188results about How to "Improve tensile strength at break" patented technology

The invention relates to an acrylonitrile copolymer and a preparation method and an application thereof, wherein, the mole ratio of an acrylonitrile on a molecular chain of the acrylonitrile copolymer to a second monomeric unit is 2:1 to 19:1; the formula of the acrylonitrile copolymer is that: 70.0 mol percent to 90.0 mol percent of the acrylonitrile monomer, 10.0 mol percent to 30.0 mol percent of the second monomeric unit, an evocating agent and a chain-transferring control agent respectively taking up 0.1 mol percent to 16.2mol percent and 0.05 mol percent to 5.0mol percent of the total quantity of monomers. The preparation method adopts the formula of the acrylonitrile copolymer and the following technique: a proper amount of deionized water is put in a reaction vessel and cleaned with nitrogen for 5 minutes to 400 minutes at a temperature of 0 DEG C to 70 DEG C; the evocating agent and the chain-transferring control agent are added in one time; the acrylonitrile monomer and the second monomer are put into a blending container, evenly blended and the dropped slowly into the reaction vessel; and then all reactants continue to be stirred for 20minutes to 40 minutes and the product is obtained after being filtered, cleaned with the deionized water for three times and dried in vacuum. The acrylonitrile copolymer of the invention can be produced into acrylic fiber or film with good performance through a fusion processing method.

The present invention includes an integrated (composite) watchband and process for making a watchband that integrates a high tensile strength fabric (e.g. an aramid fabric) within the watchband via an injection molding process. The resultant integrated watchband exhibits greatly increased strength while maintaining all the necessary characteristics of a conventional band.

The invention discloses a method for preparing high performance graphene-polyvinyl alcohol composite fiber, the method comprises the following steps: 1) functionalization of blocked isocyanate groupsof graphene quantum dots; 2) preparation of a spinning solution of polyvinyl alcohol-graphene quantum dots (PVA-GQD); 3) wet spinning; 4) post-treatment of nascent fibers; the method is simple, shortin process, low in cost and suitable for large-scale production, and does not require modification of existing polyvinyl alcohol wet spinning process equipment, and the prepared PVA-GQD fiber not onlyhas excellent mechanical properties and easy dispersibility, but also has a metallic luster, and is an ideal concrete reinforcement material, packaging material and clothing fabric.

Differentially densified fibrous structures, methods for making same, and processes for treating fibers used in the fibrous structures are provided. More particularly, fibrous structures comprising two or more regions, at least one of which exhibits a density that is at least 1.6 times greater than another region within the fibrous structure, methods for making such fibrous structures and non-naturally occurring fibers useful in such fibrous structures are provided.

The invention discloses a modified calcium carbonate filled PVC tubular product and a preparation method thereof. The PVC tubular product contains the following raw materials in parts by weight: 100 parts of PVC resin, 5-10 parts of bismaleimide, 3-5 parts of an acrylic acid-maleic anhydride copolymer, 1-3 parts of polyurethane propyl methyl semisiloxane, 1-2 parts of maleic acid ricinoleate, 15-30 parts of modified nano-calcium carbonate, 3-5 parts of asbestos fibers, 1-3 parts of a coupling agent, 0.5-2 parts of a cross-linking agent, 0.5-1.5 parts of an antioxidant, 0.5-1.5 parts of a stabilizer, 1-2 parts of an antibacterial agent and 3-5 parts of a processing aid. By virtue of a special raw material formula and the coordination effect of the components, the PVC tubular product provided by the invention has the advantages of high strength and tenacity, strong shock resistance, heat resistance, strong bacteriostatic and antibacterial effects, ageing resistance, good stability and the like and is unlikely to be deformed, a processing process is simple, and the PVC tubular product is relatively low in cost and has wide market prospects.

The invention discloses a modification method of calcium carbonate and application of modified calcium carbonate in PVC pipes. The method includes: firstly conducting surface modification on calcium carbonate with disodium cocamidopropyl sulfosuccinate monoester and nonylphenol polyoxyethylene ether, and then using octa(aminophenyl)silsesquioxane and sodium laureth-4 phosphate for second surface modification. The modified calcium carbonate obtained by the invention has the characteristics of high dispersibility, high toughness, weather resistance, heat resistance, high strength, high toughness, etc, as the filler of the PVC pipe system, the modified calcium carbonate can endow pipes with high strength, high toughness, corrosion resistance, good heat resistance, strong impact resistance andother performance, prolongs the service life of the pipes and widens the application fields of the pipes.

