WO2018019288A1 - 一种用于汽车的安全气囊门盖板 - Google Patents

一种用于汽车的安全气囊门盖板 Download PDF

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Publication number
WO2018019288A1
WO2018019288A1 PCT/CN2017/094880 CN2017094880W WO2018019288A1 WO 2018019288 A1 WO2018019288 A1 WO 2018019288A1 CN 2017094880 W CN2017094880 W CN 2017094880W WO 2018019288 A1 WO2018019288 A1 WO 2018019288A1
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WIPO (PCT)
Prior art keywords
layer
skin
instrument panel
door cover
airbag door
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Application number
PCT/CN2017/094880
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English (en)
French (fr)
Inventor
张方林
王磊磊
孙洁
罗玉雯
Original Assignee
上海延锋金桥汽车饰件系统有限公司
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Publication date
Application filed by 上海延锋金桥汽车饰件系统有限公司 filed Critical 上海延锋金桥汽车饰件系统有限公司
Priority to EP17833591.5A priority Critical patent/EP3492322B1/en
Publication of WO2018019288A1 publication Critical patent/WO2018019288A1/zh
Priority to US16/259,199 priority patent/US10682975B2/en

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    • 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
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • 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
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/18—Slush casting, i.e. pouring moulding material into a hollow mould with excess material being poured off
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/22—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed 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
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3008—Instrument panels
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3038—Air bag covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2274/00—Thermoplastic elastomer material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles

Definitions

  • the invention belongs to the technical field of automobile processing and molding, and particularly relates to an airbag door cover for an automobile.
  • the interior environment of the car is directly related to the physical and mental feelings of the drivers and passengers.
  • the interior emphasizes touch, feel, comfort and appreciation.
  • the semi-rigid soft instrument panel is filled with polyurethane foam between the skin and the skeleton, which not only improves the touch, but also gives a comfortable and luxurious feeling, and at the same time has the function of absorbing collision energy, and is mostly used in medium and high-end cars.
  • the demand for sub-balloon instrument panels has increased, and the dashboards of more and more models have been designed as seamless airbag dashboards. There is no visible wiring, and the airbag can be normally opened.
  • a tear line of the airbag is processed in the airbag area on the opposite side of the instrument panel to ensure that the airbag can be flushed out of the instrument panel after the explosion.
  • the surface material of the automobile instrument panel is easy to be brittle at low temperature, the mechanical properties will be greatly reduced after long-term aging. Combining these factors, the skin and foam of the seamless airbag instrument panel are easily broken and flicked during the low-temperature blasting process. There are security risks to drivers and passengers. Therefore, as people's safety requirements for automobiles continue to increase, it is necessary to continuously enhance the low temperature performance of automotive airbag door covers.
  • Patent US20110028625A1 describes a plasticized skin powder formulation and a method for its manufacture, which incorporates a modified plasticizer such as linear trimellitate, modified adipate, heat stabilizer, light in a PVC suspension resin. Stabilizers, etc., blended in a high-speed mixing equipment to improve the formulation of the plastic powder, the glass transition temperature can be reduced to minus 50 degrees, and the mechanical properties remain good after long-term aging test, no debris flying out at low temperature blasting, but the patent The disadvantage is that the process is more complicated. In addition to the conventional automotive interior molding process, special blending equipment is added, which is costly.
  • a modified plasticizer such as linear trimellitate, modified adipate, heat stabilizer, light in a PVC suspension resin.
  • Stabilizers, etc. blended in a high-speed mixing equipment to improve the formulation of the plastic powder, the glass transition temperature can be reduced to minus 50 degrees, and the mechanical properties remain good after long-term aging test, no debris flying out at low temperature blasting, but
  • Patent US7560515B2 describes a plasticized skin powder formulation and a method for its manufacture, which adds a partially crosslinked polyolefin elastomer to a plastic powder, the glass transition temperature can be reduced to minus 60 degrees, and a long period aging test The post-mechanical performance remains good, and there is no debris flying out at low temperature blasting.
  • the disadvantage of this patent is that the process is complicated. In addition to the conventional automotive interior product molding process, special mixing equipment is added, and the cost is high.
  • the existing automotive airbag door cover generally has poor low-temperature performance, and the raw material modification in order to avoid the safety hazard caused by this has higher requirements on equipment investment and a longer production cycle.
  • the object of the present invention is to provide an airbag door cover for an automobile, thereby solving the defect that the airbag door cover of the prior art has a safety hazard due to the low temperature performance during the blasting process, and the skin and the foam are easily broken and fly out. .
