JP2009090905A - Safety airbag cloth product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a safety airbag cloth and its product. <P>SOLUTION: The manufacturing method for the safety airbag cloth is provided with a step for forming the airbag cloth in which a plastic material 11 is poured into a flat film extrusion machine, forms a TPU film 12 so as to be enlarged in all directions, a non-elastic film is formed after a thermoplastic elastic film is mainly formed, and further, the thermoplastic elastic film and the non-elastic film are adhered to each other; a step in which an airbag outer shape is cut 13, the obtained airbag cloth is cut to the required airbag outer shape and size by a cutting machine, and further an inflator hole is formed on a part of the airbag cloth; and a step in which high frequency processing is performed 14, the airbag cloth after cutting the airbag cloth having the inflator hole are overlapped and superposed, it is set in a metal die of a high frequency machine and is thermally bonded/fused by the high frequency machine, thermal fusion lines are formed on peripheral edges of the two airbag clothes, the two airbag clothes are welded, and simultaneously, the safety airbag is molded. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention relates to a safety airbag fabric product, and more particularly to a TPU film safety airbag fabric product.

    As the quantity and speed of automobiles increase, vehicle safety issues are also regarded as important by consumers and automakers, and in order to protect passengers in automobiles from being damaged or killed by accidents, the general public As an automobile, for example, devices such as seat belts, safety airbags, anti-summarizing seats and active head cushions are provided, and among them, safety airbags are the most advanced and effective, It is a car safety device that can protect the chest, and when the car is traveling at high speed, passengers and articles in the car also move quickly, so when the car body impacts on a fixed object, its own The impact force due to kinetic energy is absorbed by the vehicle body that is deformed and distorted, so it can be stopped in a short time, It is easy to stop after impacting a fixed object in the car, causing severe injury. When wearing a seat belt, naturally, the energy is shared by the extension of the seat belt, protecting the customer from intense impact. However, when the speed is too fast or the impact object is too hard, if the energy is larger than what the seat belt can load, the safety of the passenger cannot be protected without a safety airbag.

    A safety airbag system is basically composed of members such as sensors, gas generators, saucers, airbag cloths and lid plates, and has a complicated structure. When the gas generating agent burns, the airbag fabric is inflated by instantly generating a large amount of gas, thereby providing cushioning protection for the driver and occupant, and when in shock, Protect human safety from fixed objects. FIGS. 5 and 6 show an existing method for producing a safety airbag cloth and its product, mainly after processing of nylon 66 plastic material 31 經 fagoting 32, and reweaving 33 uniform piece of airbag cloth 41, the cloth material. Applying top silicone (neo) or neoprene (rubber) 34, transparent leather cutting machine 將 air bag cloth 41 after cutting bag mold 35 demand, then re-bagging air bag cloth 41, common use sewing machine In the periphery of the airbag cloth 41, the outer sewing 36 sewing line 42, the molding of the immediately completed actual safety airbag 4, the safety airbag 4 engagement handle cover plate, a slightly correlated part and the charger assembly Single safety airbag system, on side-by-side vehicles, sensor contact, when this vehicle is in operation, safety of passengers in the protection more than the safety airbag system.

    The plastic material 31 made of nylon 66 requires the production of the safety airbag 4 through a number of processes such as fatting 32, weaving 33, leather cutter cutting, sewing machine sewing, and the process is complicated. It takes time, and the production speed is limited. Also, since it requires a lot of manpower and physical strength (machine type), the cost is high, and the fabric of the plastic material 31 that is nylon 66 cannot be decomposed naturally. When it is discarded, there is a risk of polluting the environment, and the material cost and production cost of the plastic material 31 that is nylon 66 are relatively high, and its value advantage is lost in the market, and the safety airbag 4 but the competitiveness in the industry is reduced.

    A safety airbag fabric product according to the present invention is a safety airbag formed by sequentially processing plastic materials through processes such as TPU film and airbag outer die cutting and high-frequency processing. It is injected into a film extruder, a TPU film is formed so as to expand in all directions, a thermoplastic elastic film is mainly formed, then an inelastic film is formed, and the thermoplastic elastic film and the inelastic film are A step of forming an airbag cloth adhered to each other, cutting the airbag outer mold, and cutting the obtained airbag cloth into a required airbag outer mold and size with a cutting machine; The step of forming the inflator hole in a part of the airbag cloth and the airbag cloth having the inflator hole and the airbag cloth after the high frequency processing and cutting are overlapped and overlapped, Gold Set to, heat-fusing with a high-frequency machine, heat fusion lines are formed on the periphery of the two airbag fabrics, the two airbag fabrics are welded, and at the same time a safety airbag is molded A process.

