Jiangsu Hengli Chemical Fibre Co., Ltd.

Hongwei Fan

Lili Wang

Fangming Tang

Shanshui Wang

Lixin Yin

Damao Yang

Wengang Li

Zangzang Niu

Guanfan Jin

Huirong Zhao

Jiangen Shen

Ming Chen

Guangkun Song

Chaoming Yang

Yiwei Shao

Zhujun Ding

Xiaohua Sun

Xiaoyu Wang

Ye Zhang

Qianhan Liu

Xiaobing Fan

Yongfeng Wang

Xiangming Wang

Yanfang Wang

Zhili Liu

Huailin Ren

Zhengping Yuan

A method for preparing black cotton-like fibers is provided, using a DTY texturing process, wherein POY and FDY fibers containing carbon black are sequentially passed through a first yarn guide, a yarn guide roller, a tensioner, a first yarn feeding roller, pre-entangling, a second yarn feeding roller, a first deformation hot box, a cooling plate, a false twister, a third yarn feeding roller, a middle entangling device, a setting hot box, a setting yarn feeding roller, oiling, and winding to obtain a black cotton-like fiber; the first yarn guide is a yarn guide wheel; a tow contacts a groove bottom of the first yarn guide in the process of movement, driving the first yarn guide to rotate; and the tensioner is a magnetic tensioner.

Method for preparing black fibers

A recycled polyester filament and preparation method therefor are disclosed. In the process of preparing a fiber from a recycled polyester according to the FDY process, the ring-blowing is used for cooling, and the distribution of spinneret holes on the spinneret is controlled to meet certain conditions, then the recycled polyester filament is obtained by relaxation heat treatment after a fully drawn yarn is produced. The spinneret holes are C-shaped spinneret holes and circular spinneret holes, the cross-section of the C-shaped spinneret hole is composed of an outer arc, an inner arc, and two line segments, and two endpoints of the outer arc are A and B respectively; wherein the certain conditions include: all the spinneret holes are distributed in concentric circles, and the C-shaped spinneret holes are located on the outermost circle, rotating at different angles and randomly distributed.

Recycled polyester filament and preparation method therefor

A preparation method of self-crimping elastic combined filament yarns for knitting is disclosed, wherein the combined filament yarns are extruded from the same spinneret; a first fiber-forming polymer melt is divided into two ways, one is directly extruded after distribution; and the other is extruded after distribution by side-by-side composite spinning together with a second fiber-forming polymer melt; the first fiber-forming polymer and the second fiber-forming polymer are compatible or partially compatible; on the same spinneret, a ratio of the number of spinneret holes m for direct extrusion to the number of spinneret holes n for extrusion after distribution by side-by-side composite spinning is 1:(5-10); the self-crimping elastic combined filament yarns for knitting are prepared according to specific spinning processes, wherein the combined filament yarn mainly comprises a first fiber-forming polymer monofilament and a first/second fiber-forming polymer side-by-side composite monofilament; wherein the monofilament crimping directions are randomly distributed.

Preparation method of self-crimping elastic combined filament yarn for knitting

A degradable polyester fiber and its preparation method are disclosed. The preparation method is to cool a PET melt dispersing with doped ZrOpowder by ring-blowing after extruded from a trilobal spinneret hole on a spinneret, and manufacture a fully drawn yarn (FDY) according to an FDY process with the PET melt, then the degradable polyester fiber is prepared after a relaxation heat treatment. The trilobal spinneret hole on the spinneret has three leaves with unequal lengths and angles, and all the trilobal spinneret holes are distributed in concentric circles, with a center line of the leaf opposite to the smallest angle in each trilobal spinneret hole passing through the center of the circle, and pointing away from the center of the circle. The process is simple, and the obtain fiber has good performances in degradation and elasticity.

Degradable polyester fiber and its preparation method

A thermal-moisture comfortable polyester FDY for summer use and a preparation method thereof are provided. The FDY is made of matting agents dispersed polyester via the steps of spinning melt metering, extruding via the compositional spinneret, cooling, oiling, drawing, heat setting and winding. The woven fabrics manufactured with the FDY possess a wicking height and an evaporation rate of larger than or equal to 135 mm and 0.22 g/h, respectively. The compositional spinneret is simultaneously provided with cruciform orifices and circular orifices, and the length ratio of cruciform orifice to circular orifice is equal to the product of their equivalent diameter ratio and a coefficient K, here equivalent diameter is the ratio of orifice cross-section area to its circumference and K ranges from 0.97 to 1.03, and the oiling involves the oiling agent containing 67.30-85.58 wt % of crown ether.

