279results about How to "Maintain good performance" patented technology

The invention relates to a multi-hole polyester fiber DTY (draw textured yarn) and a preparation method thereof. According to the preparation method, modified polyester is spun to prepare the multi-hole polyester fiber DTY by the aid of a multi-hole spinneret plate; spinneret holes in the multi-hole spinneret plate are elliptically arrayed, namely, the hole centers of the spinneret holes are positioned on concentric ellipses, the concentric ellipses are series ellipses, long axes of the all ellipses are collinear, short axes of the all ellipses are collinear, the modified polyester is used for preparing a POY (polyester pre-oriented yarn) and then further processed to obtain the multi-hole polyester fiber DTY. A preparation method of the modified polyester includes the steps: performing reaction for terephthalic acid and ethylene glycol to prepare terephthalic acid ethylene glycol ester; adding the terephthalic acid and dihydric alcohol with branching chains, and performing reaction for mixture to prepare terephthalic acid dihydric alcohol ester; continuing to react to obtain the modified polyester. According to the method, prepared fibers are excellent in performance, the deviation ratio of linear density of the DTY is smaller than or equal to 2.0%, a breaking strength CV (variation coefficient) value is smaller than or equal to 4.0%, a breaking elongation CV value is smaller than or equal to 8.0%, and a CV value of crimping shrinkage rate is smaller than or equal to 8.0%.

The invention relates to a high-uniformity polyester industrial yarn used for a safety belt and a production method thereof. The raw material of the high-uniformity polyester industrial yarn is modified polyester composed of a terephthalic acid chain segment, a glycol chain segment and a branched chain-containing dihydric alcohol chain segment. The production method is characterized in that terephthalic acid and branched chain-containing dihydric alcohol are subjected to an esterification reaction under catalysis of concentrated sulfuric acid to obtain dihydricalcohol terephthalate; then terephthalic acid and glycol are prepared for the esterification reaction to obtain ethylene terephthalate; finally ethylene terephthalate and dihydricalcohol terephthalate are stirred and mixed, under a catalyst and a stabilizing agent, the condensation polymerization reactions under a low vacuum phase and a high vacuum phase are carried out to prepare the modified polyester, and the modified polyester is subjected to metering, extrusion by a porous spinneret, cooling, oiling, stretching, thermoforming and reeling to prepare the high-uniformity polyester industrial yarn.

The present invention refers to a separator, comprising a porous substrate having multiple pores; a porous coating layer formed on at least one area selected from at least one surface of the porous substrate and the pores of the porous substrate, and comprising multiple inorganic particles and a binder polymer, the binder polymer being existed on a part or all of the surface of the inorganic particles to connect and immobilize the inorganic particles therebetween; and microcapsules dispersed in at least one area selected from the pores of the porous substrate and pores formed by vacant spaces between the inorganic particles present in the porous coating layer, and containing therein an additive for improving the performances of an electrochemical device, and an electrochemical device having the same.

This invention relates to preparation method of a flakiness microcrystalline cellulose, as well as its surface reshaping method. The process: in water disperse medium, take reaction with sulfuric acid to gain flakiness microcrystalline cellulose, then surface by acetic acid esterification or SAA absorption modifing, repass wash, filter , dryness, gain the product. The mass ratio of water and cellulose is 3 to 25:1, sulfuric acid volumetric concentration for 30 to 80%, temperature for 10 - to 85 deg, time for 5 to 120 minutes. The mass ratio of acetic ester modifier or SAA and microcrystalline cellulose is 0.1 to 5: 100. The modifier not only keep the favorable physics and mechanical property of cellulose, but also improve dispersibility, greatly advance consistency with high molecular material, broaden the application area.

