HEAT FOAMING SHEET, AND BONDING METHOD

• Main Author: SHIRAIWA HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 04.03.2022
• 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

To provide a heat foaming sheet which enables appropriate bonding of a gap between adherends, and a bonding method using the heat foaming sheet.SOLUTION: A heat foaming sheet contains a sheet-like base material, and a foamable adhesive layer provided on one surface or both surfaces of the sheet-like base material. The foamable adhesive layer is at least one outermost layer of the heat foaming sheet, contains an epoxy resin, a curing agent, a thermoplastic resin and a foaming agent, and has arithmetic average roughness Ra on the outermost surface of the foamble adhesive layer of 0.4 μm or more.SELECTED DRAWING: Figure 1 【課題】被着体間の隙間を適切に接着することが可能な加熱発泡シートの提供を目的とする。また、その加熱発泡シートを利用した接着方法の提供を目的とする。【解決手段】加熱発泡シートは、シート状基材と、このシート状基材の片面または両面に設けられた発泡性接着層とを含む。さらに、発泡性接着層が、加熱発泡シートの少なくとも一方の最外層であり、エポキシ樹脂、硬化剤、熱可塑性樹脂および発泡剤を含み、発泡性接着層の最外表面における算術平均粗さＲａが、０．４μｍ以上である。【選択図】図１