3942results about "Heating/cooling textile fabrics" patented technology

The invention relates to the technical field of ceramic materials, in particular to a wear-resistant woven ceramic material and a preparation method thereof, and the preparation method comprises the following steps: preparation of a ceramic body: weighing the following raw materials in parts by weight: 15-20 parts of boron nitride, 5-8 parts of aluminum oxide, 4-7 parts of an additive doped with modified nano titanium dioxide, 2-5 parts of tungsten carbide, 2-4 parts of zirconium oxide and 8-12 parts of ball-milling leveling liquid; according to the wear-resistant woven ceramic material disclosed by the invention, the carbon fibers and the basalt fibers are respectively immersed into the ceramic body for immersion treatment, then orthogonal weaving is performed, and finally sintering improvement is performed to obtain the woven ceramic material, so that the wear resistance, toughness and pollution resistance of the obtained woven ceramic material are improved in a balanced manner, and the product is excellent in ultraviolet resistance and thermal cycling resistance stability.

The invention relates to the technical field of textiles. The invention discloses a textile dyeing uniformity detection system, a detection method and a dyeing method. The device comprises a light source supply device which is arranged above a textile and is used for providing light sources with two wavelengths and generating monochromatic coherent light, a dielectric layer supply device for forming a uniform dielectric layer, a reflective light path device for splitting beams and guiding the beams to form an interference area, and an image acquisition device for acquiring interference fringe images, the angle adjusting device is used for adjusting irradiation and acquisition angles; and the image processing device is used for analyzing signals and identifying non-uniform dyeing areas and flaws. A high-precision detection system is constructed, the light source and the dielectric layer cooperate to realize micron-sized defect recognition, the visibility of interference fringes is improved to 0.8 or above, and the dynamic tension frame guarantees the precision. The reflective light path and angle adjusting device adapts to a complex environment, a detection method and a dyeing method are cooperated, and through pretreatment, quantitative analysis and multi-dimensional verification, the misjudgment rate is greatly reduced, and the detection speed adapts to production.

The invention provides a high-strength, light and supercritical foaming fabric and a preparation method thereof, complete fibers used by the fabric comprise core layer fibers and a skin layer material, the outer side of the core layer fibers is uniformly coated with the skin layer material, and the skin layer material can be foamed; the core layer fiber is at least one of aramid fiber, polyarylate fiber, polyimide fiber, ultra-high molecular weight polyethylene fiber, polyester fiber and polyamide fiber; and the skin layer is made of thermoplastic elastomer resin. The preparation method comprises the following steps: uniformly coating the outer side of the core layer fiber with the skin layer material, and then carrying out supercritical foaming on the skin layer material. According to the invention, the contradictory technical requirements of the fabric for shoes on strength, light weight, comfort and the like are solved in a simple mode; the body strength of the fiber for the shoes can be kept, and the characteristics of light weight and air permeability of the foaming fabric are also achieved; the difficulty of direct foaming of the fabric / fiber for shoes is reduced, and the vamp fabric and the shoe article which are uniform in foaming, breathable, light in weight, high in strength and soft can be obtained.

The invention relates to the technical field of tentering setting machines, in particular to a tentering setting machine filtering conduction band dust removal device which comprises a dust removal shell, the side wall of the dust removal shell is communicated with a hollow pipe, a filtering net cylinder is arranged in the dust removal shell, and rotating rings are fixed to the two ends of the filtering net cylinder. Limiting rings which are symmetrically distributed are fixed to the inner wall of the dust removal shell, scraping plates which are symmetrically distributed are fixed between the limiting rings, a partition plate is arranged on the inner wall of the filter screen cylinder, a rotating rod penetrates through the end face of the dust removal shell, and the rotating rod is connected with a driving mechanism, a transmission mechanism and a reverse blowing mechanism; when there are many impurities such as dust and thread ends on the surface of the filter screen cylinder, the filter screen cylinder is driven to rotate through the rotating ring, the filter screen cylinder in the rotating process is cleaned through the scraping plate, meanwhile, back flushing is conducted on the filter screen cylinder from the interior of the filter screen cylinder, and the impurities such as dust and thread ends adsorbed in meshes can be effectively blown off; and the cleaning effect on the filter screen cylinder is effectively improved.

