Polipropilene Superstiro Calandrato Release Film for Manufacturing Composites
Release High Tech Films used for the Manufacturing of Composites
Polipropilene Superstiro Calandrato Film 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
Launched in the market in september 2003 also Polipropilene Superstiro Calandrato (heavy matt) comes from the company’s research on materials, constantly focused to get films to achieve innovative solutions for composites. This film has been designed for the production of composite materials made with epoxy and polyester resins and with glass, carbon and arammidic fibers.
Peculiar of Polipropilene Superstiro Calandrato is to get an heavy matt (satinated) surface on composite (much more matt than Polipropilene Satinato).
This film can be used in many production methods. It is used both with the roto-translaction process (to manufacture tubolar composites with a circular or elliptical section, and with a conical or slightly conical structure), in manual taping (to get complex or irregular shaped items), and in moulding (to produce both flat panels and complex forms).
General Features of Polipropilene Superstiro Calandrato in the Manufacturing of Composites
Polipropilene Superstiro Calandrato 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. 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 Superstiro Calandrato 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.
The Special Heavy Matt Surface
Used in direct contact with the resin an heavy matt 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 give the heavy matt finish to the composite’s surface. 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. Here too an heavy matt (satinated) surface is obtained. The film is somehow ductile and fits well also with complex or irregular 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 80 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: Seven functions fullfilled by high tech films in the manufacturing of tubolar 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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