WO2022138264A1 - 車両用内装材及びシートバックパネル - Google Patents

車両用内装材及びシートバックパネル Download PDF

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Publication number
WO2022138264A1
WO2022138264A1 PCT/JP2021/045747 JP2021045747W WO2022138264A1 WO 2022138264 A1 WO2022138264 A1 WO 2022138264A1 JP 2021045747 W JP2021045747 W JP 2021045747W WO 2022138264 A1 WO2022138264 A1 WO 2022138264A1
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WIPO (PCT)
Prior art keywords
vehicle interior
base material
layer
interior material
thickness
Prior art date
Application number
PCT/JP2021/045747
Other languages
English (en)
French (fr)
Inventor
一貴 福井
Original Assignee
寿屋フロンテ株式会社
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Publication date
Application filed by 寿屋フロンテ株式会社 filed Critical 寿屋フロンテ株式会社
Priority to EP21910413.0A priority Critical patent/EP4269178A1/en
Priority to CN202180044192.4A priority patent/CN116490400A/zh
Priority to US18/015,896 priority patent/US20230249596A1/en
Priority to JP2022572159A priority patent/JPWO2022138264A1/ja
Publication of WO2022138264A1 publication Critical patent/WO2022138264A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
    • B60N2/7011—Upholstery springs ; Upholstery of substantially two-dimensional shape, e.g. hammock-like, plastic shells, fabrics
    • 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
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    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary 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
    • 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
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    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B32B5/265—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer
    • B32B5/266—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer next to one or more non-woven fabric layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B32B5/275—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one woven fabric layer next to a non-woven fabric layer
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    • B32B9/025—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch comprising leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B9/046—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
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Definitions

