摘要:
A transparent protective layer (106) having a thickness of 100 μm is formed of a resin film (100), a boundary layer (104) and an adhesive layer (103) on a signal recording layer (102). When nf, ni and na are the indices of refraction of the resin film (100), the boundary layer (104) and the adhesive layer (103), respectively, the relationship among nf, ni, and na satisfies any one of the following equation: na ni≧nf; na nf≧ni, and the relationship among nf, ni, and na satisfies the following equation |nf−ni|
摘要:
Provided is a release sheet which is a non-silicone based and has a good releasability from a pressure sensitive adhesive layer and which makes it possible to form a release agent layer at low temperature and has a solvent resistance.The release sheet comprises a substrate film and a release agent layer, wherein the release agent layer is a cured layer obtained by irradiating a diene base polymer containing an intermolecular cleavage type photopolymerization initiator with an active energy beam.
摘要:
A transparent protective layer (106) having a thickness of 100 μm is formed of a resin film (100), a boundary layer (104) and an adhesive layer (103) on a signal recording layer (102). When nf, ni and na are the indices of refraction of the resin film (100), the boundary layer (104) and the adhesive layer (103), respectively, the relationship among nf, ni, and na satisfies any one of the following equation: na ni≧nf; na nf≧ni, and the relationship among nf, ni, and na satisfies the following equation |nf−ni|
摘要:
An optical disk-producing sheet 1 comprising an energy ray-curable stamper-receiving layer 11 onto which can be transferred convexoconcave of a stamper S, and release sheets 12 and 12′, wherein the adhesive strength after curing of the stamper-receiving layer 11 to a reflective layer 3 is greater than the adhesive strength after curing of the stamper-receiving layer 11 to the stamper S, the difference between the two adhesive strengths being not less than 50 mN/25 mm. According to this optical disk-producing sheet 1, when the cured stamper-receiving layer 11 and the stamper S are separated from one an other, there is no peeling away between the stamper-receiving layer 11 and the reflective layer 3.
摘要:
There are disclosed a protective film for optical disks which comprises a light transmittable substrate film and a pressure sensitive adhesive layer formed on one side thereof, wherein the difference in refractive index between the light transmittable substrate film and the pressure sensitive adhesive layer is at most 0.08 and a gel fraction of the pressure sensitive adhesive layer is at least 65% by mass; and an optical disk in which the protective film is stuck onto an information recording layer via the pressure sensitive adhesive layer. The protective film for optical disks is used for the purpose of protecting the information recording layer for optical disks, particularly Blu-ray Discs, and is characterized in that it never exerts adverse influence on the recording characteristics of optical disks and besides, is capable of suppressing the corrosion of the metallic reflection film and information recording layer for optical disks. The above optical disk is highly reliable, and never brings about hindrance to the information recording and reproducing function.
摘要:
An adhesive composition for a semiconductor includes an acrylic polymer (A), an epoxy-based heat curable resin (B), a heat curing agent (C), a silane compound (D) having an organic functional group, molecular weight of 300 or more and an alkoxy equivalent of larger than 13 mmol/g, and a silane compound (E) having an organic functional group, molecular weight of 300 or less and an alkoxy equivalent of 13 mmol/g or less.
摘要:
A double-faced pressure-sensitive adhesive sheet used for electronic components is provided. The double-faced pressure-sensitive adhesive sheet comprises a pressure-sensitive adhesive layer; a first release sheet including at least a first release agent layer attached to one surface of the pressure-sensitive adhesive layer; and a second release sheet including at least a second release agent layer attached to the other surface of the pressure-sensitive adhesive layer. The first release agent layer is mainly constituted of an olefin-based resin and the second release agent layer is mainly constituted of a diene-based polymer material. When an peeling force of the first release sheet with respect to the pressure-sensitive adhesive layer is defined as “X” [mN/20 mm] and an peeling force of the second release sheet with respect to the pressure-sensitive adhesive layer is defined as “Y” [mN/20 mm], the following relation is satisfied: Y−X≧50. The pressure-sensitive adhesive layer, the first release agent layer and the second release layer contain substantially no silicone compound and substantially no halogen compound.
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:
A curable pressure sensitive adhesive composition is made to contain a polymer-containing energy rays-curable component and fine particles having an average particle diameter of not more than 30 nm, wherein the solid content of the fine particles is made to be from 5 to 60 wt %. A stamper-receiving layer or a curable pressure sensitive adhesive layer for bonding a protective layer is formed using this curable pressure sensitive adhesive composition, thus producing an optical disk producing sheet. This optical disk producing sheet has a low volume shrinkage rate upon curing, and has excellent adhesiveness. If this optical disk producing sheet is used, then an optical disk having little warping and excellent inter-layer adhesion can be obtained.
摘要:
Provided is a release sheet which is a non-silicone-based and has a good releasability from a layer of a pressure sensitive adhesive and which has a stable antistatic property without being influenced by the air environment and is free of bleeding out of ionic substances derived from an antistatic agent.The release sheet is prepared by providing an undercoat layer containing a polyurethane-based resin and 0.1 to 45% by mass of a lithium salt-based antistatic agent and a layer of a rubber-based release agent formed by coating and drying a liquid containing a release agent in order on a substrate.