33results about How to "Reduced bond strength" patented technology

The present invention relates to a removable pressure-sensitive adhesive composition containing an acrylic polymer, a photopolymerization initiator and a crosslinking agent, in which the acrylic polymer and the photopolymerization initiator each are chemically bonded to the crosslinking agent. The present invention also relates to a removable pressure-sensitive adhesive composition containing an acrylic polymer and a photopolymerization initiator, the composition further containing a crosslinking agent having a reactive functional group which is capable of reacting with a reactive functional group of the acrylic polymer and a reactive functional group of the photopolymerization initiator.

The present invention relates to a thermally-foamable re-releasable acrylic pressure-sensitive adhesive tape or sheet including a microparticle-containing viscoelastic substrate and a thermal foaming agent-containing pressure-sensitive adhesive layer provided on at least one surface of the microparticle-containing viscoelastic substrate. The thermally-foamable re-releasable acrylic pressure-sensitive adhesive tape or sheet of the present invention can be easily separated or disassembled at the separation or disassembling of the bonded part while maintaining a high normal-state adhesive strength at the bonding.

The invention provides a non-aqueous electrolyte battery and a negative electrode used in this battery in which the electron conductivity between the negative electrode active material and the negative electrode current collector is ensured by preventing the adhesion strength of the negative electrode current collector and the negative electrode active material from decreasing even if a porous layer is formed on the surface of the negative electrode. In a negative electrode for a non-aqueous electrolyte battery, in which a negative electrode active material layer (2) containing a negative electrode active material and a water-based binder for the negative electrode active material layer is formed on the surface of a negative electrode current collector (1), a porous layer (3) containing inorganic particles and a non-water based binder for the porous layer is formed on the surface of the negative electrode active material layer (2). The binder for the negative electrode active material layer contains carboxymethyl cellulose (CMC) whose degree of etherification is 0.5 or greater and 0.75 or less.

With the invented dicing method, by increasing the cohesive strength while decreasing the adhesive strength of an ultraviolet-curing adhesive in advance, mixing of the ultraviolet-curing adhesive layer of an adhesive sheet with a die attach film on a dicing line can be decreased and pickup failures can be reduced, when picking up chips having a die attach film after dicing. The dicing method for a semiconductor wafer with a die-attach film comprises a first gluing step in which a die attach film is affixed to an adhesive sheet having an ultraviolet-curing adhesive laminated on a base materialfilm, a second gluing step in which a semiconductor wafer is affixed to the opposite side of the die attach film affixed to the adhesive sheet, an ultraviolet irradiation step in which the ultraviolet-curing adhesive is irradiated with ultraviolet light, and a dicing step in which the semiconductor wafer and the die attach film affixed to the adhesive sheet are diced.

The present disclosure provides a foldable display protective film having variable adhesive strength and a foldable display device including the same.

The invention discloses a method for preparing a high-temperature-resistant and high-humidity polyurethane adhesive. The specific preparation process is as follows: Weigh a certain amount of antibacterial crosslinking agent, antibacterial-promoting polymer and ethanol solution and add them into a reaction kettle at the same time, stir and dissolve, then heat up and react 2h, then add triethylamine thereinto, after the reaction, then cool and discharge, remove the solvent, add the solid matter into ethanol, stir to configure polyurethane adhesive liquid. One end of the antibacterial cross-linking agent prepared by the present invention is connected to the carbonyl side of the ester group in the antioxidant-promoting polymer -NH-COO-, and the other end is connected to the hydroxyl end of the ester group in it, so that the adhesive is hydrolyzed in high-temperature water At the same time, the polymer chains are still connected by the antibacterial cross-linking agent, and can still be tightly compounded on the surface of the test piece, and the adhesive strength will not be reduced due to hydrolysis.

