CN218020589U - Pressure-maintaining one-step forming safety airbag composite fabric - Google Patents
Pressure-maintaining one-step forming safety airbag composite fabric Download PDFInfo
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- CN218020589U CN218020589U CN202221041216.9U CN202221041216U CN218020589U CN 218020589 U CN218020589 U CN 218020589U CN 202221041216 U CN202221041216 U CN 202221041216U CN 218020589 U CN218020589 U CN 218020589U
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Abstract
The utility model discloses a pressurize one shot forming air bag compound fabric, include: a double-layer fabric, the interior of which comprises a balloon cavity; the first bonding layers are coated on the front side and the back side of the double-layer fabric; a second adhesive layer disposed outside the first adhesive layer; the film layer is arranged on the outer side of the second bonding layer; a first adhesive layer is compounded outside the double-layer fabric, so that the first adhesive layer can partially permeate into the double-layer fabric, a second adhesive layer is compounded on the first adhesive layer, a film layer is compounded on the second adhesive layer, and the pressure maintaining effect of the air bag is improved through a multi-layer compound structure.
Description
Technical Field
The utility model relates to an air bag, especially a pressurize one shot forming air bag compound fabric.
Background
The fabric of the double-layer airbag of the automobile is a main material for manufacturing the curtain type automobile airbag, and when the side surface of the automobile collides, the curtain type airbag on the side surface can be unfolded to protect personnel on the automobile, so that the curtain type airbag is required to have pressure retention property, and the double-layer airbag fabric needs to be coated during processing, so that the air permeability of the fabric is reduced.
The general practice in the industry is to reduce the air permeability of the cloth by a silica gel coating mode, the silica gel coating of the air bag fabric uses hot air to heat the adhesive surface in the processing process, so the energy consumption in the production process is high, 3-4 GJ heat energy needs to be consumed in one hour in the silica gel coating processing, and when the one-step forming air bag fabric is coated, the width of the fabric is 2.3-3 m, suture tissues and cavity tissue lug tissues are distributed on the double-layer fabric according to the size requirement of air bag accessories, the fabric surface is not flat due to the change of the texture, when the silica gel is coated by a knife, the coating tension is not stable due to the non-flat fabric surface, the gram weight of the coating is not stable, the coating thickness is not uniform, the pressure maintaining performance of the silica gel coating air bag fabric is not stable, and the stable pressure is difficult to provide a buffer effect when the air bag is used.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pressurize one shot forming air bag compound fabric can effectively solve above-mentioned problem.
The utility model discloses a realize like this:
a pressure-maintaining one-shot airbag composite fabric comprising: a double-layer fabric, the interior of which comprises a balloon cavity;
the first bonding layers are coated on the front surface and the back surface of the double-layer fabric;
a second adhesive layer disposed outside the first adhesive layer;
and the film layer is arranged on the outer side of the second bonding layer.
Further, the first bonding layer comprises an inner connecting layer which penetrates into the front side and the back side of the double-layer fabric, and an inner surface layer which is coated on the front side surface and the back side surface of the double-layer fabric.
Furthermore, the first bonding layer and the second bonding layer are both moisture-cured reaction type polyurethane thermosol
Furthermore, the gram weight of the first adhesive layer and the second adhesive layer is 15-40 g/square meter.
Furthermore, the gram weight of the double-layer fabric is 340-500 g/square meter, and the breaking strength of the single-layer fabric forming the double-layer fabric is more than 2500N/5cm.
Further, the film layer is any one of a TPEE film, a PU film, a TPU film and a PA film.
Furthermore, the thickness of the film layer is 0.01-0.08 mm, and the elongation at break is more than 300%.
Further, the double-layer fabric is any one of high-strength polyester fibers or high-strength nylon fibers.
