656 results about "Heat setting" patented technology

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

The invention discloses a high-strength wear-resistant yarn and a manufacturing method thereof, and belongs to the field of spinning, the manufacturing process sequentially comprises the steps of opening, carding, drawing, roving and spinning, the raw materials used for opening comprise 70 wt% of aramid fiber and 30 wt% of cotton; in the spinning procedure, single yarns are twisted firstly, then two single yarns are plied to obtain plied yarns, the twist degree of the single yarns is 900-950 twists / m, the two single yarns have the same twist direction, and the single yarns and the plied yarns have opposite twist directions; and carrying out heat setting treatment on the plied yarn to obtain the high-strength wear-resistant yarn. Aramid fibers and cotton fibers in a specific proportion are selected as spinning raw materials, single yarns with specific twist are made and then reversely twisted to form plied yarns, finally, internal stress of the yarns is eliminated through heat setting treatment, the twist is stabilized, creep deformation in use is reduced, and the prepared yarns can be used in the industrial field, daily supplies, outdoor equipment and other products needing high wear resistance and have wide application prospects. The fabric is comfortable and soft, and the durability is improved.

The invention relates to the technical field of shoemaking equipment, in particular to a cold and hot setting machine for shoe processing and a setting technology.The cold and hot setting machine for shoe processing comprises a machine body, a hot mold assembly, a shoe mold assembly and a cold mold assembly, the hot mold assembly is arranged on one side of the machine body and used for conducting heat setting on toe cap fabric, and the cold mold assembly is arranged on the other side of the machine body; the shoe mold assembly and the cold mold assembly are both arranged on the machine body, the cold mold assembly is opposite to the shoe mold assembly in the vertical direction, and the cold mold assembly is used for conducting cold setting on the shoe head fabric obtained after heat setting. The middle flexible pressing pads are arranged, materials at the thick positions of the turnup parts are promoted to be dispersed to all positions of one circle of the turnup parts through intermittent rotation of the two middle flexible pressing pads, so that the thickness consistency of all positions of one circle of the toe cap fabric is improved, and in the subsequent cooling and shaping process of the toe cap fabric, the thickness uniformity of the toe cap fabric is improved. The cooling speeds of all parts of the toe cap fabric in one circle are basically consistent, so that the cooling and shaping effects of the shoe mold assembly on the toe cap fabric are better.

The invention relates to an all-cotton four-way stretch fabric and a preparation method thereof, and belongs to the technical field of textile dyeing and finishing. The preparation method comprises the following steps: performing singeing, enzyme desizing, liquid ammonia finishing, loose alkali shrinkage and overfeeding soft heat setting on gray fabric to obtain the all-cotton four-way stretch fabric. The warp-wise and weft-wise shrinkage rates of the prepared four-way stretch fabric are-3.0%-0%, the warp-wise elastic elongation rate is 12%-15%, the weft-wise elastic elongation rate is 12%-18%, and the elastic residual elongation rate is smaller than or equal to 8%; obvious warp and weft elasticity can be achieved without elastic fibers, the problems that elastic fabrics such as spandex core-spun yarn fabrics are complex to manufacture, unstable in fabric size and the like are solved, the warp and weft elasticity is obvious, the size stability is good, the hand feeling is soft, and the price is low; the preparation method is simple, does not need equipment transformation, is easy to operate and does not damage fiber strength.

The invention relates to a bi-component fiber and a preparation method thereof, polyester melt and polyamide melt are extruded from a spinneret plate side by side, cross air blowing cooling is performed to obtain nascent fiber, and then the nascent fiber is sequentially subjected to heat pipe heating, oiling, pre-interlacing, three-roller drafting heat setting and winding to obtain the bi-component fiber. The heat pipe is used for heating nascent fibers, and the temperature of the heat pipe is 90-100 DEG C; the three rollers comprise a first hot roller, a second hot roller and a third hot roller; the temperature of the first hot roller is 70-90 DEG C, the temperature of the second hot roller is 110-130 DEG C, and the temperature of the third hot roller is 140-160 DEG C; the filament number of the prepared bi-component fiber is 2.6-3.5 dtex, the breaking strength is larger than or equal to 3.23 cN / dtex, the elongation at break is 27.45-38.31%, the number of broken ends is smaller than or equal to 2.3 times / (48 bits. 24 hours), and the broken filament rate is stably controlled to be 0.30% or below. According to the preparation method, generation of internal stress is greatly reduced; the mechanical property of the bi-component fiber is improved, and the number of broken ends and the broken filament rate of the fiber are obviously reduced.

