77results about How to "Small physical and mechanical properties" patented technology

The invention relates to a rubber plastic composition, which is made from the following components of: by weight, 40-50 parts of an acrylonitrile butadiene rubber powder, 30-40 parts of a preplastic polrvinyl chloride powder, 5-15 parts of ternary copolymerized polyamide, 5-15 parts of magnesium hydroxide, 5-15 parts of antimonous oxide and 0.5-1.5 parts of a processing aid. The acrylonitrile butadiene rubber powder is made from components of: by weight, 90-98% of nitrile rubber, 0.15-1% of a vulcanizator, 0.5-3% of an anti-aging agent, 0.5-3% of an activating agent, 0.3-3% of a vulcanizationaccelerator and 0.5-1.2% of an isolating agent. The preplastic polrvinyl chloride powder is made from components of: by weight, 75-90% of a PVC resin, 0.2-1% of an antioxidant, 1-8% of a calcium zincstabilizer and 8-18% of a plasticizer DITDP diisotridecyl phthalate. The composition provided by the invention has excellent high and low temperature resistance, oil resistance, wear resistant and fire retardant performance. In addition, raw materials which are not environmentally friendly are not used. Therefore, the invention is especially applicable to be used as a sheathing compound for wire and cable.

The invention discloses a sizing formula of a flame-retarding elastic support rubber product. The sizing formula is characterized in that components of the rubber product are as follows (parts by mass of each component are shown in brackets): 21-type-322 neoprene (25-35), standard 1# natural rubber (65-75), zinc oxide (7-9), light magnesium oxide (4-6), sulfur (0.1-1.0), an accelerant CZ (1.3-1.7), an accelerant Na-22 (0.4-0.6), an ageing inhibitor 4,010 (0.8-1.2), 2,500-mesh diantimony trioxide (15-25), 2,500-mesh aluminium hydroxide (50-60) and semi-reinforcing carbon black (10-20). In the invention, unvulcanized rubber is a combination of the neoprene and the natural rubber, a vulcanizing system is a combination of metal oxide and the sulfur, a flame retardant is a combination of the diantimony trioxide and aluminium hydroxide, and the semi-reinforcing carbon black is used for reinforcing; therefore, the prepared rubber product has good physicochemical properties, especially has high oxygen index and low smoke index. The invention is applicable to preparing the elastic support rubber product used between a floor board and a floor board framework when floor boards are laid in a public place and on a passenger train, a subway as well as a bus.

The invention provides a nano-palygorskite reinforced flame retarding epoxy resin composite material which disperses the nano-palygorskite into epoxy resin matrix by means of ultrasonic dispersion by mass ratio between 1:100 and 8:100 after surface treatment is carried out to the nano-palygorskite, then mix the obtained palygorskite epoxy resin mixture with a reactive-type flame retardant by the mass ratio between 100:5 and 100:30, and casting and curing are carried out. A plurality of P-N bond intermediates formed in the reactive-type flame retardant of the invention are phosphorylating agents better than routine phosphorus compounds, and water vapor generated from nano-palygorskite acting as a synergistic flame retardant during burning is in great favor for a phosphorous flame retardant, and the reinforcement of appropriate amount of nano-palygorskite compensates for the reduction of the mechanical property of the epoxy resin caused by adding the flame retardant to some extent, serving double effect of flame retardation and reinforcement, thus, the flame retarding epoxy resin composite material of the invention has the advantages of high oxygen index, good smoke suppression effect and excellent physical and mechanical properties.

A hollow airfoil is fabricated by providing a casting mold assembly including a casting mold, a casting core, and a standoff spacer that prevents the casting core from contacting the casting mold to define a casting space. A first nickel-base superalloy is cast into the casting space and solidified to form the hollow airfoil. The presence of a through-hole extending through a wall of the hollow airfoil is identified, and the through-hole is closed by welding using a second nickel-base superalloy, without using any freestanding closure element.

The invention discloses a method for preparing renewable latex; waste latexes are sorted, cleaned and classified, then cut and crushed by an open-type rubber mixing or open-type fluted roll rubber breaking machine; the particle size of the crushed rubber compounds are 4-20-mesh granules or small strip blocks; the crushed rubber compounds are put into a self-heating mixer and are stirred, then desulfurizers are added, followed cocatalysts, promoters and softeners; the mixture is stirred constantly, then after solid tackifiers, plasticizers, active modifiers are added into the mixture, the reaction is terminated and the materials are discharged and cooled; then, the rubber compounds terminated by reactive plasticization are discharged into the cylinder of a cooling machine for cooling; after being discharged from the cylinder, the materials are continuously cooled and stacked to avoid natural burning; the plasticized rubber compounds are mixed with rubber compounds of masterbatches and added into an open-type rubber refiner for production; then finished products are obtained through kneading, refining, mixing, plasticating, defilming and packaging. The method of the invention has the advantages of low energy consumption, energy saving effect, no pollution, good physical properties, as well as simple and safe process, which enables production in normal temperature and pressure and uses waste to treat waste to achieve comprehensive utilization.

