Coated fabric and airbag including the coated fabric

Abstract

The present application relates to a coated fabric and an airbag including the coated fabric.

Description

Technical Field

[0001] Cross-reference to related applications

[0002] This application claims the benefit of Korean Patent Application Nos. 10-2020-0186479, filed on December 29, 2020, and 10-2021-0185280, filed on December 22, 2021, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entirety.

[0003] This application relates to a coated fabric and an airbag including the coated fabric. Background Art

[0004] An airbag is a device that protects vehicle occupants by detecting a collision impact with a sensor, detonating gunpowder, and inflating the gas supplied into the airbag cushion when an external force such as a collision is applied to a vehicle. Since high-temperature and high-pressure gases are generated around the inflator involved in the cushion inflation process, the airbag fabric is damaged, which causes a decrease in the pressure resistance performance of the cushion.

[0005] To prevent this phenomenon, generally, using a high-density woven fabric or increasing the coating weight is considered, but this does not match the trend of miniaturization and lightweight of the airbag cushion and has a problem of deteriorated storage performance (foldability). Summary of the Invention

[0006] Technical Problem

[0007] An object of the present application is to provide a coated fabric capable of solving the above problems caused by the conventional technology.

[0008] Another object of the present application is to provide a coated fabric having excellent foldability.

[0009] Another object of the present application is to provide a coated fabric having excellent heat resistance and durability even at low weight and / or low density.

[0010] Another object of the present application is to provide an airbag including the coated fabric.

[0011] The above objects and other objects of the present application can be fully achieved by the present application described below.

[0012] Technical Solution

[0013] In one embodiment, the present disclosure relates to a coated fabric. Specifically, the coated fabric includes: a fiber substrate (A); and a coating (B) formed on the fiber substrate.

[0014] Regarding the connection relationship between the fiber substrate (A) and the coating (B) that constitutes the coated fabric, the term "forming a coating on the fiber substrate" as used in this specification means forming a film (coating) on the surface of the fiber substrate (and / or the fibers forming the fiber substrate) through a coating-forming material.

[0015] According to an embodiment of the present application, the coating (B) contains an adhesive resin and a filler, wherein the filler exists in a dispersed state in the coating or the adhesive resin. At this time, the filler may include chopped ceramic fibers and / or their aggregates. Specifically, the filler may be agglomerated CBF (ceramic bulk fiber) (i.e., agglomerated CBF).

[0016] In one embodiment, the fiber substrate may include non-ceramic fibers. For example, the fiber substrate may include organic fibers. When the fiber substrate includes ceramic fibers, the properties such as tensile strength, tear strength, and elongation rate that are basically required for the airbag fabric are poor.

[0017] There is no particular limitation on the type of organic fibers contained in the fiber substrate. For example, the fiber substrate may include at least one selected from polyester fibers, aramid fibers, nylon fibers, carbon fibers, polyketone fibers, cellulose fibers, polyolefin fibers, and acrylic fibers.

[0018] In one embodiment, the fineness of the fibers contained in the fiber substrate may be in the range of 450 dtex to 1,100 dtex. Specifically, the lower limit of the fineness may be, for example, 500 dtex or more, 550 dtex or more, or 600 dtex or more, and the upper limit thereof may be, for example, 1000 dtex or less, 900 dtex or less, 800 dtex or less, 700 dtex or less, or 600 dtex or less. When the fineness of the fibers used satisfies the above range, it is beneficial to ensure an appropriate level of lightweight performance and mechanical properties.

[0019] In one embodiment, the fiber substrate may be a woven fabric or a non-woven fabric, or may include one or more of them.

[0020] In one embodiment, the fiber substrate may include one or more layers. For example, the fiber substrate may be a laminate including two or more (woven) fabric layers, a laminate including two or more non-woven layers, or a laminate including one or more (woven) fabric layers and one or more non-woven layers.

[0021] The fiber substrate may have low-density characteristics to ensure the foldability of the (coated) fabric for airbags.

[0022] In one embodiment, the fibrous substrate may be a fabric comprising warp yarns and weft yarns, and the warp density and weft density of the fabric may be in the range of 20 to 55 threads per inch, respectively. Specifically, the lower limit of the density of the warp yarns or weft yarns may be, for example, more than 25 threads per inch, more than 30 threads per inch, more than 35 threads per inch, more than 40 threads per inch, or more than 45 threads per inch, and the upper limit thereof may be, for example, 50 threads per inch or less or 45 threads per inch or less. The density may be measured in accordance with ISO 7211-2 (Section 3.07), but is not particularly limited thereto.

