204results about "Monocomponent polyurethanes artificial filament" patented technology

To provide polycarbonate diol which, in the case where polycarbonate diol is used as a polyurethane raw material containing a structural unit derived from straight-chain aliphatic diol having a carbon number 2 to 20 such as 1,6-hexanediol, has excellent mechanical characteristics of obtained polyurethane, suppressed variation of the mechanical characteristics from the viewpoint of quality uniformity, and furthermore excellently maintained chemical resistance.SOLUTION: Polycarbonate diol contains a structural unit (1) expressed by the following general formula (I) and a structural unit (2) expressed by general formula (II). -R-O-C(=O)-O- (I) (in general formula (I), R denotes a hydrocarbon group with a carbon number 2 to 20 which may have substituent or hetero atom.) -(CH2)m-N(R2)-C(=O)-O- (II) (in general formula (II), m is an integer of 2 to 20. R2 denotes an alkyl group or hydrogen atom with a carbon number 1 to 20 which may have substituent.)SELECTED DRAWING: None

The invention belongs to the technical field of thermal management materials, and provides aerogel fibers of a three-dimensional porous structure and a preparation method and application of the aerogel fibers. The preparation method comprises the following steps: preparing a polyurethane spinning solution by taking N, N-dimethylformamide as a solvent; then carrying out wet spinning on the polyurethane spinning solution to obtain wet gel state fibers; and immersing the wet gel-state fiber into an organic solvent for solvent exchange, and drying after the solvent exchange is completed to obtain the aerogel fiber. The method is simple, low in cost and low in equipment requirement, efficient and continuous production of the aerogel fibers can be achieved, different spinning solutions can be adopted for preparing the aerogel fibers of different pore structures, meanwhile, the problem that the porous structures of the aerogel fibers are prone to collapsing when the aerogel fibers are dried at normal pressure is solved, and the aerogel fibers are suitable for large-scale production. The aerogel fiber with the three-dimensional porous structure is stable in porous structure, not prone to collapse, excellent in mechanical property and excellent in heat preservation and heat insulation performance.

According to the elastic fabric provided by the invention, the TPU fiber is used as an elastic fiber material of the elastic fabric, the TPU fiber is processed into the elastic yarn, and the woven fabric with excellent elasticity and good hand feeling is obtained through the structural design of the elastic yarn and the fabric in combination with a corresponding processing textile dyeing and finishing process. According to the elastic fabric and the preparation method thereof, the elastic fabric has excellent elasticity, the warp-direction elastic elongation of a woven fabric can reach 35-70%, the weft-direction elastic elongation of the woven fabric can reach 80-130%, the warp-direction elastic elongation of a knitted fabric can exceed 180-250%, and the weft-direction elastic elongation of the knitted fabric can reach 250-360%; the fabric is low in elasticity modulus and low in elastic recovery rate, and clothes made of the fabric are weak in constraint feeling when worn; a special wrinkle style can be obtained on the surface of the fabric, and the fabric has excellent hand feeling; the invention further provides a method for stably processing and preparing the elastic knitted fabric.

The present invention relates to the field of the preparation of polyurethane elastic fibers, and relates to a preparation method for a bio-based polyurethane elastic fiber, comprising: preparing polyether polyol from sucrose, glycerol, dimethylamine and propylene oxide; adding a solvent, i.e., N,N-dimethylacetamide, and polyether polyol and polyisocyanate into a reaction tank, and adding p-Toluenesulfonyl semicarbazide and aluminum methylenebis(2,4-di-tert-butylphenoxy) phosphate to prepare a spinning solution; and subjecting the spinning solution to spinning and oil application by means of dry spinning technology to obtain the bio-based polyurethane elastic fiber. The present invention ensures that the properties of polyurethane elastic fibers do not deteriorate or are partially enhanced, while the cost and performance advantages are achieved.

The invention discloses a method for preparing micro-nano fibers through needle-free electrostatic spinning equipment assisted by an ion blower gun, and belongs to the technical field of spinning. The method specifically comprises the following steps: S1, dissolving a high-molecular polymer in a proper solvent to prepare a spinning precursor solution; and S2, preparing the micro-nano fiber from the spinning solution on a suitable collection surface by using an ion blower gun assisted needleless electrostatic spinning device. Through the synergistic effect of directional airflow generated by the ion blower gun and a controllable electric field, fiber surface charges are effectively neutralized, the jet instability is inhibited, and the controllability of a fiber flight path is improved. Meanwhile, the ionic wind assists in enhancing interface attachment between the fiber and the collector, uniform deposition is promoted, and the compactness and adhesive force of the fiber membrane are remarkably improved. According to the method, chemical modification does not need to be carried out on a material system, the intrinsic performance of the fiber is kept, universality and expandability are achieved, and a new path is provided for continuous preparation of the high-performance micro-nano fiber.

