WO2019035609A1 - 차량용 에어백 하우징 및 이의 제조방법 - Google Patents
차량용 에어백 하우징 및 이의 제조방법 Download PDFInfo
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- WO2019035609A1 WO2019035609A1 PCT/KR2018/009217 KR2018009217W WO2019035609A1 WO 2019035609 A1 WO2019035609 A1 WO 2019035609A1 KR 2018009217 W KR2018009217 W KR 2018009217W WO 2019035609 A1 WO2019035609 A1 WO 2019035609A1
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- Prior art keywords
- composite material
- reinforced composite
- fiber reinforced
- cft
- vehicle
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003733 fiber-reinforced composite Substances 0.000 claims abstract description 116
- 239000000463 material Substances 0.000 claims abstract description 112
- 239000000835 fiber Substances 0.000 claims description 62
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- 230000002787 reinforcement Effects 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 239000004952 Polyamide Substances 0.000 claims description 13
- 239000004743 Polypropylene Substances 0.000 claims description 13
- 229920002647 polyamide Polymers 0.000 claims description 13
- 229920001155 polypropylene Polymers 0.000 claims description 13
- 238000001746 injection moulding Methods 0.000 claims description 11
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
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- 238000010030 laminating Methods 0.000 claims description 5
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 4
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 229920000515 polycarbonate Polymers 0.000 claims 1
- 239000004417 polycarbonate Substances 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 9
- 239000012779 reinforcing material Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 6
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14631—Coating reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
- B29L2022/02—Inflatable articles
- B29L2022/027—Air bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23504—Inflatable members characterised by their material characterised by material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23533—Inflatable members characterised by their material characterised by the manufacturing process
Definitions
- a vehicle air bag housing including a laminated continuous fiber reinforced composite material (L-CFT) and a method of manufacturing an air bag housing for a vehicle.
- L-CFT laminated continuous fiber reinforced composite material
- the airbag housing is required to have impact resistance against high pressure when the airbag is deployed.
- the existing airbag housing is mainly made of steel material, which is heavy compared with other materials and may cause a bell mouth malfunction that causes the housing to open when the airbag is deployed.
- the airbag housing by forming the airbag housing with a steel material, mold design cost and material cost are increased, and when the collision energy is not absorbed by the airbag cushion in a high-speed collision, there is a problem that the occupant's injury may be increased.
- a fiber reinforced composite material has been applied to an airbag housing.
- a method of injection-molding a fiber-reinforced composite material by using a steel material or a weaving-type fiber-reinforced composite material as an insert material is being studied.
- these materials are used as the insert material, the effect of weight reduction is insufficient and injection molding is difficult in a complicated shape, so that an increase in the process cost is inevitable and the degree of freedom in molding is remarkably lowered.
- An object of the present invention is to provide a method of manufacturing an air bag housing for a vehicle, which can secure excellent strength and rigidity, and at the same time, can achieve molding freedom, dimensional stability, and cost reduction.
- a method of producing a laminated continuous fiber reinforced composite material comprising: (a) laminating a continuous fiber reinforced composite material (CFT) comprising a thermoplastic resin and continuous fibers; (b) preheating the laminated continuous fiber reinforced composite material (L-CFT); And (c) inserting the preheated laminated continuous fiber reinforced composite material (L-CFT) into an injection mold and injection-molding a fiber reinforced composite material (FT) comprising a thermoplastic resin and fibers.
- a method of manufacturing a housing can be provided.
- a vehicle airbag housing manufactured by the above-described method for manufacturing an airbag for a vehicle and satisfying the following formula 1 can be provided.
- G 1 / G 2 in the above formula 1 represents the ratio of the fiber reinforcement contained in the fiber reinforced composite material (FT) to the fiber reinforcement contained in the laminated continuous fiber reinforced composite material (L-CFT)
- the content of the fiber reinforcement contained in the composite material (L-CFT) is divided by the content of the fiber reinforcement contained in the fiber reinforced composite material (FT).)