Furthermore, the air sac cavity is a double-layer plain weave
The pressure-maintaining one-step forming safety airbag composite fabric is formed by applying a pressure-maintaining safety airbag composite fabric forming method, and comprises the following steps of:
s1; weaving the fabric into a double-layer airbag fabric with a cavity by using a jacquard machine, and maintaining the humidity of a production environment at 60-80%;
s2; preheating a double-layer airbag fabric to 80-120 ℃, heating a film layer to 80-120 ℃, and heating moisture curing reaction type polyurethane hot melt adhesive to 70-120 ℃;
s3; carrying out corona treatment on the double-layer airbag fabric;
s4, performing primary filtration; coating the heated moisture curing reaction type polyurethane hot melt adhesive on the front surface of the double-layer airbag fabric, wherein the gram weight of the heated moisture curing reaction type polyurethane hot melt adhesive is 8-20 g/square meter, coating the heated moisture curing reaction type polyurethane hot melt adhesive on a film layer, and laminating and compounding the heated moisture curing reaction type polyurethane hot melt adhesive and the film layer, wherein the gram weight of the film layer is 10-25 g/square meter;
s5; coating the heated moisture curing reaction type polyurethane hot melt adhesive on the reverse side of the double-layer airbag fabric, wherein the gram weight is 8-20 g/square meter, coating the heated moisture curing reaction type polyurethane hot melt adhesive on a film layer, the gram weight is 10-25 g/square meter, and laminating and compounding the two;
s6; and cooling the double-layer airbag fabric to 15-30 ℃, rolling the double-layer airbag fabric, and standing the double-layer airbag fabric for 24 hours at room temperature.
As a further improvement, the power of the corona treatment is 2-5 KW.
As a further improvement, the line pressure of the lamination composite is 0.5-2.6N/mm.
As a further improvement, the moisture curing reaction type polyurethane hot melt adhesive consists of polyether type polyurethane, polyester type polyurethane, tackifying resin and antioxidant. Wherein the proportion of the polyether type to the polyester type is 1.2-1.7, and the NCO mass fraction is 2.6-2.72%.
The utility model has the advantages that:
the utility model discloses at the first adhesive linkage of the outside compound one deck of double-layer fabric, make first adhesive linkage can have in the partial infiltration double-layer fabric, compound one deck second adhesive linkage on first adhesive linkage again, compound one deck rete again on the basis of second adhesive linkage, through the compound structure of multilayer, improve the pressurize effect of gasbag, compare in the mode of traditional floating knife blade coating chamber cloth, transition between each hookup location is more stable, the pressurize effect obtains better promotion.
The utility model discloses a moisture curing reaction type polyurethane hot melt adhesive combines humidity to be 60-80% environment, can let moisture curing reaction type polyurethane hot melt adhesive collect the moisture in the environment and carry out reaction curing, and the energy consumption in the production process is 0.20 ~ 0.3GJ/h, and is lower than traditional production methods energy consumption, environmental protection more.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a composite fabric for a pressure-maintaining airbag according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a method for forming a composite fabric of a pressure maintaining airbag according to an embodiment of the present invention.
Detailed Description
In order to make the embodiments of the present invention belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as referring to the purpose, technical solution and advantages of the embodiments of the present invention, which will be described in detail and fully with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art based on the embodiments of the present invention without inventive step, show or imply relative importance or imply a number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 2, a pressure maintaining one-shot forming airbag composite fabric, comprising: a double-layer fabric, the interior of which comprises a gas bag cavity 1; the first bonding layer 2 is coated on the front side and the back side of the double-layer fabric; a second adhesive layer 3 provided outside the first adhesive layer 2; and a film layer 4 disposed outside the second adhesive layer 3.
Preferably, the first adhesive layer 2 includes an inner layer penetrating into the front and back of the double-layer fabric, and an inner surface layer coated on the front and back of the double-layer fabric.
The inner surface layer forms an inner layer on the basis that the inner connecting layers penetrating into the front side and the back side of the double-layer fabric can seal gaps in the double-layer fabric, and then forms multiple protection through the second bonding layer and the film layer 4, so that the pressure maintaining performance is better.
Preferably, the first adhesive layer 2 and the second adhesive layer 3 are both moisture-curable reactive polyurethane thermosol.
Preferably, the grammage of the first adhesive layer 2 and the second adhesive layer 3 is 15 to 40 g/m
Preferably, the gram weight of the double-layer fabric is 340-500 g/square meter, and the breaking strength of the single-layer fabric forming the double-layer fabric is more than 2500N/5cm.