Method for preparing thermal-moisture comfortable polyester FDY

A lightweight heat-preserving fiber and a preparation method thereof are provided, wherein the fiber is prepared by measuring, composite spinneret's extruding, cooling, oiling, drawing, heat setting and winding a polyester melt. The composite spinneret has a hollow spinning hole and a circular spinning hole. The ratio of the micropore length of hollow spinning hole to circular spinning hole equals to the ratio of the equivalent diameter of hollow spinning hole to circular spinning hole multiplies the coefficient K, and the equivalent diameter is the ratio of the cross-sectional area to the circumference of the cross-section, the coefficient K ranges from 0.97 to 1.03. The oil agent contains a crown ether, and the content of the crown ether ranges from 67.30 to 85.58 wt %. The thermal conductivity of a knitted fabric having a basis weight of 100 g/mprepared by lightweight heat-preserving fiber is no larger than 0.150 W/m&#xb7;K.

Light weight heat-preserving fiber and preparation method thereof

A type of polyester yarn for an industrial sewing thread and preparing method thereof are provided. The preparing method is composed of a viscosity enhancing by a solid state polycondensation and a melt spinning for a modified polyester, and the modified polyester is a product of esterification and polycondensation of evenly mixed terephthalic acid, ethylene glycol, tert-butyl branched dicarboxylic acid, trimethylsilyl branched diol and a doped SbOpowder, wherein the tert-butyl branched dicarboxylic acid is selected from the group consisting of 5-tert-butyl-1,3-benzoic acid, 2-tert-butyl-1,6-hexanedioic acid, 3-tert-butyl-1,6-hexanedioic acid and 2,5-di-tert-butyl-1,6-hexanedioic acid. Moreover, the modified polyester is dispersed with a doped ZrOpowder. An obtained fiber has an intrinsic viscosity drop of 23-28% when stored at 25&#xb0; C. and R.H. 65% for 60 months.

Polyester yarn for industrial sewing thread and preparing method thereof

A type of easy-to-dye degradable polyester FDY and preparing method thereof are disclosed. The method for preparing an easy-to-dye degradable polyester FDY is to prepare a modified polyester FDY from a modified polyester melt with FDY process; wherein the material is a modified polyester; wherein the modified polyester has a molecular chain structure composed of terephthalic acid segments, ethylene glycol segments, 2,2,3,4,5,5-hexamethyl-3,4-hexanediol segments and tert-butyl branched heptanediol segments; wherein the modified polyester is dispersed by solid heteropolyacid powder calcined at a 400&#x2dc;700&#xb0; C. temperature. The preparing method has a simple process, modifying the polyester through solid heteropolyacid, tert-butyl branched heptanediol and 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, which increases the hydrolysis rate of the polyester, improves the dyeing performance and prepares products with excellent mechanical properties.

Easy-to-dye degradable polyester FDY and preparing method thereof

A one-step spun composite DTY and preparation method thereof are provided. The bi-profiled fiber is manufactured with two types of modified polyester of different viscosities through the steps of melting, melt metering, composite extruding, cooling, oiling, drawing, heat setting and winding. Wherein those two modified polyesters have a molecular structure including terephthalic acid segments, ethylene glycol segments and branched diol segments, and the branched diol has a structural formula of 

One-step spun composite DTY and preparation method thereof

A method for improving the quality of a polyester industrial yarn is provided. First, in the cooling process of preparing a polyester industrial yarn prepared by polyester spinning, the longitudinal height is kept unchanged, and the cross-sectional area of the slow cooling chamber is enlarged. The chamber maintains the surface temperature of the spinneret by means of heat preservation, and then uses an oil agent containing 67.30-85.58 wt % crown ether in the oiling process of polyester industrial yarn prepared by polyester spinning. Enlarging the cross-sectional area of the slow-cooling chamber refers to the cross section of the slow cooling chamber is changed from a circular shape to a rectangular shape while keeping the spinneret connected to the slow cooling chamber unchanged. The cleaning cycle of the spinneret is prolonged by 35-45%, the full package rate of polyester industrial yarn is larger than 99%.

