KR20200093234A - Eco-Friendly Airbag Fabric and Method for Manufacturing The Same - Google Patents

Abstract

Provided is an eco-friendly airbag fabric which can ensure excellent airtightness of an airbag since a coating layer has high adhesion to a fiber substrate, and can be reused due to the melting of the fiber substrate and a coating material without need of separating the coating material from the fiber substrate when disposing the airbag. Also provided is a manufacturing method thereof. To this end, the eco-friendly airbag fabric comprises: the fiber substrate woven from a PET fiber; a main coating layer located on the fiber substrate and comprising a PET-based elastomer; and a PET nonwoven fabric on the main coating layer.

Description

Eco-friendly airbag fabric and method for manufacturing the same

The present invention relates to an airbag fabric and a method for manufacturing the same, and more specifically, since the coating layer has a high adhesion to the fiber substrate, it can not only ensure excellent airtightness of the airbag, but also coats it from the fiber substrate when discarding the airbag. It relates to an environmentally friendly airbag fabric that can be reused by melting them together without the need to separate materials, and a method for manufacturing the same.

When the impact detection sensor detects the impact on the vehicle during a collision or overturning of a vehicle that is traveling at a predetermined speed or higher, the airbag expands and expands by the high temperature and high pressure air provided from the inflator to protect the driver and passengers of the vehicle from accidents. do.

In general, an airbag includes a fiber substrate and a coating layer thereon.

The fiber substrate is formed of synthetic fibers (for example, polyamide such as nylon, polyester such as PET, etc.) capable of preventing the airbag from being ruptured by high temperature and high pressure air supplied from the inflator.

The coating layer is to provide the airtightness required for the airbag, and is generally formed by applying a thermosetting elastomer such as polyurethane, silicone, or polychloroprene on the fiber substrate and then performing a high temperature thermosetting process.

When the adhesive strength between the fiber substrate and the coating layer is low, the friction between the airbag fabric and its surrounding structures is caused by vibration of the airbag module mounted in the vehicle, and the peeling of the coating layer from the fiber substrate is unintentionally caused. Can. In addition, when the airbag is deployed by high temperature and high pressure air, the coating layer may be peeled from the fiber substrate. Such peeling of the coating layer makes it impossible to keep the airbag in an inflated form in the event of an accident, and as a result, it is impossible to properly protect the occupant from a vehicle accident.

Primers can be added to the elastomeric coating material to increase the adhesion between the fiber substrate and the coating layer, but the production cost is increased due to the use of the primer, as well as environmental pollution caused by volatile organic compounds (VOC). .

As an alternative method to increase the adhesion between the fiber substrate and the coating layer without using a primer, the amount of the elastomer coating may be increased, but this also not only entails an increase in manufacturing cost, but also increases the airbag weight, thereby reducing vehicle fuel efficiency.

On the other hand, a coating layer having a high adhesion to the fiber substrate is preferable in terms of airtightness of the airbag, but there is a problem that it is difficult to separate the coating layer formed of a thermosetting resin from the fiber substrate formed of a thermoplastic resin when discarding the airbag.

In other words, in order to recycle the fiber substrate, the coating layer must first be separated from the fiber substrate. However, it is not easy to separate the coating layer strongly adhered to the fiber substrate from the fiber substrate. Although the coating layer can be forcibly separated from the fiber substrate using a harmful agent, there is a problem that an environmental problem is caused by the use of the harmful agent. Therefore, conventional airbags are thrown away as industrial waste, which is a serious environmental problem.

On the other hand, since the coating layer becomes sticky with the passage of time, adhesion of facing surfaces may occur when the airbag is stored in a folded state for a long period of time in a vehicle. In order to prevent such adhesion, a top coating layer made of talc is further formed. The top coating layer made of a different material from the fiber substrate must also be separated for recycling of the fiber substrate, and this separation of the top coating layer makes recycling of the fiber substrate more complicated and difficult.