The invention relates to the field of flame-retardant textile fabrics, and provides a comfortable flame-retardant aramid fabric and a preparation method thereof. The composite filler with the average length of 3.0-8.0 mu m and the diameter of 0.4-1.0 mu m is prepared by adopting the design of multielement blended composite fibers of hydroxyapatite / magnesium hydroxide composite filler, meta-aramid polymer, para-aramid polymer, polybenzimidazole and the like through a hydro-thermal synthesis process of performing silanization surface activation and accurately controlling the molar ratio of calcium to phosphorus to be 1.60-1.67. The preparation method comprises the following steps: preparing the composite filler with the average length of 3.0-8.0 mu m and the diameter of 0.4-1.0 mu m; then industrial production processes such as graded shearing dispersion, continuous wet spinning, multi-stage stretching heat setting and after-finishing are performed, so that synergistic improvement of flame retardant performance and comfort performance is achieved, and the technical problems that a traditional aramid fiber fabric is poor in flame retardant effect, poor in comfort, unstable in processing performance and the like are solved; the fabric has wide application value in high-end application fields such as fire protection clothing, industrial protection textiles and military protection equipment.

The invention relates to the technical field of fiber materials, in particular to a polydopamine modified polypropylene antistatic fiber and a preparation method thereof. The antistatic polypropylene fiber overcomes the problems of poor antistatic effect and mechanical property of the polypropylene fiber. The preparation method comprises the following steps: carrying out step-by-step mixing, melt extrusion, spinning, drafting and heat setting on raw materials such as polypropylene slices, polydopamine modified polypropylene, carbon nanotubes, modified titanium dioxide, modified graphene and the like to obtain the antistatic fiber. The polydopamine modified polypropylene is obtained by modifying polypropylene with dopamine hydrochloride; the modified titanium dioxide is obtained by modifying nano titanium dioxide by using 3-aminopropyltriethoxysilane; the modified graphene is obtained by sulfonating graphene oxide and adding octadecylamine for modification. All the materials and the process cooperate with each other, an antistatic system is constructed on the surface and in the fiber, and meanwhile the mechanical property is improved. The fiber prepared by the method is excellent in antistatic effect and mechanical property, and has a good application prospect.

The invention relates to the technical field of polymer functional material processing, and particularly discloses a polyethylene waterproof breathable film using PTFE micro powder as an opening agent and a preparation method of the polyethylene waterproof breathable film. The waterproof breathable film is prepared from the following components in parts by weight: 50-70 parts of linear low-density polyethylene, 10-40 parts of PTFE (Polytetrafluoroethylene) micro powder, 3-8 parts of a modified compatilizer and an auxiliary agent. The preparation method comprises the following steps: S1, activating PTFE micro-powder by a silane coupling agent and coating the PTFE micro-powder with polyethylene wax to obtain modified micro-powder; s2, uniformly mixing all the components; s3, carrying out melt extrusion at 180-210 DEG C through a double-screw extruder, and carrying out tape casting to form a cast sheet; s4, the casting piece is heated to 90-115 DEG C for two-way stretching, and micropores are formed through interface stripping between the PTFE particles and the base body; and S5, carrying out heat setting at 120-130 DEG C, cooling, and rolling to form the film. Through the synergistic effect of the self-made compatilizer and the pretreatment process, the interface anchoring force is enhanced, the problems of powder falling and water leakage of highly-filled PTFE are solved, and meanwhile, high moisture permeability, high hydrostatic pressure resistance and high mechanical property are taken into account.