  • An airbag door cover for an automobile comprising: an instrument panel skeleton arranged in sequence, a foam layer, and a skin layer of the instrument panel, and a reinforcement layer laminated on the skin layer of the instrument panel.
  • the reinforcing layer is located between the foam layer and the skin layer of the instrument panel, wherein the composite skin and the reinforcing layer of the instrument panel further have a thickness throughout the reinforcing layer and a partial thickness of the skin layer of the instrument panel. Epidermal weakening line.
  • the skin weakening line is a weakening line obtained by weakening after the reinforcing layer and the skin layer of the instrument panel are combined.
  • the dashboard skeleton layer is made of a polypropylene composite material.
  • the foam layer is produced by reacting an isocyanate with a polyether polyol to obtain a polyurethane foam.
  • the reinforcing layer is an aqueous polyurethane coating, a two-component reactive type aliphatic polyurethane, a two-component reactive aromatic polyurethane, a polyurea, an acrylic elastomer, an aromatic TPU (Thermoplastic polyurethanes, a thermoplastic polyurethane elastomer rubber). And one or a combination of any of aliphatic TPU and TPO (Thermoplastic polyolefin).
  • the dashboard skin layer is formed of a plastic powder selected from the group consisting of polyvinyl chloride, a thermoplastic polyurethane elastomer, and a thermoplastic polyolefin elastomer.
  • the skin weakening line also extends through the entire thickness of the skeleton layer and the foam layer.
  • the skin weakening line is obtained by weakening after the reinforcing layer, the dashboard skin layer, the foam layer and the skeleton layer are combined.
  • a reinforcing layer is added between the skin layer and the foam layer, and the reinforcing layer and the skin are combined and weakened together, which simplifies the process cycle of the modification of the raw material of the automobile dashboard and reduces the production cost;
  • a reinforcing layer is added between the skin layer and the foam layer.
  • the reinforcing layer and the skin are combined and weakened together.
  • the breaking strength and elongation at break of the weakened line remain unchanged, and the fracture strength and fracture of the skin around the weakened line are maintained.
  • the increase in elongation enhances the low-temperature bursting performance of the airbag, reduces the risk of the skin of the instrument panel and the breakage of the foam, and greatly enhances the safety of the occupants.
  • FIG. 1 is a cross-sectional view of an airbag door cover in accordance with a preferred embodiment of the present invention
  • FIG. 2 is a cross-sectional view of an airbag door cover in accordance with another preferred embodiment of the present invention.
  • an airbag door cover includes: an instrument panel skeleton layer 1 disposed in order from the bottom to the top, a foam layer 2, and a reinforcing layer 3 And an instrument panel skin layer 4, wherein the reinforcing layer 3 is composited on the instrument panel skin layer 4, and the composite instrument panel skin layer 4 and the reinforcing layer 3 further have the entire thickness of the reinforcing layer 3 and the instrument panel skin layer 4
  • the partial thickness of the epidermis weakens the line 5.
  • a skeleton weakening line 6 is also provided below the dashboard skeleton layer 1. The distance from the top of the skin weakening line 5 to the skin surface of the skin layer 4 of the instrument panel is the residual thickness of the weakening line, as shown by H in FIG.
  • the skin weakening line 5 is obtained by cold knife weakening after the reinforcing layer 3 and the instrument panel skin layer 4 are combined.
  • an airbag door cover includes: an instrument panel skeleton layer 1 disposed in order from bottom to top, a foam layer 2, and reinforced Layer 3 and instrument panel skin layer 4, wherein the reinforcing layer 3 is composited on the instrument panel skin layer 4, and the airbag door cover plate also has the entire thickness of the instrument panel skeleton layer 1, the foam layer 2, the reinforcing layer 3, and the instrument panel.
  • the skin weakening line 5' is obtained by laser weakening or hot knife weakening after the reinforcing layer 3, the instrument panel skin layer 4, the foam layer 2 and the skeleton layer 1 are compounded together.
  • the dashboard skeleton layer 1 is fabricated from a polypropylene composite.
  • the foam layer 2 of the present invention is produced by reacting an isocyanate with a polyether polyol to obtain a polyurethane foam.
  • the reinforcing layer 3 of the present invention is an aqueous polyurethane, a two-component reactive aliphatic polyurethane, a two-component reactive aromatic polyurethane, a polyurea, an acrylic elastomer, an aromatic TPU, and a fat.
