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No, PE is an abbreviation for polyethylene. The abbreviation for polyester (polyethylene terephthalate) is PET.
Fibreglass resin is a polyester.
Everything is essentially biodegradable. Cotton with polyester blended in, or polyester alone will take longer to biodegrade than 100% cotton, for example.
what is the main difference between polyethylene and polyesters what is the main difference between polyethylene and polyesters
yes it is what you say
Reinforcing the polyester with fiberglass.
Polyethylene terephthalate (PET) fits the definition of a polyester so the name is redundant. I think PETP is simply an old abbreviation for PET.
Though I haven't used either of these myself but EVA- reinforced polyester will be the better option
Polyethylene
Yes, I can! A GRP (Glass Reinforced Polyester) door is easily painted in the same way a fiberglass door is painted. You can successfully paint a GRP door too by following the instructions in the related link.
Polyester resin is a thermosetting resin, generally a copolymer
Mylar is a British trade name for BoPET(Biaxially-oriented polyethylene terephthalate) a strong polyester film used in packaging, insulation and many other applications.