The invention discloses a preparation method of a composite current collector base film based on flame-retardant and aging-resistant modified PP and a composite current collector, the method comprises the following steps: 1) preparation of a modified PP master batch: mixing 100 parts by weight of PP resin, 0.5-1.8 parts by weight of a lubricant and 10-25 parts by weight of a flame-retardant and aging-resistant composite filler, and stirring at 100-135 DEG C for 0.5-2 h to obtain the modified PP master batch; (2) carrying out melt extrusion, tape casting and sheet casting to obtain an intermediate sheet; 3) biaxial stretching; and 4) carrying out heat setting, rolling and slitting to obtain the composite current collector base film. The invention provides the PP base film with excellent flame-retardant and aging-resistant performance and good mechanical strength; furthermore, based on the PP base film, the composite current collector is obtained after copper layers are formed on the two surfaces of the PP base film by adopting a conventional water electroplating process, and the copper layers and the PP base film in the composite current collector have high bonding strength, so that the service life of the composite current collector can be effectively prolonged.

The invention discloses a moisture-absorbing breathable polyamide fiber fabric and a preparation method thereof, and relates to the technical field of polyamide fiber fabrics. The method comprises the following steps: preparing a nano silicon dioxide composite template agent, and blending the nano silicon dioxide composite template agent with chinlon slices to prepare modified master batches; after special-shaped hollow spinning and weaving, a pore-foaming agent is dissolved out through hot water treatment, and a porous structure is constructed in the fiber; then carrying out plasma activation on the fabric, and grafting monomers such as acrylic acid, acrylamide and stearyl methacrylate on the surface and in pores of the fiber by adopting a radiation grafting method to form a hydrophilic-hydrophobic dual-channel structure; then, pre-crosslinked composite particles prepared from chitosan, beta-cyclodextrin and the like are loaded in micropores of the fabric through a vacuum-positive pressure circulation process; and finally, treating by using a finishing liquid containing blocked isocyanate, and carrying out heat setting. The prepared fabric has high moisture absorption rate, large moisture absorption capacity and excellent wet air permeability, is washable and anti-yellowing, and is suitable for high-performance sports and outdoor clothes.

The invention relates to the technical field of phase change materials, in particular to a polyamide elastomer composite fiber and a preparation method and application thereof. The preparation method of the polyamide elastomer composite fiber provided by the invention comprises the following steps: (1) taking a polyamide elastomer as a shell material and a solid-liquid phase change material as a core material, and carrying out coaxial melt spinning and curing to obtain a composite fiber precursor; and (2) sequentially carrying out surface crosslinking, drafting and heat setting on the composite fiber precursor to obtain the polyamide elastomer composite fiber. The polyamide elastomer composite fiber obtained by the preparation method has relatively high phase change enthalpy, relatively high energy storage density and relatively high tensile property, and can be used in temperature-adjusting textiles.

The invention relates to the technical field of polymer functional film materials, in particular to a double-layer structure polyester film with high barrier property and a preparation method thereof. The invention discloses a double-layer structure polyester film with high barrier property and a preparation method thereof, and the preparation method comprises the following steps: forming a single-layer gradient melt sheet in situ in a die head through temperature difference-pressure difference cooperative driving; the upper nano barrier layer is oriented and the lower crystal network is enhanced through synchronous two-way stretching; triggering secondary cross-linking through heat setting to permanently lock the gradient structure; and finally, carrying out online surface activation. According to the invention, an integrated single-layer structure is used for replacing the traditional physical lamination, so that the interlayer stripping risk is fundamentally avoided, and the prepared film has ultrahigh barrier property, high strength, excellent interface adhesion and damage self-repairing function, and is suitable for high-end aluminum laminated films, capacitor films and carbon-nitrogen substrate films.

The invention discloses a preparation method of a high-performance electric-breakdown-resistant capacitor base film, which comprises the following steps: S1, preparing modified polypropylene master batch: mixing polypropylene, a cycloolefin copolymer, a barium titanate-carbon nanotube modified composite filler and an antioxidant, and carrying out melt blending, extrusion and granulation to obtain the modified polypropylene master batch; s2, carrying out melt extrusion on the modified polypropylene master batch, cooling and casting; s3, carrying out two-way stretching and heat setting on the obtained casting piece to obtain a polypropylene film; and S4, performing plasma treatment on the surface of the polypropylene film to obtain the high-performance electric-breakdown-resistant capacitor base film. The high-performance electric-breakdown-resistant capacitor base film prepared by the method has excellent electric breakdown resistance, mechanical strength, flame retardance and heat resistance, has a long-acting flame retardant effect, is excellent in comprehensive performance and has a wide market application prospect.

