CN-121976337-A - Preparation method of high-shrinkage colorful sun-shading elastic fiber

CN121976337ACN 121976337 ACN121976337 ACN 121976337ACN-121976337-A

Abstract

The invention belongs to the technical field of polyester composite fibers, and relates to a preparation method of a high-shrinkage colorful sun-shading elastic fiber, which is prepared from three filaments by a texturing process, wherein the three filaments are respectively cationic polyester POY filaments, semi-dull polyester POY black filaments and semi-dull polyester high-shrinkage FDY filaments, the boiling water shrinkage rate of the semi-dull polyester high-shrinkage FDY filaments is 38.8-44%, and in the texturing process, the three filaments are firstly untwisted and compounded on a two-roller leather roller, then are subjected to grid-connected compounding in a network nozzle, and are subjected to shaping in a lower hot box through the two-roller auxiliary roller leather roller. According to the invention, three tows are firstly untwisted and compounded on the two roller leather rollers and then are combined in a grid connection mode in the network nozzle, so that the tows are more fully intertwined, the network point uniformity and the network point fastness of the product are remarkably improved, and meanwhile, the position of the network nozzle is adjusted from the rear of the lower hot box to between the two roller leather rollers and the auxiliary roller leather rollers, so that the operation of spinning up the tows is more convenient.

Inventors

LI PING
ZHONG QIFEN
LU XIAOLI
WU YAPING
Lao Mingju
HUANG WEIKUAN
WU GUOLIANG

Assignees

桐昆集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260209

Claims (10)

1. The preparation method of the high-shrinkage colorful sun-shading elastic fiber comprises the steps of preparing three filaments through an elasticizing process, wherein the three filaments are respectively cationic polyester POY filaments, semi-dull polyester POY black filaments and semi-dull polyester high-shrinkage FDY filaments, and the boiling water shrinkage rate of the semi-dull polyester high-shrinkage FDY filaments is 38.8-44%.
2. The method for preparing the high-shrinkage colorful sun-shading elastic fiber according to claim 1, wherein before the elasticized yarn reaches the two-roller leather rollers, the cationic polyester POY yarn sequentially passes through a raw yarn tube, a yarn cutter, a one-roller leather roller, a raw yarn rod, an upper hot box, a cooling plate, a Z twisting device, an online tension regulator and a two-roller yarn-shifting porcelain piece from front to back; before reaching the two-roller leather roller, the semi-dull polyester POY black yarn sequentially passes through a raw yarn tube, a yarn cutter, a one-roller leather roller, a raw head rod, an upper hot box, a cooling plate, an S-twist twisting device, an online tension regulator and a two-roller yarn-moving porcelain piece from front to back; Before reaching the two-roller leather roller, the semi-dull polyester high-shrinkage FDY yarn sequentially passes through a raw yarn tube, a yarn cutter, a zero-roller leather roller, a lower guiding porcelain wheel of a raw head rod, a lower guiding porcelain wheel of a cooling plate and a two-roller yarn-moving porcelain piece from front to back; after leaving the lower heat box, three kinds of wires sequentially pass through a three-roller wire moving porcelain piece, a three-roller leather roller, a wire sensor, an oil wheel rear guide porcelain wheel, a winding wire guide rod, a groove drum box and a winding frame from front to back.
3. The method for preparing the high-shrinkage colorful sun-shading elastic fiber according to claim 2, wherein the porcelain piece in each shredder is a semi-open grooved porcelain piece with hooks.
4. The preparation method of the high-shrinkage colorful sun-shading elastic fiber according to claim 2, which is characterized in that a movable yarn guiding porcelain wheel is arranged between the adjacent yarn cutter and a roller leather roller, the central axis of the movable yarn guiding porcelain wheel is parallel to the roller leather roller and is positioned below the roller leather roller; the roller leather roller consists of a roller positioned at the upper part and a leather roller positioned at the lower part; after leaving the shredder, the cationic polyester POY and semi-dull polyester POY black yarn first pass through the nip between one roller and one leather roller, then are wound for 2 circles on the whole body consisting of the leather roller and the movable yarn guiding porcelain wheel, and then are wound for half a circle on the roller.
5. The method of claim 4, wherein the base is fixedly connected to the cross member of the shredder adjacent thereto.
6. The method for preparing the high-shrinkage colorful sun-shading elastic fiber according to claim 2, wherein the porcelain piece at the inlet of the Z twisting device, the porcelain piece at the inlet of the S twisting device and the rear guide porcelain wheel of the oil tanker are rotary porcelain pieces, and the rotary porcelain pieces are porcelain pieces with the characteristic of rotating around the central shaft under the drive of tows.
7. The preparation method of the high-shrinkage colorful sun-shading elastic fiber according to claim 2, wherein the first roller leather roller and the second roller leather roller are both leather rollers with the diameter of 68-70 mm, and the polishing period of the leather rollers is 45 days.
8. The preparation method of the high-shrinkage colorful sun-shading elastic fiber according to claim 2, wherein talcum powder suspension with the concentration of 10-50wt% is sprayed on an inner wire of an upper hot box, and the spraying amount is 40-60 mL/m 2 .
9. The method for producing a high-shrinkage colorful sunshade elastic fiber according to claim 2, wherein the contact angle of the filament bundle and the cooling plate is 10 °.
10. The method for preparing the high-shrinkage colorful sun-shading elastic fiber according to any one of claims 2 to 9, wherein the specification of the cationic polyester POY yarn is 136dtex/36F, the specification of the semi-dull polyester POY black yarn is 130dtex/36F, and the specification of the semi-dull polyester high-shrinkage FDY yarn is 33 to 63dtex/12 to 24F; The texturing process parameters comprise a texturing speed of 550-700 m/min, a zero roller draft ratio of 1.000-1.005, a one roller draft ratio of 1.72-1.76, an upper hot box temperature of 165-195 ℃, a lower hot box temperature of 150-185 ℃, a network pressure of 3.0-3.7 bar, a semi-extinction polyester POY black yarn false twist ratio of 1.61-1.90, a cationic polyester POY yarn false twist ratio of 1.7-2.05, a yarn outlet ratio of-6.5 to-4.5%, a winding ratio of-6.0 to-4.0, a forming winding intersection angle of 27-32 ℃, a cooling plate temperature of 45-60 ℃ and a oiling frequency of 5.5-15.0 Hz.