  • aqueous polyurethane a two-component reactive aliphatic polyurethane
  • a two-component reactive aromatic polyurethane a polyurea
  • an acrylic elastomer an aromatic TPU
  • a fat a fat.
  • TPUs and TPOs One or a combination of any of a group of TPUs and TPOs.
  • the instrument panel skin layer 4 coated with the above reinforcing layer 3 material and the airbag door panel having the sprayed instrument panel skin layer 4 are respectively tested, indicating that the reinforcing layer 3 material is compared with other polyurethane materials.
  • solvent-based polyurethane coating can meet the requirements of debris-free splashing during airbag door blasting.
  • the water-based polyurethane was sprayed on the non-appearance surface of the PVC plastic skin, and the PVC plastic coated skin coated with the water-based polyurethane coating was subjected to a multi-axis impact test of minus 35 degrees.
  • the weight of the impact head was 11.81 kg, and the diameter of the impact ball was 12.8 mm. 2.2m/s, the impact energy curve was obtained, and the impact energy value was recorded at 70,909 joules.
  • the state of the epidermis after the impact was observed, and no debris was generated. At this point, the test of the PVC plastic skin coated with the waterborne polyurethane coating was completed.
  • the PVC plastic skin coated with the water-based polyurethane coating is connected to the dashboard frame by foaming and weakening process to manufacture the instrument panel assembly, and then the instrument panel assembly is loaded into the airbag blasting test at minus 35 degrees. After the blasting, no skin fragments flew out, which greatly enhanced the safety of the occupants.
  • the water-based polyurethane coating can effectively enhance the low temperature performance of the PVC plastic skin, and can meet the deployment requirements of the airbag door cover having the PVC plastic skin.
  • the two-component reactive aliphatic polyurethane was sprayed on the non-design surface of the PVC plastic skin, and the PVC plastic skin coated with the two-component reactive aliphatic polyurethane coating was subjected to a multi-axis impact test of minus 35 degrees, and the impact head was used.
  • the weight is 11.81kg
  • the impact ball diameter is 12.8mm
  • the impact speed is 2.2m/s
  • the impact energy curve is obtained.
  • the impact energy value is recorded as 79814 joules, and the epidermis state after the impact is observed, and no debris is generated. So far, the test of the PVC plastic skin coated with the two-component reactive aliphatic polyurethane coating was completed.
  • the PVC plastic skin coated with the two-component reactive aliphatic polyurethane coating is connected to the dashboard skeleton by a foaming and weakening process to be manufactured into an instrument panel assembly, and then the instrument panel assembly is loaded into the vehicle.
  • Degree of airbag blasting test no scalp debris flying out after blasting, greatly enhancing the safety of drivers and passengers.
  • the two-component reactive aliphatic polyurethane coating can effectively enhance the low temperature performance of the PVC plastic skin, and can meet the deployment requirements of the airbag door cover having the PVC plastic skin.
  • the two-component reactive aromatic polyurethane was sprayed on the non-design surface of the PVC plastic skin, and the PVC plastic skin coated with the two-component reactive aromatic polyurethane coating was subjected to a multi-axis impact test of minus 35 degrees, and the impact head was used.
  • the weight is 11.81kg
  • the impact ball diameter is 12.8mm
  • the impact speed is 2.2m/s
  • the impact energy curve is obtained.
  • the impact energy value is recorded as 79814 joules, and the epidermis state after the impact is observed, and no debris is generated. So far, the test of the PVC plastic skin coated with the two-component reactive aromatic polyurethane coating was completed.
  • the PVC plastic skin coated with the two-component reactive aromatic polyurethane coating is connected to the dashboard skeleton by a foaming and weakening process to manufacture the instrument panel assembly, and then the instrument panel assembly is loaded into the car.
  • Degree of airbag blasting test no scalp debris flying out after blasting, greatly enhancing the safety of drivers and passengers.
  • the two-component reactive aromatic polyurethane coating can effectively enhance the low temperature performance of the PVC plastic skin, and can meet the requirements for the deployment of the airbag door cover having the PVC plastic skin.
  • the polyurea was sprayed on the non-design surface of the PVC plastic skin, and the PVC plastic coated skin coated with polyurea coating was subjected to a multi-axis impact test of minus 35 degrees.
  • the weight of the impact head was 11.81 kg, and the diameter of the impact ball was 12.8mm, impact velocity 2.2m / s, get the impact energy curve, record the impact energy value of 78245 joules, observe the epidermis state after the impact, no debris is produced. At this point, the test of the PVC plastic coated skin coated with polyurea coating was completed.
