Cast Nylon Film
Cast Nylon (CPA) film for thermoforming and vacuum packaging, offering toughness, puncture resistance, oxygen barrier, and lamination-ready clarity.
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Deep-draw thermoformability for bottom webs and shaped packs
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Superior puncture/impact resistance; ideal for bone-in and sharp-edge products
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Medium-to-high oxygen & aroma barrier; metallizable or coex with EVOH when needed
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High brilliance and transparency; printable and dimensionally stable in laminates
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Lamination-ready surfaces; bonds well to PE/PP for sealability and retort structures
Cast Nylon Film Description
What Is Cast Nylon Film (CPA)?
Cast nylon film—often abbreviated as CPA—is a non-oriented Polyamide-6 film produced via a cast (quench) process. Unlike biaxially oriented nylon (BOPA), CPA is not stretched in MD/TD, preserving exceptional thermoformability while still delivering strong oxygen/aroma barrier and puncture resistance.
Typical monolayer CPA gauges range from ~19–125 μm, while co-extruded PA-based thermoforming films for bottom webs can reach ~55–350 μm depending on draw depth and barrier targets.
For enhanced sealability and high-temperature performance, CPA is commonly laminated or co-extruded with PE/PP and, when needed, EVOH for elevated barrier.
Why Converters Choose CloudFilm
CloudFilm supplies specification-driven CPA films designed for forming, vacuum, and MAP applications. We focus on flatness, gauge control, and roll geometry to minimize web breaks and maintain registration at high line speeds.
Our films are corona-treated for reliable ink/adhesive anchorage and can be tailored for metallization when ultra-high barrier is required.
Available services include custom gauges/widths, precision slitting, and application-matched slip/COF targets to support downstream forming and sealing.
Structures & Processes That Work
CPA integrates smoothly into PA/PE, PA/EVOH/PE, or PA/PP laminates, enabling vacuum pouches, deep-draw bottom webs, and retortable packs (after line validation).
Printers benefit from clarity and brilliance that elevate shelf appeal, while packers value CPA’s impact and puncture toughness for bone-in meats and sharp-edge products.
If barrier needs escalate, consider metallized CPA or a PA-EVOH-PE coex to hit oxygen ingress targets.
Quality, Compliance & Service
Food-contact grades are available. CloudFilm supports documentation (COA/COC; third-party migration tests on request) and traceable QA from resin selection through casting and slitting.
Share your product, forming depth, sealing layer, and shelf-life goals—we’ll propose data-backed structures, pilot sample rolls, and clear MOQ/lead-time to de-risk your trial-to-scale journey.
Start with Cast Nylon Film to build a pack that protects product quality and brand image.
Get Free Sample of Cast Nylon Film
Ready to see how CPA behaves on your own thermoforming or vacuum line? CloudFilm can prepare cast nylon (CPA) trial rolls tailored to your project.
Tell us your forming depth, target structure (for example PA/PE, PE PA PE or PA/PP), desired thickness range and oxygen-barrier level. We will recommend suitable CPA grades, send trial rolls, and confirm MOQ and lead time with a clear quotation.
If you are still comparing nylon with other materials, you can also refer to our article Understanding Nylon Film Properties on CloudFilm’s website for more background.
Cast Nylon Film Applications
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Thermoforming Bottom Webs – Deep-draw, tough forming films for MAP and vacuum packs.
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Vacuum Pouches – Laminated PA/PE structures for meats, cheese, and seafood.
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Bone-In & Sharp-Edge Products – Extra puncture resistance preserves seal integrity.
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Retortable Laminates (PA/PP) – For high-temperature sterilization when validated.
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Industrial Protection – Durable barrier film for hardware, chemicals, and tools.
FAQ
No. Cast nylon (CPA) is not normally used as a direct heat-seal layer. In most flexible packaging structures, CPA must be laminated or co-extruded with PE, PP or CPE to provide sealability. For example, common structures include PA/PE, PE PA PE or CPA/PP where the polyolefin layer is the sealing side.
Compared with BOPA film, CPA is non-oriented, so it offers much better thermoformability and impact toughness, but slightly lower stiffness and oxygen barrier. BOPA is preferred when you need higher stiffness and the highest barrier at a given thickness, while CPA is preferred for deep-draw bottom webs and packs with sharp or bone-in products.
Compared with PE PA PE co-extruded film, CPA is a nylon layer that you can combine more flexibly with different seal layers (PE, PP, CPE). PE PA PE film integrates nylons and PE in a fixed co-extruded structure and is ideal when you want a ready-to-use high-barrier forming film. See BOPA Film
and PE PA PE Film
on our website for more details.
Cast nylon film is mainly used in thermoforming bottom webs, vacuum pouches and high-barrier laminates for: fresh and frozen meat, bone-in cuts, sausages, cheese, seafood, ready meals and high-value industrial components. Whenever you need a deep-draw forming film with strong puncture resistance and medium-to-high oxygen barrier, CPA is often a good starting point.
As a general guideline, CloudFilm typically supplies monolayer CPA in the ~19–125 μm range, while PA-based thermoforming bottom webs can reach roughly 55–350 μm total thickness depending on draw depth and barrier targets.
- For medium-depth forming or standard vacuum pouches, 60–120 μm total thickness is common.
- For deep-draw packs with bone-in meat or large pieces, thicker structures are often required.
Standard widths cover typical thermoforming and vacuum lines, and we can slit to your exact width and core (3″ or 6″). If you share your existing structure or a competitor spec, we can match or optimize the thickness and width for your equipment.
Yes, CPA can be used in retortable laminates when it is combined with suitable PP or aluminum-based structures, and when the full construction (films, inks, adhesives, seal layer) is validated on your process. Typical examples include PA/PP, PA/AL/PP or PA/PP/CPP structures.
Before commercial production, we strongly recommend line trials to confirm seal strength, dimensional stability and organoleptic performance at your retort temperature and time.
To reach higher barrier levels, CloudFilm CPA is often combined in:
- PA/PE or PA/PE/PE – For many vacuum and deep-freeze applications; see PA/PE Film.
- PE PA PE or PA/EVOH/PE – For very demanding shelf-life targets where EVOH or co-extruded structures provide ultra-low OTR while CPA supports deep draw.
- Metallized CPA laminates – Where a metal layer is required for maximum oxygen and aroma barrier, especially in dry or powdered products.
For a comparison between nylon and EVOH, you can also refer to CloudFilm’s article Difference Between Nylon and EVOH.
Typical MOQ for CloudFilm cast nylon or PA-based films starts from around 1–2 tons per structure or thickness, depending on specification and color. Lead time is influenced by structure, thickness, slit width and shipping plan, but we can usually arrange smaller trial rolls faster for testing and then move to regular production once the structure is approved.
To prepare an accurate offer or sample proposal for cast nylon film, it is very helpful if you can share:
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Product to be packed (e.g. bone-in beef, cheese, salmon, hardware)
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Packaging format (thermoforming bottom web, vacuum pouch, retort pouch, etc.)
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Current or target structure (if any)
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Required thickness range and forming depth
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Processing conditions (vacuum, deep-freeze, retort temperature/time)
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Any current problems (leakers, pinholes, poor shelf life, etc.)
With this information, CloudFilm can quickly recommend a CPA-based structure, trial roll size and a quotation tailored to your line.
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