The invention belongs to the technical field of preparation of flexible electronic materials, and particularly relates to a preparation method of a flexible synaptic fabric with a pressure sensing function, which comprises the following steps: firstly, preparing raw materials of the flexible synaptic fabric, including a flexible substrate material, a conductive material, a pressure sensitive polymer, a nanocellulose enhancer and a binder; then preparing conductive fibers loaded with silver nanowires and graphene through two-step dipping, and then sequentially dipping and coating a pressure sensitive polymer and a nanocellulose composite binder; a double-face protruding peak type structure is woven through a warp knitting machine, and finally the flexible synaptic fabric with the pressure sensing function is prepared through heat setting and surface modification treatment. The problems that a flexible pressure sensing fabric structure in the prior art is narrow in pressure sensing range and insufficient in sensitivity response interval can be solved.

The invention discloses a cold-drawing heat-setting high-elasticity cowhells belt composite material, and relates to the technical field of composite materials. The invention relates to a cold-drawing heat-setting high-elasticity cowhells belt composite material. The composite material is prepared from the following raw materials in parts by weight: 12 to 18 parts of nano calcium carbonate, 0.1 to 0.4 part of silane coupling agent KH-550, 30 to 40 parts of modified thermoplastic polyurethane, 18 to 22 parts of ethylene-vinyl acetate copolymer, 5 to 8 parts of natural rubber, 3 to 5 parts of diisononyl phthalate, 0.3 to 0.5 part of compound antioxidant, 0.2 to 0.4 part of ultraviolet light absorber UV-9, 6 to 8 parts of aramid short fiber and 0.2 to 0.5 part of zinc stearate. 10 to 15 parts of modified polyethylene terephthalate fiber, 0.2 to 0.3 part of graphene and 0.5 to 1.5 parts of organic silicon treatment liquid. According to the cold-drawing heat-setting high-elasticity cowhells belt composite material, a matrix is reinforced through modified thermoplastic polyurethane and modified polyethylene terephthalate fibers, and the strength is improved through aramid short fibers subjected to plasma pretreatment. Molecular orientation is optimized by a cold drawing and heat setting process, weather resistance is enhanced by an organic silicon coating, and good overall elasticity, high strength and excellent wear resistance and weather resistance are achieved.

The invention relates to the technical field of high polymer materials and synthetic fibers, and particularly discloses a high-wear-resistance polyamide fiber and a preparation method thereof. The fiber is prepared by taking polycaprolactam as a matrix, compounding spherical nano silicon carbide and molybdenum disulfide nanosheets as wear-resistant components, taking a maleic anhydride grafted hydrogenated styrene-ethylene-butadiene-styrene block copolymer as an interface compatilizer, and taking hyperbranched polyamide-amine as a dispersing agent. The polyester fiber is prepared through the processes of master batch preparation, melt spinning, multi-stage hot drafting and relaxation heat setting. Through the synergistic effect of all the components and the optimization process, the wear resistance of the fiber is remarkably improved, and meanwhile, the common problems of toughness reduction and fatigue resistance deterioration in high-wear-resistance modification are effectively solved. The polyamide fiber is tough and durable, is specially used for manufacturing high-safety-requirement products such as mountaineering ropes, rescue ropes and industrial lifting belts, and can reduce the fracture risk in repeated use and guarantee the use safety.

The invention belongs to the technical field of preparation of composite fibers, and particularly relates to a preparation method of a heterocycle-containing polyamide composite fiber, which comprises the following steps: under the protection of inert gas, mixing a heterocycle-containing diamine monomer and terephthaloyl chloride in a polar solvent in proportion to prepare heterocycle-containing polyamide; mixing the amino modified cellulose nanomaterial, a tannic acid modified metal oxide and a Schiff base oligomer to form a composite dispersion liquid, adding heterocycle-containing polyamide, a lithium salt and a cross-linking agent into the composite dispersion liquid, dissolving and defoaming to obtain a spinning solution, and extruding the spinning solution into a coagulating bath through wet spinning; and carrying out multi-step washing, drying and heat setting treatment to obtain the heterocycle-containing polyamide composite fiber.

