609results about "Melt spinning methods" patented technology

The invention provides a multifunctional polyester yarn production system and an intelligent regulation and control method thereof, and relates to the field of chemical fiber spinning engineering. Comprising a multi-source sensing module, the multi-source sensing module carries out real-time acquisition processing on a multi-physics coupling process state set to form process state basic data, and the acquisition processing adopts a multi-type sensing device. And the depth inference processing module is used for carrying out space-time coupling inference processing on the process state basic data to form a process state recognition result. According to the multifunctional polyester yarn production system, through real-time acquisition and depth inference processing of multi-physical field data by the multi-source sensing module, accurate identification and prediction of a process state in a production process are realized. According to the multifunctional polyester yarn production system and the intelligent regulation and control method thereof, a space-time joint prediction model is used, the space-time joint prediction model comprises a graph convolutional network and a long-short-term memory network, space and time characteristics in data are fully mined, and the accuracy of process state recognition is improved.

The application discloses a light-weight moisture-conducting functional fabric and a preparation method thereof, and relates to the technical field of textiles.The light-weight moisture-conducting functional fabric comprises an inner layer and an outer layer, the inner layer is obtained by blending polyester fibers and nylon special-shaped cross-section fibers, and the outer layer is obtained by blending modified polypropylene fibers and hollow polyester fibers; the modified polypropylene fibers are obtained by melting and spinning the mixture of polypropylene chips and modified jade powder and then stretching; the prepared fabric not only has the characteristics of light weight and one-way moisture-conducting capability, can quickly discharge sweat outside the body, realizes dry and cool isolation between the skin and the outside world, and has multiple health protection functions such as persistent antibacterial property, efficient ultraviolet resistance and contact cool feeling.

The invention discloses a jacquard vamp material based on bio-based degradable polylactic acid (PLA) and a preparation method thereof, and relates to the technical field of shoe materials. The jacquard vamp material is of a three-layer jacquard structure formed by integrally weaving PLA composite filaments through a jacquard warp knitting machine. The PLA composite filament is prepared from the following raw materials in parts by weight: 80-95 parts of polylactic acid (PLA) slices, 5-15 parts of poly (butylene adipate / terephthalate) (PBAT), 3-8 parts of a flexibilizer, 1-3 parts of a compatilizer, 0.5-2 parts of an anti-hydrolysis agent and 0.5-1.5 parts of a lubricant. According to the invention, the bio-based PLA is used as a main raw material and is matched with degradable auxiliaries such as PBAT, so that the whole vamp material can be completely biodegraded under a composting condition, the problem of environmental pollution of a traditional vamp is fundamentally solved, and meanwhile, through blending modification of PBAT and the flexibilizer, the flexibility and impact resistance of the PLA material are remarkably improved, and the vamp material has good application prospects. The requirements of the vamp material on softness, wear resistance and durability can be met.

The invention discloses a lignin-derived carbon fiber-based sodium metal battery negative electrode material which is prepared by the following steps: performing granulation and melt-blowing on lignin to obtain lignin fibers, performing pre-oxidation and carbonization treatment on the lignin fibers to obtain lignin-derived carbon fibers, soaking the lignin-derived carbon fibers in a silver nitrate saturated solution, taking out the lignin-derived carbon fibers, and drying to obtain the lignin-derived carbon fiber-based sodium metal battery negative electrode material. And carrying out flash burning treatment to obtain the silver nanoparticle / lignin derived carbon fiber composite material. The invention discloses a composite electrode plate for a sodium metal battery, which is prepared by the following steps: grinding a lignin-derived carbon fiber-based sodium metal battery negative electrode material into a short fiber shape, uniformly mixing with polyvinylidene fluoride and N-methyl pyrrolidone to prepare slurry, coating a negative current collector with the slurry, and cutting into pieces to obtain the lignin-derived carbon fiber-based composite electrode plate. The lignin-derived carbon fiber-based sodium metal battery negative electrode material has a three-dimensional interpenetrating network structure, has a high specific surface area, enables an electric field to be uniformly distributed, inhibits dendritic crystal growth, and is suitable for a sodium metal battery system.

