Thin-wall injection moulding responds to drying enthalpy, gate sizing, and cold-food compliance thresholds
In thin-wall injection moulding of PLA FY402, the controlling constraint is not the melt processing window alone but the interaction between residual moisture, screw shear history, and cold-mould crystallinity. Hydrolysis is measurable as a drop in melt viscosity and a rise in free lactide vapour during mould opening; pre-drying with a desiccant dryer at 80 °C for 4–6 h to a moisture content below 250 ppm under ISO 15512 is therefore required before barrel residence begins. Processors using hopper dryers with dew point above -40 °C observe batch-to-batch viscosity drift and gate-vestige brittleness in multi-drop cold-runner tools. The injection unit preferably uses a screw L/D of 20–24:1 and compression ratio 2.0–2.5:1; low compression ratios below 1.8:1 do not dissolve lactide sublimate accumulating on the check ring, while ratios above 2.8:1 drive shear heating above 210 °C, at which lactide re-generation accelerates and plate-out appears on core pins. Barrel temperatures are profiled from 180 °C at the rear to 205 °C at the nozzle, and the melt should not be held above 200 °C for more than 10–15 min. For thin-wall food-service parts with wall thickness 0.8–1.5 mm, mould temperature is set at 20–40 °C for amorphous high-gloss surfaces; if sidewalls are crystallised at 90–110 °C, cycle time increases by 30–50% and dimensional stability shifts from the amorphous shrinkage range of 0.3–0.5% to the nucleated range of 0.2–0.4% in flow direction when measured after 24 h conditioning at 23 °C and 50% RH.
Compliance for this route rests on Commission Regulation (EU) No 10/2011 for plastic food-contact materials, with overall migration limit 10 mg/dm² tested to EN 1186-1; Chinese converters may additionally require GB 4806.7-2016. US FDA status for polylactic acid is not covered by 21 CFR 177.1520, which addresses olefin polymers; commercial PLA food-contact grades are instead supported by grade-specific Food Contact Notifications. Industrial compostability claims require EN 13432 or ASTM D6400, under which the finished cutlery item must demonstrate at least 90% ultimate biodegradation within 180 days and disintegration below 10% residue on a 2 mm sieve after 12 weeks. For cold-food cutlery and trays, PLA FY402 is processed neat at 100 wt% with processing stabiliser masterbatch at 0.2–0.5 wt%; slip/anti-block at 0.1–0.3 wt% is added only where stacked spoons or nested tubs show blocking during automated denesting. Where the part is crystallised for heat deflection, poly(D-lactic acid) nucleant at 0.5–2.0 wt% or talc at 0.5–1.5 wt% is dispersed into the melt, but the mould must reach at least 90 °C or the nucleant creates a brittle skin layer. PBAT toughening at 5–10 wt% is used sparingly in thin-wall tableware because its lower flexural modulus under ISO 178 reduces fork-tine and tray-rib stiffness; above 10 wt%, weld-line strength at the gate side becomes the limiting defect under 3–5 N fork-tine bending loads.
Production-scale injection machines for this route are typically run at clamp force from 1,000 kN to 3,000 kN for multicavity tooling of 16–48 cavities; hot-runner systems with valve gates are used when gate-vestige marks violate food-contact surface finish, but hot-runner temperatures must be limited to 200–210 °C because higher manifold temperatures produce lactide plate-out. Injection velocity is set to fill the cavity in 0.5–1.0 s, with holding pressure at 50–70% of peak pressure to avoid sink marks at the centre of fork handles. Terminal article types are limited to cold-service disposables: cutlery, cold cups with lids, portion trays for chilled foods, and nested tubs for deli portions. Articles exposed to liquid above 60 °C or microwaved are outside the reliable operating boundary of amorphous PLA FY402 unless the part has been crystallised, and even then heat deflection temperature under ISO 75-2/C typically remains below 100 °C.
