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205results about How to "Improve lateral strength" patented technology

Composite material core used for enhanced cable, preparation process thereof and enhanced cable

InactiveCN102024517AImprove lateral strengthImprove fatigue resistance and fatigue resistanceInsulated cablesCable/conductor manufactureElectrical conductorFiber bundle
The invention relates to a composite material core used for an enhanced cable, a preparation process and the enhanced cable. The composite material core comprises an inner core and an outer layer, wherein the inner core is composed of fiber and thermosetting resin; the outer layer comprises a fiber woven pipe and thermosetting resin which are composited to form the outer layer; and the fiber woven pipe of the outer layer is a network structure which is woven by interlacing a plurality of fiber bundles. The transversal strength of the composite material core is greatly improved by the interlaced network structure, the fatigue resistance of the composite material core is greatly improved, and the service life of the composite material core and a power transmission cable is prolonged; and the problem that the composite material core is broken when the composite material core is stranded, wound and extruded by a conductor in the manufacturing process of the cable is completely avoided. As the fiber woven pipe is adopted by the outer layer, the flexibility of the outer layer is greatly increased by the interlaced and woven structure, thereby meeting the requirement of manufacturing composite material core with major diameter.
Owner:JIANGSU JIATAI TECH MATERIAL

Short-fiber-reinforced pultrusion composite material solar energy assembly frame and preparation method thereof

The invention discloses a short-fiber-reinforced pultrusion composite material solar energy assembly frame, which is characterized by being produced through a pultrusion method and being composed of following components, by volume: 5-10% of short fibers, 50-80% of continuous fibers and 10-40% of resin. The invention also discloses a preparation method of the solar energy assembly frame. In the method, a short fiber reinforcement body is added for solving a problem of insufficient strength in the vertical direction of the fiber when a continuous reinforced pultrusion composite material is used as the solar energy assembly frame. The continuous fiber is impregnated in the resin mixture, in which 5-10% by volume of the short fibers is dispersed homogeneously, and then the impregnated continuous fiber is injected into a die for obtain the solar energy assembly frame through pultrusion. The short fibers can form an overlap joint structure among the continuous fiber so that the performance in the vertical direction of the fibers in the material can be improved. Not only is the excellent performance in the direction in parallel with the fibers ensured, but also an excellent mechanical performance in the vertical direction of the fibers can be ensured at the same time.
Owner:哈尔滨生材新材料科技发展有限公司

PLA (polylactic acid) non-woven fabric diaper with high breathability and preparation method thereof

The invention discloses a PLA (polylactic acid) non-woven fabric diaper with high breathability. The PLA non-woven fabric diaper comprises a surface material, a water absorption core layer and a bottom membrane from inside to outside, wherein the surface material adopts a three-layer structure consisting of an upper layer, a middle layer and a lower layer, PLA short fiber webs are arranged on the upper layer and the lower layer, PLA long fiber non-woven fabric is arranged on the middle layer, and guide holes with pore diameters of 10-30 meshes are distributed on the PLA long fiber non-woven fabric. According to the diaper with the high breathability, upper-layer PLA short fiber non-woven fabric in three-layer PLA fiber webs is adopted as a surface layer, lower-layer PLA short fiber non-woven fabric is adopted as a guide layer, middle PLA filament non-woven fabric is adopts as an isolated layer, the three layers are bonded into integral non-woven fabric in a hot melting compound manner, the method for compounding the guide layer and the non-woven fabric on the surface layer through glue spraying in the production process of conventional diapers is not required, and the breathability between the surface layer and the non-woven fabric on the guide layer is greatly improved.
Owner:马鞍山同杰良生物材料有限公司

System and process for manufacturing carbon fiber composite core of electric transmission line