[0023] In the case of conventional techniques, in order to ensure the airtightness of the fabric and prevent damage (or rupture) during the inflation of the airbag, a fibrous substrate woven with at least one of the warp yarns and weft yarns at a high density (e.g., 70 threads per inch) is considered. However, using a high-density fabric as described above not only hinders the weight reduction of the airbag, but also the airbag has poor foldability and storage performance. In the present application, since the low-density fabric as described above is used, the fabric and the airbag can be made lightweight, and it is beneficial to ensure the foldability and storage performance of the airbag. In particular, since the coated fabric of the present application has the following coating, its heat resistance and durability are also excellent.

[0024] As described above, the coating of the coated fabric according to the present application includes ceramic fibers as fillers. Since the ceramic fibers are short fibers and tend to agglomerate with each other in the coating or the composition for forming the coating, they can provide sufficient heat resistance and durability compared to other types of fillers. The ceramic fibers used herein (e.g., ceramic bulk fibers (CBF)) have a stronger tendency to agglomerate. Therefore, compared with conventional ceramic fillers of the same size, i.e., ceramic fillers not in the form of fibers, the ceramic fibers used herein can provide excellent heat resistance (see Evaluation 2 below).

[0025] For example, in an embodiment of the present application, the ceramic fibers have a shape (blocky) in which the chopped fibers are bundled or agglomerated. In the coating, the fibers form a plurality of agglomerates, and these agglomerates are dispersed in the coating or the binder resin.

[0026] As confirmed in the following experimental examples, the examples using a coating in which agglomerates of chopped ceramic fibers are dispersed therein may have more excellent heat resistance and durability than Comparative Example 1 using a large amount of coating and Comparative Example 2 using a double-layer fabric.

[0027] In one embodiment, the size of ceramic fibers, i.e., ceramic bulk fibers (CBF), can range from 0.1 mm to 2.0 mm. At this time, the size of the CBF can be confirmed by a known optical microscope or the like, and can refer to the length of the maximum size among the sizes of the shape of the CBF.

[0028] Specifically, the size of the CBF (ceramic bulk fiber) can be, for example, 0.15 mm or more, 0.20 mm or more, 0.25 mm or more, 0.30 mm or more, 0.35 mm or more, 0.40 mm or more, 0.45 mm or more, 0.50 mm or more, 0.55 mm or more, 0.60 mm or more, 0.65 mm or more, 0.70 mm or more, 0.75 mm or more, 0.80 mm or more, 0.85 mm or more, 0.90 mm or more, 0.95 mm or more, 1.0 mm or more, 1.05 mm or more, 1.10 mm or more, 1.15 mm or more, 1.20 mm or more, 1.25 mm or more, 1.30 mm or more, 1.35 mm or more, 1.40 mm or more, 1.45 mm or more, or 1.50 mm or more. And, the upper limit of the size of the ceramic bulk fiber (CBF) can be, for example, 1.95 mm or less, 1.90 mm or less, 1.85 mm or less, 1.80 mm or less, 1.75 mm or less, 1.70 mm or less, 1.65 mm or less, 1.60 mm or less, 1.55 mm or less, 1.50 mm or less, 1.45 mm or less, 1.40 mm or less, 1.35 mm or less, 1.30 mm or less, 1.25 mm or less, 1.20 mm or less, 1.15 mm or less, 1.10 mm or less, 1.05 mm or less, 1.0 mm or less, 0.95 mm or less, 0.90 mm or less, 0.85 mm or less, 0.80 mm or less, 0.75 mm or less, 0.70 mm or less, 0.65 mm or less, 0.60 mm or less, or 0.55 mm or less. Agglomerating CBFs having the above range can provide excellent heat resistance and durability.