The invention relates to the technical field of fabrics, in particular to a cool-feeling long cilia strip and a preparation method thereof.The cool-feeling long cilia strip is composed of cool-feeling fibers and a long cilia strip base material and is characterized in that the cool-feeling fibers comprise a core layer, a functional skin layer and an outer thin skin layer; the functional skin layer is prepared from the following components: a sulfonated copolyester matrix, catechol grafted master batch, surface modified zeolite nano powder, an anti-hydrolysis agent and an antioxidant, and the functional skin layer also contains introduced Zn < 2 + > and Mg < 2 + >. Zn < 2 + > and Mg < 2 + > which are stably combined on anchoring points of sulfonated copolyester are subjected to hydration endothermic reaction when being in contact with water, so that a cool feeling is generated; the surface modified zeolite nano powder synergistically enhances moisture absorption and water temporary storage by virtue of the specific surface area, and continuously provides water for an ionized hydration reaction to prolong and amplify a cool feeling effect; the catechol grafting structure endows the fiber with antibacterial performance, and long-term stability of the structure is ensured through an interface enhancement effect. And the outer layer hydrophilic polyester is matched, so that the product has comfort, durability and functionality.

The invention relates to the field of textiles, and particularly discloses a preparation process of antibacterial fibers, which comprises the following steps: S1, respectively drying and preparing polymer slices and an antibacterial agent; s2, performing melt spinning on the polymer slices and an antibacterial agent, performing air cooling, and then performing traction and winding to obtain antibacterial fibers; wherein the antibacterial agent is prepared by mixing dodecyl trimethyl ammonium chloride, polyvinylpyrrolidone and core-shell type antibacterial particles according to the mass ratio of (0.4-0.5): (0.1-0.2): 1, the core-shell type antibacterial particles are prepared by loading nano-zinc oxide and nano-silver particles on intercalation modified montmorillonite and then forming a silicon dioxide coating layer through a sol-gel method, and the core-shell type antibacterial particles are prepared from the silicon dioxide coating layer through a sol-gel method. And carrying out spray drying to obtain the core-shell antibacterial particles. The preparation method has the characteristic of improving the antibacterial durability and uniformity of the antibacterial fiber.

The invention relates to the technical field of polyamide fiber manufacturing, and provides a porous polyamide fiber preparation method which comprises the following steps: respectively feeding skin layer polyamide, a cross-linking agent and core layer polyamide into a mouth mold; the pore-foaming agent is decomposed to generate gas, and the gas forms a uniform closed-pore structure in situ on the core layer chinlon; in the fusion cavity, the cross-linking agent is sandwiched between the core layer chinlon and the skin layer chinlon to generate a chinlon material with a skin-core chinlon cross-linked structure; after being pulled out through a spinning nozzle, the chinlon material is bundled through an oiling roller, and after oiling, chinlon fiber tows are formed; the polyamide fiber tows are subjected to graded stretching and winding forming, and finished polyamide fiber products are obtained. Therefore, a uniform closed pore structure is formed in the core layer chinlon through the gas decomposed by the pore-forming agent; a skin-core chinlon cross-linked structure with chemical bonding and low-heat-conduction network functions is formed between the core layer and the skin layer through a cross-linking agent. The thermal conductivity and the weight of the polyamide fiber are remarkably reduced, meanwhile, the polyamide fiber has high strength, and the light and warm-keeping polyamide fiber is obtained.

This invention relates to an apparatus for cooling multiple synthetic monofilaments to produce filaments. The apparatus has a hollow cylindrical cooling channel through which the monofilaments are guided. The cooling channel has multiple longitudinal sections between the monofilament inlet and outlet. Each longitudinal section is formed at least by a permeable wall and is enclosed by an independent air chamber, one of which is connected to a negative pressure source, while another is connected to a pressure source. To generate different cooling airflows within the cooling channel, according to the invention, each air chamber can be selectively connected to either a negative pressure source or a pressure source. Therefore, cooling airflow can be selectively generated within the cooling channel along or against the direction of filament travel.

