322results 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.

An object of the present invention is to provide a polyurethane urea elastic fiber whose physical properties do not change much over time and which retains its initial mechanical properties, and a method for obtaining this fiber by modifying the molecular chain and ends of the polyurethane urea polymer. Another object of the present invention is to provide a polyurethane urea elastic fiber whose use can improve inventory management and fiber processing condition management, and which can be used to obtain a fabric with stable physical properties and qualities, and to provide a method for producing this fiber. The present invention is a polyurethane urea elastic fiber comprising: polyurethane urea polymer A having a molecular chain using a polymer diol, a diisocyanate, and an organic amine as starting materials, and having a primary or secondary amino group on at least one end; and polyurethane urea polymer B using a polymer diol, a diisocyanate, an organic amine, and an organic carboxylic acid as starting materials, and containing an amide bond, wherein the polyurethane urea elastic fiber contains primary or secondary amino end groups in the range of 0.1 meq or more and 20 meq or less per kilogram of polyurethane urea elastic fiber.

The present invention provides a preparation method preparation method for three-layer artificial blood vessel and application thereof. The three-layer artificial blood vessel comprise three layers, electrospinning inner layer, dense middle layer and electrospinning outer layer, the three-layer structure is closely combined and difficult to separate. The inner layer with a cytoskeleton-like structure can promote the formation of intima; the dense middle layer can effectively prevent the leakage of biomacromolecules and increase the puncture resistance of the whole artificial blood vessel; and the outer layer can promote the growth of tissue cells and better integrate with tissue. The three-layer artificial blood vessel provided by the invention has excellent blood compatibility, good flexibility, good puncture resistance and interlayer peeling resistance. The preparation method is convenient and is suitable for industrial scale production.

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.

Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a component present therein. Composite filaments suitable for additive manufacturing may comprise a continuous polymer phase of a first thermoplastic polymer and a second thermoplastic polymer that are immiscible with one another, and electrically conductive particles distributed in the continuous polymer phase, such as microparticles, nanoparticles, or any combination thereof. The first thermoplastic polymer is dissolvable or degradable and the second thermoplastic polymer is insoluble or non-degradable under specified conditions. Removal of the first thermoplastic polymer from a printed part may introduce porosity thereto, thereby inducing or enhancing piezoresistivity within the printed part. An aqueous mixture comprising the electrically conductive particles and the first and second thermoplastic polymers may have water removed therefrom, and the resulting composite residue may be extruded to form the composite filaments.

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.

A novel thermoplastic polyurethane composition is disclosed which comprise the reaction product of a polyisocyanate component, a polyol component, wherein the polyol component comprises a polyester comprising the reaction product of triethylene glycol and / or tetraethylene glycol with a diacid having 6 carbon atoms or fewer, and, optionally, a chain extender component.

The present invention provides a preparation process of a wound closure repair component and a stretcher adapter film, which relates to the technical field of medical devices, and includes: a first fixed body and a stretcher adapter component; the first fixed body is used to be fixed on human skin, and a fixing groove is formed between the first fixed body and the human skin; the stretcher adapter component has a wound contact layer, and the stretcher adapter component can be inserted into the fixing groove so that the wound contact layer fits on the human skin wound. By fixing the first fixed body on human skin, the stretcher adapter component is inserted into the fixing groove formed between the first fixed body and the human skin, so that the wound contact layer on the stretcher adapter component is moved to the wound position and covers the human wound position, which alleviates the technical problem that the wound care film in the prior art is difficult to directly care on the skin, and the wound care film can only be covered on the stretcher, which has the risk of infection.

The invention relates to the field of medical apparatus and instruments, and particularly discloses a preparation method of an instant-penetrating artificial blood vessel containing a silicone rubber elastomer interlayer, which comprises the following steps: preparing a three-layer instant-penetrating artificial blood vessel on a multi-size tubular receiver layer by layer by adopting an electrostatic spinning technology; wherein the middle layer of the three-layer artificial blood vessel adopts a two-channel electrostatic spinning technology, and two-component room-temperature / medium-temperature addition type filling reinforcing silicon rubber is synthesized to serve as a silicon rubber elastomer; wherein the inner layer and the outer layer of the three-layer artificial blood vessel are prepared by adopting thermoplastic polyurethane as a raw material and performing electrostatic spinning treatment. The ready-to-wear three-layer artificial blood vessel prepared by the invention has excellent physical and mechanical properties and biocompatibility, and a special middle-layer silica gel structure is adopted as a core, so that a puncture needle eye can be retracted, a puncture point can be immediately contracted and closed to stop bleeding after puncture and needle withdrawal, exosmosis of serum is avoided, occurrence of postoperative limb edema is reduced, and the bleeding risk is reduced.

The invention discloses a moisture-absorbing and sweat-releasing polyester-spandex blended antibacterial fabric, a preparation method thereof and application of the fabric in underwear, and relates to the technical field of fabrics. When the moisture absorption and sweat releasing polyester and ammonia blended antibacterial fabric is prepared, firstly, phosphorus-containing polyester and dinitrobenzyl pyridine react to obtain modified polyester, the polyester is prepared into fibers through melt spinning, and then reduction is conducted; secondly, enabling thiophene-3-alcohol to react with the polyurethane prepolymer, preparing fibers through a dry spinning process, and enabling the fibers to react with thiophene and 3-aminothiophene to obtain modified polyurethane fibers; finally, the modified polyester fibers and the modified polyurethane fibers are blended into yarn, the yarn reacts with toluene diisocynate and then reacts with isophorone diisocyanate to obtain modified yarn, the modified yarn is woven into fabric, and the moisture absorption and sweat releasing polyester and polyurethane blended antibacterial fabric is obtained. The moisture-absorbing and sweat-releasing polyester-spandex blended antibacterial fabric prepared by the invention has good antibacterial property, antistatic property and mechanical property.

