55results about How to "Initial modulus reduction" patented technology

The invention provides a low-temperature softening treatment method for jute fibers. The low-temperature softening treatment method for jute fibers is characterized by concretely comprising the following steps: prewashing jute fibers to remove surface impurities, performing one to ten times of softening treatment, and drying to obtain softened jute fibers; wherein softening treatment comprises the following steps: infiltrating the jute fibers in a softening treatment fluid or spraying the softening treatment fluid onto the jute fibers, wherein the softening treatment fluid contains alkali and urea or thiourea; and treating for 10s-3h at 5DEG C to -195DEG C under low-temperature state, and taking out and washing the jute fibers. The treatment method is simple, high-efficiency and clean, the treated jute fibers are low in crystallinity, low in rigidity, and soft in hand feeling, and the prepared fabric is not itchy; and the fibers have low crystallinity, the surfaces of the fibers have partial holes and grooves, and the dyeing performance and hygroscopic property of the fibers can be obviously improved.

The invention discloses a yarn guiding device for textile product production. The device comprises a fixing bottom plate, a guiding assembly, a burr removing assembly and an adjusting assembly, the burr removing assembly comprises a guiding tube, a heating sleeve tube and a supporting frame, the heating sleeve tube is sleeved with the guiding wire, a heating wire is arranged in the heating tube, the adjusting assembly comprises a fixing plate, an adjusting plate and a pressurizing screw rod, the fixing plate is located on the limiting frame, a tensioning roller is arranged below the bottom ofthe adjusting plate, and the pressurizing screw rod is sleeved with the limiting plate. According to the yarn guiding device, yarns can be welled guided to prevent the yarns from breaking in the conveying process, the adjustment of the angle of the yarns can be conducted according to the conveying angle of the yarns, the using range of the guiding device is expanded, burrs, impurities and the likeon the yarns are removed through the burr removing mechanism to improve the quality of the yarns, and tensioning force in the yarn conveying process can be conducted by the adjusting assembly according to the conveying demands of the yarns to help the conveying of the yarns.

The invention relates to a downwards-pressing pressing piece device for smooth and clean spinning. A pressing piece assembly is composed of a shell, a heating piece and a heater, wherein the shell comprises a connecting end and a heating part, the heating part is arranged at one side of the upper end of the connecting end and is formed integrally, an opening is formed in the front end of the heating part, the heating piece is fixed to the opening of the heating part of the shell, and the heater is fixed in the heating part of the shell. A power control assembly comprises an installing base, an installing groove and a circuit control panel, and the circuit control panel is closely installed in the installing groove through the installing base. A supporting base comprises a connecting piece and an inserting groove which are formed integrally, a certain included angle is formed between the connecting piece and the side face of the inserting groove, and vertical oblong holes are formed in the connecting piece; a connecting section is of a V-shaped structure, and the included angle between the two planes at the inner side of the V-shaped structure is equal to that formed between the connecting piece and the side face of the inserting groove. The rigidity of fibers is reduced, harmful hairiness is reduced, and resultant yarn quality is improved.

The invention provides a Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength. The alloy comprises the following chemical components in percentage by weight: 15-35% of niobium, 1-8% of molybdenum, 1-8% of stannum and 0-1.2% of titanium dioxide powder. The Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength has the beneficial effects that the systemic alloy has good cold machining performance and a low machining cementation index and can coldly deform in a large scale by using cold machining processes such as cold rolling, cold wire drawing and the like; the systemic alloy has the characteristic of nonlinear deformation after being thermally machined or coldly machined and has large restorable elastic strain, low initial modulus and average modulus and high strength; the systemic alloy has low elastic modulus, high yield strength and breaking strength and high linear elasticity after being smelted, thermally machined or coldly machined and thermally treated; and the systemic alloy can be used for preparing medical equipment, physical training equipment and industrial equipment, and can be used for biomedical applications such as artificial bones, bone joints, implanted tooth roots, bony plates and the like.

The invention provides a polyamide monofilament, and a production method and an application thereof. A raw material for producing the polyamide monofilament comprises polyamide resin, and the polyamide resin is produced from 1,5-pentamethylenediamine and aliphatic long-carbon chain diacid. The production method of the polyamide monofilament is characterized in that polyamide monofilament is obtained through spinnereting, cooling molding, drawing and winding setting of dried polyamide resin. The raw material for producing the polyamide monofilament contains a monomer with the carbon number being an odd number, so a hydrogen bond proportion formed among molecules of an amido group, the crystal form and molecular chain space arrangement are different from those of conventional polyamide monofilaments produced from a monomer with the carbon number being an odd number; and the polyamide monofilament provided by the invention has a lower initial modulus and a higher bending resilience than the conventional polyamide monofilaments, and can be used to produce super soft filament and prolong the service life of the super soft filaments.