Preferably, the film layer 4 is any one of a TPEE film, a PU film, a TPU film, and a PA film.
Preferably, the thickness of the film layer 4 is 0.01-0.08 mm, and the elongation at break is more than 300%.
Preferably, the double-layer fabric is any one of high-strength polyester fibers or high-strength nylon fibers.
Preferably, the balloon cavity 1 is a double-layer plain weave.
The embodiment also comprises a method for forming the pressure-maintaining airbag composite fabric, which comprises the following steps:
s1; weaving the fabric into double-layer airbag fabric with a cavity by using a jacquard machine, and maintaining the humidity of a production environment at 60-80%;
s2; preheating a double-layer airbag fabric to 80-120 ℃, heating a film layer to 80-120 ℃, and heating moisture curing reaction type polyurethane hot melt adhesive to 70-120 ℃;
s3; carrying out corona treatment on the double-layer airbag fabric;
s4, performing primary filtration; coating the heated moisture curing reaction type polyurethane hot melt adhesive on the front surface of the double-layer airbag fabric, wherein the gram weight of the heated moisture curing reaction type polyurethane hot melt adhesive is 8-20 g/square meter, coating the heated moisture curing reaction type polyurethane hot melt adhesive on a film layer, and laminating and compounding the heated moisture curing reaction type polyurethane hot melt adhesive and the film layer, wherein the gram weight of the film layer is 10-25 g/square meter;
s5; coating the heated moisture curing reaction type polyurethane hot melt adhesive on the reverse side of the double-layer airbag fabric, wherein the gram weight is 8-20 g/square meter, coating the heated moisture curing reaction type polyurethane hot melt adhesive on a film layer, the gram weight is 10-25 g/square meter, and laminating and compounding the two;
s6; and cooling the double-layer airbag fabric to 15-30 ℃, rolling the double-layer airbag fabric, and standing the double-layer airbag fabric for 24 hours at room temperature.
Further, the power of corona treatment is 2-5 KW, wherein, the adoption of corona treatment mode, the film analogy is more, the fabric is less, a lot of water is washed on the fabric, the water washing is not needed, and the fabric is partially used, but the plasma treatment mode is mostly adopted on the fabric of the air bag, and the hydrophilicity enhancement effect on the fabric of the double-layer air bag is not great.
And the double-layer fabric through corona treatment, when its hydrophilicity improves greatly, the environmental humidity that the cooperation improves makes first adhesive linkage and second adhesive linkage can be at the in-process of moisture solidification, and is better with double-layer fabric's combination effect, and the pressurize performance is better.
Further, the line pressure of the lamination composite is 0.5-2.6N/mm.
Furthermore, the moisture curing reaction type polyurethane hot melt adhesive consists of polyether type polyurethane, polyester type polyurethane, tackifying resin and an antioxidant. The proportion of the polyether type to the polyester type is 1.2-1.7, the mass fraction of NCO is 2.6-2.72%, wherein, under the condition that the proportion of the polyether type to the polyester type is 1.2-1.7, and the mass fraction of isocyanate groups is 2.6-2.72%, the viscosity of the moisture curing reaction type polyurethane hot melt adhesive reaches the best, and the viscosity of the moisture curing reaction type polyurethane hot melt adhesive is increased, which shows that the composite effect between the moisture curing reaction type polyurethane hot melt adhesive and the film layer and the double-layer fabric is better, and further the pressure maintaining performance of the whole air bag can be improved.
Example one
Selecting the linear density of 550dtex, and the strength: 8.7cN/dtex, elongation at break: 25-28% of polyester filament, the cavity tissue of the air bag adopts a double-layer plain weave, the suture tissue of the air bag adopts a layer-changing tying tissue shown in a schematic diagram, and the suture width is 8mm. Drawing corresponding air bag contour, air bag thread arrangement and cavity arrangement according to the matched automobile size requirement, and weaving by using a jacquard loom. The specification of the fabric is as follows: the warp density is 111.8 strips/inch, the warp density is 96.5 strips/inch, and the gram weight of a single layer of the fabric is 215-225 grams per square meter.
