JPH06278560A - Air bag module - Google Patents

Abstract

PURPOSE:To provide an air bag module, which is formed of a non-coat air bag and which can prevent a breakdown due to the melting of a peripheral part of an inflater by inflation and which can be recycled easily. CONSTITUTION:An apron C, which is made of at least one coat woven fabric, is bonded to the inside of a non-coat air bag A, in which at least one apron B made of non-coat woven fabric is sewn for bonding to the outside surface and/or the inside surface of a peripheral part of an inflator for an air bag A, by rivets J without sewing the apron C between a retainer K and a base plate L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag module, and more particularly to an air bag module which can prevent melting damage to the peripheral portion of the inflator and can be easily recycled.

[0002]

2. Description of the Related Art In recent years, needs for recycling and use of air bags have increased. One of the answers is a non-coated air bag, that is, an air bag made of a fabric that is not coated or impregnated with a resin such as silicone rubber or chloroprene rubber.

In such a conventional non-coated air bag, at least one apron made of a non-coated woven fabric is sewn and bonded to the outside and / or the inside of the inflator of the air bag made of woven fabric. There is known an air bag module in which the air bag module is improved by joining the retainer and the base plate with a rivet.

However, in such an air bag module, there is a drawback that the peripheral portion of the inflator where the high temperature gas is ejected during the inflation is easily melted and damaged. Therefore, it is effective to place an apron made of coated fabric around the inflator. However, if the apron made of coated fabric is sewn and joined to the non-coated fabric, it is necessary to separate it from the airbag module in order to collect and recycle it, but it is easy to separate the two. In addition, it was extremely inconvenient for recycling.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air bag module which is capable of avoiding melt damage of the peripheral portion of the inflator and is easy to be recycled.

[0006]

According to the present invention, at least one apron made of uncoated fabric is sewn to the outer surface and / or the inner surface of the fabric around the inflator of the air bag made of the fabric, and the retainer. In the airbag module in which the base plate and the base plate are joined together by rivets, at least one apron made of the coated fabric is polymerized on the inner surface of the apron made of the non-coated fabric without being sewn, and the space between the retainer and the base plate is formed. The present invention provides an air bag module characterized by being joined by rivets.

The present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of an airbag module during inflation showing one embodiment of the airbag module of the present invention.

In FIG. 1, A is an air bag made of non-coated fabric (hereinafter sometimes referred to as non-coated air bag), and B is an apron made of non-coated fabric (hereinafter sometimes referred to as non-coated apron).
, C is an apron made of coated fabric (hereinafter sometimes referred to as a coat apron), E is a sewing machine thread,
I is an inflator, J is a rivet, K is a retainer, and L is a base plate.

FIG. 1 shows a retainer K and a base plate L.
An apron B made up of two non-coated woven fabrics around the inflator I on the inner surface of the non-coated air bag A and one on the outer surface of the non-coated air bag A disposed between the non-coated air bag A and the sewing thread E. An apron C which is sewn and joined to the inner surface of the non-coated apron B and is made of at least one coated woven fabric.
Shows a state in which they are polymerized without being sewn and they are joined by rivets J.

FIG. 2 is also a side sectional view of the airbag module during inflation showing one embodiment of the airbag module of the present invention. FIG. 2 shows a mode in which a reinforcing woven fabric G is provided around the occupant side central portion as an air bag, and an air bag in which an inner belt F is sewn and joined is arranged.

In the present invention, the apron C made of coated fabric is not sewn with the non-coated airbag A,
Since the module is joined by the rivet J, when the module is collected, it can be easily separated from the non-coated airbag A by removing the rivet J, and the module can be recycled.

In the air bag module of the present invention, no coated fabric is used as the main body of the air bag A. This is because the air bag using the coated fabric is difficult to separate from the coated resin when it is recycled, and it is heavy and bulky and poor in handleability.

As shown in FIG. 1, for example, the non-coated air bag A has at least one non-coated apron B and a sewing thread E sewn to the outer surface and / or the inner surface of the airbag fabric around the inflator. ing. With the apron B, the retainer portion of the non-coated airbag A can be reinforced, and the airbag can be prevented from being damaged by the retainer portion during inflation. The apron B is made of non-coated woven fabric like the main body of the air bag A, and thus is easy to recycle. The number of non-coated aprons is more preferably 2 or more, most preferably 3 or more.

At least one coat apron C is provided around the inflator on the inner surface of the non-coat air bag A.
Distribute the sheets. On the outer surface of the non-coated air bag, the non-coated apron and / or the non-coated air bag around the inflator are easily melted and damaged during inflation, and the same result is obtained without the coated apron at all. Even if the coat apron C is not sewn to the non-coat air bag A, the non-coat air bag A and the non-coat apron B are not melted and damaged.

The coat apron C preferably has a diameter equal to or larger than that of the non-coat apron B.
If the diameter of the coat apron C is smaller than the diameter of the non-coat apron B, the non-coat apron B, the non-coat air bag A, or the sewn joint between the non-coat apron B and the non-coat air bag A is likely to be melted and broken. Two or more coat aprons C are more preferable, but four or more coats are heavy. The coat apron C is preferably polymerized so that its coat surface faces the inside of the air bag.

The fabric coating resin used for the coat apron C is preferably silicone rubber or chloroprene rubber, more preferably silicone rubber which has excellent heat resistance and can reduce the coat weight. Examples of the silicone rubber include dimethyl silicone, methyl vinyl silicone, methyl phenyl silicone, fluorosilicone, and the like. Most preferred is methyl vinyl silicone, which has excellent mechanical properties, cost, and operability.

