| HS Code | 940878 |
| Density | 1.25 g/cm³ |
| Melt Flow Rate | 3-8 g/10 min (190°C/2.16 kg) |
| Melting Point | 145°C |
| Tensile Strength | ≥35 MPa |
| Elongation At Break | ≥200% |
| Flexural Strength | ≥45 MPa |
| Flexural Modulus | ≥1500 MPa |
| Notched Izod Impact Strength | ≥10 kJ/m² |
| Heat Deflection Temperature | ≥75°C |
| Vicat Softening Point | ≥85°C |
| Biodegradation Rate | ≥90% |
| Processing Temperature | 160-190°C |
| Drying Temperature | 80°C for 2-4 h |
As an accredited SOLPOL -5000B PBS/Polylactic Acid Hard Polymer Injection/Extrusion Resin factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SOLPOL-5000B resin is packaged in 25 kg moisture-barrier bags, stacked on pallets for safe transport and storage. |
| Container Loading (20′ FCL) | SOLPOL-5000B PBS/Polylactic Acid Hard Polymer Injection/Extrusion Resin loaded in 20' FCL container, 25 kg bags, palletized, secured for ocean transport. |
| Shipping | SOLPOL-5000B PBS/Polylactic Acid Hard Polymer Injection/Extrusion Resin is typically shipped as a non-hazardous, non-regulated solid in moisture-barrier bags, drums, or supersacks. Keep dry and away from heat, sunlight, and ignition sources. No special placarding usually required; follow local transport rules. Store cool and ventilated. Handle with standard industrial hygiene. |
| Storage | Store at ambient temperature in a cool, dry, well-ventilated area away from direct sunlight, heat, ignition sources, and strong oxidizers. Keep containers tightly closed to prevent moisture ingress and contamination. Use appropriate grounding/bonding to avoid static discharge. Maintain clean, labeled containers. Follow the manufacturer’s SDS and local regulations. Avoid excessive stacking and temperatures above recommended limits. |
| Shelf Life | Shelf Life: Typically 12 months if stored unopened in original packaging, cool, dry, and away from moisture, heat, sunlight. |
Application mapping for SOLPOL-5000B is restricted to downstream processes where semi-crystalline polyester rigidity, compostability, and melt-processability intersect. The following scenarios address injection molding and extrusion paths only; no claims are made for rotational molding, blow molding, or solvent casting unless specified.
For single-use cutlery manufacturing, injection molding of SOLPOL-5000B is carried out on hydraulic injection molding machines of 120–180 t clamp force, equipped with general-purpose reciprocating screws of 20:1–24:1 L/D and check rings having free-flow clearances of 0.5–1.0 mm. The screw speed is limited to 60–120 rpm to keep melt residence time short, because the PLA fraction undergoes thermal chain scission above 210°C and shear-induced temperature rise in the metering zone is typically 5–12°C. Drying is performed in desiccant dryers at 65–80°C for 4–6 h until residual moisture is below 250 ppm; this threshold is critical because water at processing temperature hydrolyzes ester linkages and raises melt flow index over a 30 min hold. Melt temperature is maintained at 175–200°C, with the nozzle set 5–10°C below the metering zone to reduce stringing and drool. Mold temperature is held at 18–30°C with chilled water circuits; lower mold temperatures shorten crystallinity development and improve stacking tolerance, while higher mold temperatures increase surface gloss but extend cooling time by 2–5 s per 1.0 mm wall thickness. Formulation addition for this sector uses SOLPOL-5000B at 90–100 wt%, with dried sprues and runners incorporated at ≤20 wt% only after grinding and re-drying to ≤200 ppm moisture; higher regrind fractions reduce melt viscosity and lower notched impact energy below the 3.0 kJ/m² threshold under ISO 180:2019. A polyester-compatible slip/antiblock masterbatch is added at 0.5–1.5 wt% when nested cutlery stacking force must be reduced; primary amine-containing additives are excluded because they catalyze ester aminolysis and cause surface streak defects. Food-contact compliance is evaluated under Commission Regulation (EU) No 10/2011 Annex I, with overall migration testing according to EN 1186-1 and specific migration of total lactic acid and succinic acid in 10% ethanol and 3% acetic acid simulants. In the U.S. regulatory pathway, no single 21 CFR section lists PBS/PLA blends; food-contact conformance is managed through the food-contact substance notification framework rather than a generic 21 CFR listing. Industrial compostability is verified according to EN 13432 for disintegration and biodegradation; the product is not automatically compliant with ASTM D6400 unless batch-specific testing is completed. Mechanical verification follows ISO 527-2 for tensile properties and ISO 180:2019 for notched Izod impact. Terminal finished product types include forks, spoons, knives, stirrers, and small tasting spoons with wall thickness from 1.5 mm to 3.5 mm.