The safety airbag fabric product according to the present invention has the following effects.

    1. According to the present invention, a finished product of a safety airbag is formed simply by producing a plastic material on a TPU film airbag cloth, cutting and high-frequency heat welding, and the manufacturing method is quick and simple. In addition, since the production time is short and it is integrally molded, human power and physical strength can be saved.

    2. In the present invention, since the thermoplastic elastic film is made of thermoplastic polyurethane TPU which is an environmental protection ring material, it does not adversely affect environmental protection when discarded.

    3. Since the cost of the material of the thermoplastic polyurethane TPU is low, the present invention has a price advantage in the market and the competitiveness is improved in the industry.

The invention of claim 1 is a safety airbag formed by sequentially processing a plastic material through processes such as cutting of a TPU film and an airbag outer mold and high-frequency processing, and the plastic material is put into a flat membrane extruder. After injecting, forming a TPU film so as to expand in all directions, mainly forming a thermoplastic elastic film, then forming an inelastic film, and the thermoplastic elastic film and the inelastic film are adhered to each other. The process of forming the airbag cloth, and the airbag outer mold is cut, and the obtained airbag cloth is cut into a required airbag outer mold and size by a cutting machine, and a part of the airbag cloth is cut. The process of forming the inflator hole in the airbag cloth, and the airbag cloth having the inflator hole after being cut and cut at high frequency are overlapped with each other to form a mold for a high frequency machine. Set and high lap A machine is thermocompression-bonded, a heat fusion line is formed at the periphery of the two airbag fabrics, the two airbag fabrics are welded, and a safety airbag is molded at the same time. This is a safety airbag fabric product characterized by the above.

The invention according to claim 2 is the safety airbag fabric product according to claim 1, wherein the plastic material is injected into a biaxial flat membrane extruder.

The invention according to claim 3 is the safety airbag fabric product according to claim 1, wherein the plastic material is injected into a single-axis flat membrane extruder.

The invention according to claim 4 is the safety airbag fabric product according to claim 1, wherein the thermoplastic elastic membrane is a thermoplastic polyurethane TPU.

In the invention of claim 5, the non-elastic film is made of low density polyethylene LDPE, high density polyethylene HDPE, linear low density polyethylene LLDPE, polyethylene terephthalate PET, amorphous PET copolymer PETG, polypropylene PP, polybutylene terephthalate PBT, polyamide PA. 2. The safety airbag fabric product according to claim 1, comprising: polycarbonate PC, polystyrene PS, liquid crystal polymer LCP, polyvinyl butyral PVB, and polyvinyl chloride PVC.

The invention according to claim 6 is the safety airbag fabric product according to claim 1, wherein the thermoplastic elastic film and the non-elastic film are adhered to each other by the adhesive layer.

In the invention of claim 7, the adhesive layer comprises unsaturated polyester UP, epoxy resin EPOXY, polyurethane PU, polyamide PA, ethylene vinyl acetate copolymer EVA, ethylene-methacrylic acid copolymer EMA, ethylene-butyl acrylate copolymer EBA. , Ethylene-hydroacrylic acid copolymer EAA, ethylene-hydroacrylic acid copolymer EAA, ethylene-ethyl acrylate copolymer EEA, methyl methacrylate MMA, silicon SILICONE, rubber RUBBER, ionomer resin or ethylene acid polymer resin The safety airbag fabric product according to claim 6.

The invention according to claim 8 is the safety airbag fabric product according to claim 6, wherein the adhesive layer is formed by adhering the thermoplastic elastic film and the inelastic film at 200 ° C. or less. is there.

The invention according to claim 9 is a step of performing corona treatment in order that the step of adhering the thermoplastic elastic film and the non-elastic film increases the surface adhesion to one surface of the thermoplastic elastic film or the non-elastic film. And applying an adhesive layer to the corona-treated surface of the thermoplastic elastic film or inelastic film, and finally adhering the thermoplastic elastic film and the inelastic film with the adhesive layer. The safety airbag fabric product according to claim 6, wherein the safety airbag fabric product is provided.

