Polipropilene Deformabile Release Film for Manufacturing Composites
Release High Tech Films used for the Manufacturing of Composites
Polipropilene Deformabile in Reels for the Wrapping of Tubolar Items in the Roto-Traslaction Process and in Sheets for the Moulding of Flat Panels and Complex Forms
In 2007 company’s research has got another success. Polipropilene Deformabile has been designed and launched in the market, used for the production of composite materials made with epoxy and polyester resins and with glass, carbon and arammidic fibers.
At that time the market was looking for a film with enhanced ductile and deformability capabilities and able to a cert extend the to withstand holes and tears made by the processing method. Further on the film must have very good release performances and resists to usual manufacturing temperatures.
This film is used in many production methods: in the roto-translaction process, in manual taping and in moulding. For tubolar items in particular it is possible to make holes on the tape to place inserts. In moulding complex geometrical forms and the use of moulds with cutting edges are possible.
General Features of Polipropilene Deformabile in the Manufacturing of Composite
Polipropilene Deformabile is made on our specifications, with a targeted recipe concerning the polypropylene grade and a peculiar production process which gives mechanical strength and other physical features.
This film has poor mechanical properties and a limited heat-shrinkage during the curing cycle. The film is not rigid, but ductile and thus can be deformed by tensioning or pressure also at room temperature. To get tubolar items with good structural characteristics an overwrapping with another film is compulsory.
The special formulation of the film permits to use it with medium-high temperatures of polymerization (up to 140-150 °C).
Thanks to the special chemical-physical composition Polipropilene Deformabile has release capabilities on both sides of the film. This film is not coated with laque or silicone for release purposes. In this way no transfer of coating or silicone and no contamination of the composite is possible, and there is no need to clean or sand the item after polymerization.
Used in direct contact with the resin a glossy surface of the composite is obtained. In the production of tubolar items very marked steps given by the thickness of the tape are left on the surface.
Primary Wrapping and Manual Taping
In the roto-translaction process and in manual taping it is used in reels to wrap the rod to manufacture in direct contact with the resin (primary wrapping). The main function is to exploit the deformability capabilities of the film. But it also keeps all the termosetting resin within the item during the liquid stage and guarantees an easy release at the end of polymerization.
Moulding
In moulding it is used in sheets to get flat panels or complex forms and acts as resins constraint and releaser. A glossy surface is obtained. The film is very ductile and fits well also with complex, irregular or sharp shapes of the mould. Mould’s walls are protected and don’t need to be cleaned after each cycle or to be sanded periodically.
Product Availability
The available nominal thickness is 50 micron, the nominal unit weight 41 grams per square metre, the nominal yield 24 square metres per kilogram.
Release Films and Tubolar Composite’s Features
Our films for the production of composites have outstanding performances only if they are properly used. Very important are, in particular, the wrapping of the tape and polymerization’s conditions.
On this subject a specific paper is available on request.
If you want to read something of the functions an high tech release film can do in the manufacturing to improve composites you can click here: The functions of films in manufacturing composites
For any further information on films for composites, please don’t hesitate to contact us. Our technical department is at your disposal you may need for any explanation, in-depth analysis, tests, new product or application development both for films and for the production processes of composites.
For further infomations write, phone, send an email at:
A. Peruzza srl – via Portelle 1 – 31010 Mareno di Piave – Tv – Italia
Telefono: (int+ 39) 0438 492335. Telefax: (int+ 39) 0438 492365
Email: info@aperuzza.com
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