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一种热封型BOPET薄膜、制备方法及应用

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10Claims · 2 independent
§ Ⅰ

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IPC Classification

B32B 27/36 (2006.01)C08G 63/672 (2006.01)C08G 63/78 (2006.01)C08K 3/36 (2006.01)B32B 27/06 (2006.01)B29D 7/01 (2006.01)B32B 33/00 (2006.01)

本发明涉及BOPET薄膜技术领域,具体涉及一种热封型BOPET薄膜、制备方法及应用;该方法先制备改性低熔点PET聚酯原料,通过在对苯二甲酸、间苯二甲酸等酸醇体系中加入1,2‑丁二醇、二甘醇及无机纳米粒子,经酯化、预缩聚、终缩聚反应制得;再采用三层共挤工艺,将芯层、热封层、抗粘表层熔体分别处理后汇合流延,经双向拉伸、牵引收卷等步骤制得成品。本发明有效降低聚酯熔点,改善其流动与分散性能,解决现有PET热封膜封合牢度低、热封强度不均的问题,所制薄膜热封性能优良且稳定,可适用于包装、日化、医疗、电子高端领域。

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