The invention relates to a high-uniformity colored polyester industrial yarn and a preparation method thereof. The raw material of the high-uniformity colored polyester industrial yarn is modified polyester composed of terephthalic acid chain segments, ethylene glycol chain segments and dihydric alcohol chain segments containing branched chains. The method for preparing the high-uniformity colored polyester industrial yarn comprises the following steps: carrying out an esterification reaction between terephthalic acid and dihydric alcohol containing branched chains under catalysis of concentrated sulfuric acid, thereby obtaining polyethylene terephthalate; matching terephthalic acid and ethylene glycol to carry out an esterification reaction, thereby obtaining ethylene glycol terephthalate; finally, stirring and mixing the two products, carrying out condensation polymerization at low vacuum stage and high vacuum stage in the absence of catalysts and stabilizers, thereby obtaining modified polyester; metering the modified polyester, adding black master batch, performing porous spinneret extrusion, cooling, oiling, stretching, heat setting, winding, thereby obtaining the high-uniformity colored polyester industrial yarn.

The invention relates to a differential-shrinkage cotton-like composite filament and preparation method thereof; the differential-shrinkage cotton-like composite filament is a composite filament blended by a modified polyester POY filament and a modified polyester FDY filament; the modified polyester consists of polyester and aminoadipic acid glycol ester; the aminoadipic acid glycol ester is dispersed among the molecular chains of the polyester; and the aminoadipic acid glycol ester takes effect of hydrogen bond among the molecular chains of the polyester, so as to stabilize the positions of the aminoadipic acid glycol ester with respect to the molecular chains of the polyester; in condition of the temperature is 90-130 degrees centigrade, the free volume spaces among the molecular chains inside the fiber of the differential-shrinkage cotton-like composite filament are increased by 20-30v/v%. The aliphatic ester increases the free volume of the polyester fiber in order to increase the diffusion degree of the dye, thereby increasing the dyeing performance of the polyester fiber. The differential-shrinkage cotton-like composite filament is applicable to clothes fabric, bedding article, decoration article, and the like.

The invention relates to a porous super-bright trilobal profiled polyester fiber and a production method thereof. Modified polyester is spun by adopting a porous spinneret with the cross section shape of spinneret micro-pores being trilobal in order to produce the porous super-bright trilobal profiled polyester fiber; the spinneret micro-pores are arranged in the porous spinneret in an elliptical manner, the pore center of every spinneret micro-pore is positioned in a concentric ellipse, concentric ellipses are serial ellipses, the long axes of all the ellipses are collinear, and the short axes of all the ellipses are collinear. A preparation method of the modified polyester comprises the following steps: reacting terephthalic acid with ethylene glycol to prepare ethylene terephthalate, adding diol terephthalate prepared from terephthalic acid and branched chain-containing diol, and continuously reacting to obtain the modified polyester. The porous super-bright trilobal profiled polyester fiber produced in the invention has excellent performances, the liner density deviation ratio is not greater than 0.5%, the breaking strength CV value is not greater than 4.0%, the fracture elongation CV value is not greater than 8.0%, and the yarn unevenness CV value is not greater than 2.0%.

The invention relates to a linen-like type differential shrinkage composite filament and a preparation method thereof. The linen-like type differential shrinkage composite filament is a composite filament prepared from modified polyester POY filaments and modified polyester FDY filaments which are subjected to fiber mixing processing; the breakage elongation of the linen-like type differential shrinkage composite filament is 40.0+/-3.0%, the network degree of the linen-like type differential shrinkage composite filament is 95+/-5 piece/m; the modified polyester consists of polyester and amino fatty acid gylcol ester; the amino fatty acid gylcol ester is dispersed among the molecular chains of the polyester and has a hydrogen bonding function with the molecular chains of the polyester, so that the relative positions of the amino fatty acid gylcol ester and the molecular chains of the polyester are fixed; under the condition that the temperature is 90-130 DEG C, the free volume space among the molecular chains of fiber of the linen-like type differential shrinkage composite filament is increased by 20-30v/v%. Due to adoption of the aliphatic ester, the free volume of the polyester fiber is increased, so that the diffusion degree of dye is increased, and the dyeing property of the polyester fiber is improved. The linen-like type differential shrinkage composite filament can be used in the industries such as high-class woof fabrics and clothes.

