Abstract:
Removable adhesive compositions which upon water absorption undergo a decrease in adhesive strength (an adhesive composition removable with water and an adhesive composition removable with water in combination with heat). The removable adhesive compositions comprise 100 parts by weight of a base adhesive resin such as a hot-melt resin or thermosetting resin, 1 to 200 parts by weight of a water-absorbing crosslinked polymer, 1 to 300 parts by weight of heat-expandable particles, and 0.001 to 20 parts by weight of a surfactant.
Abstract:
An energy-beam-curable thermal-realeasable pressure sensitive adhesive sheet has, on at least one side of a base material, an energy-beam-curable viscoelastic layer and a thermo-expandable pressure-sensitive adhesive layer containing thermo-expandable microspheres stacked in this order. The energy-beam-curable viscoelastic layer is, for example, composed of a composition of an organic viscoelastic body and an energy-beam-curable compound or an energy-beam-curable resin. The energy-beam-curable viscoelastic layer has a thickness of about 5 to 300 mu m or may be not greater than the maximum particle size of the thermo-expandable microspheres. The energy-beam-curable thermal-releasable pressure-sensitive adhesive layer according to the invention has adhesion enough to withstand a carrying step of an adherend, causes neither winding up of the adhesive nor chipping upon cutting and facilitates peeling and collection of cut pieces after cutting.
Abstract:
An energy-beam-curable thermal-releasable pressure-sensitive adhesive sheet having, on at least one side of a base material, an energy-beam-curable thermo-expandable viscoelastic layer containing thermo-expandable microspheres and a pressure-sensitive adhesive layer stacked in this order. The pressure-sensitive adhesive layer has a thickness of about 0.1 to 10 mu and can be formed from a pressure-sensitive adhesive. The energy-beam-curable thermo-expandable viscoelastic layer, on the other hand, can be formed from a tacky substance. The energy-beam-curable thermal-releasable pressure-sensitive adhesive sheet according to the invention has adhesion enough to withstand a carrying step of an adherend, causes neither winding up of the adhesive nor chipping upon cutting and facilitates peeling and collection of cut pieces after cutting. In addition, it exhibits low contamination on the adherend after peeling.
Abstract:
An energy-beam-curable thermal-realeasable pressure sensitive adhesive sheet has, on at least one side of a base material, an energy-beam-curable viscoelastic layer and a thermo-expandable pressure-sensitive adhesive layer containing thermo-expandable microspheres stacked in this order. The energy-beam-curable viscoelastic layer is, for example, composed of a composition of an organic viscoelastic body and an energy-beam-curable compound or an energy-beam-curable resin. The energy-beam-curable viscoelastic layer has a thickness of about 5 to 300 mu m or may be not greater than the maximum particle size of the thermo-expandable microspheres. The energy-beam-curable thermal-releasable pressure-sensitive adhesive layer according to the invention has adhesion enough to withstand a carrying step of an adherend, causes neither winding up of the adhesive nor chipping upon cutting and facilitates peeling and collection of cut pieces after cutting.
Abstract:
This invention provides articles and in particular shelf and drawer liners which do not require a release layer and are capable of being repositioned on a surface while adhering to the surface prior to being bound to the surface.
Abstract:
This invention provides a self-adhesive article which is capable of being placed against a surface and repositioned or slid on that surface provided that not more than a predetermined degree of pressure is applied to the article during positioning. The article, such as a wall covering, has an adhering surface coated with an adhesive layer bearing microparticles. An optional moisture barrier layer is provided so as to inhibit the effects of water penetration into the article. A method of producing such an article is also provided.