material can meet a flammability classification or pass a prescribed end-product test at the minimum wall thickness. An unfilled PLA/PP alloy typically requires a flame-retardant package to reach V-0 at 1.5 mm under UL 94. The heat deflection temperature of the grade is determined by ISO 75-2:2013 using method A at 1.8 MPa, but grade-specific values must be obtained from the lot certificate. Published data for the exact PLA-to-PP ratio in this product is limited, so tool trials should include a full capillary rheology sweep using ISO 11443:2021 before multi-cavity tool approval.
Before colour masterbatch selection, toy structural components such as building block chassis, ride-on wheel hubs, and doll furniture frames are moulded from the alloy when processing aids are selected to preserve impact performance at low temperature. The material must be screened against EU REACH Annex XVII Entry 51 phthalate restrictions, with each listed phthalate below 0.1% by mass of plasticised material. The moulded surface is tested using EN 71-3:2019+A1:2021 migration limits for 19 elements. Extraction is performed for 2 h in 0.07 M hydrochloric acid at 37°C. For the US market, ASTM F963-23 Section 4.3.5 includes soluble heavy metal content requirements and is aligned with 16 CFR 1303 for lead paint, but the base resin still requires certification of soluble elements. Processing at the lower end of the melt temperature window reduces thermal degradation by-products that could otherwise elevate total organic content in aqueous migration testing. Mould release agents must be selected from food-contact or toy-specific grades. Silicone-based external release agents can leave a surface film that changes chromium migration results. Insert moulding of metal axles is possible with the alloy, but the metal insert temperature should be maintained at 80°C to 100°C to avoid premature freeze-off and micro-cracking around the insert. Not all colourants are acceptable. Cadmium-based pigments are prohibited under EU REACH Annex XVII Entry 23 and should not be used in any export-grade formulation. Mechanical testing for toys uses ASTM F963-23 Section 4.6 for small parts and use-and-abuse testing. The material should be verified for notched impact resistance after injection moulding according to ASTM D256-10. Because the PP phase limits compostability, toy components made from this alloy are not marketed as biodegradable under EN 13432. Manufacturers should maintain separate documentation for bio-based carbon content under ASTM D6866-20 and for toy mechanical safety under ASTM F963-23.
| Application segment | Standard designation | Test condition | Core verification |
|---|---|---|---|
| Automotive lower pillar trim | ISO 3795:1989 / FMVSS 302 | Horizontal burn | Burn rate ≤ 100 mm/min |
| Small appliance housings | IEC 60695-2-11:2021 | Glow wire 750°C or 850°C | Flame persistence ≤ 30 s |
| Office furniture edge banding | ASTM D4060-19 | CS-10 wheel, 500 g, 500 cycles | Taber wear index |
| Luggage shells | ASTM D5420-21 | Gardner impact at -20°C | Fracture pattern and crack propagation |
| Monitor rear covers | IEC 62368-1:2018 / UL 94 | V-0 at minimum thickness | Flame class |
| Toy structural components | EN 71-3:2019+A1:2021 / ASTM F963-23 / EU REACH Annex XVII Entry 51 | 2 h, 0.07 M HCl at 37°C; phthalate < 0.1% | Element migration and phthalate content |
Competitive Biolloy™ High Toughness Polylactic Acid/PP Bioplastic Alloy prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618136850665
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Biolloy™ High Toughness Polylactic Acid/PP Bioplastic Alloy is supplied as a pelletized thermoplastic alloy in which a poly(lactic acid) matrix is compatibilized with a polypropylene minor phase. The primary injection molding grade is designated Biolloy™ HT-300; a higher-flow variant, Biolloy™ HT-310, is specified for thin-wall parts where flow length-to-wall thickness ratio exceeds 150:1. Both grades are intended for rigid applications requiring measurable renewable carbon content without the full brittle failure envelope of unmodified PLA. The composition bridges the rheological and thermal properties of PLA and PP, so processing parameters cannot be transferred directly from either neat resin. Lot-specific certificates of analysis should be consulted because compatibilizer concentration, moisture content, and melt flow rate affect mechanical property reproducibility.