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 present invention is a device for efficiently cooling a yarn. The device is provided with a hollow main box body 20a disposed below a spinning beam. In an inner space of the main box body 20a, a space through which a plurality of filaments spun from a spinneret travel is defined as a yarn traveling space 31a, and spaces respectively located on both sides of the yarn traveling space 31a in a front-rear direction are defined as a central space 51 and a side space 52 (side space 53). The main box body 20a is formed with a circulation part 21b facing the central space 51 and capable of circulating gas, and an opening 24 (opening 25) facing the side space 52 (side space 53) and capable of circulating gas. A plurality of the yarn traveling spaces 31a are disposed side by side in a left-right direction. Furthermore, the device is provided with a second partition wall 22 (third partition wall 23) that is disposed between the two yarn traveling spaces 31a adjacent to each other in at least the left-right direction, and partitions the central space 51 and the side space 52 (side space 53).

A meltblown system includes a die including a die inlet end to receive molten polymer from a polymer source, a cavity located downstream from the die inlet end through which the molten polymer flows, and a die outlet end to receive the molten polymer from the cavity and deliver to outlet orifices at the die outlet end. A fluid supply includes a channel that delivers fluid to the die outlet end to attenuate fibers formed from molten polymer emerging from the die outlet end. The fluid supply provides fluid at a temperature T2 that differs from a temperature T1 of the molten polymer within the cavity, and the meltblown system is configured to independently maintain the molten polymer within the cavity at the temperature T1 during operation of the meltblown system.

Method for manufacturing yarn, wherein said yarn comprises a plurality of continuous filaments, wherein said method comprises at least the following steps: - the step of spinning, preferably melt spinning, a plurality of continuous filaments; and - the step of treating said plurality of continuous filaments by means of a pressurized fluid supplied by two or more nozzles, and wherein one or more of said nozzles deliver said fluid at a varying pressure and / or rate and / or temperature.

A thermoplastic polyurethane resin elastomer is obtained by reacting an isocyanate compound (I), an aliphatic alcohol (II) having a number average molecular weight determined from the hydroxyl value of less than 300 and having only a hydroxyl group as a functional group, and a polyol (III) having a number average molecular weight determined from the hydroxyl value of not less than 300 and not more than 10,000. The isocyanate compound (I) includes not less than 90 mol % in total of an aliphatic isocyanate compound containing two isocyanate groups and / or an alicyclic isocyanate compound containing two isocyanate groups. The aliphatic alcohol (II) includes not less than 90 mol % of a C12 or lower aliphatic diol. The polyol (III) includes not less than 80 mol % of a copolymerized polycarbonate diol (IIIA) including a linear repeating structural unit represented by formula (A) and a repeating structural unit represented by formula (B).

A solid electrolyte membrane having favorable characteristics and a method of forming the same are provided. A solid electrolyte membrane 40 is composed of a non-woven fabric (ultrafine fiber non-woven fabric) UFN and solid electrolyte particles 4AP incorporated therein. Also, the non-woven fabric UFN includes a fiber (ultrafine fiber UF) made of a resin containing a polar filler. A method of manufacturing the solid electrolyte membrane 40 includes a step of preparing the non-woven fabric UFN including a fiber made of a resin containing a polar filler, a step of applying a slurry S containing the solid electrolyte particles 4AP onto the non-woven fabric UFN, and a step of heating while pressurizing the slurry S on the non-woven fabric UFN. Further, the non-woven fabric UFN is formed by making the resin containing the polar filler be a fibrous form by a laser electrospinning method.

The application discloses a phase change composite microcapsule, a rapid heat management fabric and a preparation method and application thereof. The phase change composite microcapsule with a thorn ball structure is prepared, and the attapulgite with a polarity significantly different from that of the phase change core material is introduced into the shell layer, so that the attapulgite is preferentially dispersed on the surface of the shell layer to form a super-high specific surface area heat conduction structure, and the heat conduction efficiency and the cycle stability are improved. Therefore, the microcapsule prepared by the application has good dispersibility and thermal stability, can be used for preparing a composite phase change fiber by melt spinning and woven into a fabric, realizes the unification of flexibility and high-temperature rapid heat management performance, and breaks through the limitation of low heat conduction efficiency and poor processing adaptability of traditional phase change materials.

