RELEASE FILM AND PROTECTIVE FILM

• Main Authors: TASAKI TATSUYUKI, INOUE NORIHIDE, NAKAMICHI NATSUKI, MACHIDA TETSUYA, BABA YUSUKE, WATANABE KOTA
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2019
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PERFORMING OPERATIONS; POLISHES; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

Provided are a release film having excellent heat resistance, appearance, mechanical characteristics, followability, stain resistance and release properties; and a protective film having a release layer that exhibits the aforementioned characteristics. The release film has at least one release layer, and the release layer is characterized by comprising components (A) and (B). (A) 60 wt% or more ofat least one type of polyolefin selected from among polyethylene, polypropylene and polybutene. (B) 0.1-40 wt% of an ultrahigh molecular weight polyethylene having an intrinsic viscosity [ETA] of 8 dl/g or more. Furthermore, the protective film has an adhesive layer on the outermost layer that faces the release layer. 本发明提供耐热性、外观、力学特性、追随性、耐污染性、脱模性优异的脱模膜及具备具有所述特性的脱模层的保护膜。具有至少1层的脱模层的脱模膜，其特征在于，脱模层具有以下(A)、(B)。含有60重量％以上的(A)选自聚乙烯、聚丙烯、聚丁烯中的至少一种的聚烯烃树脂。0.1～40重量％的(B)特性粘度[η]为8dl/g以上的超高分子量聚乙烯。进而，还提供在与所述脱模层相对的最外层具有粘合层的保护膜。