81results about How to "Stable heat resistance" patented technology

An electric circuit module comprising: an electric device comprising an electric circuit to serve for passage and interruption of electric current, a packing material packing the electric circuit and a plurality of wiring members to electrically connect the electric circuit with an external circuit; and a heat sink to radiate heat from the electric device. The electric circuit module includes a fixture to fix the heat sink and the electric device together so that a heat radiating surface of the electric device comes into contact with the heat sink. The fixture is formed with a recess to accommodate therein a part of the electric device so that the heat radiating surface of the electric device is exposed from the fixture. When the electric device is fixed to the heat sink by the fixture, the heat radiating surface comes into contact with the heat sink.

The invention discloses a preparation method of an antibacterial type soft polyurethane foaming plastic. The preparation method is characterized by comprising the following technical steps: a, adding metered polyether glycol N330 and 1,4-butanediol, a catalytic amount of dibutyltin dilaurate and tripolycyanamide to a reaction kettle, filling nitrogen or an inert gas into the reaction kettle for protection, heating at 40-60 DEG C, sufficiently stirring for 6-8 hours, and reducing temperature to 25 DEG C; b, adding polyisocyanate, silicone oil, triethylamine, nanometer zinc oxide and a right amount of water to a product obtained from the step a, and stirring at high speed till foaming; c, when a large quantity of white foams appear, immediately injecting the white foams into a mould, aging at 40-60 DEG C for 60-150 minutes, and demoulding to obtain a soft polyurethane foaming plastic product. The obtained polyurethane soft foaming plastic has the advantages of good antibacterial and bactericidal property, stability in heat-resistant property, no bactericide separation, safety, environment protection, simpleness and convenience for production process and suitability for industrialized production.

The invention discloses an ultraviolet light cross-linked high flame-retardant low-smoke halogen-free polyolefin cable material and a preparation method thereof. The ultraviolet light cross-linked high flame-retardant low-smoke halogen-free polyolefin cable material comprises the following raw material components in parts by mass: 100 parts of a base material, 100-130 parts of a low-smoke halogen-free flame retardant, 5-15 parts of a synergistic flame retardant, 1-3 parts of a cationic initiator, 1-3 parts of a free radical initiator, 1-5 parts of an assistant crosslinking agent, 0.5-1.5 partsof a compound antioxidant, and 1-3 parts of a lubricant. The combination of two different photo-initiation mechanisms is utilized, the crosslinking efficiency is significantly improved, and wire andcable products have shorter production cycle, and more stable heat resistance and mechanical properties. At the same time, the low-smoke halogen-free flame retardant and the flame-retardant synergistare used, so that relatively good flame retardancy can be obtained and the mechanical properties of the material can be improved in the case of a relatively small total amount of the flame retardant.The base material with a specific composition and the lubricant with a specific composition are selected, so that the mechanical properties of the cable material are further improved, the processing performance of the material is improved, and the preparation efficiency is improved.

An object of the present invention is to provide a heat-resistant and high thermal conductive adhesive having excellent mechanical strength, heat resistance, and thermal conductivity. A heat-resistant and high thermal conductive adhesive of the present invention includes: (a) a first component in which a carbon-based filler surface-modified with a first reactive functional group and an adhesive polymer matrix having a second reactive functional group are bonded by an addition condensation reaction of the first reactive functional group and the second reactive functional group; and (b) a second component containing a carbon-based filler surface-modified with a third reactive functional group, wherein the third reactive functional group is a functional group causing an addition condensation reaction with the second reactive functional group by the application of light or heat.

The invention discloses a UV-cured flame-retardant waterborne polyurethane adhesive and a preparation method thereof. A formula of the UV-cured flame-retardant waterborne polyurethane adhesive is composed of isocyanate, dihydric alcohol, hydroxyethyl acrylate, a reactive diluent, a flame retardant, a photoinitiator, a catalyst, a polymerization inhibitor, an accelerant, triethylamine, a solvent and deionized water. The preparation method comprises the steps: step 1, selecting raw materials; step 2, preparing waterborne polyurethane acrylate; step 3, preparing waterborne flame-retardant polyurethane acrylate; and step 4, mixing and preparing the finished product; according to the invention, the UV curing technology is introduced into the adhesive industry, the curing efficiency is improved,the energy consumption is reduced, and the adhesive is an aqueous system and meets the requirements of the furniture industry on environmental protection and health; meanwhile, the reactive flame retardant is introduced into a polyurethane structure, stable flame retardance and heat resistance are formed, the prepared adhesive is high in bonding strength, the better the thermal stability and flame retardance of a cured film are, the better the storage stability is, and the wide application prospect is achieved.

Provided is a heat-resistant and highly heat-conductive adhesive agent which has excellent mechanical strength, heat-resistance and heat-conductivity. A heat-resistant and highly heat-conductive adhesive agent comprising (a) a first component wherein a carbon-based filler having been surface-modified with a first reactive functional group and an adhesive polymer matrix having a second reactive functional group are bonded to each other by an addition condensation reaction between the first reactive functional group and the second reactive functional group, and (b) a second component which comprises a carbon-based filler having been surface-modified with a third reactive functional group, wherein the third reactive functional group is a functional group which undergoes an addition condensation reaction with the second reactive functional group by the application of light or heat.