Accordingly, the present invention relates to an airbag fabric and a method of manufacturing the same, which can satisfy the needs of the related technical fields as above.

One aspect of the present invention is that the coating layer has a high adhesion to the fiber substrate, so as to ensure excellent airtightness of the airbag, they are melted and reused together without the need to separate the coating material from the fiber substrate when the airbag is disposed. This is to provide an environmentally friendly airbag fabric.

Another aspect of the present invention is that the coating layer has a high adhesion to the fiber substrate, so as to ensure excellent airtightness of the airbag, and when the airbag is disposed, they are melted together and reused without the need to separate the coating material from the fiber substrate. It is possible to provide a method for manufacturing an eco-friendly airbag fabric.

In addition to the above-mentioned aspects of the present invention, other features and advantages of the present invention are described below, or it will be clearly understood by those skilled in the art from the description.

According to one aspect of the present invention as described above, a textile substrate (textile substrate) woven from PET fibers; A main coating layer located on the fiber substrate and including a PET-based elastomer; And a PET nonwoven fabric on the main coating layer.

The PET-based elastomer may include hard segment PET and soft segment polytetramethylene glycol (PTMG) or polypropylene glycol (PPG), and the weight ratio of the hard segment to the soft segment is 60:40 to 80:20. Can be

The weight per unit area of the main coating layer may be 15 to 120 g/m ² .

The PET nonwoven fabric may have a weight per unit area of 5 to 50 g/m ² .

The eco-friendly airbag fabric may further include a PET adhesive layer between the fiber substrate and the main coating layer.

The fiber substrate may be a fabric including warp yarns and weft yarns.

After performing aging for 408 hours at a temperature of 70±2 °C and a relative humidity of 95±2%, the scrub resistance of the eco-friendly airbag fabric measured in accordance with ISO 5981 standard may be 1,000 strokes or more in both the warp direction and the weft direction. .

The fiber substrate may be a One Piece Woven (OPW) type fabric, each of the warp yarns and the weft yarns may have a fineness of 210 to 1500 denier, the density of the warp yarns and the warp yarns The density may be from 40 th/inch to 80 th/inch based on one layer of the chamber area of the fabric.

According to another aspect of the present invention, weaving the fiber substrate with PET fibers; Applying a coating solution containing a PET-based elastomer onto the fiber substrate; Attaching the PET nonwoven fabric to the coating solution applied on the fiber substrate; And cooling the fiber substrate coated with the coating solution.

The PET-based elastomer may include hard segment PET and soft segment polytetramethylene glycol (PTMG) or polypropylene glycol (PPG), and the weight ratio of the hard segment to the soft segment is 60:40 to 80:20. Can be

The coating solution may be applied on the fiber substrate in an amount of 15 to 120 g/m ² .

The PET nonwoven fabric may have a weight per unit area of 5 to 50 g/m ² .

The method for manufacturing the eco-friendly airbag fabric may further include adding a water-based PET adhesion promoter on the fiber substrate before the coating liquid application step.

The cooling step may be performed at 0 to 50 ℃.

Both the above general description and the following detailed description are only intended to illustrate or describe the present invention, and should be understood to provide a more detailed description of the invention of the claims.

According to the present invention, since the fiber substrate and the main coating layer are strongly adhered to each other, high airtightness and durability required for the airbag can be satisfied.

In addition, since the fiber substrate and the main coating layer are formed of the same type of polymer, the airbag can be easily recycled by melting them together without having to separate the coating material from the fiber substrate when discarding the airbag.

Moreover, the airbag of the present invention comprises a non-woven fabric formed of the same type of polymer as the fiber substrate and the main coating layer as an adhesion prevention layer, thereby preventing adhesion of the airbag facing each other in a folded state without compromising its recyclability. Can.

