32results about How to "Low permanent deformation" patented technology

The high-strength flooring rubber mainly comprises (by mass portions) styrene-butadiene rubber 60-100 parts, natural rubber 40-60 parts, butylbenzene rubber with high styrene content 40-60 parts, stearic acid 3-8 parts, zinc oxide 3-6 parts, accelerating agent 3-7 parts, anti-aging agent 0.5-1.5 parts, Coumarone 3-8 parts, paraffin chloride 1-2 parts, pottery clay 100-200 parts, white carbon black 80-120 parts, light calcium 100-200 parts, coupling agent 3-8 parts, phenol resin 5-10 parts, HMT 0.5-1.0 part, sulfur 5-8 parts, decabromodiphenyl oxide 5-15 parts, antimony trioxide 5-15 parts, and aluminum hydroxide 30-100 parts. The preparation consists of plasticization, adaptation, pugging, calendaring, extrusion, modeling and sulfidization.

The invention discloses a colorful TPU (thermoplastic polyurethane) foaming material, a preparation method and an application. The colorful TPU foaming material comprises colorful foaming particles or colorful foaming sheets, pigment concentration of the colorful foaming particles or the colorful foaming sheets is 0.01%-5% by weight, pigments inside and outside the colorful TPU foaming material have the same concentration, the hardness of the colorful TPU foaming material is HA 5-65, the density is 0.05-0.5 g/cm<3>, and the average cell size is smaller than 100 mu m. The colorful TPU foaming material has the characteristics of good inside and outside uniformity, absence of wrinkles on the surface and the like.

The invention relates to a self-lubricating addition type liquid silicone rubber. The liquid silicone rubber comprises, by weight, 120-200 parts of an alkenyl-containing polysiloxane, 1-15 parts of ahydrogenated polysiloxane, 30-80 parts of fumed silica, 10-30 parts of a silazane white carbon black treatment agent, 1-30 parts of methyl phenyl silicone oil, 0.004-0.06 part of a Si-H addition catalyst and 0.03-0.6 part of an inhibitor. The types and amounts of the alkenyl-containing polysiloxane and the hydrogenated polysiloxane in a base rubber, a component A and a component B are screened, and the oil seepage rate and the product performances are controlled through raw material screening and formula design, so the addition type liquid silicone rubber has a high tearing strength (greater than or equal to 45 kN/m) and a low permanent compression deformation rate (less than or equal to 20%), also has stable oil seepage, and can keep a self-lubricating effect for a long time. A preparation method of the self-lubricating addition type liquid silicone rubber has the advantages of simplicity, cheap and easily available raw materials, and suitableness for industrial production.

The invention discloses a single-layer elastic film composition, a multi-layer elastic film composition and an elastic sheet. A single-layer elastic film can be formed by at least one elastic polymer with an olefin basis and at least one effective polymer. A multi-layer elastic film can be composed of a first layer and a second layer, wherein the first layer contains at least one elastic polymer with an olefin basis and at least one first slip agent; and the second layer contains at least one elastic polymer and at least one second slip agent. The single-layer elastic film or multi-layer elastic film can be combined with at least one elastic carrier to form one elastic sheet.

The invention discloses a metal weaving type conductive silica gel sleeve and a preparation method thereof. The conductive silica gel sleeve comprises a core, a binding layer and an electromagnetic shielding layer which are sequentially arranged from inside to outside, the core is a pipe formed by extruding high-elasticity silicone rubber by an extrusion machine, the binding layer is a high-strength organic silicon binding layer coated on a surface of the core, the thickness of the binding layer is 0.05-0.1 millimeter, and the electromagnetic shielding layer is a metal weaving layer combined onto the surface of the core by the binding layer. By the metal weaving layer on the surface, the volume resistivity of the conductive silica gel sleeve is small, and the surface resistance is lower tobe 10 milliohms; with the core formed by extruding the high-elasticity silicone rubber, the conductive silica gel sleeve has very good rubber elasticity, and the permanent deformation rate after compression is lower to be 5%; and by combining the core and the metal weaving, the weight of the conductive silica gel sleeve is reduced by 20% compared with the same-volume metal shielding pipe.