The invention relates to low-color-difference polyester HOY (high oriented yarn) fibers and a preparation method thereof. The low-color-difference polyester HOY fibers are prepared from spun polyester yarn, and the breaking strength of the polyester HOY fibers with high dye uptake is larger than or equal to 3.0 cN/dtex; the elongation at break is 50.0% plus or minus 4.0%, and the color difference delta E is smaller than 0.200. Ethylene glycol magnesium is relatively mild, the thermal degradation coefficient is small, fewer side reactions are caused in the reaction process, and generation of oligomers is reduced in the processing process; the mass percentage of oligomers is smaller than 0.5%, and the mass percentage of diethylene glycol is smaller than 0.5%; the oligomers are reduced in the polymerization process and further reduced in the dissolving process, accordingly, the quantity of the oligomers transferred from the inside of the fibers to the outside of the fibers is reduced in the processes of polyester fiber dyeing and post-processing thermal setting, colored patches and streaks are reduced, and the fiber leveling property and the rubbing fastness are guaranteed. The HOY fibers have lower crystallinity, the breaking elongation is larger and the initial modulus of the fibers is smaller, so that the fibers have good flexibility.

A technology for producing cationic sliver includes vacuum drying CDP chips with 0.23-0.3% of SIPM content which controlling the precrystallizing temp and time, screw smelting and spinning, cooling while winding to obtain primary fibres (7-17 dtex), bundling, oil-bath drafting, two-pass steam stretching, curling while finishing oil, thermal shape fixation, making ribbons (88 mm in average length), carding, and making sliver. Its advantages are soft handle, high antistatic nature, and high dyeability.

The invention relates to a novel three-dimensional orthogonal woven hybrid puncture-proof clothes which is a mixture of ultra-high molecular weight polyethylene (UHMWPE) fiber and Kevlar fiber and is formed by interweaving in a three-dimensional orthogonal structure. Compared with the traditional puncture-proof clothes, the novel three-dimensional orthogonal woven hybrid puncture-proof clothes is interleaved from the mixture of UHMWPE fiber and Kevlar fiber, and thus the excellent puncture-proof performance and wearability of the material are ensured; and meanwhile, as a three-dimensional orthogonal weaving processing method, the material weight is greatly reduced, and the production cost of the material is lowered. The development of the three-dimensional orthogonal woven hybrid puncture-proof clothes lays foundation for the development of clothes toward light weight, low cost and flexibility.

The invention relates to an elastic polyester fiber with a low melting point and a preparation method of the elastic polyester fiber. After elastic polyester is prepared by using phthalic acid (terephthalic acid and isophthalic acid), glycol, polytetrahydrofuran, a glass-transition temperature modifier (M-phthalate sulfonate) and a macromolecular modulus modifier (aliphatic ester or long-chain diol of which the number of carbon atoms is more than or equal to 5) as main reaction raw materials, the elastic polyester fibers with the low melting point is prepared by spinning, and when in spinning,the material of metal sand in a spinning component is Ni. The prepared elastic polyester fibers with the low melting point are made of elastic polyester, and molecular chains of the elastic polyesterare composed of phthalic acid chain segments, glycol chain segments, polytetrahydrofuran chain segments, glass-transition temperature modifier chain segments and macromolecular modulus modifier chainsegments; and the total content of acetaldehyde and butenal in the elastic polyester fibers with the low melting point is less than 0.5ppm. According to the elastic polyester fiber with the low melting point and the preparation method of the elastic polyester fiber, occurrence of an adhesion phenomenon can be avoided while fiber softness is improved, and the content of aldehyde compounds in the fiber is reduced.

The invention relates to a preparing method of a polyester fiber, and discloses a preparing method of a normal-temperature normal-pressure deeply-dyeable polyester filament. The problems that due to the limitation of a preparing method, the dyeing temperature of a polyester fiber is high, the requirement of high-temperature dyeing for equipment is high, energy consumption is high, and production cost is improved are solved. According to the technical scheme, the method is characterized in that raw materials include polyester, a third monomer and a fourth monomer, the third monomer is one of sodium dimethyl isophthalate sulfonate, diethyl isophthalate sulfonate and diethylene glycol isophthalate sulfonate, and the fourth monomer is fatty binary acid or polyether. The aims of dyeing the polyester filament at normal temperature and normal pressure and being good in dyeing effect, small in energy consumption in the dyeing process and low in cost are achieved.

