48results about How to "Good compression elasticity" patented technology

The invention relates to aqueous polyurethane superfine fiber synthetic leather and a preparation method thereof. The preparation method comprises the following steps of: firstly, adding the following components according to parts by weight, i.e. 2-5 parts of foaming agents, 50-200 parts of water, 2-3 parts of foam stabilizers and 0-3 parts of waterborne colorants, into 100 parts of aqueous anionic polyurethane dipping sizing agents, and stirring the components and the sizing agents uniformly at high speed by using a blender so as to prepare a sizing agent; secondly, dipping non-woven fabricsin the sizing agent, scrapping the surface of the fabrics and keeping partial cells; thirdly, solidifying aqueous polyurethane on the dipped non-woven fabrics through aqueous coagulating liquid so asto form cells; fourthly, carrying out water scrubbing after aqueous polyurethane resin is completely solidified, and drying the aqueous polyurethane resin by an infrared drying oven so as to obtain base cloth; fifthly, treating the dried base cloth through an alkali reducing process; sixthly, treating the base cloth treated through the alkali reducing process through an postprocessing process; and seventhly, preparing the obtained base cloth into the synthetic leather. The aqueous polyurethane superfine fiber synthetic leather is prepared by the method.

The invention relates to a water-based polyurethane superfine fiber synthetic leather and a preparation method thereof. The preparation method comprises the following steps: 1) adding 4-8 parts by weight of a foaming agent, 50-200 parts by weight of water, 1-6 parts by weight of a foam stabilizing agent and 0-3 parts by weight of a water-based colorant into 120 parts by weight of a water-based anionic polyurethane impregnating slurry, and uniformly stirring at a high speed by a stirrer, to obtain a slurry; 2) impregnating a non-woven fabric in the slurry, scraping the surface flatly, and keeping a part of foam pores; 3) adopting a water-based solidification liquid to solidify water-based polyurethane of the impregnated non-woven fabric, and after the water-based polyurethane is solidified, forming foam pores; 4) after the water-based polyurethane resin is completely solidified, washing with water, drying by an infrared drying box, and thus obtaining base cloth; 5) carrying out an alkali deweighting process of the dried base cloth; 6) carrying out a posttreatment process of the base cloth obtained after the alkali deweighting process, and 7) preparing the synthetic leather from the obtained base cloth. The water-based polyurethane superfine fiber synthetic leather is prepared by the above preparation method.

A scaffold for tissue culture and cell culture and for producing implant materials, in particular bone, cartilage or skin replacements or extra-corporal organ replacements or for other applications in medicine or biotechnology is made of biocompatible materials. It has at least one base material which is electrostatically flocked with fibers on at least one side. Through the electrostatic flocking the fibers are arranged almost perpendicularly on the surface of the base material and exhibits a high fiber pull-out resistance. The scaffold provides an elastic growth lattice, which is stable against compression, for cell colonization in vitro or the ingrowth of cells in vivo. Implants or implant materials can be produced with the scaffold.

The invention belongs to high polymer fire-proof sealing materials and relates to a silicone foam material and a preparation method thereof. The material has the starting material formulation as follows based on parts by weight: 10-90 parts of alpha, omega-dihydroxyl polysiloxane, 1-10 parts of emulsifiers, 10-90 parts of fillers, 20-50 parts of flame retardants, 1-10 parts of cross linkers, 1-5 parts of catalysts and 5-15 parts of foaming agents. The silicone foam body of the invention is free from impurities, cracks and obvious coarse pores, has fine stretching property, pressure elasticity, toughness, water and air tightness, has heat insulation and refractory oxidation functions, can compensate mechanical displacement caused by mechanical pipeline vibration and building subsidence, has good sealing property, has fine adhesive properties to various metallic and non-metallic materials, has no corrosivity and toxic and harmful components, produces no toxic gas and is secure to human bodies.

The invention discloses a high performance flexibility heat-resisting material, comprising PBO staple fibre yarn and stainless steel fibre yarn, wherein, the number of the stainless steel yarn is 5-50Nm and the diameter is 6-50 mu; and the number of PBO fibre yarn is 5-60 Ne, the content of PBO staple fibre yarn is 20% to 80% and the content of stainless steel fibre yarn is 80% to 20%. The preparation process of the material is as follows: firstly taking the stainless steel fibre yarn as the core yarn, and winding the PBO staple fibre yarn spirally on the stainless steel fibre yarn to form cladding yarn; then entwisting the cladding yarn into two threads; and finally weaving the threads into knitting fabric to obtain the finished products. The invention has the beneficial effects of integrating the advantages of PBO fibre and stainless steel fibre, having high strength, high shock resistance, high buffering, high heat resistance and high corrosion resistance, being very flexible, andhaving long service life and low cost.