- the method for manufacturing an air bag housing for a vehicle according to the present invention is characterized in that injection molding is performed using a laminated continuous fiber reinforced composite material (L-CFT) as an insert material to improve moldability, dimensional stability, and cost reduction
- L-CFT laminated continuous fiber reinforced composite material
- FIG. 1 is a flowchart showing a method of manufacturing an air bag housing for a vehicle according to an embodiment of the present invention.
- a method of manufacturing an airbag housing for a vehicle according to the present invention comprises:
- S10 a laminated continuous fiber reinforced composite material (L-CFT) by laminating a continuous fiber reinforced composite material (CFT) comprising a thermoplastic resin and continuous fibers;
- the vehicle airbag housing can be manufactured by injecting a laminated continuous fiber reinforced composite material (L-CFT) into an insert material through a fiber reinforced composite material (FT) through the method for manufacturing the airbag housing for a vehicle.
- L-CFT laminated continuous fiber reinforced composite material
- FT fiber reinforced composite material
- L-CFT laminated continuous fiber reinforced composite material
- CFT continuous fiber reinforced composite materials
- FT fiber reinforced composite material
- the step (a) includes a step (S10) of producing a laminated continuous fiber reinforced composite material (L-CFT) by laminating a continuous fiber reinforced composite material (CFT) comprising a thermoplastic resin and continuous fibers, to be.
- L-CFT laminated continuous fiber reinforced composite material
- CFT continuous fiber reinforced composite material
- the continuous fiber reinforced composite material may include a thermoplastic resin and a fiber reinforcement in the form of a continuous fiber.
- the thermoplastic resin may be selected from at least one of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA), acrylonitrile butadiene styrene copolymer . More preferably, at least one of PP (polypropylene), PA (polyamide), and combinations thereof is selected, and it is easy to impregnate the fiber reinforcing material, and strength and rigidity can be improved.
- PP polypropylene
- PE polyethylene
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- PA polyamide
- acrylonitrile butadiene styrene copolymer More preferably, at least one of PP (polypropylene), PA (polyamide), and combinations thereof is selected, and it is easy to impregnate the fiber reinforcing material, and strength and rigidity can be improved.
- the continuous fibers include at least one fiber reinforcement selected from the group consisting of glass fibers, carbon fibers, and combinations thereof.
- the continuous fibers include at least one fiber reinforcing material selected from the group consisting of glass fibers, carbon fibers, and combinations thereof, to improve the strength and rigidity of the air bag housing for a vehicle, .
- the continuous fiber means that the continuous fiber is present in a continuous form within the interior of the air bag housing, depending on the final size of the manufactured air bag housing.
- the continuous fibers can be produced in a continuous process, such as continuous fibers in a UD sheet, and by continuously supplying the continuous fibers to the continuous process, a continuous fiber reinforced composite material (CFT). ≪ / RTI >
- the continuous fiber reinforced composite material may be made of a product having a specific shape such as a sheet.
- the continuous fiber has a certain range of length depending on the shape of the product.
- the length of such a specific range should be regarded as having 'continuity' in that it can be arbitrarily adjusted in the manufacturing process in which continuous fibers are continuously fed, and most of the continuous fibers such as UD sheets or continuous fibers in the fabric , It has continuity without breaking inside the product.
- the continuous fiber reinforced composite material may include 40 to 50% by weight of the thermoplastic resin and 50 to 60% by weight of continuous fibers.
- the continuous fibers are contained in the range below the above range, it is difficult to secure the strength and rigidity required in the airbag housing for a vehicle. If the continuous fibers are beyond the above range, the thermoplastic resin is not sufficiently impregnated, The manufacture of the air bag housing for a vehicle may cause a problem that is impossible in itself.
- the cross-section of the continuous fibers may have an average diameter of from about 15 ⁇ ⁇ to about 20 ⁇ ⁇ , for example, from about 16 ⁇ ⁇ to about 19 ⁇ ⁇ .
