摘要:
The pressure sensitive adhesive sheet of the present invention is characterized by a pressure sensitive adhesive sheet in which a pressure sensitive adhesive layer is formed on at least one surface of a base material and in which a surface of the above pressure sensitive adhesive layer at a side opposite to the base material is brought into contact with a release agent layer, wherein the pressure sensitive adhesive layer and the release agent layer do not substantially contain a silicone-based compound, and the pressure sensitive adhesive layer contains an antioxidant. It has a good releasing performance from the release agent layer and is excellent in a releasing stability after ageing.
摘要:
A laminated sheet 1A′ is produced in which target sheets 301A of a predetermined shape constituted from an adhesive/curable layer 31A made of an energy ray-curable material and a substrate 32A are provided on a width-direction central portion of a release surface of a long release sheet 2A, and a protective portion constituted from the substrate 32A and a protective member 41A is provided via the adhesive/curable layer 31A made of the energy ray-curable material on both side portions in width-direction of the release surface of the release sheet 2A; the energy ray-curable material is cured at both edges in width-direction of the laminated sheet 1A′ before rolling up the laminated sheet 1A′. As a result, oozing out of an adhesive/curable material of the adhesive/curable layer 31A from the both edges in width-direction of the laminated sheet 1A′ when the laminated sheet 1A′ is rolled up can be prevented.
摘要:
Optical disc manufacturing sheet 1 comprising protective sheet 12 and curable adhesive layer 11 with a pre-curing storage elastic modulus of 103 to 106 Pa and a post-curing storage elastic modulus of 107 to 1011 Pa is laminated on reflective layer 3 formed on optical disc substrate 2. In the optical disc D1 obtained in this way, adhesive layer 11 has a uniform thickness and protective sheet 12 is resistant to pressure imprint.
摘要:
The present invention provides an optical disk producing sheet 1, obtained by laminating a stamper-receiving layer 11 that is energy rays-curable and whose storage elastic modulus prior to curing is from 103 to 107 Pa, and an adhesive layer 12 whose adhesive strength to polycarbonate is at least 200 mN/25 mm, and whose storage elastic modulus during the curing of the stamper-receiving layer 11 is from 103 to 107 Pa. With the optical disk producing sheet 1, separation that occurs during the production of an optical disk, or during the storage of the finished product, is prevented, and warpage in the resulting optical disk is reduced.
摘要:
An optical disc-producing sheet 1, which has an adhesive layer 11 having a specific heat capacity after curing of not more than 1.9 J/g·° C. at 80° C. and a protective sheet 12, is laminated onto an information recording layer 3 (a laminate of a reflecting layer 31, a dielectric layer 32, a phase change layer 33 and a dielectric layer 32′) formed on an optical recording medium substrate 2. According to this optical disc, recorded information can be reproduced accurately even in the case that recording/erasure or reproduction of information has been carried out repeatedly.
摘要:
A pressure sensitive adhesive sheet which is a laminate of a photorecording layer containing a photosensitive material and a pressure sensitive adhesive layer which is a pressure sensitive adhesive layer or a pressure sensitive adhesive layer of the energy hardening type, a multilayer structured article for photorecording medium using this sheet in which the photorecording layer and the pressure sensitive adhesive layer are laminated alternately, and a multilayer photorecording medium having this article, are provided. The sheet, the article and the medium exhibit excellent accuracy of thickness and can be produced easily without restriction on the material. The sheet, the article and the medium having a great area can be produced. When the pressure sensitive adhesive layer is formed with a pressure sensitive adhesive layer of the energy hardening type, formation of press marks on the multilayer photorecording medium can be suppressed.