Ambient produce, bakery, and deli clamshells represent the highest-volume downstream cut for Revode 110 sheet extrusion. The resin must be pre-dried in a desiccant dryer with a dew point of -40 °C or lower and a drying temperature of 80 °C for a minimum of 4 h; residual moisture before extrusion should be below 250 ppm, and values above 400 ppm produce measurable intrinsic-viscosity loss from ester hydrolysis at melt temperatures exceeding 180 °C. This hydrolysis-driven viscosity drop appears on the thermoforming line as edge-tear during plug-assisted forming, sheet sag after the downstack, and inconsistent wall thickness in corners. If lot MFR under ISO 1133-1 at 190 °C/2.16 kg drifts below 2 g/10 min, screw torque rises and sheet edge-thickness variation increases; above 4 g/10 min, sag after the roll stack becomes difficult to correct by adjusting roll gap alone. A single-screw extruder with 30:1 to 36:1 L/D, a barrier screw with compression ratio between 2.5:1 and 3.5:1, and a melt pump ahead of the die provides the melt stability required for sheet widths above 800 mm. The melt temperature should be held at 200 °C to 210 °C, and the flat die should be set at 190 °C to 205 °C; residence time above 10 min at these temperatures accelerates yellowing and reduces molecular weight. On a vertical three-roll stack, the middle roll temperature is maintained between 25 °C and 45 °C, and polished rolls are used to minimize surface haze on stock between 0.35 mm and 0.80 mm. Thermoforming uses a sheet surface temperature of 90 °C to 110 °C, plug temperature of 85 °C to 95 °C, and mold temperature of 35 °C to 50 °C; draw ratios should remain below 2.0:1 for uninterrupted PLA sheet. Finished articles include vented produce clamshells, bakery containers, deli trays, and low-temperature cup lids. Food-contact compliance under EU Regulation (EU) No 10/2011 requires overall migration below 10 mg/dm², and U.S. applications rely on the supplier’s Food Contact Notification clearance; industrial composting claims are verified against EN 13432 or ASTM D6400. The material is not suitable for hot-fill, retort, or microwave service above 60 °C.

What Limits Cold-Chain Dairy Cup and Portion-Pack Forming?

At 2 °C to 6 °C, unmodified PLA sheet enters a brittle regime for dairy cups and snap-fit portion lids, and flange cracks propagate during filling-line capping if the thermoformed lip radius is below 1.5 mm. Notched Izod impact measured under ISO 180 at 23 °C for sheet-extrusion PLA grades typically falls between 2 kJ/m² and 4 kJ/m²; this value drops further at refrigeration temperatures, so cold-chain converters often add an impact-modifier masterbatch at 3 wt% to 8 wt%. Loadings above 10 wt% generate visible haze and can invalidate industrial compostability certification under EN 13432 when the modifier backbone is not biodegradable within 180 days. For dairy lids, a three-layer A/B/A coextrusion structure places 20 wt% to 30 wt% clean post-industrial regrind in the core; the skin layers remain 8% to 12% of total sheet thickness to preserve surface gloss and food-contact compliance. The sheet surface temperature before plug-assisted pressure forming is held at 95 °C to 105 °C, mold temperature at 40 °C to 55 °C, and forming pressure at 0.4 MPa to 0.6 MPa. Finished products are cold-fill yogurt cups, dessert cups, and lid stock for dairy tubs; they are not suitable for hot-fill above 60 °C or for steam sterilization. Regulatory documentation for dairy applications relies on EU 10/2011 aqueous food simulant testing and the supplier’s FDA Food Contact Notification; converters verify organoleptic neutrality under the finished-food packer’s sensory protocol because low-molecular-weight residuals can migrate into dairy emulsions.

