Polyester

We have known that polyester is often use in garment industry to make cloth, but polyester here just to talk about the resin of polyester itself. Polyester resin can use as adhesives. Polyester resin have not so far found wide applications, that is if we exclude the laminating use of the unsaturated polyester as being a non adhesive application.

Polyester resin can be divided into two kind of chemical classes, saturated and unsaturated polyester. Saturated resin can be modified with saturated fatty acids from drying oils, called non-drying alkyds, and those modified by unsaturated fatty acids from drying oils, known as semi drying or drying alkyds.

On the other hand, the term of "polyester resin," especially in a molding or laminating context, generally implies on unsaturated polyester, prepared from glycol and dibasic acids or anhydride present as a major constituent.