46results about How to "High tensile elongation" patented technology

Blends of siloxane copolymers, notably siloxane polyimides, with polyaryl esters or polyaryl ester carbonates containing linkages derived from resorcinol, show improved flame resistance, as measured by two minute and peak heat release, compared to conventional polycarbonates. In some instances transparent flame retardant blends can also be prepared. The compositions show good melt processability, high impact strength and high elongation, and can be used to make various flame retardant articles including sheets and films.

A carbon fiber tow composed of many carbon filaments and having a strand tensile strength of 3.8 to 5.5 GPa, a strand tensile modulus of 180 to 220 GPa and a carbon crystal size (Lc) of 13 to 18 Å. This carbon fiber tow can be produced by subjecting a precursor fiber tow composed of many polyacrylonitrile filaments which have a lightness difference (ΔL) of 50 or below and fineness of 1.1 to 1.7 dtex to oxidative stabilization and subjecting the stabilized fiber tow to carbonization with the maximum temperature within the range of 1,100 to 1,300° C. in an inert atmosphere while raising the temperature from 1,000° C. to the maximum temperature at a temperature rise rate of 100 to 2,000° C./min.

The invention discloses a sports ground-used nanometer environmental-friendly type polyurethane paving material and a preparation thereof, and the paving material consists of A component, B component, black rubber particles and a catalyst; the A component is: diisocyanate: 20 to 50 percent; polyether polyol: 40 to 70 percent and a nanometer additive: 5 to 25 percent; the B component is: polyether polyol : 20 to 40 percent ; processing aid: 5 to 25 percent; nanometer additive: 0.1 to 5 percent; fillings: 40 to 70 percent, pigments: 0.1 to 2.0 percent; ultraviolet absorbent: 0.01 to 0.1 percent and antiaging agent: 0.01 to 0.1 percent, wherein, the weight proportion of the A component and the B component is 1:3 to 5, the black rubber particles account for 20 percent in the sum weight of the A composition and the B component, the catalyst accounts for 0.15 percent in the sum weight of the A composition and the B component. The preparation method is that, the A component and the B component are mixed according to the weight proportion of 1:3 to 5 of the A component and the B component, then the black rubber particles, the amount of which accounts for 25 percent in the sum weight of the A composition and the B composition are added, and after uniform mixing, zinc iso-octoate, the amount of which accounts for 0.15 percent in the sum weight of the A composition and the B composition are added, and then the track and field runway paving-used polyurethane elastomers are prepared after stirring and polymerization and solidification. The sports ground-used nanometer environment-friendly type polyurethane paving material takes low poisonous and high activity MDI as raw material and leads the environment-friendly property of the paving materials of plastic sports runways and sports playing courts to reach the international standard, and improve various physical index of products obviously.

A lithium based battery includes a cell structure group formed by stacking unit cells each including a positive electrode, a negative electrode, and a separator interposed therebetween, or formed by repeatedly folding or winding an integral body of the unit cells; a battery container for containing the cell structure group; and an electrolyte, which is poured in the battery container after the cell structure group is contained in the battery container. The outer peripheral surface of the battery container is covered with an ion impermeable and extensible high polymer sheet having a tensile elongation percentage of 1% or more. With this configuration, even if there happens such a severe accident that nail pieces the battery or the battery is crashed, it is possible to prevent a large short-circuit current from flowing between the positive and negative electrodes, and hence to ensure a higher safety of the battery.

The invention discloses a Mo-Si-B-W multi-phase composite material, which is prepared with raw materials of the following atom percentages: 5-25 percent of silicon, 1-10 percent of tungsten, 5-30 percent of boron, and the resting being molybdenum. The mass purity of the silicon is no less than 98 percent, the mass purity of the tungsten is no less than 99 percent, the mass purity of the boron is no less than 99 percent, and the mass purity of the molybdenum is no less than 99 percent. The invention also discloses a preparation method of the Mo-Si-B-W multi-phase composite material. Mechanicalalloy and hot pressure sintering are adopted in the method to prepare the Mo-Si-B-W composite material, the method has the advantages of low energy consumption, short cycle and the like, and tungstenpowder is introduced into an Mo-Si-B composite material system so as to increase the high-temperature strength of the material and improve the reliability of the material in use. The composite material prepared in the method has a uniform and fine microstructure, the tensile strength of the composite material at 1400 DEG C is 400-460MPa, and the tensile elongation of the composite material is up to 400 percent.