Unmodified PLA commonly fails in notched impact at values below 5 kJ/m² under ISO 179-1:2010/1eA at 23 °C, while unmodified PP exhibits higher notched Charpy values but contains no bio-based carbon. Biolloy™ HT-300 is formulated to place notched Charpy impact in the range of 12–25 kJ/m² at 23 °C, with tensile elongation at break reaching 8–25 % under ISO 527-2:2012. This performance does not arise from a simple binary blend; without reactive compatibilization, PLA and PP form coarse, unstable phase domains often larger than 10 µm, causing delamination at knit lines and sharp tensile strength loss. The alloy employs a reactive interfacial strategy reported by independent compounders as maleic anhydride-grafted PP or epoxy-functional ethylene copolymer chemistry, although the supplier has not disclosed the exact grafting level. The compatibilizer locates at the PLA–PP interface, reduces interfacial tension, and stabilizes a dispersed PP phase with number-average domain sizes typically below 2 µm. The property consequence is a shift in the brittle–ductile transition toward lower strain rates and lower temperatures, although tensile modulus remains below that of neat PLA. Precise domain size depends on screw design, barrel temperature profile, and addition sequence; published data for this specific configuration is limited outside the supplier’s own technical reports.
On a production-scale 40:1 L/D co-rotating twin-screw extruder, the grade is typically compounded with a melt temperature between 205 °C and 215 °C, a screw speed of 250–350 min⁻¹, and vacuum devolatilization below −0.08 MPa. The feed zone must be configured to avoid premature melting of the PP phase before PLA granules have softened; otherwise, phase inversion can occur and notched impact falls by more than 40 % relative to the same formulation compounded with downstream side feed of the compatibilizer masterbatch. Strand pelletizing is sensitive to water bath temperature. In trials with a 2 mm die hole, water temperature below 45 °C produced continuous strand fracture at pelletizer haul-off, while water temperature above 55 °C produced fused strands and irregular pellet geometry. A two-zone water bath with first zone at 50–55 °C and second zone at 30–35 °C is therefore recommended. Thermal stability boundaries are set by the PLA phase. Above 220 °C, random chain scission accelerates and generates lactide oligomers that migrate to the surface and form a white haze on molded parts. In a twin-screw compounding trial with barrel set points above 225 °C, residual lactide concentration measured by headspace GC-MS increased from 0.3 wt% to 1.1 wt%, and notched Charpy impact at 23 °C decreased by 35 %. Melt temperature should therefore not exceed 215 °C at the die, and hot-runner thermocouples should be verified against a calibrated contact probe because internal shear heating can raise actual melt temperature by 5–15 °C above set point.
Injection molding of Biolloy™ HT-300 requires a general-purpose polyolefin screw with a compression ratio of 2.0:1–2.5:1 and a shut-off nozzle; open nozzles can produce drool during screw recovery because the melt has lower viscosity than neat PP at the same temperature. Barrel temperatures from feed to nozzle are normally set at 180 °C, 190 °C, 195 °C, 200 °C, and 205 °C; the hot runner manifold should be held below 210 °C. A melt cushion of 3–6 mm and a holding pressure of 40–60 MPa are suggested for mold filling; injection speed should be medium to high, with a fill time of 0.5–1.5 s for wall thicknesses up to 2.5 mm. The pelletized product should be dried before molding at 80 °C for 3–4 h using a desiccant dryer with a dew point no higher than −40 °C; a moisture content below 250 ppm is required for stable surface finish and consistent melt viscosity. At relative humidity above 60 %, drying time should be extended to 4–6 h. Melt filtration through a 60-mesh screen pack is used in compounding to remove char particles and crosslinked compatibilizer gels; filter pressure rise should be monitored because a pressure delta above 8 MPa over a 4 h run indicates excessive residence time or local overheating. After the run, purge with high-viscosity PP or a commercial purging compound; do not leave the alloy in a heated barrel above 210 °C for more than 15 min. Amine-based additives should be avoided if the reactive compatibilizer contains epoxy functionality; the amine-epoxy reaction can generate crosslinked gels that plug narrow hot-runner gates.
Capillary rheometry at 210 °C shows shear-thinning behavior with a power-law index of 0.35–0.45; apparent melt viscosity at 100 s⁻¹ is typically 250–400 Pa·s. This is lower than neat PLA at the same temperature, improving filling of thin ribs but increasing flash risk if mold parting line wear exceeds 0.02 mm. The mold should be checked with feeler gauges after 50,000 cycles when flash control is critical.
