Nylon (PA) Vacuum Thermoforming Film — Forming and Sealing Webs for Food

It is a co-extruded nylon/PE (NY/PE) film for continuous automatic vacuum thermoforming — the process where a bottom web is heated and formed into a cavity that holds the product, then sealed under vacuum to a top web. It is used to vacuum-pack fresh and processed proteins: beef, chicken, pork, seafood, ham, sausage, bacon, and duck. The nylon layer supplies formability, toughness, and pinhole resistance; laminated with PET or OPP it completes a full vacuum bag.

The NL series (NY/PE) is for standard ambient, chilled, and frozen vacuum packaging. The NY/RCPP series (F2235, F2237) adds a retort CPP sealant layer so a formed pack can undergo high-temperature retort sterilization and sous-vide cooking — capabilities standard NL film is not designed for. Choose NL for cold-chain vacuum packs; choose NY/RCPP when the pack will be thermally sterilized or sous-vide cooked.

The NL series scales from a sealing film up to deep-draw forming webs: F2646 (NL #50, 50μm, sealing/top web, haze 4%); F2624 (NL #80, 80μm, 10–15mm, 5.7%); F2615 (NL #120, 120μm, 10–30mm, 10%); F2606 (NL #150, 150μm, 40–50mm, 12.5%); F2647 (NL #180, 180μm, 60–70mm, 15%); 15309 (NL #262, 262μm, 60–100mm, 20%). The NY/RCPP grades are F2235 (135μm, 30–50mm) and F2237 (150μm, 30–50mm), haze on request. Width and length are customized; deeper cavities need heavier gauges.

F2646 (50μm) is a sealing film — a top web with no forming depth, run against a formed bottom web. The 80–262μm NL grades and both NY/RCPP grades are forming (bottom) webs, each carrying a recommended forming depth. If you need a formed cavity, start at F2624 (80μm, 10–15mm); if you need a clear top web, F2646 is the choice.

A forming web is stretched into a cavity; poor formability thins or cracks the film and produces pinholes that break the vacuum. Intlpak's nylon films are engineered for best formability and resistance to twists without pinholes. Clarity trades off with gauge: haze rises from 4% at 50μm to 20% at 262μm, so the thin grades read clearest at retail and the thick grades prioritize deep-draw strength.

Machine-direction break strength is already high at low gauge: F2646 (50μm) breaks around 450/380 kg/cm² and F2624 (80μm) around 460/470 — effectively level in MD. Added gauge mainly buys cross-direction tear resistance, deeper draw capability, and cavity rigidity rather than a big jump in MD strength. Elongation rises with gauge (F2646 ~370/440% up to F2647 ~620/600%), so heavier grades tolerate deeper forming.

The nylon layer gives good gas barrier and toughness, but for a high oxygen barrier the film is laminated with PET or OPP (or paired with an EVOH structure). Intlpak does not publish an OTR figure for this line — it is a formability/clarity/toughness play, with barrier completed in the laminate. For a defined oxygen barrier, ask about the NY/EVOH barrier film or an EVOH lamination.

They carry an RCPP (retort cast polypropylene) sealant layer developed for retort service, so a formed and sealed pack can go directly into high-temperature retort sterilization — and is also suitable for sous-vide cooking — while still serving ambient, chilled, and frozen distribution. Both form at 30–50mm. Standard NL film cannot take retort; the NY/RCPP grades F2235 and F2237 are the ones that can.

Both form 30–50mm; the difference is material margin and rigidity, not extra depth. F2235 is 135μm; F2237 is 150μm for heavier contents, sharper product geometry, or where the tray must hold its shape. For ordinary prepared foods, F2235 does the job at lower material cost.

Usually no. Chilled or frozen vacuum packs need no retort layer, and a standard nylon grade such as F2606 (150μm, 40–50mm) costs less and reads clearer. The value of NY/RCPP is the ability to sterilize or sous-vide after forming — if you never do, there's no reason to pay for it.

Vacuum packs of fresh and processed protein: beef, pork, chicken, seafood, plus ham, sausage, bacon, and duck, across ambient (retort), refrigerated, and frozen distribution. The NY/RCPP grades extend this to retort ready meals and sous-vide dishes. The film's toughness resists punctures from bone-in or sharp products and helps protect against freezer burn.

They share the nylon forming technology but are a different line. The Food Package nylon films (F2624, etc., no "-M") are optimized for food vacuum packaging; the Medical Care Package nylon films (F2624-M, etc.) are specified for E.O./gamma-sterilizable medical device trays. Match the line to your application.

A forming film is thermoformed inline into a custom cavity on a TFFS machine — efficient at volume and for product-shaped cavities. A pre-made pouch is a ready bag for low volumes or irregular items. This line is the forming/sealing rollstock route for automatic vacuum lines.

NY/PE (this line) delivers toughness, formability, and a good gas barrier for typical vacuum shelf life. When you need a defined high oxygen barrier for long MAP shelf life, step up to the NY/EVOH barrier film, which adds an EVOH core. The choice is driven by required shelf life and whether you're running MAP.

Intlpak is an ISO 9001 certified manufacturer operating GMP clean-room production with automatic foreign-object detection and thickness control, and holds ISO 22000 and HACCP food-safety certification, with annual product safety checks — supporting these as food grade, food-contact-safe films.

They are produced as food-safety-compliant films and are inherently BPA free (BPA relates to polycarbonate/epoxy chemistry, not nylon or PE). For FDA declarations, migration reports, or SGS certificates for your specific use, contact Intlpak. For export markets, Intlpak (active at ProPak Asia, FOODEX Japan, Taipei Pack) can advise on EU 10/2011, Japan food sanitation act, and China GB 4806 documentation.

Intlpak is a Taiwan thermoforming film manufacturer and co-extrusion film manufacturer — the actual maker, not a trader — offering direct technical support on gauge and forming depth selection. It supports OEM/ODM with custom width and gauge to your machine, cavity depth, and slitting spec, plus rollstock supply and wholesale.

MOQ typically starts around 500–1,000 kg per grade and is confirmed per project by gauge, width, and volume. Send a sample request via the contact form or Intlpak@intlpak.com.tw with your machine, product, and forming depth. Store rolls away from direct light, wind, and rain, protected from impact and contamination, to preserve forming and sealing performance.