64results about "Adhesive processes using foamed adhesives" patented technology

To provide an adhesive strength testing device capable of testing a tensile adhesive strength in the thickness direction of an expansive adhesive with higher accuracy than before.SOLUTION: Provided is an adhesive strength testing device for testing a tensile adhesive strength of an expandable adhesive with respect to a predetermined material, the testing device including: a pair of test pieces made of the material; a spacer; a holding member that presses the test pieces facing each other via the spacer and holds the test pieces such that a space is formed between facing surfaces of the test pieces; and a tensile member that has a first attachment portion attached to a tensile force generator that generates a tensile force and a second attachment portion attached to each of the test pieces from which the holding structure has been removed, the facing surfaces being bonded to each other by the expandable adhesive disposed in the space, and that transmits the tensile force generated by the tensile force generator to each of the test pieces to pull the test pieces in a direction in which the facing surfaces are separated from each other.SELECTED DRAWING: Figure 8

Provided herein is an expandable epoxy adhesive.

To provide a foamable adhesive sheet good in blocking resistance, adhesiveness and crack resistance, and a method for manufacturing an article using the foamable adhesive sheet.SOLUTION: The foamable adhesive sheet includes at least an adhesive layer. The adhesive layer contains an epoxy resin, a resin X compatibilized with the epoxy resin, a curing agent, and a foaming agent. The adhesive layer contains a first epoxy resin and a second epoxy resin as the epoxy resin. The softening temperature of the second epoxy resin is higher than the softening temperature of the first epoxy resin. The epoxy equivalent of the second epoxy resin is larger than the epoxy equivalent of the first epoxy resin. The resin X contains at least one of an acrylate, vinyl acetate, an acetal, urethane, an ethylene-vinyl acetate copolymer, acrylamide, styrene, vinyl chloride, an amide, acrylonitrile, cellulose acetate, phenol, vinylidene chloride and the like as a monomer component or a polymer component.SELECTED DRAWING: Figure 1

This disclosure provides a foaming adhesive sheet having, in this order, a first adhesive layer, a first gas barrier layer, a substrate, and a second gas barrier layer, wherein the first adhesive layer contains a curable adhesive and a foaming agent, and the foaming agent is a thermally expandable microcapsule.

The foam composition includes a vehicle having voids inside and a silicone MQ resin. The vehicle includes at least one of a silicone-free organic polymer or an organic monomer. The foam composition contains 50 weight percent or less of water. Also described are articles containing the foam composition, as well as processes for making the foam composition and the articles.

The present disclosure provides a foamable adhesive sheet having a first adhesive layer, a first gas barrier layer, a substrate, and a second gas barrier layer in this order, wherein the first adhesive layer contains a curable adhesive and a foaming agent, and the foaming agent comprises thermally expandable microcapsules.

The present invention relates to a method for manufacturing a paper or paperboard based packaging laminate, said method comprising: a) providing a paper or paperboard substrate, b) providing a microfibrillated cellulose (MFC) film comprising at least 50 wt% of MFC based on the dry weight of the MFC film, and c) laminating a surface of the paper or paperboard substrate to a surface of the MFC film by a melt adhesive process using a melt adhesive comprising at least 50 wt% of a water soluble thermoplastic polymer based on the dry weight of the melt adhesive, wherein the melt adhesive is applied to the surface of the paper or paperboard substrate and / or to the surface of the MFC film in a low solvent or solvent free form.

A method for producing a product, the method including: a placing step of placing an adhesive composition, including a thermosetting resin and a foaming agent, between a first member and a second member; and an adhering step of adhering the first member and the second member by foaming and curing the adhesive composition by heating, wherein the foaming agent is a thermally expandable microcapsule; the adhesive composition has predetermined properties; and the adhesive composition is heated under predetermined heating conditions in the adhering step.

To provide an adhesive tape that can be removed again from at least one substrate without leaving residue and has excellent impact resistance (impact toughness).SOLUTION: The present invention relates to an adhesive tape, a bonded composite, a method for electrically releasing a bonded composite, and the use of the adhesive tape for bonding components in an electronic device, an automobile, a medical device and a dental device. The adhesive tape includes at least the following layer: an adhesive layer D, where, the adhesive layer D includes at least one electrolyte and is subjected to foaming, where the foaming is achieved using microballoons, and the microballoons have surface layers composed of silicate or almosilicate.SELECTED DRAWING: None

