176results about "Adhesive processes using foamed adhesives" patented technology

A foaming adhesive sheet includes 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.

The invention relates to a thermal visbreaking pressure-sensitive adhesive, an integrated foam double-sided adhesive tape and a preparation method thereof, the thermal visbreaking pressure-sensitive adhesive comprises the following raw materials: an acrylate polymer solution, a rubber elastomer, tackifying resin, a foaming agent and a curing agent; the acrylate polymer solution is prepared from the following raw materials in parts by mass: 10 to 30 parts of cyclopentadienyl acrylate monomers, 10 to 20 parts of 2-ethylhexyl acrylate, 20 to 70 parts of ethyl acrylate, 4 to 18 parts of methyl methacrylate, 2 to 15 parts of 2-hydroxyethyl acrylate, 0.1 to 1 part of an initiator and 150 to 350 parts of a solvent; the thermal viscosity-reducing pressure-sensitive adhesive has the characteristics of high viscosity at room temperature and greatly reduced stripping force at high temperature, so that an adhered base material can be reused, and the cost is saved. The integrated foam double-sided adhesive tape is prepared by coating the release film with the thermal viscosity-reducing pressure-sensitive adhesive and then drying and foaming, and a closed-cell structure is formed by foaming, so that the adhesive layer has good rebound resilience and impact resistance.

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

An adhesive film includes a first (meth)acrylate copolymer containing at least 55 weight percent (wt. %) of linear or branched alkyl (meth)acrylate monomer units, from 15 to 40 wt. % of (meth)acrylic acid monomer units, and 0.1 to 5 wt. % of monomer units of a crosslinking monomer having more than one (meth)acrylate group. If the first (meth)acrylate copolymer comprises 15 wt. % (meth)acrylic acid monomer units, the first (meth)acrylate copolymer comprises at least five wt. % monomer units of a high Tg monomer. The adhesive film comprises not more than five wt. % of a further (meth)acrylate copolymer comprising from 0.1 to 15 wt. % of (meth)acrylic acid monomer units. The adhesive film can be a multilayer adhesive assembly including a first layer of the first (meth)acrylate copolymer and a second adhesive layer adjacent to the first layer. A process for making and a system including the adhesive film and a primer are also described.

The present invention relates to an expansion adhesive sheet comprising: a base material; two thermal expansion adhesive layers respectively disposed on both sides of the substrate; the expansion bonding sheet is characterized in that the expansion bonding sheet further comprises a release paper layer which is arranged on the surface of one thermal expansion bonding agent layer; and the release paper is double-sided release paper. The invention has the following beneficial effects: during winding, only one layer of release paper (the upper layer or the lower layer) is peeled off, so that the molding equipment is simplified, the winding can be carried out at a higher temperature without using measures for reducing the product performance, and the adhesion is avoided during winding; compared with a five-layer structure attached with non-woven fabric or sprayed with a release agent, the operation convenience is improved, and the requirements of instruments and equipment are simplified; according to the scheme, the degree of freedom of adhesive formula design can be improved at the same time, and the softening point of the expansion bonding layer can be reduced on the premise of ensuring that the expansion bonding layer is non-viscous at room temperature.

A foam composition includes a vehicle, surface modified nanoparticles disposed in the vehicle, and at least one of a silicone MQ resin or a polyoxyalkylene modified polydimethylsiloxane. The particle size of each nanoparticle is less than about 100 nanometers. The vehicle may have voids therein. Articles including the foam compositions and methods for making the foam compositions and articles are also described.

A sealant pouch system for adhering roofing shingles includes a plurality of pouches containing an adhesive with a viscosity of 25 cps to 2500 cps. Each pouch comprises an outer film that encases the adhesive and is configured to rupture when subjected to a sufficient force or a temperature above a predetermined threshold. The method of installation involves placing the pouches on the reveal portion of shingles in a first row, installing a second row of shingles to overlap the first row, and applying sufficient force to rupture the pouches, causing the adhesive to contact both the headlap and reveal portions of the shingles, thereby sealing the rows together. The pouches may have various shapes and are designed to prevent rolling or sliding off sloped roof decks.

Provided herein is an expandable epoxy adhesive.

