2655 results about "Viscose" patented technology

The invention relates to a graphene blend regenerated cellulose fiber. The graphene blend regenerated cellulose fiber is prepared by mixing an oxidized graphene solution and a regenerated cellulose solution, molding a mixture through a viscose wet spinning process and reducing the mixture; the dry breaking strength of the graphene blend regenerated cellulose fiber is not less than 1.8 cN/dtex, the wet breaking strength of the graphene blend regenerated cellulose fiber is not less than 0.9 cN/dtex, the dry breaking elongation of the graphene blend regenerated cellulose fiber is not less than 16%, the mass specific resistance of the fiber is 1-9X106 omega.g/cm2, and the thermal decomposition temperature of the fiber is not lower than 400 DEG C; and with the regenerated cellulose fiber as a matrix, the prepared graphene blend regenerated cellulose fiber has the advantages of good moisture absorption, good air permeability, soft handle and good dyeing performance and has the characteristics of ultrahigh strength, thermal conductivity, electric conductivity, antibacterial property and the like of the graphene; the conductive and thermal properties of the fiber are both improved by being compared with those of the traditional regenerated cellulose fiber; the antibacterial property of the fiber is additionally provided; and the graphene blend regenerated cellulose fiber provided by the invention has the advantages of simple production process, easiness in operation, and higher yield. People estimate that the developed graphene blend regenerated cellulose fiber can be widely applied to the field of costumes, industrial textiles and the like.

The invention provides multifunctional viscose. The multifunctional viscose comprises viscose, graphene and nano-silver, wherein nano-silver is loaded to a graphene slice layer in situ. The invention further provides a preparation method of the multifunctional viscose. The preparation method is characterized by comprising the following steps: (a) dispersing graphene in a water solution, so as to obtain a graphene dispersion liquid; (b) dissolving silver salt into the graphene dispersion liquid, adding a reducing agent, and carrying out reduction reaction, so as to obtain nano-silver-loaded graphene dispersion liquid; and (c) uniformly mixing the nano-silver-loaded graphene dispersion liquid with viscose liquid, and carrying out spinning, so as to obtain the multifunctional viscose. An experimental result shows that compared with viscose which is not added with nano-silver-loaded graphene, the multifunctional viscose has the advantages that the far infrared temperature increase performance is increased by not less than 100%, the ultraviolet protecting coefficient is increased by not less than 70%, and the antibacterial activity reaches 99.9% and is increased by not less than 100%.

The invention relates to a fabric capable of preventing electromagnetic radiation, which is knitted or weaved. The warp and the abb of the fabric comprise covering yarn. The covering yarn takes one of silver plating fiber, carbon fiber and carbon black organic fiber as core yarn and takes comfortable fiber as skin yarn; the silver plating fiber is formed by carrying out silver plating on synthetic fiber; the weight ratio of the corn yarn to the skin yarn is 10-70:30-90; and the comfortable fiber is one of cotton, wool, silk, hemp, viscose, bamboo fiber, bamboo carbon fiber, soybean fiber, PLA fiber, alginate fibre, milk fiber and pearl fiber. The invention can shield electromagnetic wave, and the shield effect is above 99%. The skin yarn in the covering yarn adopts natural fiber, and the natural fiber on the outer layer has the characteristics of moisture absorption, ventilation and comfort.

The present invention relates to a process for the production of xylose and dissolving pulp from xylan-containing biomass, such as hardwood. The invention is based on prehydrolysis of the xylan-containing biomass with SO₂ in specified conditions, followed by chromatographic fractionation, nanofiltration or precipitation crystallization of the xylose-containing prehydrolyzate to obtain a xylose product having a xylose content of at least 55% on DS. The dissolving pulp obtained from the process can be used for example for the production of viscose.

The invention discloses a flame-retardant covering yarn fabric and application thereof. The product is made from covering yarns, wherein the covering yarns are subjected to the processing of flame-retardant after finishing; the core yarns of the covering yarns are polyester, nylon, spandex, vinylon, polyethylene or composite yarns thereof; and the cladding material of the covering yarns are cotton fibers, viscose fibers or composite fiber materials thereof. The flame-retardant covering yarn fabric can be applied to the manufacturing of protective clothing, military clothing or military coverlets. The flame-retardant covering yarn fabric provided by the invention can keep higher physical mechanical strength and has a flame-retardant effect.