The invention discloses a special halogen-free flame-retardant master batch for polypropylene and a preparation method for the halogen-free flame retardant master batch. Components of the master batch comprise, in mass percent, 75-90% of phosphorus-nitrogen halogen-free flame retardant, 8-22% of carrier and 0.1-5% of modified ethylene bis-fatty acid amide. By the aid of the master batch, quality instability of materials due to non-uniform mixing of powder and granules is effectively avoided, easiness in generation of chippings or powder during granule cutting is avoided, production efficiency is improved, and production cost is lowered. Adopting a continuous banburying-extrusion production process leads production efficiency to be high. The master batch effectively solves the problems of easiness in moisture absorption, degradation and foaming of halogen-free flame retardant, so that storage time of the phosphorus-nitrogen halogen-free flame retardant is prolonged, and processability of the phosphorus-nitrogen halogen-free flame retardant is improved. Besides, the special halogen-free flame-retardant master batch for the polypropylene has the advantages of easiness in dispersion, high flame-retardant efficiency and low production cost, and has less influence on physical and mechanical properties, heat resistance, processability and surface color of composite materials than a special traditional halogen-free flame-retardant master batch for polypropylene.

The invention discloses electroconductive color slurry and a low-resistance polyurethane material thereof. The electroconductive color slurry is prepared from the following raw materials in parts by weight: 35-55 parts of carbon powder, 30-60 parts of ionic liquid and 0.2-1 part of dispersant. The low-resistance polyurethane material is prepared from the following raw materials in parts by weight: 100 parts of polyester polyol, 0.8-9 parts of electroconductive color slurry, 100-120 parts of isocyanate and 0.5-3 parts of catalyst. The electroconductive color slurry provided by the invention has low addition amount and good electrical conductivity; and the low-resistance polyurethane material provided by the invention is applicable to dust-free room and other clean places, and has good antistatic property, low humidity dependence and good physical and mechanical properties.

The invention provides a gutta-percha/natural latex sponge product. The gutta-percha/natural latex sponge product is prepared from the following components: gutta-percha emulsion, natural latex, a vulcanizing agent, an active agent, an accelerant, an antiager, a filler, a stabilizer, a PH value adjust, a gelatinizer, a foaming agent, a foam stabilizer, and a blowing agent in proportion, and the gutta-percha emulsion and the natural latex are correspondingly concentration emulsion. A preparation method of the gutta-percha/natural latex sponge product comprises the steps that first, the gutta-percha emulsion and the natural latex are mixed in proportion, deammoniation is conducted through a simultaneous ongoing method of mechanical stirring and air drafting, thenvarious kinds of powder typeauxiliaries and emulsifying oil auxiliaries which are grinded into dispersoid are added into a mixture latex material, after ripening, air is inflated under the mechanical stirring, foam is generatedto expand foam, after foaming, the foam is solidified with the gelatinizer, after vulcanization, washing and dewatering and drying of the solidified foam, the gutta-percha/natural latex sponge is obtained. According to the gutta-percha/natural latex sponge product and the preparation method thereof, successfully development of the gutta-percha/natural latex sponge product expands application prospects of gutta-percha, and promotes the technical progress of the gutta-percha.

The invention discloses a closed isocyanate coupling agent used for surface treatment for thermal conductive fillers and a thermal conductive insulating nylon composite material. When the coupling agent treats the thermal conductive fillers, a closed isocyanate group is not unblocked and generates a chemical bonding or physical adsorption action with the surfaces of the thermal conductive fillers. In the melting process, the isocyanate group can be unblocked and chemically reacts with amidogen or carboxyl on a nylon molecular chain end. The thermal conductive insulating nylon composite material comprises 100 parts of nylon, 25-40 parts of modified thermal conductive insulating filler, 5-25 parts of a flexibilizer and 1-10 parts of an addition agent. The materials are added into a high-speed mixing machine for mixing and then are extruded to obtain the thermal conductive insulating nylon composite material. The closed isocyanate coupling agent is used for a nylon substrate and can obviously improve the dispersity of the fillers in nylon. Meanwhile, the closed isocyanate coupling agent plays a role of chain extension, the thermal conductivity of the composite material achieves the operating requirement, the physical and mechanical properties cannot greatly decline, and actual use requirements are met.

The invention discloses a process for producing antistatic polyamide 6 (PA6) bulk yarns through a one-step process. According to the technology, the polyamide 6 (PA6) bulk yarn fibers produced by the one-step production process have excellent electrical conductivity, and the manufactured carpet is rubbed to generate static electricity so as to be timely conducted out under severe pedaling, so the carpet has excellent antistatic properties. According to the technology, the polyamide 6 conductive fibers refer to 10-20-denier polyamide 6 carbon black composite fibers, and the composite fiber refers to a core-sheath composite fiber which takes the polyethylene dispersed with carbon black as the core and takes polyamide 6 as the core, is a conductive fiber with physical and chemical performances of polyamide 6 fibers, and can finish the drafting and bulking deformation process with polyamide 6 (PA6) fibers in high-speed production process.