The accompanying drawings are intended to help the understanding of the present invention and constitute a part of the present specification, and exemplify embodiments of the present invention, and describe the principles of the present invention together with a detailed description of the present invention.
1 is a cross-sectional view of an airbag fabric according to an embodiment of the present invention,
2 is a cross-sectional view of an airbag fabric according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments described below are presented for illustrative purposes only to assist in a clear understanding of the present invention, and do not limit the scope of the present invention.

It will be apparent to those skilled in the art that various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention. Accordingly, the present invention includes all modifications and variations falling within the scope of the invention described in the claims and equivalents thereof.

1 is a cross-sectional view of an airbag fabric 100 according to an embodiment of the present invention.

As illustrated in FIG. 1, the airbag fabric 100 according to an embodiment of the present invention is located on the fiber substrate 110 woven from PET fibers, the fiber substrate 110 and includes a PET-based elastomer It includes a main coating layer 120, and a PET nonwoven fabric 130 on the main coating layer 120.

The fiber substrate 110 may be a fabric including PET fibers as warp yarns 111 and weft yarns 112. For example, the fiber substrate 110 is a conventional fabric used when manufacturing an airbag according to a'Cut & Sew' method, or a one-piece having an expanded portion (chamber region) and a non-expanded portion It may be a woven (OPW) type of fabric.

The density of the warp yarns 111 and the density of the weft yarns 112 may be between 40 and 80 th/inch (for OPW fabric, the density is based on one layer of the chamber area).

In order to have sufficient mechanical strength to prevent the airbag from being ruptured by the high temperature and high pressure air supplied from the inflator during airbag deployment, the fineness of the theodolites 111 and 112 is preferably 210 denier or more. On the other hand, for the folding property and weight reduction of the airbag, the fineness of the warp yarns 111 and 112 is preferably 1500 denier or less.

In addition, from the viewpoint of flexibility, smoothness of the coated surface, etc., it is preferable that each of the warp yarns 111 and 112 is a multifilament including 72 or more filaments 111a and 112a.

The main coating layer 120 of the present invention located on at least one surface of the fiber substrate 110 is to provide the airtightness required for the airbag, and includes a PET-based elastomer, which is a type of thermoplastic elastomer.

The PET-based elastomer is a type of thermoplastic elastomer (TPE), which is a hard segment (HS) PET and a soft segment (SS) polytetramethyleneglycol (PTMG) or polypropylene glycol (polyprophyleneglycol). ) (PPG), the weight ratio of the hard segment (HS) to the soft segment (SS) (ie, HS:SS) may be adjusted within a range of 60:40 to 80:20. If the ratio of the hard segment (HS) is higher than this range, the strength of the coating layer 120 becomes high, but it becomes too rigid to exhibit the properties of rubber. On the other hand, if the ratio of the hard segment (HS) is lower than this range, the flexibility and stretchability of the coating layer 120 is high, but the strength is not sufficient, so that high-temperature, high-pressure gas leaks, thereby deteriorating the performance of the airbag.

Since the fiber substrate 110 and the main coating layer 120 are formed of the same type of polymer (ie, PET), when the airbag is disposed, the main coating layer 120 is not separated from the fiber substrate 110 The airbags can be easily recycled by melting them together.

However, in the case of recycling where the purity of the polymer obtained by melting the airbag is not a problem, a PBT-based elastomer containing PBT instead of PET as the hard segment HS may be used to form the coating layer 120. PBT-based elastomer is a type of thermoplastic ester-based elastomer (TPEE), like PET-based elastomer, and has the advantage that the polymerization reaction can be improved due to the excellent reactivity of PBT.

According to an embodiment of the present invention, the weight per unit area of the main coating layer 120 may be 15 to 120 g/m ² . If the weight per unit area of the main coating layer 120 is less than 15 g/m ² , sufficient adhesion between the fiber substrate 110 and the main coating layer 120 may not be secured, and the pressure-resistance of the airbag is reduced. On the other hand, if the weight per unit area of the main coating layer 120 exceeds 120 g/m ² , there is a high risk of adhesion of a folded surface due to long-term storage of the air bag, and the folding property (or storage property) of the air bag is deteriorated. .