The invention according to claim 10 is characterized in that a silicon mold release agent or a fluorine mold release agent is used because the safety airbag can be smoothly deployed when the safety airbag explodes. It is a safety airbag fabric product.

The invention according to claim 11 is the safety airbag fabric product according to claim 1, wherein the airbag fabric is cut into a circular shape.

The invention of claim 12 is characterized in that the airbag fabric is cut into different shapes, thermocompression-bonded, and fixed to the side of the roof of the automobile to form a curtain-type safety airbag. The safety airbag fabric product according to claim 1.

    Hereinafter, the objects, features, and effects of the present invention will be described in detail with reference to the drawings.

    With reference to FIG. 1 to FIG. 4, the plastic material 11 is molded into the safety airbag 2 sequentially through processes such as the TPU film 12, the airbag outer die cutting 13, and the high frequency processing 14.

    First, the plastic material 11 is injected into a biaxial flat membrane extruder (or a single-shaft flat membrane extruder), the TPU film 12 is formed so as to expand in all directions, and the thermoplastic elastic membrane 211 is mainly formed. After that, the non-elastic film 212 is formed, and the thermoplastic elastic film 211 and the non-elastic film 212 are adhered to each other by the adhesive layer 213 to form the airbag cloth 21 (as shown in FIG. 2). Further, the thermoplastic elastic film 211 is a thermoplastic polyurethane TPU, and the non-elastic film 212 is a low density polyethylene LDPE, a high density polyethylene HDPE, a linear low density polyethylene LLDPE, a polyethylene terephthalate PET, an amorphous PET copolymer PETG, or a polypropylene PP. , Polybutylene terephthalate PBT, polyamide PA, polycarbonate PC, polystyrene PS It is one of the materials such as liquid crystal polymer LCP, polyvinyl butyral PVB and polyvinyl chloride PVC. Adhesive layer 213 is made of unsaturated polyester UP, epoxy resin EPOXY, polyurethane PU, polyamide PA, ethylene vinyl acetate copolymer EVA, ethylene-methacrylic acid. Acid copolymer EMA, ethylene-butyl acrylate copolymer EBA, ethylene-hydroacrylic acid copolymer EAA, ethylene-hydroacrylic acid copolymer EAA, ethylene-ethyl acrylate copolymer EEA, methyl methacrylate MMA, Silicone SILICON, rubber RUBBER, ionomer resin, ethylene acid polymer resin, and the like, and when the thermoplastic elastic film 211 and the non-elastic film 212 are not adhered to each other, the adhesive layer 213 causes the thermoplastic elastic film 11 and sticking and a non-elastic film 212, which is performed in the following Celsius 200 ° C..

    The airbag outer mold cutting 13 cuts the obtained airbag cloth 21 into an airbag outer mold and size required by a cutting machine, and is generally cut into a circular shape, or a part of the airbag. An inflator hole 22 is formed in the cloth 21.

    In the high-frequency processing 14, the cut air bag cloth 21 and the air bag cloth 21 having the inflator holes 22 are overlapped and set, and set in a mold of a high-frequency machine. Then, the heat fusion line 23 is formed on the periphery of the two airbag cloths 21, the two airbag cloths 21 are welded, and at the same time, the safety airbag 2 is molded (as shown in FIG. 3). The safety airbag 2 is combined with a safety airbag system, mounted on a vehicle, and connected to a sensor to match the handle lid plate and the charger and other parts, so when the vehicle crashes The safety airbag system can be triggered to keep passengers safe.

    About the manufacturing method and the product of the safety airbag cloth concerning the above-mentioned invention, the fireproof test, the heat aging test, the humidity aging test, the circulation aging test, the TPU film stretching experiment, etc. can get.