[0029] In an embodiment according to the present application, the degree of dispersion of the aggregates can be represented by the area occupied by the aggregates visually identified in the coating relative to the area of the coating. For example, the aggregates can occupy an area within the range of 1% to 25% of the total area of the coating. This area can be calculated by analyzing the surface of the coating with an optical microscope. Specifically, the degree of dispersion of the filler can be confirmed by the following method: confirm the total area of one surface of the coating, confirm the area occupied by the filler (aggregates) on one surface of the coating, and then calculate the percentage of the area of the coating occupied by the filler (aggregates). At this time, the coating can be divided into a plurality of regions, and the areas measured for each divided region and their ratios can be calculated as an average value (arithmetic mean). There is no particular limitation on the type of optical microscope used in this regard. Specifically, the ratio of the area occupied by the aggregates to the total area of the coating can be, for example, 5% or more or 10% or more, and its upper limit can be, for example, 20% or less or 15% or less.

[0030] In one embodiment, the ceramic fiber may comprise an oxide, nitride, or carbide of at least one selected from Si, Al, Ti, Zr, Ca, and Mg.

[0031] In one embodiment, the ceramic fiber may comprise an oxide of at least one selected from Si, Al, Ti, Zr, Ca, and Mg.

[0032] In one embodiment, the ceramic fiber may comprise SiO2, CaO, and MgO. When the ceramic fiber contained in the coating comprises at least SiO2, CaO, and MgO, excellent heat resistance and durability can be ensured, as confirmed in the following experimental examples.

[0033] In one embodiment, the ceramic fiber may comprise 50 wt% to 60 wt% of SiO2, 20 wt% to 30 wt% of CaO, and 10 wt% to 30 wt% of MgO. When the ceramic fiber contained in the coating comprises SiO2, CaO, and MgO within the above content ranges, excellent heat resistance and durability can be ensured, as confirmed in the following experimental examples.

[0034] In one embodiment, the coating amount of the coating on one layer of the fiber substrate may be 100 gsm (g / m 2)As follows. Specifically, the lower limit of the coating amount can be, for example, 50 gsm or more, 55 gsm or more, 60 gsm or more, 65 gsm or more, 70 gsm or more, 75 gsm or more, 80 gsm or more, 85 gsm or more, 90 gsm or more, or 95 gsm or more. And the upper limit can be, for example, 95 gsm or less, 90 gsm or less, 85 gsm or less, 80 gsm or less, 75 gsm or less, 70 gsm or less, 65 gsm or less, or 60 gsm or less. Generally, it can be expected that as the coating amount increases, the effect caused by the coating increases. However, since the coating of the present application is a coating in which ceramic fiber fillers are dispersed, even when the coating amount is small, higher coating effects (such as heat resistance and durability) can be ensured compared to when no ceramic fiber fillers are used or other types of fillers are used. The coating amount can be measured according to ISO 3801 (Section 3.07), but is not particularly limited thereto.

[0035] In one embodiment, the binder resin contained in the coating can include at least one selected from silicone resins and polyurethane resins. There are no particular limitations on the specific components and properties of the silicone resin or polyurethane resin.

[0036] According to one embodiment of the present application, a silicone resin can be used as the binder resin. In this case, there are no particular limitations on the specific type of material capable of forming the silicone binder resin. For example, the silicone resin can be or can include a silicone elastomer formed by crosslinking or curing a polysiloxane. In addition, a siloxane compound known to be capable of providing a silicone resin through a polyaddition reaction can also be used as the silicone binder resin. In addition, known products such as TCS 7516 or TCS 7537 from Elkem Silicones can also be used to form a coating containing the silicone binder resin.

[0037] In one embodiment, based on 100% by weight of the total coating, the coating can include 20% by weight or less of the filler. At this time, 100% by weight of the total coating can refer to the total content based on the solid content of the binder resin and filler contained in the coating. Or, the total content based on the solid content of the binder resin, filler, and other components (such as additives) can be regarded as 100% by weight of the total coating. When the content of the filler exceeds the above range, the viscosity of the coating solution increases, so the dispersion is uneven, and the effect caused by forming the coating cannot be obtained sufficiently. There are no particular limitations on the lower limit of the content of the filler. For example, it can be 1% by weight or more. Specifically, when considering the effect of improving heat resistance and durability due to the use of the filler, it is preferable to use at least 5% by weight of the filler.