The invention discloses a preparation method of a heat-resistant, flame-retardant and electric-breakdown-resistant modified polypropylene capacitor base film. The preparation method comprises the following steps: S1, preparing composite intercalation organic montmorillonite and microcapsule type reinforced particles; s2, preparing a modified polypropylene master batch: mixing the polypropylene master batch, the composite intercalated organic montmorillonite, the microcapsule type reinforced particles, an initiator and an auxiliary agent, heating and stirring to obtain the modified polypropylene master batch; s3, adding polyvinylidene fluoride into the premix, heating and stirring, and carrying out melt extrusion on the obtained mixture; s3, cooling the casting piece; s4, biaxial stretching, heat setting, cooling and corona treatment are carried out, and the heat-resistant, flame-retardant and electric-breakdown-resistant modified polypropylene capacitor base film is obtained. The polypropylene is filled and modified through the composite intercalation organic montmorillonite and the microcapsule type reinforced particles, and the polyvinylidene fluoride is compounded and added, so that the heat resistance, flame retardance, electric breakdown resistance and mechanical strength of the polypropylene capacitor base film can be comprehensively improved.

The invention relates to the technical field of optical thin films, and particularly discloses a high-birefringence laminated reflecting film and a preparation method thereof. According to the laminated reflecting film, 4, 4 '-biphenyl dicarboxylate modified PET is used as a raw material of an A layer, PMMA or PETG is used as a raw material of a B layer, the difference value of the glass transition temperatures Tg of the raw material of the A layer and the raw material of the B layer is controlled to be smaller than or equal to 5 DEG C, and the laminated reflecting film formed by alternately laminating the raw material of the A layer and the raw material of the B layer is subjected to synchronous two-way stretching and heat setting treatment; according to the application, PET is modified by the BB monomer, and a biaxial stretching process and the content of the BB monomer are regulated and controlled for the first time, so that Tg difference values of the raw materials of the layer A and the raw materials of the layer B are close, meanwhile, a refractive index difference value is increased, the reflecting film with excellent optical performance and mechanical performance can be obtained with a small number of lamination layers, and the reflecting film has high in-plane birefringence, high in-plane birefringence, high in-plane birefringence, high in-plane birefringence, high in-plane birefringence and high in-plane birefringence. And the reflectivity reaches 74% or above.

The invention discloses a full-biodegradable bamboo fiber film material and a preparation method thereof. The full-biodegradable bamboo fiber film material is composed of a bamboo fiber composite matrix, a biodegradable reinforcing system and a multifunctional cross-linking agent. The bamboo fiber composite matrix is a mixture of bamboo pulp fiber pretreated by supercritical CO2 and microcrystalline cellulose; the biodegradation enhancing system is composed of nano calcium carbonate-montmorillonite composite particles and a polylactic acid-glycolic acid copolymer, and the composite particles are modified by a silane coupling agent; the multifunctional cross-linking agent is an esterification product of citric acid and glycerol. The preparation method comprises the steps of bamboo fiber supercritical pretreatment, composite reinforced particle preparation, melt extrusion, two-way stretching, gradient heat setting and the like, and finally the antibacterial surface layer is formed through chitosan surface treatment. The material realizes the balance of biodegradability and mechanical properties through raw material synergy and process optimization, and is suitable for the fields of packaging, agricultural coverage and the like.

The invention discloses a high specific surface area polyester fiber and a preparation method thereof, polybutylene terephthalate, polyethylene glycol and an antioxidant are put into a twin-screw extruder in proportion to obtain modified polyethylene glycol, the modified polyethylene glycol is used as a sea phase, the modified polyethylene glycol and PET are used as an island phase to carry out melt blending spinning, and after heat setting, drafting is carried out to obtain a sea-island fiber with PET as the island phase. An alkali dissolution-alcohol dissolution synergistic effect system is constructed by utilizing the alkali dissolution characteristic of low-molecular-weight polybutylene terephthalate and the alcohol dissolution characteristic of polyethylene glycol in the marine phase component, under the condition of 50-60 DEG C, an alkali agent directionally breaks ester bonds of polybutylene terephthalate, an alcohol solvent synchronously dissolves polyethylene glycol, efficient marine phase stripping is achieved, and the service life of the marine phase component is prolonged. And finally, the high-specific-surface-area polyester fiber with a complete structure and an excellent specific surface area is prepared.