  • the PVC plastic coated skin coated with polyurea coating is connected to the dashboard skeleton by foaming and weakening process to manufacture the instrument panel assembly, and then the instrument panel assembly is loaded into the airbag blasting test at minus 35 degrees. After the blasting, no skin fragments flew out, which greatly enhanced the safety of the occupants.
  • the acrylic elastomer was sprayed on the non-appearing surface of the PVC plastic skin, and the PVC plastic coated skin coated with the acrylic elastomer coating was subjected to a multi-axis impact test of minus 35 degrees.
  • the weight of the impact head was 11.81 kg, and the diameter of the impact ball was 12.8. Mm, the impact velocity was 2.2 m/s, and the impact energy curve was obtained.
  • the impact energy value was recorded at 78,425 joules, and the state of the epidermis after the impact was observed, and no debris was generated. So far, the test of the PVC plastic skin coated with the acrylic elastomer coating was completed.
  • the PVC plastic skin coated with the acrylic elastomer coating is connected to the instrument panel skeleton by a foaming and weakening process to manufacture an instrument panel assembly, and then the instrument panel assembly is loaded into an airbag of minus 35 degrees. In the blasting test, no scallops flew out after blasting, which greatly enhanced the safety of the occupants.
  • the aromatic TPU was sprayed on the non-design surface of the PVC plastic skin, and the PVC plastic coated skin coated with the aromatic TPU coating was subjected to a multi-axis impact test of minus 35 degrees.
  • the weight of the impact head was 11.81 kg, and the diameter of the impact ball was 12.8 mm.
  • the impact velocity was 2.2 m/s, and the impact energy curve was obtained.
  • the impact energy value was recorded at 80,146 joules, and the state of the epidermis after the impact was observed, and no debris was generated. At this point, the test of the PVC plastic skin coated with an aromatic TPU coating was completed.
  • the PVC plastic skin coated with the aromatic TPU coating is connected to the instrument panel skeleton by a foaming and weakening process to manufacture the instrument panel assembly, and then the instrument panel assembly is loaded for the airbag blasting of minus 35 degrees. In the test, no scallops flew out after blasting, which greatly enhanced the safety of the occupants.
  • the coated PVC plastic skin was subjected to a multi-axis impact test of minus 35 degrees.
  • the impact head weight was 11.81 kg
  • the impact ball diameter was 12.8 mm
  • the impact speed was 2.2 m/s.
  • the impact energy curve was obtained and the impact energy value was recorded at 81,358 joules.
  • the state of the epidermis after the impact, no debris was produced. At this point, the test of the PVC plastic skin coated with the aliphatic TPU coating was completed.
  • the PVC plastic skin coated with the aliphatic TPU coating is connected to the instrument panel skeleton through a foaming and weakening process to manufacture an instrument panel assembly, and then the instrument panel assembly is loaded for an airbag blasting of minus 35 degrees. In the test, no scallops flew out after blasting, which greatly enhanced the safety of the occupants.
  • the TPO was sprayed on the non-design surface of the PVC plastic skin.
  • the PVC plastic coated skin coated with TPO coating was subjected to a multi-axis impact test of minus 35 degrees.
  • the weight of the impact head was 11.81 kg
  • the diameter of the impact ball was 12.8 mm
  • the impact speed was 2.2 m. /s
  • the impact energy curve was obtained, and the impact energy value was recorded at 81,024 joules.
  • the state of the epidermis after the impact was observed, and no debris was generated. At this point, the test of the PVC plastic skin coated with the TPO coating was completed.
  • the PVC plastic skin coated with the TPO coating is connected to the dashboard skeleton by a foaming and weakening process to manufacture the instrument panel assembly, and then the instrument panel assembly is loaded into the airbag blasting test at minus 35 degrees. No scallops flew out after blasting, greatly enhancing the safety of the occupants.
  • the solvent-based polyurethane was sprayed on the non-design surface of the PVC plastic skin, and the PVC plastic skin coated with the solvent-based polyurethane was subjected to a multi-axis impact test of minus 35 degrees.
  • the weight of the impact head was 11.81 kg, and the diameter of the impact ball was 12.8 mm. 2.2m/s, the impact energy curve was obtained, and the impact energy value was 57618 joules.
  • the epidermis state after the impact was observed, and a large amount of debris was found. So far, the test of the PVC plastic skin coated with the solvent-based polyurethane was completed.
  • the PVC plastic skin coated with the solvent-based polyurethane coating is connected to the dashboard frame by a foaming and weakening process to manufacture the instrument panel assembly, and then the instrument panel assembly is loaded into the airbag for blasting at minus 35 degrees.