[0038] In one embodiment, the weight (g / m 2 ) of the coated fabric having the above structure can be 350 g / m 2 or less. Specifically, the upper limit of the weight of the coated fabric can be, for example, 340 g / m 2 or less, 330 g / m 2 or less, 320 g / m 2 or less, 310 g / m 2 or less, or 300 g / m 2 or less, and its lower limit can be, for example, 280 g / m 2 or more, 290 g / m 2 or more, 300 g / m 2 or more, or 310 g / m 2 or more. When the weight of the coated fabric exceeds the above upper limit, it is difficult to reduce the weight, and the fabric preparation cost will increase. In addition, when the weight of the coated fabric is less than the above lower limit, the mechanical properties will decrease. The weight of the coated fabric can be measured according to ISO 3801 (Section 3.07), but is not particularly limited thereto.

[0039] In one embodiment, the thickness of the coated fabric having the above structure can be in the range of 0.25 mm to 0.40 mm. At this time, the thickness of the fabric is based on one layer of coated fabric. Specifically, the lower limit of the thickness can be 0.26 mm or more, 0.27 mm or more, 0.28 mm or more, 0.29 mm or more, or 0.30 mm or more, and its upper limit can be, for example, 0.39 mm or less, 0.38 mm or less, 0.37 mm or less, 0.36 mm or less, or 0.35 mm or less. When the thickness is less than the lower limit of the above range, it is difficult to ensure sufficient mechanical properties, and when the thickness exceeds the above range, the foldability is poor. The thickness can be measured according to ISO 5084 (Section 3.09), but is not particularly limited thereto.

[0040] In another embodiment according to the present application, a method for preparing a coated fabric is provided.

[0041] Specifically, the method for preparing the coated fabric includes: coating a composition containing an adhesive resin and a filler onto a fiber substrate, and then curing the coated composition.

[0042] In this case, the filler contains chopped ceramic fibers or their aggregates. In addition, the details of the adhesive resin and the filler are the same as those above, so they will be omitted.

[0043] Coating can be carried out so that a film (coating) of the composition can be formed on the surface of the fibrous substrate (and / or the fibers forming the fibrous substrate). In this regard, there is no particular limitation on the method of coating the composition onto the fibrous substrate, and it can be appropriately carried out according to known methods.

[0044] In one embodiment, curing can be carried out at room temperature or a higher temperature. Room temperature refers to the temperature in a state where no special temperature increase or decrease is carried out, and it refers to a temperature of about 15°C to 35°C. In addition, a temperature greater than or equal to room temperature is a temperature at which temperature increase is carried out, and it can refer to a temperature exceeding 35°C, for example, a temperature in the range of 40°C to 300°C. There is no particular limitation on the curing time at the above temperature, and curing can be carried out, for example, for several seconds (sec) to several tens of minutes (min).

[0045] In yet another embodiment according to the present application, an airbag is provided. The airbag includes the above-mentioned coated fabric.

[0046] Details regarding the structure and properties of the coated fabric included in the airbag are the same as those described above, and thus the description thereof will be omitted.

[0047] In one embodiment, the coated fabric can be used as a reinforcing fabric for an airbag. At this time, the reinforcing fabric refers to a structure that is lined to prevent damage to the airbag cushion fabric in the inflation part of the airbag, etc. In this regard, a structure in which a reinforcing fabric is lined in the structure of the airbag can be referred to as a main panel. Therefore, the airbag is configured to include: a main panel; and a reinforcing fabric adhered to at least a part of the area of the main panel.

[0048] In one embodiment, the area of the main panel can be greater than or equal to the area of the reinforcing fabric.

[0049] In one embodiment, the main panel can include a fabric containing at least one selected from polyester fiber, aramid fiber, nylon fiber, carbon fiber, polyketone fiber, cellulose fiber, polyolefin fiber, and acrylic fiber.

[0050] In one embodiment, the main panel can include a fabric having a density of 45 to 55 picks per inch in the warp and weft.

[0051] In one embodiment, the main panel can have a coating. The coating of the main panel can include commonly known silicone resin or polyurethane resin, but is not limited thereto. When coating, the coating amount can be 20 gsm to 40 gsm, but is not particularly limited thereto.

[0052] Beneficial effects

[0053] According to the present application, even considering the weight reduction of the airbag and the coated fabric, as well as the foldability and storage performance of the airbag cushion, when forming a low-density coating on a low-weight fabric, a coated fabric for an airbag with excellent heat resistance and durability can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] FIG. 1 schematically shows an inflator damage evaluation method and its results. Specifically, Figure 1a is an image schematically showing a method of installing an inflator and a fabric for evaluation, Figure 1b , Figure 1c and Figure 1d are images obtained by photographing the heat resistance evaluation results of Example 1, Comparative Example 1, and Comparative Example 2, respectively.