Method for improving quality of polyester industrial yarn

A low-shrinkage polyester industrial yarn and a preparation method thereof are provided. The preparation method includes the following steps: subjecting the modified polyester to polycondensation, melting, measuring, extruding, cooling, oiling, stretching, heat setting and winding, wherein the content of the crown ether in the oil agent is 67.30-85.58 wt %. The material of the prepared low shrinkage polyester industrial yarn is a modified polyester, the molecular chain of the modified polyester includes a terephthalic acid segment, an ethylene glycol segment, and a branched diol segment, and the structural formula of the branched diol is as follows:  Wherein Rand Rare each independently selected from a linear alkylene group having 1-3 carbon atoms, Ris selected from an alkyl group having 1-5 carbon atoms, and Ris selected from an alkyl group consisting of 2-5 carbon atoms.

Low-shrinkage polyester industrial yarn and preparation method thereof

A type of feather-like polyester fiber and a preparing method thereof are disclosed. The preparing method is to manufacture filament from a modified polyester through a POY process with a four-fold flat spinneret and a successive DTY processes, wherein said modified polyester is the product of the esterification and the successive polycondensation reactions of evenly mixed terephthalic acid, ethylene glycol, main-chain silicated diol and fluorinated dicarboxylic acid, and the spinneret is the one set with four-fold flat shaped orifices. The obtained fiber has a dye uptake of 89.6-93.7% when dyed at 130&#xb0; C., and has an intrinsic viscosity drop of 13-20% when stored at 25&#xb0; C. and R.H. 65% for 60 months. This invention is simple to apply and features a product with good dyeing and degradation performance.

Feather-like polyester fiber and preparing method thereof

A bi-profiled fiber and preparing method thereof are provided. The bi-profiled fiber is manufactured through the steps of spinning melt metering, extruding via the composite spinneret, cooling, oiling, drawing, heat setting and winding, finally containing both double-cross monofilaments and circular monofilaments simultaneously. The bi-profiled fiber is made of the modified polyester, and the modified polyester is dispersed by matte agent and is composed of terephthalic acid segments, ethylene glycol segments and branched diol segments, and the branched diol segment has a structural formula of 

Bi-profiled fiber and preparing method thereof

A high-modulus low-shrinkage polyester industrial yarn obtained by subjecting a polyester to dissolution, washing and solid state polycondensation followed by spinning. The high-modulus low-shrinkage polyester industrial yarn has a dry heat shrinkage rate of 2.0&#xb1;0.25% under test conditions of 177&#xb0; C.&#xd7;10 min&#xd7;0.05 cN/dtex. The average value of the crystal volume Vc of the high-modulus low-shrinkage polyester industrial yarn is larger than 230 nm3. The high-modulus low-shrinkage polyester industrial yarn has a fiber modulus of &#x2265;100 cN/dtex. The polycondensation catalyst consists of magnesium ethylene glycol and antimony ethylene glycol, which has a small thermal degradation coefficient.

High-modulus low-shrinkage polyester industrial yarn and its preparation method

A high uniformity coloured polyester industrial yarn and preparation method. The raw material of the high-uniformity coloured polyester industrial yard is the modified polyester composed of terephthalic acid segment, an ethylene glycol segment and a branched diol. The high-uniformity coloured polyester industrial yarn is prepared by esterification reaction of terephthalic acid with a branched diol using concentrated sulfuric acid as catalyst to obtain terephthalic acid glycol ester. Terephthalic acid and ethylene glycol are formulated to carry out esterification reaction to obtain ethylene terephthalate. Finally, stir and mix the two materials and carry out the polycondensation reaction in the low vacuum stage and the high vacuum stage under the action of the catalyst and the stabilizer to obtain modified polyester. Measure the modified polyester and add black masterbatch. After porous spinneret extrusion, cooling, oiling, drawing, heat setting and winding the modified polyester, high uniformity coloured polyester industry yarn is obtained.

Growing community of inventors

Wujiang, China

Hongwei Fan