The invention relates to the technical field of bio-based polyamide modification, and discloses a bio-based polyamide modified raw material composition for improving the surface hairiness distribution of bunchy yarn, which comprises the following components in percentage by mass: 2.5-6.0% of bio-based polyamide 1010 resin, 0.5-2.0% of maleic anhydride grafted castor oil polyether with the weight-average molecular weight of 3500-5500g / mol, 0.5-2.0% of maleic anhydride grafted castor oil polyether with the weight-average molecular weight of 3,500-5,500 g / mol, 0.5-2.0% of maleic anhydride grafted castor oil polyether with the weight-average molecular weight of 3,500-5,500 g / mol, the functional components are driven to migrate to a surface layer and generate interface secondary bonding by utilizing reaction activity and temperature drop rate coupling among the components and a temperature drop rate difference generated corresponding to an axial variable cross section of the slub yarn, and a thickness heterogeneous interface layer is spontaneously constructed at slubs and details; the technical contradiction that a homogeneous modified material cannot be matched with a non-uniform thermal field is solved, and the physical integrity of the fiber surface is improved.

A method of making a thermoplastic copolyester elastomer-based fiber is disclosed. The method comprises: providing a thermoplastic copolyester elastomer having a number average molecular weight of greater than 35,000 g / mol; and spinning the thermoplastic copolyester elastomer to provide a fiber comprising a spun thermoplastic copolyester elastomer, wherein the spun thermoplastic copolyester elastomer has a number average molecular weight that is 98% or less to 50% or more the number average molecular weight of the thermoplastic copolyester elastomer. A thermoplastic copolyester elastomer-based fiber made according to the aforementioned method and a fabric comprising the aforementioned thermoplastic copolyester elastomer-based fiber are also disclosed.

[Summary] The present invention provides a compact package of buckled crimp yarn having high bulkiness, an inexpensive and safe manufacturing method thereof, and a manufacturing apparatus therefor. That is, it is possible to produce a releasable buckled crimp fiber cake from a high-speed extruded fiber using simple equipment without winding. Since buckled crimp is imparted to said spinning fiber at the same time as solidification, a robust and bulky crimp is imparted. Moreover, since the fiber is compressed into a cake shape in a filament-opened state, compactness of packages and bulkiness of the opened filaments are achieved all at once. Meanwhile, in a traditional buckled crimp imparting method, the crystal structure of a fiber once fixed in a flat yarn state tends to remain, and it is difficult to improve its bulkiness and fastness. Since a winder is not used in the present invention, the equipment is simple, and it is easy to produce many kinds of product in small quantities. Further, in the package according to the present invention, since fibers are laminated in a columnar shape and can be divided along the lamination surface at an arbitrary portion, there is no need for rewinding for subdividing the package. Incidentally, although flat yarn cannot be obtained by the method of the present invention, the versatility of the resulting fiber is not impaired due to the fact that it is inherently crimped, as is the case with wool and cotton yarn. [Problems] With conventional technology, obtaining buckled crimp yarn from a spinning raw material required tedious processes such as spinning, winding, unwinding, buckled crimp processing, and rewinding. In other words, winding requires a high-speed winder and an associated automatic package switching device, and it was not easy to create an inexpensive and safe facility, or to create a facility that is flexible enough to be suitable for small-lot, high-mix production. Moreover, a fiber that has been drawn using rollers goes through a process where it is temporarily fixed as flat yarn. Therefore, even if it is later buckled crimped, the resultant final product is likely to revert to a crystalline structure that was created on the way of the process, making it difficult to obtain a fiber with a robust buckled crimp in terms of yarn quality. Furthermore, with conventional spool-type packages, it is difficult to achieve both compactness of packages and bulkiness of released yarn. [Solution] A fiber-forming fluid is extruded from a spinneret and ejected with a pressurized gas through a narrow hole positioned opposite to the spinneret; and the resultant fiber is made into a rod of fiber having a buckled crimp in a crimping zone provided at the end of said narrow hole; and the rod of fiber is sent and accumulated into a compressing chamber comprising a reverse funnel-like section and a hollow cylindrical section, and a releasable buckled crimp yarn cake is produced by vibrational compression from the downstream side of said compressing chamber.