- the number of laminated continuous fiber reinforced composite materials (L-CFT) in the step (a) is not limited, it is preferable to laminate at least three continuous fiber reinforced composite materials (CFT) Composite material (L-CFT) can be manufactured. Preferably from 3 to 15 sheets, more preferably from 5 to 10 sheets, because it is possible to realize excellent strength and rigidity as an insert material. When stacking less than three sheets, sufficient strength and rigidity can not be realized, and if more than 15 sheets are stacked, a problem of increased process cost due to cost increase may occur.
- the laminated continuous fiber reinforced composite material may form a pattern in which a single continuous fiber reinforced composite material (CFT) is laminated at at least one angle selected from the range of 0 to 90 degrees.
- the stacked patterns may be laminated by the same or different stacked sheets of continuous fiber reinforced composite materials (CFT). For example, when 10 continuous fiber reinforced composite materials (CFT) are laminated, five sheets may be stacked at 0 degree (degrees), and the remaining five sheets may be stacked at 90 degrees (orthogonal). In addition, they may be laminated so as to cross each other at 0 degree (degrees), +45 degrees (degrees), 90 degrees (degrees), -45 degrees (degrees), and 0 degrees (degrees).
- the step (b) is a step (S20) of preheating the laminated continuous fiber reinforced composite material (L-CFT).
- the preheating temperature is preferably 200 to 230 ⁇ ⁇ , more preferably 220 to 230 ⁇ ⁇ , which is effective in improving workability.
- the preheating temperature is less than 200 ° C, the preheating is not sufficiently performed, and the bonding strength between the laminated continuous fiber reinforced composite material (L-CFT) and the fiber reinforced composite material (FT) may be lowered.
- the reinforced composite material (L-CFT) is deteriorated, and the strength and rigidity of the reinforced composite material (L-CFT) may be deteriorated when manufacturing the air bag housing for a vehicle.
- the thickness of the laminated continuous fiber reinforced composite material may be 0.9 to 4.5 mm, and more preferably 1.5 to 3.0 mm. It is preferable to have a thickness range of the above range in order to have sufficient strength and rigidity in utilizing the insert as an insert material for a vehicle airbag housing.
- the thickness of the laminated continuous fiber reinforced composite material is less than 0.9 mm, the strength and stiffness of the insert material may be lowered and the durability of the final vehicle air bag housing may be deteriorated. There is a fear that the property may deteriorate.
- the step (c) is a step (S30) of inserting the preheated laminated continuous fiber reinforced composite material (L-CFT) into an injection mold and injection molding a fiber reinforced composite material (FT) comprising a thermoplastic resin and fibers .
- L-CFT fiber-reinforced composite material
- the fiber reinforced composite material may include a thermoplastic resin and a fibrous reinforcement in the form of fiber.
- the thermoplastic resin may be selected from at least one of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA), acrylonitrile butadiene styrene copolymer . More preferably, at least one of PP (polypropylene), PA (polyamide), and combinations thereof is selected, and it is easy to impregnate the fiber reinforcing material, and strength and rigidity can be improved.
- PP polypropylene
- PE polyethylene
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- PA polyamide
- acrylonitrile butadiene styrene copolymer More preferably, at least one of PP (polypropylene), PA (polyamide), and combinations thereof is selected, and it is easy to impregnate the fiber reinforcing material, and strength and rigidity can be improved.
- the fibers included in the fiber reinforced composite material (FT) are included in order to improve the strength and rigidity of the airbag housing for a vehicle, And combinations thereof.
- the fiber reinforced composite material may include 60 to 80% by weight of the thermoplastic resin and 20 to 40% by weight of the fibers.
- the fiber is included in the range below the above range, it is difficult to secure the strength and rigidity required in the airbag housing for a vehicle, and in the case of exceeding the above range, the fluidity is lowered and the degree of freedom of molding may decrease.
- the average length of the fibers is not limited, but is preferably 5 to 50 mm, and more preferably 10 to 40 mm, which is effective in improving the strength and rigidity without decreasing the fluidity during injection molding.
- the length of the average fiber is less than 5 mm, the viscosity of the fiber-reinforced composite material (FT) composition to be injected is too high to lower the formability.
- the average fiber length is more than 50 mm, the mechanical properties of strength and stiffness may deteriorate.