The invention relates to a fluoride-free polyimide-based film and a preparation method thereof. The method comprises the following steps: S1, preparing a polyamide acid solution; s2, fluorine-free organic silicon serving as a modifier is added into the polyamide acid solution and dispersed, a blended spinning solution is formed, and the solubility parameter difference value of the fluorine-free organic silicon and polyamide acid is 2.0 (MPa) 1 / 2 or below; s3, carrying out electrostatic spinning on the blended spinning solution to form a polyamide acid-based nanofiber layer; and S4, carrying out thermal imidization on the polyamide acid-based nanofiber layer to obtain the fluoride-free polyimide-based film. The film has a structure formed by three-dimensional cross-linking and winding of polyimide-based nanofibers, and the polyimide-based nanofibers are composed of a polyimide base material and fluorine-free organic silicon dispersed in the polyimide base material. The method does not involve fluorine-containing raw materials, and is environment-friendly and high in process compatibility. The film provided by the invention has excellent waterproofness, air permeability and mechanical properties at the same time.

A method for manufacturing a brief for a male wearer includes using a stretchable fabric defining a first leg portion, a second leg portion, and a crotch portion. The method includes placing the stretchable fabric into a die assembly such that the crotch portion sits between a core and a cavity. The method includes mating the core with the cavity to cause the core to push a section of the crotch portion into the cavity such that the section is stretched to a stretched state. The section includes a synthetic compound. The method includes applying heat and pressure at the section to cause a volume of the synthetic compound to melt. Further, the method includes cooling the section such that a melted volume of the synthetic compound is infused or incorporated into a remainder of the section and solidified therewithin.

The invention belongs to the technical field of carbon material fibers, and discloses a preparation method of a carbon nanofiber reinforced carbon material fiber fabric, which comprises the following steps: fixing a weakly twisted carbon material fiber tow on an electrostatic spinning nano yarn machine; forming a carbon nanofiber membrane by utilizing electrostatic spinning, uniformly wrapping the carbon nanofiber membrane on a carbon material fiber bundle subjected to weak twisting, then rolling into a shaft, then weaving the rolled fibers into a fabric, and sequentially performing hot pressing and carbonization treatment on the fabric to prepare a carbon nanofiber reinforced carbon material fiber fabric; the weak twisting means that the twisting degree is 5-13 twists per meter. According to the invention, the carbon nanofiber is coated on the carbon material fiber, so that the interface bonding strength between the nanofiber and the carbon material fiber is improved, and then the fabric prepared from the carbon nanofiber is subjected to hot pressing and carbonization treatment, so that the mechanical property, the electrical conductivity and the heat-conducting property of the fabric are further improved; therefore, the composite material has a huge application prospect in the fields of high-performance composite materials, intelligent textiles and the like.

The present invention discloses a method for preparing a flexible polyaniline / biomass carbon electromagnetic shielding material. After high-temperature carbonization of a fiber fabric, a structurally ordered biomass carbon matrix is ​​obtained. Under the synergistic action of an oxidant and a dopant, aniline monomer is in situ oxidatively polymerized to generate polyaniline that is adsorbed on the surface of the biomass carbon matrix, thereby obtaining the polyaniline / biomass carbon electromagnetic shielding material. The electromagnetic shielding material of the present invention has an intricate and ordered two-dimensional network structure, which helps to establish a conductive network and exhibits excellent electromagnetic shielding effectiveness. In addition, the unique flexibility can fully meet the special requirements of flexible wearable electronic devices, electromagnetic shielding clothing fillers, etc. for the performance of electromagnetic shielding materials. The synthesis process of this method is safe and environmentally friendly, and the required consumables are cheap and abundant, making it suitable for commercialization and industrialization requirements.

