55results about How to "Increased transverse tensile strength" patented technology

The invention relates to a method for producing anti-crack bamboo sheet. It is characterized in following steps that: poaching the bamboo plane bar at the temperature as 50-95Deg. C and the density of hydrogen dioxide solution as 1.5-6.5%; drying the poached plane bar at the temperature as 45-65Deg. C and air relative humidity as 25-65%, to the water content as 5-9%; making the dried plane bar into fine plane bar to be coated with pastern; plane or side assembling the plane bars, to be compressed and shaped at the temperature as 88+-2Deg. C; the pressure of main compress unit is 0.2-0.6MPa, and the pressure of side compress unit is 5-7MPa; maintaining it for 3-7 days at the temperature as 20-30Deg. C and the air relative humidity as 20-50%. The invention has better anti-crack effect, which can be used in bamboo floor, etc.

The invention relate to a modified aramid fiber reinforced PA66 material and a preparation method thereof. The preparation method comprises the steps of modifying the aramid fibers by using microwave radiation, with radiation frequency being 0.5-5 GHZ, radiation dosage being 0.1-2 mW/cm<2> and radiation time being 1-240 s; and then processing the modified aramid fibers by using low temperature plasma, with a processing power being 10-400 W, a processing atmosphere being composed of 5-15% of hydrogen, 5-15% of fluorine and 70-90% of helium, a processing temperature being 0-150 DEG C and a processing time being 1-20 min. The surface layer and the core layer of the aramid fibers modified by the microwave radiation are crosslinked, so that transverse tensile strength of the fibers is increased; and after the low temperature plasma modification, the surfaces of the aramid fibers become rough and are rich in active free radicals and functional groups. The mechanical and wear resistant performances of the composite material prepared by blending and extruding the modified aramid fibers together with the PA66 resin through a double-screw extruder are increased by 15-20% than that of similar products at abroad, and can meet the requirements of the fields such as high speed railways and aerospace for high-performance wear-resistant components.

The invention discloses a polylactic acid membrane which comprises the following components in percentage by weight: 80-95wt% of polylactic acid and 5-20wt% of a polyester fiber, wherein the polylactic acid is selected from at least one of a levorotatory polylactic acid resin and a dextrorotatory polylactic acid resin; the melting index of the polylactic acid is 10-50g/10 minutes; the testing condition is that testing is carried out with a load of 2.16Kg at 190 DEG C; the polyester fiber is selected from one of a polyterephthalic acid propylene glycol ester fiber or polyterephthalic acid butanediol ester fiber. The polylactic acid membrane disclosed by the invention is of a cross crystal structure, and has excellent longitudinal tension strength and excellent transverse tension strength aswell. The invention further discloses a preparation method of polylactic acid. The polyester fiber is adopted as a nucleating agent, and the cross crystal structure is directly prepared in a one-waymelt tension fluid field by using a melt tension technique. Relatively high transverse tension strength can be achieved when transverse tension is not carried out, and meanwhile a relatively high crystallization degree can be achieved for the polylactic acid in the melt tension process.

The invention discloses a method for enhancing the transverse strength of an FRP (fiber reinforced plastics) pultruded profile by utilizing a weaving technology, relates to a method for enhancing an FRP material, and aims to solve the problem of low transverse strength of the FRP pultruded profile prepared by a conventional method. The method comprises the following steps of 1, preparing a resin substrate; 2, drying and arranging fibers; 3, wetting the fibers; 4, pre-forming longitudinal fibers; 5, weaving a surface layer; 6, pre-forming a woven layer; and 7, performing solidification shaping. The method for enhancing the transverse strength of the FRP pultruded profile by utilizing the weaving technology has the advantages that the transverse tensile strength of the prepared FRP pultruded profile reaches 50 to 90MPa, and is improved by 20 to 50 percent compared with that of the FRP pultruded profile prepared by the conventional method; the longitudinal tensile strength of the FRP pultruded profile reaches 600 to 900MPa; the surface layer fibers of the pultruded profile form a spiral trajectory, and are interwoven into a seamless whole.