The invention provides a method for preparing a humidity-sensitive switch flexible sensing material. The method for preparing the humidity-sensitive switch flexible sensing material is characterized by specifically comprising the following steps: preparing at least one polymer solution, pouring the polymer solution into at least one composite tank, performing water bath heating on the composite tank, unwinding a carbon nano tube fiber or carbon nano tube membrane from a winding roller, leading through a leading needle, and feeding into the composite tank for combination; after the combination, performing grouting treatment through the guide needle, guiding, feeding into a heating area for drying so as to cure the polymer on the surface and inside the carbon nano tube fiber or carbon nano tube membrane, thereby obtaining the humidity-sensitive switch flexible sensing material. The humidity-sensitive switch flexible sensing material can be wound on a wire shaft connected with a motor. The humidity-sensitive switch flexible sensing material has the advantages of being low in cost, good in flexibility, good in conductivity, fiber-like, capable of being embedded into a monitored environment to be in contact with the monitored environment in all directions, and the like.

The invention discloses tri-ethylene-propylene rubber water proof coiled material that uses tri-ethylene-propylene rubber EP35 or 4045, carbon, fine particle calcium carbonate, ZnO, stearic acid, Rhine wax, anti-aging agent, accelerating agent, vulcanizing agent as raw material. The advantage of the invention is that it is water proof, damp proof, mould proof, pressure proof, acid, alkali, and salt resistant, strong adhesive force, good extension, and strong ageing resistance.

The invention provides a preparation method of an epoxy resin/MXene composite material. The preparation method comprises the following steps: preparing a single-layer MXene, determining the addition amount of the single-layer MXene, compounding the single-layer MXene and an epoxy resin material, and the like. The preparation method is simple in process, short in time, high in efficiency and low incost, and the prepared epoxy resin/MXene composite material is remarkably improved in tensile breaking strength and good in mechanical property.

The invention belongs to the technical field of specialty fibers, and particularly relates to a vertical type wet spinning method and device. The device comprises a pump shaft (1), a pump shaft clutch (2), a metering pump (3), a stock solution header pipe (4), a coagulation bath tank (5), a first-level coagulation liquid pipeline (6), a U-shaped coagulation bath pipe (7), a first draw-off godet (8), a straight coagulation bath pipe (9), an overflow port (10) and a second draw-off godet (11). The device is characterized in that the pump shaft (1) is provided with the pump shaft clutch (2), the stock solution header pipe (4) is connected with the coagulation bath tank (5) through the metering pump (3) arranged on the pump shaft clutch (2), and the first-level coagulation liquid pipeline (6) is communicated with the coagulation bath tank (5). According to the vertical type wet spinning method and device, longitudinal drawing is performed on nascent fibers through gravity by adopting the vertical type special wet spinning method, the nascent fiber drawing direction and the coagulation liquid flowing direction are consistent with the gravity direction, therefore, the influence of the gravity on molecular structure orientation is avoided, and the molecular structure orientation is more concentrated.

The invention discloses an anti-bacterial and flame-retardant PVC composite board and a processing method thereof, wherein the anti-bacterial and flame-retardant PVC composite board includes the following raw materials in parts by weight: 100 parts of PVC resin, 5-10 parts of an acrylic acid-maleic anhydride copolymer, 40-60 parts of wood meal, 40-60 parts of modified calcium carbonate, 5-10 partsof shell powder, 3-5 parts of boron nitride, 1-3 parts of aramid fibers, 2-4 parts of a foaming agent, 1-2 parts of a flame retardant, 1-2 parts of an antibacterial agent, 1-3 parts of a plasticizer,0.5-1.5 parts of a stabilizer, 0.5-1.5 parts of an antioxidant, 2-4 parts of a modifier and 3-5 parts of a processing aid. The modifier consists of octaaminophenyl cage-like silsesquioxane and vegetable oil fatty acid alkanolamide borate with a mass ratio of (1-3):1. The prepared PVC composite board has the advantages of high strength, strong impact resistance, no fission, good flame retardancy,strong antibacterial property, low water absorption rate, wear resistance, weather resistance, heat resistance, difficult deformation, aging resistance, good processing performance, simple process, low cost, and good social and economic benefits.

The invention discloses a partition plate of a lead storage battery and the lead storage battery. The constituent of the partition plate of the lead storage battery comprises glass fiber and a COPET sea-island filament, wherein the COPET sea-island filament is obtained by dissolving a PA/COPET sea-island fiber in sea. During fabrication of the partition plate of the lead storage battery, the COPET sea-island filament is added and obtained by dissolving the PA/COPET sea-island fiber in the sea; after the sea-island fiber is separate, the filament number is relatively slim, conventional spinning cannot be achieved, and thus, the partition plate has characteristic which ordinary fiver cannot possess; and compared with an ordinary AGM partition plate, the partition plate of the lead storage battery has the advantages of high acid absorption quantity, large durability, large tensile breaking strength and the like and has good application prospect.