- the injection temperature is preferably 200 to 230 ⁇ ⁇ , more preferably 220 to 230 ⁇ ⁇ , which is advantageous in that it is easy to mold the air bag housing for a vehicle because of excellent processability. If the injection temperature is less than 200 ° C, the bonding strength between the laminated continuous fiber reinforced composite material (L-CFT) and the fiber-reinforced composite material (FT) to be injected is insufficient, and the strength and rigidity of the vehicle air bag housing may be deteriorated. If the temperature is higher than 230 ° C, the fiber reinforced composite material (FT) may be deteriorated and the durability of the vehicle air bag housing may be deteriorated.
- L-CFT laminated continuous fiber reinforced composite material
- FT fiber-reinforced composite material
- Another embodiment of the present invention is to provide a vehicle airbag housing which is manufactured according to the above-described manufacturing method and satisfies the following formula (1).
- G 1 / G 2 in the above formula 1 represents the ratio of the fiber reinforcing material contained in the fiber reinforced composite material (FT) to the fiber reinforcing material contained in the laminated continuous fiber reinforced composite material (L-CFT)
- the content of fiber reinforcement contained in reinforced composite material (L-CFT) is divided by the content of fiber reinforcement contained in fiber reinforced composites (FT).)
- the strength and rigidity of the vehicle airbag housing can be improved more effectively.
- the value of G 1 / G 2 is less than 1.0, the content of the fiber reinforcing material contained in the fiber reinforced composite material (FT) becomes excessively high, so that it is difficult to reduce the weight of the product and the flowability thereof may be deteriorated. There is a possibility of decrease.
- the value of G 1 / G 2 is more than 5.0, the content of the fiber reinforcing material contained in the fiber reinforced composite material (FT) is too small, so that sufficient strength and rigidity required for the vehicle air bag housing can not be achieved have.
- the impact strength of the automotive airbag housing according to the present invention may be from about 10 J / mm to about 100 J / mm. Specifically, the impact strength of the automotive airbag housing may be about 10 J / mm to about 50 J / mm, and more specifically about 10 J / mm to about 30 J / mm.
- the 'peak impact strength' is a 'surface impact strength' measured by an arbitrary object that is resistant to an instantaneous concentrated external force and is further measured on the surface of the object, and can be measured by the method of measuring an impact resistance according to ASTM D3763 have. If the fall impact strength is less than the above range, it is difficult to ensure sufficient impact performance, so that durability may deteriorate when the airbag is deployed. Therefore, such a structure is difficult to apply to parts requiring excellent impact performance, such as a vehicle airbag housing.
- the flexural strength of the automotive airbag housing according to the present invention can be from about 200 MPa to about 600 MPa, and in particular, from about 210 MPa to about 500 MPa.
- the flexural strength is the maximum strength generated from the specimen when the specimen is pressed at a constant speed and can be measured by the ASTM D790 method at room temperature 23 ° C.
- the flexural modulus of the vehicle airbag housing according to the present invention may be from about 10 GPa to about 50 GPa, and in particular, from about 10 GPa to about 40 GPa. Flexural modulus can be measured by the ASTM D790 method at room temperature 23 ° C as a measure of how much the material can be rolled without permanent deformation and fracture.
- the airbag housing for a vehicle of the present invention is manufactured by injection-molding a fiber reinforced composite material (FT) using the laminated continuous fiber reinforced composite material (L-CFT) as an insert material and has excellent strength and rigidity, Can also show improvement in dimensional stability.
- FT fiber reinforced composite material
- L-CFT laminated continuous fiber reinforced composite material
- CFT continuous fiber reinforced composite materials containing 40% by weight of a polypropylene homopolymer resin and 60% by weight of continuous fibers were laminated at 0 degree and pressed to form a 1.8 mm laminated continuous fiber reinforced composite material (L- CFT).
- the laminated continuous fiber reinforced composite material (L-CFT) was preheated at 230 DEG C for 60 seconds and fixed to an injection mold.