The invention discloses a hydrogenated butadiene-acrylonitrile rubber composition material, and a preparation method and application thereof. The hydrogenated butadiene-acrylonitrile rubber composition material is prepared from the following raw material components in parts by weight: 100 parts of hydrogenated butadiene-acrylonitrile rubber, 4-10 parts of zinc oxide, 0.5-2.5 parts of stearic acid,1-4 parts of an anti-ageing agent, 20-30 parts of carbon black with a particle size of 26-30 nm, 25-35 parts of carbon black with a particle size of 40-48 nm, 5-15 parts of white carbon black, 5-15 parts of a polyester polyether plasticizer, 2-4 parts of a vulcanizing agent and 1-3 parts of an auxiliary crosslinking agent. The acrylonitrile content of the hydrogenated butadiene-acrylonitrile rubber is 41.3-43.1%, the saturation degree of the hydrogenated butadiene-acrylonitrile rubber is 99% or more, and the Mooney viscosity ML(1+4) at a temperature of 100 DEG C of the hydrogenated butadiene-acrylonitrile rubber is 60-70. The composition material is relatively good in breaking strength, tearing strength and elastic ductility; the composition material has relatively good high-temperature resistance, low-temperature resistance and oil resistance; the composition material has a relatively long service life; and the composition material has excellent performance as an oil-seal material for an engine oil dipstick sleeve of an automobile. The preparation method of the composition material is simple in steps, easy in operation, and suitable for industrial production.

The invention discloses an easy-to-pull removable double-sided adhesive tape of a TPU base material. The adhesive tape comprises the following components in parts by mass: 80-150 parts of rubber raw materials, 75-130 parts of tackifying resins, 100-350 parts of toluene, 0.1-5 parts of adhesion promoters and 5-15 parts of color paste. The adhesive tape of the TPU base material is a double-sided fixing adhesive tape with higher adhesive strength, can be used after stripping release paper or laminating release films when in use, can be removed only by stretching the adhesive tape when needed, andcan bring great convenience to workers in the maintenance of electronic components.

A process for simply and inexpensively producing a conjugated diene polymer with a narrow molecular weight distribution and a high cis-bond content at a low cost is provided. The process comprises a polymerization step, wherein a conjugated diene polymer having a cis-1,4-bond content of 98.5 mass % or more and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) measured by gel permeation chromatography of 2.5 or less is obtained by carrying out a polymerization reaction in conjugated diene compounds using a catalyst composition containing a rare earth element-containing compound or a reaction product of the rare earth element-containing compound with a Lewis base, an aluminoxane and/or organoaluminum compound, and an iodine-containing compound.

The invention relates to a water-soluble high-strength high-elasticity putty paint and a preparation method thereof. The water-soluble high-strength high-elasticity putty paint comprises a component A and a component B in a weight ratio of 1: (0.8-1.2), wherein the component A is putty powder, and the component B comprises, in parts by weight, 400-500 parts of elastic resin, 60-100 parts of curing agent, 5-50 parts of tackifier, 5-50 parts of water repellent agent, 50-100 parts of diluent and 25-100 parts of foamed filaments. The putty paint prepared by rationally adjusting the composition and proportions of various raw materials is good in adhesion which is greater than or equal to 2MPa, high in elongation at break and thus capable of extending by 3-4 times, excellent in waterproofness and capable of resisting weather for 15 years, extra excellent in waterproofness and alkali resistance, exceeding 1000hr, respectively, and also environment-friendly and pollution-free; and the formed coating is thick to feel, soft in luster and even in chroma.

The invention provides a heat-resistant and oil-resistant sealing ring and a preparation method thereof. Nitrile rubber is adopted as a main material and has excellent oil resistance and heat resistance, and the nitrile rubber is adopted as a main raw material for preparing the heat-resistant and oil-resistant sealing ring, so that the sealing ring has excellent oil resistance and heat resistance;a polyolefin elastomer can enable the sealing ring to have high tensile strength and tensile elongation; chlorosulfonated polyethylene is used for improving the heat resistance of the heat-resistantand oil-resistant rubber, so that the sealing ring has excellent aging resistance; and vinyltrimethoxysilane is used for improving the oil resistance of the sealing ring, so that the sealing ring still has high tensile strength and tensile elongation at break after being soaked in oil. Experimental results show that the heat-resistant and oil-resistant sealing ring has excellent heat resistance, oil resistance, mechanical properties and the like. The preparation method is simple, and the prepared heat-resistant and oil-resistant sealing ring has excellent elasticity, oil resistance and heat resistance.