1. Flame resistance test:
FMVSS No. 302 is used as a reference.
(1) Sample adjustment 21 ° C. × 50% RH × 24 hrs.
(2) Sample width 102 mm × length 356 mm, thickness 13 mm or less.
(3) Bunsen burner inner diameter 10 mm, flame height 38 mm.
(4) Bunsen burner crater center is located 190mm below the center of the test end and burns for 15 seconds.
(5) Time is started after burning 38 mm from the start end of the sample, and the time when the sample burns up to 38 mm from the clamping end is recorded, and the flame disappears before reaching the position. Record the time until the flame disappears.
(6) Combustion rate calculation B = 60 × D / T
B = burning rate, unit mm / min
D = burning distance, unit mm
T = time of combustion D, unit seconds (7) Result: TPU is selected because combustion stops by 38 mm.
Even if an additive is not added to the film itself, a flame resistance effect can be obtained.

2. Thermal aging test:
The TPU film has a maintenance rate of 80% in the maximum tensile stress after heat aging treatment, and the key point is TPU having a hardness of 95A and a molecular weight of 25,000.

3. Humidity aging test:
Since TPU is selected as a fat and is easy to hydrolyze, the maximum tensile stress can be maintained at the above-mentioned maintenance rate by adding a water-resistant anti-decomposition agent. It drops about a part.

4). Circulation aging test:
(1) Circulation aging test is based on ASTM D5427 1A,
The TPU film has a maintenance ratio of a maximum tensile stress after the circulation aging 1A treatment of close to 80%, and the key point is to select TPU having a hardness of 90A and a molecular weight of 20000.
(2) Circulation aging test is based on ASTM D5427 1B,
The TPU film has a good maintenance rate with respect to the maximum tensile stress after the circulation aging 1B treatment, and the key point is to select a TPU having a hardness of 90A and a molecular weight of 20000.
(3) Circulation aging test is based on ASTM D5427 1C,
The TPU film has a good retention rate with respect to the maximum tensile stress after the cyclic aging 1C treatment, and the key point is to select a TPU having a hardness of 90A and a molecular weight of 20000.

5). TPU film stretching test results:
Stretching was reduced from 3 times to 2 times, because the TPU film is an elastic body. Therefore, when only 2 times are stretched and the effect of 2 times is seen from the maximum tensile stress, the maximum stretch rate Is reduced to 2.64 times, and the effect after these stretches is a necessary property of the film safety airbag. When the maximum tensile stress is doubled, it is advantageous for improving the safety, and the maximum The reduction of the stretch rate by a factor of 2 is advantageous for the explosion deployment of the film safety airbag.

    6). The TPU film has little change in size after the heat aging test, the humidity aging test and the circulation aging test, and the key point is to select a TPU having a hardness of 95A and a molecular weight of 25,000.

    7. TPU film may stick to each other at high temperature, and in order to maintain strength, the method of adding an inorganic substance is unsuitable, and even if talc powder is added, the development of TPU film at high temperature If a silicon release agent or a fluorine release agent is used without any help, it is advantageous to smoothly deploy the safety airbag after it has exploded.

    Further, the adhesion step between the thermoplastic elastic film 211 and the non-elastic film 212 is a step of performing a corona treatment to increase the surface adhesion to one surface of the thermoplastic elastic film 211 or the non-elastic film 212. Then, the step of applying the adhesive layer 213 to the corona-treated surface of the thermoplastic elastic film 211 or the non-elastic film 212, and finally, the adhesive layer 213 causes the thermoplastic elastic film 211 and the non-elastic film 212 to adhere to each other. And a step of performing.

    Further, the airbag fabric 21 may be cut into different shapes, thermocompression-bonded, and fixed to the roof side of the automobile to form a curtain-type safety airbag (as shown in FIG. 4).

The above-described safety airbag fabric product has the following advantages.
1. The plastic material 11 is produced on the airbag cloth 21 of the TPU 12, cut, and heat-welded at a high frequency to form the safety airbag 2. The manufacturing method is fast and simple. Because the production time is short and it is an integral molding, human power and physical strength can be saved.
Second, since the thermoplastic elastic film 211 is made of thermoplastic polyurethane TPU, which is an environmental protection material, there is no possibility of adversely affecting the environment when the safety airbag 2 is discarded.
Third, since the cost of the material of the thermoplastic polyurethane TPU is low, and manpower and physical strength can be saved when manufacturing, the competitiveness is relatively improved in the market.

The above is merely a better embodiment of the present invention, and the present invention is not limited thereby. All modifications are within the scope of the claims of the present invention.