What governs extruded PLA sheet stability during thermoforming feedstock production?
Cast-sheet lines running PLA FY402 for thermoforming feedstock exhibit two measurable failure modes when the extrusion window is not controlled: edge draw-in from insufficient melt strength and centre-line sag from excessive sheet temperature. On a twin-screw extruder with L/D 40–44:1 and vacuum degassing, barrel temperatures are maintained between 160 °C and 200 °C, with the feed zone kept at 160–170 °C to avoid pellet bridging in the throat. The polymer must be dried to below 250 ppm moisture under ISO 15512 before entering the feed port, because wet feedstock generates hydrolysis during the 2–4 min residence time and raises free lactide at the die lip. A three-roll calendering stack with roll temperatures of 15–30 °C draws the sheet to 0.2–1.2 mm; haul-off speed is limited by the onset of draw resonance, commonly observed above 15–25 m/min on unmodified PLA sheet.
Food-contact sheet used for dairy or chilled-produce lidding falls under Regulation (EU) No 10/2011 with overall migration below 10 mg/dm² under EN 1186-1, and if the finished tray is marketed as compostable, EN 13432 or ASTM D6400 applies to the entire article, including print and lidding film. US converters must verify the specific PLA grade under a Food Contact Notification; the generic olefin regulation 21 CFR 177.1520 does not apply to PLA. For sheet extrusion, PLA FY402 is blended with 10–20 wt% PBAT or 10–25 wt% PBS to raise edge tear resistance during thermoforming; additions above 25 wt% phase-separate under low-shear cast extrusion and produce visible haze bands. Acetyl tributyl citrate at 5–12 wt% is incorporated when the sheet requires cold bending below 4 °C, but plasticiser above 12 wt% reduces modulus and causes blocking on the roll stack. A nucleating agent such as talc at 0.5–2.0 wt% is used only when the downstream thermoforming station requires faster crystallisation between 90 °C and 110 °C; otherwise amorphous sheet is preferred for clarity. Chain extender at 0.1–0.5 wt% is added on lines that exceed 12 m/min haul-off speed to suppress edge sag.
Thermoforming of PLA sheet is conducted at 70–100 °C sheet temperature, which is close to the glass transition; the forming window is narrower than amorphous PET or PS, so zoned infrared heaters and plug assist are required to avoid corner thinning. Mould temperature is kept at 20–30 °C for clarity; higher mould temperatures promote crystallinity but extend cycle time. Terminal products from this route include transparent clamshell containers for bakery and fresh fruit, thermoformed trays for chilled meat with soaker-pad recesses, cup lids, egg trays, and single-use portion cups. The operational boundary is defined by cold-chain logistics: hot-fill above 60 °C and microwave reheating are outside the window, and frozen distribution requires a separate Charpy impact programme under ISO 179-1 at -20 °C because published data for FY402/PBAT sheet in frozen-food drop impact are limited.
| Standard or regulation | Application scope | Threshold / method |
|---|
| EU 10/2011 | Plastic food-contact materials | Overall migration 10 mg/dm² under EN 1186-1 |
| FDA FCN | US food-contact PLA | Grade-specific notification; no generic 21 CFR 177.1520 coverage |
| GB 4806.7-2016 | Chinese food-contact plastic articles | Overall migration and consumption limits per standard |
| EN 13432 | Industrial compostability of packaging | At least 90% biodegradation in 180 days; disintegration residue below 10% on 2 mm sieve after 12 weeks |
| ASTM D6400 | Compostable plastic specification | Equivalent 90% mineralisation and disintegration criteria |
| ISO 17088 | Compostability specification | Aligned with EN 13432 for recovery of compostable plastics |
| REACH 1907/2006 | Chemical safety of substances | SVHC content below 0.1 wt% |
| 94/62/EC | Packaging heavy metals | Sum of Pb, Cd, Hg, Cr(VI) below 100 mg/kg |
Fused filament manufacturing from high-melt-flow PLA feedstock
Diameter variance in PLA filament is a downstream readout of melt-strength constancy across the strand cross-section, not solely a winder control problem. A compounder running PLA FY402 as the majority polymer for filament extrusion must manage the fact that injection-moulding melt flow is high enough to produce draw-down under low tension. Published quantitative data for FY402 in 1.75 mm monofilament extrusion are limited; the process conditions below are used on single-screw filament lines with L/D 24–30:1, metering pump, and closed-loop laser micrometer control. Melt temperature is kept at 175–190 °C, which is lower than injection moulding because excessive temperature lowers melt strength and creates ovality. The water bath is set to 30–45 °C so that the filament enters the winder below 50 °C and does not stretch during spooling.