The present invention provides an adhesive sheet that can be expanded by heating, which before expansion has both temporary fixation properties at room temperature and ease of insertion when inserting one component into a gap in another component, and which after expansion maintains excellent adhesive strength even in a high-temperature environment and can firmly bond components together, as well as an article using the adhesive sheet and a method for manufacturing the same. [Solution] An adhesive sheet (10) having opposing first and second main surfaces (a1, a2), wherein the first main surface of the adhesive sheet is composed of a heat-expandable thermosetting adhesive layer (1) and a plurality of adhesive portions (2) arranged in a pattern on the first main surface of the heat-expandable thermosetting adhesive layer, and the second main surface of the adhesive sheet is composed of the heat-expandable thermosetting adhesive layer that constitutes the first main surface of the adhesive sheet or another heat-expandable thermosetting adhesive layer.

The present disclosure provides a product comprising a first member, a second member and an adhesive member disposed between the first member and the second member, wherein the adhesive member includes at least a cured adhesive layer; the cured adhesive layer is a foam layer including a foamed and cured product of an adhesive composition including a curable adhesive and a foaming agent; the curable adhesive is a thermosetting adhesive, and the foaming agent is a thermally expandable microcapsule; and in a cross-sectional surface parallel to a thickness direction of the foam layer, number of bubbles, having a length, in the thickness direction of the foam layer, of more than or equal to a value obtained by subtracting 6 µm from the thickness of the foam layer, is less than 7 per 4 mm length in a direction perpendicular to the thickness direction of the foam layer.

To provide a pressure-sensitive adhesive tape capable of preventing an adhesive layer from lifting from a base material.SOLUTION: A pressure-sensitive adhesive tape includes a base material and an adhesive layer arranged at least on one side of the base material. The adhesive layer includes a thermal expansive microsphere and an adhesive agent. The thermal expansive microsphere includes a shell and a volatile substance contained inside the shell. A resin constituting the shell includes a constitutional unit having a carboxyl group. In one embodiment, a glass-transition temperature (Tg) of the resin constituting the shell is 120°C or higher.SELECTED DRAWING: Figure 1

This disclosure provides a foaming adhesive sheet having, in this order, a first adhesive layer, a first gas barrier layer, a substrate, and a second gas barrier layer, wherein the first adhesive layer contains a curable adhesive and a foaming agent, and the foaming agent is a thermally expandable microcapsule.

Microspheres refer to micro-particle dispersion systems formed by pharmaceutical molecules dispersed or adsorbed in polymer carriers such as albumin, gelatin and polylactide; and their particle sizes are different from microns to hundreds of microns.

The present disclosure provides an adhesive sheet having: a substrate; and a first adhesive layer that is disposed on one surface side of the substrate and contains a first curable adhesive, wherein the tack of the first adhesive layer is less than 0.1 N, and the Martens hardness of the first adhesive layer is 20 N / mm2 to 130 N / mm2.

A foaming adhesive sheet comprising a substrate and an adhesive layer placed on at least one surface side of the substrate; wherein the adhesive layer includes a curable adhesive, and a forming agent; the adhesive layer is placed on an outermost surface; a pressure-sensitive adhesive force of the adhesive layer is 0 N / 25 mm or more and 0.1 N / 25 mm or less; a static friction coefficient of a surface of the adhesive layer opposite to the substrate is 0.30 or less; and a pencil hardness of a surface of the adhesive layer opposite to the substrate is F or more.

The invention relates to a curable composition comprising at least one curable resin component and at least one curing agent and / or one initiator for the polymerization of the curable resin compound. Moreover, the composition comprises at least one non-linear polyacetal-bridged resin component having a large number of acetal functions and functional groups of resin component (A).

The present disclosure provides a foaming adhesive sheet including a first adhesive layer, a substrate, and a second adhesive layer, in this order, wherein the first adhesive layer and the second adhesive layer contain a curable adhesive agent; at least one of the first adhesive layer and the second adhesive layer further contains a foaming agent; a tack of the first adhesive layer is 0 gf or more and less than 10 gf; a tack of the second adhesive layer is 10 gf or more and 500 gf or less; and a loop stiffness is 50 mN / 10 mm or more.

A multilayer film having improved toughness and optical properties is provided. The multilayer film includes a base layer, an outer layer, and a tie layer between the base layer and the outer layer. The multilayer film can further include additional layers. A method for making such a multilayer film is also provided. The multilayer film according to the present invention is particularly useful for packaging applications where resistance to bursting and high clarity are desirable.