The invention discloses a production technology of a high-performance composite material based on Chinese hemp fibers. The production technology comprises the steps of firstly, Chinese hemp fiber pretreatment, specifically, the process comprises the steps of (1) mechanical neatening operation; (2) acid pickling operation; (3) enzyme cold heaping operation, specifically, by the mass percentage, 0g/L-5g/L of degumming compound enzymes, 2g/L-4g/L of wetting softening agents and 1g/L-2g/L of metal ion complexing agents are heated to enable the temperature to range from 35 DEG C to 40 DEG C under the condition that the bath ratio is 1:5-20, the temperature is kept for 12-60 hours, and then water cleaning operation is conducted for 1-2 times; (4) oxygen bleaching operation; (5) water cleaning operation; and (6) softening operation, specifically, by the mass percentage, 5g/l-10g/l of elastic finishing agents are added, the temperature is increased to range from 30 DEG C to 50 DEG C, and the temperature is kept for 20 minutes; and secondly, composite material forming, specifically, pre-opening treatment, roller carding treatment and stretch-breaking treatment are conducted, the Chinese hemp fibers which are subjected to stretch-breaking treatment is subjected to opening treatment, low-melting point fibers are subjected to opening treatment, the Chinese hemp fibers and the low-melting-point fibers are subjected to carding treatment respectively, cross laying treatment and needling treatment are conducted, and finally, the fibers are dried to form the high-performance composite material. The utilization rate of Chinese hemp raw materials is effectively improved, and the comprehensive excellent performance of compression resistance, elasticity, breathability, flame retardance andthe like is achieved.

The invention provides a fire-resistant silicone blocking material, which relates to a fire-resistant blocking material for seams when pipelines pass walls. The fire-resistant blocking material contains no toxic component, is fire resistant, of stretching and compression elasticity, can compensate the displacement caused by vibration in mechanical pipelines and settlement of buildings, and are easy for maintaining pipelines and cables. The invention uses silicon oil, silica gel, color additive, reinforcing agent, structure controlling agent, retardant, catalyst and solvent, and is characterized in that the substrate gel is synthesized by silica gel, silicone oil, reinforcing agent, structure controlling agent and solvent. At using, a black even thick gel that is prepared by synthesizing the substrate gel, silicone oil and color agent is mixed at 1:1 proportion with a white even thick gel that is prepared by synthesizing the substrate gel, silicone oil, retardant, catalyst and solvent, then they are vulcanized and foamed to form an elastic foam body. The invention is for blocking in a fire resistant way the seams when pipes, cables, vent tubes pass walls.

The invention relates to a conductive porous pressure-sensitive metamaterial with a negative Poisson's ratio characteristic and a preparation method and application thereof, and belongs to the field of sensing material and sensing device research. The conductive nano material is mixed with an organic cross-linking agent, and hydrothermal reaction is performed to form a uniformly dispersed aqueous solution; a porous block material with a symmetrical concave honeycomb-shaped micropore structure is formed through a directional freeze-drying technology; through heating and roasting, the nanometer material and the organic cross-linking agent form a cross-linked network. When the porous metamaterial disclosed by the invention is pressed, bidirectional shrinkage is caused by the negative Poisson's ratio, so that the density of the metamaterial and the number of conductive paths are quickly increased, and the pressure-sensitive characteristic, the compression elasticity, the impact resistance and other mechanical properties of the metamaterial are remarkably improved. The invention also relates to an ultra-sensitive flexible pressure sensor based on the conductive porous metamaterial.

Disclosed are an artificial leather that comprises two or more types of short fibers made of different components and thus exhibits superior texture, flexibility, breathability and fullness and enables great weight reduction, and a method for manufacturing the same.

The artificial leather includes a non-woven fabric having a fineness of 0.001 to 0.5 denier, and a polymeric elastomer impregnated in the non-woven fabric, wherein the short fibers are two or more types of polyester short fibers having different numbers of repeat units of —CH₂—.

The invention provides a preparation method of a composite sponge with a graphene and three-dimensional polypyrrole skeleton. The method comprises the following steps of first, washing nickel foam clean with absolute ethyl alcohol, acetone and a deionized water solution, and drying the washed nickel foam for use; second, cutting the nickel foam which is washed clean to the needed size, placing thenickel foam into a 0.3 M NaClO4 solution containing 5% (volume ratio) of a pyrrole solution to use the nickel foam as a working electrode, using a platinum wire as a counter electrode, and using a calomel electrode as a reference electrode; third, taking out a black complex of polypyrrole and nickel foam subjected to electroplating, washing the complex in deionized water to remove unoxidized pyrrole monomers on the surface of the complex, and placing the complex which is washed clean into a 1 M FeCl3 solution to be etched; and fourth, air-drying the complex at the room temperature after washing the complex in deionized water, and obtaining the three-dimensional polypyrrole skeleton. The preparation method of the composite sponge with the graphene and three-dimensional polypyrrole skeletonis easy to operate.