Block diagram of manufacturing process of airbag fabric product of the present invention Sectional view of airbag fabric according to the present invention External view of a safety airbag according to the present invention Another embodiment of the safety airbag according to the present invention Conventional block flow diagram External view of conventional safety airbag

Explanation of symbols

Invention 11 Plastic material 12 TPU film 13 Airbag outer die cutting 14 High-frequency processing 2 Safety airbag 21 Airbag cloth 211 Thermoplastic elastic film 212 Non-elastic film 213 Adhesive layer 22 Inflator hole 23 Heat fusion wire Conventional 31 Plastic material 32 Fago Ting 33 Weaving 34 Silicon and neoprene application 35 Bag cutting 36 Sewing 4 Safety airbag 41 Airbag cloth 42 Sewing line

Claims (12)

A plastic material is a safety airbag molded through a process such as cutting of a TPU film and an airbag outer mold and high frequency processing in order,
A plastic material is injected into a flat film extruder, a TPU film is formed so as to expand in all directions, a thermoplastic elastic film is mainly formed, an inelastic film is then formed, and the thermoplastic elastic film and The inelastic membrane is adhered to each other to form an airbag cloth;
The airbag outer mold is cut, and the obtained airbag cloth is cut into a necessary airbag outer mold and size by a cutting machine, and an inflator hole is formed in a part of the airbag cloth. Process,
After the high-frequency processing and cutting, the airbag fabric and the airbag fabric having the inflator hole are overlapped and overlapped, set in a mold of a high-frequency machine, fused by thermocompression bonding with the high-frequency machine, A safety air bag characterized in that a heat fusion line is formed on the periphery of one air bag cloth, the two air bag cloths are welded, and a safety air bag is molded at the same time. Cloth products. The safety airbag fabric product according to claim 1, wherein the plastic material is injected into a biaxial flat membrane extruder. The safety airbag fabric product according to claim 1, wherein the plastic material is injected into a uniaxial flat membrane extruder. The safety airbag fabric product according to claim 1, wherein the thermoplastic elastic film is a thermoplastic polyurethane TPU. Non-elastic film is low density polyethylene LDPE, high density polyethylene HDPE, linear low density polyethylene LLDPE, polyethylene terephthalate PET, amorphous PET copolymer PETG, polypropylene PP, polybutylene terephthalate PBT, polyamide PA, polycarbonate PC, polystyrene PS, The safety airbag fabric product according to claim 1, comprising liquid crystal polymer LCP, polyvinyl butyral PVB and polyvinyl chloride PVC. The safety airbag fabric product according to claim 1, wherein the thermoplastic elastic membrane and the non-elastic membrane are adhered to each other by the adhesive layer. Adhesive layer is unsaturated polyester UP, epoxy resin EPOXY, polyurethane PU, polyamide PA, ethylene vinyl acetate copolymer EVA, ethylene-methacrylic acid copolymer EMA, ethylene-butyl acrylate copolymer EBA, ethylene-hydroacrylic acid copolymer A polymer EAA, an ethylene-hydroacrylic acid copolymer EAA, an ethylene-ethyl acrylate copolymer EEA, methyl methacrylate MMA, silicon SILICON, rubber RUBBER, an ionomer resin or an ethylene acid polymer resin. Item 7. A safety airbag fabric product according to Item 6. The safety airbag fabric product according to claim 6, wherein the adhesive layer is formed by adhering the thermoplastic elastic film and the inelastic film at 200 ° C. or less. The step of adhering the thermoplastic elastic film and the non-elastic film increases the surface adhesion to one surface of the thermoplastic elastic film or the non-elastic film, so that the corona treatment is performed, and the thermoplastic elasticity A step of applying an adhesive layer to a corona-treated surface of a film or an inelastic film, and finally, adhering the thermoplastic elastic film and the inelastic film with the adhesive layer are provided. Item 7. A safety airbag fabric product according to Item 6. 2. The safety airbag fabric product according to claim 1, wherein a silicone release agent or a fluorine release agent is used for the safety airbag because it can be smoothly deployed when the safety airbag explodes. The safety airbag fabric product according to claim 1, wherein the airbag fabric is cut into a circular shape. The air bag cloth is cut into different shapes, thermocompression-bonded, and fixed to a side of an automobile roof to form a curtain-type safety air bag. Safety airbag cloth products.