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Multifilament and braid

A technology of braiding and single yarn, which is applied in the direction of braiding, spinning solution preparation, filament/thread forming, etc., can solve the problems of low wear resistance, easy to change physical properties, etc., and achieve small changes in mechanical properties , The amount of fluff is reduced, and the effect of excellent wear resistance

Active Publication Date: 2016-11-16
TOYOBO MC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the conventional curtain cords are used as curtain cords for large curtains, their wear resistance is low, their physical properties tend to change greatly, and it is difficult to exert sufficient functions.

Method used

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  • Multifilament and braid
  • Multifilament and braid
  • Multifilament and braid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0197] A dispersion of ultra-high molecular weight polyethylene and decalin having an intrinsic viscosity of 18.0 dL / g, a weight average molecular weight of 2,900,000, and a peak melting point of 134° C. was prepared so that the polyethylene concentration was 11.0% by mass. Use an extruder to set the residence time in the temperature range of 205°C to 8 minutes, make a solution of this dispersion, and spray the polyethylene solution from the spinneret in a single hole at a spinneret surface temperature of 180°C. 4.5g / min sprayed. The number of orifices formed in the spinneret is 15, and the diameter of the orifices is The fine holes (one end of the orifice) for filament ejection formed on the surface of the spinneret are shielded so as not to be in direct contact with the outside air. The plates are shielded from exposure to outside air. The distance between the shielding plate and the pore closest to the shielding plate was set to 40 mm, and the distance between the shield...

Embodiment 1-2

[0199] In embodiment 1-1, the single hole ejection amount of polyethylene solution is set as 5.0g / min, the distance with the pore farthest from the shielding plate is set as 80mm, and the difference between the maximum temperature and the minimum temperature of the pore The difference is set to 4°C, the coefficient of variation CV" of the ejection amount of each pore is set to 11%, the spinning speed is set to 60m / min, and the draw ratio in hot air at 150°C is set to 2.5 times (total The stretching ratio is set to 10.0 times), the total stretching time is set to 6 minutes, and the deformation speed during stretching is set to 0.0200 seconds -1 , except that it was carried out in the same manner as in Example 1-1 to obtain a multifilament. The production conditions of the multifilaments are shown in Table 1, and the physical properties and evaluation results of the obtained multifilaments are shown in Table 2.

Embodiment 1-3

[0201] In Example 1-1, the distance from the pore farthest from the shielding plate was set to 45mm, the difference between the highest temperature and the lowest temperature of the pore was set to 2°C, and the coefficient of variation of the discharge amount of each pore was CV" is set to 6%, the total stretching time is set to 12 minutes, and the deformation speed during stretching is set to 0.0100 seconds -1 A multifilament was obtained in the same manner as in Example 1-1, except that the tension at the time of coiling was 0.200 cN / dtex, and the time from the start of stretching to coiling was 1 minute. The production conditions of the multifilaments are shown in Table 1, and the physical properties and evaluation results of the obtained multifilaments are shown in Table 2.

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Abstract

Provided are a multifilament and braid capable of being processed into a product over a wide temperature range, and having excellent dimensional stability and wear resistance. A multifilament comprising five or more monofilaments, wherein the multifilament is characterized in including a polyethylene having a limiting viscosity ([eta)) of 5.0-40.0 dL / g, the repeating units thereof being substantially ethylene, and the ratio of diffraction peak intensity of an orthorhombic crystal (200) surface in relation to the diffraction peak intensity of a orthorhombic crystal (110) surface in a cross-section of the monofilaments having a difference of 0.22 or less between the maximum and minimum value.

Description

technical field [0001] The present invention relates to a multifilament and a braid excellent in dimensional stability and abrasion resistance. Background technique [0002] Conventionally, polyethylene with an extremely high molecular weight, called ultra-high molecular weight polyethylene, has been used in many applications because of its excellent properties such as impact resistance. Among them, ultra-high molecular weight polyethylene fibers produced by the following production method are widely known as high-strength / high-elastic-modulus fibers: a polyethylene solution obtained by dissolving ultra-high molecular weight polyethylene in an organic solvent is extruded from an extruder. After being taken out, it is rapidly cooled to form a fibrous gel, and the production method (hereinafter also referred to as gel spinning method) of continuous stretching while removing the organic solvent from the gel (for example, Patent Document 1, Patent Document 1, Document 2). [0...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/04D04C1/02
CPCD01D1/02D01D5/04D01D5/0885D01F6/04D04C1/02D10B2321/0211B29C55/005B29K2623/06B29L2031/731
Inventor 福岛靖宪白子昌幸西村浩和
Owner TOYOBO MC CORP
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