The invention relates to the technical field of papermaking methods, especially to a production method of a kraft cardboard with an ultra low gram weight. The method comprises the following technological steps of: conducting batching; adding water for disintegrating so as to obtain a slurry; carrying out combined purification treatment to the slurry; performing moderate concentration beating; adding a chemical system into the combined slurry; papermaking; molding filtration water for papermaking; implementing two-stage squeezing dewatering; conducting primary baking for drying; carrying out sizing; performing further baking for drying; implementing calendering; and conducting coiling. The invention effectively solves the problems of low grade, poor strength, high pollution load of discharged sewage, large gram weight, incomplete treatment to viscose materials and hot melt materials in waste paper, large process investment and other problems in existing kraft cardboards. The production method of a kraft cardboard with an ultra low gram weight in the invention makes use of a combined technology of pulping and papermaking, and fully utilizes secondary fibers to prepare a kraft cardboard with an ultra low gram weight through papermaking, so that the fiber consumption is reduced. And the prepared kraft cardboard has high strength and a gram weight of 90g/m<2>. The method provided in the invention has high vehicle operation speed, reduces production cost and energy consumption, decreases pollutant discharge, and enhances economic benefits.

The invention discloses a manufacturing technique of bamboo dissolving pulp. The manufacturing technique sequentially comprises cropping, screening and removing ashes, washing under standard temperature, sulfate cooking, serosity separation, scrubbing purification, chlorination treatment, alkali treatment, acetic acid bleaching +H₂O₂ oxidation organic bleaching, acid complex treatment and runnability. The invention effectively shortens the production process and enhances production efficiency of producing bamboo dissolving pulp by bamboo. The dissolving pulp can be used in rayon dissolving pulp, nitrocellulose dissolving pulp, cellulose acetate dissolving pulp and cellulose dissolving pulp. At the same time, the invention enhances the harvesting rate of making bamboo dissolving pulp by bamboo.

The invention relates to blended yarn which contains wool, pearl fiber, modal fibre and viscose, and a machining method thereof. The blended yarn is composed of wool, pearl fiber, modal fibre and viscose with the mass ratio as the following: wool 10-15%, pearl fiber 20-30%, modal fibre 30-35% and viscose 25-30%. The blended yarn can be in pure white, bleached to be white, gray, apricot, pinkish purple, or in other colors. The performance index meets the requirements that the single yarn rupture strength is 12.5-19.5cN/tex, the CV value of single yarn rupture strength is less than or equal to 6.0% and the CV value of yarn evenness variation coefficient is less than or equal to 15%. The processing method includes the following steps: dyeing according to the tinctorial pattern of a matching card (used for producing colored yarn), manually mixing the cotton and baling; grabbing the cotton through a disc, blending and opening the cotton, opening the cotton through carding pins, feeding cotton in the vibrating mode, single beater scutching, combing the cotton, drawing, roving, spinning, winding and packing.

The invention discloses a manufacturing method for filament non-woven fabric. The manufacturing method for the filament non-woven fabric comprises the following technological steps that (1) a creel is used for unwinding filament fibers, wherein the filament fibers comprise polyphenylene sulfide fibers, aramid fibers, Teflon fibers, viscose fibers, polyimide fibers or polyacrylonitrile fibers, carbon fibers, and glass fibers or basalt fibers, and the filament fibers are zero-twist continuous filaments, and the fineness of the filament fibers is 1micron to 200 microns; (2) ultrasonic waves are used for washing the filament fibers; (3) sigle-fiber drying devices are used for drying the filament fibers; (4) the filament fibers are fed into a tubular drafting device to carry out drafting acceleration through speed adjusting rollers and tensioners, and the filament fibers are evenly dispersed through silk placement devices, and are laid on a net forming curtain to form a filament fiber net; (5) the filament fiber net is manufactured into the filament non-woven fabric through a needled processing method of the non-woven fabric or a spunlace processing method of the non-woven fabric or a hot-rolling processing method of the non-woven fabric.

The invention relates to a wrapping cloth V belt and a manufacture method of the wrapping cloth V belt and belongs to the technical field of mechanical transmission devices and materials. The wrapping cloth V belt comprises a core layer and a wrapping cloth layer covered on the outer surface of the core layer. The core layer sequentially comprises a base glue layer made of fiber glue pieces, a viscose layer, a polyester hard line rope and a buffering glue layer from bottom to top. The fiber glue pieces comprise natural rubber, butadiene styrene rubber, chloroprene rubber, reclaimed rubber, anti-aging agents, stearic acid, magnesium oxide, carbon black, softening agents, short fibers, zinc oxide, padding, and accelerating agents. The fiber glue pieces manufactured by mixed refining undergo horizontal cutting and splicing, and therefore short fibers in the fiber glue pieces are horizontally arranged. The finished wrapping cloth V belt is obtained through treatment of forming, cutting, cloth wrapping, vulcanization and demolding. Components in the rubber pieces are reasonable in ratio, and the wrapping cloth V belt has the advantages of being high in intensity, not prone to horizontal deformation, and long in service life. The manufacture method of the wrapping cloth V belt is simple in technology and easy to operate.