Compliance for general-purpose FFF filament is driven by chemical-safety regimes rather than food contact: REACH Regulation (EC) No 1907/2006 SVHC content below 0.1 wt%, RoHS 2011/65/EU if the filament is destined for electrical/electronic prototyping environments, and EN 71-3 for migration of heavy metals when the printed objects may be handled by children. Industrial compostability of printed waste is not certified from filament alone; EN 13432 applies only to a finished packaging article, not to unbonded filament. The formulation used for printable filament based on PLA FY402 is a blend, not a neat resin. 60–80 wt% PLA FY402 is diluted with 20–40 wt% of a lower-melt-flow PLA grade in the range 3–6 g/10 min under ISO 1133-1:2022 at 190 °C/2.16 kg to increase melt tension. A multifunctional epoxide chain extender at 0.1–0.5 wt% is used when the blend still shows diameter drift above ±0.05 mm on 1.75 mm filament. Pigment masterbatch is limited to 0.5–2.0 wt% because pigment particles above this level act as nucleation sites and change shrinkage along the printed layer.
The downstream production process is single-screw extrusion through a 1.75 mm or 2.85 mm die, calibration in a water trough, dual-axis laser measurement, and winding at constant tension of 100–300 g. Filament diameter must be held within ±0.05 mm for 1.75 mm and ±0.10 mm for 2.85 mm; larger variation produces under-extrusion at the printer drive gear. Terminal product types are bio-based printing filament for open-material desktop prototyping, education, and low-strength jigs and fixtures. This route is not suitable for food-contact printed objects unless the filament manufacturer has separately established compliance for the finished printed part, and layer adhesion strength measured under ISO 527-2 is typically lower across the Z-axis than amorphous injection-moulded PLA.
When glossy cosmetic packaging demands high injection speed without silver streaking
High-gloss cosmetic components produced from PLA FY402 place the gate area under simultaneous shear stress, thermal pressure, and visual inspection criteria that are more restrictive than food-service moulding. In hot-runner tools, the gate diameter is typically 0.8–1.5 mm and the melt enters the cavity at 180–205 °C; if the resin contains more than 250 ppm moisture, hydrolysis causes silver streaks that are indistinguishable from air-entrapment streaks at the gate. Mould temperature is held at 15–30 °C to achieve a gloss above 85 GU at 60° under ISO 2813 on polished tool steel. Ejector marks, weld lines around hinge bosses, and flow lines around logo recesses are critical defects because the part surface is not covered by labels.
Regulatory compliance for cosmetic packaging draws on Regulation (EC) No 1223/2009 indirectly through packaging compatibility; the polymer itself is assessed under REACH and, where applicable, EU 10/2011 if the pack may come into contact with formulation residues during filling. Cosmetic converters frequently require no substances of very high concern above 0.1 wt% and absence of heavy metals above the combined limit of 100 mg/kg for lead, cadmium, mercury, and hexavalent chromium under Directive 94/62/EC. The formulation for glossy cosmetic components is kept lean to preserve surface finish. PLA FY402 is used at 90–95 wt%, with an impact-modifier masterbatch at 5–10 wt% when the part includes snap-fit closures; modifying loadings above 10 wt% reduce surface hardness and can produce stress whitening at the ejector pin after 24 h at 50% RH. Colour masterbatch is limited to 1–3 wt%, and slip agent at 0.05–0.2 wt% is incorporated only for lipstick mechanisms where the rotary track requires a low coefficient of friction.