  • the test found that 1.3 g of the epidermis flew out to the passenger side after the blast, which is likely to cause damage to the passengers.
  • the low temperature performance of the skin can not meet the deployment requirements of the airbag door cover with such a PVC plastic skin.
  • the water-based polyurethane, the two-component reactive aliphatic polyurethane, the two-component reactive aromatic polyurethane, the polyurea, the acrylic elastomer, the aromatic TPU, the aliphatic TPU and the TPO can effectively enhance the PVC plastic skin.
  • the low temperature performance can meet the deployment requirements of the airbag door cover with this PVC plastic skin.
  • any combination of waterborne polyurethane, two-component reactive aliphatic polyurethane, two-component reactive aromatic polyurethane, polyurea, acrylic elastomer, aromatic TPU, aliphatic TPU and TPO can also effectively enhance PVC ⁇ The low temperature performance of the plastic skin can meet the requirements for the deployment of the airbag door cover with such a PVC plastic skin.
  • the molding powder of the skin layer 4 of the forming instrument panel may be polyvinyl chloride (PVC), thermoplastic polyurethane elastomer (TPU), and thermoplastic polyolefin elastomer (TPO), etc.
  • PVC polyvinyl chloride
  • TPU thermoplastic polyurethane elastomer
  • TPO thermoplastic polyolefin elastomer
  • the skin layer 4 of the instrument panel of the present invention is a PVC plastic skin.
  • the reinforcing layer 3 is a cellulose tackifier modified aqueous polyurethane.

Abstract

一种用于汽车的安全气囊门盖板，包括：依次设置的仪表板骨架层(1)，泡沫层(2)，以及仪表板表皮层(4)，还包括复合在仪表板表皮层(4)上的加强层(3)，所述加强层(3)位于所述泡沫层(2)和仪表板表皮层(4)之间，其中，复合在一起的仪表板表皮层(4)和加强层(3)上还具有依次贯穿所述加强层(3)的整个厚度以及仪表板表皮层(4)的部分厚度的表皮弱化线(5)。该安全气囊门盖板加强了安全气囊低温爆破性能，减少了仪表板表皮层和泡沫断裂飞出的风险，极大地增强了驾乘人员的安全性。

Description

一种用于汽车的安全气囊门盖板 技术领域
本发明属于汽车加工成型技术领域，具体涉及一种用于汽车的安全气囊门盖板。
背景技术
汽车的内部环境直接与驾乘人员的身心感受密切相关，内饰强调触觉、手感、舒适性和观赏性等。半硬泡软质仪表板是在表皮和骨架之间填充有聚氨酯泡沫，既提高触感，给人一种舒适豪华的感觉，同时又具有吸收碰撞能量的功能，多用于中高档车上。随着人们对汽车内饰件的外观、功能及安全性的要求越来越高，副气囊式仪表板的需求加大，越来越多车型的仪表板被设计为无缝安全气囊仪表板，既无可视装接线，又能保证气囊正常开启，在仪表板反面气囊区加工出一条气囊撕裂线以确保气囊爆炸后能从仪表板中冲出来。
由于汽车仪表板表皮材料在低温下容易发脆，长周期老化后机械性能也会大大降低，综合这些因素，导致无缝安全气囊仪表板在低温爆破过程中，表皮和泡沫容易碎裂飞出，对驾乘人员产生安全隐患。因此，随着人们对汽车安全要求的不断提高，需要不断增强汽车安全气囊门盖板的低温性能。
