Transparent, low-flammability, UV-resistant film made from a crystallizable thermoplastic, its use and process for its production

US7138176B2 · kind B2 · utility

Assignee

• Mitsubishi Polyester Film GmbH · US

Inventors

• Ursula Murschall · Nierstein, DE
• Ulrich Kern · Ingelheim am Rhein, DE
• Guenther Crass · Taunusstein, DE
• Andreas Stopp · Ingelheim am Rhein, DE

Key dates

• Filing date: Jan 12, 2001
• Grant date: Nov 21, 2006
• Expiry date: Jan 12, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a transparent, low-flammability, UV-resistant, oriented film made from a crystallizable thermoplastic and having a thickness of from 5 to 300 μm. The film comprises at least one UV stabilizer and at least one flame retardant, and at least the flame retardant, and preferably also the UV stabilizer, is fed directly as a masterbatch to the crystallizable thermoplastic during production of the film. The film may have one or more layers, and the UV stabilizer may have been selected from the group consisting of the 2-hydroxybenzophenones, the 2-hydroxybenzotriazoles, the organonickel compounds, the salicylic esters, the cinnamic ester derivatives, the resorcinol monobenzoates, the oxanilides, the hydroxybenzoic esters, the sterically hindered amines and triazines, and the flame retardant may be an organic phosphorus compound, in particular an organic phosphorus compound soluble in polyethylene terephthalate.