Pulp Lamination Film FAQ

It is a food-contact lamination film bonded onto a molded plant-fiber (pulp) container to give the fiber the functional properties plastic normally provides — heat resistance, oil and moisture barrier, and a safe food-contact surface — while keeping the container mostly fiber. The flagship TPX-PP grades make a pulp container fully dual-ovenable (microwave and conventional oven) up to 160°C and cut plastic usage by up to 85% versus a conventional plastic tray.

TPX (poly-4-methylpentene) is a specialty resin prized for clarity, low density, and heat resistance to 160°C. Co-extruded with PP as the food-contact layer, it improves thermal stability and, critically, blocks additive and microplastic migration into high-heat, high-fat foods — the pairing most likely to drive migration. Laminating a thin TPX-PP layer onto a plant-fiber base yields a container that performs like plastic but is ~90% fiber.

TPX-PP: F4408 (35μm, lightest, heat/plastic figures pending), F4407 (50μm, dual-ovenable to 160°C, up to 85% plastic cut), F4403 (70μm, heaviest, dual-ovenable, retort-ready, up to 85% cut). PP/PE: F3131 (43μm, grease/water resistant disposable, data pending) and F3137 (70μm, heavier grade, data pending). Width and length are customized. The TPX-PP grades carry the documented heat/plastic-reduction and FDA/SGS claims; the PP/PE grades are newly listed with mechanical data on request.

Different objectives. TPX-PP targets molded-fiber containers needing dual-ovenable heat resistance (to 160°C), FDA anti-migration performance, and up to 85% plastic reduction — an ESG-driven upgrade. PP/PE (F3131/F3137) targets ordinary disposable food containers needing grease and water resistance and microwave readiness, without the oven-grade or plastic-reduction claims. If your goal is a plastic-reduction target with oven capability, TPX-PP is the relevant line.

It is for the finished laminate on a molded-fiber container. F4407 is specified as microwave- and oven-safe up to 160°C; F4403 is specified as dual-ovenable, but its own page does not publish a separate temperature figure — F4407's 160°C is cited only as a same-family indication of the range. Real performance depends on lamination quality, the fiber substrate, and heating time, so validate with your actual container and heating profile — temperature, duration, fat content — rather than inferring from the film specification alone.

By blocking migration. The food-contact surface is an FDA-approved food-grade TPX co-extrusion intended to suppress additive and microplastic migration into food under high heat and high fat — exactly the conditions of reheating an oily meal. That anti-migration behavior is the principal difference between this family and ordinary PP-coated paper containers.

Against a conventional all-plastic tray. When the container body is molded plant fiber, only a thin food-contact film remains as plastic, so total plastic drops sharply — the finished TPX-PP molded fiber container in this family measures 10.75% plastic content versus 100% for a conventional PP container. The exact ratio varies with container size and film gauge.

Yes. The PP food-contact layer provides a strong oil and grease barrier and resists heat and moisture with minimal additives, so containers hold high-oil, high-sauce meals without softening or leaking. The PP/PE grades (F3131/F3137) are specified specifically for grease- and water-resistance in disposable containers.

The TPX-PP grades suit ready-to-eat and fresh convenience meals, frozen-to-oven entrees, and premium takeout and catering — especially high-fat dishes, curries, bento meals, and bakery products that need oven reheating. The PP/PE grades suit everyday disposable takeout boxes, microwave-ready meal trays, fried and oily foods, and grease-resistant bakery packaging.

Container converters buy the film to laminate onto molded-fiber or paperboard containers. Brands and foodservice operators who want the finished result — without running their own fiber line — can instead adopt Intlpak's finished TPX-PP Laminated Molded Fiber Container (TPX-MFC). The film is the raw material; the container is the finished product.

PE-coated paper is microwave-tolerant but softens or degrades at oven temperatures and offers no special anti-migration protection. The TPX-PP laminate is dual-ovenable to 160°C and uses an FDA-approved TPX food-contact layer engineered to block migration under high heat and fat — a meaningfully higher-performance, oven-capable, food-safety-focused option.

Container specification and cost decide. F4403 (70μm) gives a heavier film layer for larger, heavier, or high-fat meals, and is retort-ready; F4407 (50μm) is sufficient for most standard tray sizes and uses less material. For maximum light-weighting, F4408 (35μm) exists but its heat and plastic-reduction figures are not yet published.

A TPX-PP laminated molded fiber container keeps the functionality of a plastic tray — leak-proof, oil-resistant, oven-safe — while cutting plastic content to ~10.75%, supporting ESG and plastic-reduction goals and single-use-plastic regulations. Cans and rigid plastic win only on tradition; the fiber container is lighter-footprint with comparable performance.

The films are manufactured under ISO 9001, GMP clean-room production, and ISO 22000 & HACCP food-safety certification. The TPX-PP material is compliant with US FDA 21 CFR 177.1520(c)3.3b and 21 CFR 178.2010, and finished TPX-PP containers have passed SGS food-contact migration and extraction testing. For the PP/PE grades, request current documentation as that line is newly listed.

Intlpak is an experienced food packaging film exporter (ProPak Asia, FOODEX Japan, Taipei Pack). Tell Intlpak your destination market and they will confirm the documentation path — EU 10/2011, Japan food sanitation act, China GB 4806 — as well as relevance to single-use-plastic regulations that increasingly drive plastic-reduction packaging.

Intlpak is a Taiwan sustainable-packaging film manufacturer and co-extrusion film manufacturer — the actual maker, not a trader — with a sister company, Green Intlpak, focused on plant-fiber packaging. It supports OEM/ODM with custom width and gauge for your container line and lamination process.

MOQ typically starts around 500–1,000 kg per grade and is confirmed per project. Send a sample request via the contact form or Intlpak@intlpak.com.tw with your container type, heating requirements, and food application. Store rolls away from direct light, wind, and rain, protected from impact and contamination.