Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1995-02-01
1997-08-19
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
2642106, 26421112, 264237, 425327, B29C 4790
Patent
active
056585144
ABSTRACT:
A method for producing a thermoplastic resin sheet or film, wherein a raw resin material containing one or more of the following additives: a nucleating agent, fine powder of a high melting point polymer, a petroleum resin, a terpene resin and an organic peroxide (and/or a crystalline polypropylenic copolymer) is melted under heat to form a resin sheet or film, the resulting resin sheet or film is brought into contact with and adhered to the outer surface of a cooling roll having a mirror-finished surface or the outer surface of an endless metal belt having a mirror-finished surface and then it is moved along with the roll or the belt, thereafter it is inserted, pressed and cooled between the outer surface of the cooling roll and the outer surface of the endless metal belt. The non-oriented sheet or film thus produced has a high surface gloss, a high surface smoothness and a high transparency and is suitable for wrapping foods and medicines.
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Fujii Atsushi
Funaki Akira
Yukumoto Tohru
Idemitsu Petrochemical Co. Ltd.
Vargot Mathieu D.
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