The invention discloses a hydrophobic ultraviolet radiation aging-resistant wood-based composite material and a preparation method thereof. The surface layer of the composite material is of a titanium dioxide layer with a micro-nano secondary structure and the crystal structure of the composite material is of a rutile type. The preparation method comprises the processes of precursor solution preparation, multistage dipping and drying: firstly dispersing a water-soluble titanium source in a 5-7mol/L sodium chloride aqueous solution to obtain a solution a, wherein the concentration of the water-soluble titanium source is guaranteed to be 0.001-0.500 mol/L; uniformly adding an alkaline matter into the solution a to obtain a precursor solution, wherein the concentration of the alkaline matter is guaranteed to be 0.001-0.500 mol/L; dipping a wooden base material into the precursor solution, reacting at a room temperature for 1-10 days, cleaning and drying for 1-2 days to obtain a wood-based composite material; dipping the wood-based composite material in 0.8-1.2% of a low-surface energy matter solution, reacting at a room temperature for 0.2-1 day and drying for 1-2 days to obtain the hydrophobic ultraviolet radiation aging-resistant wood-based composite material. According to the preparation method, a titanium dioxide surface layer with a rutile type micro-nano secondary structure can be constructed on the surface of the wooden base material so that the wood-based composite material is excellent in hydrophobicity and ultraviolet radiation aging resistance.

The invention relates to a wool-like differential shrinkage composite filament and a preparation method thereof. The wool-like differential shrinkage composite filament is a composite filament prepared from modified polyester POY filaments and modified polyester FDY filaments which are subjected to fiber mixing processing; the amino fatty acid gylcol ester is dispersed among the molecular chains of the polyester and has a hydrogen bonding function with the molecular chains of the polyester, so that the relative positions of the amino fatty acid gylcol ester and the molecular chains of the polyester are fixed; under the condition that the temperature is 90-130 DEG C, the free volume space among the molecular chains of fiber of the wool-like differential shrinkage composite filament is increased by 20-30v/v%. Due to adoption of the aliphatic ester, the free volume of the polyester fiber is increased, so that the diffusion degree of dye is increased, and the dyeing property of the polyester fiber is improved. The wool-like differential shrinkage composite filament can be used in the industries such as clothes fabrics, bedding articles and decorative articles.

The invention provides a 3D printer for integral manufacturing of a functionally graded material and a forming structure, and a working method thereof. A feeding module, a mixing module and a printingsprayer are split; and through ingenious arrangement of the components, integral manufacturing of the continuous functionally graded material and the complex three-dimension structure can be achieved. The 3D printer has the characteristics and outstanding advantages of active, efficient and uniform mixing of various materials, high print resolution (due to micro-nano microscale characteristic structure printing), diverse applicable materials, high production efficiency, low cost and simple structure; and particularly, the 3D printer can achieve integral manufacturing of the continuous functionally graded material and the complex three-dimension structure based on material composition and microstructures.

The invention belongs to the field of a phase change material technology for cool storage, and discloses an inorganic/organic composite casing layer nanometer phase-change capsule cool-storage fluid and a preparation method thereof. The preparation method comprises the following steps: hydrolysis and condensation are carried out for metal alkoxide, modification is carried out with an organosilicon coupling agent, modified metal oxide sol is obtained; a styrene monomer, an acrylic ester comonomer, a chain transferring agent, an initiator and an alkane core material are mixed for forming an oil phase, the oil phase is added into an emulsifier and deionized water for forming a water phase, homogeneous emulsification is carried out, and miniemulsion is obtained; the miniemulsion is heated to 40-80 DEG C, in situ polymerization is carried out for 10-50 minutes, the modified metal oxide sol is added drop by drop, and after a reaction, a composite casing layer nanometer phase change capsule emulsion is obtained; the emulsion is added into an antifreeze, water is added for dilution, and the product is obtained. Metal oxide and organic polymers are compounded into a casing layer; the product has the advantages of high heat conduction performance, high specific heat capacity and good mechanical stability at the same time, and the product can be used as phase-change cool-storage fluid for cool storage air-conditionings.