The method specifically comprises the following steps: selecting a TPEE film with the thickness of 0.02mm;
selecting a moisture curing reaction type polyurethane hot melt adhesive with the model number of TL5202;
maintaining the humidity of the production environment at 70 +/-3%;
preheating a double-layer fabric of the safety airbag to 100 ℃ by using a heating roller; heating the film layer to 110 ℃ by using a hot roller;
heating the moisture curing reaction type polyurethane hot melt adhesive to 110 ℃;
carrying out corona treatment on the double-layer fabric, wherein the corona power is 3KW;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the front surface of the double-layer fabric, wherein the gram weight of the coating is 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on the film layer, wherein the gram weight of the coating is 15 g/square meter;
laminating and compounding the front surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the reverse side of the double-layer fabric by 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on the film layer by 15 g/square meter;
laminating and compounding the reverse surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
and rolling the compounded double-layer airbag fabric, and standing at room temperature for 24 hours.
The air bag was cut out by a laser cutting machine in accordance with the preset size of the air bag and designated as sample A1.
Example two
The difference between the present embodiment and the first embodiment is: the selected film layer is a polyether type TPU film.
The linear density is 550dtex, and the strength is as follows: 8.7cN/dtex, elongation at break: 25-28% of polyester filament, the cavity tissue of the air bag adopts a double-layer plain weave, the suture tissue of the air bag adopts a layer-changing tying tissue shown in a schematic diagram, and the suture width is 8mm. Drawing corresponding air bag contour, air bag thread arrangement and cavity arrangement according to the matched automobile size requirement, and weaving by using a jacquard loom. The specification of the fabric is as follows: the warp density is 111.8 strips/inch, the warp density is 96.5 strips/inch, and the gram weight of a single layer of the fabric is 215-225 grams per square meter.
The method specifically comprises the following steps: selecting a polyether type TPU film with the thickness of 0.02mm;
the model of the selected moisture curing reaction type polyurethane hot melt adhesive is TL5202;
maintaining the humidity of the production environment at 70 +/-3%;
preheating a double-layer fabric of an air bag to 100 ℃ by using a heating roller; heating the film layer to 110 ℃ by using a hot roller;
heating the moisture curing reaction type polyurethane hot melt adhesive to 110 ℃;
carrying out corona treatment on the double-layer fabric, wherein the corona power is 3KW;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the front surface of the double-layer fabric, wherein the gram weight of the coating is 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on the film layer, wherein the gram weight of the coating is 15 g/square meter;
laminating and compounding the front surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the reverse side of the double-layer fabric by 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on the film layer by 15 g/square meter;
laminating and compounding the reverse surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
and rolling the compounded double-layer airbag fabric, and standing at room temperature for 24 hours.
The air bag was cut out by a laser cutting machine in accordance with the preset size of the air bag and designated as sample A2.
Comparative example 1
The difference between the present embodiment and the first embodiment is: the humidity of the production environment is 50 +/-3%.
The linear density is 550dtex, and the strength is as follows: 8.7cN/dtex, elongation at break: 25-28% of polyester filament, the cavity tissue of the air bag adopts a double-layer plain weave, the suture tissue of the air bag adopts a layer-changing tying tissue shown in a schematic diagram, and the suture width is 8mm. Drawing corresponding air bag contour, air bag thread arrangement and cavity arrangement according to the matched automobile size requirement, and weaving by using a jacquard loom. The specification of the fabric is as follows: the warp density is 111.8 strips/inch, the warp density is 96.5 strips/inch, and the single-layer gram weight of the fabric is 215-225 grams per square meter.
The method comprises the following specific steps: selecting a polyether type TPU film with the thickness of 0.02mm;
selecting a moisture curing reaction type polyurethane hot melt adhesive with the model number of TL5202;
maintaining the humidity of the production environment at 50 +/-3%;
preheating a double-layer fabric of the safety airbag to 100 ℃ by using a heating roller; heating the film layer to 110 ℃ by using a hot roller;
heating the moisture curing reaction type polyurethane hot melt adhesive to 110 ℃;
carrying out corona treatment on the double-layer fabric, wherein the corona power is 3KW;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the front surface of the double-layer fabric, wherein the gram weight of the coating is 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on a film layer, wherein the gram weight of the coating is 15 g/square meter;
laminating and compounding the front surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the reverse side of the double-layer fabric by 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on the film layer by 15 g/square meter;
laminating and compounding the reverse surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
and rolling the compounded double-layer airbag fabric, and standing at room temperature for 24 hours.
