LAMINATE

• Main Authors: FUJITA TAKUYA, NIWA MICHIHITO, SUMIDA HIROMICHI
• Format: Patent
• Language: English; Japanese
• Published: 10.06.2021
• 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 laminate including a laminated structure of an adhesive sheet, a reinforcing agent layer, and an adherend, the laminate being capable of expressing all of a high adhesive strength, high impact resistance and high water resistance.SOLUTION: A laminate includes a laminated structure of an adhesive sheet, a reinforcing agent layer, and an adherend. The laminate shows an adhesive strength of 20 N/20 mm or more when the adhesive sheet is peeled from the laminated structure of the adhesive sheet, the reinforcing agent layer, and a SUS plate, a polycarbonate plate or an aluminum plate at 23°C and 50% RH, and at a tensile rate of 300 mm/min and a peel angle of 180°. The laminated structure of the adhesive sheet, the reinforcing agent layer, and the SUS plate shows an impact resistance of 0.35 J or more. When a pre-immersion adhesive strength when the adhesive sheet is peeled from the laminated structure of the adhesive sheet, the reinforcing agent layer, and the SUS plate is represented by A0 (N/10 mm), and a post-immersion adhesive strength when the laminated structure is immersed in warm water (40°C) and held for 24 hours, and then the adhesive sheet is peeled is represented by A1 (N/10 mm), the laminate has an adhesive strength maintenance ratio of 85% or more calculated from (A1/A0)×100.SELECTED DRAWING: Figure 1 【課題】高い接着力、高い耐衝撃性、および高い耐水性をいずれも発現できる、粘着シートと補強剤層と被着体との積層構造を含む積層体を提供の提供。【解決手段】２３℃、５０％ＲＨにおいて、粘着シートと補強剤層とＳＵＳ板、ポリカーボネート板、又はアルミニウム板との積層構造体から粘着シートを引張速度３００ｍｍ／分、剥離角度１８０度で剥離したときの接着力が２０Ｎ／２０ｍｍ以上であり、粘着シートと補強剤層とＳＵＳ板との積層構造体の耐衝撃性が０．３５Ｊ以上であり、粘着シートと補強剤層とＳＵＳ板との積層構造体から粘着シートを剥離したときの浸漬前接着力をＡ０（Ｎ／１０ｍｍ）とし、積層構造体を温水（４０℃）に浸漬して２４時間保持した後に剥離したときの浸漬後接着力をＡ１（Ｎ／１０ｍｍ）としたときに、（Ａ１／Ａ０）×１００で算出される粘着力維持率が８５％以上である、粘着シートと補強剤層と被着体との積層構造を含む積層体。【選択図】図１