The invention provides a special-shaped spandex monofilament, a preparation method of the special-shaped spandex monofilament, a spinning device and cellosilk. The special-shaped spandex monofilament comprises a multi-leaf-shaped structure. The multi-leaf-shaped structure comprises blades and a central part formed by connecting the adjacent blades; each blade comprises a blade top part, a blade middle part and a blade root part; the blade tops of the adjacent blades are isolated from each other, and the blade middles of the adjacent blades are isolated from each other; the blade root parts of the adjacent blades are connected through a first curved surface which is sunken towards the central part; and the blade top part is a second curved surface which protrudes outwards. The special-shaped spandex monofilament provided by the invention has relatively high profile degree, can be prepared by adopting a spinneret plate, and is simple and convenient to operate, low in requirement on the performance of a spinning solution and high in section profile rate of a product.

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.

The invention relates to the technical field of sensing materials, and particularly discloses a deformation sensing film as well as a preparation method and application thereof. The electrochromic friction nanometer generator sequentially comprises a friction nanometer generator layer, an electrochromic hydrogel layer and a liquid metal net transparent electrode layer from bottom to top. The liquid metal ink and the spinning film are utilized, the flexible dot matrix electrode layer is prepared through silk-screen printing, the friction nanometer generator layer and the electrochromic hydrogel layer are combined, the prepared deformation sensing film achieves point-to-point characterization of a surface deformation field, and the skin deformation monitoring precision is high; the visual real-time representation of the skin deformation field is realized, and professional monitoring personnel are not needed; the self-energized feature is achieved, daily wearing is convenient, and the device can be used in the fields of wearable equipment, electronic skin, tactile perception and the like; and the device has the characteristics of high integration level, high conformality, high efficiency and large-area and large-batch preparation.

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 discloses a preparation method of a bio-based hole cloth fabric. The preparation method comprises the following steps: yarn selection and matching: nylon spandex wrap yarns obtained by wrapping bio-based spandex with bio-based nylon are used as warp yarns A and weft yarns A, and alkali fuse spandex wrap yarns obtained by wrapping bio-based spandex with alkali fuse are used as warp yarns B and weft yarns B; weaving: weaving the selected yarns according to design requirements to obtain a fabric; and dyeing and finishing: sequentially carrying out pretreatment, pre-shaping, alkali decrement, dyeing, soaping fixation and shaping on the fabric to obtain the bio-based hole cloth fabric. According to the material-based hole cloth fabric, the bio-based spandex and the bio-based nylon 56 are adopted as main materials, dependence on fossil fuel is reduced, good sustainability and environment friendliness are achieved, the influence on the environment is reduced, and the requirement of the modern society for environment protection is met.

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.

Provided is a swimsuit that has excellent water repellency / low water retention rate / buoyancy and contributes to enhanced athletic ability. The present invention comprises a woven fabric in which a covering-covered yarn having a polyurethane elastic yarn as a core yarn and a synthetic fiber filament as a sheath yarn is disposed in at least a portion of warp and weft yarns, the polyurethane elastic yarn containing 0.5 to 10 mass% of a cationic high-molecular-weight compound having a number average molecular weight of 2,000 or more and an inorganic chlorine degradation inhibitor, the mass ratio of the cationic high-molecular-weight compound and the inorganic chlorine degradation inhibitor being 0.3 to 3, and the polyurethane elastic yarn including silicone, the synthetic fiber filament being constituted from synthetic fibers including single fibers having a plurality of grooves continuous in the fiber length direction, the depth of the grooves being 1.0-10.0 μm, the width of an inlet being 0.5-10.0 μm, the width of the tip of a protruding part being 10.0 μm or less, the porosity due to the fiber cross-sectional shape of the grooves being 5-30%, and the woven fabric including a flat woven fabric having a porosity of 75% or less and a weft double woven fabric, including a portion in which the flat woven fabric and the weft double woven fabric are repeated at a position covering the buttocks, and being subjected to a water repellent treatment.

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.

The present invention discloses a high-toughness, flame-retardant non-woven fabric and a preparation method thereof, and belongs to the technical field of non-woven fabric preparation. The present invention is used to solve the technical problem that the preparation process of non-woven fabric materials in the prior art is complicated, and the toughness and flame-retardant properties of non-woven fabrics need to be further improved. A high-toughness, flame-retardant non-woven fabric is obtained by alternately stacking polyurethane spinning membranes and composite polyester spinning membranes to obtain a multilayer spinning membrane with upper and lower surface layers being polyurethane spinning membranes, and then steam hot rolling the multilayer spinning membranes. The present invention synthesizes a composite polyurethane having polyethylene glycol and polysiloxane segments, and then modifies it to prepare a polyurethane fiber membrane, and then stacks it layer by layer with a composite polyester spinning membrane composed of modified polysiloxane and polyethylene terephthalate to prepare a composite non-woven fabric, which not only effectively simplifies the preparation process of the non-woven fabric, but also improves the breaking strength, tensile properties and flame-retardant properties of the non-woven fabric material.

Method for producing polyurethane-based textile fibers from articles or materials to be recycled. The method provides at least to dissolve a polyurethane fraction of such articles or materials in a polar solvent, thus obtaining a diluted polyurethane solution.

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.