The adhesive film comprises a first (meth)acrylate copolymer, the first (meth)acrylate copolymer containing at least 55 weight percent (wt%) of linear or branched alkyl (meth)acrylate monomer units, 15-40 wt% of (meth)acrylic acid monomer units, and 0.1-5 wt% of a crosslinking monomer having two or more (meth)acrylate groups. When the first (meth)acrylate copolymer contains 15 wt% of (meth)acrylic acid monomer units, the first (meth)acrylate copolymer contains at least 5 wt% of a high T g The adhesive film comprises up to 5 wt. % of a further (meth)acrylate copolymer, the further (meth)acrylate copolymer comprising 0.1-15 wt. % of (meth)acrylic acid monomer units. The adhesive film can be a multi-layer adhesive assembly comprising a first layer of the first (meth)acrylate copolymer and a second adhesive layer adjacent to the first layer. Processes for the manufacture and a system comprising the adhesive film and the primer are also described.

The foam composition comprises a vehicle, surface-modified nanoparticles disposed in the vehicle, and at least one of a silicone MQ resin or a poly(alkylene oxide)-modified polydimethylsiloxane. Each individual nanoparticle has a particle size of less than about 100 nanometers. The vehicle can have voids therein. Also described are articles comprising the foam composition, and processes for making the foam composition and the articles.

Provided herein are expanding epoxy adhesives.

To provide an adhesive strength testing device capable of testing a tensile adhesive strength in the thickness direction of an expansive adhesive with higher accuracy than before.SOLUTION: Provided is an adhesive strength testing device for testing a tensile adhesive strength of an expandable adhesive with respect to a predetermined material, the testing device including: a pair of test pieces made of the material; a spacer; a holding member that presses the test pieces facing each other via the spacer and holds the test pieces such that a space is formed between facing surfaces of the test pieces; and a tensile member that has a first attachment portion attached to a tensile force generator that generates a tensile force and a second attachment portion attached to each of the test pieces from which the holding structure has been removed, the facing surfaces being bonded to each other by the expandable adhesive disposed in the space, and that transmits the tensile force generated by the tensile force generator to each of the test pieces to pull the test pieces in a direction in which the facing surfaces are separated from each other.SELECTED DRAWING: Figure 8

The present invention provides a foamable adhesive sheet and a method for manufacturing a structure using the foamable adhesive sheet, which can obtain excellent foaming and adhesive properties suitable for a predetermined gap. [Solution] A foamed adhesive sheet having an adhesive layer, wherein the adhesive layer contains a thermosetting adhesive and a foaming agent, and the foamed adhesive sheet is provided wherein, when a compressive load is applied to the foamed adhesive sheet by thermomechanical measurement, the temperature is raised at a predetermined heating rate, and the displacement is measured, the sum of the initial thickness of the foamed adhesive sheet and the amount of displacement at a predetermined temperature of 160°C or more and less than 200°C is 100% or more and 308% or less relative to a gap setting value of 100%.

A repeelable adhesive including a photocurable adhesive and a heat foaming agent and a repeelable adhesive tape including the repeelable adhesive are disclosed. The repeelable adhesive maintains excellent adhesion, but easily peels off from an adherend after ultraviolet (UV) irradiation and heating.

A method for foaming an adhesive includes injecting gas into an adhesive in the liquid state to decrease the density of the adhesive. The method then includes mixing the gas-infused adhesive to generate a foamed adhesive having many small bubbles throughout the adhesive, with at least 80% of the bubbles having a size of 0.005 microns or greater. The method then includes curing the foamed adhesive to preserve the size of each of the bubbles generated in the foamed adhesive.

A fire-resistant sheet for an electric vehicle battery according to an embodiment of the present invention comprises: a flame-blocking layer for blocking direct heat transfer from the flame; and a fire-resistant adhesive layer laminated on the flame-blocking layer, the fire-resistant adhesive layer comprising synthetic resin, thermal expansion material, a phosphorus-based flame retardant, and fire-resistant inorganic material.

Provided herein is an expandable epoxy adhesive.

Provided herein are materials, methods of making materials, and methods of use, wherein the materials have switchable adhesive properties. Materials of the present disclosure can reversibly change coloration in conjunction with the changing adhesive state. The films, made from a porous polymer material, can be reversibly changed from a smooth state to a rough state, allowing for reversible and tunable gripping and / or adhesive properties.

A foaming adhesive sheet comprising a substrate and an adhesive layer placed on at least one surface side of the substrate; wherein the adhesive layer includes a curable adhesive, and a foaming agent; and a peeling force of a surface side where the adhesive layer is placed, measured by SAICAS (Surface And Interfacial Cutting Analysis System) method is 2.0 N or more.