One Response for "What is a sunglass plastic frame made out of?"

1. Ted H August 30th, 2008 at 11:09 am 1

   Cellulose acetate (zylonite): The most commonly used plastic in eyeglass frames, cellulose acetate is relatively inexpensive, easy to work with, and comes in a wide variety of colors, textures, and patterns. The material is easily adjusted but tends to get brittle with age.

   The foregoing eyeglass frame front member is manufactured by the method which comprises:
   (a) superimposing a first thermoplastic resin sheet upon a second thermoplastic sheet with a reinforcement element disposed therebetween, the adjacent surfaces of said sheets being in substantial contact with each other;

   (b) applying a pressure force to the outer surfaces of said first and second thermoplastic sheets in a direction which is transverse to the lengths thereof to force said sheets toward one another with said reinforcements element disposed therebetween; and

   (c) apply a motion to one of said thermoplastic sheets relative to the other while said sheets are under pressure thereby creating frictional heat sufficient to melt the thermoplastic resin at the interface of the two sheets such that upon cooling of the sheets to below the melt temperature of the molten thermoplastic resin, there will be provided a monolithic one piece front member suitable for finishing into a corresponding monolithic reinforced eyeglass frame front member.

   Most of the manufacturing companies are in China, and their websites are difficult to understand…