237results about "Natural fibres" patented technology

The invention relate to fibrous mats comprising chitosan nanofibers and, optionally, at least one filler material, at least one additive, or both. The invention also relates to methods of making same, and devices that include a fibrous mat comprising chitosan nanofibers.

The invention discloses a preparation method of bacterial cellulose based carbon nanofibers and relates to a preparation technology of a carbon fiber material. The preparation method comprises the following steps: carrying out purification treatment on bacterial cellulose obtained by bacterial fermentation and carrying out freeze drying, carrying out carbonization treatment by putting the dried bacterial cellulose material into an atmosphere furnace and heating to 600-1200 DEG C, further heating the processed material to graphitize the material, and cooling to obtain the bacterial cellulose based carbon nanofiber material having a three-dimensional net structure. The preparation technology is simple and easy to carry out, is convenient to operate and has low cost. The obtained bacterial cellulose based carbon nanofiber has a good spatial net structure, has excellent mechanical property, thermal stability and conductivity, and can be applied in fields of electron devices, special composite materials, high efficient catalytic materials, biological materials and the like.

The invention discloses a temperature-sensitive hydrophilic cross-linking crystal type polyurethane coating agent, a preparation method thereof and application thereof, and belongs to the technical field of textile chemical engineering. The preparation thereof comprises the following steps of: using a prepolymer method, taking 4,4'-diphenylmethane diisocyanate (pure MDI) as a hard segment, taking polyester polyol or polyether polyol as a soft segment, adding micromolecular diol chain-extension into the segments, and performing self-emulsification to obtain the polyurethane coating agent. After textile is coated by adopting a proper process, the capability of hydrostatic pressure and moisture permeability of the textile is greatly improved, and the moisture permeability of the textile represents higher response accuracy and sensitivity to environmental temperature changes. The response range of the moisture permeability of the finished coated textile to the environmental temperature changes is between about 17.0 and 28.0 DEG C so as to furthest meet the requirement of a human body on comfort.

The invention relates to a method for sorting dry and cool knitted underwear or shell fabrics, comprising the steps of: (1) preliminary treatment according to a conventional method of the enterprise; (2) washing with water; (3) the sorting of a temperature-sensitive type micro-capsule with hydrophobic core material; and (4) post-processing by using a hydrophilic agent. The underwear produced by using the method of the invention has good wet permeability and drying functions, can not only absorb the sudor perspired from the skin of a human body, but also drain the water in the clothes, thus causing the human body to be dry, cool and comfortable.

The present invention relates to a thermal deblocking polyurethane crease-resisting finishing agent. Its composition includes (by wt%) 20-60% of hydroxyl terminated polymer whose average mole mass is 400-6000; 0.1-10% of tribasic alcohol compound; 6-20% of dimethylol carboxylic acid compound; 20-50% of polyisocyanate compound; 6-30% of isocyanate blocking agent and 0.6-6% of ammonia water. Said invention also provides its preparation method and concrete steps.

The present invention relates to re-compounded enzyme preparation and its application in cotton fabric treatment, and is especially one bath and two step enzyme process for pre-treating cotton fabric. Alkaline pectase, cellulase, alpha-amylase, PVA degrading enzyme, proteinase, lipase, xylanase and sugar oxidase are first re-compounded, and the re-compounded enzyme preparation is then used in the one bath and two step enzyme process for pre-treating cotton fabric. The process includes the first desizing and boiling off step in the treating bath at 55 deg.c and pH 8.0 for 60-90 min, with the sugar oxidase reacting with the desizing product to produce hydrogen peroxide; and the second fabric bleaching step with the enzyme process generated hydrogen peroxide at 95 deg.c and pH 11.0 for 60-120min. The present invention has low power consumption, short technological process and environment friendship, and may be used to replace chemical process.

