47results 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.

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 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.

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.