What is a sunglass plastic frame made out of?

[harrytussy]

Hi Friends.......


And can you please tell me what the primary,
secondary and tertiary industries for the plastic frame of the sunglasses.

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[rickmeckwan]

Hello.............

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.
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[iketz0]

rick said it all.. his information is correct..