The invention relates to the technical field of knitted fabrics, in particular to a high-strength wear-resistant anti-snagging functional dry knitted fabric for exercise training and a production process thereof, and the production process comprises the following steps: weighing the following raw materials in parts by weight: 30-40 parts of polyester fibers, 20-30 parts of aramid fibers, 5-10 parts of jade fibers and 5-10 parts of polyamide fibers; polyester fibers, aramid fibers, jade fibers and polyamide fibers are subjected to relaxation treatment and then subjected to a drawing procedure, and the mixed roving is obtained. According to the knitted fabric for exercise training, polyester fibers, aramid fibers, jade fibers and polyamide fibers are blended and blended to prepare mixed roving, meanwhile, the mixed roving is infiltrated and improved through infiltrating liquid, finally, the mixed roving is matched with modified polyester filaments to be subjected to circular knitting improvement, and the obtained knitted fabric has the advantages of being excellent in wear resistance, mechanical strength performance and snagging performance, good in elasticity and good in elasticity. And the knitted fabric has remarkable moisture absorption, dryness and dryness and washing resistance, and the comprehensive coordination of the product is excellent.

The invention relates to the technical field of laser cutting, in particular to a fabric laser cutting device for preparing an integrated seamless dress and a preparation method.The fabric laser cutting device comprises a fabric cutting device body, a rail frame is slidably connected to the fabric cutting device body, and a supporting frame is slidably connected to the rail frame; the outer wall of the bottom of the supporting frame is fixedly connected with a mounting plate. Through synchronous movement of the pressing roller and the laser cutting head, the situation that in the laser cutting process, due to the fact that the pressing assembly cannot move synchronously along with the track of the laser cutting head, fabric in a laser cutting area slightly moves due to cutting force or machine vibration factors, and the cutting accuracy and edge quality are affected is avoided; correspondingly, when the pressing roller and the laser cutting head synchronously move, the fabric can be stably pressed along with the track of the laser cutting head in real time, the stable pressing effect can effectively prevent the fabric from slightly moving due to factors such as cutting force or machine vibration in the cutting process, and therefore the cutting accuracy is improved.

The invention relates to the technical field of fabrics, in particular to a moisture absorption and sweat releasing fabric and a preparation process thereof.The preparation process includes the following steps that raw materials including, by weight, 35-40 parts of modified polyester silk, 20-25 parts of functional yarn and 8-12 parts of polyester fiber are weighed; a preparation method of the modified polyester yarn comprises the following steps: melting, blending and extruding polyester resin and a modifier according to a weight ratio of 100: 5; weaving the modified polyester yarns, the functional yarns and the polyester fibers into a knitted fabric body by using a circular knitting machine; setting the knitted fabric body at a high temperature of 115 DEG C for 50 seconds, and obtaining the moisture-absorbing and sweat-releasing fabric after setting is finished. According to the moisture absorption and sweat releasing fabric, the modified polyester yarn, the functional yarn and the polyester fiber are woven into the knitted fabric through the circular knitting machine, the modified polyester yarn is improved and optimized by matching polyester resin with the modifier, and the moisture absorption and sweat releasing performance, the elasticity and the wear resistance of the polyester yarn are enhanced through mutual matching and mutual assistance of the raw materials.

The invention particularly relates to a red phosphorus-loaded carbon fiber material and application thereof in preparation of a potassium ion battery. The method comprises the following steps: dissolving polyacrylonitrile, ferric acetylacetonate and ZIF-8 in N, N-dimethylformamide to prepare a shell solution; dissolving potassium hydroxide in dimethyl sulfoxide to obtain a core solution; spinning the shell solution and the core solution into a nano composite fiber membrane through coaxial electrostatic spinning; carrying out pre-oxidation and carbonization treatment on the nano composite fiber membrane to obtain a uniform porous carbon nano fiber membrane loaded with iron metal clusters under proper atmosphere and temperature; and introducing red phosphorus into pores of the carbon nanofiber membrane by using an evaporation-condensation method to obtain the red phosphorus negative electrode material loaded with the iron metal cluster. The red phosphorus is nanocrystallized and embedded into the porous carbon fiber matrix, so that the problem of volume change of the red phosphorus is effectively solved; and meanwhile, the activation process is simplified by utilizing a coaxial electrostatic spinning technology, and the potassium storage electrochemical performance of the red phosphorus negative electrode is remarkably improved by introducing metal clusters.