The invention relates to a pressure-sensitive adhesive composition and an infrared transparent black adhesive tape, a preparation method thereof and application thereof. In particular, the invention relates to the technical field of bonding, relates to an infrared transparent black pressure-sensitive adhesive, and also relates to an adhesive tape containing the pressure sensitive adhesive, especially an infrared transparent black adhesive tape. The pressure-sensitive adhesive and the adhesive tape have transparency in the visible light area of 400 to 780nm significantly lower than that in the 780 to 1000nm near infrared region. In addition, the invention relates to the preparation method and application of the pressure-sensitive adhesive and adhesive tape, such as application in many fields of optoelectronics.

The invention discloses a high-strength slurry pump rubber lining which is characterized in that the rubber raw material comprises the following components: 70-90 parts of 1# natural rubber, 30-50 parts of 21-type chloroprene rubber, 2-3 parts of stearic acid, 1-2 parts of paraffin, 22 parts of 1500-type styrene butadiene rubber, 43 parts of 3707-type nitrile butadiene rubber, 37 parts of argil, 2-5 parts of vaseline, 15-25 parts of hard carbon black, 20-30 parts of calcium carbonate, 3-5 parts of zinc oxide, 4-5 parts of magnesium oxide, 0.3-0.5 part of accelerator DM (Chinese name: 2,2'-dithiodibenzothiazole, molecular formula: C14H8N2S4), 1.1-1.3 parts of accelerator TT (Chinese name: tetramethylthiuram disulfide, molecular formula: C6H12N2S4), 0.9-1.1 parts of anti-aging agent 4010 (N-cumene-N-phenylenep-phenylenediamine) and 0.9-1 part of anti-aging agent D (Chinese name: N-phenyl-2-naphthylamine, molecular formula: C16H13N). Through the invention, the tensile breaking strength of the slurry pump rubber lining is improved by changing the proportion of the polar material and polysulfur bond of the rubber material.

The invention belongs to the technical field of waterproof materials used in water conservancy projects and building projects and particularly discloses a waterproof roll free of folds and easy to weld. According to the technical scheme, the waterproof roll free of folds and easy to weld comprises a sheet, non-asphalt self-adhesive flue layers and isolating films, wherein the non-asphalt self-adhesive flue layers are attached to one side face or two side faces of the sheet, and the self-adhesive flue layers are coated with the isolating films. The sheet comprises, by weight, 65-70 parts of polyethylene, 15-18 parts of POE, 10-12 parts of EVA, 5-7 parts of polyethylene flexibilizer, 4-6 parts of maleic anhydride compatilizer and 1-2 parts of polyolefin aging-proof agent. The waterproof roll free of folds and easy to weld has the advantages that the hot melting temperature is low, both welding and construction are easy, and compared with ordinary materials, on the premise that the excellent welding effect is guaranteed, the welding temperature is lowered by 50-80 DEG C, and power consumption of a welding device is greatly reduced; meanwhile, the tensile strength at break is high, the elongation at break is high, the tearing strength is high, and chemical corrosion resistance is achieved, and the requirement for conduction in a low-temperature environment is met.

In a medical guide wire 1, a helical spring body 3 is made of austenitic stainless steel wire treated with a solid-solution procedure, and tightly drawn with a whole cross sectional reduction ratio as 90%-99.5%. A metallic wire element of the helical spring body 3 is heat treated at low temperature within a range in which a tensile rupture strength of the helical spring body 3 rapidly increases by partly or totally making use of a conductive heat generated when a core wire 2 and the helical spring body 3 are in part bonded by means of a welding member 4. This makes it possible to improve a mechanical strength property, especially a fatigue-resistant property against a repetitive bending action of the helical spring body 3.

The invention relates to a halogen-free inflaming retarding water-proof construction sheet of a weldable elastomer; TPO is taken as a matrix resin; the matrix resin is mixed with flame retardants according to a proportion; the mixed material is plasticated by two rollers under the temperature of 130 to 150 DEG C and is shaped in a hot-press way by a flat vulcanizing machine under the temperature of 160 to 170 DEG C to obtain the sheet; wherein, the flame retardants are divided into an inorganic flame retardant and an expansion flame retardant; the inorganic flame retardant is modified magnesium hydrate; expansion flame retardant is mixed and compositely prepared by monoammonium phosphate, faecula and magnesium hydrate. The halogen-free inflaming retarding water-proof construction sheet of the weldable elastomer has the advantages of effective flame retardation and excellent comprehensive mechanical property as well as being capable of improving the durability and the weatherability.