The invention discloses a milk protein fiber spinning yarn and manufacturing method, which is characterized by the following: making quality percentage in the mixed color spinning yarn at 5-100 percent milk protein fiber; dyeing milk protein fiber and other fibers respectively; adopting active dye for milk fiber through acid dyeing and alkaline color fixing course; reducing fiber destroying; keeping kinds of superior quality of fiber; satisfying personal pursuit for comfortable costume, health and fashion.

The invention relates to a differential shrinkage composite filament and a preparing method thereof. According to the invention, modified polyester employs a porous spinneret for spinning to prepare the differential shrinkage composite filament; an arrangement mode of the spinneret holes on the porous spinneret is in an elliptical shape, the aperture center of the spinneret holes is positioned on concentric ellipses, the concentric ellipses are a series of ellipses, the long shafts of all ellipses are collinear, and the short shafts are collinear. The differential shrinkage composite filament is subjected to plying and doubling by modified polyester POY filament and FDY filament, then is composited through network, and finally reeled. A preparation method of the modified polyester comprises the following steps: terephthalic acid and glycol are subjected to a reaction to prepare ethylene glycol terephthalate, terephthalic acid and branched chain-containing dihydric alcohol are subjected to a reaction to obtain terephthalic acid glycol ester, and continuous reacting is carried out on the material to obtain the product. The filament has excellent fiber performance, the linear density deviation ratio is less than or equal to 2.0%, a breaking tenacity CV value is less than or equal to 4.0%, a breaking elongation CV value is less than or equal to 8.0%, and a crimp contraction variation coefficient CV value is less than or equal to 8.0%.

The invention belongs to the polyester spinning field and relates to an 8-shaped hollow polyester fiber FDY (Fully Drawn Yarn) and a preparation method thereof. A spinning melt contains saturated fatty acid metal salt and modified polyester, wherein the mass ratio of saturated fatty acid metal salt to modified polyester is (0.0005-0.002) to 1; saturated fatty acid metal salt is fatty acid metal salt, the carbon atomic number is 12-22, the melting point is 100-180 DEG C, and the kinetic viscosity is less than or equal to 1Pa.s; a molecular chain of modified polyester comprises a terephthalic acid chain segment, a glycol chain segment and a rigid structure chain segment, and the molar ratio of the rigid structure chain segment to the terephthalic acid chain segment is (0.02-0.05) to 1; and the die swell ratio of the spinning melt is 1.23-1.33, and the after-filtration pressure during the spinning is 85-125kg/cm<2>. The prepared 8-shaped hollow polyester fiber FDY has relatively high degree of hollowness and relatively good shape-preserving effect.

The invention relates to porous PTT (polytrimethylene terephthalate)-fiber HOY (high oriented yarn) and a preparation method thereof. According to the preparation method, the porous PTT-fiber HOY is prepared from modified PTT by spinning with a porous spinneret; spinneret orifices in the porous spinneret are arranged in an oval shape, that is, the centers of the spinneret orifices are located on concentric ellipses adopting series ellipses, major axes of all the ellipses are collinear, and minor axes of all the ellipses are collinear. The porous PTT-fiber HOY is prepared from modified PTT through measurement, extrusion, cooling, oiling and winding. A preparation method of modified PTT comprises the steps as follows: terephthalic acid and 1,3-propanediol react, trimethylene terephthalate is prepared, diol terephthalate prepared from terephthalic acid and branched-chain-containing diol through a reaction is added, reaction is continued, and modified PTT is obtained. The prepared HOY has excellent fiber performance, the deviation rate of linear density is lower than or equal to 0.2%, the breaking strength CV value is lower than or equal to 2.5%, and the breaking elongation CV value is lower than or equal to 5.0%.

