原料PCTG TX1501HF伊士曼--- copolyester TX1501HF is a high flowgrade of Eastman Tritan™. Eastman Tritan™ copolyester TX1501HF hasviscosity reductions of 40-50% relative to Eastman Tritan™copolyester TX1001. Eastman Tritan™ copolyester TX1501HF contains amold release derived from vegetable based sources. Otheroutstanding features include good toughness, hydrolytic stability,and heat and chemical resistance. Eastman Tritan™ copolyesterTX1501HF may be used in repeated use food contact articles underUnited States Food and Drug Administration (FDA) regulations.Eastman Tritan™ copolyester TX1501HF is certified to NSF/ANSIStandard 51 for Food E Materials and is also certified toNSF/ANSI Standard 61 - Drinking Water System Components-HealthEffects.
PETG PCTGPCTA的相同性与区别如下：
一，同属于聚酯系列，中文常用名：聚对苯二甲酸乙二醇酯，塑料行业中通常区分或叫法：
PET ：常温或高温PET，PET切片，聚酯切片,熔点250C左右，均聚为透明状颗粒，共聚为乳白色颗粒
PETG,PCTG,PCTA:改性PET或低温PET，共聚聚酯，共聚多酯，熔点180C左右，共聚物，透明状颗粒
二，组成
PET=PTA(对苯二甲酸)+EG(乙二醇)
PETG=PTA(对苯二甲酸)+EG(乙二醇)+<50%CHDM(1,4-环己烷二甲醇)
PCTG=PTA(对苯二甲酸)+EG(乙二醇)+>5O%CHDM(1,4-环己烷二甲醇)
PCTA=PTA(对苯二甲酸)+EG(乙二醇)+30%醋酸酯
由以上组成成分不难看出，PETG/PCTG是由PET经过醇改性而来，当醇含量小于50%时，形成PETG，当醇含量大于50%时，就形成PCTG。随着CHDM醇含量的增加，熔点下降，玻璃化转化温上升，结晶度下降，随之树脂硬度下降，耐热性上升，zui后形成无定形透明状
The similarities and differences of PETG pctg PCTA are asfollows:
1、 It belongs to polyester series, commonly used in ChineseName: polyethylene terephthalate, which is usually distinguished orcalled in plastic industry
Pet: room temperature or high temperature pet, PET chip, PETchip, melting point about 250C, all polymerized into transparentparticles, copolymerized into milky white particles
PETG, pctg, PCTA: modified PET or low temperature pet,copolyester, copolyester, melting point about 180C, copolymer,transparent particles
2、 Composition
Pet = PTA (terephthalic acid) + eg (ethylene glycol)
PETG = PTA (terephthalic acid) + eg (ethylene glycol) + < 50%CHDM (1,4-cyclohexanedimethanol)
Pctg = PTA (terephthalic acid) + eg (ethylene glycol) + > 5O%CHDM (1,4-cyclohexanedimethanol)
PCTA = PTA (terephthalic acid) + eg (ethylene glycol) + 30%acetate
It is not difficult to see from the above composition that PETG/ pctg is made from pet modified by alcohol. When the alcoholcontent is less than 50%, PETG is formed. When the alcohol contentis more than 50%, pctg is formed. With the increase of the contentof CHDM alcohol, the melting point decreased, the glass transitiontemperature increased, the crystallinity decreased, the hardness ofthe resin decreased, the heat resistance increased, and finally theamorphous transparent was formed
