SURFACE PROTECTIVE FILM, AND PRISM SHEET WITH SURFACE PROTECTIVE FILM

• Main Author: SHIMOMURA AYANE
• Format: Patent
• Language: English; Japanese
• Published: 23.09.2016
• 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

PROBLEM TO BE SOLVED: To provide a surface protective film that has a release layer, a base material layer and an adhesive layer, can be unwound from a wound body with small extension force after having been stored as the wound body, makes a release agent contained in the release layer less likely to be transferred onto the adhesive layer, and can keep a high adhesive force; and a prism sheet with a surface protective film containing the surface protective film.SOLUTION: A surface protective film has a release layer, a base material layer and an adhesive layer. The release layer contains saturated fatty acid bisamide. The adhesive layer contains a styrene-based elastomer. The styrene-based elastomer is a copolymer having a structure represented by general formulae A, B and A or its hydrogenated product. A is an aromatic alkenyl polymer containing 80 wt.% or more of an aromatic alkenyl compound unit. B is a conjugated diene polymer containing a conjugated diene compound unit.SELECTED DRAWING: None 【課題】離型層と、基材層と、粘着剤層とを有する表面保護フィルムであって、巻回体として保管した後であっても、小さい展開力で巻回体から繰り出すことができ、離型層に含まれる離型剤が粘着剤層に転写しにくく高い粘着力を維持できる表面保護フィルムを提供する。また、該表面保護フィルムを含む表面保護フィルム付きプリズムシートを提供する。【解決手段】離型層と、基材層と、粘着剤層とを有する表面保護フィルムであって、前記離型層は、飽和脂肪酸ビスアミドを含有し、前記粘着剤層は、スチレン系エラストマーを含有し、前記スチレン系エラストマーは、一般式Ａ−Ｂ−Ａで表される構造を有する共重合体又はその水素添加物である表面保護フィルム。Ａ：芳香族アルケニル化合物単位を８０重量％以上の含有率で含有する芳香族アルケニル重合体Ｂ：共役ジエン化合物単位を含有する共役ジエン重合体【選択図】なし