The air bags were cut out by a laser cutting machine in accordance with the preset size of the air bags and recorded as a control sample 1.
Comparative example 2
The embodiment is the prior art, namely the airbag is processed completely according to the existing processing mode without any special processing mode.
The linear density is 550dtex, and the strength is as follows: 8.7cN/dtex, elongation at break: 25-28% of polyester filament, the cavity tissue of the air bag adopts double-layer plain weave, the air bag suture tissue adopts layer-changing tying tissue shown in a schematic diagram, and the suture width is 8mm. Drawing corresponding air bag contour, air bag thread arrangement and cavity arrangement according to the matched automobile size requirement, and weaving by using a jacquard loom. The specification of the fabric is as follows: the warp density is 111.8 strips/inch, the warp density is 96.5 strips/inch, and the single-layer gram weight of the fabric is 215-225 grams per square meter.
The method specifically comprises the following steps: coating the front surface of the airbag fabric, pre-drying the airbag fabric by hot air at 130-160 ℃, and cooling the airbag fabric to 30-40 ℃. Coating silica gel on the airbag fabric, wherein the gram weight of the coating is 65-70 g/square meter, putting the fabric into a hot air oven, heating the fabric by hot air at 160-180 ℃ for 130 seconds to mature the silica gel, then carrying out top coating treatment at 10 g/square meter, heating the fabric by hot air at 130 ℃ for 30 seconds to fully crosslink the top coating, and rolling the airbag;
coating the reverse side of the airbag fabric, wherein the gram weight of the coating is 65-70 g/square meter, putting the fabric into a hot air oven, heating the fabric with hot air at 160-180 ℃ for 130 seconds to mature the silica gel, then carrying out top coating treatment at 10 g/square meter, heating the fabric with hot air at 130 ℃ for 30 seconds to fully crosslink the top coating, and rolling the airbag.
The air cells were cut out by a laser cutting machine in accordance with the preset size of the air cells and recorded as a control sample 2.
Comparative example 3
The difference between the present embodiment and the first embodiment is: the adopted hot melt adhesive is EVA hot melt adhesive.
The linear density is 550dtex, and the strength is as follows: 8.7cN/dtex, elongation at break: 25-28% of polyester filament, the cavity tissue of the air bag adopts double-layer plain weave, the air bag suture tissue adopts layer-changing tying tissue shown in a schematic diagram, and the suture width is 8mm. Drawing corresponding air bag contour, air bag thread arrangement and cavity arrangement according to the matched automobile size requirement, and weaving by using a jacquard loom. The specification of the fabric is as follows: the warp density is 111.8 strips/inch, the warp density is 96.5 strips/inch, and the gram weight of a single layer of the fabric is 215-225 grams per square meter.
The method comprises the following specific steps: selecting a polyether type TPU film with the thickness of 0.02mm;
selecting an EVA hot melt adhesive;
maintaining the humidity of the production environment at 70 +/-3%;
preheating a double-layer fabric of an air bag to 100 ℃ by using a heating roller; heating the film layer to 110 ℃ by using a hot roller;
heating EVA hot melt adhesive to 110 ℃;
carrying out corona treatment on the double-layer fabric, wherein the corona power is 3KW;
coating the heated EVA hot melt adhesive on the front surface of the double-layer fabric, wherein the gram weight of the coating is 15 g/square meter, and coating the heated EVA hot melt adhesive on the film layer, wherein the gram weight of the coating is 15 g/square meter;
laminating and compounding the front surface of the double-layer fabric coated with the EVA hot melt adhesive and the film layer coated with the EVA hot melt adhesive, wherein the linear pressure is 1.3N/mm;
coating the heated EVA hot melt adhesive on the reverse side of the double-layer fabric by 15 g/square meter, and coating the heated EVA hot melt adhesive on the film layer by 15 g/square meter;
laminating and compounding the reverse side of the double-layer fabric coated with the EVA hot melt adhesive and the film layer coated with the EVA hot melt adhesive, wherein the linear pressure is 1.3N/mm;
and rolling the compounded double-layer airbag fabric, and standing at room temperature for 24 hours.