Production is carried out on injection machines with shot-size control better than 0.5% because short-shots around delicate logo features cannot be recovered. Clamp force is selected using 3.0–5.0 t/in² of projected area; injection velocity is profiled from fast initial filling to slower packing at the end of the cavity to prevent gas entrapment in the hinge area. Terminal article types include injection-moulded airless jar bodies, compact cases, lipstick inner mechanisms, and closure caps. The operational limitation is that PLA cosmetic packs are not compatible with high-temperature filling above 55 °C and are susceptible to scratch damage; surface hardness should be verified under ISO 1518-1 and can be improved by hard-coating, which then shifts the compostability claim outside the boundary of EN 13432 unless the coating is separately certified.
Injection moulding of horticultural pots from PLA FY402 is constrained by thick wall sections and outdoor storage conditions rather than food-contact migration. Wall thickness in nursery pots is typically 1.5–3.0 mm, which increases clamp-open cooling time and makes the centre of the base the last region to solidify. When filling thick sections with PLA FY402, the melt is kept at 180–210 °C and the mould at 15–30 °C to prevent uncontrolled crystallisation that distorts the drainage holes. Injection speed is reduced relative to thin-wall food service because jetting in thick cavities creates visible flow lines around the pot rim. The screw L/D is 20–24:1 with a compression ratio of 2.0–2.5:1; a shut-off nozzle is mandatory to prevent drool during mould-open cooling cycles that may exceed 20–40 s for thick-walled pots.
Compostability claims for horticultural pots must follow EN 13432 or ISO 17088 for industrial composting; soil-biodegradability claims require ISO 17556, and EN 17033 is not applicable to rigid pots because it covers soil-biodegradable mulch films. Articles sold in Germany, Austria, or Switzerland may require DIN EN 13432 certification, and the whole product, including pigments, must comply with heavy metal limits in EN 13432. For horticultural pots that must survive greenhouse handling, PLA FY402 is blended with 15–30 wt% PBAT to reduce cracking at the rim during pot filling; below 15 wt%, the rim fractures during mechanical transplanting, while above 30 wt%, the pot wall becomes too flexible for automated handling. Calcium carbonate or talc filler at 5–15 wt% is added to lower cost and reduce cycle time, but the filler increases density above 1.35 g/cm³ and reduces tear resistance. Processing aid at 0.5–1.0 wt% is used to disperse PBAT domains and prevent delamination at the injection gate.
Terminal products from this route are nursery pots, propagation trays, tree tubes, and plant clips. The outdoor service life is finite because PLA hydrolyses in wet soil; published data for this specific PBAT/PLA ratio in buried service are limited, so converters are advised to verify flexural modulus under ISO 178 at the intended wall thickness after accelerated humidity ageing under ISO 62. These articles are therefore positioned for single-season propagation rather than multi-year outdoor use. Industrial composting of the spent pot requires the converter to document disintegration under EN 13432 at the actual wall thickness, because thick-walled PLA pots may fail the 12-week disintegration threshold if not pre-shredded.
Twin-screw masterbatch production using PLA FY402 as the carrier resin shifts the critical control point from final part aesthetics to dispersive mixing intensity and water-cooled strand pelletiser stability. In this intermediate downstream route, PLA FY402 is not the terminal article but the continuous phase that carries pigments or functional additives into final PLA, PBAT, or PBS compounds. The carrier must have a melt viscosity low enough to wet pigment surfaces but not so low that the strand drools before the pelletiser. On a co-rotating twin-screw extruder with L/D 40:1 and screw diameter 25–75 mm, barrel temperatures are set between 160 °C and 190 °C; the first barrel is kept below 160 °C to prevent premature melting and feed bridging while the final zones are run below 190 °C to avoid lactide re-generation.