According to an embodiment of the present invention, the penetration rate of the main coating layer 120 to the fiber substrate 110 is preferably 10 to 50%, more preferably 25 to 40%. The penetration rate is defined by Equation 1 below.

* Equation 1: Penetration rate (%) = (D/T) × 100

Here, D is the maximum depth of penetration of the main coating layer 120 into the fiber substrate 110, and T is the thickness of the fiber substrate 110. D and T may be measured through an SEM photograph of the cross section of the airbag fabric 100.

If the penetration rate of the main coating layer 120 is less than 10%, the airbag fabric 100 may have excellent flexibility, but when the adhesive strength between the fiber substrate 110 and the main coating layer 120 is low, they are stored in a vehicle for a long time. There is a risk of separation. Such peeling of the main coating layer 120 makes it impossible to maintain the airbag in an inflated form for a predetermined time immediately after an accident.

According to the present invention, since the penetration rate of the main coating layer 120 is 10% or more, after aging for 408 hours under a temperature of 70±2° C. and a relative humidity of 95±2%, measured according to ISO 5981 standard The scrub resistance of the airbag fabric 100 is 1,000 strokes or more in both the warp direction and the weft direction, which means that the main coating layer 120 is peeled from the fiber substrate 110 only after 1,000 strokes or more. The improvement of the scrub resistance of the airbag fabric 100 is due to the anchoring effect of the main coating layer 120 formed by deep penetration into the fiber substrate 110.

On the other hand, when the penetration rate of the main coating layer 120 exceeds 50%, the ductility of the airbag fabric 100 increases rapidly (that is, the flexibility decreases rapidly), and thus its folding property, tear strength, and storage property of the airbag are Falls out.

The PET nonwoven fabric 130 of the present invention located on the main coating layer 120 functions as an adhesion prevention layer.

As described above, since the main coating layer 120 becomes sticky with the passage of time, when the airbag is stored in a folded state for a long period of time, adhesion of faces that are folded and faced may be caused. In order to prevent such adhesion, the airbag fabric 100 of the present invention further includes a PET nonwoven fabric 130 on the main coating layer 120. The PET non-woven fabric 130 is folded to prevent the adhesion of the main coating layer 120 facing each other by preventing contact with each other or by minimizing the contact area.

According to the present invention, since the nonwoven fabric 130 used as the adhesion prevention layer is also formed of the same type of polymer (ie, PET) as the fiber substrate 110 and the main coating layer 120, they are melted together without a separate separation process. By doing so, the airbag can be easily recycled.

The PET nonwoven fabric 130 may have a weight per unit area of 5 to 50 g/m ² . If the weight per unit area of the PET nonwoven fabric 130 is less than 5 g/m ² , the surfaces of the main coating layers 120 facing each other cannot be prevented from being adhered to each other. On the other hand, if the weight per unit area of the PET nonwoven fabric 130 exceeds 50 g/m ² , the weight of the airbag only increases without a significant increase in the adhesion prevention function, so that it is unable to satisfy the vehicle's lightening needs.

Hereinafter, a method of manufacturing the airbag fabric 100 according to an embodiment of the present invention will be described in detail.

First, the fiber substrate 110 is woven from PET fibers.

As described above, the fiber substrate 110 includes 72 or more filaments 111a and 112a and PET fibers having a total fineness of 210 to 1500 denier, respectively, as warp yarns 111 and weft yarns 112. It may be a fabric, and may be a conventional fabric or an OPW type fabric having an expanded portion (chamber region) and a non-expanded portion.

Subsequently, a coating solution containing a PET-based elastomer is uniformly applied on at least one surface of the fiber substrate 110.