The invention relates to a finishing method of fabric by nano-metal titanium dioxide sol negative oxygen ions. The finishing method comprises the following steps: (1) dissolving butyl titanate in 2/3 of ethanol, mixing evenly, adding ethanol aqueous solution dropwise, and adjusting pH value to 2 by concentrated inorganic acid after finishing adding dropwise, and continuing to stir for 2h to obtain transparent nano-TiO2 sol, wherein, the butyl titanate, an inhibitor, an anhydrous ethanol and water are at a mol ratio of 1:1:10-30:2-4; and (2) soaking the fabric in the sol finishing agent for 3min, then predrying at the temperature of 80 DEG C, baking at the temperature of 120 DEG C for a plurality of 150s, washing and drying at the temperature of 80 DEG C. The method has simple operation process and low baking temperature of 100-180 DEG C and can help realize industrial production.

The invention relates to the method of the preparation of polysaccharide fibers based on hyaluronic acid, a compound comprising hyaluronic acid and metal ions, schizophylan, chitin/chitosan-glucan complex, a compound comprising chitin/chitosan-glucan complex and metal ions, internal mixture of chitin and chitosan, a compound comprising internal mixture of chitin and metal ions, sodium alginate, potassium alginate, ammonium alginate, xanthane, xanthane sodium salt, xanthane potassium salt, oxycellulose, oxycellulose sodium salt, oxycellulose potassium salt, carboxymethyl cellulose, carboxymethyl cellulose sodium salt, and carboxymethyl cellulose potassium salt, or a mixture of polysaccharides, in a non-stationary coagulation bath. Further the invention relates to covers of internal and external wounds and skin defects based on these fibers, and a method of production thereof, and the apparatus for the preparation of polysaccharide fibers.

The invention belongs to the technical field of medical materials, and discloses a moisture-absorbing antibacterial wound dressing. The dressing comprises quaternized chitosan fiber fabric. The substitution degree of quaternized chitosan fibers is 0.1-1.0. The quaternized chitosan fibers are prepared through the following steps that 1, a quaternization reagent is dissolved in anhydrous alcohol or propyl alcohol to obtain a quaternization solution; 2, chitosan fibers are soaked in the quaternization solution and reacted for 1-10 h at 50-100 DEG C; 3, after the reaction is finished, washing and drying are performed to obtain the quaternized chitosan fibers. According to the moisture-absorbing antibacterial wound dressing, while antibacterial performance is improved, moisture absorption is improved, and high wet strength is maintained.

The present invention relates to a method for preparing by wet spinning a continuous filament based on hyaluronic acid in free acid form, notably soluble in water. The preparation method according to the invention comprises the following steps: a) preparing a spinnable aqueous solution of hyaluronic acid or of a hyaluronic acid salt, preferably a sodium hyaluronate solution; b) extruding said solution to an extrusion die; c) forming the filament by passing the extruded solution into a bath of acetic acid, concentrated to more than 80%, drawing and drying. The invention also relates to a filament based on hyaluronic acid in free acid form, said filament having swelling properties in water and physiological liquids and moreover being solubilizable in water under certain conditions.

The present invention relates to a metal phthalocyanine fiber-supported metal phthalocyanine having catalytic activity and preparation method, said metal phthalocyanine with fiber or fabric through covalent bond conjoint mode combining to form supported fiber having catalytic activity. The used etal phthalocyanine is transition metal ion such as characterized in having the structure of formula 1, in which M is a Fe,Co,Cu,Mn,Rb,Al,Zn and Ni; R1,R2,R3,R4 each can be H, any of the five in formular (1), and others are all H, the construction of the radical R5 can be -NH2, -NHCOCH3, -NHSO3Na, and -NHSO3H. Said preparation method is selecting metal phthalocyanine as reactive group having triazine structure under pH 8- 11 reaction temperature 45 -95 degree centigrade condition, adding fiber or fabric to finite concentration reactivity metal phthalocyanine aqueous solution, continuously stirring, after reaction taking out fiber or fabric and respectively to make caustic washing and water washing, drying to obtain fiber-supported metal phthalocyanine or fabric. Said invention has simple equipment, easy to operate etc advantages.