The invention discloses an injectable material for promoting bone regeneration through piezoelectric and conductive integrated nanofiber hydrogel with ultrasonic response and a preparation method of the injectable material. The injectable material is composed of piezoelectric and conductive nanofibers and hydrogel. Wherein the piezoelectric conductive nanofiber is prepared from an inorganic piezoelectric material and a piezoelectric polymer through electrostatic spinning, or is prepared from an inorganic / organic composite piezoelectric material and a biological material with conductive performance through electrostatic spinning.

The invention provides a preparation process and preparation equipment for a viscose-based short fiber solid felt with a gradient pore structure, and relates to the technical field of solid felt preparation, and the preparation process comprises the following steps: carrying out pre-needling reinforcement treatment on a carded fiber web, and carrying out pre-needling reinforcement treatment on the carded fiber web through a pre-needling machine in a needling unit, with the needling frequency of the pre-needling machine being 500-800 times / min. The viscose-based short fiber solid felt with the gradient pore structure is prepared by selecting viscose-based short fibers with different linear densities and lengths, reasonably mixing and proportioning and combining a gradient needling treatment process, the preparation process is simple and easy to implement, the pore gradient distribution of the solid felt can be accurately regulated and controlled, the special requirements of different fields on the pore structure of the material are met, and the application prospect is wide. The problems that the pore structure of the viscose-based short fiber solid felt prepared by the traditional process is usually relatively single and uniform and is difficult to meet the strict requirements of some special application scenes on gradient change of the pore structure of the material are solved.

The invention relates to the technical field of knitted fabrics, in particular to an efficient moisture absorption and sweat releasing knitted fabric and a preparation method thereof.The preparation method comprises the following steps that raw materials are weighed by weight, 15-25 parts of cotton fibers, 30-40 parts of modal fibers and 30-35 parts of Coolmax fibers are weighed, blended yarn is woven in a 30-inch 30-needle mode, and woven fabric is obtained. According to the knitted fabric, cotton fibers and modal fibers are matched with Coolmax fibers to be subjected to high-temperature blank fixing and blending treatment, then finishing modification liquid ultrasonic high-pressure immersion treatment is matched, and the raw materials are blended, optimized and improved, so that the moisture absorption and sweat releasing properties, the antistatic property and the pollution resistance of the prepared knitted fabric achieve performance balance coordination; meanwhile, the product has remarkable weather-proof and washing-resistant stability effects.

The invention discloses a preparation method of composite geotechnical cloth, belongs to the technical field of geotechnical material processing, and solves the problems of insufficient interlayer bonding strength, poor permeation stability and incapability of adapting to regional differentiation mechanical requirements in the traditional process. According to the method, two layers of synthetic fiber geotextile and a layer of polymer geomembrane are selected, and a gradient needling machine is adopted to implement a double-station gradient needling process, specifically, thick needle needling pre-reinforcement is synchronously conducted on the upper side and the lower side till the membrane thickness is 50-60% of the depth, then fine needle needling finishing is conducted till the membrane thickness is 70-80% of the depth, the needling density is preset to be 20-70 needles / cm according to different stress areas of a membrane material, and the needling density is 20-70 needles / cm according to different stress areas of the membrane material; in the process, data of needling depth, needling density and membrane material tension are collected in real time through a dynamic monitoring system, parameters are automatically adjusted, and finally a stable structure is formed through heat setting treatment at 120-140 DEG C for 8-12 minutes. The composite geotextile prepared by the method has a high-strength bonding interface and excellent anti-seepage performance, and is suitable for the engineering fields of water conservancy project anti-seepage, road base reinforcement, refuse landfill isolation and the like.

The application relates to a continuous macro-preparation device and method of a soft and elastic ceramic superfine fiber material, which sequentially comprises a feeding and liquid preparation system, a multi-jet uniform electrostatic spinning system, a low-temperature calcination system and a winding system. Raw materials are mixed, low-temperature dispersed and vacuum concentrated to obtain a sol; the sol and a polymer flow into a polymer mixing device to be mixed and bubble removed; the mixed sol flows into an inorganic component content control device to be pumped by negative pressure to obtain a spinning solution; the spinning solution flows into a multi-jet electrostatic spinning module to adjust and control the temperature, humidity and multi-directional differential speed during spinning to obtain a fiber membrane material or a fiber flake material; the fiber material is sequentially transmitted to a drying area, a microwave pretreatment area, a polymer removal area, an oxygen-poor atmosphere heat treatment area and a cooling area to be calcined in multiple temperature zones to obtain the soft and elastic ceramic superfine fiber material; and winding and packaging are realized to realize the continuous macro-manufacture of the soft and elastic ceramic superfine fiber material.

