39results about How to "Lower spinning temperature" patented technology

The process of preparing PDT copolyester fiber includes the following steps: 1. saccharifying and catalytically hydrogenating corn starch to prepare sorbitol, catalytically hydrogenating to prepare multicomponent mixed alcohol, and fractionating in a fractionating tower at 182-212 deg.c to obtain corn-base ethylene glycol product of 89-99 % content and with ethylene glycol as main component and other diols; 2. detecting the contents of component diols in the ethylene glycol product and adding insufficient components for content fluctuation controlled within 10-30 %; and 3. adding nanometer titania in 0.05-1 wt% into the corn-base ethylene glycol product, and copolymerizing together with terephthalic acid at 280-288 deg.c for 5-7 hr to prepare PDT copolyester. The process is suitable for industrial production.

The invention relates to a hollow fiber membrane and a manufacturing method thereof. The weight percentage prescription of the membrane forming system of the membrane is: 25 to 45 percent of polyurethane; 35 to 60 percent of compound pore-forming agent; 15 to 20 percent of organic low molecular; the sum of each component is 100 percent; wherein, the polyurethane is a fiber grade; the weight ratio of a hard section and a soft section is 1/1 to 1/5; the compound pore-forming agent is the mixture of an interface cavity pore-forming agent and a non-interface cavity pore-forming agent; the organic low molecular liquid is a good water-soluble polyurethane solvent with a high boiling point; the manufacturing method of the membrane adopts the following melt spinning technique: firstly the prescription of the invention demands the preparation of a polymer membrane forming system; then the polymer membrane forming system is poured into a mixing tank to carry out heating, reinforcing and pre-mixing with a heating temperature of 130 to 140 DEG C; the polymer membrane forming system is injected into a double screw extruder after being uniformly mixed; melt blending spinning is carried out to manufacture the membrane under the temperature of 130 to 155 DEG C; then the hollow fiber membrane is obtained after the normal working procedure of water extraction washing.

The invention provides a modified polyphenylene sulfide fiber and process for preparing, whose components and parts by weight comprise 100 parts of polyphenylene sulfide and 0.2-2 parts of nano-silica whose surface is treated, the particle size of the silica is 20-60 nanometer, and the denier of the fiber is 85-91 dtax. The invention prepares the polyphenylene sulfide fiber through modifying polyphenylene sulfide resins and using special spinning process, the fiber strength and tension toughness are all improved, simultaneously, the glossiness of the fiber is further improved, the spinning is capable of being done by a common spinning device, the cost of spinning is reduced, the fluidity of substrate is changed better during spinning, the temperature of spinning is reduced by 5-10 DGE C, the draft multiple of as-spun fiber is improved, and the mechanical properties of the fiber are capable of being improved.

The present invention discloses a technology field relating to the preparation method of textile materials, especially to a process for for low temperature production of nylon fibre. Said process comprises the steps of adding a mixture of metallic compounds during or before nylon melting course and then spinning the obtained molten mass at a low temperature of 160-250 DEG C. Adding auxiliaries of oxidation preventives, ultraviolet absorbents, light-stability agents and anstatic agents therein before the melting course or during the melting course will result in more excellent effects. The method has a lower energy consumption and a lower cost, and its industry operations are more convenient and safe, will find wide use in industries such as garments and intertexture.

The invention provides a flame retardant nylon composition, wherein the flame retardant nylon composition includes PA6 and pentaerythritol phosphonate. The nylon composition has the advantages of goodspinnability, flame retardancy, fluidity and rheology, and can reduce the spinning temperature and increase the spinning speed.

The invention relates to an imitated nylon differential fiber of dyeable polypropylene fiber for dyeing, which comprises: 80 to 90 percent of polypropylene, 9 to 11 percent of dyeable master batch, 0.3 to 0.7 percent of cooling auxiliary agent and 4.0 to 5.0 percent of polyethylene. The fiber has the advantages that: firstly, the polypropylene fiber has the flexibility, tensile property and elasticity as nylon through modifying the polypropylene fiber; and secondly, the dyeability of the modified polypropylene fiber is realized.

The invention relates to a medical fibre and a manufacturing method thereof. The medical fibre has characteristics in composition by weight percent: 59.99-89.9% glutin with average molecular weight 10-20 ten thousands; 1-5% sericin with average molecular weight 1000-40000; 9-35% fibroin with average molecular weight 80-4000; 0.01-0.1% cross linker that is 1-ethide-3, 3-dimethyl aminopropyl-carbodiimide and/or N-hydroxide radical succimide. The method includes steps as follows: placing glutin, sericin and fibroin into distilled water according with weight percent composition, swelling 150-200 miniutes under 70-95 DEG. C for preparing spinning stock solution, reducing temperature to 35-45 DEG. C after filtering and deaeration, adding cross linker and mixing; using centrifugal spinning technique for spinning, drying and forming the obtained fibre rapidly, then placing into a vacuum baking oven for baking further, collecting, packaging, irradiating sterilizing by cobalt 60 gamma, and obtaining the medical fibre.

The invention discloses a novel PP ultrathin thermal insulation shell fabric and a production method thereof. The production method comprises the steps that firstly, 75D or 8.3tex ultrafine-denier PP and novel 42D XLA comfortable and elastic fibers are interwoven; secondly, shaping and longitudinal and transverse drawing are performed at the temperature between 120 DEG C and 130 DEG C; thirdly, the dyeing and finishing process is performed; fourthly, processing and aftertreatment are performed. The shell fabric produced through the method is high in dimensional stability and heat loss and light and thin in texture, has the functions of keeping warm, being breathable, carrying anions and so on, is light and thin, soft in handfeel, good in fluffing and pilling resistance and light, attractive and comfortable to wear, can free people from past bloat in winter and achieves perfect combination of science and technology, fashion and functions, and the shrinkage rate is less than 2%.

The invention provides a polyester fiber and a preparation method thereof. The polyester fiber is characterized by containing polyester and amino terminated polyether, wherein the content of the amino terminated polyether is 0.1-10% of the polyester mass. The polyester fiber has the advantages of high intrinsic viscosity, high fiber strength, excellent color and luster, low costs and the like. The preparation method of the polyester fiber has the advantages that a process is simple, spinning temperature is low, the intrinsic viscosity change of resin is small before and after spinning, and the like.