ADHESIVE SHEET, BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE

• Main Authors: KASHIMA MUTSUYUKI, TAKAI HIDEYUKI
• Format: Patent
• Language: English; Japanese
• Published: 18.02.2021
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BLASTING; CHEMISTRY; DYES; HEATING; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PHYSICS; POLISHES; SYSTEMS THEREOF; USE OF MATERIALS AS ADHESIVES; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide an adhesive sheet that can exhibit excellent light diffusion properties and optical transparency.SOLUTION: An adhesive sheet is formed from an adhesive composition having an acrylic polymer, a crosslinker, and a light diffusion fine particles with a refractive index of 1.50 or more and less than 1.70. The content of the light diffusion fine particles is 1-25 pts.mass with respect to 100 pts.mass of the acrylic polymer. The haze value is 80% or more and 99% or less. The total light transmittance is 70% or more and 95% or less.SELECTED DRAWING: Figure 1 【課題】本発明は、優れた光拡散性と光透過性を発揮し得る粘着シートを提供することを課題とする。【解決手段】本発明は、アクリル重合体と、架橋剤と、屈折率が１．５０以上１．７０未満の光拡散微粒子を有する粘着剤組成物から形成される粘着シートであって、光拡散微粒子の含有量は、アクリル重合体１００質量部に対して１〜２５質量部であり、ヘーズ値が８０％以上９９％以下であり、全光線透過率が７０％以上９５％以下である粘着シートに関する。【選択図】図１