The invention relates to the technical field of spunbond non-woven fabric manufacturing, in particular to a low-cost recyclable spunbond non-woven fabric manufacturing method capable of replacing traditional kraft paper, and the method comprises the steps of raw material preparation, melt extrusion, spinning web forming, hot-press shaping, cooling and trimming, post-processing, coiling and forming and the like. Raw materials comprise polypropylene particles, degradable master batches and recycled spunbond non-woven fabric fragments, the recycled fragments are subjected to surface modification treatment, and the degradable master batches contain polylactic acid, a starch-based degradation agent and other components. The non-woven fabric is quantified to 80-120 g / m < 2 > by optimizing processes such as a barrier type screw, infrared preheating and laser trimming and cooperating with water-repellent and antistatic post-treatment, the mechanical properties such as tensile strength, tearing strength and folding resistance are superior to those of traditional kraft paper, the non-woven fabric can be recycled for at least three times, and the degradation period is controllable; the method realizes closed-loop utilization of raw materials, reduces cost and energy consumption, expands application in the fields of packaging, agriculture and the like, and has remarkable economic and environmental benefits.

The invention discloses special cloth for a single-sided terry bath foaming towel and a weaving method of the special cloth. The terry cloth comprises a three-layer structure integrally woven by a warp knitting machine, wherein the three-layer structure comprises a base layer and 100D / 36F polyester filament yarn warp knitting chain weave; the binding layer is a 100D / 96F polyester filament chain stitch and penetrates through the substrate layer; the looped pile layer is of a vertical looped pile structure formed by 300D / 10F polyester filaments, the height of looped piles is 7-8 mm, and the density of the looped piles is 25-30 / cm; the thickness ratio of the base layer to the binding layer to the looped pile layer of the three-layer structure is 0.6: 1: 7. The three kinds of yarns with different thicknesses are combined to form a three-layer structure, the three-layer structure is directly formed through warp knitting, a traditional fuzzing roller is not needed for fuzzing, the upright performance of a looped pile is guaranteed, it is guaranteed that the looped pile does not generate monofilament breakage and is stable in structure, and the foaming performance and the weaving feasibility are balanced.

The invention relates to the field of mechanical engineering, and discloses a tentering setting production speed intelligent adjusting method and system, and the method comprises the steps: analyzing the thermal sensitivity, melting point, elastic coefficient and elastic modulus of a to-be-tentered textile; a heat setting curve of the to-be-tentered textile is constructed, the optimal setting temperature of the to-be-tentered textile is determined, and a heat setting control mechanism of the tentering setting machine is constructed; the stretching tension and the tentering tension of the to-be-tentered textile are calculated, the distance between spreading rollers and the speed of the spreading rollers of the tentering setting machine are analyzed, the cooling efficiency of the tentered textile is calculated, and a cooling control mechanism of the tentering setting machine is constructed; constructing a double-air-duct frequency conversion control module of the tentering setting machine; the tentering parameters of the tentering technological process are analyzed, the tentering state of the to-be-tentered textile in the tentering technological process is analyzed, the production speed parameters of the tentering setting machine are determined, and the production speed of the tentering setting machine is executed for intelligent adjustment. According to the invention, the production efficiency of tentering and shaping can be improved.

The invention relates to a finishing and dyeing method for a one-way moisture-conducting knitted fabric. The finishing and dyeing method comprises the following procedures of presetting, pretreatment, aftertreatment, first setting and second setting. Different from the prior art, the finishing method of the one-way moisture-conducting knitted fabric provided by the technical scheme adopts twice setting procedures; in the first setting procedure, the setting temperature is controlled to be 150-160 DEG C, so that tetrafluoroethylene on the surfaces of the load effect yarns forms fluff similar to lotus leaf needle shapes, and the bottom layer water resistance is achieved; in the second setting process, the absorption and discharge functions of the moisture-absorption and sweat-discharge yarns are enhanced by adding a moisture-absorption and quick-drying auxiliary agent, and meanwhile, the water resistance of the bottom layer is not influenced.

