A highly pressure-sensitive adhesive optical transparent pressure-sensitive adhesive body or optical transparent pressure-sensitive adhesive laminate which stably provide peeling site selectivity between both sides of the transparent pressure-sensitive adhesive body and a release sheet in the case of pasting, whereas stably and easily express peeling site selectivity between both sides of the transparent pressure-sensitive adhesive body in the case of rework, that is, re-pasting, as well as superior adhesion stability after pasting, and a method for producing the same.
An optical transparent pressure-sensitive adhesive body and the like having pressure-sensitive adhesive surface (a) and pressure-sensitive adhesive surface (b) having different pressure-sensitive adhesive property from each other, and being formed with an addition reaction type silicone gel, characterized in that pressure-sensitive adhesive performance (Ga) of pressure-sensitive adhesive surface (a) and pressure-sensitive adhesive performance (Gb) of pressure-sensitive adhesive surface (b) satisfy a relationship of Ga < Gb, and pressure-sensitive adhesive performance (Ga) and pressure-sensitive adhesive performance (Gb) have 5 to 32 in ball number and 2 to 12 in ball number difference in the tilt type ball tack test (tilt angle: 30 degrees) according to JIS Z0237; and that pressure-sensitive adhesive surface (a) and pressure-sensitive adhesive surface (b) are formed by tightly adhering an uncured raw material of said addition reaction type silicone gel to different release film (A) and release film (B) and thermal-curing them, and the release film (A) and the release film (B) have a release treatment layer comprising a fatty acid amide type additive.
一种高压敏粘合性光学透明压敏粘合体或光学透明压敏粘合层压板,其在粘贴时能稳定地提供透明压敏粘合体两面与离型纸之间的剥离部位选择性,而在返工,即重新粘贴时,能稳定和容易地表达透明压敏粘合体两面之间的剥离部位选择性,以及粘贴后的优异粘合稳定性,以及生产这种粘合体的方法。
一种光学透明压敏胶体和类似物,其压敏胶面(a)和压敏胶面(b)的压敏粘合性能互不相同,并由加成反应型
硅凝胶形成、其特征在于压敏粘合面(a)的压敏粘合性能(Ga)和压敏粘合面(b)的压敏粘合性能(Gb)满足 Ga < Gb 的关系,并且压敏粘合性能(Ga)和压敏粘合性能(Gb)在根据 JIS Z.30°进行的倾斜型粘球试验(倾斜角:30°)中,球数相差 5 至 32 个,球数相差 2 至 12 个:根据 JIS Z0237,压敏粘合面(a)和压敏粘合面(b)是通过将所述加成反应型硅凝胶的未固化原料与不同的离型膜(A)和离型膜(B)紧密粘合并热固化而形成的,离型膜(A)和离型膜(B)具有由
脂肪酸酰胺型添加剂组成的离型处理层。