The invention relates to the technical field of continuous fiber reinforced composite materials, in particular to warp yarn for window decoration and a preparation process of the warp yarn. According to the invention, the problems of poor mechanical property and poor antibacterial property of traditional warp yarns for window decoration are solved. The preparation method comprises the following steps: mixing Bio-EG and Petrol-EG according to a ratio, reacting with terephthalic acid, precisely controlling the temperature, and adding a phosphorus stabilizer to obtain a high-performance polyester core material; chitin is modified by DMAA, nano silicon dioxide is modified by KH-560, and the chitin and the nano silicon dioxide are subjected to melt blending with a PLA matrix to form a reinforced sheath material; the sizing agent is composed of WPU, amino silicone oil microemulsion and other substances, and a protective film is formed on the surface of the fiber after the process is optimized; through core-sheath composite spinning and post-treatment processes such as segmented cooling, drafting and heat setting, the prepared warp yarn has high strength, high elongation, wear resistance, resilience and good antibacterial functions.

The invention relates to the field of textile fabrics, and discloses a polylactic acid fabric and a preparation method thereof. The polylactic acid fabric is prepared by weaving polylactic acid fibers, the polylactic acid fibers are prepared by melt spinning of a polylactic acid material body, and the polylactic acid material body is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic acid resin, 12-20 parts of a heat-resistant moisture absorbent, 6-10 parts of a toughening agent and 0.2-0.4 part of an antioxidant; the heat-resistant moisture absorbent is prepared from lignin fibers, poly (ethylene 2, 5-furandicarboxylate), poly (butylene adipate-co-terephthalate) and a dispersing agent. The preparation method comprises the following steps of melt spinning, rib knitting, heat setting, dyeing and aftertreatment. The polylactic acid fabric prepared by the invention has better heat resistance, moisture absorption and shrink deformation resistance, and is suitable for scenes with higher requirements on heat resistance and moisture absorption, such as underwear or infant clothes.

The invention discloses a polyetherketoneketone fiber anti-adhesion porous spinning method. The method comprises the following steps: dissolving polyetherketoneketone to obtain a spinning solution, and extruding the spinning solution through a porous spinneret plate to form a plurality of spinning trickles; the trickles enter a first coagulating bath to be preliminarily coagulated and formed, and fibers are obtained; dividing the fibers by a split type dividing plate, guiding the fibers into a second coagulating bath by a godet, washing with water, applying oil, and then drying; fibers enter the hot drafting device to be subjected to multi-stage hot drafting, and after heat setting, the fibers are tidied and wound by the buncher. The first coagulating bath is provided with a bath lotion supplementing unit, a circulating filtering system and an ultrasonic generator which are combined to quickly and uniformly update components of the coagulating bath; and the split type filament separating plate keeps a distance between fibers, prevents mutual adhesion and improves the double-diffusion efficiency in the second coagulating bath. The ultrasonic-assisted circulating filtration system is used for updating the synergistic effect of the coagulating bath and the split type filament separating plate, so that the problems that fibers are easy to adhere and are uneven in evenness and performance are effectively solved.

The present application relates to the technical field of discontinuous reinforced short fibers, in particular to a high-performance composite short fiber and a preparation method thereof.The present application overcomes the contradiction between the hygroscopicity and mechanical properties of the composite short fiber and the problem of poor skin-core interface compatibility.By reacting acidified carbon nanotubes with hydroxyl-terminated hyperbranched polyester, and then melt extruding with PET chips, a high-strength core layer master batch is obtained;high-density polyethylene, a hydrophilic agent, hydrophilic modified MOF particles and E-GMA copolymer are mixed and extruded to obtain a skin layer PE master batch with long-term hydrophilicity;the skin and core layer master batches are spun into a skin-core structure, and after ring blowing cooling, two-bath drafting, heat setting, mechanical crimping and cutting, a composite fiber is obtained.The prepared PE / PET bicomponent composite short fiber not only has excellent tensile strength, but also has persistent and stable moisture absorption and sweat releasing functions.