Description

Preparation method of high-shrinkage colorful sun-shading elastic fiber Technical Field The invention belongs to the technical field of polyester composite fibers, and relates to a preparation method of a high-shrinkage colorful sun-shading elastic fiber. Background In the technical field of polyester composite fibers, the demands of downstream applications such as home textiles and outdoor clothing on functional polyester composite fibers are continuously improved, and particularly, composite fibers with high contractility, sun-shading function, dyeing diversity and elasticity are required to meet the comprehensive requirements of fabric thickness, sun-shading effect, color richness and elasticity for taking, so that the high-performance composite fibers become important directions for industry research and development and application. In the prior art, in order to realize the comprehensive performance, cationic polyester POY yarns, semi-dull polyester POY black yarns and semi-dull polyester high-shrinkage FDY yarns are generally adopted as core raw materials in industry, the functional polyester composite fibers are prepared through a texturing process, wherein the cationic polyester POY yarns are used for endowing fibers with dyeing diversity, the semi-dull polyester POY black yarns are used for providing basic sun-shading effects, the semi-dull polyester high-shrinkage FDY yarns are used for realizing the high-shrinkage characteristics of the fibers, the conventional texturing composite process comprises the steps that the cationic polyester POY yarns and the semi-dull polyester POY black yarns are firstly subjected to untwisting composite on a two roller leather roller of a texturing machine, then enter a lower hot box through the two roller auxiliary leather roller for shaping treatment, and the semi-dull polyester high-shrinkage FDY yarns are directly combined with the shaped cationic polyester POY yarns and the semi-dull polyester POY black yarns in a network nozzle positioned behind the lower hot box in a grid-connected mode, so that the composite fibers are finally prepared. The composite process has the obvious technical defects that the semi-dull polyester high-shrinkage FDY yarn does not participate in the untwisting and compounding process of the two-roller leather roller, and the three yarn bundles cannot be fully intertwined, so that the prepared composite fiber has poor network point uniformity and low network point fastness, and the phenomenon that the semi-dull polyester high-shrinkage FDY yarn is off-net easily occurs in the weaving process of a subsequent loom, so that the processing stability and the end use performance of the fabric are directly influenced. Meanwhile, in the prior art, the network nozzle is arranged at the rear of the lower hot box, the position is lower, the operation space is limited, a suction barrel is required to be used independently during head production operation, the cationic polyester POY yarns and the semi-dull polyester POY black yarns of the inner yarn path of the lower hot box and the semi-dull polyester high-shrinkage FDY yarns of the outer yarn path of the lower hot box are twisted and penetrate into the network nozzle one by one, the operation flow is complicated, the convenience is poor, the operation time consumption of single spindle position head production operation is long, the head production operation of 144 spindles is required to be completed by 4 groups of personnel, in addition, the waste yarn output is greatly increased due to complex head production operation, the production cost is improved, and the extra loss of production resources is caused. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a preparation method of a high-shrinkage colorful sun-shading elastic fiber. In order to achieve the above purpose, the invention adopts the following technical scheme: The preparation method of the high-shrinkage colorful sun-shading elastic fiber comprises the steps of preparing three filaments through an elasticizing process, wherein the three filaments are respectively cationic polyester POY filaments, semi-dull polyester POY black filaments and semi-dull polyester high-shrinkage FDY filaments, the boiling water shrinkage rate of the semi-dull polyester high-shrinkage FDY filaments is 38.8-44%, and in the elasticizing process, untwisting compounding is carried out on the three filaments on a two-roller leather roller, grid-connected compounding is carried out in a network nozzle, and shaping is carried out in a lower hot box through the two-roller auxiliary roller leather roller. According to the invention, before the three filaments are combined in the network nozzle in a grid-connected mode, the three filaments are untwisted and combined on the two-roller leather roller, so that the three filaments are mutually wound, the combination effect of the filament bundles is further improved, and the uni