The air cells were cut out by a laser cutting machine in accordance with the preset size of the air cells and recorded as a control sample 3.
Comparative example 4
The difference between the present embodiment and the first embodiment is: the double layer fabric was not corona treated.
The linear density is 550dtex, and the strength is as follows: 8.7cN/dtex, elongation at break: 25-28% of polyester filament, the cavity tissue of the air bag adopts a double-layer plain weave, the suture tissue of the air bag adopts a layer-changing tying tissue shown in a schematic diagram, and the suture width is 8mm. Drawing corresponding air bag contour, air bag thread arrangement and cavity arrangement according to the matched automobile size requirement, and weaving by using a jacquard loom. The specification of the fabric is as follows: the warp density is 111.8 strips/inch, the warp density is 96.5 strips/inch, and the single-layer gram weight of the fabric is 215-225 grams per square meter.
Selecting a TPEE film with the thickness of 0.02mm;
selecting a moisture curing reaction type polyurethane hot melt adhesive with the model number of TL5202;
maintaining the humidity of the production environment at 70 +/-3%;
preheating a double-layer fabric of an air bag to 100 ℃ by using a heating roller; heating the film layer to 110 ℃ by using a hot roller;
heating the moisture curing reaction type polyurethane hot melt adhesive to 110 ℃;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the front surface of the double-layer fabric, wherein the gram weight of the coating is 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on a film layer, wherein the gram weight of the coating is 15 g/square meter;
laminating and compounding the front surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
coating the heated moisture curing reaction type polyurethane hot melt adhesive on the reverse side of the double-layer fabric by 15 g/square meter, and coating the heated moisture curing reaction type polyurethane hot melt adhesive on the film layer by 15 g/square meter;
laminating and compounding the reverse surface of the double-layer fabric coated with the moisture curing reaction type polyurethane hot melt adhesive and the film layer coated with the moisture curing reaction type polyurethane hot melt adhesive, wherein the linear pressure is 1.3N/mm;
and rolling the compounded double-layer airbag fabric, and standing at room temperature for 24 hours.
The air bags were cut out by a laser cutting machine in accordance with the preset size of the air bags and recorded as a control sample 4.
A number of experiments were carried out according to the different procedures of the various examples described above, giving the following table:
from the data in the table above, the following conclusions can be drawn:
in embodiment one and embodiment two, what adopt is moisture curing reaction type polyurethane hot melt adhesive, can absorb the steam in the collection air and make and solidify, the ambient humidity of cooperation production is located between 60 ~ 80%, make to the effect that solidifies reach the best, the intensity of peeling off obtains the reinforcing, simultaneously, all carry out corona treatment to double-deck gasbag fabric before compound, improve the hydrophilicity of double-deck gasbag fabric, be favorable to cooperating the better reaction of moisture curing reaction type polyurethane hot melt adhesive and solidifying in the environment of high humidity, cooperation through a plurality of conditions, improve the intensity of whole gasbag, and simultaneously, need not to adopt the external solidification mode of silica gel again, energy saving and cost reduction.
It should be emphasized that, in the prior art, a reactive polyurethane hot melt adhesive is used as an adhesive, but it needs to be compounded for a long time only by slowly absorbing moisture in air, in the present case, firstly, the humidity of the production environment is raised to 60-80%, the humidity raising mode is a water atomization mode, especially in the compounding process of different levels, the humidity is strictly controlled to be about 70%, the absorption effect of the reactive polyurethane hot melt adhesive is the best, if the humidity is less than 60%, a long-time waiting time is needed, if the humidity is more than 80%, the reaction speed is too fast, the generated carbon dioxide gas cannot be sufficiently discharged, and bubbles are easily generated in an adhesive layer.
The samples A1 and A2 of the first and second examples are lower in humidity of the production environment of the comparative example 1 than the comparative sample 1 of the first comparative example, so that the peel strength of the airbag sample after the test is lower, and the peel value is between 49 and 51, which is the lower limit value of the product requirement, and is not satisfactory.