The present invention relates to an ultra-high-flux nano-fiber waterproof gas-permeable membrane and a preparation method thereof, and belongs to the field of textile technology material synthesis. The ultra-high-flux nano-fiber waterproof gas-permeable membrane is prepared from the following two components such as bifunctional group-modified nano-silica particles and a polymer nano-fiber membrane, wherein the nano-fiber membrane uses the bifunctional group-modified nano-silica particles as the adhesive between fibers, such that the rub resistance of the membrane material can be enhanced, the nano-fiber surface roughness can be increased, and the water resistance of the fiber membrane can be increased. According to the present invention, the prepared ultra-high-flux nano-fiber waterproof gas-permeable membrane has characteristics of small pore size, high porosity and enhanced adhesion structure, can provide advantages of high water resistance, high moisture permeable flux and high strength in the waterproof and moisture permeation field, has the moisture permeation flux of more than or equal to 18000 g/m<2>/d, has the water resistance of more than or equal to 100 kPa, and has wide practical application prospects.

The invention relates to ganoderma lucidum fibre with the function of health care and a preparation method thereof. The fibre contains traditional Chinese medicine ganoderma lucidum components; the preparation method comprises the following steps: adding the ganoderma lucidum components into regenerated cellulose fibre spinning liquid, regenerated protein fiber spinning liquid, terylene fibre spinning liquid, orlon fibre spinning liquid and nylon 6 or nylon 66 fibre spinning liquid and adopting conventional spinning to obtain the ganoderma lucidum fibre. The fibre can reinforce the resistance and immunity of an organism, eliminates in-vivo free radicals, resists radiation and has the effects of preventing and treating diseases, building the body, strengthening the body and prolonging the life; the invention has simple preparation method and is suitable for industrialized production.

The invention relates to a post-finishing process for ready-made clothes, which adopts the one-step method of one-bath in the following working procedures of desizing, unwatering, soaking in treatment fluid, re-drying, pressing and baking for setting, and cooling. In preparing the treatment fluid, resin 5-10%, OLEOPHOBOL 4-8%, penetrant 0.1-0.25%, and catalyst 1-2.5% are included. After finishing, the ready-made clothes with no ironing and washing for 30 times can achieve the crease shedding of level 4, water resistance of level 5, oil resistance of level 5, and soil resistance of level 5, thereby having excellent water-washing serviceability, durability and shrink resistance. The formaldehyde content is lower than 75ppm. The post-finishing process has the advantages of little pollution, obvious effects of water resistance, oil resistance, soil resistance, and no ironing, good durability and so on, thereby being applied to the ready-made clothes made of natural fibers such as cotton, hemp, tencel and so on.

The invention relates to an ultrahigh molecular weight polythene fiber surface modifying method, comprising: 1. placing ultrahigh molecular weight polythene fiber in organic iron sulfonate solution to soak for 15-60 min, where the organic iron sulfonate solution is iron trichloride solution with mass concentration of 18-60%, or one of the iron toluenesulfonate solution, ferric tri(dodecanesulfonate), iron 2-acylamido-2-demthyl-1-propanesulfonate, or iron morphine propanesulfonate solution with mass concentration of 5-40%, and the organic iron sulfonate solvent is normal butyl alchohol or water; 2. placing the soaked polythene fiber in vacuum device with vacuum of 650-730mmHg in the proportion of 100-120 ml of intrinsic conducting polymer monomer per kg of fiber to process at 25-85deg.C for 0.5-8 h, and making it, where the intrinsic condcuting polymer monomer is pyrrole or thiophene with purity not lower than 99%. And the method can effectively surface adhesiveness of ultrahigh molecular weight polythene (UHMWPE) fiber and besides, keep the original strength of UHMWPE and the process is simple.