- 70 wt% of polypropylene homopolymer resin and 30 wt% (L-CFT) was manufactured by injecting a fiber-reinforced composite material (FT) containing carbon fibers and carbon fibers in an amount of 0.1 to 5 wt.% And under pressure conditions of 230 DEG C and 350 tons.
- FT fiber-reinforced composite material
- the laminated continuous fiber reinforced composite material was preheated at 280 ⁇ for 60 seconds and then fixed in an injection mold.
- 60 wt% of a polyamide homopolymer resin and 40 wt% (L-CFT) was manufactured by injecting a fiber-reinforced composite material (FT) containing a polyolefin-based continuous fiber reinforced composite material (L-CFT) at a temperature of 280 DEG C and a pressure of 350 tons.
- FT fiber-reinforced composite material
- L-CFT polyolefin-based continuous fiber reinforced composite material
- Example 2 As shown in the following Table 1, in the same manner as in Example 1 except that a weft-type continuous fiber reinforced composite material having a thickness of 1.8 mm was used as the insert material in place of the laminated continuous fiber reinforced composite material (L-CFT) The airbag housing was manufactured and physical properties were measured according to the following evaluation method, and it is shown in Table 2.
- FT fiber-reinforced composite material
- the properties of the airbag housing for a vehicle were evaluated according to the following experimental examples.
- the bending strength and flexural modulus of the airbag housing were measured at a room temperature of 23 DEG C according to the flexural property measurement method (ASTM D790 method). The results are shown in Table 2 below.
- the impact resistance of the automobile airbag housing was measured at a room temperature of 23 ⁇ according to the method of measuring the impact strength of the impact resistance (ASTM D3763 method). The results are shown in Table 2 below.
- Examples 2 to 3 were produced by injection molding a laminated continuous fiber reinforced composite material (L-CFT) into an insert material by a fiber reinforced composite material (FT) in a specific pattern to manufacture a vehicle air bag housing
- L-CFT laminated continuous fiber reinforced composite material
- FT fiber reinforced composite material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Textile Engineering (AREA)
- Air Bags (AREA)
- Reinforced Plastic Materials (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
실시예 1 | 실시예 2 | 실시예 3 | 비교예 1 | 비교예 2 | ||
적층형 연속 섬유 강화 복합 소재 (L- CFT ) | 열가소성 수지 ( wt% ) | PP 40 | PP 40 | PA 40 | 직조형 연속섬유 강화복합 소재 | - |
섬유보강재 ( wt% ) | 60 | 60 | 60 | |||
두께(mm) | 1.8 | 1.8 | 1.2 | |||
패턴(°) | 0 | 0/90/0/0/90/0 또는 90/0/90/90/0/90 | 0/90/90/0 또는 90/0/0/90 | |||
예열온도(℃) | 230 | 230 | 280 | |||
섬유 강화 복합 소재 (FT) | 열가소성 수지 ( wt% ) | 60 | 60 | 60 | 60 | 60 |
섬유보강재 ( wt% ) | 40 | 40 | 40 | 40 | 40 | |
섬유 길이(mm) | 30 | 30 | 30 | 30 | 30 | |
사출온도(℃) | 230 | 230 | 280 | 230 | 230 | |
G1/G2 | 1.5 | 1.5 | 1.5 | - | - |
굴곡 특성 | 낙구충격강도 [J/㎜] | ||
굴곡강도 [ MPa ] | 굴곡탄성률 [ GPa ] | ||
실시예 1 | 249 | 12.5 | 12.2 |
실시예 2 | 436 | 17.3 | 22.1 |
실시예 3 | 381 | 27.2 | 12.5 |
비교예 1 | 392 | 15.5 | 19.9 |
비교예 2 | 145 | 7.6 | 5.1 |
Claims (11)
- (a) 열가소성 수지 및 연속섬유를 포함하는 연속섬유 강화복합소재(CFT)를 적층하여 적층형 연속섬유 강화복합재료(L-CFT)를 제조하는 단계;(b) 상기 적층형 연속섬유 강화복합소재(L-CFT)를 예열하는 단계; 및(c) 상기 예열된 적층형 연속섬유 강화복합소재(L-CFT)를 사출 금형에 인서트하고, 열가소성 수지 및 섬유를 포함하는 섬유강화복합소재(FT)를 사출 성형하는 단계; 를 포함하는차량용 에어백 하우징의 제조방법.
