Preparation method of thin-wall type high-strength composite drainage air bag

Abstract

The invention discloses a preparation method of a thin-wall type high-strength composite drainage air bag, and relates to a preparation method of a drainage air bag which is composed of an air bag top cover, an air bag body, a rubber flange and an easily-broken part. The air bag top cover is made of glass fiber reinforced plastic and carbon fiber composite materials, a water pushing face is formed in the drainage process to discharge water in the cabin, and after water is discharged, the top cover is located on the inner side of the drainage hole. The air bag main body is adhered by high-strength double-sided adhesive fabric, and the edge position of the air bag top cover is subjected to double-layer reinforcement; the rubber flange is made of high-strength fabric, and the vertical face bottom is subjected to double-layer reinforcement. The easy-to-break part is made of low-strength fabric, one end of the easy-to-break part is attached between the air bag body and the top cover, and the other end of the easy-to-break part is attached / pressed in a reserved groove of the rubber flange; the drainage air bag prepared by the invention is formed by compounding the semi-hard top cover (glass fiber reinforced plastic carbon fiber composite material) and the adhesive tape, and the air bag is firmer and realizes light weight.

Description

Technical Field

[0001] The invention relates to a method for preparing a drainage airbag, in particular to a method for preparing a drainage airbag made of a thin-walled high-strength composite material. Background Art

[0002] At present, the drainage of underwater test devices mainly adopts piston drainage. Due to the heavy weight of the piston, this drainage method starts to work when the power is greater than the weight of the piston itself. It requires high instantaneous explosive force of the power device. At the same time, in order to increase the displacement, the gap between the piston and the cylinder wall is required to be high. It is more ideal to use thin-walled airbags to achieve its weight reduction and drainage requirements. The thin-walled drainage airbag is folded and installed at the bottom of the underwater cylindrical tube test device. It is quickly inflated by 400℃ high-pressure gas to discharge the water in the device to the outside of the cylinder within 3s. The displacement is not less than 85%. The thin-walled drainage airbag has airtight performance after inflation. It needs to change its own buoyancy to achieve the purpose of floating on the water surface, which is convenient for the salvage, recovery and reuse of the device.

[0003] The existing published paper "Space Return and Remote Sensing" Vol. 26 No. 1, March 2005 introduces a large underwater drainage airbag. The airbag is mainly composed of an inner bag, an outer bag, an air guide bag, a mounting valve, a flange and a connecting steel ring. Its shape from top to bottom is a combination of a hemisphere, a cylinder and an inverted frustum, and the bottom is not closed as an inflation port; the inner bag is made of double-sided tape, the outer bag is sewn with high-strength fabric, and the outer surface of the outer bag is a mesh structure composed of aramid tape. An air guide bag is set at the bottom inflation port to ensure the orderly deployment of the airbag, and the bottom is connected to the device through a flange. First, this type of drainage airbag has many layers, the production process is complicated, and it is difficult to fold the product into the airbag bag in an orderly manner. Second, the product needs to be straightened from top to bottom under the action of the simulated buoyancy counterweight. Third, in terms of product structure, the outer diameter of the bladder at the flange is less than 1 / 6 of the maximum outer diameter of the bladder, and the height of the size transition zone is 1 / 4 of the height of the entire bladder when it is deployed. During the drainage process, some water accumulates at the lower end of the cylinder and cannot be discharged, and the drainage capacity needs to be improved. Fourth, after the product is inflated and deployed to complete drainage, the airbag is locally stressed at the drainage port, forming a weak point and causing damage. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing a thin-walled high-strength composite drainage airbag. The airbag top cover of the present invention is made of fiberglass and carbon fiber composite materials. A water push surface is formed during the drainage process to discharge water in the cabin. After the water is discharged, the top cover is located on the inside of the drainage hole; the airbag body is made of high-strength double-sided rubber fabric for bonding, and double-layer reinforcement is performed at the edge of the airbag top cover; the rubber flange is made of high-strength fabric, and double-layer reinforcement is performed on the bottom of the vertical surface; the breakable part is made of low-strength fabric, one end of which is bonded between the airbag body and the top cover, and the other end is bonded / pressed in the reserved groove of the rubber flange; the drainage airbag prepared by the present invention is stronger and lightweight.

