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Copolyester forms when modifications are made to polyesters, which are combinations of diacids and diols. For example, by introducing other diacids, such as isophthalic acid (IPA), or other diols, such as cyclohexane dimethanol (CHDM) to the polyester polyethylene terephthalate (PET), the material becomes a copolyester due to its comonomer content.〔''Copolyester – A Versatile Choice for Medical Applications'' Thijs Jaarsma. 2004. Business Briefing: Medical Device Manufacturing & Technology.〕 Copolyesters retain their strength, clarity, and other mechanical properties even when exposed to a variety of chemicals that typically affect other materials, such as polycarbonates. This, plus their versatility and flexibility, allows manufacturers to use them effectively in the design of both high-volume, low-cost parts as well as critical, more expensive component parts. ==Applications== Copolyesters offer versatility to meet a wide variety of applications.〔 Copolyester resins have proved to be effective in packaging applications, due to their toughness, versatility and chemical resistance. They are also frequently used in the manufacture and packaging of consumer goods and materials. Markets that rely on copolyesters include medical and medical packaging, home appliances, consumer goods (pens, toys, sporting goods, etc.), and cosmetics, among others.,〔(Eastman - EASTAR copolyester - Introduction )〕〔(Eastman - EASTAR copolyester - Product List )〕〔http://www.bostik-us.com/our-brands/vitel/default.html〕〔http://www.dynapol.com/product/dynapol/en/products-services/dynapol-types/dynapol-series/pages/default.asp〕 Table of Common Copolyester and Components 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「copolyester」の詳細全文を読む スポンサード リンク
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