As described above, the PET-based elastomer is a type of thermoplastic elastomer (TPE), and includes PET, which is a hard segment (HS) and polytetramethylene glycol (PTMG) or a polypropylene glycol (PPG), which is a soft segment (SS). , The weight ratio (ie, HS:SS) of the hard segment (HS) to the soft segment (SS) may be adjusted within a range of 60:40 to 80:20. If the ratio of the hard segment (HS) is higher than this range, the strength of the coating layer 120 becomes high, but it becomes too rigid to exhibit the properties of rubber. On the other hand, if the ratio of the hard segment (HS) is lower than this range, the flexibility and stretchability of the coating layer 120 is high, but the strength is not sufficient, so that high-temperature, high-pressure gas leaks, thereby deteriorating the performance of the airbag.

Alternatively, in the case of recycling in which the purity of the polymer obtained by melting the airbag is not a problem, a coating liquid containing a PBT-based elastomer containing PBT instead of PET may be used as the hard segment (HS). PBT-based elastomer is a type of thermoplastic ester-based elastomer (TPEE), like PET-based elastomer, and has the advantage that the polymerization reaction can be improved due to the excellent reactivity of PBT.

The coating method is not particularly limited, but a knife coating method, a roll coating method, a T die method, etc. may be used.

The coating solution containing a PET-based elastomer may be applied on at least one surface of the fiber substrate 110 in an amount of 15 to 120 g/m ² . When the application amount is less than 15 g/m ² , sufficient adhesive strength between the fiber substrate 110 and the main coating layer 120 cannot be secured, and the pressure-resistance of the airbag is deteriorated. On the other hand, when the application amount exceeds 120 g/m ² , there is a high risk of causing adhesion of the folded surface due to long-term storage of the airbag, and the folding (or storage) property of the airbag deteriorates.

According to one embodiment of the present invention, by adjusting the viscosity of the coating solution through the addition of a thickener (for example, 6,000 to 30,000 cps) or by controlling the tension applied to the fiber substrate 110 during coating, the fiber of the coating solution The penetration rate to the substrate 110 is preferably 10 to 50%, more preferably 25 to 40%.

On the other hand, in order to improve the weaving properties, an emulsion or a sizing agent may be imparted to the PET yarn before weaving. In this case, before applying the coating solution on at least one side of the fiber substrate 110, refining the fiber substrate 110 to remove the emulsion or sizing agent, the refined fiber substrate 110 The step of washing with water and the step of drying or heat-treating the washed fiber substrate 110 may be further performed.

Subsequently, the PET nonwoven fabric 130 is attached to the coating solution applied on the fiber substrate 110.

As described above, the weight per unit area of the PET nonwoven fabric 130 may be 5 to 50 g/m ² . If the weight per unit area of the PET nonwoven fabric 130 is less than 5 g/m ² , the surfaces of the main coating layers 120 facing each other cannot be prevented from being adhered to each other. On the other hand, if the weight per unit area of the PET nonwoven fabric 130 exceeds 50 g/m ² , the weight of the airbag only increases without a significant increase in the adhesion prevention function, so that it is unable to satisfy the vehicle's lightening needs.

Subsequently, a main coating layer 120 is formed between the fiber substrate 110 and the PET nonwoven fabric 130 by cooling the fiber substrate 110 coated with the coating solution using a cooling roll. The cooling step may be performed at 0 to 50 ℃.

Optionally, in order to further improve the adhesion with the fiber substrate 110, a process of compressing with a calender roll before the coating solution is cooled and solidified may be further performed. Alternatively, a pressing process and a cooling process may be performed simultaneously by mounting a calender roll on the cooling roll to perform a function as a presser.

Hereinafter, the airbag fabric 200 according to another embodiment of the present invention will be described with reference to FIG. 2.

As illustrated in FIG. 2, the airbag fabric 200 according to another embodiment of the present invention is located on the fiber substrate 210 woven from PET fibers, the fiber substrate 210 and includes a PET-based elastomer It is similar to the airbag fabric 100 of the above-described embodiment in that it includes a main coating layer 220, and a PET nonwoven fabric 230 on the main coating layer 220.