The masterbatch itself must satisfy REACH registration duties for the substances it contains and must not introduce SVHCs above 0.1 wt% into the final compound. If the final article is marketed as compostable, the masterbatch must not defeat EN 13432, which means pigments and additives must be assessed for heavy metal limits and ultimate biodegradability; inorganic pigments remain inert but count as non-biodegradable filler and can affect the disintegration threshold after 12 weeks. A colour masterbatch based on PLA FY402 typically contains 40–70 wt% carrier, 20–50 wt% pigment, 5–10 wt% dispersant, and 2–5 wt% bio-based wax. An additive masterbatch for nucleation uses 60–80 wt% PLA FY402, 10–25 wt% nucleating agent, and 1–3 wt% lubricant. The addition ratio into the final compound is usually 2–5 wt% for colour masterbatch and 1–3 wt% for nucleant masterbatch, though pigment loads above 50 wt% require screw profiles with three intensive kneading blocks and can cause torque excursions above 80% on small-diameter extruders.
Downstream production involves gravimetric feeding of PLA FY402 pellets, pigment, and dispersant into the main feed port, dispersion through a screw profile with at least two kneading sections, vacuum devolatilisation at -0.06 to -0.08 MPa, melt filtration through 80–100 mesh, strand die extrusion, water bath cooling at 30–40 °C, air knife drying, and strand pelletising. Terminal product types are bio-based masterbatch pellets for colouring and nucleating PLA/PBAT compounds; by themselves they are not sold as a final consumer article, so their compliance status is always conditioned by the final article into which they are dosed. The operational boundary is set by carrier hydrolysis: the masterbatch must be dried to below 250 ppm moisture before compounding, and the finished pellets must be sealed in moisture-barrier bags because stored masterbatch at 60% RH can pick up moisture and cause splitting or foaming when later dosed into a dry polymer stream.
BBCA Polylactic Acid (PLA) FY402 is an unfilled thermoplastic polyester supplied as a cylindrical pellet grade for injection molding, thin-wall rigid packaging, and short-cycle disposable articles. The polymer is produced by ring-opening polymerization of lactide derived from renewable lactic acid. It is classified as a medium-flow PLA, with a melt mass-flow rate typically in the range of 8 g/10 min to 20 g/10 min when measured under ISO 1133-1:2022 at 190 °C with a 2.16 kg load. Conditioned density is approximately 1.24 g/cm³ according to ISO 1183-1. Tensile yield strength under ISO 527-2 falls between 58 MPa and 65 MPa, elongation at break is below 6 %, and flexural modulus is reported between 3400 MPa and 3700 MPa under ISO 178. The property envelope supports stiff, dimensionally stable parts but not impact-dominated applications.
Typical property envelope for BBCA PLA FY402 as supplied
| Property | Test method | Typical value |
|---|
| Melt mass-flow rate | ISO 1133-1:2022, 190 °C, 2.16 kg | 8 g/10 min–20 g/10 min |
| Density | ISO 1183-1 | 1.24 g/cm³ ± 0.02 g/cm³ |
| Tensile yield strength | ISO 527-2 | 58 MPa–65 MPa |
| Tensile elongation at break | ISO 527-2 | 2 %–6 % |
| Flexural modulus | ISO 178 | 3400 MPa–3700 MPa |
| Notched Izod impact strength | ISO 180/A | 2.0 kJ/m²–3.5 kJ/m² |
| Heat deflection temperature | ISO 75-2/B, 0.45 MPa | 50 °C–55 °C |
| Glass transition temperature | ISO 11357-2 | 55 °C–60 °C |
| Melting temperature | ISO 11357-3 | 165 °C–175 °C |
| Mold shrinkage, parallel | ISO 294-4 | 0.3 %–0.5 % |
Is the Viscosity Window Compatible With Thin-Wall Injection Molding?
