58results about "Monocomponent polyurethanes artificial filament" patented technology

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).

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.

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.

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 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.

A manufacturing process includes combining a liquid resin with a liquid reactive cross-linking composition to form a reactive core composition. The manufacturing also includes contacting the reactive core composition with a sheath composition including a carrier polymer in a solvent. The manufacturing process further includes wet spinning the reactive core composition with the sheath composition to form a sheath-core fiber including a core including at least one continuous fiber of a reaction product of the liquid resin and liquid cross-linking composition and a sheath surrounding the core. The cross-linking composition reacts with the resin during the wet spinning. The sheath includes the carrier polymer. A continuous poly(glycerol sebacate) urethane (PGSU) fiber comprising PGSU and a continuous PGSU fiber forming system are also disclosed.

The invention discloses a wound dressing with a one-way seepage discharge function, which comprises an inner-layer nanofiber membrane, a middle-layer nanofiber membrane and an outer-layer nanofiber membrane, and the inner-layer nanofiber membrane, the middle-layer nanofiber membrane and the outer-layer nanofiber membrane are all prepared through electrostatic spinning. The inner-layer nanofiber membrane comprises the following raw materials: polyurethane, tetrahydrofuran and N, N-dimethylformamide, the middle-layer nanofiber membrane comprises the following raw materials: polyurethane, polyacrylonitrile, N, N-dimethylformamide and sodium polyacrylate, and the outer-layer nanofiber membrane comprises the following raw materials: N, N-dimethylformamide, polyacrylonitrile and sodium polyacrylate. According to the wound dressing with the one-way seepage discharging function, excessive seepage at the wound is effectively guided out and removed, a microenvironment with appropriate humidity can be kept for the wound, secondary infection of the wound is avoided, and wound healing is promoted. The invention further provides a preparation method of the wound dressing with the one-way seepage discharge function.

The present application relates to fibers having a diameter of 1 nm to 10,000 nm, of one or more biocompatible polymers, wherein the polymers have a backbone which includes a positively charged component from a zwitterionic moiety. Additionally, this application discloses an implantable therapeutic delivery system and its method of formation, comprising a housing defining a chamber, wherein said housing is porous and formed from the fibers. Inside of the housing includes a preparation of cells which release a therapeutic agent from the chamber. The implantable therapeutic delivery system can be used in the treatment of diabetes.

The present invention relates to a polyurethane (PU) fiber filter and patch with maximized antibacterial and antiviral effects, and a method for manufacturing same. The present invention relates to a polymer fiber which is obtained by depositing copper on PU nanofibers and forming nanoneedles consisting of copper oxide thereon, thereby exhibiting maximized antibacterial and antiviral effects due to physical damage to bacteria and viruses along with action by copper ions, and the purpose of the present invention is to manufacture articles using the polymer fiber together with polyvinyl alcohol (PVA) nanofibers, the articles being usable in medical and industrial applications and having antibacterial and antiviral functions, such as filters, masks, gloves, and patches.

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.

To provide a polyether polyol composition which has a high thermal decomposition temperature, is excellent in compatibility with a urethane raw material, has good reactivity as a urethane raw material, and can exhibit excellent tensile resistance when formed into a polyurethane.SOLUTION: The polyether polyol composition comprises a polyalkylene ether glycol and a polyether polyol represented by formula (1). (In the above formula (1), R represents a divalent hydrocarbon group having 2 to 10 carbon atoms, n is an integer of 2 to 40, m is an integer of 1 or more, and s is an integer of 1 to 30.). In Formula (1), a plurality of R's may be the same as or different from each other. ) SELECTED DRAWING: None

The present invention relates to supramolecular biomedical polymers comprising quadruple hydrogen bonding units and to a process for preparing such a supramolecular biomedical polymer and porous biomedical implants thereof. The supramolecular biomedical polymers are particularly suitable for the production of porous biomedical implants that need high strength, elasticity, durability, and slow biodegradation, e.g. medical implants for living tissue regeneration within a mammal, such as the treatment of cardio-vascular diseases, medical prolapses, and hernias.

The invention provides a TPU fiber aggregate based on an environment-improved solvent system and a preparation method, and is characterized in that the preparation method comprises the following steps: S1, mixing DMC and DMAc to obtain a compound solvent, adding TPU particles into the compound solvent, and heating and stirring in an environment of 80-90 DEG C to obtain a spinning precursor solution; and S2, spraying the spinning precursor solution on a receiving carrier of a receiving roller under the action of a high-voltage electrostatic field and air pressure, taking down the receiving carrier, and drying the receiving carrier in a constant-temperature drying oven to obtain a TPU fiber aggregate, thereby efficiently preparing the high-quality micro-nano TPU fiber while realizing the environmental protection of the production process. The problems of insufficient environmental protection property, low production efficiency, poor fiber quality controllability and the like in the prior art are solved.

The present invention provides a polyurethane nanofiber waterproof moisture-permeable film, a preparation method thereof and application thereof. The polyurethane nanofiber waterproof moisture-permeable film is prepared from two kinds of isothiocyanate and two kinds of polyethylene glycol as raw materials, and the polyurethane nanofiber waterproof moisture-permeable film has good water pressure resistance, tensile property, and moisture permeability. In addition, the polyurethane nanofiber waterproof moisture-permeable film is prepared by adopting an electrostatic spinning method, is low in cost, simple to operate and high in production efficiency, and has a good application prospect in the fields of clothing, medical treatment, electronic appliances, and the like.