The invention relates to a thermal treatment technology of a large-size high-strength wrought magnesium alloy forging, and particularly relates to a thermal treatment technology of a wrought magnesium alloy forging of an Mg-Al-Zn system. The implementation scheme of the invention is as follows: preserving heat of the large-size wrought magnesium alloy forging with the wall thickness of 30-100mm, the diameter (phi) of greater than or equal to 680mm and the maximum horizontal projection area of greater than or equal to 0.4m<2> at 80-100 DEG C for 36-48 hours; heating to 160-180 DEG C at a rate of 15-30 DEG C per hour, and preserving heat for 15-20 hours; and cooling to room temperature to obtain the large-size high-strength wrought magnesium alloy forging, wherein the magnesium alloy forging comprises the following elements in percentage by mass: 8.2-8.5% of Al, 0.4-0.5% of Zn, 0.2-0.25% of Mn, less than or equal to 0.05% of Cu, less than or equal to 0.005% of Ni, less than or equal to 0.15% of Si, less than or equal to 0.02% of Be, less than or equal to 0.05% of Fe, less than or equal to 0.3% of other impurities and the balance of Mg. By adopting the technology provided by the invention, the prepared large-size high-strength wrought magnesium alloy forging can meet the using requirements for the parts of the fields of transportation, aerospace and the like; and the preparation technology is simple and easy to implement, and industrial production is facilitated.

The invention relates to a CON-AID plate and a manufacturing method thereof. The CON-AID plate comprises a center base material layer, and is characterized in that a balance layer, a buffering layer and a decorative layer are sequentially arranged outside the base material layer; the balance layer is made from homogenous MDF or HDF; the buffering layer is made from dipping ecological paper; and the environment-friendly level of each layer is the E0 level. Manufacturing of the CON-AID plate includes the following steps of base material manufacturing, buffering layer manufacturing, surface layer decorative dipping paper manufacturing and CON-AID plate manufacturing. According to the CON-AID plate and the manufacturing method thereof, needed raw materials are subjected to environment-friendly control, the formaldehyde release amount achieves the E0 level, meanwhile, the subsequent painting and colored drawing process is not needed, the decorative cost is saved, and pollution is reduced.

The invention discloses a cable with high strength, comprises a plurality of protective cylinders uniformly distributed along a straight line, Between any two adjacent protective cylinder is connectedby a buff mechanism, the outer surfaces of the plurality of protective cylinders are coated with a protective layer, the protective layer is made of elastic material, a plurality of connecting bodiesare uniformly and equally spaced and fixedly connected on the annular cylinder wall in the protective cylinder, A cable body is arranged between two connectors which are optionally located in the same plane and adjacent to each other, The cushioning mechanism comprises a first connecting block and a second connecting block, wherein the cross sections of the first connecting block and the second connecting block are annular, and the first connecting block and the second connecting block are fixedly connected between two adjacent protective cylinders, respectively, and the second connecting block is interposed in the first connecting block. The connecting mechanism and the buffer mechanism consume the pull force of the cable under the harsh environment, thereby improving the tensile strength of the cable as a whole and protecting the cable.

The invention discloses high-strength high-softness high-antibacterial-performance paper for daily use and a preparation method thereof. According to the method, chitosan powder is dissolved in a lactic acid water solution, chitosan is completely dissolved, a bronopol solution is added into the mixture to be evenly mixed, then a negative ion polyacrylamide solution is dripped, a lactic acid/chitosan-bronopol nano microsphere compound is prepared through reaction, the obtained compound is sprayed to the surface of paper for daily use, and then the high-strength high-softness high-antibacterial-performance paper for daily use is obtained. By the utilization of the lactic acid/chitosan-bronopol nano microsphere compound, the paper for daily use has high strength, high antibacterial performance and high softness, the three defects that according to common paper for daily use, strength and softness are low, and no antibacterial performance exists are overcome, and high application value is obtained.

The invention discloses an embedded strip for an epoxy resin-based fiber-reinforced high-modulus wind turbine blade, equipment and a process. The embedded strip comprises a composite material body andcomposite surface felts which are arranged on the upper surface and the lower surface of the composite material body; the composite material body is a glass fiber reinforced epoxy resin composite material; and glass fibers comprise twistless roving glass fibers, bulked yarn glass fibers and glass fiber cloth, the twistless roving glass fibers and the bulked yarn glass fibers are uniformly arranged in the composite material body in multiple layers in the length direction to form a multi-layer structure, and at least one layer of glass fiber cloth is arranged in the multi-layer structure in thelength direction. The embedded strip is a high-modulus embedded strip reinforced by epoxy resin-based fibers, and the embedded strip manufactured by the method has the advantages of high modulus, certain toughness and ageing resistance, and can meet the production requirements of blades of units with the power of less than 7MW at present.

