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

The invention relates to a carbon fiber composite material cable core, which comprises a load bearing core (12) and a protection layer (13), wherein the protection layer (13) is covered outside the load bearing core (12) through a winding process, the load bearing core (12) is a high-temperature-resistance mechanical property epoxy resin and carbon fiber compound, and the protection layer (13) is a compound of high-temperature-resistance and weather-resistance epoxy resin compositions and glass fibers. The carbon fiber composite material cable core adopts the blending epoxy resin of the hydantoin epoxy resin and low-viscosity epoxy resin as resin substrates, the requirement of glass fibers on the low viscosity of the resin can be met, and the cable core can also have excellent high-temperature-resistance performance.

The invention relates to a manufacture method of a cable core. The manufacture cost of the cable core comprises the following steps: carbon fibers are led out of a creel, gum dipping is carried out to the carbon fibers after entering a first gum dipping area, and used epoxy resin is epoxy resin with heat-resisting high mechanical property; the carbon fibers after gum dipping enter a first curing oven to be precured, carbon fiber composite core are manufactured, the diameter of each carbon fiber composite core is 5mm to 12mm, and a curing degree reaches more than 85% by adjusting temperature; glass fibers on two sides are led out and respectively enter a second gum dipping area and a third gum dipping area, and used epoxy resin is high temperature resistant and weather resistant; the glass fibers after gum dipping pass through a winding area and are wound and cover the outer layers of the carbon fiber cores, the thickness of single side is 0.5mm to 2mm, and winding speed is synchronous with pultrusion speed by being controlled by a servo motor; and the carbon fiber composite cores and the glass fiber protective layers pass through the second curing oven after being compounded, and are fully cured by adjusting temperature. Composite material cable core products pass through a dragger and are wound up on the position of a winding disc.

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 preparation method of a high-temperature-resistant and high-humidity-resistant polyurethane adhesive, which comprises the following steps: weighing a certain amount of antimicrobial crosslinking agent, assistant antimicrobial polymer and ethanol solution, simultaneously adding the substances into a reaction kettle, stirring to dissolve, heating to react for 2 hours, then,adding triethylamine, and carrying out reacting, cooling, and discharging; removing the solvent, adding the solid substance into ethanol, and stirring to prepare polyurethane adhesive mucilage; one end of the prepared antibacterial cross-linking agent is connected with one side of carbonyl of ester groups in -NH-COO- in the auxiliary antioxidant polymer, and the other end of the antibacterial cross-linking agent is connected with one end of hydroxyl of the ester groups, so that when the adhesive is hydrolyzed in high-temperature water, polymer chains are still connected through the antibacterial cross-linking agent and can still be tightly compounded on the surface of a test piece; and the bonding strength is not reduced due to hydrolysis.

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.

A rotor manufacturing method is provided with a step of evaporating a diluting solvent by: heating an adhesive to a temperature in a temperature band of not lower than a vaporization start temperatureat which the diluting solvent evaporates and lower than an expansion onset temperature; and increasing the temperature of the adhesive at a temperature increase rate lower than a temperature increaserate at which the heating is performed from a heating start temperature to the temperature in the temperature band not lower than the vaporization start temperature and lower than the expansion onsettemperature.

The invention relates to anti-scorching CR unvulcanized rubber capable of being stored for a long time at room temperature, a preparation method thereof and a preparation method of an anti-scorching agent. The materials comprise raw rubber, a reinforcing filler, a plasticizer, a vulcanization accelerator, a coupling agent, an anti-aging agent, the anti-scorching agent, an active agent and a processing aid. The preparation method of the unvulcanized rubber comprises the steps of firstly, preparing the materials into a prefabricated rubber sheet; then adding the prefabricated rubber sheet into an internal mixer or an open mill, adding the active agent, the reinforcing filler, the plasticizer, the coupling agent, the anti-scorching agent, other processing aids and the like, mixing at low temperature, and discharging rubber to prepare a first section of rubber compound; and finally, standing and cooling the first section of rubber compound, adding the vulcanization accelerator and the anti-aging agent into an open mill for mixing, fully opening cooling water during open mixing, performing low-temperature thin passing, uniformly mixing, and batching off to obtain the final rubber compound. Through multi-aspect improvement, the generated rubber material not only has excellent scorching safety, but also can be stored for a long time.

The invention relates to a Goodyear type foaming rubber material, which is prepared from a first part and a second part, wherein the first part is prepared from the following raw materials: styrene-butadiene rubber, natural rubber, zinc oxide, octadecanoic acid, N-isopropyl-N'-phenyl p-phenylenediamine, 2,2,4-trimethyl-1,2-dihexahydro quinoline, a reinforcing agent, coumarone resin, short fibers and a foaming agent; the second part comprises sulfur, accelerant dibenzothiazyl disulfide, accelerant CZ and accelerant TMTD added on the basis of the first part. The foamed sole prepared from the rubber material has the advantages of being soft, good in elasticity, good in wear resistance, small in specific gravity and the like, and the foaming rubber material has high sticking degree with the upper.

The invention discloses a preparation method of a weather-resistant hydrolysis-resistant polyurethane adhesive. The method comprises: weighing a certain amount of a free radical capture cross-linkingagent and an ethanol solution, adding the weighed products into a reaction kettle, carrying out stirring for dissolving, then, adding a polymer glue solution, heating to a temperature of 110-115 DEG Cwhile stirring, carrying out reaction for 2h, adding triethylamine, cooling to 75-80 DEG C, reacting for 6-7 hours, then, carrying out cooling and discharging, carrying out rotary evaporation to obtain a solid substance, adding the solid substance into ethanol, and stirring to prepare the polyurethane adhesive. One end of the prepared free radical capture cross-linking agent is connected with oneside of a carbonyl group of an ester group in -NH-COO-, and the other end of the free radical capture cross-linking agent is connected with one end of a hydroxyl group of the ester group, so that polymer chains are still connected through the free radical capture cross-linking agent when the adhesive is hydrolyzed in high-temperature water, and the adhesive strength of the adhesive is not reduceddue to high-temperature hydrolysis.