The invention discloses FDY/POY different shrinkage combined filament yarn of biomass nylon 56 fiber/PET fiber.The combined filament yarn is characterized by being prepared by spinning biomass nylon 56 fiber slices and PET slices; the biomass nylon 56 fiber is FDY fiber and the PET fiber is POY fiber, or the biomass nylon 56 fiber is POY fiber, and the PET fiber is FDY fiber.The difference between the boiling water shrinkage of the biomass nylon 56 fiber and that of the PET fiber is equal to or larger than 30%.According to the obtained FDY/POY different shrinkage combined filament yarn of the biomass nylon 56 fiber/PET fiber, the surfaces of tows curl slightly and naturally, hydrophily and softening property of the tows are obviously improved, and the FDY/POY different shrinkage combined filament yarn can be used for developing imitated cotton and imitated silk fabric.

The invention discloses a paper diaper and a preparation method thereof, and relates to the technical field of disposable sanitary products. PTT (polytrimethylene terephthalate) fibers and PTT/PET (polyethylene terephthalate) two-component fibers are selected, opening, carding and spunlace fixing processes are adjusted, special shrinkage and folding processes are selected, a prepared elastic non-woven fabric has excellent elasticity, further has good softness and breathability of a spunlace non-woven fabric and has better safety, and the elastic non-woven fabric is arranged at an elastic backposition of the paper diaper. Compared with a traditional paper diaper, the paper diaper has the advantages that a rubber band is omitted, and the prepared paper diaper applies more uniform elastic force to the body of an infant, so that the paper diaper has better conformity and helps good development of the hip of the infant to a certain degree.

The invention provides a direct spinning system for mixed melt of bamboo charcoal and polylactic acid, comprising a polymerization framework and a spinning box body, wherein a stirring tank, a primary polymerization tank and a final polymerization tank are arranged on the polymerization framework in turn from top to bottom, the bottom of the stirring tank is in connection with the top of the primary polymerization tank through a first material conveying pipe, a first automatic control valve and a first metering pump are arranged on the first material conveying pipe, the bottom of the primary polymerization tank is in connection with the top of the final polymerization tank through a second material conveying pipe, a second automatic control valve and a second metering pump are arranged on the second material conveying pipe, a third material conveying pipe is connected to the bottom of the final polymerization tank, a third metering pump, a filtering and impurity removing device and a dynamic/static integrated pipeline type material mixing device are arranged on the third material conveying pipe in turn in a melt flowing direction, and a spinning metering pump and a spinning component are arranged in the spinning box body. According to the direct spinning system for the mixed melt of the bamboo charcoal and the polylactic acid provided by the invention, nanoscale bamboo fragrance charcoal micro powder is employed to modify the polylactic acid, and therefore fiber which is prepared from the modified polylactic acid has the advantages of reduced initial modulus, rising moisture regain, increased wear resistance and obviously improved air permeability and hand feeling.

The invention discloses a production method of fabric for a gas bag, which comprises the step of weaving. In the fabric weaving process, a presser bar is additionally arranged below lamella warp between the heald frame of a weaving machine and the back beam of the weaving machine. The fabric obtained by the invention has no need of after-treatment and has good flexibility, low gas permeability and high slip resistance.

The present invention relates to a novel tire cord fabric or strip made of alternating PET and nylon 6.6 warp cords which is used as tire reinforcement. Such a novel tire cord fabric or strips improve high speed durability, tread separation resistance and impact resistance when used as zero degree spirally wound cap ply in pneumatic radial tires.

The present invention relates to a novel tire cord fabric or strip made of alternating nylon cords having different constructions. Such a novel cord fabrics or strips improves high speed durability and tread separation resistance when used as zero degree spirally wound cap ply on the belt package in pneumatic radial tires.

The invention discloses a low-cost bio-based composite fiber as well as a preparation method and application thereof. The composite fiber comprises a core layer and a skin layer wrapping the core layer, the core layer is made of nylon 56, the skin layer is made of nylon 66, and in the cross section of the composite fiber, the ratio of the cross section area of the core layer to the cross section area of the skin layer is (20-80): (20-80). The preparation method comprises the following steps: respectively preparing nylon 66 slices and nylon 56 slices; the nylon 66 slices and the nylon 56 slices are subjected to melt extrusion composite spinning, so that the nylon 56 forms a core layer, the nylon 66 forms a skin layer, and the low-cost bio-based composite fiber is obtained. The mechanical property of the composite fiber is equivalent to that of nylon 66 fiber, the flexibility is better, the production cost is low, and the composite fiber can meet some low-cost nylon 66 fiber application occasions, such as the fields of automobile safety airbags, nylon industrial yarns and the like; and the fiber also belongs to bio-based composite fiber, and accords with the current low-carbon and environment-friendly development trend.