The invention relates to the structural design technology of special end mills for stainless steel and titanium alloys. Its blade adopts unequal helix angle structure. The advantages of the present invention are: 1) Using unequal helix angles, compared with previous products, can effectively suppress high-frequency vibration; 2) Adopting stable and excellent TIALN coating with heat resistance, can process materials with higher hardness; 3) Adding a long-shrinking shank type (outer diameter larger than the shank diameter) saves materials used for end mills; 4) Adopting a curved cutting edge that can suppress the height difference in vertical processing to achieve a good processing surface and improve the acceptance environment of cutting tools.

A rubber part having a metal fitting in which the metal fitting and the rubber part are integrated through an anti-corrosion chemical film formed on a surface of the metal fitting. The anti-corrosion chemical film is a zirconium-based chemical film that is harmless to human body and environment, and is transformable following the squeeze of the metal fitting. The rubber part having a metal fitting is produced by the steps of: degreasing an outer peripheral surface of the metal fitting, subjecting the surface to shot blasting treatment, degreasing the treated surface, and water washing the treated surface; forming a zirconium-based chemical film on the treated surface; water washing and drying an outer peripheral surface of the zirconium-based chemical film; forming an adhesive layer on the outer peripheral surface of the zirconium-based chemical film; and integrating the rubber part on the outer peripheral surface of the adhesive layer.

The invention discloses a graphene viscose / graphene modal blended yarn, which is formed by interweaving graphene viscose spun yarn and graphene modal spun yarn, wherein the graphene viscose spun yarnis formed by spinning graphene viscose composite fiber with the graphene content of 0.5-4wt%, and the graphene modal spun yarn is formed by spinning graphene modal composite fiber with the graphene content of 0.5-4wt%. The invention also discloses a preparation method of the blended yarn and a fabric made of the blended yarn. According to the preparation method of the blended yarn, the graphene isintroduced into the viscose fiber or the modal fiber, the functional characteristics of the graphene are reflected on the viscose fiber and the modal fiber, the viscose fiber and the modal which areexcellent in performance are given good electrical conductivity, thermal conductivity, antibacterial property, anti-ultraviolet function, far-infrared function and the like, and the mechanical properties of the viscose fiber and the modal are improved.

The invention discloses a method for inclusion body protein dilution and dialysis renaturation. A mild degeneration method is adopted for dissolving inclusion body protein, an existing secondary structure in the inclusion body protein is protected against damage so that inclusion body protein renaturation is greatly facilitated; the method integrates dilution and dialysis for performing protein renaturation, the concentration of a degeneration agent is lowered by first-time dilution, protein renaturation is promoted, the concentration of an additive is lowered by second-time dilution, the protein is more easily suitable for the environment of a basic buffer solution, finally, dialysis is performed to remove various additives, and the renaturated protein with the high renaturation efficiency and the high concentration can be obtained.

The invention discloses a novel PPEK insulated special cable. The novel PPEK insulated special cable comprises a conductor (1), the conductor (1) is plated with nickel, and a PPEK insulation layer (2) covers the nickel-plated conductor (1). A fireproof layer (3) wraps the PPEK insulation layer (2). A wear resistant layer (4) is braided outside the fireproof layer (3). The conductor of the cable is made of nickel-plated copper wires, and the insulation layer is made of polyetherketone resin. Being prepared through high-temperature melting and extruding at 350 DEG C, the novel PPEK insulated special cable has the following characteristics: the heat resistance is stable, and the conductor works at 260 DEG C for a long term; the radiation resistance is not lower than 10<8>Gy; the insulation property is good, the volume resistivity is 10<16> Omega CM, and the electric breakdown strength is 43Kv / mm; the tensile strength is not lower than 106Pma; the flame retardancy is excellent, and the oxygen index is 33; the cable is resistant to hydrolysis, can safely work in 100-DEG C water vapor for a long term, and is moisture-proof and mould-proof; the cable has excellent chemical stability and is resistant to gasoline, acetone, ethanol, xylene and sea water; and the cable is light in specific gravity, the specific gravity of the cable is 1.32 and is 65% of that of fluorine resin, and the cable is non-toxic.

The invention provides a method for preparing intermetallic aluminum-erbium or aluminum-lithium-erbium alloy by fused salt electrolysis, which is implemented in a way that: in an electrolytic furnace, metallic aluminum is use as a cathode, a graphite rod is used as an anode, and Ag / AgCl is used as a reference electrode; a mixture, which comprises 48.9 wt% of KCl, 48.9% of LiCl and 2.20% of ErCl3,is used as an electrolyte system; electrolysis is carried out at 520 DEG C; and by controlling the cathode potential at -1.4--2.1V, erbium precipitates on the solid-state aluminum cathode and diffuses to the inside of the aluminum cathode to form the aluminum-erbium alloy containing Al3Er, Al2Er and Al2Er3, or aluminum-lithium-erbium alloy containing Al-Li and Al3Er. By controlling the cathode potential, the formed strengthened phase Al3Er has high melting point and stable heat resistance, and can obviously enhance the strength of the aluminum-erbium or aluminum-lithium-erbium alloy. The invention overcomes the actual state that the composition of the aluminum-erbium or aluminum-lithium-erbium alloy prepared by the fused salt electrolysis process can not be controlled.