The invention discloses a silicone-rubber-based flexible neutron shield material and a preparation method thereof. The silicone-rubber-based flexible neutron shield material comprises, by weight, 100parts of phenyl silicone rubber base material, 128-174 parts of functional boride and 15-23 parts of hydroxyl silicone oil compound. The silicone-rubber-based flexible neutron shield material and thepreparation method thereof have the advantages that the phenyl silicone rubber having certain irradiation resistance is used as the matrix, the processed functional boride is evenly dispersed into thephenyl silicone rubber, and gamma radiation crosslinking is performed to obtain the silicone-rubber-based flexible radiation shield material excellent in comprehensive performance; the flexible material has an excellent neutron shield effect and good mechanical and thermal performance and environment friendliness and can be cut into optional shapes according actual application scenes.

The invention relates to a high-fatigue-life rubber belt and a preparation method thereof. The high-fatigue-life rubber belt formula is mainly composed of the following components in parts by weight:95 to 50 parts of natural rubber NR, 5 to 50 parts of trans-butadiene-isoprene copolymer rubber TBIR, 2-30 parts of white carbon black SiO2, 0.2-3 parts of silane coupling agent Si69, 1-5 parts of zinc oxide-80, 1-8 parts of stearic acid, 0-10 parts of a softener, 0.3 to 6 parts of sulfur, 0.3 to 5 parts of an accelerant, 1 to 8 parts of an anti-aging agent, 0-5 parts of a scorch retarder and 0-8parts of a color masterbatch. According to the invention, the trans-butadiene-isoprene copolymer rubber TBIR and the natural rubber are combined and used, and silicon dioxide is added as a reinforcingagent, and the bending fatigue performance of the vulcanized rubber is improved by more than 50%, the permanent deformation rate is reduced by more than 5%, the wear resistance is improved by more than 10%, and the friction performance is excellent. All performances of the high-fatigue-life rubber belt provided by the invention can meet the use requirements of household and commercial running belts and conveying belts.

The invention relates to the technical field of damping materials, in particular to a polyurethane/epoxy sliding ring damping coating and a preparation method thereof. The coating is prepared from the following components: 6-10 parts of polyurethane, 1-5 parts of epoxy resin, 2-10 parts of polyrotaxane and 0.02-0.05 part of a curing agent. According to the invention, polyrotaxane is added into polyurethane epoxy resin, and a cross-linking point of polyrotaxane and a main chain of a network molecule can slide, so that all molecular chains of a network structure can be subjected to external force, the stress concentration of the molecular chains is reduced, and the permanent deformation rate of the coating is reduced. Moreover, the amount of the used epoxy resin is less than that of the polyurethane, so that the epoxy content in the coating system is low, an epoxy network is not easy to form, or the formed epoxy network is few, the movement of the polyurethane network is not hindered, and the coating system is high in motility, high in friction energy consumption, high in material damping peak value and wide in high-damping temperature range.

The invention relates to a novel combined mine car colliding, which consists of an outer ultra high molecular weight polyvinyl plastic alloy wear layer and an inner polyurethane buffer lining layer, wherein the ultra high molecular weight polyvinyl plastic alloy wear layer encircles the polyurethane buffer lining layer. By wear resistance, impact resistance and elastic deformation memory restoration of high molecular materials, the novel combined mine car colliding replaces the traditional steel colliding to be applied to a mine car, has high wear resistance, low permanent deformation, low noise and high safety, and can offset most impact force during collision to reduce the shock of the mine car.

The invention relates to the technical field of cable materials, and provides a flexible high-temperature-resistant transmission signal cable. The cable comprises a center conductor and a protective sleeve wrapping the center conductor. The protective sleeve comprises the following components in parts by weight: 40-60 parts of nitrile rubber, 25-30 parts of fluorinated silicone rubber, 2-4 parts of benzoyl peroxide, 35-45 parts of polyvinyl butyral, 3-8 parts of coumarone indene resin, 10-15 parts of modified vermiculite, 10-20 parts of a flame retardant, 0.5-1 part of cyanogen-containing silicone oil, 1-3 parts of an ultraviolet light absorber, 3-6 parts of a heat stabilizer and 8-14 parts of glass fibers. The invention further provides a preparation method of the flexible high-temperature-resistant transmission signal cable. According to the technical scheme, the problem that a cable protection sleeve is poorer in flexibility and high temperature resistance is solved.