A hot melt adhesive composition comprises a thermoplastic polyether ester block copolymer. The thermoplastic polyether ester block copolymer comprises 75 wt% to 85 wt% of polyester hard segments and 15 wt% to 25 wt% of polyether soft segments, the polyester hard segments are composed of aromatic polyester benzene ring functional groups reprocessed from recycled polyester products. The thermoplastic polyether ester block copolymer has a hardness of 35 shore D to 50 shore D and a melting point of 90 DEG C to 110 DEG C, and the proportion of regenerated PET is not less than 20 wt%. The present application also provides a hot melt adhesive film formed by the hot melt adhesive composition, and a shoe reinforcement comprising the hot melt adhesive film. The shoe reinforcement has an elastic loss rate of 25% or less. By using the hot melt adhesive composition, the shoe reinforcement can be obtained by heat setting treatment below 90 DEG C and has good resilience. In addition, using the hot melt adhesive composition to make the shoe reinforcement also helps the recycling of the whole shoe.

The application discloses a kind of high-efficiency polytetrafluoroethylene filter material and preparation method thereof, it is related to filter material technical field, including following process: polytetrafluoroethylene base band is stretched in three directions, and ePTFE layer is obtained;ePTFE layer is placed above non-woven fabric layer, laminated, compounded, heat setting, and filter material is obtained.The application is based on horizontal and vertical stretching, and the middle part of polytetrafluoroethylene base band is stretched upward or downward arc by adopting olive-shaped roller, and reaction force is applied to both sides, so that the thickness of the middle of polytetrafluoroethylene base band is less than the thickness of both sides, the compensation of horizontal expansion stretching is formed, the complete stretching of polytetrafluoroethylene base band is promoted, the generation of node is reduced, the degree of fiberization of film is improved, the pore shape tends to be complex, the three-dimensional space structure of pore in ePTFE layer is generated more, and the pore performance and strength are optimized, so as to improve the filtering efficiency and mechanical strength of the prepared filter material.

This utility model discloses a fabric take-up mechanism for a heat setting machine, relating to fabric heat finishing equipment technology. The key technical points are: it includes a frame and a take-up roller. Two symmetrically arranged mounting brackets are rotatably connected to the frame, which also houses a first adjusting roller and a second adjusting roller. The first adjusting roller exerts a downward vertical force on the fabric, which is balanced with the fabric's tension. When the taken-up fabric becomes longer due to setting, the tension is less than the force exerted by the first adjusting roller, causing the first adjusting roller to move downwards. This moves the second adjusting roller away from the take-up roller, lengthening the fabric between the second adjusting roller and the take-up roller, thus re-tensioning the fabric and restoring the tension to balance with the force exerted by the first adjusting roller. This design allows the first and second adjusting rollers to adjust the fabric tension on the take-up roller in real time, reducing the likelihood of wrinkles appearing on the fabric.

The invention relates to the field of spinning, and particularly discloses a polyester filament yarn preparation process which comprises the following steps: drying polyester chips, mixing the dried polyester chips with a hydrophilic agent, carrying out melt spinning to form nascent fibers, adopting a linear spinneret plate during spinning at the spinning speed of 4000-6000 m / min, carrying out traction treatment, carrying out heat setting treatment, carrying out alkali treatment, and winding to obtain the polyester filament yarn. Preparing polyester filament yarns; wherein the hydrophilic agent is a mixture of PEG (Polyethylene Glycol) 2000 and PEG 400 in a mass ratio of 1: (2-3). The preparation method has the characteristic that the prepared polyester filament yarn has better hygroscopicity and more excellent mechanical properties.

The invention discloses warp knitting fabric crease treatment equipment which comprises a discharging sub-assembly, a pretreatment assembly, a warp-direction treatment assembly, a weft-direction treatment assembly, a heat setting assembly and a collecting assembly which are sequentially arranged in the fabric conveying direction. The warp-direction processing assembly comprises a plurality of groups of action rollers provided with reverse oscillation mechanisms and differential driving mechanisms, and can apply dynamic warp-direction tension and high-frequency oscillation to the fabric; and the weft-direction processing assembly performs weft-direction expanding oscillation on the fabric through an expanding guide rail with an adjustable distance. And the equipment is integrated in the mounting hood, and all functional chambers are isolated, so that the heat and humidity management efficiency is effectively improved. According to the invention, through cooperative mechanical oscillation and differential traction in the warp and weft directions and in combination with controllable steam heat setting, various creases and internal stress generated in production and packaging of the warp-knitted fabric can be efficiently and automatically eliminated, meanwhile, the fabric is prevented from being damaged, and the treatment quality and efficiency are remarkably improved.