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Coated Fabric for Airbag

a technology of airbags and coated fabrics, applied in the direction of textiles and paper, vehicle components, pedestrian/occupant safety arrangements, etc., can solve the problems of hardly occurring cohesive failure of sealing agents and coated surfaces

Inactive Publication Date: 2021-04-29
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a coated fabric that can be used for an airbag. This fabric has good adhesiveness between the coating and the sealing agent even after long-term, high-temperature aging. This means that the fabric is suitable for use in a rollover curtain airbag that uses a sealing agent at a sewing part. In simple terms, this coated fabric helps create a reliable and durable airbag that can withstand high levels of aging and temperature.

Problems solved by technology

Further, when the coating amount is large, there is a problem that coated surfaces are brought into contact with each other to increase adhesion.
However, although the adhesiveness at the initial presents no problem, the adhesiveness after high-temperature aging where the sealing agent is cured and the cohesive failure of the sealing agent hardly occurs, is not described at all in terms of a base fabric characteristic.

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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  • Coated Fabric for Airbag

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065]Polyamide 66 multi-filament yarn including 140 filaments in which the total fineness was 470 dtex was woven by plain weave in a water jet loom, and then the resulting product was subjected to a shrinkage processing using boiling water and a dry finishing at 130° C. In the resulting textile, the density of cloth in warp direction was 46 threads / 2.54 cm, the density of cloth in weft direction was 46 threads / 2.54 cm, and the cover factor was 1,994.

[0066]Next, an addition-polymerizable vinylmethyl silicone resin having a resin viscosity of 10000 mPa·sec was applied onto one side of the above textile with a floating knife coating. Then, the resin was cured at 200° C. for 1 minute to obtain a coated base fabric with a coating amount of 35 g / m2. An average resin thickness of warp and weft at a vertex portion on the textile surface of the obtained coated fabric was 11.3 μm, the weft strain / warp strain ratio was 0.57, and the bending resistance in warp and weft directions were 59 mm an...

example 2

[0067]A coated fabric for an airbag was prepared in the same manner as in Example 1 except for adjusting the coating amount of the resin after drying to 20 g / m2, and the weft strain / warp strain ratio as a base fabric physical property was varied to 0.48. In this time, an average resin thickness of warp and weft at a vertex portion on the textile surface of the obtained coated fabric was 7.3 μm, and the bending resistance in warp and weft directions were 64 mm and 72 mm, respectively. The characteristics of this coated fabric were evaluated and the results are shown in Table 1. The obtained coated fabric exhibited 100% cohesive failure of the sealing agent at the initial and after aging, and was excellent in adhesiveness between the coating agent and the sealing agent.

example 3

[0068]A coated fabric for an airbag was prepared in the same manner as in Example 1 except for using polyamide 66 multi-filament yarn including 72 filaments in which the total fineness was 470 dtex and adjusting the coating amount of the resin after drying to 26 g / m2, and the weft strain / warp strain ratio as a base fabric physical property was varied to 0.52. In this time, an average resin thickness of warp and weft at a vertex portion on the textile surface of the obtained coated fabric was 7.1 μm, and the bending resistance in warp and weft directions were 67 mm and 76 mm, respectively. The characteristics of this coated fabric were evaluated and the results are shown in Table 1. The obtained coated fabric exhibited 100% cohesive failure of the sealing agent at the initial and after aging, and was excellent in adhesiveness between the coating agent and the sealing agent.

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

The purpose of the present invention pertains to a coated fabric used for an automotive airbag, and more particularly, a coated fabric for an airbag most suitable for a rollover curtain airbag which is produced applying a sealing agent to a coated fabric and sewing the resulting fabric and which can keep the adhesion of the sealing agent to the coat resin even after long-term and high-temperature aging. The present coated fabric for an airbag is obtained by applying an addition-polymerizable solvent-free silicone resin onto at least one surface of a synthetic fiber textile, wherein a coating amount of the silicone resin is 15 to 45 g / m2; and a weft strain / warp strain ratio as observed in stretching the coated fabric is 0.30 to 0.65.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation of U.S. application Ser. No. 14 / 914,101, filed on Feb. 24, 2016, which is a 35 U.S.C. § 371 National Stage of International Application No. PCT / JP2014 / 072115, filed Aug. 25, 2014, which claims priority to JP 2013-174823, filed Aug. 26, 2013, all of which are incorporated by reference herein in their entirety.TECHNICAL FIELD[0002]The present invention relates to a silicone resin coated fabric used for an automotive airbag, and more particularly, to a coated fabric which is most suitable for a rollover curtain airbag.BACKGROUND ART[0003]Automotive airbags are used for the purpose of protecting an occupant's body such as a face, head and the like in the event of a crash by actuating a sensor following an impact, generating a high-temperature and high-pressure gas, and instantaneously inflating an airbag with this gas. In recent years, automotive airbags have been widely used as one of safety devices and have...

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(United States)
IPC IPC(8): B60R21/235D06N3/00D06N3/12
CPCB60R21/235D06N3/0006D06N2211/268B60R2021/23514D06N3/128
Inventor AKECHI, TSUTOMUKURAMOTO, TAKAHIRO
Owner TOYOBO CO LTD