| Property | Test Method | Typical Screening Envelope |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 at 210 °C, 2.16 kg | 12–20 g/10 min |
| Density | ISO 1183-1:2019 | 1.08–1.15 g/cm³ |
| Tensile strength at yield | ISO 527-2:2012, Type 1A, 5 mm/min | 45–55 MPa |
| Tensile modulus | ISO 527-2:2012 | 2.0–2.6 GPa |
| Tensile elongation at break | ISO 527-2:2012 | 8–25 % |
| Flexural modulus | ISO 178:2019 | 2.1–2.7 GPa |
| Notched Charpy impact, 23 °C | ISO 179-1:2010/1eA | 12–25 kJ/m² |
| Notched Izod impact, 23 °C | ASTM D256-10 | 80–150 J/m |
| Heat deflection temperature, 0.45 MPa | ISO 75-2:2013 | 95–110 °C |
| Vicat softening temperature A50 | ISO 306:2013 | 115–130 °C |
| Mold shrinkage, parallel | ISO 294-4:2018, 2 mm plaque | 0.7–1.0 % |
| Mold shrinkage, perpendicular | ISO 294-4:2018, 2 mm plaque | 0.9–1.4 % |
Substitution of a 20 wt% talc-filled PP with Biolloy™ HT-300 is most feasible when the part is injection molded and wall thickness remains above 1.2 mm. The alloy reduces density from approximately 1.05–1.20 g/cm³ for mineral-filled PP to 1.08–1.15 g/cm³, depending on PP content, so weight reduction is not automatic; the main change is introduction of renewable carbon. Bio-based carbon content, measured by ASTM D6866-21 or EN 16640, depends on PLA fraction and must be specified in the purchase agreement because fossil-based PP can dominate the total carbon pool. In a 1.5 mm wall container evaluated on a 120-tonne injection molding machine with a 35 mm screw, clamp force requirements were comparable to a 20 wt% talc-filled PP because the alloy exhibits slightly higher viscosity at 205 °C and requires lower pack pressure to avoid flash. The alloy also allows lower mold temperatures of 40–60 °C than neat PLA, reducing cycle time relative to PLA-only molding. However, continuous use above 60 °C is not recommended for load-bearing parts because heat deflection temperature under 0.45 MPa is 95–110 °C, which is lower than mineral-filled PP grades with HDT B values above 120 °C.
At the opposite end of the substitution spectrum, the product should not be treated as a drop-in replacement for a PLA/PBAT flexible film resin. The tensile modulus of Biolloy™ HT-300 is approximately 2.0–2.6 GPa under ISO 527-2:2012, whereas PLA/PBAT film grades frequently operate below 1.0 GPa. Conversely, the high-toughness PLA/PP alloy exhibits lower notched impact than super-tough PP reactor grades with notched Izod values above 400 J/m under ASTM D256-10. The differentiating position is therefore a semi-rigid material with renewable carbon content between neat bio-based PLA and fossil-based PP, requiring part designers to verify weld-line strength, chemical resistance, and long-term hydrolysis behavior before substituting. Weld-line strength in a double-gated tensile bar can be 20–30 % lower than single-gated strength because PP domains can orient along the weld plane; this should be assessed by molding a double-gated ASTM D638-14 Type I specimen and comparing tensile strength at yield.
| Comparative Property | Biolloy™ HT-300 | Neat PLA Injection Grade | Neat PP Homopolymer | PLA/PBAT Flexible Grade |
|---|---|---|---|---|
| Density, g/cm³ | 1.08–1.15 | 1.24–1.26 | 0.90–0.91 | 1.25–1.30 |
| Tensile modulus, GPa | 2.0–2.6 | 3.0–3.5 | 1.2–1.6 | 0.3–0.8 |
| Notched Charpy impact at 23 °C, kJ/m² | 12–25 | 2–5 | 6–12 | 25–60 |
| Heat deflection temperature, 0.45 MPa, °C | 95–110 | 55–65 | 100–120 | 40–60 |
| Renewable carbon content | 30–50 %, PLA-content dependent | >99 % | <1 % | >40 % |
Compliance screening is limited to the base resin families and additives declared in the safety data sheet. The PP fraction is generally covered by FDA 21 CFR 177.1520 for olefin polymers, and the PLA fraction may fall under food-contact notifications specific to the supplier. REACH and RoHS Directive 2011/65/EU Annex II restrictions should be confirmed through lot-level declarations, particularly for cadmium, lead, and phthalate residues from recycled content. The grade does not contain intentionally added per- and polyfluoroalkyl substances; however, external mold release agents can alter surface migration behavior and should be restricted to food-contact-approved formulations. Migration testing under EN 1186 or ISO 6486 may be required for food-contact parts; no universal approval should be inferred from a single compliance statement.