The invention discloses a preparation method for a polyolefin micro-porous membrane and a micro-porous membrane prepared by using the same. The preparation method comprises the following steps: melting, extruding, stretching and cooling polyolefin, thereby forming a nonporous membrane; after laterally stretching the nonporous membrane, performing layering and thermal treatment on a lamella; and after longitudinally stretching the nonporous membrane acquired from the step b, performing thermal treatment on the nonporous membrane. The prepared polyolefin micro-porous membrane contains the holes, longitudinal and lateral length-diameter ratio of which is (1.1:1)-(5:1); the longitudinal and lateral tensile strength ratio is (1.2:1)-(4:1); the fluctuation range of thickness is equal to or morethan -2.5% and equal to or less than +2.5%; the longitudinal thermal contraction is equal to or less than 2%; and the lateral thermal contraction is equal to or less than 1%. The preparation method for the polyolefin micro-porous membrane has the advantages that the production facility is simple, the cost is low, the environment is protected, the prepared membrane contains the holes having a shape approaching to ellipse and meanwhile has higher lateral tensile strength, better tearing strength, small contractibility rate and small thickness fluctuation, no crystal form nucleating agent or hole-forming material capable of forming holes is added in the preparation process, and the like.

The invention discloses an aluminum-wood water heating system and a paving method thereof. The aluminum-wood water heating system comprises a heat preservation plate, a reflecting film, a cyclic heating water pipe and an aluminum-wood composite floor. The reflecting film is laid on the heat preservation plate. Linear or arc-shaped heat preservation plate grooves are formed in the heat preservationplate. Linear or arc-shaped reflecting grooves are formed in the reflecting film and matched with the heat preservation plate grooves. The cyclic heating water pipe is located in the reflecting filmgrooves. The aluminum-wood composite floor is laid on the top of the reflecting film. The aluminum-wood composite floor comprises an aluminum alloy base plate, a first PUR glue layer and a solid woodplate. The first PUR glue layer and the solid wood layer are sequentially laid on the top of the aluminum alloy base plate. The solid wood plate is bonded and connected to the aluminum alloy base plate through the first PUR glue layer. The aluminum-wood water heating system is fast in heat conduction, the room temperature can be raised rapidly during a short time, the laid floor is free of cracking or deformation, the stability is good, the safety and reliability are high, and the aluminum-wood water heating system has the characteristic of being convenient to disassemble and assemble.

The invention belongs to the field of conveying belts, and particularly relates to an anti-tearing steel wire rope core conveying belt. The anti-tearing steel wire rope core conveying belt comprises acovering layer, an intermediate layer, an adhesive glue layer and a steel wire rope; the intermediate layer comprises an upper intermediate layer body and a lower intermediate layer body which are each impregnated fiber cloth; the impregnated fiber cloth is made in the manner that fiber cloth is impregnated with covering rubber pulp; and the fiber cloth is formed by warp polyester silk and weft aramid fiber silk in a woven manner. The impregnated fiber cloth is added for the anti-tearing steel wire rope core conveying belt, the transverse stretching strength of the steel wire rope core conveying belt is improved, and the tearing phenomenon of the steel wire rope core conveying belt can be effectively prevented.

The invention relates to a formula of agricultural plastic mulching films and in particular relates to an agricultural plastic polyethylene mulching film. The agricultural plastic polyethylene mulching film comprises the following raw materials in parts by weight: 86-90 parts of linear polyethylene, 10-14 parts of metallocene polyethylene, 2-3 parts of an anti-ageing master batch special for Demelon mulching films and 0.5-3 parts of an opening master batch special for Demelon mulching films, wherein the anti-ageing master batch special for Demelon mulching films comprises the following components: 86-90 parts of polyethylene, 14-20 parts of a light stabilizer 944, 3-5 parts of an antioxidant 1010, 0.5-1 part of zinc oxide and 0.5-1 part of zinc stearate; and the opening master batch special for Demelon mulching films comprises the following components: 80-90 parts of calcium carbonate/silica having the granularity of 20000 meshes, 10-15 parts of wax and 7-10 parts of polyethylene. According to the agricultural plastic polyethylene mulching film disclosed by the invention, the production cost increased because the thickness of the mulching film is increased by 20% during agricultural production can be reduced, the acceptance criteria enthusiasm of peasant households is improved, and the efficiency of DB 65 3189-2014 enforced standard implementation is improved.

The invention relates to the technical field of resin materials, in particular to a bamboo carbon fiber reinforced resin material. The bamboo carbon fiber reinforced resin material comprises the following raw materials by weight: 70-85 parts of polyvinyl chloride resin, 45-55 parts of light calcium carbonate, 10-20 parts of modified bamboo carbon fiber, 5-15 parts of bamboo fiber, 3-8 parts of a calcium-zinc stabilizer, 1-2.5 parts of an AC foaming agent, 5-13 parts of a PVC foaming regulator, 0.5-2 parts of polyethylene wax, 0.2-1.5 parts of stearic acid, 0.2-1.3 parts of an environment-friendly toughening agent, 1-2.5 parts of rutile titanium dioxide, and 2-4.5 parts of wood fiber. The bamboo carbon fiber reinforced resin material provided by the invention has excellent mechanical properties.