InactiveCN102039681AQuality improvementSolve the difficult problem of pultrusionFiberWinding machine
The invention relates to a system and process for manufacturing a carbon fiber composite core of an electric transmission line. The invention is characterized in that the system comprises a yarn frame, a yarn-collecting board, a preheater, a double-roller constant-temperature replaceable glue tank, a glue-squeezing device, a primary preforming device, a carbon fiber preheating mold, a secondary preforming and coating device, a curing mold, a postheating oven, an air cooling device, a tractor and a winding machine which are sequentially connected, wherein a cloth guide frame is mounted above the secondary preforming and coating device, the carbon fiber preheating mold and the curing mold are respectively sheathed with a heater, and both sides of the carbon fiber preheating mold are provided with glass fiber yarn guide boards. In the preparation method provided by the invention, repeated experiments are carried out on the high-performance resin system, and the outermost layer is coated with the glass fiber cloth by fully considering characteristics of carbon fibers and high-strength glass fibers, thereby enhancing the transverse strength of the product, improving the cracking resistance of the product and realizing the feasibility of the process. Thus, the invention solves the problem that high-performance resin is difficult to pultrude.
Owner:西安联瑞科技实业有限责任公司

High-puncture-strength lithium ion battery diaphragm and preparation method thereof

The invention relates to the processing field of lithium ion battery diaphragms and discloses a high-puncture-strength lithium ion battery diaphragm. The high-puncture-strength lithium ion battery diaphragm consists of 75 to 99.9 weight percent of main body olefin resin and 25 to 0.1 weight percent of an auxiliary additive. The invention further discloses a method for preparing the high-puncture-strength lithium ion battery diaphragm, which comprises the following step: carrying out transverse stretching on a micropore diaphragm which is longitudinally stretched, wherein the traveling speed of the micropore diaphragm is 0.5 to 200 mm/min, the stretch temperature is 100 to 150 DEG C and the stretching multiplying power is 0.5 to 3.0. According to the invention, one step of transversely stretching is added on the basis of one-way stretching in an existing dry method; and by transverse stretching according to a certain ratio, under the condition of not influencing basic performance of the micropore diaphragm (air permeability, porosity and the like), the transverse intensity of the micropore diaphragm is improved, i.e. the puncture-resistant intensity of the micropore diaphragm is improved, so that the diaphragm can be better suitable for assembling of a battery, the micro short circuit problem caused by lithium dendrite puncture is reduced or avoided and safety of the battery is improved.
Owner:SHENZHEN SENIOR TECH MATERIAL

Method for forming polyolefin microporous membrane and application thereof

The invention provides a method for forming a polyolefin microporous membrane, which comprises the following steps of: performing melt extrusion and casting on polypropylene at the temperature of between 180 and 260 DEG C to obtain a polyolefin cast base membrane; longitudinally stretching the polyolefin cast base membrane at the temperature of between 10 and 150 DEG C to obtain a primary polyolefin microporous membrane with micropores; and performing heat setting treatment on the primary polyolefin microporous membrane at the temperature of between 110 and 150 DEG C, and transversely drawing the primary polyolefin microporous membrane to obtain the polyolefin microporous membrane. The invention also provides application of the method for forming the polyolefin microporous membrane in preparing a diaphragm or a lithium ion battery. In the method, based on the primary microporous membrane obtained by longitudinal stretching, the primary microporous membrane is transversely stretched at the predetermined temperature, and finally pores of the polyolefin microporous membrane become circular and are enlarged, so the air permeability of the polyolefin microporous membrane is improved, and the transverse strength of the microporous membrane is improved.
Owner:SHENZHEN SENIOR TECH MATERIAL

Fiber-reinforced polyurethane foamed and synthesized sleeper and preparation method thereof

The invention discloses a fiber-reinforced polyurethane foamed and synthesized sleeper and a preparation method thereof. The sleeper comprises a body formed by polyurethane resin in a one-time lamination manner, wherein multiple layers of composite felts with a transverse reinforcing effect are transversely arranged in the body, and a fiber yarn layer with a longitudinal reinforcing effect penetrates into the polyurethane resin between two adjacent composite felts; the fiber yarn layer and the composite felts account for 65%-75% of the total weight of the sleeper; the polyurethane resin accounts for 25%-35% of the total weight of the sleeper, and the density of the sleeper is 0.6g / cm<3>-1.6g / cm<3>; and the sleeper is prepared through combination of a double-steel belt laminating machine and a multilayer synchronous glue injection primary formation. According to the fiber-reinforced polyurethane foamed and synthesized sleeper, gum dipping is relatively adequate and uniform, so that thetransverse strength of the sleeper is enhanced, and the cracking phenomenon of a product during punching and indenting can be avoided; and the production process is simple, the equipment input is reduced, the production cost is lowered, and the production efficiency is improved.
Owner:铁科腾跃科技有限公司
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