Because sheet sag and melt strength are the controlling variables, cast sheet extrusion of SOLPOL-5000B uses a single-screw extruder with 30:1 L/D, barrier mixing sections, and a vacuum vent connected to a melt pump before a flex-lip flat die of 800–1 200 mm width. The melt pump stabilizes output against viscosity fluctuations and reduces die pressure variation to ±1.0 bar. The resin is pre-dried to ≤200 ppm moisture at 65–75°C for 4 h; wet feed causes microvoids in the sheet surface and reduces melt strength due to hydrolysis. Melt temperature is kept at 160–190°C, with die temperature 180–195°C; exceeding 200°C for more than 8 min residence time produces yellowing and a sharp decline in extensional viscosity. Chill roll temperatures are set between 20°C and 40°C depending on sheet gloss and curl balance; lower temperatures promote lower crystallinity and higher clarity, while higher temperatures reduce sheet stress but increase blocking. Formulation addition for sheet stock consists of SOLPOL-5000B at 75–90 wt%, an acrylic processing aid at 0.3–0.8 wt%, mineral antiblocking agent at 0.5–1.5 wt%, and polyester slip additive at 0.1–0.5 wt%. An epoxy-functional chain extender masterbatch is added at 0.3–0.6 wt% when the sheet enters thermoforming with deep draw ratios above 1.5:1; this addition modifies melt strength enough to reduce sag at surface temperatures of 85–110°C. Thermoforming is performed on plug-assist machines with syntactic foam plugs heated to 85–95°C, mold temperature 20–30°C, and forming air pressure 4–6 bar. Sheet thickness ranges from 0.3 mm to 1.2 mm; at thickness below 0.4 mm, edge folding and web cooling require machine-direction orientation to be controlled below 5% shrinkage. Compliance in this sector covers Commission Regulation (EU) No 10/2011 Annex I for food-contact trays, EN 13432 for compostability, ISO 527-3 for film and sheet tensile behavior, ISO 6603-2 for puncture impact, and ISO 1133-1:2022 for melt mass-flow rate control. Terminal finished product types include clamshell containers, produce trays, deli containers, clear lids, and blister packs for dry goods.
In thin-wall capsule production for compostable portion packs, the highest thermal stress occurs because the dry coffee bed reaches 80–95°C during extraction, while PLA-rich hard segments have a heat deflection temperature near 50–60°C under 0.45 MPa load according to ISO 75-2. The capsule body must therefore be designed with wall thickness between 0.5 mm and 1.2 mm, and the injection molding process must avoid excessive residual stress that leads to rim cracking after storage at 40°C and 75% relative humidity. Drying is performed at 70–80°C for 4–6 h to a residual moisture of ≤200 ppm; any higher moisture content lowers melt viscosity and produces gas burn marks at the vent. The melt temperature is controlled between 185°C and 210°C, with a maximum residence time of 6 min; exceeding 210°C triggers rapid PLA chain scission and an increase in free lactic acid levels that can be detected by headspace gas chromatography. Mold temperature is set at 15–25°C to freeze the melt quickly and maintain dimensional tolerances of ±0.05 mm on the sealing rim. Injection speed is set at 80–160 mm/s for fill times of 0.3–0.8 s; the flow-length/wall-thickness ratio often exceeds 150:1, which requires hot runner systems with valve gates and manifold temperatures 195–210°C. Formulation addition uses SOLPOL-5000B at 80–95 wt%, a talc-based nucleating masterbatch at 0.5–1.5 wt% to raise crystallization rate and reduce cycle time, and a PBS-rich impact modifier at 5–15 wt% to prevent rim chipping during high-speed filling lines. Color masterbatch is added at 1–3 wt% only if it is compounded on a polyester-compatible carrier; polyolefin-based color carriers cause delamination streaks. Regulatory compliance for the capsule body is assessed under Commission Regulation (EU) No 10/2011 Annex I, and compostability under EN 13432; North American labeling may require ASTM D6400 testing. Mechanical testing includes ISO 180:2019 notched impact, ISO 527-2 tensile yield stress, and ISO 1133-1:2022 MFR checks on incoming resin. Published data for SOLPOL-5000B in this specific capsule geometry is limited; production tooling trials with the actual hot runner layout and filling line are required to validate extraction survival, and capsule designs requiring steam sterilization above 95°C are outside the verified operating window. Terminal finished product types include coffee pods, tea capsules, and portion packs for beverage concentrates.