In the second comparative example, a silicon coating scheme commonly used in the industry is used, the width of the fabric is 2.3-3 meters, the double-layer fabric is divided into a suture tissue, a cavity tissue and a lug tissue according to the size requirement of an airbag accessory, the fabric surface is uneven due to the change of the tissue, when the silica gel is knife-coated, the tension of the coating is unstable due to the unevenness of the fabric surface, the gram weight of the coating is unstable, the thickness of the coating is uneven, and the pressure maintaining performance of the fabric of the airbag of the silica gel coating is unstable, wherein the hard-extended lengths of samples A1 and A2 in the first and second examples are 3-4 higher than that of the silica gel coating in the second example, the total hard-extended lengths are in the range of the airbag industry (the industry value is less than 20), and the pressure maintaining stability of the samples A1 and A2 is more stable than that of the silica gel coating in the second example.
Compared with the control sample 3 in the third comparative example, the samples A1 and A2 in the first and second examples are EVA hot melt adhesives, and it can be seen from the table that the peel strength after aging test is not satisfactory, and the influence of the conventional hot melt adhesive in the industry on the pressure holding stability of the whole airbag is large.
Compared with the comparative sample 4 in the fourth comparative example, the samples A1 and A2 in the first and second examples are not subjected to corona treatment, and when the samples are not subjected to corona treatment, the hydrophilicity of the double-layer fabric is poor, and the compounding effect between the moisture-curing reactive polyurethane hot melt adhesive and the film layer and the double-layer fabric is poor, and it is particularly emphasized that the corona treatment is often applied to film products, because the fabric is usually washed with water and then treated with plasma, and because the fabric is not washed with water, the treatment can be carried out by adopting the corona treatment, and the cost is lower and the effect is better compared with the plasma treatment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A pressure-maintaining one-shot forming airbag composite fabric, characterized by comprising: a double-layer fabric, the interior of which comprises a balloon cavity;
the first bonding layers are coated on the front side and the back side of the double-layer fabric;
a second adhesive layer disposed outside the first adhesive layer;
the film layer is arranged on the outer side of the second bonding layer;
the first bonding layer and the second bonding layer are both moisture-curing reaction type polyurethane thermosol.
The first bonding layer comprises an inner connecting layer which permeates the inside of the front surface and the inside of the back surface of the double-layer fabric, and an inner surface layer which is coated on the surface of the front surface and the surface of the back surface of the double-layer fabric.
2. The pressure maintaining one shot forming airbag composite fabric of claim 1, wherein the grammage of the first adhesive layer and the second adhesive layer is 15 to 40 g/m.
3. The pressure-maintaining one-shot forming airbag composite fabric as claimed in claim 1, wherein the grammage of the double-layer fabric is 340 to 500 g/m, and the breaking strength of the single-layer fabric constituting the double-layer fabric is more than 2500N/5cm.
4. The pressure maintaining one shot forming airbag composite fabric of claim 1, wherein the film layer is any one of TPEE film, PU film, TPU film, PA film.
5. The pressure maintaining one shot forming airbag composite fabric of claim 4, wherein the thickness of the film layer is 0.01 to 0.08mm and the elongation at break is more than 300%.
6. The pressure-maintaining one-shot forming airbag composite fabric according to claim 3, wherein the double-layer fabric is any one of high-strength polyester fibers or high-strength nylon fibers.
7. The pressure-maintaining one-shot forming airbag composite fabric according to claim 1, wherein the airbag cavity is a double-layer plain weave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221041216.9U CN218020589U (en) | 2022-04-29 | 2022-04-29 | Pressure-maintaining one-step forming safety airbag composite fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221041216.9U CN218020589U (en) | 2022-04-29 | 2022-04-29 | Pressure-maintaining one-step forming safety airbag composite fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218020589U true CN218020589U (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221041216.9U Active CN218020589U (en) | 2022-04-29 | 2022-04-29 | Pressure-maintaining one-step forming safety airbag composite fabric |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218020589U (en) |
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2022
- 2022-04-29 CN CN202221041216.9U patent/CN218020589U/en active Active
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