[0005] The objective of the present invention is achieved through the following technical solutions: A method for preparing a thin-walled high-strength composite drainage airbag, wherein the drainage airbag prepared by the method comprises an airbag top cover, an airbag body, a rubber flange, and a breakable part; the airbag top cover is made of glass fiber reinforced plastic and carbon fiber composite material, and a water push surface is formed during the drainage process to discharge water in the cabin. After the water is discharged, the top cover is located on the inner side of the drainage hole; the airbag body is bonded with high-strength double-sided rubber fabric, and double-layer reinforcement is performed at the edge of the airbag top cover; the rubber flange is made of high-strength fabric, and double-layer reinforcement is performed on the bottom of the vertical surface; the breakable part is made of low-strength fabric, one end of which is bonded between the airbag body and the top cover, and the other end is bonded / pressed in the reserved groove of the rubber flange; The specific preparation steps include: (1) Preparing the airbag main body rubber compound; (2) Preparation of adhesive solution for airbag main body adhesive tape: (3) Preparing airbag main body tape; (4) preparing airbag patch adhesive solution; (5) preparing airbag patch; (6) Preparation of fragile parts; (7) Preparing molding glue; (9) Preparation of rubber flange; (10) Tape cutting and taping: Cut the airbag main body tape according to the cutting template, including the top cover top sheet, top cover side sheet, transition side sheet, and main body side sheet; (11) Airbag molding: Add 1.5-3‰ thioacetamide to the prefabricated molding glue, stir evenly and use it as the adhesive for the molding of thin-walled drainage airbags; clean the hemp-beaten film with gasoline, apply the adhesive 2-3 times and dry it, then manually stick the top cover, top cover side pieces, transition side pieces, main body side pieces and flanges in sequence, and stick the inner and outer lap joints with a single-sided hemp-beaten patch; stick the easily broken parts evenly on the inner side of the fiberglass reinforced plastic and carbon fiber composite top cover; stick the fiberglass reinforced plastic and carbon fiber composite top cover that has been applied 2-3 times and dried on the formed airbag; (12) Airbag vulcanization: The airbag is vulcanized in a vulcanization tank; (13) Airbag integration: The airbag is folded in an orderly manner into the top cover made of fiberglass and carbon fiber composite, and the fragile parts are bonded / pressed on the flange with adhesive to obtain a thin-walled drainage airbag.

[0006] The method for preparing a thin-walled high-strength composite drainage airbag comprises the following steps: preparing the main body rubber mix of the airbag, putting chloroprene rubber into an internal mixer for plasticization, putting magnesium oxide and an antioxidant into the internal mixer; putting a reinforcing agent and a plasticizer into the internal mixer; removing the rubber to obtain a masterbatch; adding zinc oxide and an accelerator on an open mixer, and preparing the main body rubber mix of the airbag by thinning, sheeting, and cooling.

[0007] The thin-wall drainage airbag and its preparation method, the preparation of the airbag main body adhesive tape viscosity enhancing adhesive liquid, the natural rubber and chloroprene rubber are added on the open mill for plasticization; magnesium oxide and antioxidant are added on the open mill; reinforcing agent is added on the open mill; zinc oxide, accelerator, adhesive are added on the open mill; the adhesive material for the airbag main body adhesive tape viscosity enhancing layer is prepared through thinning, sheeting, and cooling; the adhesive material for the airbag main body adhesive tape viscosity enhancing layer and the solvent are stirred in a stirring tank to prepare the airbag main body adhesive tape viscosity enhancing adhesive liquid.

[0008] The method for preparing a thin-walled high-strength composite drainage airbag comprises the following steps: preparing the airbag main body tape, pre-treating the aramid cloth with ethyl ester, drying it, and applying glue; adding 2% by weight of the airbag main body tape viscosity-enhancing glue liquid to RFE and stirring it evenly, and then applying glue on both sides of the aramid cloth using a glue coating machine; hot-refining the airbag main body mixed rubber, drying the double-sided glue-coated aramid cloth, and applying glue on both sides of the airbag main body coated cloth using a three-roll calender to make the airbag main body tape, and vulcanizing the airbag main body tape.

[0009] The method for preparing a thin-walled high-strength composite drainage airbag comprises the following steps of preparing the airbag patch adhesive liquid: adding natural rubber and chloroprene rubber on an open mill for plasticization; adding stearic acid and an antioxidant on the open mill; adding a reinforcing agent on the open mill; adding a vulcanizing agent, an accelerator, and an adhesive on the open mill, and preparing the patch adhesive through thin-passing, sheeting, and cooling; and stirring the airbag patch adhesive with a solvent in a stirring tank to prepare the airbag patch adhesive liquid.

[0010] The method for preparing a thin-walled high-strength composite drainage airbag comprises the following steps of preparing the airbag patch: using a glue coating machine to coat the airbag patch adhesive on brocade silk; after the adhesive coated cloth is dried, using a three-roll calender to coat the airbag patch adhesive on both sides to make the airbag patch; vulcanizing the airbag patch in a vulcanizing tank, cutting the airbag patch into wide adhesive tape strips, and single-sided hemp-binding the strips.

[0011] The method for preparing a thin-walled high-strength composite drainage airbag comprises the following steps: preparing the easily breakable part by stirring the airbag main body mixed rubber and solvent in a stirring tank to form an easily breakable part glue liquid; applying the easily breakable part glue liquid on a fine flat cloth by a glue coating machine; vulcanizing the easily breakable part tape by a drum vulcanizing machine, and cutting the vulcanized tape into tape strips as the easily breakable part.

