A heat-shrinkable film is provided comprising a copolyester blend of: (a) about 1 to about 98.5 percent by weight of a PETG copolyester, (b) about 98.5 to about 1 percent by weight of a DEG modified PET copolyester having a b* value of less than 15, preferably less than 10, (c) about 0.5 to about 3 percent by weight of anti-blocking agent, and optionally, (d) about 5 to about percent by weight of a crystallizable polyester. Component (a) comprises 100 mol percent dicarboxylic acid residue component of at least 95 mol percent terephthalic acid residues and 100 mol percent diol residue component of about 65 to about 80 mol percent ethylene glycol residues and about 35 to about 20 mol percent 1,4-cyclohexanedimethanol residues. Component (b) comprises 100 mol percent dicarboxylic acid residue component, 100 mol percent diol residue component, catalyst residues and color control agent residues. The dicarboxylic acid residue component comprises at least 75 mol percent of terephthalic acid residues. The diol residue component comprises 10 to 50 mol percent diethylene glycol residue and 50 to 90 mol percent ethylene glycol residue. The catalyst residues comprise 20 to 100 ppm manganese, 50 to 300 ppm antimony, 0 to 100 ppm titanium and 40 to 150 ppm phosphorus, based on the weight of the copolyester. The color control agent residues comprises either (i) 40 to 100 ppm cobalt, (ii) 1.5 to 10 ppm of blue compounds of substituted 1,4-bis(2,6-dialylanilino) anthraquinones and 0.5 to 6 ppm of red compounds of anthraquinones and (iii) 0.5 to 10 ppm of 1-cyano-3H-dibenz[f,ij] isoquinoline-2,7-diones, all ppm based on the weight of the copolyester.
提供了一种热收缩薄膜,该薄膜由以下共聚聚酯混合物组成:(a)约 1%至约 98.5%(按重量计)的 PETG 共聚聚酯;(b)约 98.5%至约 1%(按重量计)的
DEG 改性 PET 共聚聚酯,其 b* 值小于 15,最好小于 10;(c)约 0.5%至约 3%(按重量计)的抗阻塞剂;以及可选的、(d)约 5%至约 5%(按重量计)的可结晶聚酯。组分(a)包括 100% 的二
羧酸残余物组分(至少 95% 的
对苯二甲酸残余物)和 100% 的二元醇残余物组分(约 65% 至约 80% 的
乙二醇残余物和约 35% 至约 20% 的
1,4-环己烷二甲醇残余物)。组分(b)包括 100 摩尔%的二
羧酸残留物组分、100 摩尔%的二元醇残留物组分、催化剂残留物和颜色控制剂残留物。二
羧酸残渣组分包括至少 75 摩尔%的
对苯二甲酸残渣。二元醇残渣组分包括 10 至 50 摩尔%的
二乙二醇残渣和 50 至 90 摩尔%的
乙二醇残渣。催化剂残留物包括 20 至 100 ppm 的
锰、50 至 300 ppm 的
锑、0 至 100 ppm 的
钛和 40 至 150 ppm 的
磷,以共聚聚酯的重量为基准。颜色控制剂残留物包括:(i) 40 至 100 ppm 的
钴;(ii) 1.5 至 10 ppm 的取代 1,4-双(2,6-二
乙酰苯胺基)
蒽醌的蓝色化合物和 0.5 至 6 ppm 的
蒽醌红色化合物;(iii) 0.5 至 10 ppm 的 1-
氰基-3H-二苯并[f,ij]
异喹啉-2,7-二酮,所有 ppm 均以共聚聚酯的重量为基准。