The invention relates to a method for preparing anti-breakage gum for a wall. The method comprises the following steps: coating a printing paper layer with an ink absorption coating, coating a release layer with an anti-breakage acrylate pressure sensitive adhesive layer, drying, and compounding, thereby obtaining the anti-breakage gum for the wall, wherein the anti-breakage acrylate pressure sensitive adhesive used in the anti-breakage acrylate pressure sensitive adhesive layer refers to an anti-breakage acrylate pressure sensitive adhesive for the wall and is mainly formed by copolymerization of a soft monomer, a hard monomer and functional monomers; the functional monomers refer to polytetrahydrofuran acrylate and pyridine-2-acrylic acid; the polytetrahydrofuran acrylate has a long carbon chain of ether bonds and is high in flexibility, and the tensile elongation of the pressure sensitive adhesive can be obviously improve; and the pyridine-2-acrylic acid can form coordination with Fe element in the wall, and the adhesive force with the wall is enhanced. Therefore, the anti-breakage gum for the wall has the advantages of high adhesive strength, high adsorption force, high weather resistance, high peel strength and high elongation at break and can be well applied to adhesion with the wall.

The invention discloses a heat treatment method for the X80 bent pipe welding joint with the excellent low-temperature toughness. The heat treatment method comprises the following steps of firstly, carrying out three-wire two-layer two-pass welding on the X80 pipeline steel by adopting a standard submerged arc welding wire to obtain a straight weld joint welding joint; secondly, the obtained straight weld joint welding joint is subjected to normalizing heat treatment through a high-temperature induction heating furnace, heat treatment is carried out at the same time, direct air cooling is conducted, and a bent pipe welding joint is obtained; and finally, the obtained bent pipe welding joint is placed in a box-type resistance furnace, and heat treatment is carried out again and air-cooled to room temperature. Compared with the prior art, the method is simple and easy to operate, the operation flow is simplified, the mechanical property reduction caused by heating bending of the X80 bentpipe welding joint is greatly improved, the low-temperature impact absorption work at the X80 bent pipe is guaranteed, the tensile elongation is good, and the yield strength and the tensile strengthare higher.

A production process of high-flame-retardant and oil-resistant PVC particles include the following steps of preliminary preparation, raw material preparation, filler preparation, mixing, extrusion, granulation and qualification test. Raw materials are composed of, by mass, 45-55 parts of polyvinyl chloride resin, 20-30 parts of a plasticizer, 8-10 parts of a filler, 5-8 parts of nano rubber particles, 3-5 parts of a stabilizer, 3-5 parts of a fire retardant, 3-5 parts of a lubricant Hst1, 1-2 parts of calcium oxide, 1-2 parts of nano calcium carbonate, 1-2 parts of a viscosity reducer, and 1-2parts of other additives P-830. The production process of the high-flame-retardant and oil-resistant PVC particles is simple, the compatibility of the substances is significantly improved through thefiller, the oil resistance and cold resistance of PVC are improved through the nano rubber particles, the flame resistance of PVC is improved through the fire retardant, the formula of the raw materials is reasonable, all components are good in compatibility, play their own roles and have synergistic effects, and the prepared PVC particles have good flame resistance, oil resistance, cold resistance, mechanical properties and wide application prospects.

The invention relates to a nano modified high-impact geogrid. The nano modified high-impact geogrid is processed by the following raw material components in parts by weight: 70-80 parts of PP (polypropylene) resin, 20-30 parts of MLLDPE (metallocene polyethylene), 8-10 parts of maleic anhydride-grafted propylene, 8-10 parts of talcum powder, 1-2 parts of titanate, 5-10 parts of nano strong powder, 0.2-0.4 part of ZnO, 0.3-0.5 part of an antioxidant 1010 and 15-20 parts of modified filler. A preparation method of the nano modified high-impact geogrid comprises the following steps: mixing and extruding materials to obtain melt, molding the melt into a plate by virtue of a three-roller calender, punching the plate by virtue of a punching machine, stretching a pore plate after heating to obtain the geogrid. The geogrid processed by the preparation method disclosed by the invention has good mechanical performance, high impact strength and low cost.

Object: To provide a resin composition having excellent oxygen barrier properties and transparency, and high tensile elongation at break; a molded article, a film, and a multilayer film.

Resolution means: A resin composition including from 20 to 80 parts by mass of a polyamide resin (A) and from 80 to 20 parts by mass of a polyamide resin (B); wherein more than 35 mol % of all the constituent units of the polyamide resin (A) are constituent units including an alkylene chain having from 2 to 6 carbons; the polyamide resin (B) includes constituent units derived from a diamine and constituent units derived from a dicarboxylic acid, wherein 70 mol % or more of the constituent units derived from a diamine are derived from a xylylenediamine; from 30 to 70 mol % of the constituent units derived from a dicarboxylic acid are derived from an α,ω-linear aliphatic dicarboxylic acid having from 4 to 8 carbons; from 70 to 30 mol % of the constituent units derived from a dicarboxylic acid are derived from isophthalic acid, with the proviso that the total does not exceed 100 mol %; and the polyamide resin (B) further includes phosphorus atoms in a ratio of 3 to 300 mass ppm, and calcium atoms so as to be the ratio that phosphorus atoms:calcium atoms of 1:0.3 to 0.7.