The present invention relates to the field of textiles, in particular shape-memory polymeric fibers (SMPF) for textile applications or medical applications where shape fixity and recovery can be kept constant over multiple shape-memory cycles. The present invention relates to a covered shape-memory polymeric fiber (cSMPF) (1) having a core fiber (10) comprising a shape-memory polymer fiber and a substantially unstretchable covering yarn (20) wound around the core fiber (10) in a manner that the maximum engineering strain (εmax) of the core shape-memory fiber is reduced to at most the strain at the yield point (εyield) of the uncovered core fiber (10) thus limiting the stretchability or deformation of the core shape-memory fibers and / or textiles and / or fabrics comprising a covered shape-memory fiber during programming or use so as to ensure maximum recoverable strain. Also disclosed is a process for producing a covered shape-memory polymeric fiber (cSMPF) (1), a shape-memory fiber and a shape-memory textile comprising a covered shape-memory polymeric fiber (cSMPF).

Method for manufacturing yarn, wherein said yarn comprises a plurality of continuous filaments, wherein said method comprises at least the following steps:the step of spinning, preferably melt spinning, a plurality of continuous filaments; andthe step of treating said plurality of continuous filaments by means of a pressurized fluid supplied by two or more nozzles,and wherein one or more of said nozzles deliver said fluid at a varying pressure and / or rate and / or temperature.

The present disclosure provides a system and method for producing nanofibers. The system includes an automated track system including a first track having a first face; and a second track having a second face facing the first face of the first track. The first track and the second track are positioned to define a proximal gap and a distal gap. The first track and the second track are adapted and configured to transfer a nanofiber coupled to the first face and the second face from the proximal gap to the distal gap. The system also includes a roving belt that is positioned to be partially disposed within the distal gap and is adapted and configured to decouple the nanofiber from the first face and the second face.

The application belongs to the technical field of textiles, and particularly relates to a high-low temperature TPU monofilament yarn, a processing technology thereof and a knitted vamp, comprising a TPU yarn with a skin-core structure, wherein the TPU yarn comprises a core layer and a skin layer, the core layer is modified for the purpose of improving the melting point, and the melting point of the skin layer is lower than that of the core layer; the core layer is modified by using a TPU raw material, so that the melting point of the core layer is improved, and the problem of poor thermal stability and easy decomposition under high temperature is solved; and the melting point of the core layer is higher than that of the skin layer, so that the processing cost of the whole monofilament yarn is reduced under the condition of modifying and improving the melting point.

The invention belongs to the technical field of textile materials, and particularly relates to a PLA fiber ultraviolet-proof woven fabric and a preparation method thereof. According to the invention, the TiO2-coated SiO2 composite light stabilizer with a core-shell structure is constructed and surface hydrophobic modification is carried out on nano ZnO, so that the contradiction between efficient ultraviolet protection and long-term stability is synergistically solved from the source of the material, and the high efficiency and durability of the ultraviolet protection function are ensured. By combining the special-shaped interface fiber design and the variable square plain weave or honeycomb weave, the unification of physical shielding and wearing comfort is realized, and the sustainable ecological fiber PLA completely replaces the petroleum-based fiber, so that the biodegradable foundation is fundamentally laid, and the application prospect is wide. The adopted inorganic nano screening agent is stable and safe in chemical property, a traditional post-treatment process containing toxic substances is abandoned in the processing process, mild and environment-friendly technologies such as biological enzyme desizing are adopted, white pollution is avoided, and perfect fusion of high performance and environment friendliness is achieved.