Thin-wall filling with BBCA PLA FY402 is governed by the interplay between melt temperature, injection velocity, and cavity thickness. For wall sections from 0.8 mm to 1.5 mm, barrel profiles between 180 °C and 220 °C are typical on injection molding machines with screw diameters of 20 mm to 35 mm and L/D ratios of 20:1 to 25:1. Nozzle temperatures should be held at 190 °C to 215 °C, while mold temperatures between 20 °C and 40 °C favor short cycles and acceptable ejection. Injection pressure requirements rise sharply below 200 °C; processing trials on cold-runner tools indicate that fill pressures above 120 MPa are rarely necessary when melt temperature is maintained above 195 °C. Pack and hold pressures from 30 MPa to 50 MPa usually compensate for the relatively high volumetric shrinkage of amorphous PLA. Back pressure should be limited to 0.3 MPa to 0.5 MPa to avoid excessive shear heating and premature molecular weight loss.
Flow length to wall thickness ratios up to 120:1 can be achieved in simple fan-gated geometries, but ribbed or multi-cavity tools with long cold runners may require sequential valve-gate actuation. Because the melt cools quickly at low mold temperatures, injection velocity should be set between 40 mm/s and 80 mm/s for submillimeter walls. Higher velocities may generate shear-induced molecular orientation, producing anisotropic shrinkage and warpage. The grade is not formulated for gas-assisted or foaming processes unless the converter introduces a suitable nucleating system and validates cell morphology under production conditions.
Moisture control is a binding processing constraint for this resin. Before melt processing, pellets must be dried in a desiccant dryer to a residual moisture level below 250 ppm, which is equivalent to 0.025 wt%. A drying temperature of 80 °C for 4 h to 6 h at a dew point no higher than −40 °C is the standard starting condition. If ambient relative humidity exceeds 60 %, open bag exposure should remain under 30 min, and granulate return lines should be blanketed with dry air. Moisture-induced hydrolysis reduces molecular weight rapidly in the melt phase, producing splay, lower melt viscosity, reduced impact strength, and unstable holding pressure. Drying above 100 °C is not recommended because pellet softening and bridge formation can occur in the hopper. Purging should be performed with polypropylene or low-density polyethylene; purging with PVC or polyoxymethylene is incompatible because acidic degradation products may accelerate polyester chain scission. Melt residence time above 200 °C should not exceed 5 min, and the heater bands should be idled at 160 °C during interruptions of more than 20 min.
Thermal Deflection Limits and the Crystallization Window at the Mold Wall
Unmodified PLA has a low heat deflection temperature because its crystallization rate is slow. The amorphous parts molded from FY402 typically soften near 55 °C under a flexural load of 0.45 MPa, and continuous use above 50 °C is outside the operating boundary for non-annealed articles. Hot-fill packaging, dishwasher-safe components, and under-hood parts therefore require either crystallization via mold temperature elevation or blending with nucleated or mineral-filled PLA compounds. When the mold wall is held at 80 °C to 110 °C, PLA can develop crystallinity during cooling, but the cycle time lengthens substantially because isothermal crystallization half-times for standard PLA often exceed 60 s at 100 °C. Published data for this specific FY402 configuration under high mold-temperature crystallization is limited; converters should generate differential scanning calorimetry isotherms under ISO 11357-7 and validate actual part crystallinity before relying on elevated heat resistance.
Annealing of molded articles at 80 °C to 100 °C for 15 min to 30 min can raise the heat deflection temperature above 90 °C, but uncontrolled annealing produces shrinkage, warpage, and surface haze. Dimensional change during secondary annealing must be measured on representative parts because shrinkage parallel to flow and transverse to flow can differ by 0.2 % or more. The low glass transition temperature also requires ejection care: parts should be cooled below 45 °C before demolding to avoid distortion caused by the ejector system.
