Far Eastern New Century Corporation

Ching-Chun Tsai

Li-Ling Chang

Chi-Feng Lin

Ting-Yu Lin

Yow-An Leu

Wen-Yi Chang

Tsan-Chin Chang

Chin-Tien Chen

Jie Shiu

Tsung-Hung Liu

Chien-Wei Wang

A heat-shrinkable polyester film made of a polyester-forming resin composition includes a recycled material, and has an exothermic crystallization peak and an endothermic melting peak which are determined via differential scanning calorimetry, and which satisfy relationships of T2−T1≤68° C. and T3−T2≤78° C., where T1 represents an onset point of the exothermic crystallization peak, T2 represents an end point of the exothermic crystallization peak and an onset point of the endothermic melting peak, and T3 represents an end point of the endothermic melting peak. A method for manufacturing the heat-shrinkable polyester film is also disclosed.

Heat-shrinkable polyester film and method for manufacturing the same

A continuous process for preparing a polyester shrinkable film includes: pumping an amorphous PET-based polyester melt having a melt viscosity &#x3b7;1 directly from a polymerization reactor into a first cooling zone; cooling the polyester melt to increase the melt viscosity thereof to a melt viscosity &#x3b7;2 such that a difference between &#x3b7;2 and &#x3b7;1 ranges from 1500 poise to 3500 poise; feeding the polyester melt into a second cooling zone; cooling the polyester melt to increase the melt viscosity thereof to a melt viscosity &#x3b7;3 ranging from 5000 poise to 12000 poise such that a difference between &#x3b7;3 and &#x3b7;2 ranges from 1000 poise to 5500 poise; and pumping the polyester melt from the second cooling zone into a zone for film-forming treatment.

Continuous process for preparing a polyester shrinkable film

Growing community of inventors

Taipei, Taiwan

Ching-Chun Tsai