For agricultural and horticultural clip production, injection molding machinery of 60–120 t clamp force is used with cold runners and edge gates placed on the non-visible surface to avoid gate blush on living hinge areas. The resin is dried to ≤250 ppm moisture at 65–75°C for 4 h before molding; melt temperature is set at 170–190°C and mold temperature at 15–25°C. The critical process condition is the living hinge: hinge thickness is set at 0.25–0.45 mm, and the hinge must be flexed immediately after ejection while the part is still above the glass transition temperature of the PLA-rich phase, which avoids premature stress whitening. Formulation addition for this sector uses SOLPOL-5000B at 70–85 wt%, a biodegradable carbon black masterbatch at 1–3 wt% to provide ultraviolet screening and field identification, and a ductile PBS-rich masterbatch at 10–25 wt% when the clip is expected to survive more than 100 flexural cycles. Fillers that are not biodegradable are excluded because the finished part must meet EN 13432 disintegration after 12 weeks in industrial composting and biodegradation after 6 months under ISO 14855-2. Field performance is evaluated under ISO 4892-2 for accelerated weathering; however, accelerated UV data do not predict soil burial behavior because microbial degradation of the PBS fraction dominates below the soil surface. Tensile and impact properties are tested according to ISO 527-2 and ISO 180:2019, with notched Izod impact above 4.0 kJ/m² required for vine fastener installation in cool weather. Terminal finished product types include vine clips, trellis fasteners, plant identification labels, propagation clips, and branch spreaders.
For monofilament extrusion used in fused filament fabrication, a single-screw extruder of 24:1 L/D is equipped with a melt filtration screen pack of 100–150 µm and a melt pump to stabilize filament diameter. The resin is dried to ≤150 ppm moisture at 65–75°C for 4–6 h; residual moisture above 150 ppm produces filament porosity that appears as surface roughness and diameter spikes at the laser gauge. Melt temperature is controlled between 165°C and 185°C, the die temperature is set 5°C above melt, and the filament enters a water bath at 25–40°C before air drying. Diameter is controlled to 1.75 ±0.05 mm or 2.85 ±0.10 mm by dual-axis laser micrometers; the haul-off speed is slaved to the melt pump output, and the winder uses a closed-loop tension of 0.5–1.5 N. Formulation addition uses SOLPOL-5000B at 90–100 wt%, a processing stabilizer masterbatch at 0.2–0.6 wt%, and a polyester-compatible pigment masterbatch at 1–3 wt%. Compliance for this sector is governed by REACH Annex XVII for hazardous substance restrictions, RoHS Directive 2011/65/EU for electrical and electronic equipment if filaments enter consumer printing, and ISO 527-2 for filament tensile properties. Melt mass-flow rate is checked per ISO 1133-1:2022 at 190°C with 2.16 kg load; values outside the specified grade window alter extrusion head pressure and layer adhesion. Terminal finished product types include biodegradable fused filament fabrication filament in 1.75 mm and 2.85 mm diameters, humidity-sealed with desiccant to maintain moisture below 200 ppm.