The invention discloses bedding fabric with antibacterial and cool functions and a post-finishing process thereof. The bedding fabric is formed by weaving blended yarn with antibacterial and cool functions. The blended yarn with antibacterial and cool functions is formed by blending linen fiber, chitin fiber staple and polyester filament yarn according to sirofil spinning technology. In the blended yarn with antibacterial and cool functions, the linen fiber and the chitin fiber staple are both wrapped on the surface of the polyester filament yarn. The post-finishing process includes the following steps: desizing and scouring-singeing-bleaching repeatedly through chlorine oxygen-cellulase washing-dying-washing and gentle stretching-preshrinking-finished products. The fabric finished products has cool touch, excellent antibacterial performance and good crease resistance. Compared with pure linen fabric, the fabric is soft. Simultaneously compared with chitin fabric, the fabric has a certain body and is appropriate for bedding fabric in spring and summer.

The invention provides a textile product printing and dyeing method including: subjecting natural fibers to ionic modification; adding aluminum salt or ferric salt modifiers when the water temperature in a dyeing vat is 45-55 DEG C, increasing the temperature to 70-90 DEG C and holding; dyeing the modified natural fibers; and adding natural dye when the water temperature in the dyeing vat is 40-60 DEG C, regulating the pH (potential of hydrogen) to 3-10, increasing the temperature to 70-99 DEG C and holding. Textile products printed and dyed by the textile product printing and dyeing method are environment-friendly and uniform in dyeing without fading.

The invention discloses a textile dyeing and printing method, which comprises the steps of: placing natural fiber in a dye vat with a bath ratio of 3:7, raising the water temperature to 65-75DEG C, adding 5-10g/L ethyl triethoxysilane, 20-25g/L aluminum sulfate and 15-20g/L of ferrous sulfate, raising the temperature to 92-94DEG C, and conducting heat preservation for 1-2 hours to complete modification of natural fiber ions; putting the modified natural fiber into a dye vat with a bath ratio of 2:7, raising the water temperature to 50-55DEG C, adding 5g/L triethanolamine, 30g/L of a natural dye and 10g/L of a salt, adjusting the PH to 2-2.5, raising the temperature to 60-65DEG C at a rate of 15-20DEG C/min, and performing heat preservation for 3-4 hours, thus completing dyeing. The textile printed and dyed by the method provided by the invention has the advantages of environmental protection, uniform dyeing, and color fastness.

The invention relates to a hydrogel type alginate fiber film cloth, and also relates to a production method of the hydrogel type alginate fiber film cloth. The production method of the hydrogel type alginate fiber film cloth comprises the following steps: (1) preparing a sodium alginate spinning solution; (2) performing wet spinning on the spinning solution in a coagulation bath; (3) preparing anaqueous sodium alginate solution having a mass fraction of 20-30%; (4) immersing calcium alginate nascent fibers in the aqueous sodium alginate solution having the mass fraction of 20-30%; (5) squeezing out water, immersing the nascent fibers in an ethanol-water solution, and squeezing out water; (6) preparing a chitosan solution having a mass fraction of 2%; (7) immersing the hydrogel type seaweed fibers obtained in step (5) in the chitosan solution; and (8) squeezing out water, and performing dying and winding processes to obtain the hydrogel type alginate fiber film cloth. The hydrogel typealginate fiber film cloth has a high strength, can be rapidly aggregated when meeting water, and can be applied to the field of hydrogel masks.

The invention discloses an anti-ultraviolet swimsuit fabric. According to the formula, the swimsuit fabric consists of the following components: cotton fibers, chitin viscose fibers, polyvinyl alcohol fibers, nano bamboo charcoal fibers, spandex fibers, polyester drawn textured yarns and an anti-ultraviolet finishing agent. The swimsuit fabric, which is made in accordance with the formula, is good in elasticity, high in air permeability, antibacterial, radiation-resistant, soft, wear-resistant and acid and alkali-resistant, sweat-resistant, seawater-resistant, dry-cleaning resistant, smooth and anti-static; a swimsuit, which is made from the swimsuit fabric, is comfortable to wear, breathable, and is capable of killing bacteria and resisting ultraviolet rays; and meanwhile, the swimsuit is excellent in slimming and shaping performances.