The present application relates to a kind of weft-knitted free cutting knitted fabric and its manufacturing method, the fabric includes air layer jacquard structure, the air layer jacquard structure includes three layers of bottom layer, intermediate layer and surface layer, the bottom layer is below the intermediate layer, the surface layer is above the intermediate layer, the bottom layer is interwoven using nylon yarn and ordinary spandex, the intermediate layer is connected using ordinary spandex, and extend to the surface layer, the surface layer is interwoven using nylon yarn and ordinary spandex.The present application can realize the effect that both economic and not easy to scatter, burr, edge curl of loop structure.

The invention relates to the technical field of textiles, and discloses a mink cashmere imitation fabric and a preparation method thereof. The method comprises the following steps: (1) material selection: selecting 75D / 48F FDY semi-dull polyester as a raw material for GB1 and GB5, selecting 75D / 144F DTY semi-dull polyester as a raw material for GB2 and GB4, and selecting 68D / 72F FDY super-dull polyester as a raw material for GB3; (2) weaving: weaving the raw materials in the step (1) to obtain blank cloth with a three-layer structure; (3) slitting: slitting the blank cloth from the middle by a slitting machine to obtain a white blank with single-sided plush; and (4) after-finishing: sequentially carrying out the following operations on the white body: high-temperature setting, pre-lustring, hot blowing, carding and lustring to obtain the mink cashmere imitating fabric. The finished product imitation mink velvet fabric prepared by the method provided by the invention is fluffy, soft, fine, smooth, flat and firm in hair surface, and superior in quality.

The invention provides an anti-static knitted fabric based on charge gathering and directional guiding, a preparation method of the anti-static knitted fabric and a knitted fabric, and belongs to the technical field of knitted clothes. A first spinning component and a second spinning component are co-extruded through melt spinning to prepare composite fibers with a parallel composite structure, and the composite fibers are subjected to thermal mechanical treatment to obtain the composite yarn; the composite yarn is directionally introduced into a specific area of the fabric in a tuck-float stitch mode through an embedded weaving technology, and latent curl is activated through after-treatment. The moisture absorption expansion of the second spinning component is utilized to drive the composite yarn to macroscopically self-crimp, and the conductive filler inside is physically extruded to construct an efficient conductive skeleton, so that the humidity response adjustment and charge directional dispersion of the anti-static performance are realized, and the problems of fixed conductive state, local static accumulation and poor comfort of the existing fabric are effectively solved; and the safety and wearing experience of the clothes are improved.

The invention relates to a polyester flash non-woven fabric and a preparation method thereof, and belongs to the technical field of non-woven fabrics. The preparation method comprises the following steps: adding polyester particles, polyethylene particles, zinc oxide, a compatilizer and an antioxidant into an extruder, extruding to obtain modified particles, and grinding the modified particles to obtain superfine powder; adding the superfine powder and a solvent into a high-pressure kettle, and stirring and dissolving under heating and pressurizing conditions to form a uniform polyester solution; cooling the uniform polyester solution to a spinning temperature, and introducing supercritical carbon dioxide gas to form a uniform flash spinning solution; spinning pressure is controlled for spinning, a mesh is obtained through electrostatic filament splitting and lapping and hot air treatment of a residual solvent, the mesh is subjected to three-stage infrared preheating, and finally, the polyester flash non-woven fabric is obtained through hot pressing. The strength of the obtained non-woven fabric is superior to that of traditional polyethylene non-woven fabric, and the obtained non-woven fabric is good in breathability, good in antibacterial performance and excellent in comprehensive