When cosmetic packaging demands high-gloss rigidity without polystyrene, SOLPOL-5000B is injection molded in polished S136 ESR mold steel with diamond-polished surfaces below 0.05 µm Ra to reproduce high-gloss finish without secondary polishing. The resin is dried to ≤200 ppm moisture at 65–75°C for 4 h; insufficient drying produces silver streaks on the visible surface. Melt temperature is set at 185–205°C, mold temperature at 20–30°C, and injection speed at 40–90 mm/s; hold pressure is profiled from 600 bar to 900 bar to pack thick sections without sink marks. Cooling time is set between 10 s and 25 s depending on wall thickness; wall thickness variations above 0.5–3.0 mm should be transitioned with 1:3 length-to-thickness ratios to avoid warpage. Formulation addition uses SOLPOL-5000B at 85–95 wt%, a high-clarity polyester nucleating masterbatch at 0.5–1.0 wt%, a colorant masterbatch at 0.5–2.0 wt%, and a processing aid at 0.3–0.6 wt%. Chemical compatibility of the finished part with ethanol-water formulations is tested according to ISO 175; stress-cracking can occur above 30% ethanol content, so secondary caps with internal liners are required when the formula includes aggressive solvents. Mechanical validation uses ISO 178 for flexural modulus, ISO 306 for Vicat softening temperature, and ISO 527-2 for tensile properties. Regulatory compliance includes REACH Annex XVII and EU Regulation (EC) No 1223/2009 for cosmetic product packaging safety, with specific migration testing conducted under Commission Regulation (EU) No 10/2011 when the packaging is expected to contact food-like creams. Terminal finished product types include airless jar bases, snap caps, compact cases, lipstick tubes, and dropper collars.
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SOLPOL-5000B is identified by the supplier as a PBS/polylactic acid hard polymer injection/extrusion resin supplied in pellet form for reciprocating-screw injection moulding and for single-screw or co-rotating twin-screw extrusion. The model code “5000B” is producer-specific and is not defined by ISO 1043-1:2011 or ASTM D4000:2023. Public third-party data for this exact grade is limited; therefore, the numerical intervals below are class-typical boundaries for high-hardness PBS/PLA injection/extrusion compounds and must be checked against the lot-specific certificate of analysis.
Class-typical specification ranges for a hard PBS/PLA injection/extrusion compound include melt flow rate measured at 190 °C under 2.16 kg according to ISO 1133-1:2022 of 8–25 cm³/10 min, density by ISO 1183-1:2019 method A of 1.24–1.35 g/cm³, tensile strength under ISO 527-2:2012 specimen 1A of 45–60 MPa, tensile modulus of 2.5–3.8 GPa, flexural modulus under ISO 178:2019 of 2.8–4.0 GPa, notched Izod impact under ISO 180:2023 at 23 °C of 3–6 kJ/m², heat deflection temperature at 0.45 MPa under ISO 75-2:2013 method B of 85–105 °C, and Vicat softening temperature VST/A50 under ISO 306:2022 of 120–140 °C. These are class ranges, not lot-specific acceptance criteria.
For rigid injection-moulded cutlery, cosmetic component bodies, thin-wall clamshell inserts, and extruded sheet for thermoformed trays, acceptance generally requires tensile properties under ISO 527-2:2012, flexural modulus under ISO 178:2019, and puncture impact under ISO 6603-2:2023. Disposable cutlery moulds are typically specified for flexural modulus above 2.8 GPa and notched Izod impact above 3 kJ/m². Cold-formed hinge packaging is limited to hinge wall thickness below 0.5 mm; thicker hinges exhibit stress whitening at 500 cycles in a 60° flex test.
Polyester hydrolysis is the primary process risk. PBS and PLA segments absorb moisture; pellets exposed at 23 °C and 60–70% RH may exceed 250 ppm moisture within 6–12 h depending on pellet geometry and liner condition. Processing at moisture above 250 ppm causes molecular weight loss and a measurable increase in melt flow. On a 30 mm screw injection moulding machine, surface splay appears on moulded components when moisture exceeds approximately 300 ppm; the same parts show a notch impact loss of 1.5–2.0 kJ/m² relative to dry material. A closed-loop desiccant dryer with a dew point of ≤ -40 °C is used for 4–6 h at 70–80 °C. The hopper should be blanketed with dry air when ambient RH exceeds 60%. Over-drying above 90 °C causes pellet surface tack and hopper bridging, particularly in conical hoppers with long feed throats.