专利US20110028625A1介绍了一种搪塑表皮粉末配方及其制造方法，该专利在PVC悬浮树脂中添加改性增塑剂，如线性偏苯三酸酯，改性己二酸酯，热稳定剂，光稳定剂等，在高速混合设备中共混得到改进搪塑粉末配方，其玻璃化转变温度可以降低至零下50度，并且长周期老化试验后力学性能保持良好，低温爆破没有碎片飞出，但是该专利的缺点是过程较复杂，除了常规的汽车内饰产品成型工艺外，还要增加特殊的共混设备，成本较高。
专利US7560515B2介绍了一种搪塑表皮粉末配方及其制造方法，该专利在搪塑粉末中添加部分交联的聚烯烃弹性体，其玻璃化转变温度可以降低至零下60度，并且长周期老化试验后力学性能保持良好，低温爆破没有碎片飞出，但是该专利的缺点是过程较复杂，除了常规的汽车内饰产品成型工艺外，还要增加特殊的混合设备，成本较高。
综上所述，现有汽车安全气囊门盖板普遍低温性能较差，为了避免由此带来的安全隐患进行的原材料改性又对设备投入要求较高，并且生产周期较长。
发明内容
本发明的目的是提供一种用于汽车的安全气囊门盖板，从而解决现有技术中安全气囊门盖板由于低温性能差在爆破过程中表皮和泡沫容易碎裂飞出产生安全隐患的缺陷。
为了解决上述技术问题，本发明采用以下技术方案：
提供一种用于汽车的安全气囊门盖板，该安全气囊门盖板包括：依次设置的仪表板骨架，泡沫层，以及仪表板表皮层，还包括复合在仪表板表皮层上的加强层，所述加强层位于所述泡沫层和仪表板表皮层之间，其中，复合在一起的仪表板表皮层和加强层上还具有贯穿所述加强层的整个厚度以及仪表板表皮层的部分厚度的表皮弱化线。
所述表皮弱化线是在加强层和仪表板表皮层复合在一起之后进行弱化得到的弱化线。
所述仪表板骨架层由聚丙烯复合材料制造而成。
所述泡沫层由异氰酸酯与聚醚多元醇反应得到聚氨酯泡沫制造而成。
所述加强层为水性聚氨酯涂层、双组份反应型份脂肪族聚氨酯、双组份反应型份芳香族聚氨酯、聚脲、丙烯酸类弹性体、芳香族TPU(Thermoplastic polyurethanes，热塑性聚氨酯弹性体橡胶)、脂肪族TPU和TPO(Thermoplastic polyolefin，热塑性聚烯烃弹性体)中的一种或任意几种的组合。
所述仪表板表皮层由选自聚氯乙烯、热塑性聚氨酯弹性体和热塑性聚烯烃弹性体中的一种的搪塑粉料成型。
所述表皮弱化线还贯穿所述骨架层和泡沫层的整个厚度。
所述表皮弱化线是在加强层、仪表板表皮层、泡沫层和骨架层复合在一起之后进行弱化得到的。
本发明相对现有技术所具有的有益效果主要在于：
(1)在表皮层和泡沫层中间增加了加强层，加强层和表皮复合后再一起进行弱化，简化了汽车仪表板原材料改性的工艺周期，降低生产成本；
(2)在表皮层和泡沫层中间增加了加强层，加强层和表皮复合后再一起进行弱化，弱化线的断裂强度和断裂延伸率度保持不变，弱化线周围区域表皮的断裂强度和断裂延伸率上升，加强了安全气囊低温爆破性能，减少了仪表板表皮层和泡沫断裂飞出的风险，极大增强了驾乘人员的安全。
附图说明
参考随后的作为本发明的典型实施例示出的附图，本发明将更容易理解，但不应将其理解为对本发明范围的限制。
图1是根据本发明的一个优选实施方式的安全气囊门盖板的横截面视图；
图2是根据本发明的另一个优选实施方式的安全气囊门盖板的横截面视图。
其中，主要附图标记的含义如下：
1、仪表板骨架层 2、泡沫层 3、加强层 4、仪表板表皮层 5，5’、表皮弱化线 6、骨架弱化线 H、弱化线残余厚度
具体实施方式
下面结合附图，给出本发明的较佳实施例，并予以详细描述，使能更好地理解本发明的功能、特点。
如图1所示，是根据本发明的一个优选实施例的安全气囊门盖板，该安全气囊门盖板包括：从下往上依次设置的仪表板骨架层1，泡沫层2，加强层3以及仪表板表皮层4，其中，加强层3复合在仪表板表皮层4上，复合在一起的仪表板表皮层4和加强层3上还具有贯穿加强层3的整个厚度以及仪表板表皮层4的部分厚度的表皮弱化线5。仪表板骨架层1的下方还设有骨架弱化线6。该表皮弱化线5的顶部到仪表板表皮层4皮纹面的距离为弱化线残余厚度，如图1中H所示。
在该优选实施例中，所述表皮弱化线5是在加强层3和仪表板表皮层4复合在一起之后进行冷刀弱化得到的。
如图2所示，是根据本发明的另一个优选实施例的安全气囊门盖板，该安全气囊门盖板包括：从下往上依次设置的仪表板骨架层1，泡沫层2，加强 层3以及仪表板表皮层4，其中，加强层3复合在仪表板表皮层4上，气囊门盖板上还具有贯穿仪表板骨架层1、泡沫层2、加强层3的整个厚度以及仪表板表皮层4的部分厚度的表皮弱化线5’。该表皮弱化线5’的顶部到仪表板表皮层4皮纹面的距离为弱化线残余厚度，如图2中H所示。
在该优选实施例中，所述表皮弱化线5’是在加强层3、仪表板表皮层4、泡沫层2和骨架层1复合在一起之后进行激光弱化或热刀弱化得到的。
根据本发明的一优选实施例，仪表板骨架层1由聚丙烯复合材料制造而成。
根据本发明的一个优选实施例，本发明中泡沫层2由异氰酸酯与聚醚多元醇反应得到聚氨酯泡沫制造而成。
根据本发明的一个优选实施例，本发明中加强层3为水性聚氨酯、双组份反应型脂肪族聚氨酯、双组份反应型芳香族聚氨酯、聚脲、丙烯酸类弹性体、芳香族TPU、脂肪族TPU和TPO中的一种或任意几种的组合。