- 제1항에 있어서,상기 열가소성 수지는 PP(polypropylene), PE(polyethylene), PET(polyethylene terephthalate), PBT(polybutylene terephthalate), PA(polyamide), ABS(acrylonitrile butadiene styrene copolymer) 및 PC(polycarbonate)-ABS 중 적어도 하나 선택되는차량용 에어백 하우징의 제조방법.
- 제1항에 있어서,상기 연속섬유 및 섬유는 유리 섬유, 탄소 섬유 및 이들의 조합으로 이루어진 군으로부터 선택된 하나 이상을 포함하는차량용 에어백 하우징의 제조방법.
- 제1항에 있어서,상기 연속섬유 강화복합소재(CFT)는 상기 열가소성 수지 40 내지 50중량% 및 연속섬유 50 내지 60중량% 포함하는차량용 에어백 하우징의 제조방법.
- 제1항에 있어서,상기 섬유 강화복합소재(FT)는 상기 열가소성 수지 60 내지 80중량% 및 섬유 20 내지 40중량% 포함하는차량용 에어백 하우징의 제조방법.
- 제1항에 있어서,상기 (b) 단계의 예열온도 및 상기 (c) 단계의 사출온도는 200 내지 230℃인차량용 에어백 하우징의 제조방법.
- 제1항에 있어서,상기 (a) 단계의 적층은 0 내지 90도(°) 범위에서 선택되는 적어도 1개 이상의 각도가 적층되는 패턴을 형성하는차량용 에어백 하우징의 제조방법.
- 제1항에 있어서,상기 (b) 단계의 적층형 연속섬유 강화복합소재(L-CFT)의 두께는 0.9 내지 4.5mm이며,상기 (c) 단계에서 섬유의 길이는 5 내지 50mm 인차량용 에어백 하우징의 제조방법.
- 제 1항 내지 제 8항에서 선택되는 어느 한 항의 제조방법으로 제조되며, 하기 식 1를 만족하는차량용 에어백 하우징.1.0 ≤ G1/G2 ≤ 5.0 [식 1](상기 식 1에서 G1/G2 는 적층형 연속섬유 강화복합소재(L-CFT)에 포함된 섬유보강재에 대한 섬유강화복합소재(FT)에 포함된 섬유보강재의 비율을 나타낸 것으로 적층형 연속섬유 강화복합소재(L-CFT)에 포함된 섬유보강재의 함량을 섬유강화복합소재(FT)에 포함된 섬유보강재의 함량으로 나눈 값이다.)
- 제 9항에 있어서,상기 차량용 에어백 하우징은 ASTM D3763 규격에 의하여 측정된 낙구충격강도가 10 J/mm 내지 100 J/mm 인 차량용 에어백 하우징.
- 제 9항에 있어서,상기 차량용 에어백 하우징은 상온 23℃에서 ASTM D790 규격에 의하여 측정된 굴곡탄성률이 10 GPa 내지 50 GPa인 차량용 에어백 하우징.
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US11560111B2 (en) | 2019-03-29 | 2023-01-24 | Mcpp Innovation Llc | All TPO airbag assemblies |
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KR20080023791A (ko) * | 2006-09-12 | 2008-03-17 | (주)삼박 | 강화 연속섬유 함침시트가 포함된 자동차 부품 및 그제조방법 |
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KR100814861B1 (ko) * | 2004-04-30 | 2008-03-20 | (주)삼박 | 열가소성 복합 판재를 이용하여 제조된 물품 |
KR20130045908A (ko) * | 2006-11-22 | 2013-05-06 | 후쿠이 켄 | 열가소성 수지 보강 시트재, 열가소성 수지 다층 보강 시트재 및 그 제조 방법, 및 열가소성 수지 다층 보강 성형품 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US11560111B2 (en) | 2019-03-29 | 2023-01-24 | Mcpp Innovation Llc | All TPO airbag assemblies |
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