[0012] The method for preparing a thin-walled high-strength composite drainage airbag comprises the following steps: preparing a molding adhesive liquid, adding chloroprene rubber to plasticize on an open mill; adding magnesium oxide and an anti-aging agent on the open mill; adding a reinforcing agent on the open mill; preparing a molding adhesive liquid mixed rubber by thinning, sheeting, and cooling; and stirring the mixed rubber and a solvent in a stirring tank to prepare a molding adhesive liquid.

[0013] The method for preparing a thin-walled high-strength composite drainage airbag comprises preparing a rubber flange, placing the airbag main body rubber and unvulcanized airbag main body tape into a special mold, wherein the flange plane has 4 to 6 layers of tape, the flange vertical surface has 2 layers of tape, the vertical surface tape is sandwiched between the plane tapes, the two sides of the tapes are evenly attached to the airbag main body film, and the molding is vulcanized.

[0014] The advantages and effects of the present invention are: 1. The drainage airbag prepared by the present invention is composed of a semi-rigid top cover (glass fiber reinforced plastic carbon fiber composite material) and adhesive tape. This structure makes the piston drainage scheme lighter, has low requirements for product dimensional accuracy, and rounds the corners of the top cover to reduce the risk of jamming during the drainage process. After the airbag completes drainage, the pressure of the airbag body is shared by the metal cylinder wall, and the semi-rigid top cover plays a major role in bearing pressure, and the pressure strength is better than that of the pure adhesive tape top cover. The prepared airbag is stronger and lighter.

[0015] 2. The drainage airbag product prepared by the present invention has a large size after being inflated. In the product packaging, the tape part is folded in order on the inner side of the top cover, and the top cover and the flange are connected with breakable parts to form an integral structure (the volume is reduced to 1 / 10 of the original size), which is convenient for product packaging, transportation and installation.

[0016] 3. The drainage airbag product prepared by the present invention is light in weight, expands rapidly and drains water after being filled with gas, the vertical drainage volume is greater than 90%, the horizontal 20° drainage volume is greater than 99%, and it can remain airtight after drainage is completed.

[0017] 4. The drainage airbag prepared by the present invention is different from negative pressure and gravity drainage. When this product is used for drainage, it is a positive pressure environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the thin-wall drainage airbag of the present invention before folding; Figure 2 This is a schematic diagram of the thin-walled drainage airbag of the present invention after folding; Figure 3 This is a schematic diagram of a thin-walled drainage airbag top cover of the present invention; Figure 4 This is a schematic diagram of the thin-walled drainage airbag flange of the present invention; Figure 5 This is a real photo of the thin-wall drainage airbag product of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings.

[0020] The thin-walled drainage airbag of the present invention comprises an airbag top cover, an airbag body, a rubber flange, and a breakable part. The airbag top cover is made of glass fiber reinforced plastic and carbon fiber composite material, and a water-pushing surface is formed during the drainage process to ensure the degree of water discharge in the cabin. After the water is discharged, the top cover is located inside the drainage hole, which can avoid the risk of rupture at this position due to the large drainage port and limited airbag strength. At the same time, stress encountered during the rising process can produce corresponding deformation, thereby reducing the jamming phenomenon; the airbag body is made of high-strength double-sided rubber fabric for bonding, and double-layer reinforcement is performed at the edge of the airbag top cover; the rubber flange is made of high-strength fabric, and double-layer reinforcement is performed at the bottom of the vertical surface to prevent the side wall of the airbag body from being pressed into the installation surface pressure plate during the installation process due to the low stiffness of the single-layer double-sided rubber fabric; the breakable part is made of low-strength fabric, one end of which is bonded between the airbag body and the top cover, and the other end is bonded / pressed in the reserved groove of the rubber flange.

[0021] The preparation process of the thin-walled drainage airbag is as follows: Step 1: Preparation of the main rubber compound for the airbag. Put the chloroprene rubber into the internal mixer for plastication for 1-2 minutes; put magnesium oxide and antioxidant into the internal mixer for 1-2 minutes; put reinforcing agent and plasticizer into the internal mixer for 8-10 minutes; discharge the rubber to obtain the masterbatch, and the discharge temperature is not higher than 130°C; the masterbatch is parked for more than 8 hours, and after hot refining, it is filtered through a rubber filter with 2 layers of 40×60 mesh copper mesh, with the head temperature of 60-70°C and the body temperature of 40-50°C; add zinc oxide and accelerator on the open mixer for 6-8 minutes, and make the main rubber compound for the airbag through thin pass, sheeting and cooling.