The invention relates to a preparation method of polyurethane-urea elastic yarn, the polyurethane-urea elastic yarn is composed of polyol and diisocyanate polymer, and the preparation method is characterized in that the polyol and diisocyanate are adopted to prepare a prepolymer with an end-capping ratio (CR) of 1.30-1.65, the addition amount of trimethylolpropane is 0.2-5.0 wt% relative to the weight of the polyurethane-urea yarn, the addition amount of trimethylolpropane is 0.2-5.0 wt% relative to the weight of the polyurethane-urea yarn, and the addition amount of trimethylolpropane is 0.2-5.0 wt% relative to the weight of the polyurethane-urea yarn. According to the present invention, the present invention relates to a polyurethane urea elastic yarn having improved heat resistance and resilience while maintaining stretch properties (elongation), and to a method for preparing the same.

Provided are: polyurethane elastic fibers that achieve heat resistance, adhesiveness, and reelability and that are suitable for a gather member; a winding body therefor; a gather member; and a sanitary material. The present invention relates to: polyurethane elastic fibers that are multifilaments and that contain urethane bonds and urea bonds, the polyurethane elastic fibers being characterized in that the ratio of the urea bonds with respect to the urethane bonds is 0.05 to 5%; a winding body of said polyurethane elastic fibers, wherein the elongation rate of the polyurethane elastic fibers on the winding body is 0.05 to 10%; a gather member; and a sanitary material.

The invention discloses PU fiber toughened ultrathin hydrogel and a preparation method thereof.The preparation method includes the steps that S1, TPU particles are dissolved in a THF and DMF mixed solution and stirred overnight, a 10-20 wt% TPU electrostatic spinning solution is obtained, electrostatic spinning is conducted on the TPU electrostatic spinning solution, the TPU electrostatic spinning solution is collected on a customized metal plate, and a metal plate spun with PU fibers is obtained; s2, preparing a hydrogel precursor solution; and S3, absorbing the metal plate spun with the PU fibers on a spin coater or a blade coater, taking out the hydrogel precursor solution from the water bath kettle, rapidly dripping the hydrogel precursor solution on the PU fibers, and standing to obtain the PU fiber and hydrogel fused ultrathin hydrogel. The hydrogel prepared by the invention has super-strong stretchability in a large strain range of 0-600%, and realizes skin fitting adhesion and stable acquisition of multi-scale signals in human motion.

An elastic fabric and a manufacturing method therefor. TPU fibers are used as elastic fiber materials, the TPU fibers are processed into elastic yarns, and by means of structural designs of the elastic yarns and a textile, and in cooperating with textile dyeing and finishing processes for corresponding processing, the fabric having excellent elasticity and good hand feel is obtained. The warp-direction elastic elongation of a woven fabric can reach 35-70%, and the weft-direction elastic elongation thereof can reach 80-130%; the warp-direction elastic elongation of a knitted fabric can reach 180-250%, and the weft-direction elastic elongation thereof can reach 250-360%; the textile has low elastic modulus and low elastic recovery rate, and garments made from this textile deliver minimal wearing constriction; the surface of the textile can achieve a special crepe style and has excellent hand feel.

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).

The invention provides a degradable fiber temporary plugging agent and a preparation method thereof, and belongs to the technical field of oil-gas field development. The temporary plugging agent is composed of polylactic acid-polyurethane block copolymer fibers, and the preparation method of the temporary plugging agent comprises the steps that S1, lactide and an initiator containing dihydroxyl are subjected to ring opening polymerization under the action of a first catalyst, and a hydroxyl-terminated prepolymer is formed; s2, reacting the prepolymer with diisocyanate under the action of a second catalyst to synthesize a polylactic acid-polyurethane block copolymer; s3, preparing fibers through a melt spinning or electrostatic spinning process; the degradation rate and the mechanical property of the fiber can be regulated and controlled by regulating and controlling the initiator type, the diisocyanate type, the isocyanato index R value and the catalyst dosage, so that the fiber is suitable for the wide-temperature-range reservoir conditions of 45-120 DEG C, and the technical problems of contradiction between the strength and the degradability, narrow temperature adaptability, secondary damage to the reservoir and the like of a traditional temporary plugging agent are effectively solved.

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).