Nylon 66 or polyester is preferable as the fiber material of the non-coated fabric used for the non-coated air bag A or the non-coated apron B and / or the coated fabric used for the coated apron C. When polyester woven fabric is used, since polyester is the most used fiber in the vehicle interior product, it can be collectively recycled for use. The materials of the uncoated woven fabric and the coated woven fabric may be the same or different, because they can be separated during recycling.

The sewing thread used for sewing the non-coated air bag A and the non-coated apron B is preferably non-coated sewing thread. If the sewing thread is coated, it is difficult to recycle. The sewing thread used for sewing the uncoated air bag A is preferably uncoated for the same reason.

The material fiber of the sewing thread is preferably the same as the material of the non-coated air bag A in order to facilitate recycling, and when the woven fabric constituting the non-coated air bag is nylon 66 woven fabric. It is preferable that the sewing thread is also a nylon 66 sewing thread, and in the case of a polyester fabric, the sewing thread is also preferably a polyester sewing thread. The combination that is easier to recycle is the combination of the uncoated polyester fabric and the uncoated polyester sewing thread for the same reason as above.

Examples of the polyester in the present invention include polyethylene terephthalate, polybutylene terephthalate, polyhexylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polyethylene-1,2-bis (phenoxy) ethane-4,4'-.
Other than dicarboxylate, polyethylene isophthalate, polybutylene terephthalate / naphthalate,
Mention may be made of copolymerized polyesters such as polybutylene terephthalate / decane dicarboxylate. Among them, polyethylene terephthalate, which has a good balance of mechanical properties and fiber forming properties, is particularly preferable.

In the non-coated airbag module of the present invention, known rivets, retainers and base plates can be used.

The non-coated airbag module of the present invention is suitable as an airbag module for driver's seats. The driver seat module has a high inflation temperature and must be reinforced with a coat apron, and the effect of the present invention not to sew and join is great for recycling the module.

[0023]

In the air bag module of the present invention, since the air bag having the non-coated apron is completely made of the non-coated fabric, the air bag can be easily recycled and used. In addition, since the apron made of coated fabric is joined to the airbag with rivets, it is possible to completely prevent melting damage around the inflator of the airbag during inflation, and the coated apron can be easily removed from the airbag body during collection. Can be separated into
Recycling of coated and uncoated fabrics is very easy.

[0024]

EXAMPLES The present invention will be described in more detail with reference to examples. The air bags in the examples were evaluated according to the following methods.

Melt damage prevention : Morton Int is installed in a module containing a 60-liter airbag for driver seats.
A type 4 inflator manufactured by ernational was attached, and this was heated at 95 ° C. for 6 hours or more to perform inflation immediately. At this time, the state of melt damage around the inflator of the airbag was observed.

Ease of recycling : The air bag and the apron were separated by removing the rivets, and the ease of separation at that time was evaluated to evaluate the ease of recycling.

Examples 1 to 4 and Comparative Examples 1 to 3 A non-coated airbag in which the non-coated apron shown in Table 1 is sewn and bonded and a coated apron are polymerized, and this is put between a retainer and a base plate as shown in FIG. It was placed and fastened with rivets to assemble a 60-liter driver airbag module. Next, using this module, the melt damage prevention property in inflation and the ease of recycling at the time of collection were evaluated. The results are shown together in Table 1.

[0028]

[Table 1]

[0029]

According to the module of the present invention, it is possible to prevent the melt damage of the peripheral portion of the inflator of the non-coated airbag. At the same time, the apron made of the coated fabric and the airbag main body made of the non-coated fabric can be easily separated from each other, which is extremely easy to recycle.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of an airbag module during inflation showing one embodiment of the airbag module of the present invention.

FIG. 2 is a side cross-sectional view of the airbag module during inflation, showing a mode in which an airbag having a reinforced woven fabric around the occupant side central portion and having an inner belt sewn and joined is arranged.

[Explanation of symbols]

 A non-coated air bag B non-coated apron C coated apron D vent hole E sewing machine thread F belt G reinforced fabric H belt catcher I inflator J rivet K retainer L base plate

Claims (8)

[Claims] 1. At least one apron made of uncoated fabric is sewn to the outer surface and / or the inner surface of the fabric around the inflator of the air bag made of fabric, and the rivet is provided between the retainer and the base plate. In the airbag module joined by, at least one apron made of the coated fabric is polymerized on the inner surface of the apron made of the non-coated fabric without being sewn and joined by a rivet between the retainer and the base plate. An air bag module characterized by that. 2. The coated fabric is a fabric coated with silicone rubber or chloroprene rubber.
Airbag module as described. 3. The airbag module according to claim 1, wherein the non-coated woven fabric is nylon 66 woven fabric or polyester woven fabric. 4. The airbag module according to claim 1, wherein the coated fabric is a nylon 66 fabric or a polyester fabric. 5. The airbag module according to claim 1, wherein the sewing is joined by a non-coated sewing thread. 6. The air bag is non-coated nylon 66.
The airbag module according to any one of claims 1 to 5, which is made of a woven fabric and is sewn with a non-coated nylon 66 sewing thread. 7. The air bag module according to claim 1, wherein the air bag is made of a non-coated polyester fabric and sewn with a non-coated polyester sewing thread. 8. The air bag module according to claim 1, wherein the air bag is a driver seat air bag.