766results about "Fibre treatment to obtain bast fibre" patented technology

The invention relates to a technological process of a ramie bast fiber, which comprises a basic degummed ramie production route: raw ramie skin-sorting and derooting-mechanical ungluing-cage loading-biological ungluing-high-temperature rinsing-cage unloading-sub-fiber washing-soft rinsing-radio frequency drying- degummed ramie. Long ramie can be growth through the mechanical hemp oiling- infiltration and health care-stretch breaking and carding-pre-gilling-combing and sorting-final gilling of the degummed ramie. Short ramie can be produced through the combing and the sorting of combed noil. Oakum can be produced through biological ungluing-high-temperature stewing and ungluing-high-temperature rinsing-cage unloading-sub-fiber washing-soft rinsing-dehydration and drying-radio frequency drying-mechanical hemp oiling- infiltration and health care-opening and edulcoration- combing and sorting. Improving methods are adopted for the mechanical ungluing, biological ungluing, high-temperature rinsing, sub-fiber washing, stretch breaking and carding, combing and sorting and the like. The preparation process has the advantages of short process, high production efficiency, high mechanical automation degree, stable product quality, excellent fiber quality and strong operability of fiber length and fineness, and can be used in the production processes of various bast fiber raw material, gramineae fiber raw material, leaf fiber raw material and other fibers.

The present invention uses clustered bamboo as raw material and is aimed at providing a kind of raw material for making shell fabric instead of cotton, chemical fibre, hemp and silk, and its production method incldues the procedures of bamboo fibre pretreatment, bamboo fibre decomposition, bamboo forming and its after treatment, in which it adopts a degumming softening agent made up according to a natural formula, it is neutral in acidity-alkalinity and has no environmental pollution. Said shell fabric made of bamboo fibre is good in flexibility and permeability and is uvioresistant.

The present invention generally relates to a process for the extraction and preparation of bast fibers with high quality and high counts. The process is suitable for ramie, hemp and flax. The present invention also relates to bast fibers with high counts produced according to the process, as well as pure yarns and mixed, blended yarns made from said bast fibers.

The invention provides a technology for preparing bamboo fiber by 1, 4-butanediol in a solvent method, which comprises the steps of preparing bamboo into bamboo filaments; soaking the bamboo filaments in the solvent and heating to remove lignin, hemicellulose and other impurities on the surface of the cellulose; preparing into coarse bamboo fibre; beating the coarse bamboo fibre, washing with water simultaneously, and then spin-drying through a centrifuge; bleaching and cleaning; conducting mellowing to the bamboo fiber; soft-impressing the bamboo fiber; stowing fermentation and curing, and finally obtaining the bamboo fiber with spinnability after opening and carding. The solvent adopted by the invention has high boiling point and stable chemical property and can be recycled; the whole technological process does not generate black liquor and seriously pollute the environment, and belongs to clean techniques; the obtained natural bamboo fiber has the remarkable advantages of moisture absorption, quick dry, coolness, comfort, antibacterium, deodorization and the like; and the method has low cost and good economic benefit and environmental protection benefit.

A method of extracting hemp fibers from decorticated hemp bast skin involves pre-treating the decorticated hemp bast skin with an aqueous solution containing di-sodium citrate, tri-sodium citrate or a mixture thereof having a pH of from about 6-13 at temperature of about 90° C. or less; and subsequently treating recovered fiber with a enzyme. Determining the extent of completion of a plant fiber degumming process involves treating degummed fiber with a recombinant pectinase expressed in an organism that produces neither cellulose nor xylanase, to release reducing sugar from any residua pectin on the degummed fiber, and, quantifying the released reducing sugar.

The invention provides a method for improving the physical and mechanical properties of oxidation-degummed ramie. The method comprises the following steps of: preparing a degumming solution by using caustic soda, an oxidant, a surfactant, a fiber expanding agent, an oxidant stabilizer and water; mixing raw ramie and the degumming solution, heating, and boiling off to sufficiently remove colloid; and then cooling, adding a reduction softener, maintaining the temperature, oiling and drying after washing with clear water, and opening and carding to obtain textile ramie fiber subjected to reduction modification. According to the method disclosed by the invention, the defects of the prior art are overcome; and the reduction softener is added to raffinate obtained after oxidation-degumming, oxycellulose produced in the degumming process is reduced and softened, so that the physical and mechanical properties, such as strength, length, elongation and softness of the fiber are improved, the working procedures are simplified, and pollution and environmental pressure are lightened.

The method for preparing sisal fiber is characterized in that the method comprises the following steps: (1) scraping colloid in sisal leaf pulp by mechanical knocking or rolling, and removing partial lignin, hemicellulose and pectin therein; (2) pre-soaking fiber material in sulfuric solution at 30 to 80 DEG C for 1 to 3 h; (3) cleaning with circulating water to adjust pH value to 6.8 to 7.2; (4) adding the fiber material in a boiler with pressure of 0.1 to 0.2 MPa, and boiling with sodium hydroxide solution for 2 to 6 h; (5) cleaning with circulating water to adjust pH value to 6.8 to 7.2; and (6) post-treating to obtain sisal fiber. The method has the advantages that the fineness and the flexibility of sisal fiber prepared by the method are improved greatly in comparison with unprocessed crude sisal.

A yarn comprising natural bamboo fiber and the method for producing the same is disclosed, wherein said yarn is prepared by spinning natural bamboo fibers alone or in combination with other fibers in a blended ratio of natural bamboo fibers comprising 30 to 100% by weight and other fibers comprising 70 to 0% by weight.

A method of extracting fibers from decorticated plant bast skin involves pre-treating decorticated plant bast skin of a fiber plant with an aqueous solution containing trisodium citrate having a pH in a range of about 8-14 at a temperature of about 90° C. or less; and subsequently treating recovered fibers with a protease at alkaline pH.

The invention provides a degumming process for a kudzu vine. Directed at the problems of a great usage amount of chemicals, a high fiber strength damage rate, severe environmental pollution and the like in conventional chemical degumming process, the invention provides a degumming method for the kudzu vine through low temperature refrigeration and vacuum technology. The process comprises the following steps: changing the interior structure of a raw kudzu vine by using low temperature vacuum technology so as to form considerable micropores, thereby increasing the surface area of a fiber; and then fully injecting dilute alkali lye and a low-concentration hydrogen peroxide solution into the interior of the fiber by using vacuum negative pressure technology so as to allow alkali lye and hydrogen peroxide to exert maximum efficacy. The process provided by the invention substantially reduces the usage amount of chemicals, shortens degumming flow and has a high gum and lignin removal rate and a low fiber damage rate.