[0055] Figure 2 is an image of the surface of a coating according to an embodiment of the present application taken with an optical microscope. It can be confirmed that fillers in the form of agglomerates are visually identified in the darker shadows. Figure 2 The size of the fillers confirmed in is in the range of 0.1 mm to 2.0 mm.

[0056] FIG. 3 is a graph showing the heat resistance and durability evaluation results (hot-rod evaluation) according to the filler type and a comparison of the agglomeration characteristics. Specifically, Figure 3a is an experimental result showing that CBF (ceramic bulk fiber) provides better heat resistance and durability through a hot-rod evaluation. In addition, Figure 3b is a schematic diagram for explaining why the heat resistance and durability vary depending on the filler type and agglomeration characteristics. As Figure 3b shown in , since CBF has a stronger tendency to agglomerate compared to other ceramic fillers, damage to the coating-forming resin can be suppressed under high-temperature / high-pressure conditions. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] Hereinafter, the functions and effects of the present invention will be described in more detail with reference to specific embodiments of the present invention. However, these embodiments are for illustrative purposes only, and the scope of the present invention is not limited in any way.

[0058] Examples and comparative examples

[0059] Example 1

[0060] Preparation of the coating composition: Prepare a composition comprising TCS 7516 from Elkem Silicones as an organosilicon binder resin and ceramic bulk fibers (ceramic fibers composed of 55 wt% SiO2, 25 wt% CaO, and 20 wt% MgO). At this time, adjust the content of the ceramic bulk fibers to be about 10 wt% in the finally cured coating.

[0061] Preparation of the coated fabric: Prepare a fabric from PET fibers with a fineness of 550 dtex. Specifically, prepare a fabric (1 layer) with a fabric density of 46×46 threads per inch (warp×weft), and coat the prepared composition on the fabric at a level of about 87 gsm. Then, cure it at a temperature of 160 °C to 190 °C for at least 1 minute and 30 seconds using a hot air chamber to obtain a woven fabric. The weight of the prepared coated fabric is 315 g / m 2 , and the thickness is about 0.33 mm (see Figure 2 ).

[0062] Comparative Example 1

[0063] Preparation of the coating composition: Prepare TCS 7517 from Elkem Silicones as a siloxane binder resin.

[0064] Preparation of the coated fabric: Prepare a fabric from PA66 fibers with a fineness of 470 dtex. Specifically, prepare a fabric (1 layer) with a fabric density of 46×46 threads per inch (warp×weft). Then, coat the prepared coating composition on the prepared fabric at a level of about 122 gsm (the coating amount is about 50 gsm more than that in Example 1), and then cure it under the same conditions as in Example 1. The weight of the prepared coated fabric is 308 g / m 2 , and the thickness is about 0.33 mm.

[0065] Comparative Example 2

[0066] Preparation of the coating composition: Prepare DC3730 from Dow Corning as a polyurethane binder resin.

[0067] Preparation of the coated fabric: Prepare a fabric from PA66 fibers with a fineness of 470 dtex. Specifically, prepare a fabric (2 bonded layers. Different from Example and Comparative Example 1, a double-layer fabric is used) with a fabric density of 112×96 threads per inch (warp×weft). Then, coat the prepared composition on the fabric at a level of about 69 gsm. The weight of the prepared coated fabric is 512 g / m 2 , and the thickness is about 0.66 mm.

[0068] Evaluation 1: Evaluation of heat resistance durability of coated fabric

[0069] The heat resistance of the coated fabrics prepared in the examples and comparative examples was evaluated by the following methods.

[0070] 1. HOT-ROD evaluation

[0071] Specifically, a columnar rod (10 mm in diameter, 80 mm in length, 50 g in weight) was prepared, and the rod was heated to the desired 600 °C and brought into contact with the coated fabric. Then, the time (seconds) until the rod completely melted the fabric and then dropped was measured, and the results are shown in Table 1 below.

