Polyester resins polyester is often referred to as fiberglass which is not technically accurate. Fiberglass is reinforcement and polyester is the resin. Polyesters offer ease of handling, low cost, dimensional stability, as well as good mechanical, chemical-resistance and electrical properties. Polyester resins are the least expensive of the resin options, providing the most economical way to incorporate resin, filler and reinforcement. They are the primary resin matrix used in smc (sheet molding compounds) and bmc (bulk molding compounds).
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Polyester Resins. Polyester is often referred to as fiberglass – which is not technically accurate. Fiberglass is reinforcement and polyester is the resin. Polyesters offer ease of handling, low cost, dimensional stability, as well as good mechanical, chemical-resistance and electrical properties.
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