The invention relates to a high-homogeneity car model polyester industrial yarn and a preparation method thereof. The high-homogeneity car model polyester industrial yarn uses modified polyester formed by a terephthalic acid chain segment, an ethylene glycol chain segment and branched chain-containing diol as a raw material. The preparation method of the high-homogeneity car model polyester industrial yarn comprises the following steps: subjecting the terephthalic acid and the branched-chain diol to an esterification reaction under the catalysis of concentrated sulfuric acid to obtain dihydroxy alcohol terephthalic acid; subjecting the terephthalic acid and the ethylene glycol to an esterification reaction to obtain dimethyl terephthalate; finally stirring and mixing the two, subjecting a polycondensation reaction at low vacuum phase and high vacuum stage under the action of a catalyst and a stabilizer to obtain modified polyester, subjecting the modified polyester to metering, porous spinneret extruding, cooling, oiling, stretching, heat setting and winding to obtain the high-homogeneity car model polyester industrial yarn.

The invention relates to a porous soft polyester fiber FDY yarn and a preparing method thereof. According to the invention, modified polyester employs a porous spinneret for spinning to prepare the porous soft polyester fiber FDY yarn; an arrangement mode of the spinneret holes on the porous spinneret is in an elliptical shape, the aperture center of the spinneret holes is positioned on concentric ellipses, the concentric ellipses are a series of ellipses, the long shafts of all ellipses are collinear, and the short shafts are collinear. the porous soft polyester fiber FDY yarn is prepared by metering modified polyester slices, extruding, cooling, oiling, stretching, thermoforming and reeling the material. A preparation method of the modified polyester comprises the following steps: terephthalic acid and glycol are subjected to a reaction to prepare ethylene glycol terephthalate, terephthalic acid and branched chain-containing hexanediol are subjected to a reaction to obtain the terephthalic acid glycol ester, and continuous reacting is carried out on the material to obtain the product. The yarn has excellent fiber performance, the linear density deviation ratio is less than or equal to 0.5%, the breaking tenacity CV value is less than or equal to 4.0%, breaking elongation CV value is less than or equal to 8.0%, and a yarn unevenness CV value is less than or equal to 2.0.

The invention relates to porous super-bright polyester fiber and a preparation method of the porous super-bright polyester fiber. According to the porous super-bright polyester fiber, melt spinning, multi-pore forming, section heteromorphosis and the like are conducted to make the polyester fiber have the super-bright flickering effect, and the material is modified polyester; a linear spinneret plate is adopted in the melt spinning process; the modified polyester is composed of polyester and amidogen fatty acid glycol ester, the amidogen fatty acid glycol ester is dispersed among the molecular chains of the polyester, and the free volume space of the porous super-bright polyester fiber polyester among the molecular chains inside the fiber is increased by 20 v/v% to 30 v/v% under the condition that the temperature ranges from 90 DEG C to 130 DEG C; the porous super-bright polyester fiber can be used for silk-like fabric, wool-like fabric, corduroy, other pile fabric, woolen yarn, decorative fabric and the like.

The invention discloses a high-performance PC (Polycarbonate)/ABS (Polyacrylonitrile) alloy prepared by waste electrical PC/ABS material and a preparation method and an application of high-performance PC (Polycarbonate)/ABS (Polyacrylonitrile) alloy. The PC/ABS alloy comprises the following material components by weight: 95-97 parts of waste electrical PC/ABS crushed materials, 0.2-0.4 part of B-215 long-acting heat stabilizer, 2-4 parts of SBS (sodiumbisulfite) flexibilizer, 1-2 parts of EMA flexibilizer and 0.3-0.5 part of anti-ultraviolet agent. The PC/ABS alloy provided by the invention has the characteristics of high performance, high flame retardance, high impact resistance, high coldness resistance, high stability and static electricity resistance and the like, can be used for manufacturing an intelligent electric meter housing, a meter housing, a fax machine housing or a copier housing and the like.

