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PCTG
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食品接触级 美国伊士曼 PCTG Eastar DN011 低收缩性 婴儿用品应用
食品接触级 美国伊士曼 PCTG Eastar DN011 低收缩性 婴儿用品应用
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非晶型共聚酯

食品接触级 美国伊士曼 PCTG Eastar DN011 低收缩性 婴儿用品应用
产品说明: Eastar™ Copolyester DN011 is a brilliantly clear polymer having excellent impact strength, chemical resistance, and low shrinkage rates. Eastar™ Copolyester DN011 contains a mold release. This product has been GREENGUARD INDOOR AIR QUALITY CERTIFIED®. The GREENGUARD INDOOR AIR QUALITY CERTIFIED® Mark is a registered certification mark used under license through the GREENGUARD Environmental Institute (GEI). GEI is an industry-independent, non-profit organization that oversees the GREENGUARD Certification Program. The GREENGUARD Certification Program is an industry independent, third-party testing program for low-emitting products and materials for indoor environments. For more information about GEI and to obtain printable certificates for Eastman™ Copolyesters, visit www.greenguard.org. Choose Eastman Chemical Company under the Manufacturer category and click search to display a list of our products. This product has been CRADLE TO CRADLE CERTIFIED(cm) The CRADLE TO CRADLE CERTIFIED(cm) Mark is a registered certification mark used under license through McDonough Braungart Design Chemistry (MBDC). MBDC is a global sustainability consulting and product certification firm. The CRADLE TO CRADLE® framework moves beyond the traditional goal of reducing the negative impacts of commerce (‘eco-efficiency'), to a new paradigm of increasing its positive impacts (‘eco-effectiveness'). At its core, Cradle to Cradle design perceives the safe and productive processes of nature's ‘biological metabolism' as a model for developing a ‘technical metabolism' flow of industrial materials. Product components can be designed for continuous recovery and reutilization as biological and technical nutrients within these metabolisms. For more information about MBDC and to obtain printable certificates for Eastman Copolyesters, visit http://www.mbdc.com.

Content

PCTG 一种透明塑料,是一种非晶型共聚酯,PCTG常用的共聚单体为1,4-环己烷二甲醇(CHDM),全称为聚对苯二甲酸乙二醇-1,4-环己烷二甲醇酯[Poly(1,4-Cyclohexylene Dimethylene Terephthalate Glycol)]。它是由对苯二甲酸(PTA)、乙二醇(EG)和1,4-环己烷二甲醇(CHDM)三种单体用酯交换法缩聚的产物,与PET比较多了1,4-环己烷二甲醇共聚单体,与PCT比多了乙二醇共聚单体,因此,PCTG的性能和PET、PCT大不相同。 PCTG是一种非结晶型共聚聚酯,随着共聚物中CHDM的增加,熔点下降,玻璃化温度上升,结晶度下降,最后形成无定形聚合物。PCTG中CHDM的含量大于50%。