摘要：【中文】本发明公开了一种生物基PTT/PLA热收缩标签膜，属于塑料薄膜加工技术领域，包括芯层、分别覆盖于所述芯层上、下表面的两个面层，面层由PLA和PLA开口爽滑母粒混合而成，芯层由PLA、PTT和SEBS相容剂混合而成，本发明使用PTT作为PLA的改性剂，利用PTT良好的柔顺性和高回弹性特点，改善纯PLA热收缩标签膜的韧性差、收缩力偏大的问题。 【EN】The invention discloses a bio-based PTT/PLA heat-shrinkable label film, which belongs to the technical field of plastic film processing and comprises a core layer and two surface layers respectively covering the upper surface and the lower surface of the core layer, wherein the surface layers are formed by mixing PLA and PLA opening smooth master batches, and the core layer is formed by mixing PLA, PTT and SEBS compatilizers.

摘要：【中文】本发明属于塑料薄膜加工领域，具体涉及一种白色聚酯热收缩标签膜的制备方法，所述标签膜采用三层共挤结构，包括上表层、下表层和芯层，所述上表层和下表层以PETG、PE、SEBS、PEG为原材料，所述芯层以PETG、PE和SEBS为原材料。本发明解决了现有白膜制备过程中二氧化钛造成密度增大的问题，利用PE晶体的双折射现象和PE与PETG之间光折射率的差异，有效降低共混物薄膜的透明度，使薄膜呈现乳白色，摒弃了二氧化钛的使用，也就不存在二氧化钛带来的影响。 【EN】The invention belongs to the field of plastic film processing, and particularly relates to a preparation method of a white polyester heat-shrinkable label film. The invention solves the problem of density increase caused by titanium dioxide in the existing white film preparation process, effectively reduces the transparency of the blend film by utilizing the birefringence phenomenon of PE crystals and the difference of the light refractive index between PE and PETG, enables the film to be milky white, abandons the use of titanium dioxide, and has no influence caused by titanium dioxide.