A method to manufacture a steel wire spring core for a mattress or for seating is described, which comprises the steps of providing a carrier comprising steel wire; repeatedly cold coiling a steel wire spring from steel wire taken from the carrier; and connecting a series of the coiled steel wire springs to each other. The steel wire has a diameter d between 0.8 and 4.5 mm; and has a drawn pearlitic microstructure. The steel wire comprises a steel alloy having a carbon content between 0.35 wt % and 0.85 wt %. The steel wire on the carrier has a ratio—expressed as a percentage—of the yield strength R_{po 2} (in MPa) over the tensile strength R_m (in MPa) higher than 85%.

The invention discloses an LED lamp for a distribution box. According to the LED lamp for the distribution box, a connecting gap cannot exist between a lamp body and a light transmitting plate when the light transmitting plate is collided mistakenly. The LED lamp for the distribution box comprises the lamp body (1) and the light transmitting plate (2). An annular protrusion (3) is arranged at the end of the lamp body (1). A first annular elastic body (4), the light transmitting plate (2), a second annular elastic body (5) and the annular protrusion (3) are sequentially sealed and bonded from top to bottom. The outer side of the first annular elastic body (4) and the outer side of the second annular elastic body (5) are both sealed and bonded with the inner side face of the lamp body (1). The first annular elastic body (4) and the second annular elastic body (5) are made of the same materials, and the materials comprise, by weight, 40-45 parts of chlorinated polyethylene, 10-15 parts of natural rubber, 5-8 parts of butadiene-styrene rubber, 3-5 parts of aromatic hydrocarbon oil, 1-2 parts of anti-aging agents, 0.5-1.5 parts of sulphur and accelerant, 0.3-0.4 part of co-crosslinking agent, 0.5-2 parts of zinc oxide and 20-30 parts of carbon black.

The invention discloses a bacteriostatic nontoxic hydrogel dressing and a preparation method thereof. The hydrogel dressing comprises a hydrogel matrix and a bacteriostatic agent, and the bacteriostatic and nontoxic hydrogel dressing is prepared from the hydrogel matrix and the bacteriostatic agent through physical crosslinking. The hydrogel matrix is polyvinyl alcohol or agarose, and the bacteriostatic agent is bacteriostatic peptide. The preparation method comprises the following steps: S1, weighing the hydrogel matrix, pouring into a container, adding deionized water, stirring until the medicine is completely dissolved, and stopping heating to obtain a hydrogel matrix solution; S2, after the hydrogel matrix solution obtained in the step S1 is cooled to room temperature, adding antibacterial peptide, and stirring; after bubbles in the product disappear, freezing for 10-12 hours, and unfreezing to obtain antibacterial peptide hydrogel; and S3, after one side of the hydrogel is coated with an outer layer film, pasting release paper, and shearing to obtain the bacteriostatic and nontoxic hydrogel dressing. The hydrogel dressing prepared by the invention has a relatively good antibacterial effect, is non-toxic and can effectively avoid wound infection.

The invention discloses a low permanent deformation reel cable sheath material. The material comprises CPE, CR, EVA, carbon black, talcum powder, calcium carbonate, silicon dioxide, antimony trioxide, magnesium oxide, DOA, an anti-aging agent RD, TAIC and DCP. The CPE, the CR and the EVA are used together, so that the permanent deformation rate of the sheath material is increased, and the material formula cost is reduced; the talcum powder and the calcium carbonate are used together, the talcum powder can improve the tensile strength of the material, the calcium carbonate can improve the crosslinking degree of the material, and due to the fact that the unit prices of the two fillers are low, the material cost can be greatly reduced; the carbon black obviously enhances the tensile strength of the material, and the silicon dioxide obviously enhances the tear strength of the material.