106results 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 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.

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.

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.

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.

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.

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.

Disclosed is a method for joining two substrates, comprising the sequential steps of: i) applying a pumpable heat-foamable filler composition onto a first substrate S1; and ii) positioning a second substrate S2 such that the distance between the first substrate S1 and the second substrate S2 at the application position of the pumpable heat-foamable filler composition is between 2 and 10 mm; and iii) after step ii), heating the first substrate S1 and the second substrate S2 to a temperature above the activation temperature of the blowing agent to foam the pumpable heat-foamable filler composition, wherein between steps ii) and iii), the applied pumpable heat-foamable filler composition is not in contact with the second substrate S2. The pumpable heat-foamable filler composition includes at least one rubber, polyvinyl chloride resin and / or acrylic resin powder, and a foaming agent. The method of bonding substrates using a thermally expandable composition results in a reduction of the bond line read-through (BLRT) phenomenon.

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.

To provide an adhesive sheet that can ensure favorable ease of insertion even when inserted into a narrow space in use, and can also favorably exhibit various characteristics during or after heating.SOLUTION: An adhesive sheet includes: a first adhesive layer formed of an adhesive composition containing an epoxy resin having a softening point of 50°C or higher and a thermal curing agent; and a second adhesive layer that has tackiness and is foamed and cured by heat. An outermost layer of the adhesive sheet is formed of the first adhesive layer, and the adhesive sheet has a plurality of convex structures on a surface on a side of the outermost layer.SELECTED DRAWING: Figure 1

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.

A thermosettable precursor of an expanded structural adhesive composition comprising: an epoxy compound; an epoxy curing agent; an expanding agent; and a mineral pigment selected from the group of phosphate metal complexes. In addition, a method of bonding two parts and to uses of the thermosettable precursor of an expanded structural adhesive composition.

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

To provide an expandable adhesive sheet superior in coherency for a matrix of an adhesion layer.SOLUTION: An expandable adhesion sheet 10 has a matrix 2 and an adhesion layer 1 arranged on at least one side of the matrix 2. The adhesion layer 1 contains curable adhesive and blowing agent, and the detachment force of the side arranged with the adhesion layer is equal to or more than 2.0 N when measured by SAICAS (Surface And Interfacial Cutting Analysis System) method.SELECTED DRAWING: Figure 1

To provide a foaming adhesive sheet that can be used in gaps of members or between members and has excellent insertability and adhesiveness.SOLUTION: A foaming adhesive sheet comprising a base material and an adhesive layer disposed on at least one surface side of the base material, in which the adhesive layer contains a curable adhesive agent and a foaming agent, the adhesive layer is disposed on a topmost layer, the adhesive layer has an adhesive force of 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 base material is 0.30 or less, and a pencil hardness of the surface of the adhesive layer opposite to the base material is F or more.SELECTED DRAWING: Figure 1

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.