[0072] 2. Inflator damage evaluation

[0073] The heat shield fabric was wrapped as a single layer inside the fixture of the dual inflator for DAB (KSS), and the coated fabrics of the examples and comparative examples were wrapped in 6 layers to prepare specimens (see Figure 1a ). Then, the process of airbag deployment was simulated such that high-temperature and high-pressure gas was applied to the specimens. At this time, the high-temperature and high-pressure gas was controlled to be applied at a maximum pressure of 180 Kpa to 270 Kpa for 40 ms to 80 ms.

[0074] Then, the number (n) of damaged fabrics in the five-layer coated fabric and the number (m) of holes found in these damaged fabrics were measured. The weighted value of n was set to 10, the weighted value of m was set to 1, and the evaluation results were digitized as follows. The lower the damage score, the better the heat resistance.

[0075] Damage score = (n × 10) + (m × n × 1)

[0076] [Table 1]

[0077]

[0078] Evaluation 2: Comparison of heat resistance and durability of fillers

[0079] As Figure 3a shown, the filler type of the coated fabric prepared in Example 1 was changed, and the above HOT-ROD evaluation results were compared. Specifically, the content of the filler in the coating was equally applied at 5 wt%, and HOT-ROD evaluations were performed for the cases of using CBF (ceramic bulk fiber), conventional ceramic fillers (mica (D50 number distribution size of about 40 um), silica (D50 number distribution size of about 20 um to 30 um), talc (D50 number distribution size of about 20 um to 30 um), and CF (carbon fiber) fillers (size of about 2 - 3 mm). The Y-axis results are the arithmetic mean (unit: seconds) after about 10 evaluations.

Claims

1. A coated fabric, comprising: Fiber substrate (A); and a coating (B) formed on the fiber substrate, wherein the coating comprises an adhesive resin and a filler, wherein the filler is dispersed in the coating, wherein the filler comprises aggregates of chopped ceramic fibers, and the chopped ceramic fibers have a size in the range of 0.1 mm to 2.0 mm, wherein the coating amount of the coating on one layer of the fiber substrate is 50 gsm to 100 gsm, and Among them, the weight of the coated fabric is 280 g / m 2 to 350 g / m 2 .

2. The coated fabric according to claim 1, wherein: The ceramic fiber comprises at least one oxide, nitride or carbide selected from Si, Al, Ti, Zr, Ca and Mg.

3. The coated fabric according to claim 2, wherein: The ceramic fiber comprises at least one oxide selected from Si, Al, Ti, Zr, Ca and Mg.

4. The coated fabric according to claim 3, wherein: The ceramic fiber comprises SiO2, CaO and MgO.

5. The coated fabric according to claim 4, wherein: The ceramic fiber comprises 50 wt% to 60 wt% of SiO2, 20 wt% to 30 wt% of CaO and 10 wt% to 30 wt% of MgO.

6. The coated fabric according to claim 1, wherein: The adhesive resin comprises at least one selected from polyurethane resin and silicone resin.

7. The coated fabric according to claim 1, wherein: Based on 100 wt% of the entire coating, the coating comprises 20 wt% or less of the filler.

8. The coated fabric according to claim 1, wherein: The fiber substrate comprises at least one selected from polyester fiber, aramid fiber, nylon fiber, carbon fiber, polyketone fiber, cellulose fiber, polyolefin fiber and acrylic fiber.

9. The coated fabric according to claim 8, wherein: The fineness of the fibers comprised in the fiber substrate is in the range of 450 dtex to 1,100 dtex.

10. The coated fabric according to claim 8, wherein: The fiber substrate is a fabric comprising warp yarns and weft yarns, The warp density and weft density of the fabric are respectively in the range of 20 ends per inch to 55 ends per inch.

11. The coated fabric according to claim 1, wherein: The thickness of the coated fabric is 0.25 mm to 0.40 mm.

12. A method for preparing a coated fabric, comprising: Coating a coating composition comprising an adhesive resin and a filler onto a fiber substrate, and then curing the coated composition to form a coating, wherein the filler comprises aggregates of chopped ceramic fibers, and the chopped ceramic fibers have a size in the range of 0.1 mm to 2.0 mm, Wherein, the coating amount of the coating on a layer of fiber substrate is 50 gsm to 100 gsm, and wherein, the weight of the coated fabric is 280 g / m 2 to 350 g / m 2 .

13. An airbag, comprising the coated fabric according to claim 1.

Images