Provided are a thermoplastic polyurethane (TPU) self-crimping conjugate fiber and a fabric. The TPU self-crimping conjugate fiber comprises: a first component including a first TPU and a second component including a second TPU, which is a TPU other than the first TPU. Wherein the first TPU has a damping factor (tanδ) peak within the temperature range from 20° C. to 100° C.; the second TPU has a tanδ peak within the temperature range from −50° C. to 70° C. Based on the total weight of the first component, the content of the first TPU is 50% by weight or more. The first TPU has a structural unit represented by Formula (I):wherein each R independently is an alkylene group having 2 to 8 carbon atoms or —CH2CH2OCH2CH2—; n is a number from 2 to 13; and the structural unit has a Mn ranging from 700 g / mole to 2500 g / mole.

A fibrous composite material comprising a first electrospun polymer fibre population; and a second electrospun polymer fibre population dispersed within at least part of the first electrospun polymer

The lightweight melt-blown hot-melt nonwoven fabric containing hydrophobic nanosilica according to the manufacturing method of the present invention performs an adhesive function when interposed between adherends such as fabric, even if a smaller amount of adhesive resin is applied than a conventional hot-melt film, it has the effect of saving material costs and energy by about 10 to 50% while ensuring uniformity of adhesive strength for each section, excellent peel strength, and good breathability. As a result, fabric products using the melt-blown hot-melt nonwoven fabric can prevent overflow during the adhesion process and achieve lightness and a soft texture.

The present invention provides a highly sensitive carbon nanotube-based flexible humidity sensor and a method for preparing the same. A highly dispersed carbon nanotube conductive ink is impregnated onto a flexible non-woven fabric as a humidity-sensitive layer using a padding method, and nanofibers are sprayed onto the fabric using electrospinning technology as an encapsulation layer to prepare a highly sensitive carbon nanotube-based flexible humidity sensor. The carbon nanotube conductive ink used is uniformly dispersed by sodium heparin, and the presence of sodium heparin gives the sensor higher humidity sensitivity and biosafety. In addition, a viscose fiber non-woven fabric with a three-dimensional porous mesh structure is used as the flexible substrate, and a nanofiber layer is used as the encapsulation layer, both of which have good flexibility, hygroscopicity, breathability, and comfort. The sensor has the advantages of high sensitivity, fast response speed, and high biosafety, and has broad application prospects and market prospects in the fields of flexible sensing equipment, medical care, biosensing, agricultural environmental protection, and the like.

The invention belongs to the technical field of preparation of polymer fiber materials, and discloses a method for preparing polyurethane fibers based on graded polymerization of high-molecular-weight polyurethane. Polydihydric alcohol and diisocyanate are prepared into a prepolymer solution, then first-stage chain extension, second-stage chain extension and curing, third-stage chain extension and other steps are sequentially carried out, the polymerization degree is gradually increased, and finally the polyurethane fiber is prepared through dry spinning. According to the method, implosion and gelation risks in the chain extension reaction are effectively avoided, and gradient increase of the molecular weight can be achieved. Particularly, bis (dimethylaminoethyl) ether is introduced after curing is finished, part of residual NCO groups can be promoted to be subjected to a cross-linking reaction in a spinning channel, and the acting force between molecular chains is enhanced, so that the stability of the spinning process is improved, and the comprehensive performance of the fiber is improved.

To provide: a polyurethane urea elastic fiber and a method of manufacturing the same by modifying structure and a terminal of a molecular chain of polyurethane, where temporal stability of yarn physical properties and spinning stability are both excellent with existing stretchability not impaired; and also the polyurethane urea elastic fiber and the method of manufacturing the same by using a polyurethane urea elastic fiber obtained thereby, where stock management and processing condition management of the fiber are made easy and a cloth having stable fabric physical properties or fabric quality can be obtained.SOLUTION: A polyurethane urea elastic fiber includes: a polyurethane urea copolymer A including a molecular chain in which polymer diol, diisocyanate, and organic amin are starting materials and at least one of terminals is a primary or a secondary amino group; and a polyurethane urea copolymer B including a molecular chain in which polymer diol, diisocyanate, organic amin, and organic carboxylic acid are starting materials, the molecular chain including an amino bond. The primary or secondary amino group at the terminal is contained in a range of 0.1 meq or more and 20 meq or less per 1 kg of the polyurethane urea elastic fiber.SELECTED DRAWING: None

The present invention relates to a composite fiber for obtaining a fiber having a strength at 100% elongation of 0.04 cN / dtex or less,wherein the composite fiber is composed of component X comprising a polyvinyl-based thermoplastic elastomer, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0° C. or lower, and component Y which is an easily soluble thermoplastic polymer,wherein the composite ratio (mass ratio) X:Y of the component X and the component Y is within the range of from 90:10 to 50:50, andwherein the composite fiber has a core-sheath structure in which the component X constitutes the core component, and the component Y constitutes the sheath component, in a cross section of the fiber.

