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Accueil Consumables for infusion and vacuum moulding Release films

Composites

Release films

  • Release Film ETFE230
  • Release film ELA20
  • Release separator film PP40
  • PFAS-free release film

Release films for composites: resin control and optimal demolding

Release films or perforated films play a vital role in vacuum molding (both in and out of an autoclave) and infusion processes. They are used to facilitate separation between the drain fabric and the fabric and help control resin flow.

Perforated films facilitate demolding, protect the composite part, and optimize surface quality. Thanks to its expertise in composite materials, Diatex offers a wide selection of films suited to various processes, resins, and temperatures.

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General Technical Specifications

Different types of films 

Polyethylene (PE), Polypropylene (PP), polymethylpentene (PMP), ethylene tetrafluoroethylene (ETFE), fluorinated polymer, fluorinated ethylene propylene (FEP), or polytetrafluoroethylene (PTFE)

Elongation at break: 300% to 700%

Different types of perforation 

Operating temperatures: up to 315°C

Various thicknesses: from 12 μ to 50 μ

Bright colors to reduce the risk of leaving a film on the parts after demolding

Suitable for use in an oven, autoclave (high pressure), and for infusion

Matte or glossy finish

Our various types of release films

Low-temperature PE and PP films

Release films are:

  • Ideal for infusion and molding at temperatures up to 160 °C
  • For use on standard developed parts

Technical films

Designed for high-temperature applications, these films are:

  • Suitable for autoclave processes
  • Good thermal resistance
  • With or without PFAS

Very high-temperature films

Diatex also offers a range of specialty films:

  • High performance: from 260°C to 400°C
  • Excellent thermal stability
  • Outstanding demolding capability

Our line of composite release films

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Last NameHighest temp.UnpunchedPerforation P0P1 PerforationP3 PerforationType
ELA20125°CxxxxPolyethylene
ELA50125°CxxPolyethylene
PP40160°CxxxPolypropylene
PMP200200°CxxxPolymethylpentene
RF205205°CxxPFAS-Free
ETFE230230°CxxxEFTE Fluorinated Polymer
A5000260°CxxxFEP
PTFE315315°CxPTFE

PO to P3: from large to small perforation

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Frequently Asked Questions

Are the release films available in perforated versions?

Yes, Diatex offers several levels of microperforation to adjust permeability according to the impregnation process. 

What is the difference between a release film and a vacuum film?

The release film is placed between the part and the drainage layers. It facilitates demolding, while the vacuum film is used to create a seal for the vacuum system.

How do you choose the right release film?

The choice depends on:

  • the maximum process temperature,
  • the required elongation,
  • the resin used,
  • the type of process (autoclave, infusion, oven)
  • the desired level of demolding

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