However, the airbag fabric 200 according to another embodiment of the present invention described above in that it further comprises a PET adhesive layer 240 for enhancing their adhesive strength between the fiber base 210 and the main coating layer 220 It is different from the airbag fabric 100 of the embodiment.

The PET adhesive layer 240 may be formed by applying a water-based PET adhesion promoter on the fiber substrate 210 before applying a coating solution on the fiber substrate 210. Since the fiber substrate 210, the adhesive layer 240, the main coating layer 220, and the nonwoven fabric 230 are all formed of the same polymer (PET), the airbags can be easily recycled by melting them together without a separate separation process. Can.

Hereinafter, the present invention will be described in detail through specific examples. However, the following examples are only to aid the understanding of the present invention, and the scope of the present invention should not be limited thereby.

Example 1

An OPW type fiber substrate was woven from PET yarn using a jacquard loom. The OPW fiber substrate was dried and heat-treated after sequentially passing through a refining tank and a water washing tank (inclination density: 57th/inch, weft density: 49th/inch).

A coating solution containing a PET-based elastomer (HS: PET, SS: PTMG) was uniformly applied to both sides of the fiber substrate in an amount of 25 g/m ² using a T die coating method. The ratio of the hard segment (HS) to the soft segment (SS) of the PET-based elastomer (ie, HS:SS) was 70:30.

Subsequently, an airbag fabric was completed by attaching a PET nonwoven fabric having a weight per unit area of 15 g/m ² to the coating solution and cooling to form a main coating layer between the fiber substrate and the PET nonwoven fabric.

Example 2

An airbag fabric was obtained in the same manner as in Example 1, except that a water-based PET adhesion promoter was applied on the fiber substrate before applying the coating solution to the fiber substrate.

Example 3

An airbag fabric was obtained in the same manner as in Example 2, except that the coating amount of the coating solution was 35 g/m ² .

Example 4

An airbag fabric was obtained in the same manner as in Example 2, except that the application amount of the coating solution was 45 g/m ² .

Example 5

An airbag fabric was obtained in the same manner as in Example 2, except that the coating amount of the coating solution was 90 g/m ² .

Example 6

An airbag fabric was obtained in the same manner as in Example 2, except that the coating amount of the coating solution was 120 g/m ² .

Example 7

An airbag fabric was obtained in the same manner as in Example 2, except that the coating amount of the coating solution was 130 g/m ² .

Comparative Example 1

A commercially available polyurethane (PU) coating solution was used instead of the coating solution containing PET-based elastomer (application amount: 30 g/m ² ), and the heat treatment process was performed at 180° C. instead of the cooling process after the coating process. In the same manner as in Example 1, an airbag fabric was obtained.

The airtightness and coating adhesion of the airbag fabrics of Examples 1 to 7 and Comparative Example 1 prepared as above were measured as follows, and the results are shown in Table 1 below.

* Airtightness measurement

By injecting air of 2.5 KPa into the layer separation portion of the OPW fiber substrate, the chamber area is completely inflated, and then the total amount of air exiting per unit time is measured, and the total amount of air is divided by the total length of the OPW fiber substrate to be joined. The unit length and air discharge amount per unit time (ℓ/min·cm) were calculated.

* Coating adhesion ( Scrub resistance ) Measure

Aging was performed by leaving the fabric sample under a temperature of 70±2° C. and a relative humidity of 95±2% for 408 hours. Subsequently, the scrub resistance of the airbag fabric measured in accordance with ISO 5981 standards for the warp direction and the weft direction was measured. Specifically, the fabric sample was repeatedly reciprocated in a state where 10 N load was applied to the fabric sample while both ends of the fabric sample were fixed with clamps. After carrying out 500 reciprocating motions (that is, 1000 strokes), which are more severe conditions than the airbag test standard 300 reciprocating motions (that is, 600 strokes), the presence or absence of peeling of the coating layer was observed.