The invention discloses polycarbonate/glass fiber alloy used for the cold resistant housing of an intelligent water meter and a preparation method thereof. The polycarbonate/glass fiber alloy comprises, by weight, 30 to 50 parts of PC, 30 to 50 parts of an PC recycled material, 0.3 to 0.5 part of a fireproof agent FR2025, 0.5 part to 2 parts of titanium dioxide, 9.5 to 11.5 part of glass fiber, 2 to 5 parts of EMA, 0.1 to 0.5 part of an anti-oxidant1010, 0.1 to 0.5 part of an anti-oxidant 168, 0.3 to 0.5 part of an ultraviolet resistant agent UV-531, 0.03 to 0.08 part of diffusion powder EBS, 0.04 to 0.08 part of ultramarine blue powder, 0.02 to 0.04 part of iron oxide red powder 0.005 to 0.01 part of high temperature resistant florescent yellow powder and 2 to 5 parts of a cold resisting agent 2602. The alloy has the characteristics of high performance, high cold resistance, high fire retardancy, high impact, high stability, resistance to static electricity and the like, and can be used for preparing the housing of intelligent water meters used in chilly regions and for preparing terminal rows.

The invention relates to a tension roller used in a cold rolling production line, in particular to a tension roller with a mid-frequency quenching hard surface, and a manufacturing method thereof. The tension roller comprises a roller and round side covers which are fixedly and closely covered at the openings of the two ends of the roller, and the circle centers of the two side covers are in coupling connection with a left axle head and a right axle head respectively. The tension roller is characterized in that: the outer surface of the roller is covered with a spaying layer, the outsides of the two side covers are provided with concave grooves in a surrounding way, the concave groove is internally provided with a through hole communicated with the interior of the roller; the spaying layer adopts the functional metal ceramic coating which is composed of compound metal ceramics of WC/Co metal ceramics and metal or alloy. The tension roller mainly solves the technical problems that the existing product roller surface is sprayed with hard chromium plating on the outer surface and is easy to be pressed into concave pits or protuberances by sundries such as ferric oxide, etc. When in use, drawing stamps or stains are formed on the surface of the finished product, the band steel, thus influencing the surface quality of the band steel, and the tension roller is beneficial to radiating the interior of the roller when in use.

The invention relates to a method for inhibiting expansion of a lithium ion polymer battery. The method comprises the following steps: (1) respectively rolling positive and negative plates in thermal state at the temperature of 50-150 DEG C, wherein a diaphragm is a polyolefin micropore one with thickness of 9-40mm and porosity of 25-50%; (2) winding the positive and negative plates and the diaphragm into a battery cell conventionally, and packaging the battery cell in an aluminium-plastic packaging film; (3) preparing non-water electrolyte containing lithium salt and a film-forming additive through uniform mixing, wherein the lithium salt contained in the non-water electrolyte is one of or a mixture of any two of LiPF6, LiBF4, LiBOB, LiN(CF3SO2)2 or LiN(C2F5SO2)2 and has concentration of 0.4-1.2mol/L; and the film-forming additive in the non-water electrolyte is vinylene carbonate (VC), propylene sulphite (PS) or any mixture of the VC and the PS and accounts for 0.5-4% by weight of the solvent; and (4) injecting the non-water electrolyte into the aluminium-plastic packaging film, and sealing the packaging film. The invention has the beneficial effect of effectively preventing the battery from bulging deformation under high temperature.

The invention discloses a cutting seedling method for grape. The method comprises the following steps: (1) selecting an annual plant which is 0.8-1.0 centimeter in width for serving as a cutting; (2) storing at a low temperature; (3) soaking the lower end of the cutting into clear water for 20-25 hours, and soaking in a growth regulating agent for 5-8 hours; (4) inserting the cutting on which calluses occur into a hole, and irrigating for 4-5 times; (5) after cottage, spraying a bactericide, erecting a rod after a new seedling grows to 25 centimeters, pulling a rope, tying the new seedling and pinching. The cutting seedling method for the grape disclosed by the invention is simple in steps, convenient to operate and low in cost, has the characteristics of short cultivation period, quick growth of nursery stocks and high survival rate while excellent performance of grape stock plants are effectively ensured, and has important practice and popularization significances.