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Polyester blended fiber and preparation method thereof

A blending fiber and blending technology, which is applied in the field of polyester blended fibers, can solve the problems of different dyeing properties, poor dyeing uniformity of composite fibers, and prone to color difference in fabrics, etc.

Active Publication Date: 2014-04-30
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the fiber is prepared by a composite method, the obtained fiber is a sheath-core fiber. Due to the difference in the molecular structure of the modified polyester and the thermoplastic resin, the dyeing performance of the dye on the modified polyester and the thermoplastic resin is different. It leads to poor dyeing uniformity of composite fibers, and the fabric is prone to problems such as color difference

Method used

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  • Polyester blended fiber and preparation method thereof
  • Polyester blended fiber and preparation method thereof
  • Polyester blended fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The structure of the modified polyester used in this embodiment is:

[0052]

[0053] Where 101 2 4 5 <5.

[0054] The above modified polyester chips and nylon 6 chips are uniformly mixed at a weight ratio of 95%:5%. The mixed chips are melted by a screw extruder at 265°C and then enter the spinning assembly, and are extruded through a circular hole spinneret. At the winding speed of 1500m / min, the modified polyester blend fiber undrawn yarn UDY is obtained, and then the first-stage drafting is carried out at 60℃, the drafting ratio is 4 times, and the second-stage drafting is carried out at 90℃, the drafting ratio After 1.2 times, the fiber was crimped, and then heat-set at 130°C for 15 minutes. The sizing fiber was cut short on a cutter and packaged to obtain a cotton-type modified polyester blend with a fineness of 1.33dtex and a length of 38mm short fibre. The fiber has a breaking strength of 3.5 cN / dtex, a breaking elongation of 35%, a modulus of 65 cN / dtex, a number ...

Embodiment 2

[0056] The structure of the modified polyester used in this embodiment is:

[0057]

[0058] Where 101 2 4 5 <10.

[0059] The above modified polyester chips and nylon 6 chips are uniformly mixed with a weight ratio of 90%: 10%. The mixed chips are melted by a screw extruder at 250°C and then enter the spinning assembly, and are extruded through the H-shaped hole spinneret. At a winding speed of 1800m / min, the modified polyester blend fiber undrawn yarn UDY is obtained, and then the first-stage drafting is carried out at 50℃, the drafting ratio is 3.5 times, and the second-stage drafting at 80℃, the drafting ratio After 1.1 times, the fiber was crimped, and then heat-set at 120°C for 15 minutes. After the set fiber was cut short on a cutting machine and packaged, a wool-type modified polyester blend with a fineness of 3.33dtex and a length of 90mm was obtained. short fibre. The fiber has a breaking strength of 3.2cN / dtex, a breaking elongation of 31%, a modulus of 50cN / dtex, a cr...

Embodiment 3

[0061] The structure of the modified polyester used in this embodiment is:

[0062]

[0063] Where 101 2 4 5 <20.

[0064] The above modified polyester chips and polymetaxylylene adipamide chips are uniformly mixed with a weight ratio of 90wt%: 10wt%. The mixed chips are melted by a screw extruder at 320°C and then enter the spinning assembly. Extrusion from a triangular hole spinneret at a winding speed of 1000m / min to obtain an undrawn yarn UDY of modified polyester blend fiber, and then conduct a first-level drafting at 70°C, a drafting ratio of 3 times, and a second-level drawing at 100°C Drafting, the drafting ratio is 1.2 times, then the fiber is crimped, and then heat-set at 200°C for 15 minutes. After the set fiber is cut short on a cutting machine and packaged, a wool type modification with a denier of 6dtex and a length of 150mm is obtained Polyester blend short fiber. The fiber has a breaking strength of 5cN / dtex, a breaking elongation of 45%, a modulus of 80cN / dtex, a...

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Abstract

The invention relates to a polyester blended fiber, and in particular relates to the polyester blended fiber and a preparation method thereof. The polyester blended fiber is prepared by modified polyester and polyamide through blending and melt spinning, wherein the modified polyester accounts for 60-95% of total quantity of the blended fiber in weight percentage, and the polyamide accounts for 5-40% of total quantity of the blended fiber in weight percentage. The glass-transition temperature of the modified polyester blended fiber is 50-75 DEG C, the dye-uptake rate of acid dyes under normal pressure is 85-99%, the dyeing uniformity is in 4-5 level, the moisture regain is 1.2-2.8% and the volume resistivity is 1.0*10<9>-5.0*10<12> Omega.cm. The polyester blended fiber can be dyed to have dark color by acid dyes at normal temperature and under normal pressure, the fiber and the fabric have soft handfeel and good moisture absorption property, and the problems of poor dyeing uniformity of the modified polyester complex fiber prepared by a combined melt spinning method and color difference of the fabrics are solved.

Description

Technical field [0001] The invention relates to a polyester blend fiber, in particular to a modified polyester blend fiber and a preparation method thereof. Background technique [0002] Polyester fiber has excellent properties such as high strength, high modulus, wear resistance and heat resistance, so it is widely used in clothing, home textiles, industry and other fields. However, due to the good linearity of the polyester molecule, there are no large side chains and branches on the molecular chain, and after stretching and shaping during the spinning process, the molecules are arranged neatly, with high crystallinity, good orientation, and intermolecular voids Small, the dye is not easy to penetrate; there are no hygroscopic groups such as hydroxyl and amino groups on the macromolecular chain, only ester groups with less polarity, so polyester fiber as a textile material has the disadvantages of poor dyeability, low hygroscopicity, and easy to generate static electricity. Th...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/12D01D5/08D01D5/12D01D5/253
Inventor 邱志成金剑李鑫柳毅琨
Owner CHINESE TEXTILE ACAD
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