The invention relates to the technical field of knitted fabrics, in particular to an anti-pilling knitted fabric and a preparation method thereof.The preparation method includes the steps that first blended yarn and second blended yarn are soaked in sufficient treating fluid to be subjected to ultrasonic soaking treatment, and after soaking is finished, suction filtration and drying are conducted to obtain modified first blended yarn and modified second blended yarn; according to the anti-pilling knitted fabric, the modal fibers are matched with the polyester fibers to obtain the first blended yarn through the cotton carding process, the spandex fibers and the bamboo fibers are matched to obtain the second blended yarn, ultrasonic immersion treatment is conducted through the treating fluid, then knitting treatment is conducted, and the knitted fabric is obtained. According to the treatment liquid, bisphenol A type epoxy resin, organic silicon hydrophobic resin are matched with melamine, a silane coupling agent, a curing agent and polyethylene glycol to be blended and matched, a nepheline syenite-doped assistant and a modified stabilizing aid are added for synergistic interaction, and the easy-cleaning performance and the anti-pilling performance of the product are improved in a coordinated mode.

The invention discloses a high-ultraviolet-resistance heat-shielding cool weft knitting fabric with a single-layer effect and a production method of the high-ultraviolet-resistance heat-shielding cool weft knitting fabric. The fabric is formed by interweaving 50D / 34F fine-denier light-net dyed yarn polyamide DTY filaments, 30D / 36F fine-denier light-net cation modified polyester DTY filaments and 20D polyurethane filaments. The yarn weight ratio of the 50D / 34F fine-denier light-mesh dyed yarn polyamide DTY filaments to the 30D / 36F fine-denier light-mesh cation modified polyester DTY filaments to the 20D polyurethane filaments is (80%-82%): (3%-5%): (15%-17%); the fabric comprises a front and back coil fabric layer which is provided with a front side and a back side and is provided with transverse white stripes, dark grey plain weaves and dark grey lattices; the front and back coil fabric layers with the transverse white stripes are formed by weaving 30D / 36F fine-denier light-mesh cation modified polyester DTY filaments and 20D polyurethane filaments, and the front and back coil fabric layers with the dark grey plain and dark grey latticed shapes are formed by weaving 50D / 34F fine-denier light-mesh dyed yarn polyamide DTY filaments and 20D polyurethane filaments; the fabric not only has a special single-sided and single-layer appearance pattern effect and a high ultraviolet-resistant heat-shielding function, but also has a skin-ice and cool-feeling function.

The invention relates to the field of preparation of diaphragms for hydrogen production through alkaline water electrolysis, and discloses a preparation method of a polyphenylene sulfide filament fiber diaphragm for hydrogen production through an alkaline water electrolysis tank. The preparation method comprises the following steps: melting polyphenylene sulfide resin to prepare filament fibers, carrying out yarn steaming, plying and plied yarn steaming on the filament fibers, weaving the filament fibers into plain weave diaphragm base cloth, and carrying out sulfonation, hot rolling shaping and other processes to prepare the polyphenylene sulfide filament fiber diaphragm. The polyphenylene sulfide filament fiber used in the invention can provide high mechanical strength for the diaphragm, and can optimize the pore structure and aperture of the diaphragm; the hydrophilic performance of the diaphragm can be remarkably improved through sulfonation treatment, so that the surface resistance and the electrolysis energy consumption of the diaphragm are reduced; the hot rolling shaping treatment can improve the air tightness of the diaphragm and reduce the thickness of the diaphragm. Therefore, the prepared diaphragm is high in mechanical strength, free of hairiness, high in porosity, uniform in pore diameter, good in hydrophilicity, low in surface resistance, high in air tightness and good in hot alkali durability, and the preparation method is simple and good in economical efficiency.

The invention provides a three-dimensional crimped yarn and a preparation method thereof. The three-dimensional crimped yarn is formed by alternately and continuously arranging knitting front coil groups and knitting back coil groups, three-dimensional crimped forms with different buckling directions are formed, each knitting front coil group comprises one or more knitting front coils which are continuously arranged, and each knitting back coil group comprises one or more knitting back coils which are continuously arranged. And the knitted reverse side coil group comprises one or more knitted reverse side coils which are continuously arranged. The three-dimensional crimped yarn is formed by alternately arranging the knitting front coil sets and the knitting back coil sets, three-dimensional crimped forms with different buckling directions are formed, the three-dimensional crimped yarn is full in hand feeling, good in bulkiness and high in elasticity, and the crimped forms of the three-dimensional crimped yarn can improve cohesive force during fiber processing and size stability of fabric.