Provided is a novel PSA sheet having limited light transmission and an increased refractive index. The PSA sheet provided by the present invention has a PSA layer. The PSA sheet has a total light transmittance of 80% or lower as well as a refractive index of 1.50 or higher.

Provided is a PSA sheet having limited light transmission, increased refractive indices for IR light and VIS light with less wavelength dependence of refractive index and good adhesive properties. The PSA sheet provided by this invention has a PSA layer. The PSA sheet has a total light transmittance below 80%. The PSA layer has a first face and a second face on the opposite side to the first face. The PSA layer comprises high-refractive-index particles. The high-refractive-index particles are concentrated in the first face side of the PSA layer. On the first face, the difference between the refractive index n.sub.VIS at 500 nm wavelength and the refractive index n.sub.IR at 940 nm wavelength is less than 0.03.

The invention relates to on-demand debondable pressure sensitive adhesive and laminating adhesive compositions and uses thereof. The debondable pressure sensitive adhesives and laminating adhesives are applied onto a substrate to form a bond, and upon exposure to electron beam or UV light energy source, the adhesive can dissociate from the substrate. The debondable pressure sensitive adhesives and laminating adhesives are particularly suitable for recycling in a circular economy.

The present invention relates to an adhesive film for a semiconductor, including: a first layer including an adhesive binder and a heat-dissipating filler; and a second layer including an adhesive binder and a magnetic filler, which is formed on at least one surface of the first layer, wherein the adhesive film has a predetermined composition for the adhesive binder included in each of the first layer and the second layer.

The present disclosure relates to a UV-curable composition and adhesive film, adhesive tape and bonding member containing the same. Said UV-curable composition is a UV-curable composition catalyzable by photobase. Said UV-curable composition comprises (1) acrylic polymer and/or ethylene-vinyl acetate copolymer; (2) curable components, comprising polyfunctional mercaptan and polyfunctional epoxy resin; and a (3) photobase generator. The composition of the present disclosure can be coated into an adhesive tape or adhesive film; such adhesive tape or film possesses initial adhesion before UV curing is carried out and can have the strength of a semi-structural adhesive or a structural adhesive after UV curing is carried out.

The invention relates to a peel detection label that is a laminate including a support, a pattern layer formed in a part of the surface of the support, and a pressure-sensitive adhesive laminate having at least a low modulus layer (X), a high modulus layer (Y) and a pressure-sensitive adhesive layer (Z) in that order, in which the low modulus layer (X) has an n-layered structure (where n is an integer of 1 to 10) having a surface in contact with the support and the pattern layer and a surface in contact with the high modulus layer (Y), and the low modulus layer (X) satisfies a specific thickness-average shear storage elastic modulus.

A pressure-sensitive adhesive layer consists of a dried product of a water-dispersed pressure-sensitive adhesive composition. The water-dispersed pressure-sensitive adhesive composition contains a water-dispersible polymer, water, and polyacrylic acid. The polyacrylic acid content is above 0.1 parts by mass and 7 parts by mass or less with respect to 100 parts by mass of the water-dispersible polymer. A thickness of the pressure-sensitive adhesive layer is 10 μm or more and 40 μm or less.

Compositions, articles, and methods involving pressure-sensitive adhesives comprising polymer-grafted particles are generally described.

Disclosed is an aqueous adhesive comprising a copolymer obtainable by polymerizing a plurality of monomers, wherein the plurality of monomers comprise a (meth)acrylic acid ester, and the aqueous adhesive is applied to a paper tube. Also disclosed is a paper tube coated with the aqueous adhesive which is used for paper straws.

Disclosed is an aqueous adhesive comprising a copolymer obtainable by polymerizing a plurality of monomers, wherein the plurality of monomers comprise a (meth)acrylic acid ester, and the aqueous adhesive is applied to a paper tube. Also disclosed is a paper tube coated with the aqueous adhesive which is used for paper straws.