下面通过将喷涂了上述加强层3材料的仪表板表皮层4以及具有这种喷涂后的仪表板表皮层4的安全气囊门盖板分别进行测试，说明上述加强层3材料相较于其它聚氨酯材料(例如溶剂型聚氨酯涂层)能够满足安全气囊门爆破过程中无碎片飞溅的要求。
(1)水性聚氨酯
将水性聚氨酯喷涂于PVC搪塑表皮的非外观面，将喷涂有水性聚氨酯涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值70909焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有水性聚氨酯涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有水性聚氨酯涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
综上所述，通过水性聚氨酯涂层能有效增强PVC搪塑表皮的低温性能，能满足具有这种PVC搪塑表皮的安全气囊门盖板的展开要求。
(2)双组份反应型脂肪族聚氨酯
将双组份反应型脂肪族聚氨酯喷涂于PVC搪塑表皮的非外观面，将喷涂有双组份反应型脂肪族聚氨酯涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值79814焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有双组份反应型脂肪族聚氨酯涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有双组份反应型脂肪族聚氨酯涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
综上所述，通过双组份反应型脂肪族聚氨酯涂层能有效增强PVC搪塑表皮的低温性能，能满足具有这种PVC搪塑表皮的安全气囊门盖板的展开要求。
(3)双组份反应型芳香族聚氨酯
将双组份反应型芳香族聚氨酯喷涂于PVC搪塑表皮的非外观面，将喷涂有双组份反应型芳香族聚氨酯涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值79814焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有双组份反应型芳香族聚氨酯涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有双组份反应型芳香族聚氨酯涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
综上所述，通过双组份反应型芳香族聚氨酯涂层能有效增强PVC搪塑表皮的低温性能，能满足具有这种PVC搪塑表皮的安全气囊门盖板的展开要求。
(4)聚脲
将聚脲喷涂于PVC搪塑表皮的非外观面，将喷涂有聚脲涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径 12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值78245焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有聚脲涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有聚脲涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
(5)丙烯酸类弹性体
将丙烯酸类弹性体喷涂于PVC搪塑表皮的非外观面，将喷涂有丙烯酸类弹性体涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值78245焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有丙烯酸类弹性体涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有丙烯酸类弹性体涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
(6)芳香族TPU
将芳香族TPU喷涂于PVC搪塑表皮的非外观面，将喷涂有芳香族TPU涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值80146焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有芳香族TPU涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有芳香族TPU涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
(7)脂肪族TPU