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.

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

Provided are: a thermoplastic polyurethane resin composition which exhibits good spinnability during melt spinning and has excellent heat resistance and stretchability when processed into a fiber; and an elastic fiber. A thermoplastic polyurethane resin composition according to the present invention contains a resin which is composed of a hard segment comprising an active hydrogen-containing compound and a diisocyanate compound and a soft segment comprising a long-chain polyol and a diisocyanate compound, and has the following characteristics: (a) the number average molecular weight of the hard segment is 800 to 2400 inclusive, the number average molecular weight of the soft segment is 1900 to 4800 inclusive, and the Mh fraction is 15% to 40% inclusive; (b) Mw is 100,000 to 300,000 inclusive, and Mw / Mn is 1.5 to 3.0 inclusive; (c) the distance between hard domains as measured by SAXS is 8 nm to 25 nm inclusive; and (d) the rate of change in the distance between hard domains when heated at 140°C is 30% or less.

To provide an additive and the like. An additive is configured by a polyurethane (A) having a value of V2 / V1 of 1 or more when: a viscosity of when dissolved in dimethylacetamide (DMAc) at 20% by mass at 40°C is set to be V1; and a viscosity after 24 hours have additionally elapsed at 40°C after dissolution is set to be V2.

The invention provides a high-light-transmittance breathable composite fiber membrane and a preparation method thereof. The high-light-transmittance breathable composite fiber membrane comprises a polymer elastic fiber precursor membrane, the surface of the polymer elastic fiber precursor membrane is coated with an optical transparent polymer film forming solution of the high-light-transmittance breathable composite fiber membrane, and after drying and curing, an optical transparent ultrathin polymer breathing coating layer is formed on the polymer elastic fiber precursor membrane; a part of the optical transparent ultrathin polymer breathing coating layer is embedded into pores of the polymer elastic fiber precursor film and forms a gradient refraction transition welding spot structure, and the gradient refraction transition welding spot structure is used for reducing the refraction mutation rate of light at a connecting interface of the polymer elastic fiber precursor film and the optical transparent ultrathin polymer breathing coating layer; and the orientation degree of the polymer elastic fiber precursor film is greater than 80%. The high-light-transmittance breathable composite fiber membrane has high transparency, high light transmittance, high elasticity, excellent breathability and moisture permeability and obdurability at the same time so as to meet the high-end application field of flexible electronic and biological integrated devices.

The present invention addresses the problem of providing a thermoplastic polyurethane elastic fiber having excellent NOx gas-induced yellowing resistance and heat resistance. The present invention relates to a thermoplastic polyurethane elastic fiber characterized by comprising 0.05 wt% to 5.00 wt% of at least one metal compound selected from the group consisting of a metal hydroxide, a metal carbonate, and a metal oxide, wherein the metal compound includes an alkali metal or an alkaline earth metal.

The present invention relates to a method for producing a multifilament by melt spinning a composition containing a thermoplastic polyurethane, comprising: (a) passing the composition in a molten state through a spinneret to obtain an extruded filament; (b) passing the extruded filament through a set of godet rollers; and (c) winding the extruded filament of step (b) onto a bobbin via a winder at a winding speed of 2000-5000 m / min, wherein the thermoplastic polyurethane has a Shore hardness of 68D-90D measured according to DIN ISO 7619-1, as well as to the use of the multifilament of the present invention.

To provide a polyurethane elastic yarn excellent in antibacterial properties and a method for producing the same.SOLUTION: A polyurethane elastic yarn comprises a polyurethane whose main components are a polymer diol and a diisocyanate, and contains a gently water-soluble glass containing a group 1B element and / or a group 2B element and a nonionic surfactant.SELECTED DRAWING: None

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).

The present invention relates to a polyurethane urea composition using an organic solvent that ensures excellent solubility and processability with polyurethane urea and to a method for manufacturing polyurethane urea elastic fiber. According to the present invention, by using a pyrrolidone-based solvent, the reaction can be controlled to obtain a high-molecular-weight polyurethane polymer, and the resulting polyurethane elastomer solution has excellent transparency, does not become cloudy even upon long-term storage, thereby providing good storage stability, is not subject to environmental regulations, and is highly stable during processing due to a high flash point, and is low in terms of residual amount in the elastic fiber, thereby providing the advantage of being harmless to the human body when used in clothing.

The present disclosure is relates to an environmental-friendly artificial leather and a method of manufacturing the same. The manufacturing method of the environmental-friendly artificial leather includes steps in which a first fiber web is formed by meltblown. The method continues with step in which a filament fabric is disposed on the first fiber web. The method continues with step in which a second fiber web is meltblown on the filament fabric, so as to form a multilayer fiber structure. The method continues with step in which the multilayer fiber structure is heat pressed to form the environmental-friendly artificial leather.

To provide an additive manufacturing process utilizing a composite and a continuous filament thereof capable of forming printed parts exhibiting piezoresistive behavior.SOLUTION: A composite filament 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 a specified condition. 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 a resulting composite residue may be extruded to form the composite filament.SELECTED DRAWING: Figure 1