A lightweight meltblown hot-melt nonwoven fabric containing hydrophobic nanosilica, manufactured by the manufacturing method of the present invention, when interposed between adherends such as fabrics to perform an adhesive function, has the effect of saving about 10-50% in material costs and energy while ensuring uniform adhesive strength across sections, excellent peel strength, and good air breathability, even with the application of a smaller amount of adhesive resin than conventional hot-melt films. As a result, the fabric product employing the meltblown hot-melt nonwoven fabric are characterized by the prevention of overflow during an adhesive process and by the realization of lightweight and soft hand feel.

The present invention relates to a novel thermoplastic polyurethane (TPU) staple fiber and a process for producing the same, and to the use of the TPU staple fiber in producing yarns for fabrics used in shoes upper, pants, T-shirt, chair mesh, watch band and hair band, or stuffing materials for down jacket, quilt and cushion, or nonwoven fabric for synthetic leather, apparel and shoe, or organo sheet.

Fibers including a polyurethane or a protein polyurethane alloy. The fibers include a core defined by the polyurethane or the protein polyurethane alloy. The fibers including a protein polyurethane alloy include a protein dissolved within a polyurethane. In some embodiments, the fibers can be made by wet spinning a blended mixture of the polyurethane or protein polyurethane alloy and an organic solvent. In alternative embodiments, the fibers can be made by wet spinning a blended mixture of the polyurethane or protein polyurethane alloy and an aqueous polyethylene oxide solution.

The field of the DISCLOSURE lies in adaptive objects and materials for implementation in textiles, ear buds, wearables and smart clothing. The present disclosure relates to adaptive devices or fabrics, comprising shape memory polymer(s) and optionally thermochromic pigment(s), wherein the device or fabric is obtained by fused deposition molding and has different states it reversibly changes in between depending on heating. The present invention further relates to methods of producing said adaptive devices or fabrics. The present disclosure also relates to the use of said adaptive devices or fabrics, in particular, their use for customizable ear buds, semi-woven textiles, parts of smart textiles, wearables and / or gaming gloves and suits. The present disclosure also relates to an ear bud or hearing aid as well as to an adaptive semi-woven 3D printed textile or clothing item.

The present invention provides a material recycled polyurethane elastic fiber that uses a recovered fabric containing polyurethane fiber and a final product as raw materials, and a method for producing the same. The material recycled polyurethane elastic fiber uses a recovered fabric containing polyurethane fiber, and a component separated by wet specific gravity separation of the fabric is used as at least a part of the raw material, and the method for producing the same.

Polyurethane urea compositions and spandex fibers having high and low temperature heat setting efficiency, fabrics and other articles of manufacture thereof, as well as efficient methods for their production using diamine chain extender mixtures are provided.

The application provides a flexible SERS sensor for sweat marker detection and a preparation method and application thereof.The SERS sensor is a composite structure of a Janus nanofiber membrane and a gold nanoparticle film; the Janus nanofiber membrane is composed of a hydrophilic fiber layer and a hydrophobic fiber layer, and the gold nanoparticle film is closely attached to the surface of the hydrophilic layer of the Janus nanofiber membrane.The SERS sensor has a one-way microfluidic transmission performance, can effectively collect sweat in the hydrophilic layer, and can keep the hydrophobic layer almost dry, thereby enhancing the skin comfort.The preparation method and structure of the SERS sensor are simple, and the SERS sensor has the characteristics of lightness, thinness, softness, stretchability, wearability, high sensitivity, high selectivity, good stability and the like, so that the SERS sensor becomes an excellent SERS sensor material, can measure the pH level and the concentration of lactic acid, uric acid and the like in sweat, and provides real-time data support for health management and disease prevention.

Stretch nonwoven laminates containing high recovery polyurethane elastic fibers, articles of manufacture comprising these stretch nonwoven laminates, and methods of making the stretch laminates and articles of manufacture are provided.

Polyurethaneurea compositions and spandex fiber, fabric and other articles of manufacture thereof with a high low-temperature heat set efficiency and effective methods for their production using mixtures of diamine chain extenders are provided.

The invention relates to a melt-spun thermoplastic polyurethane fiber which comprises a copolymer diol derived from caprolactone and polyether polyol and fabrics made therefrom, both of which are capable of being dyed under disperse dyeing conditions.