[0022] Step 2: Preparation of adhesive liquid for the main body of the airbag tape. Add natural rubber and chloroprene rubber to the open mill for plastication for 5 to 7 minutes; add magnesium oxide and antioxidant to the open mill for 10 to 12 minutes; add reinforcing agent to the open mill for 15 to 18 minutes; the masterbatch is parked for more than 8 hours, and after hot refining, it is filtered using a rubber filter with 2 layers of 60×60 mesh copper mesh, with the head temperature of 70 to 80°C and the body temperature of 50 to 60°C; add zinc oxide, accelerator, and adhesive to the open mill for 6 to 8 minutes, and make the adhesive for the adhesive layer of the main body of the airbag tape through thin pass, sheeting, and cooling. The adhesive for the adhesive layer of the main body of the airbag tape is stirred with the solvent (gasoline: ethyl ester = 7:3) in a mixing tank at a ratio of 1:2 to 3 to make the adhesive liquid for the main body of the airbag tape.

[0023] Step 3: Preparation of the airbag main body tape. Pre-treat the aramid cloth with ethyl ester, dry it 2 to 3 times, and then apply glue; add 2% of the weight of the airbag main body tape viscosity-enhancing glue liquid to RFE and stir evenly, then use a glue coating machine to apply glue on both sides of the aramid cloth; after hot-refining the airbag main body mixed rubber, dry the double-sided glued aramid cloth 2 to 3 times, and use a three-roll calender to double-side glue on the airbag main body coated cloth to make the airbag main body tape, with a tape thickness of 0.75 to 0.85 mm; vulcanize the airbag main body tape using a vulcanizing tank, the vulcanization temperature is 141 to 145 ° C, the vulcanization time is 30 to 40 × 45 × 5 min, and the wind pressure is 0.4 MPa.

[0024] Step 4: Preparation of adhesive liquid for airbag patch. Add natural rubber and chloroprene rubber to the open mill for plasticizing for 5-7 minutes; add stearic acid and antioxidant to the open mill for 8-10 minutes; add reinforcing agent to the open mill for 10-12 minutes; leave the masterbatch for more than 8 hours, and filter it with a 2-layer 40×60 mesh copper mesh of a rubber filter after hot refining, with the head temperature of 70-80℃ and the body temperature of 50-60℃; add vulcanizing agent, accelerator and adhesive to the open mill for 6-8 minutes, and make the adhesive material for patch after thin pass, sheeting and cooling. Stir the rubber material for airbag patch and solvent (gasoline: ethyl ester = 1:1) in a mixing tank at a ratio of 1:2.5-3.5 to make the adhesive liquid for airbag patch.

[0025] Step 5: Preparation of airbag patch. Use a glue coating machine to apply the glue liquid of the airbag patch on the brocade silk, 1~2 times on each side; after the glued cloth is dried 2~3 times, use a three-roll calender to coat the glue on both sides of the airbag patch coated cloth to make the airbag patch, the thickness of the tape is 0.45~0.5mm; the airbag patch is vulcanized in a vulcanizing tank, the vulcanization temperature is 143~145℃, the vulcanization time is 10×45×5min, and the wind pressure is 0.3MPa. Cut the airbag patch into 30mm wide tape strips and smear one side.

[0026] Step 6: Preparation of easy-to-break parts. Stir the airbag main body rubber mix and solvent (gasoline: ethyl ester = 1:1) in a mixing tank at a ratio of 1:2.5~3 to make easy-to-break glue liquid; use a glue coating machine to apply the easy-to-break glue liquid on a fine flat cloth, 2~3 times on each side, with a thickness of 1.3~1.5mm; use a drum vulcanizer to vulcanize the easy-to-break tape, with a vulcanization temperature of 145~155℃, a vulcanization time of 20~50min, and a vulcanization pressure of 12~15MPa, and cut the vulcanized tape into tape strips as easy-to-break parts.

[0027] Step 7: Preparation of molding glue liquid. Add chloroprene rubber on the open mill and plasticize for 3-5 minutes; add magnesium oxide and antioxidant on the open mill for 5-8 minutes; add reinforcing agent on the open mill for 10-12 minutes; make molding glue liquid mixed rubber through thin pass, sheeting and cooling; stir the mixed rubber and solvent (gasoline: ethyl ester = 1:1) in a mixing tank at a ratio of 1:2.5-3 to make molding glue liquid.

[0028] Step 8: Preparation of rubber flange. Put the airbag main body rubber and uncured airbag main body tape into a special mold, with 4 to 6 layers of tape on the flange plane and 2 layers of tape on the flange vertical surface. The vertical surface tape is sandwiched between the flat surface tapes. The two sides of the tape are evenly attached to the airbag main body film. Vulcanize by molding, the vulcanization temperature: 145~155℃, the vulcanization time: 60~90min, the vulcanization pressure: 12~15MPa.

[0029] Step 9: Cutting and hemping the tape. Cut the airbag main body tape according to the cutting template, including the top cover top sheet, top cover side sheet, transition side sheet, and main body side sheet; the hemping width is divided into 15mm, 45mm, 65mm, and single-sided full hemping according to different positions.