The application relates to the field of non-woven fabric production, in particular to a drawing equipment for non-woven fabric production and a control method thereof, which comprises a spinning mechanism for extruding a molten yarn, a drawing mechanism installed below the spinning mechanism and a yarn channel having a leading-in section, a drawing section and a diffusion section in sequence, a cold air generating assembly of an air flow supply mechanism being communicated with the leading-in section to input cooling air flow, a hot air supplementing assembly supplying air to the drawing section through an air outlet channel of an air outlet adjusting piece and an air guide piece, a webbing collecting mechanism having a forming net curtain and an air suction piece, and a control mechanism cooperatively controlling each assembly according to yarn running state parameters monitored by a state detecting assembly; the application can control the drawing air flow, improve the air flow distribution uniformity and inhibit yarn scattering.

The present disclosure relates to a kit. The kit of the present disclosure comprises: a kit body comprising a needle tube and a needle, the first end of the needle being mounted to the needle tube; and a catabolic filling thread comprising a first segment and a second segment connected to each other, at least a part of the first segment being located inside the needle, and at least a part of the second segment being located outside the needle, wherein the catabolic filling thread is a thread made of poly-L-lactic acid. The kit of the present disclosure comprises a catabolic filling thread which can be composed of poly-L-lactic acid, is absorbable, has no residue, and is metabolized into lactic acid in the human body. Such a configuration makes the catabolic filling thread itself not only play a role in filling and tightening when filling surgery is performed using the catabolic filling thread of the present disclosure, but also the lactic acid after its metabolism can still stimulate fibroblasts in the skin and subcutaneous tissue to reconstruct the collagen framework in the human body by using fibroblasts.

The invention relates to a method for producing spunbonded fabric (1), wherein a spinning material (2) is extruded through a plurality of nozzle holes (4) of at least one spinneret (3, 40, 50) in order to form filaments (5), and each of the filaments (5) is stretched in the extrusion direction, wherein the filaments (5) are laid on a perforated conveyor device (10) in order to form a spunbonded fabric (1), and the nozzle holes (4) of the spinneret (3, 40, 50) are arranged along a main axis (6) aligned in the transverse direction (12) relative to the conveyor direction (11) of the conveyor device (10) such that the spunbonded fabric (1) formed on the conveyor device (10) is stretched in said transverse direction (12). The aim of the invention is to allow a reliable adjustment of the spinning width and the weight distribution per surface unit of the spunbonded fabric or allow the weight distribution per surface unit to be kept constant during an ongoing operation using said method. This is achieved in that the spinning material throughput (31) of the nozzle holes (4) is variably set along the transverse direction (12).

Provided is a crystalline silicon carbide fiber containing silicon carbide, boron nitride, and zirconium carbide and having a content of Si of 64% by weight or more and a content of C of 28% by weight or more, in which the average particle size of SiC crystal grains is 100 nm or more.

The invention provides a spinning device. The spinning device comprises a feeding port, a screw extrusion assembly, a spinning box, a detachable temperature control assembly, a bearing plate and a winding assembly. The screw extrusion assembly is connected with the feeding port. The spinning box body is connected with the screw extrusion assembly. The detachable temperature control assembly is arranged below the spinning manifold body, and the ratio of the length of the spinning manifold body to the length of the detachable temperature control assembly is 1: 1-2.5. The bearing plate is fixed to one end of the spinning manifold and located between the spinning manifold and the detachable temperature control assembly. The winding assembly is coupled with the detachable temperature control assembly. According to the spinning device, production of the thermoplastic liquid crystal polymer fibers can be achieved more easily, the spinnability is improved, and the quality of the generated thermoplastic liquid crystal polymer fibers can also be improved.

The resin composition for melt spinning of the present invention is a filament having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 and a tensile strength of 10 MPa or more. The filament can be produced by forming a molten liquid of a resin composition having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 into a filament shape to provide a formed material, and conveying and concurrently cooling the formed material. The present invention also provides a resin composition for melt spinning being a filament, and a method for producing fiber using a melt spinning apparatus.