The present invention relates to a rotor manufacturing method and a rotor manufacturing device. The method for manufacturing the rotor includes: heating the binder to a temperature in a temperature range between the vaporization start temperature and lower than the expansion start temperature at which the diluent solvent volatilizes; The process of volatilizing the diluent solvent by raising the temperature of the adhesive at a slow temperature rise rate in the temperature range.

Provided is an adhesive that has favorable adhesive strength for use in the untreated surface material of an untreated polyester film or the like; suppresses a decrease in adhesion strength over time, even in outdoor exposure conditions; and is capable of maintaining adhesion strength over a long period of time. This polyurethane adhesive is a polyurethane adhesive using a main agent and a curing agent, wherein the main agent contains a specific polyester polyol (A), a specific polycarbonate polyurethane polyol (B), and a specific bisphenol type epoxy resin (C) at a specific ratio, and the curing agent contains a specific amount of a polyisocyanate component with an isocyanurate skeleton.

The invention provides a rubber type pressure-sensitive adhesive as well as a preparation method and an application thereof. The rubber type pressure-sensitive adhesive comprises the following substances in parts by weight: 100 parts of butyl rubber, 30-70 parts of polyisobutene, 30-90 parts of solid terpene resin, 30-70 parts of liquid terpene resin and 150-250 parts of superfine kaolin. The rubber type pressure-sensitive adhesive disclosed by the invention has high strength and shallow color, is the solvent-free unvulcanized rubber type pressure-sensitive adhesive and can be used as a pressure-sensitive adhesive in self-adhesion rubber waterstops used in the railway.

The invention relates to a bio-degradable heat-viscose bi-component filament fiber, which comprises a surface fiber layer and is characterized in that a plurality of core-layer fibers are arranged at the center of the surface fiber layer. The invention further relates to a production method of the bio-degradable heat-viscose bi-component filament fiber, which is characterized by including the following processes of (1) drying poly butylenes succinate and polylactic acid in a vacuum environment; (2) melting and extruding the poly butylenes succinate and the polylactic acid in two screws of a double-screw composite spinning machine, feeding the same into a composite spinning component after being metered by a metering pump, spraying from a composite spinneret plate, cooling to the room temperature, and reeling to form reeled filaments after applying spinning oil; and (3) drafting after balancing the reeled filaments at the room temperature, and accordingly obtaining the bi-component composite filament fiber. The bio-degradable heat-viscose fibers produced by the production method are fine in viscosity, high in strength and better in flexibility and have excellent bio-degradation and absorbability for human bodies.

The present invention relates to a method for repairing and strengthening the bonded steel of a reinforced concrete building, which uses a device for repairing and reinforcing the bonded steel of a reinforced concrete building. The lower end of the platform is connected to the existing ground through a sliding fit, the upper end of the mobile platform is provided with a fixing mechanism, and the right side of the fixing mechanism is provided with a spraying mechanism. The present invention adopts the design concept of combining multiple control structures to repair reinforced concrete buildings with steel Reinforcement, the overall size of the structure that acts as a clamping steel plate can be adaptively adjusted according to the size of the steel plate to be clamped, and then achieve the purpose of corresponding clamping, and expand the range of processing objects that the device is applicable to.

The present invention relates to an adhesive sheet for temporary attachment and a semiconductor device producing method using same, wherein the adhesive sheet has excellent heat-resistance, and thus can implement a sufficient adhesive force even when going through a high-temperature process among semiconductor producing processes and can exhibit sufficient reduction of an adhesive force through photocuring in a separation step.

The invention relates to a room temperature curing epoxy resin composition and a preparation method thereof. The room temperature curing epoxy resin composition is characterized by comprising a component A and a component B, wherein the component A comprises the following ingredients: 100 parts of epoxy resin, 5-10 parts of diluent, and 0.5-3 parts of silane coupling agent; the component B comprises the following ingredients: 15-35 parts of amine curing agent, 0.1-3.0 parts of accelerant and 0.01-0.1 part of antioxidant. Blend epoxy resin of a hydantoin epoxy resin and a low-viscosity epoxy resin (at least one of bisphenol-A and bisphenol-F diglycidyl ether epoxy resins) is used as a resin matrix. Therefore, not only can the demand of vacuum leading-in and forming of a fiber reinforced composite material on low viscosity of the resin be met, but also the composite product can have excellent high-temperature resistance.

