Method for producing square cross-section polyamide fibre and use thereof

A technology of polyamide fiber with square section, applied in fiber processing, textiles, papermaking, fabrics, etc., which can solve the problems of increased manufacturing cost, reduced cloth tear strength, and inability to fully meet the needs of airbags

Active Publication Date: 2009-05-27
SHINKONG SYNTHETIC FIBERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A kind of base fabric for vehicle airbags is disclosed in the Japanese patent application No. 6-41844, which utilizes chemical shrinkage to treat the fabric, and the processed filaments swell to obtain a low air permeability base fabric. However, this base fabric for vehicles There are disadvantages in the manufacturing method of the base fabric for airbags, which increases the manufacturing cost due to chemical treatment, and, because the use of chemical reagents will cause a decrease in the strength of the original yarn (that is, a decrease in the strength of the base fabric)
[0007] U.S. Patent No. 5,073,418 discloses a low-air-permeability fabric, an airbag made therefrom, and a method for making the same, which uses, for example, raw yarns of less than or equal to 600 denier to weave into cloth, and then processed by a calender To reduce the air permeability of the fabric, thereby improving the airtightness, but the method of this patent has the problem of reducing the tear strength of the cloth
[0008] Another example is that a kind of base cloth for air bag bag is disclosed in the patent application No. PKP 7-252740, which can be made of low air permeability, foldability and A base fabric for an uncoated airbag bag with good retractability, however, the air permeability of the base fabric prepared according to the method is greater than or equal to 0.3 cc / cm at an air pressure of 124 Pa 2 / sec, and therefore cannot adequately meet the lower air permeability requirements for airbags in recent years

Method used

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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  • Method for producing square cross-section polyamide fibre and use thereof
  • Method for producing square cross-section polyamide fibre and use thereof
  • Method for producing square cross-section polyamide fibre and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Such as image 3 As shown in the method flow, the polyamide 66 pellets with a relative viscosity (RV)=3.3 are melt-spun through the spinning assembly 1 at 292° C., and the molten polyamide 66 is passed through such as figure 2 The shown square spinning nozzle 2 is extruded, and after the filaments pass through the slow cooling zone 3 with a length (L) of 5 cm below the square spinning nozzle, cold air is supplied to the cooling zone 4 at a speed of 0.5 m / s The filaments are cooled and solidified, and after oiling the solidified spun yarn 5 passing through the cooling zone 4 through the oiling device 6, the total elongation ratio is 4.9 by 5 sets of continuous stretching rollers 7, 8, 9, 10 and 11. After double stretching and 7% relaxation treatment, the filaments are entangled by a blowing interlacer device (not marked), and the solidified spun filaments are coiled by a coiler at a speed of 2965m / min, and finally produced The polyamide fiber extended filament yarn 12 ...

Embodiment 2

[0081] According to the same method process and conditions as in Example 1, except that the length (L) used in Example 2 is a slow cooling zone of 10 cm, finally a polyamide fiber drawn filament yarn with a square cross-sectional shape is obtained.

[0082] Various physical property tests were carried out on the drawn drawn filament yarn, and the results are shown in Table 1.

Embodiment 3

[0084] According to the same method process and conditions as in Example 1, except that the slow cooling zone with a length (L) of 15 cm was used in Example 3, finally a polyamide fiber drawn filament yarn with a square cross-sectional shape was obtained.

[0085] Various physical property tests were carried out on the drawn drawn filament yarn, and the results are shown in Table 1.

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Abstract

The invention relates to method for producing a square cross section polyamide fiber yarn used for an uncoated air bag fabric, which is characterized by comprising the following steps: heating and melting a polyamide raw material, extruding out the raw material through a square like spinneret, and then cooling, curing and extending the raw material to obtain a polyamide fiber extension yarn with a square cross section shape. The invention also relates to an uncoated air bag fabric which is prepared by the method, and is characterized in that the fabric is provided with the square cross section polyamide fiber yarn and low air permeability, and the fire resistance and environment aging resistance of the fabric can be improved. The invention also relates to application of the uncoated air bag fabric with low air permeability prepared by the method.

Description

technical field [0001] The invention relates to a method for manufacturing a square-section polyamide fiber yarn for an uncoated airbag bag fabric, an uncoated airbag bag fabric prepared by the method, and an uncoated airbag fabric prepared by the method. Use of layer low air permeability air bag bag fabric. Background technique [0002] In recent years, with the improvement of car users' safety awareness, the number of airbags installed in cars has increased sharply to protect the safety of passengers and reduce the incidence of injuries. [0003] The fabric used in general airbags must have low air permeability so that it can expand smoothly when it is impacted, and must have high strength to prevent the rupture of the airbag itself. Abrasions were caused to the faces of the occupants. [0004] Traditionally, in the manufacture of airbag bag fabric, after weaving, it is often necessary to perform rubber coating on the surface of the fabric to make the fabric have low air...

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): D01D5/253D03D1/02D03D15/00D06M10/00D03D15/283D03D15/37
Inventor 沈淑贞涂益仁
Owner SHINKONG SYNTHETIC FIBERS
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