将脂肪族TPU喷涂于PVC搪塑表皮的非外观面，将喷涂有脂肪族TPU 涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值81358焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有脂肪族TPU涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有脂肪族TPU涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
(8)TPO
将TPO喷涂于PVC搪塑表皮的非外观面，将喷涂有TPO涂层的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值81024焦耳，观察冲击后的表皮状态，没有碎片产生。至此，喷涂有TPO涂层的PVC搪塑表皮的测试结束。
另外，将喷涂有TPO涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，爆破后没有表皮碎片飞出，极大地增强了驾乘人员的安全性。
(9)溶剂型聚氨酯
将溶剂型聚氨酯喷涂于PVC搪塑表皮的非外观面，将喷涂有溶剂型聚氨酯的PVC搪塑表皮进行零下35度的多轴冲击测试，冲击头重量11.81kg，冲击球直径12.8mm，冲击速度2.2m/s，得到冲击能量曲线图，记录冲击能量值57618焦耳，观察冲击后的表皮状态，发现有大量碎片产生。至此，喷涂有溶剂型聚氨酯的PVC搪塑表皮的测试结束。
另外，将喷涂有溶剂型聚氨酯涂层的PVC搪塑表皮通过发泡和弱化工艺与仪表板骨架连接从而制造成仪表板总成，然后将仪表板总成装车进行零下35度的安全气囊爆破试验，发现爆破后有1.3g的表皮朝乘客侧飞出，很可能会对乘客造成伤害。
根据上述试验结果可知，通过溶剂型聚氨酯涂层不能有效增强PVC搪塑 表皮的低温性能，也就不能满足具有这种PVC搪塑表皮的安全气囊门盖板的展开要求。而本申请中水性聚氨酯、双组份反应型脂肪族聚氨酯、双组份反应型芳香族聚氨酯、聚脲、丙烯酸类弹性体、芳香族TPU、脂肪族TPU和TPO则能够有效增强PVC搪塑表皮的低温性能，也就能够满足具有这种PVC搪塑表皮的安全气囊门盖板的展开要求。继而水性聚氨酯、双组份反应型脂肪族聚氨酯、双组份反应型芳香族聚氨酯、聚脲、丙烯酸类弹性体、芳香族TPU、脂肪族TPU和TPO的任意几种组合也能够有效增强PVC搪塑表皮的低温性能，也就能够满足具有这种PVC搪塑表皮的安全气囊门盖板的展开要求。
根据本发明的一个优选实施例，成型仪表板表皮层4的搪塑粉料可以为聚氯乙烯(PVC)、热塑性聚氨酯弹性体(TPU)和热塑性聚烯烃弹性体(TPO)等，该搪塑粉料既能够生产形状复杂的产品，而且皮纹纹理均匀美观，手感柔软舒适，表皮内应力小，厚度均匀，具有良好的弹性及低收缩率，良好的机械性能，良好的耐老化性能。
根据本发明的又一优选实施例，本发明中仪表板表皮层4为PVC搪塑表皮。
根据本发明的一个优选实施例，加强层3为纤维素增粘剂改性的水性聚氨酯。
上述实施例仅供说明本发明之用，而并非是对本发明的限制，有关技术领域的普通操作人员，在不脱离本发明范围的情况下，还可以做出各种变化和变形，因此所有等同的技术方案也应属于本发明的范畴，本发明的专利保护范围应由各权利要求限定。

Claims (9)

  1. 一种用于汽车的安全气囊门盖板，该安全气囊门盖板包括：依次设置的仪表板骨架层(1)，泡沫层(2)，以及仪表板表皮层(4)，其特征在于，还包括复合在仪表板表皮层(4)上的加强层(3)，所述加强层(3)位于所述泡沫层(2)和仪表板表皮层(4)之间，其中，复合在一起的仪表板表皮层(4)和加强层(3)上还具有贯穿所述加强层(3)的整个厚度以及仪表板表皮层(4)的部分厚度的表皮弱化线(5)。
  2. 根据权利要求1所述的安全气囊门盖板，其特征在于，所述仪表板骨架层(1)由聚丙烯复合材料制造而成。
  3. 根据权利要求1所述的安全气囊门盖板，其特征在于，所述泡沫层(2)由异氰酸酯与聚醚多元醇反应得到聚氨酯泡沫制造而成。
  4. 根据权利要求1所述的安全气囊门盖板，其特征在于，所述加强层(3)为水性聚氨酯、双组份反应型脂肪族聚氨酯、双组份反应型芳香族聚氨酯、聚脲、丙烯酸类弹性体、芳香族TPU、脂肪族TPU和TPO中的一种或任意几种的组合。
  5. 根据权利要求1所述的安全气囊门盖板，其特征在于，所述加强层(3)为纤维素增粘剂改性的水性聚氨酯。
  6. 根据权利要求1所述的安全气囊门盖板，其特征在于，所述仪表板表皮层(4)由选自聚氯乙烯、热塑性聚氨酯弹性体和热塑性聚烯烃弹性体中的一种的搪塑粉料成型。
  7. 根据权利要求1所述的安全气囊门盖板，其特征在于，所述表皮弱化线(5)是在加强层(3)和仪表板表皮层(4)复合在一起之后进行弱化得到的弱化线。
  8. 根据权利要求1所述的安全气囊门盖板，其特征在于，所述表皮弱化线(5)还贯穿所述骨架层(1)和泡沫层(2)的整个厚度。
  9. 根据权利要求8所述的安全气囊门盖板，其特征在于，所述表皮弱化线(5)是在加强层(3)、仪表板表皮层(4)、泡沫层(2)和骨架层(1)复合在一起之后进行弱化得到的。
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