The invention discloses a disposable hygroscopic article, which comprises a liquid-permeable top layer, an absorption core body, a liquid-impermeable bottom layer and a multi-layer coextruded composite release film from top to bottom, wherein the multi-layer coextruded composite release film comprises a surface layer (1), a core layer (2) and a release layer (3). The disposable hygroscopic article is characterized in that the surface layer (1) is prepared from matting resin and polyolefin resin A; the core layer (2) is prepared from a filling material, polyolefin resin B and a thermoplastic elastomer; the release layer (3) is prepared from alpha-olefin polymer resin produced by metallocene, C4 to C14 polyolefin resin produced by a Z-N catalyst and fluorosilicon resin. The surface layer (1) of the multi-layer coextruded composite release film has the surface wetting tension not less than 38dyn / cm<2>, the surface electrical resistivity not less than 10<10>omega and the glossiness less than 15 percent; the release layer has the stripping force of 8.0gf / inch to 18gf / inch, the release residual adhesion rate not less than 90 percent and the heat bonding strength not less than 1.5N / inch. Compared with the prior art, the multi-layer coextruded composite release film has matting, antistatic and release anti-adhesion effects; further, the viscosity loss or the adhesive transfer of a back adhesive of a hygienic article can be effectively prevented.

The invention discloses a method for preparing a weather-resistant hydrolysis-resistant polyurethane adhesive. The specific preparation process is as follows: a certain amount of free radical capture crosslinking agent and ethanol solution are weighed and added to a reaction kettle, stirred and dissolved, and then polymer glue is added. , raise the temperature to 110-115°C for 2 hours while stirring, then add triethylamine to it, cool down to 75-80°C and react for 6-7h, then cool and discharge the material, spin evaporate to obtain a solid substance, and then add the solid substance to ethanol , stir to form a polyurethane glue. One end of the free radical capture crosslinking agent prepared in the present invention is connected to the carbonyl side of the ester group in -NH-COO-, and the other end is connected to the hydroxyl end of the ester group in it, so that when the adhesive is hydrolyzed in high temperature water, the polymer The chains are still connected by the free radical capture crosslinking agent, so that the adhesive will not reduce its adhesive strength due to high temperature hydrolysis.

Disclosed is a rubber metal laminate comprising NBR and metal that are bonded to each other through an adhesive comprising novolak-type and resol-type phenol resins, NBR, white carbon, and a vinyltrialkoxysilane coupling agent having an alkoxyl group containing two or more carbon atoms. As the adhesive, a mixed solution of a phenol resin-based adhesive solution and a rubber paste that is an organic solvent solution of an NBR compound comprising NBR, white carbon, and a silane coupling agent is specifically used. The rubber metal laminate has excellent friction and wear resistance characteristics at high temperatures and less decrease in adhesive strength after immersion in water or an antifreeze solution, and is capable of effectively preventing peeling, etc., caused thereby.

Disclosed is a manufacturing method of an aluminum alloy cavity board for furniture. Two or more aluminum alloy cavity veneers are bonded and spliced in a side surface parallel mode, and the side surfaces of the aluminum alloy cavity veneers are bonded and spliced in parallel. The aluminum alloy cavity board for the furniture is manufactured through the manufacturing method of the aluminum alloy cavity board for the furniture. Compared with an existing large-size profile extrusion technology and an existing welded profile, the bonded aluminum alloy cavity board is high in splicing and forming speed, high in flexibility, small in flatness tolerance and small in weight, the demands of different application fields can be met, the operation is convenient and fast, and therefore the purposes of saving raw materials and reducing product manufacturing cost are achieved.