[0030] Step 10: Airbag molding. Add 1.5~3‰ of thioacetamide to the prefabricated molding glue, stir evenly and use it as the adhesive for the molding of thin-walled drainage airbags; clean the hemp-stripped film with gasoline, apply the adhesive 2~3 times and dry it, then manually stick the top cover sheet, top cover side sheet, transition side sheet, main body side sheet and flange in sequence, and stick the inner and outer lap joints with a single-sided hemp-stripped patch; stick the easily broken parts evenly on the inner side of the fiberglass and carbon fiber composite top cover; stick the fiberglass and carbon fiber composite top cover that has been applied 2~3 times and dried on the molded airbag.

[0031] Step 10: Vulcanization of the airbag. The airbag is vulcanized in a vulcanization tank, with a vulcanization temperature of 143~145℃, a vulcanization time of 10×30×5min, and an air pressure of 0.4MPa.

[0032] Step 11: Airbag integration. The airbag is folded into the top cover made of fiberglass and carbon fiber in an orderly manner, and the easily broken parts are bonded to the flange with adhesive to obtain a thin-walled drainage airbag.

[0033] The following further provides examples of the preparation and use of thin-walled drainage airbags.

[0034] The thin-walled drainage airbag of the present invention includes an airbag top cover, an airbag body, a rubber flange, and breakable parts. The airbag top cover is made of fiberglass and carbon fiber composite material, with a wall thickness of 5mm, a horizontal top, and a side fillet of R50. During the drainage process, the horizontal position of the top cover serves as the main water-pushing surface to ensure the smooth discharge of water in the cabin. After the water is discharged, the top cover is located on the inside of the drainage hole, which can avoid the risk of rupture at this position due to the large drainage port and limited airbag strength. At the same time, stress encountered during the ascent process can produce corresponding deformation, thereby reducing the jamming phenomenon. The airbag body is made of high-strength double-sided adhesive fabric, which is divided into a top cover top sheet, a top cover side sheet, a transition side sheet, and a main body side sheet. The tape overlap width is 30mm, and the inner and outer sides are covered with adhesive tape. Lamination, in which double-layer reinforcement is carried out at the edge of the airbag top cover, that is, the overlap width of the top cover side piece and the transition side piece is 50mm, to prevent local stress damage to the edge of the top cover during the airtight process of the airbag; the rubber flange is made of high-strength fabric, and the vertical bottom is double-layer reinforced to prevent the side wall of the airbag body from being pressed into the installation surface pressure plate during the installation process due to the low stiffness of the single-layer double-sided rubber-hung fabric, and 4 easy-to-break parts are evenly distributed on the flange; the easy-to-break parts are made of low-strength long strips of rubber-coated fabric, and 4 strips are evenly fixed on the top cover. When folding and packaging the airbag, its lower end is clamped between the airbag rubber flange and the metal flange pressure plate.

[0035] The drainage airbag is installed at the bottom of the water tank. It should be kept folded before inflation and should not float up due to buoyancy. When inflated, the drainage airbag needs to float up quickly. The function of the breakable part is to tie the drainage airbag to the bottom of the water tank before inflation. When inflated, it breaks when subjected to appropriate tension, allowing the airbag to float up smoothly. After the drainage airbag is installed, it will float up due to buoyancy. The minimum strength of the breakable part is the strength required to overcome this buoyancy.

[0036] The main rubber of the airbag includes 100 parts of chloroprene rubber, 35 parts of quick-extrusion carbon black, 25 parts of light calcium carbonate, 4 parts of active magnesium oxide, 0.5 parts of accelerator Na-22, 2 parts of antioxidant 4010NA, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of accelerator TMTD, and 10 parts of plasticizer.

[0037] The adhesive for the adhesion-enhancing layer of the airbag main body adhesive tape includes 70 parts of chloroprene rubber, 30 parts of natural rubber, 25 parts of precipitated silica, 4 parts of active magnesium oxide, 5 parts of zinc oxide, 1 part of accelerator TMTD, 2.5 parts of antioxidant 1010, 1 part of accelerator DM, and 4 parts of adhesive A.

[0038] The glue for airbag patch includes 70 parts of natural rubber, 30 parts of chloroprene rubber, 1 part of sulfur, 5 parts of zinc oxide, 1 part of stearic acid, 25 parts of semi-reinforcing carbon black, 10 parts of precipitated white carbon black, 1 part of antioxidant A, 1 part of antioxidant RD, 0.8 part of accelerator CZ, 1 part of paraffin, and 2 parts of adhesive RS.

[0039] The rubber used for airbag molding liquid includes 100 parts of chloroprene rubber, 0.5 parts of spray carbon black, 5 parts of zinc oxide, 20 parts of precipitated white carbon black, 4 parts of active magnesium oxide, and 1 part of antioxidant A.

