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Crimped polyester fiber and fibrous structure comprising the same

A polyester fiber, crimping technology, applied in the field of fiber structure, can solve the problems of fiber web breakage, insufficient bulkiness and compression durability, and low number of crimps.

Inactive Publication Date: 2003-05-28
TEIJIN FRONTIER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the short fibers are produced by heat-treating the polytrimethylene terephthalate fibers, crimping them with a stuffing box crimping machine, and cutting the crimped fibers into short fibers. The existing problems are: short The fiber is only planar, the so-called two-dimensional crimp, and the fiber product obtained from the fiber has insufficient bulkiness
However, the crimped fibers obtained by this prior art method have an extremely low number of crimps or an excessively high crimp rate, and there is a problem that only fiber products with insufficient bulkiness and compression durability can be produced from such crimped fibers. , when the fiber web is wound on a drum or roller during the carding step, waste fibers, fiber web damage, etc. will occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Polytrimethylene terephthalate (intrinsic viscosity 0.85, melting point 225° C.) was used and melted at 260° C., and filaments were extruded from a known hollow circular cross-section spinneret (150 holes) at a discharge rate of 480 g / min. At the position 1.5-15cm below the spinneret surface, blow the quenching air at 25°C at a flow rate of 1.5m / s from one side of the filament at an angle perpendicular to the direction of travel of the filament, and blow it at a coil of 1200m / min Take the speed to obtain undrawn yarn. Then, the obtained undrawn yarn was made into a tow of 500,000 dtex, and then stretched 2.46 times by a two-stage hot water drawing method at 70°C×90°C. The drawn yarn was crimped by a stuffer crimper, cut into 64 mm long fibers, and subjected to relaxation heat shrinkage treatment at 135° C. to obtain helically three-dimensional crimped fibers having a hollow ratio of 15%. The obtained crimped fiber is made into a web by a carding machine, shaped into a ...

Embodiment 2 to 4 and comparative example 1 and 2

[0052] Except that the number of crimps and the crimp rate were changed as shown in Table 1 by adjusting the flow rate of the quenching air, the same process as in Example 1 was carried out to make a futon fiber filler and measure its performance. The results are shown in Table 1. Comparative example 3

Embodiment 6 and 7

[0060] In addition to making the cross-sectional area ratio of component E (sheath) / component P (core) in the thermally adhesive composite fiber, or the ratio of thermally bondable composite staple fiber / polytrimethylene terephthalate staple fiber in the fiber structure Except that the mixing ratio was changed as shown in Table 2, the same treatment as in Example 5 was carried out to obtain a fiber structure. Table 2 shows the results of evaluating the fiber structure.

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Abstract

A crimped polyester fiber which is made of a polytrimethylene terephthalate polyester, is three-dimensionally crimped so as to have a number of crimps of 9 to 30 per 25 mm and a percentage crimp of 20 to 50%, and has a crimp elasticity of 80% or higher; and a fibrous structure which comprises short fibers of the crimped polyester fiber and short heat-bondable composite fibers in a weight ratio of from 30 / 70 to 95 / 5 and in which at least part of the points where the two kinds of short fibers are in contact with each other and / or the points where the short heat-bondable composite fibers are in contact with each other have been thermally fixed.

Description

technical field [0001] The present invention relates to a polyester fiber having three-dimensional crimps and a fiber structure using the same. More specifically, it relates to a crimped polyester fiber which is good in carding properties, can provide articles rich in bulk and good compression durability, such as non-woven fabrics, fibrous fillings, etc., and a thermally bonded composite comprising the crimped polyester fiber Fibrous structure of short fibers. Background of the invention [0002] Polyester fibers, especially polyethylene terephthalate fibers, are fibers excellent in mechanical strength, chemical resistance, heat resistance, and the like, and are widely used for clothing, industrial applications, and the like. However, polyethylene terephthalate fiber itself is straight and lacks bulkiness. Therefore, in applications such as nonwoven fabrics or battings that require bulkiness, there have been many attempts to increase bulkiness by crimping polyethylene tere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/22D01F6/62D02G1/02D04H1/42D04H1/54
CPCD02G1/02D01D5/22Y10T428/2969Y10T428/2975Y10T428/2909Y10T428/2913D04H1/42D01F6/62Y10T428/2935D04H1/5405D04H1/435D04H1/55D04H1/43828D04H1/4383D04H1/43832D04H1/43835D04H1/43914D04H1/43918D04H1/5412D04H1/5414D04H1/5416D04H1/5418
Inventor 山田敏弘田代干雄塚本亮二马场健二
Owner TEIJIN FRONTIER CO LTD
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