Airbag fabric manufacturing method Airbag fabric Coating liquid material Coating solution application amount (g/m ² ) Whether adhesion promoters are used Confidentiality
(ℓ/min·cm) Whether the coating layer is removed Example 1 PET 25 No 0.8 No Example 2 PET 25 Yes 0.7 No Example 3 PET 35 Yes 0.5 No Example 4 PET 45 Yes 0.4 No Example 5 PET 90 Yes 0.3 No Example 6 PET 120 Yes 0.2 No Example 7 PET 130 Yes 0.2 No Comparative Example 1 PU 30 No 0.7 No

As can be seen from Table 1, although the airbag fabrics of Examples 1 to 7 of the present invention were made of materials of the same kind, the airbag fabrics of Comparative Example 1 using PU coating liquid were improved despite the improved recyclability of the airbags. It can be seen that it shows almost the same or better airtightness and coating adhesion.

100, 200: airbag fabric 110, 210: fiber base
120, 220: main coating layer 130, 230: PET non-woven fabric
240: PET adhesive layer

Claims (13)

A textile substrate woven from PET fibers;
A main coating layer located on the fiber substrate and including a PET-based elastomer; And
PET nonwoven fabric on the main coating layer
Containing,
Eco-friendly airbag fabric. According to claim 1,
The PET-based elastomer comprises a hard segment PET and a soft segment polytetramethylene glycol (PTMG) or polypropylene glycol (PPG),
The weight ratio of the hard segment to the soft segment is 60:40 to 80:20,
Eco-friendly airbag fabric. According to claim 1,
The weight per unit area of the main coating layer is 15 to 120 g/m ² ,
Eco-friendly airbag fabric. According to claim 3,
The weight per unit area of the PET nonwoven fabric is 5 to 50 g/m ² ,
Eco-friendly airbag fabric. According to claim 4,
Further comprising a PET adhesive layer between the fiber substrate and the main coating layer,
Eco-friendly airbag fabric. According to claim 1,
The fiber substrate is a fabric comprising warp yarns and weft yarns,
After performing aging for 408 hours at a temperature of 70±2° C. and relative humidity of 95±2%, the scrub resistance of the eco-friendly airbag fabric measured in accordance with ISO 5981 standard is 1,000 strokes or more in both warp and weft directions,
Eco-friendly airbag fabric. The method of claim 6,
The fiber substrate is a One Piece Woven (OPW) type fabric,
Each of the warp yarns and the weft yarns has a fineness of 210 to 1500 denier,
The density of the warp yarns and the density of the weft yarns is 40 th/inch to 80 th/inch based on one layer of the chamber area of the fabric,
Eco-friendly airbag fabric. Weaving the fiber substrate with PET fibers;
Applying a coating solution containing a PET-based elastomer onto the fiber substrate;
Attaching the PET nonwoven fabric to the coating solution applied on the fiber substrate; And
Cooling the fiber substrate to which the coating solution is applied
Containing,
Eco-friendly airbag fabric manufacturing method. The method of claim 8,
The PET-based elastomer comprises a hard segment PET and a soft segment polytetramethylene glycol (PTMG) or polypropylene glycol (PPG),
The weight ratio of the hard segment to the soft segment is 60:40 to 80:20,
Eco-friendly airbag fabric manufacturing method. The method of claim 8,
The coating solution is applied on the fiber substrate in an amount of 15 to 120 g / m ² ,
Eco-friendly airbag fabric manufacturing method. The method of claim 10,
The weight per unit area of the PET nonwoven fabric is 5 to 50 g/m ² ,
Eco-friendly airbag fabric manufacturing method. The method of claim 11,
Further comprising the step of applying a water-based PET adhesion promoter on the fiber substrate before the coating liquid application step,
Eco-friendly airbag fabric manufacturing method. The method of claim 8,
The cooling step is performed at 0 to 50 ℃,
Eco-friendly airbag fabric manufacturing method.

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