[0040] [1] The preparation process of the prepared airbag main body adhesive tape includes: (1) Mix the ingredients according to the proportions of the airbag main body rubber; (2) The chloroprene rubber is put into the internal mixer for plastication for 1 to 2 minutes; (3) Put magnesium oxide and antioxidant into internal mixer for 1-2 minutes; (4) Add the reinforcing agent and plasticizer into the internal mixer for 8 to 10 minutes; (5) The masterbatch is obtained by rubber removal, and the temperature of rubber removal is not higher than 130°C; (6) The masterbatch is left for more than 8 hours. After hot refining, it is filtered through a rubber filter with two layers of 40×60 mesh copper mesh. The head temperature is 60~70℃ and the body temperature is 40~50℃. (7) Add zinc oxide and accelerator on the open mill for 6 to 8 minutes, and make the airbag main body mixed rubber through thinning, sheeting and cooling; (8) Mix the ingredients according to the proportions of the adhesive used in the adhesion-enhancing layer of the main adhesive tape; (9) Add natural rubber and chloroprene rubber to the open mill and plasticize for 5 to 7 minutes; (10) Add magnesium oxide and antioxidant on the mixing mill for 10 to 12 minutes; (11) Add reinforcing agent on the mixing mill for 15 to 18 minutes; (12) The masterbatch should be stored for more than 8 hours. After hot refining, it should be filtered through a rubber filter with two layers of 60×60 mesh copper mesh. The head temperature should be 70~80℃ and the body temperature should be 50~60℃. (13) Add zinc oxide, accelerator and adhesive on an open mill for 6 to 8 minutes, and make the rubber material for the adhesion-enhancing layer of the airbag main body rubber tape by thin-passing, sheeting and cooling; (14) The rubber material for the adhesive layer of the airbag main body adhesive tape and the solvent (gasoline: ethyl ester = 7:3) are stirred in a mixing tank at a ratio of 1:2-3 to prepare an adhesive liquid for the adhesive layer of the airbag main body adhesive tape; (15) Spraying the aramid cloth with ethyl acetate twice for pretreatment, and drying it twice after pretreatment; (16) Add 2% by weight of the airbag main body adhesive tape viscosity enhancing liquid to the RFE and mix well, then use a glue coating machine to apply glue on both sides of the aramid cloth; (17) After drying the double-sided glue-coated aramid cloth twice, the airbag main body glue is hung on both sides of the airbag main body glue-coated cloth using a three-roll calender, and the thickness of the adhesive tape is 0.75~0.85mm; (18) The airbag main body tape is vulcanized using a vulcanizing tank with a vulcanization temperature of 141~145℃, a vulcanization time of 30~40×45×5min, and an air pressure of 0.4MPa.

[0041] [2] The preparation process of the prepared airbag patch includes: (1) Prepare the ingredients according to the proportions described in the adhesive for airbag patch; (2) Add natural rubber and chloroprene rubber to the mixing mill and plasticize for 5 to 7 minutes; (3) Add stearic acid and antioxidant on the open mill for 8 to 10 minutes; (4) Add reinforcing agent on the mixing mill for 10-12 minutes; leave the masterbatch for more than 8 hours, and filter it through a 2-layer 40×60 mesh copper screen on a rubber filter after hot refining. The head temperature is 70-80°C and the body temperature is 50-60°C. (5) Add vulcanizing agent, accelerator and adhesive on the open mill for 6 to 8 minutes, and make the rubber material for patch by thinning, unrolling and cooling; (6) Stirring the rubber material for airbag patch and solvent (gasoline:ethyl ester = 1:1) in a mixing tank at a ratio of 1:2.5-3.5 to prepare an airbag patch adhesive solution; (7) Use a glue coating machine to apply the airbag patch glue on the brocade silk twice on each side; (8) After the coated cloth is dried twice, a three-roll calender is used to coat the airbag patch with adhesive on both sides to make the airbag patch. The thickness of the adhesive tape is 0.45-0.5 mm. (9) The airbag patch is vulcanized in a vulcanizer at a vulcanization temperature of 143-145°C, a vulcanization time of 10×45×5min, and an air pressure of 0.3MPa; (10) Cut the airbag patch into 30 mm wide strips and apply hemp on one side.

[0042] [3] The preparation process of the prepared fragile parts includes: (1) Stir the airbag main body mixed rubber and solvent (gasoline: ethyl ester = 1:1) in a mixing tank at a ratio of 1:2.5~3 to prepare a breakable part glue solution; (2) Use a glue coating machine to apply the glue for the easily broken parts on a fine flat cloth, 2 to 3 times on each side, with a thickness of 1.3 to 1.5 mm; (3) The vulcanization of the tape for easily broken parts uses a drum vulcanizer with a vulcanization temperature of 145~155℃, a vulcanization time of 20~50min, and a vulcanization pressure of 12~15MPa; (4) Cut the vulcanized tape into strips as breakable parts; (5) Double-sided hemp-marking of easily-broken parts with a width of 50 mm on one side.