When FY402 Replaces Lower-MFI Extrusion Grades or Impact-Modified PLA in Existing Molds
The primary difference between FY402 and low-melt-flow PLA extrusion grades is flow-length capability. A low-MFI PLA with a melt flow rate below 5 g/10 min has greater melt strength for sheet extrusion, blown film, or foam expansion, but it may fail to fill thin ribs and long flow paths without excessive injection pressure. FY402 reduces filling pressure and improves knit-line formation in complex cavities, but it has lower melt strength and is not suitable for blown film, deep-draw sheet, or extrusion blow molding unless modified with a chain extender or branching agent. When substituting FY402 into a tool designed for a lower-MFI PLA, short-shot pressure and pack pressure should be reduced by 10 % to 20 % as an initial setting because the lower viscosity can lead to overpacking, flash, and dimensional variation.
Compared with impact-modified PLA compounds that contain elastomeric modifiers, olefinic copolymers, or polybutylene succinate blends, FY402 displays notched Izod impact strength below 3.5 kJ/m², whereas toughened PLA grades typically exceed 8 kJ/m² to 15 kJ/m². The unfilled grade therefore performs poorly in living hinges, closures with snap fits, and thin-walled containers subject to drop impact at chilled temperatures. The trade-off is stiffness and surface hardness: FY402 retains a flexural modulus above 3400 MPa, while impact modification usually reduces flexural modulus below 2500 MPa. The unfilled grade also has higher optical clarity in amorphous molded parts, but clarity collapses once spherulitic crystallization is induced by high mold temperatures or annealing.
In comparison with nucleated high-heat PLA formulations, FY402 lacks the rapid crystallization needed for hot-fill or microwavable articles. Nucleated PLA grades often demonstrate heat deflection temperatures above 120 °C after molding at 100 °C, while FY402 remains below 55 °C in the amorphous state. Processors should not attempt to use FY402 as a drop-in replacement for nucleated PLA in hot-water or dishwasher environments without redesigning the thermal conditioning step.
Regulatory conformance for BBCA PLA FY402 depends on the finished article and the converter’s specific formulation. The resin is generally evaluated for compliance with EU Regulation (EU) No 10/2011 on plastic materials intended to come into contact with food, and overall migration testing is performed under the food simulant conditions assigned to the intended use. In the United States, direct food-contact use of PLA requires an effective Food Contact Notification or an appropriate threshold-of-regulation submission; 21 CFR §177.1520 does not automatically cover polylactic acid as an olefin polymer. Compostability is normally demonstrated under EN 13432 or ASTM D6400 on the final part geometry, not on the pellet alone. The resin is also subject to European Union chemical reporting under REACH and is expected to meet the substance restrictions in RoHS Directive 2011/65/EU Annex II. No medical, implantable, or durable-goods claim is implied by compostability certification; converters must validate each finished article against the applicable standard and generate their own regulatory compliance file for the supplied grade.
Compliance matrix applicable to BBCA PLA FY402
| Framework | Reference | Boundary condition |
|---|
| EU food contact | Regulation (EU) No 10/2011 | Overall migration must be confirmed on finished part |
| US food contact | FDA FCN or threshold-of-regulation | No automatic coverage under 21 CFR §177.1520 |
| Industrial composting | EN 13432 | Validation required for specific wall thickness and part mass |
| Industrial composting | ASTM D6400 | Compostability is geometry-dependent |
| Chemical reporting | REACH | Substance volume and SVHC screening apply |
| Restricted substances | RoHS Directive 2011/65/EU Annex II | Lead, mercury, cadmium, hexavalent chromium, PBB, PBDE limits apply |
| Biobased carbon verification | ASTM D6866 or EN 16640 | Renewable carbon content must be verified per batch or product |
