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Air bag

An airbag and base fabric technology, which is applied in vehicle safety arrangement, pedestrian/occupant safety arrangement, textile and paper making, etc., to achieve the effect of good storage and light weight

Active Publication Date: 2013-12-11
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these patent documents, the mesh misalignment of the sewn part is controlled by specifying the elongation relationship between the "base fabric" and the "sewing thread" when the airbag is deployed, especially because the fineness of the base fabric is relatively high. No studies have been conducted on base fabrics that allow the elongation of the base fabric and the elongation of the sewn part to fall within the specified range

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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Examples

Experimental program
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Effect test

Embodiment 1

[0120] Nylon 66 filament yarn (monofilament cross-section is circular) with warp and weft denier of 470dtex / 72f, tensile strength of 8.6cN / dtex, elongation at break of 20%, shrinkage in boiling water of 9.5%, With a textile density of 55 threads / inch in both warp and weft, weave plain weave using a water jet loom, pass it through a hot water shrinkage tank without drying, and then pass it through a 2-stage drum dryer. A drying process in which the temperature T1 of the first stage is controlled at 120°C, and the temperature T2 of the second stage is controlled at 125°C. Table 1 shows the physical properties of the obtained base fabric.

[0121] In addition, the nylon 66 yarn with a denier of 1260 dtex, a tensile strength of 8.0 cN / dtex, and a breaking elongation of 29% was used as the sewing thread for both the face yarn and the bottom yarn, and a ring seam with a sewing pitch of 4.0 mesh / cm was performed. A sewn sample simulating a part of an airbag was made using the above ...

Embodiment 2

[0123] Nylon 66 filament yarn (monofilament cross-section is circular) with warp and weft denier of 700dtex / 144f, tensile strength of 8.3cN / dtex, elongation at break of 19%, shrinkage in boiling water of 9.6%, With a weaving density of 43 threads / inch in both warp and weft, weave plain weave using a water jet loom, pass it through a hot water shrinkage tank without drying, and then pass it through a 2-stage drum dryer. A drying process in which the temperature T1 of the first stage is controlled at 120°C, and the temperature T2 of the second stage is controlled at 125°C. Table 1 shows the physical properties of the obtained base fabric.

[0124] In addition, the nylon 66 yarn with a denier of 2520 dtex, a tensile strength of 7.8 cN / dtex, and a breaking elongation of 31% was used as the sewing thread for both the face yarn and the bottom yarn, and the lock stitching with a sewing pitch of 4.5 meshes / cm was performed. A sewn sample simulating a part of an airbag was made using ...

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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Abstract

[Problem] The purpose of the present invention is to provide an air bag capable of reducing the amount of gas leaking from a sewn portion of the air bag due to the high output and high temperature gas produced by the compact-sized inflators of the recent years, and having mechanical characteristics to withstand the high temperature gas. [Solution] An air bag by which the problem can be solved according to the present invention is a vehicle air bag comprising a main body portion made of a base fabric, and a sewn portion formed by sewing the main body portion into a bag with a sewing thread, characterized in that, when the sewing pitch in the sewn portion is a (stitches / cm), the difference between the extensibility of the sewing thread subjected to tension of 31.3 / a (N / thread) and the extensibility of the base fabric subjected to tension of 62.5 / a (N / stitch) is in a range of 0% to 5.0% for both a warp direction and a woof direction, and that the airflow rate in the sewn portion in an initial phase of deployment of the air bag at 40 kPa is less than 50 mm / cm / sec.

Description

technical field [0001] The present invention relates to an airbag for ensuring the safety of passengers in the event of a vehicle collision, and more particularly to an airbag having mechanical Airbags that control part of the gas leakage. Background technique [0002] In recent years, airbags have come into widespread use as safety devices for protecting passengers in the event of a vehicle collision. Conventionally, as a base fabric for an airbag, a fabric surface coated with silicone rubber or the like has been used. However, the coating treatment of such airbags using surface-coated fabrics has brought a lot of cost increase, and has the disadvantages of increased weight and increased thickness. Research on airbags, so-called non-coated airbags, has progressed, and some of them have begun to be put into practical use. [0003] In addition, in recent years, weight reduction and compactness of the airbag itself have been demanded. Therefore, downsizing of the inflator ...

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): B60R21/23B60R21/235D03D1/00
CPCB60R21/233B60R21/235D03D1/02D03D13/008B60R2021/23576Y10T428/1362Y10T442/3179
Inventor 仓本隆宏
Owner TOYOBO CO LTD
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