[0043] [4] The preparation process of the airbag molding glue solution includes: (1) Prepare the ingredients according to the proportions of the rubber used in the airbag molding glue; (2) Add chloroprene rubber to the open mill and plasticize for 3 to 5 minutes; (3) Add magnesium oxide and antioxidant on the mixing mill for 5 to 8 minutes; (4) Add reinforcing agent on the open mill for 10-12 minutes, and make the molding glue liquid through thinning, sheeting and cooling; (5) The mixed rubber and solvent (gasoline: ethyl ester = 1:1) are stirred in a mixing tank at a ratio of 1:2.5~3 to prepare a molding rubber solution.

[0044] [5] The preparation process of the prepared airbag flange includes: (1) After hot-mixing the airbag main body rubber on an open mixing mill, put it into a special mold together with the uncured airbag main body tape, with 4 to 6 layers of tape on the flange plane and 2 layers of tape on the flange vertical surface. The vertical surface tape is sandwiched between the flat surface tapes, and the two sides of the tape are evenly attached to the airbag main body film; (2) Use a flat vulcanizing machine and a special mold for compression vulcanization. The vulcanization temperature is 145~155℃, the vulcanization time is 60~90min, and the vulcanization pressure is 12~15MPa.

[0045] (3) Evenly distribute 12 φ18 mm through holes on the flange according to the interface size, and avoid the installation grooves for easily broken parts.

[0046] [6] The main preparation process of the thin-walled drainage airbag prepared includes: (1) According to the structural dimensions of the product, cut the main body tape of the airbag, including the top cover sheet (1 piece), top cover side sheets (2 pieces), transition side sheets (2 pieces), and main body side sheets (2 pieces); (2) Use a hemp-beating machine to beat the cut tape. The inner edge of the top cover is beat with a width of 45mm and the outer side is all beat with hemp; the inner side of the top cover side pieces are beat with a clockwise width of 15mm, 15mm, 65mm, and 45mm respectively, and the inner side is beat with a clockwise width of 45mm, 45mm, 15mm, and 15mm respectively; the inner side of the transition side pieces are beat with a clockwise width of 15mm, 15mm, 15mm, and 45mm respectively, and the inner side is beat with a clockwise width of 65mm, 45mm, 45mm, and 15mm respectively; the inner side of the main body side pieces are beat with a clockwise width of 45mm, 15mm, 45mm, and 45mm respectively, and the inner side is beat with a clockwise width of 15mm, 45mm, 15mm, and 15mm respectively; (3) Use a beating stick to bead the outer upper edge of the flange vertical surface with a width of 30 mm; (4) Use gasoline to clean the pitted surface; (5) Add 1.5-3‰ thioacetamide to the prefabricated molding glue, stir evenly and use it as the adhesive for molding the thin-wall drainage airbag; (6) Apply the adhesive twice and wait for 30 minutes for it to completely dry. Then, assemble the top cover side piece, transition side piece, and main body side piece. Use a single-sided hemp patch to assemble the inner and outer lap joints. (7) After the adhesive is applied twice and allowed to dry completely for 30 minutes, the top cover sheet, top cover side sheet, transition side sheet, main body side sheet and flange are manually bonded in sequence, and the inner and outer lap joints are bonded with a patch with single-sided hemp patch; (8) Evenly brush and stick the easily broken parts on the inner side of the top cover made of fiberglass and carbon fiber composite; (9) The fiberglass and carbon fiber composite top cover, which has been painted 2 to 3 times and dried, is attached to the molded airbag.

[0047] (10) The airbag is vulcanized in a vulcanization tank with a vulcanization temperature of 143~145℃, a vulcanization time of 10×30×5min, and an air pressure of 0.4MPa.

[0048] (11) The airbag is folded in an orderly manner into a top cover made of fiberglass and carbon fiber composite, and the easily broken parts are bonded to the flange with an adhesive to obtain a thin-walled drainage airbag.

Claims

1. A method for preparing a thin-walled high-strength composite drainage airbag, characterized in that: The drainage airbag prepared by the method comprises an airbag top cover, an airbag body, a rubber flange, and a breakable part; the airbag top cover is made of glass fiber reinforced plastic and carbon fiber composite material, and a water push surface is formed during the drainage process to discharge water in the cabin. After the water is discharged, the top cover is located on the inner side of the drainage hole; the airbag body is bonded with high-strength double-sided rubber fabric, and double-layer reinforcement is performed at the edge of the airbag top cover; the rubber flange is made of high-strength fabric, and double-layer reinforcement is performed on the bottom of the vertical surface; the breakable part is made of low-strength fabric, one end of which is bonded between the airbag body and the top cover, and the other end is bonded / pressed in the reserved groove of the rubber flange; The specific preparation steps include: (1) Preparing the airbag main body rubber compound; (2) Preparation of adhesive solution for airbag main body adhesive tape: (3) Preparing airbag main body tape; (4) preparing airbag patch adhesive solution; (5) preparing airbag patch; (6) Preparation of fragile parts; (7) Preparing molding glue; (9) Preparation of rubber flange; (10) Tape cutting and taping: Cut the airbag main body tape according to the cutting template, including the top cover top sheet, top cover side sheet, transition side sheet, and main body side sheet; (11) Airbag molding: Add 1.5-3‰ thioacetamide to the prefabricated molding glue, stir evenly and use it as the adhesive for the molding of thin-walled drainage airbags; clean the hemp-beaten film with gasoline, apply the adhesive 2-3 times and dry it, then manually stick the top cover, top cover side pieces, transition side pieces, main body side pieces and flanges in sequence, and stick the inner and outer lap joints with a single-sided hemp-beaten patch; stick the easily broken parts evenly on the inner side of the fiberglass reinforced plastic and carbon fiber composite top cover; stick the fiberglass reinforced plastic and carbon fiber composite top cover that has been applied 2-3 times and dried on the formed airbag; (12) Airbag vulcanization: The airbag is vulcanized in a vulcanization tank; (13) Airbag integration: The airbag is folded in an orderly manner into the top cover made of fiberglass and carbon fiber composite, and the easily breakable parts are bonded to the flange with adhesive to obtain a thin-walled drainage airbag.

2. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The method for preparing the airbag main body mixed rubber comprises the following steps: putting chloroprene rubber into an internal mixer for plastication, putting magnesium oxide and an anti-aging agent into the internal mixer; putting a reinforcing agent and a plasticizer into the internal mixer; discharging the rubber to obtain a masterbatch; adding zinc oxide and an accelerator on an open mixer, and preparing the airbag main body mixed rubber through thinning, sheeting, and cooling.

3. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The method for preparing the adhesive liquid for enhancing the viscosity of the airbag main body adhesive tape comprises the following steps: adding natural rubber and chloroprene rubber to plasticize on an open mill; adding magnesium oxide and an antioxidant on the open mill; adding a reinforcing agent on the open mill; adding zinc oxide, an accelerator and an adhesive on the open mill; thinning, sheeting and cooling to prepare an adhesive material for an adhesive layer of the airbag main body adhesive tape; and stirring the adhesive material for the adhesive layer of the airbag main body adhesive tape and a solvent in a stirring tank to prepare the adhesive liquid for the airbag main body adhesive tape.

4. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The method for preparing the airbag main body adhesive tape comprises pre-treating the aramid cloth with ethyl ester, drying the cloth, and coating the cloth with glue; adding 2% by weight of the airbag main body adhesive tape viscosity-enhancing adhesive liquid to RFE and stirring the mixture evenly, and then coating the aramid cloth with glue on both sides by using a glue coating machine; heat-refining the airbag main body mixed rubber, drying the double-sidedly coated aramid cloth, and coating the airbag main body adhesive cloth with glue on both sides by using a three-roll calender to prepare the airbag main body adhesive tape; and vulcanizing the airbag main body adhesive tape.

5. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The method for preparing the adhesive liquid for airbag patch comprises the following steps: adding natural rubber and chloroprene rubber on an open mill for plasticization; adding stearic acid and an antioxidant on the open mill; adding a reinforcing agent on the open mill; adding a vulcanizing agent, an accelerator and an adhesive on the open mill, and preparing the adhesive material for patch through thin-passing, sheeting and cooling; and stirring the adhesive material for airbag patch and a solvent in a stirring tank to prepare the adhesive liquid for airbag patch.

6. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The preparation of the airbag patch comprises: using a glue coating machine to coat the glue liquid of the airbag patch on the brocade silk; after the glued cloth is dried, using a three-roll calender to coat the glue on both sides of the airbag patch to make the airbag patch; vulcanizing the airbag patch in a vulcanizing tank, cutting the airbag patch into wide tape strips, and single-sided hemp-binding the strips.

7. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The method for preparing the breakable part comprises the following steps: mixing the airbag main body mixed rubber and a solvent in a mixing tank to prepare a breakable part glue liquid; coating the breakable part glue liquid on a fine flat cloth by a glue coating machine; vulcanizing the breakable part adhesive tape by a drum vulcanizing machine, and cutting the vulcanized adhesive tape into adhesive tape strips as the breakable part.

8. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The method for preparing the molding adhesive liquid comprises the following steps: adding chloroprene rubber to plasticize on an open mill; adding magnesium oxide and an anti-aging agent on the open mill; adding a reinforcing agent on the open mill; thinning, sheeting, and cooling to prepare a molding adhesive liquid mixed rubber; and stirring the mixed rubber and a solvent in a stirring tank to prepare the molding adhesive liquid.

9. The method for preparing a thin-walled high-strength composite drainage airbag according to claim 1, characterized in that: The rubber flange is prepared by placing the airbag main body rubber and unvulcanized airbag main body tape into a special mold, wherein the flange plane has 4 to 6 layers of tape, the flange vertical surface has 2 layers of tape, the vertical surface tape is sandwiched between the plane tapes, the two sides of the tape are evenly attached to the airbag main body film, and the molding is vulcanized.

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