To provide a method for manufacturing a thin processed glass which can suppress occurrence of a void wall between a support and a thin glass, thereby can temporarily and uniformly fix the thin glass when processing the thin glass, and can prevent contamination of the thin processed glass.SOLUTION: A method for manufacturing a thin processed glass includes the steps of: preparing an adhesive film 10 having a base material layer 12, an adhesive resin layer 14 provided on a first surface 12a side of the base material layer 12, an adhesive resin layer 16 provided on a second surface 12b side of the base material layer 12, and an intermediate layer 18 which contains thermally expandable microspheres (a) on at least one of the adhesive resin layer 14 and the adhesive resin layer 16, and is provided between the adhesive resin layer and the base material layer 12 containing thermally expandable microspheres (a); bonding the adhesive film 10 onto a support 20 through the adhesive resin layer 16; temporarily fixing thin glass 30 onto the surface of the adhesive resin layer 14; and processing the thin glass 30.SELECTED DRAWING: Figure 1

Provided is a foaming adhesive sheet that is disposed between a first member and a second member, and is used for adhering the first member and the second member, the foaming adhesive sheet including: a first adhesive layer containing a curable adhesive agent and a foaming agent, and a second adhesive layer that is disposed on one surface side of the first adhesive layer, contains a curable adhesive agent, and does not contain a foaming agent, wherein a tack of the fist adhesive layer and the second adhesive layer is 0 gf or more and less than 10 gf; and when the foaming adhesive sheet is foamed and cured so that a thickness, which is from a surface of the first adhesive layer opposing to the second adhesive layer to a surface of the second adhesive layer opposing to the first adhesive layer, becomes a distance between the first member and the second member, a thickness of the first adhesive layer and the thickness, which is from the surface of the first adhesive layer opposing to the second adhesive layer to the surface of the second adhesive layer opposing to the first adhesive layer, are set so that a foaming ratio E represented by the below equation (1) is over 1.0 and 8.5 or less.

Provided herein is an expandable epoxy adhesive.

The invention relates to an assembly for a vehicle, which protects a passenger compartment from contamination of gases released from a battery module in the event of heat dissipation. The released gas propagates into a hollow element of the vehicle that provides a channel that is blocked at a location by the expanded cured adhesive material, thereby providing a barrier to the gas.

The invention discloses a high-buffer mold mark extrusion resistant silica gel pressure-sensitive adhesive and a preparation method thereof. The high-buffer mold mark extrusion resistant silica gel pressure-sensitive adhesive comprises a first release layer, an adhesive layer and a second release layer, the adhesive layer is prepared from the following components in parts by weight: 0.5 to 3.5 parts of carbon black powder, 0.5 to 1.5 parts of dispersing agent, 0.5 to 1.5 parts of flatting agent, 10 to 40 parts of methylbenzene, 100 parts of silica gel pressure-sensitive adhesive, 8 to 12 parts of nano silicon dioxide, 13 to 18 parts of foaming microsphere, 0.8 to 1.2 parts of curing agent and 0.8 to 1.2 parts of platinum catalyst. According to the invention, a nano silicon dioxide / foaming microsphere synergistic enhancement system is added into the glue, so that the mold mark resistance and extrusion resistance of the product are improved; the colloid has excellent tensile strength and high buffering performance, and the curing agent and the catalyst are added to crosslink the silica gel pressure-sensitive adhesive, so that a complex macromolecular chain crosslinked net structure is constructed.

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.

A foam composition includes a vehicle, surface-modified nanoparticles disposed in the vehicle, and at least one of a silicone MQ resin or a poly(alkyleneoxide)-modified polydimethylsiloxane. The individual nanoparticles having a particle diameter of less than about 100 nanometers. The vehicle can have voids therein. Articles including the foam composition and processes for making the foam composition and articles are also described.

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.

To provide a foaming adhesive sheet with excellent adhesion of an adhesive layer to a substrate.SOLUTION: The present disclosure provides a foaming adhesive sheet comprising a substrate and an adhesive layer placed on at least one side of the substrate, wherein the adhesive layer includes a curable adhesive and a foaming agent. The peeling force of the side on which the adhesive layer is placed is 2.0 N or more as measured by SAICAS (Surface And Interfacial Cutting Analysis System) method.SELECTED DRAWING: Figure 1

Provided herein are expanding epoxy adhesives.

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 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.

A method for producing a battery assembly for a battery module, comprising the following steps: providing a battery cell block comprising a plurality of battery cells, where a battery cell block top side has one or more electrical contacts (of the plurality of battery cells; applying a foaming adhesive onto or into a mold; positioning the battery cell block on or in the mold and inserting the battery cell block top side into the foaming adhesive so that the battery cell block top side is at least partially wetted by the foaming adhesive in order to form contact protection for the battery cell block top side by means of the foaming adhesive; waiting until the foaming adhesive adheres to the battery cell block top side; and removing the battery cell block from or out of the mold.

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.

The invention relates to a heat-activatable foamable honeycomb core splice adhesive having improved fire retardancy, particularly with respect to smoke toxicity and smoke opacity (smoke density).

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

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.