The compliance matrix across the downstream segments is as follows:

Unlike food-contact packaging, horticultural propagation trays produced from Revode 110 are selected for stiffness, soil-contact durability, and industrial compostability rather than low migration. Trays are pressure formed from sheet between 0.5 mm and 1.5 mm. To raise flexural modulus for multi-cell propagation trays, mineral fillers such as talc or calcium carbonate are added at 5 wt% to 15 wt%; the trade-off is a measurable drop in notched impact and increased opacity. The sheet is extruded in the same melt temperature window as clear packaging but uses a textured roll surface to hide filler-induced surface defects. Thermoforming tooling for propagation trays uses deeper draw pockets, and the draw ratio must not exceed 2.5:1 when filler is present because filler particles initiate microvoids in corners. Processing trials show that sheet moisture above 300 ppm causes pinholes near the cell bottom during forming. Finished articles include plug trays, nursery pots, and transport trays for vegetable seedlings. Compliance is governed by REACH for substances of very high concern and, if compostability is claimed, by EN 13432; food-contact clearance under EU 10/2011 is not required for these non-food articles. The material is not intended for long-term outdoor weathering because hydrolytic degradation and UV embrittlement reduce service life beyond one crop cycle unless stabilizer packages are used, and such stabilizers may compromise compostability.

Consumer Goods Blister and Display Tray Forming Conditions

Non-food blisters for cosmetics, toys, and hardware use Revode 110 sheet from 0.25 mm to 0.60 mm. The forming process relies on thermal conduction from polished aluminum tooling rather than plug assistance for shallow blister cavities; mold temperature is held between 30 °C and 45 °C, and sheet surface temperature between 90 °C and 105 °C. Sealing to printed paperboard differs from PVC or PET because PLA is polar and requires a seal-lacquer system rated for polylactic acid; heat-seal dwell and temperature are set by the board coating, with typical start-up values of 0.5 s to 1.2 s and 140 °C to 160 °C. To prevent nested blisters from blocking, a slip agent such as erucamide at 0.2 wt% to 0.5 wt% and a synthetic silica antiblock at 0.1 wt% to 0.3 wt% are compounded into the sheet or added as masterbatch. Excessive slip above 0.8 wt% can reduce heat-seal bond strength and cause visible haze. Finished products include cosmetic display trays, toy blisters, flashlight clamshells, and hardware accessory inserts. REACH compliance requires SVHC content below 0.1 wt%; EU Packaging Directive 94/62/EC limits the sum of lead, cadmium, mercury, and hexavalent chromium to 100 ppm by weight. Published data for this specific configuration is limited for long-term stress crack resistance under high humidity; therefore, secondary packaging should avoid sustained compression above PLA’s glass transition region of approximately 55 °C to 60 °C.

When Hinged Retail Containers Are Produced Without Post-Form Annealing

For hinged clear retail containers produced from Revode 110, creasing and folding replace a true living hinge because unmodified PLA exhibits brittle fracture after repeated flexing below 25 °C. If a living hinge is required, the formulation must include a flexible bio-based or biodegradable copolyester at 5 wt% to 15 wt%; this reduces clarity and may require migration and compostability revalidation. The sheet is extruded at 0.4 mm to 0.8 mm and formed on shuttle or steel-rule-die equipment with sheet surface temperatures of 80 °C to 95 °C to avoid tearing at fold lines. Post-form annealing is deliberately avoided for transparent retail containers because holding formed clear PLA at 65 °C to 80 °C encourages spherulitic haze and dimensional warpage. Finished articles include clear gift boxes, display cubes, jewelry trays, and point-of-sale trays. Compliance is non-food; REACH and general packaging regulations apply, and if the container is marketed as compostable, the entire assembly—including adhesives and paperboard—must meet EN 13432. The operational boundary is strict: these containers cannot be stacked in hot warehouses above 50 °C because wall deflections exceed visual tolerance.

Because cup lids are trimmed at high speed after pressure forming, sheet gauge control across the web must be held within ±0.02 mm to prevent plug-assist binding and rim-curl cracking. Food-service cold cup lids from Revode 110 are produced from 0.25 mm to 0.50 mm sheet, while cold drink cups use 0.50 mm to 0.70 mm sheet. The thermoforming line runs at 25 to 40 cycles/min; the sheet surface temperature is set at 100 °C to 115 °C and the rim-curl station requires a core sheet temperature above 95 °C. When sheet moisture exceeds 300 ppm or when the center of the web is below 90 °C, edge cracking appears as micro-tears in the curled rim. Finished products are cold drink cups, strawless lids, and sampler portion cups. Food-contact compliance follows EU (EU) No 10/2011 with overall migration below 10 mg/dm² and the supplier’s FDA Food Contact Notification. The product is limited to cold service; filling with liquids above 50 °C deforms the cup rim and eliminates lid seal.