The invention discloses a method for preparing renewable vulcanized nitrile rubber; waste vulcanized nitrile rubbers are sorted, cleaned and classified, then cut and crushed by an open-type rubber mixing or open-type fluted roll rubber breaking machine; the particle size of the crushed rubber compounds are 4-20-mesh granules or small strip blocks; the crushed rubber compounds are put into a self-heating mixer and stirred, then desulfurizers are added, followed cocatalysts, promoters and softeners; the mixture is stirred constantly, then after solid tackifiers, plasticizers, active modifiers are added into the mixture, the reaction is terminated and the materials are discharged and cooled; then, the rubber compounds terminated by reactive plasticization are discharged into the cylinder of a cooling machine for cooling; after being discharged from the cylinder, the materials are continuously cooled and stacked to avoid natural burning; the plasticized rubber compounds are mixed with rubber compounds of masterbatches and added into an open-type rubber refiner for production; then finished products are obtained through kneading, refining, mixing, plasticating, defilming and packaging. The method of the invention has the advantages of low energy consumption, energy saving effect, no pollution, good physical properties, as well as simple and safe process, which enables production in normal temperature and pressure and uses waste to treat waste to achieve comprehensive utilization.

The invention discloses a neutral pine degreasing method. The invention comprises the following steps that: (1) degreasing fluid is dispensed; (2) the degreasing fluid is canned; (3) the degreasing processing is performed. The invention enables the pine degreasing depth to reach 5 to 6 cm, the fresh wood color of the pine is kept, the decline of the physical mechanical properties is smaller, and the requirements of the furniture can be completely satisfied. The invention is easy to realize, the operation is convenient, the production cost is low, thereby being more important, the utilization of the technology does not produce waste water, the added value of the pipe is enhanced, and more employment posts are created, and the invention is advantageous in the promotion of the harmonious development of artificial forest resources and the ecology and the society.

The invention discloses a PVC and PET anti-scratch printing sheet material. Chloroethylene resin and polyethylene glycol terephthalate are used as raw materials; through a series of processing, the printing sheet material is prepared; organic tin stabilizing agents are used; high temperature decomposition of chloroethylene resin is avoided; the stability is improved; the physical and mechanical performance reduction is avoided; bis(2-ethylhexyl) phthalate is used; the plasticity and the softness of vinyl chloride resin are improved; the fragility is reduced; the processing formation is easy; photocuring paint is used, so that the wear-resisting performance of the printing sheet material is improved; the anti-scratch function is realized; the adhesive force is improved; during the printing, falling cannot occur; nanometer silicon dioxide and nanometer negative ions are used for improving the corona resistance of the photocuring paint; through corona treatment, the adhesive force of the sheet material is improved. The manufactured sheet material cannot be easily scratched; during the printing, the falling cannot easily occur; the wear-resisting performance of the sheet material body is greatly improved; the service life is prolonged.

The invention relates to a butadiene acrylonitrile rubber sheath formula. The formula comprises the following components: 100 parts of butadiene acrylonitrile rubber, 3 parts of polystyrene, 5 parts of ultralow density polyethylene, 6 parts of chlorinated paraffin, 6 parts of polyurethane, 2 parts of butyl acetate, 6 parts of calcined clay, 3 parts of talcum powder, 4 parts of ethylene glycol, 7 parts of phthalo blue, 3 parts of ethylene-vinyl acetate and 10 parts of dicyclopentadiene. The rubber sheath formula has the advantages of low cost, reasonable proportion, excellent performance, use stability and the like, improves the production benefits of factories and reduces the consumption of rubber, and the physical and mechanical properties of rubber sheaths are not reduced.

The invention discloses a heat-resistant PC/ABS alloy material which is prepared from the following components in parts by weight: 100 parts of a common PC resin, 10-100 parts of a copolymerized PC resin, 20-60 parts of an ABS resin, 5-15 parts of a compatilizer and 0.5-1.8 parts of aids. The preparation method comprises the following steps: uniformly mixing 100 parts of the common PC resin, 10-100 parts of the copolymerized PC resin, 20-60 parts of the ABS resin, 5-15 parts of the compatilizer and 0.5-1.8 parts of the aids, and bracing and granulating by virtue of a screw extruder, thereby obtaining the heat-resistant PC/ABS alloy material. The material provided by the invention has the characteristics that the heat resistance is excellent, the vicat softening point temperature is greatly improved, and the mechanical property is excellent.

The invention provides a prickle and itch feeling-resisting finishing method for a ramie fabric by imidazole ionic liquid. The method comprises the following steps: (1) heating 1-butyl-3-methylimidazole chloride to 90 DEG C; (2) putting the ramie fabric into a 26 percent (w/w) sodium hydroxide aqueous solution, soaking for 1min, washing, and drying; (3) padding the pretreated ramie fabric into a 1-butyl-3-methylimidazole solution for multiple times, wherein pick-up is 100 percent-120 percent; (4) heating the padded ramie fabric to 100 DEG C-120 DEG C, and keeping warm for 3h; (5) taking out the ramie fabric, putting into an ethanol/water solution, solidifying for 20min, then washing, and drying. The finishing method is simple and easy, and the finished ramie fabric has good prickle and itch feeling-resistance, and also remains the good characteristic of the original ramie fabric.