OPTICAL LAMINATE

• Main Authors: YANO TAKANOBU, HIKITA TAKAMI, FUCHITA TAKEHITO, CHO HONG CHAN
• Format: Patent
• Language: English; Japanese
• Published: 03.06.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SEMICONDUCTOR DEVICES; TRANSPORTING

To provide an optical laminate excellent in impact resistance.SOLUTION: There is provided an optical laminate 1 which comprises a glass plate 2, an adhesive layer 3, a film 4 and an adhesive layer 12 in this order toward one side in the thickness direction. The glass sheet 2 has a thickness of 40 μm or more and 60 μm or less. The average of tanδ of the film 4 at -100°C to -50°C is 0.06 or more, as determined by a dynamic viscoelasticity test in a tensile mode at a frequency of 10 Hz and a temperature rise speed of 2°C/min. The average of the tensile storage elastic modulus E' of the film 4 at -100°C to -50°C is 3 GPa or more and 6 GPa or less, as determined by a dynamic viscoelasticity test. The adhesive layer 12 has a thickness of 20 μm or less.SELECTED DRAWING: Figure 1 【課題】耐衝撃性に優れる光学積層体を提供すること。【解決手段】光学積層体１は、ガラス板２と、接着剤層３と、フィルム４と、粘着剤層１２とを厚み方向一方側に向かって順に備える。ガラス板２は、４０μｍ以上、６０以下の厚みを有する。周波数１０Ｈｚ、昇温速度２℃／ｍｉｎ、引張モードの動的粘弾性試験により求められる－１００℃から－５０℃におけるフィルム４のｔａｎδの平均が、０．０６以上である。動的粘弾性試験により求められる－１００℃から－５０℃におけるフィルム４の引張貯蔵弾性率Ｅ'の平均が、３ＧＰａ以上、６ＧＰａ以下である。粘着剤層１２は、２０μｍ以下の厚みを有する。【選択図】 図１