Before start-up after storage, moisture verification is required. A moisture balance with 0.01% resolution is sufficient for incoming checks, but Karl Fischer titration according to ISO 15512:2019 is preferred below 200 ppm. A production lot stored for 72 h in a damaged gaylord liner exhibited melt-flow drift of 4–6 g/10 min and surface splay; subsequent drying at 80 °C for 5 h restored the melt flow to within 1.0 g/10 min of the original value but did not fully recover notched Izod impact. This irreversibility indicates hydrolysis damage cannot be fully reversed once chain scission has occurred.
On a 32 mm co-rotating twin-screw extruder with L/D 44:1, barrel zones from feed throat to die are set at 150/160/170/175/180/175 °C. At screw speed 200–400 rpm, actual melt temperature is kept at 185–195 °C; residence time above 200 °C is limited to ≤ 4 min. A vacuum vent at -0.08 MPa to -0.09 MPa gauge removes moisture and volatile oligomers. Drive torque is maintained below 80% of rated torque. When torque exceeds this limit at 400 rpm, the melt develops discolouration at the kneading blocks, indicating local thermal runaway.
Injection moulding conditions on a 1000 kN hydraulic clamp machine with a 30 mm diameter screw, 20:1 L/D, and pin-gated cold runner are typically: barrel 150/160/165/170/175 °C, mould temperature 20–40 °C, hydraulic back pressure 5–8 MPa, injection speed 40–80 mm/s, and a melt cushion of 3–5 mm. Clamp force is held at 4.5–6.0 kN/cm² of projected area for wall thicknesses between 2.0 mm and 4.0 mm. Thin-wall parts below 1.0 mm may require injection speed above 120 mm/s and melt temperature at the upper end of the range, but the risk of splay increases if the material has not been dried to ≤ 150 ppm. Shot volume is maintained at 30–70% of barrel shot capacity. Below 25%, residence time increases and melt-flow drift above 1.5 g/10 min can occur. A check-ring non-return valve should be wear-resistant; clearance above 0.15 mm on a 30 mm screw has produced inconsistent cushion and part weight variation of 0.2–0.4%.
Capillary rheometry data for the hard PBS/PLA class indicate shear-thinning flow. At 190 °C and 100 s⁻¹, apparent viscosity is typically 400–900 Pa·s. At 1000 s⁻¹, apparent viscosity falls to 120–250 Pa·s. This shear sensitivity supports thin-wall filling but creates pressure-control problems in sheet extrusion when screw speed variation exceeds ±2%. A 40 mm single-screw extruder with L/D 30:1, general-purpose screw, and melt pump is therefore specified for sheet production; without a melt pump, a screw speed drop of 2% has been recorded as a die-pressure fall of 3–5 bar and a measurable gauge variation of 0.05–0.10 mm across 600 mm sheet.
Below 175 °C, melt viscosity increases rapidly, and flow-length ratio drops below 1:120 on a pin-gated cold runner at 1000 bar injection pressure. Above 210 °C for more than 3 min, the polyester backbone undergoes ester exchange, lactide reformation, and colour shift. DSC analysis under ISO 11357-3:2018 normally shows a PLA melting endotherm between 150 °C and 165 °C and a PBS melting endotherm between 90 °C and 115 °C. The dual endotherm confirms a two-phase or partially compatible morphology and explains why low melt temperature can produce visible delamination in thick sections above 6 mm.
In sheet and profile extrusion, equipment must hold melt temperature within ±5 °C. A three-roll calendering stack is run at 40–60 °C roll temperature, with roll gaps of 0.5–1.2 mm and line speeds of 6–12 m/min. Winding tension above 500 N on a 600 mm roll produces blocking and surface transfer unless interleaf film is used. Profile extrusion through a 16 mm slit die at 170–180 °C is limited to draw ratios below 1.5:1; higher draw ratios produce melt fracture and sharkskin. Regrind levels up to 20 wt% are class-typical for sprues and edge trim, provided regrind is dried to the same moisture ceiling. Above 20 wt%, melt-flow lot-to-lot variation can exceed 1.5 g/10 min, and sheet thickness control becomes irregular. Masterbatch addition is limited to 2–4 wt%, and the masterbatch carrier must be pre-dried with the base resin.
