Sheet metal refers to a semi-product of smooth flat metal rolled from a slab, and its length and width are far greater than its thickness.
Glasses plastic sheet is also called: Cellulose acetate plastic sheet glasses (English is Cellulose acetate plastic sheet glasses)!
The first thing to know is what is acetate? Acetate fiber is the second largest variety of regenerated cellulose fiber after viscose fiber. Acetate cellulose is made by acetic acid of cellulose (wood pulp or cotton pulp) with anhydrous acetic acid (acetic anhydride) to produce cellulose triacetate. The cellulose triacetate is dissolved in dichloromethane to obtain triacetate. Acetate cellulose (including long and short filaments); cellulose triacetate can also be hydrolyzed to generate cellulose diacetate, and then this cellulose is dissolved in acetone solvent for spinning, and cellulose diacetate (including long, Short filament, diacetate fiber is customarily called acetate filament or short filament), and acetate tow for cigarettes can also be produced. Acetate fiber takes cellulose as the basic skeleton and has the basic characteristics of cellulose. Because of its low moisture regain, it has certain characteristics of synthetic fiber because of its low moisture regain. It is called semi-synthetic fiber. The properties of cellulose diacetate and cellulose triacetate are basically similar. The dry strength of cellulose triacetate is slightly lower, the melting point is slightly higher, and the moisture absorption rate is lower. Acetate fiber has three series: acetate tow, acetate staple fiber, and acetate filament.