The invention discloses an anti-theft device for a power cable, which can timely and reliably discover abnormity along the cable erection direction, can perform evidence collection, warning and anti-disassembly and anti-theft on external damage, reduces the theft probability, and effectively protects the power cable. Two adjacent telegraph poles are respectively provided with a monitoring assembly used for monitoring that a thief gets close to the cable; an anti-theft sensing assembly is hung at the middle position of the cable on the two adjacent telegraph poles; the top end of each telegraph pole is further provided with a pulling anti-theft assembly used for monitoring cable pulling. The monitoring assembly comprises a laser monitoring assembly and a visual monitoring assembly; the laser monitoring assembly comprises a lower box body, and one side surface of the lower box body is provided with a laser receiving assembly used for receiving laser signals of the laser monitoring assembly on the previous telegraph pole. The other side face of the lower box body is provided with a laser emitting assembly used for emitting laser to the laser monitoring assembly of the rear telegraph pole in the cable erecting direction.

The invention provides a method for preparation, characterization and performance test of graphene-graphene nanoribbon sponge in the field of chemistry. The method comprises the steps of (1) measuringthe concentrations of a graphene oxide (GO) solution and a graphene oxide nanoribbon (GONR) solution; (2) respectively extracting solutions with corresponding volumes into a mold according to a massratio of GO to GONR of 1:1, and uniformly stirring and mixing; (3) freezing the uniformly mixed GO-GONR solution in a cold well of a freeze dryer for 24 hours, vacuumizing, and starting freeze drying;(4) taking out the completely freeze-dried sample to obtain unreduced GO-GONR sponge at the moment; (5) putting the unreduced GO-GONR sponge into 90 DEG C hydrazine hydrate steam, reducing for 24 hours, cooling to the room temperature, taking out, putting into a vacuum drying oven, carrying out vacuum drying at the temperature of 100 DEG C, and cooling to the room temperature; and (6) characterizing the prepared sponge. The method is simple to operate.

The invention provides spunlace jacquard non-woven fabric and a production method thereof and relates to the technical field of nonwoven fabric production. The spunlace jacquard non-woven fabric is mainly produced by three-dimensional hollow crimped fibers, polypropylene fibers and common polyester staple fibers, wherein the three-dimensional hollow crimped fibers have curled arcs and are large incurvature radius and less prone to fatigue yield generation when being subjected to repeated compressive deformation; the common polyester staple fibers can increase the twist degree of the nonwovenfabric; the polypropylene fibers can increase the strength of the nonwoven fabric to allow the spunlace jacquard non-woven fabric to be less prone to deformation. By the arrangement, the spunlace jacquard non-woven fabric is high in static resistance, good in compression elasticity, high in fluffiness, good in dust collection effect and the like.

Provided is a nonwoven article comprising a two-dimensional nonwoven structure having a longest major surface dimension and a shortest major surface dimension. The two-dimensional nonwoven structure comprises a plurality of discontinuous polycrystalline, with aluminosilicate ceramic fibers having a length equal to the longest or shortest major surface dimension of the two-dimensional nonwoven structure or a length in between those dimensions.

The self-adjusting exhaust valve comprises a valve head, a valve rod, a valve seat, a valve sleeve and an elastic piece, the valve seat comprises a seat sleeve sleeve, a seat ring connected to the inner circle of the seat sleeve and a blade connected to the inner circle of the seat sleeve, the blade is located above the seat ring, and the valve rod is axially sleeved with the seat ring in a sealing and sliding mode. The seat ring sleeve is connected to the inner circle of the valve sleeve in a threaded mode, a plurality of spraying holes are vertically formed in the seat ring, and the spraying holes are located under the blades, so that gas leaked by the piston cylinder is sprayed to the blades through the spraying holes, the valve seat is driven to rotate relative to the valve sleeve, and then the valve seat is lifted. When high-pressure gas leaks through the gap between the valve head and the valve sleeve, the leaked high-pressure gas is sprayed out through the spraying holes to impact the blades and drive the valve seat to rotate and move upwards, then the distance between the upper end of the valve rod and the seat ring is reduced, the reset elastic force of the valve rod is increased, and the valve head can be sealed again.

A nonwoven article comprising a two-dimensional nonwoven structure or a three-dimensional nonwoven structure comprising a plurality of discontinuous polycrystalline, aluminosilicate ceramic fibers that are cohesively bonded together by a fired precursor inorganic binder, wherein each cohesively bonded discontinuous fiber is bonded to one or a plurality of other said discontinuous fibers at one ormore locations along its length.