Compared with neat PLA, SOLPOL-5000B belongs to a harder but less brittle class. Neat PLA general-purpose injection grades have tensile modulus above 3.0 GPa, elongation at break below 5%, and notched Izod impact often under 2.5 kJ/m². The hard PBS/PLA class retains tensile modulus above 2.5 GPa but typically extends elongation at break to 5–15% and notched Izod impact to 3–6 kJ/m². The trade-off is heat resistance: adding PBS lowers heat deflection temperature compared with neat PLA, so this class may be unsuitable when the part must survive hot-fill above 85 °C without annealing.
Compared with neat PBS, the hard class moves in the opposite direction. Neat PBS exhibits tensile modulus of 0.3–0.5 GPa and elongation at break above 200% under ISO 527-2:2012. The hard PBS/PLA class raises tensile modulus above 2.5 GPa and flexural modulus above 2.8 GPa, producing a rigid injection moulding resin. Compared with polypropylene homopolymer, the hard PBS/PLA class has higher density and generally lower heat deflection temperature; PP homopolymer density is 0.90–0.91 g/cm³ and some grades show HDT at 0.45 MPa above 100 °C. The primary difference is hydrolysis-mediated degradation and industrial composting potential, although those claims require validation.
| Property | Test method | Hard PBS/PLA class | Neat PLA | Neat PBS | PP homopolymer |
| Density | ISO 1183-1:2019 | 1.24–1.35 g/cm³ | 1.24–1.28 g/cm³ | 1.24–1.27 g/cm³ | 0.90–0.91 g/cm³ |
| Melt flow rate | ISO 1133-1:2022 | 8–25 cm³/10 min at 190 °C/2.16 kg | 6–20 cm³/10 min at 190 °C/2.16 kg | 10–30 cm³/10 min at 190 °C/2.16 kg | 8–25 g/10 min at 230 °C/2.16 kg |
| Tensile modulus | ISO 527-2:2012 | 2.5–3.8 GPa | 3.0–3.6 GPa | 0.3–0.5 GPa | 1.2–1.8 GPa |
| Tensile strength | ISO 527-2:2012 | 45–60 MPa | 55–70 MPa | 25–40 MPa | 30–40 MPa |
| Elongation at break | ISO 527-2:2012 | 5–15% | 2–5% | 200–400% | 100–600% |
| Flexural modulus | ISO 178:2019 | 2.8–4.0 GPa | 3.2–3.8 GPa | 0.4–0.6 GPa | 1.2–1.7 GPa |
| Notched Izod impact at 23 °C | ISO 180:2023 | 3–6 kJ/m² | 2–3 kJ/m² | 40–60 kJ/m² or no break | 3–8 kJ/m² |
| HDT at 0.45 MPa | ISO 75-2:2013 method B | 85–105 °C | 100–115 °C | 70–85 °C | 95–115 °C |
Product-specific SOLPOL-5000B values may fall outside these class intervals; the supplier certificate of analysis and technical data sheet are the only valid lot-specific specification.
Operational boundaries include moisture, temperature, load, and compliance. The hard PBS/PLA class is not recommended for sustained service above 85 °C without annealing or reinforcement. Hot-water contact above 60 °C promotes hydrolysis; acidic or strongly alkaline solutions accelerate chain scission. Food-contact use requires lot-specific confirmation under EU No 10/2011, an applicable FDA food-contact notification, or a national positive list. Industrial compostability claims require validation to EN 13432:2000, ASTM D6400-21, or an equivalent national standard. The resin should not be blended with additives that release amine or strong acid species because these may catalyse polyester degradation during extrusion. Equipment purging after runs longer than 72 h should use a dedicated polyester purge grade or dismantled screw cleaning; polyolefin purges alone have left hard PLA/PBS residues on screw flights and check-ring seats.