  • This application relates to vehicle interior materials and seat back panels using them.
  • Patent Document 1 describes a press-molded body that can be used as a vehicle seat back.
  • the press-molded body of Patent Document 1 is obtained by fixing the skin to a non-woven fabric via an adhesive layer, and Patent Document 1 describes that natural leather, synthetic leather, fabric, or the like is used as the skin. Has been done.
  • the material used as the interior material for vehicles such as the seat back panel has both the strength as the interior material and the high-class appearance.
  • the press-molded body described in Patent Document 1 is intended to ensure ease of sewing and strength, it does not focus on improving the appearance of luxury, and there is room for improvement in this respect. Remains.
  • the present application provides an improved vehicle interior material and a seat back panel formed by using the improved vehicle interior material so as to achieve both good appearance and sufficient strength for the purpose of solving the above problems. be.
  • An example of one vehicle interior material in the present application is a laminated structure including at least a base material and a skin layer.
  • the average horizontal surface roughness of the substrate is RSm (mm)
  • the Young's modulus of the substrate at 80 ° C is E1_80
  • the thickness of the substrate is d1 (mm)
  • the Young's modulus of the epidermis layer at 80 ° C is E2_80.
  • Gpa when the thickness is d2 (mm), it is configured to satisfy the relationship of the following formulas (1) and (2).
  • the seat back panel as another form of the present application is formed by using the vehicle interior material of any form of the present application.
  • the thickness of the skin layer is adjusted according to the surface roughness of the base material within the range where sufficient strength can be secured by the base material. Therefore, it is possible to improve the appearance of the vehicle interior material while ensuring sufficient strength. Further, by using the seat back panel formed by using the vehicle interior material for the vehicle seat, the space inside the vehicle can be made luxurious.
  • FIG. 1 is a diagram showing an example of a seat arranged in a vehicle.
  • the vehicle interior material 10 according to the present embodiment is used as a material for the seat back panel 2 of the vehicle seat 1, for example, as shown in FIG.
  • the seat back panel 2 is particularly conspicuous in front of the person sitting in the back seat, and occupies a large area in the passenger compartment. Therefore, by applying the vehicle interior material 10 according to the present embodiment to the seat back panel 2, the appearance of the vehicle interior space can be effectively enhanced.
  • the vehicle interior material 10 can be suitably used for other parts installed in the vehicle, particularly a part that is touched by human hands or a part that is easily noticed by humans.
  • the vehicle interior material 10 is used as a material constituting all or a part of, for example, a dashboard, an instrument panel, a door trim, a pillar trim, a rear parcel shelf, and the like, in addition to the seat back panel. Can be used.
  • FIG. 2 is a diagram schematically showing a cross-sectional configuration of an interior material for a vehicle according to the present embodiment.
  • the vehicle interior material 10 is a laminated structure in which a base material 11 and a skin layer 12 are bonded together.
  • the base material 11 As the base material 11, a relatively light material whose composition has been adjusted so as to secure the required rigidity is used, and the base material 11 secures sufficient strength of interior parts for vehicles. Further, the base material 11 is formed by using a material that is at least lighter (smaller in density) than the skin layer 12. Specifically, as the material of the base material 11, for example, felt such as fiber, compressed felt and knitted felt, or a foamed resin such as urethane foam and a hollow structure of resin (for example, a honeycomb structure) are used. Further, the base material 11 may have a structure in which felt, resin or the like are laminated.
  • the epidermis layer 12 is made of, for example, synthetic leather containing PVC (polyvinyl chloride).
  • the synthetic leather containing PVC includes a synthetic leather made of only PVC and a synthetic leather containing PVC as a main component.
  • synthetic leather containing PVC as a main component include those in which a resin such as nylon or polyurethane is coated on the surface of PVC.
  • the skin layer 12 may be made of synthetic leather containing other materials such as PP (polypropylene), fibers such as non-woven fabric and woven fabric, and natural leather. By using these materials, the appearance of the vehicle interior material 10 can be given a high-class feeling.
  • FIG. 3 is a diagram showing an outline of the relationship between the average RSm (mm) of the horizontal surface roughness of the base material 11 of the vehicle interior material 10 and the thickness d2 (mm) of the skin layer 12.
  • the vertical axis represents the average RSm of the horizontal surface roughness of the base material 11
  • the horizontal axis represents the thickness d2 of the skin layer 12 and the Young's modulus E2_80 at the temperature 80 of the material constituting the skin layer 12. It represents the multiplied value d2 ⁇ E2_80.
  • the average surface roughness of the base material 11 in the horizontal direction is also simply referred to as "roughness average”.
  • the vehicle interior material 10 of the present embodiment has a relationship between the average roughness RSm and the thickness d2 of the skin layer 12 so as to be included in the region sandwiched between the solid lines A and B in FIG. Is adjusted.
  • the solid line A in FIG. 3 shows the relationship between the average roughness RSm set in consideration of the allowable weight and the thickness d2 of the skin layer 12.
  • the thickness d2 of the skin layer 12 is excessively thick with respect to the base material 11, the smoothness of the appearance can be ensured, but the thickness is increased as a whole, and the weight of the member formed of the vehicle interior material 10 is increased. It ends up.
  • the solid line A which is the limit value on the lower limit side, is determined in consideration of the thickness and weight in the case of the conventional PP, and the vehicle interior material 10 is at least lighter than in the case of PP. It is designed to be an interior material.
  • the solid line B in FIG. 3 shows the relationship between the roughness average RSm set in consideration of the target of the appearance roughness of the vehicle interior material 10 in the first embodiment and the thickness d2 of the skin layer 12. Both the roughness of the surface of the base material 11 and the thickness of the skin layer 12 affect the size of the unevenness appearing in the appearance of the vehicle interior material 10. In order to ensure the smoothness of the surface of the vehicle interior material 10, it is necessary to increase the thickness d2 of the skin layer 12 as the average roughness RSm is larger. On the side where the average roughness RSm is larger than the solid line B in FIG. 3, the roughness of the base material 11 cannot be sufficiently hidden by the skin layer 12, and the vehicle interior material 10 has conspicuous unevenness in appearance and gives a high-class feeling. It will be missing. Therefore, the vehicle interior material 10 in the present embodiment is set so that the ratio of the roughness average RSm is smaller than that of the solid line B.
  • FIG. 4 shows the relationship between the average height Rz of the unevenness of the surface of the interior material 10 for a vehicle and the thickness d2 ⁇ 80 ° C. Young's modulus E2_80 of the skin layer of the average roughness RSm of the base material 11. It is a figure.
  • the target is that the height average Rz (mm) of the unevenness on the surface of the vehicle interior material 10 is smaller than 0.04 (mm).
  • the vehicle interior material 10 of the present embodiment is configured such that the average roughness RSm (mm) and the thickness d2 (mm) of the skin layer 12 satisfy the relationship of the following formula (3). It has become. As a result, the smoothness of the surface can be sufficiently ensured while keeping the weight within the allowable range.
  • the Young's modulus E2_80 at 80 ° C. of the epidermis material of the epidermis layer 12 is used in accordance with the maximum temperature of 80 ° C. in the thermal cycle test, and the thickness d2 is specified with the epidermis being the softest. This is because it is possible to maintain sufficient surface smoothness even in the harshest high temperature environment. Further, when the skin layer 12 is a hollow structure or the like, Young's modulus may be anisotropic. In that case, Young's modulus in any of the different directions is used.
  • FIG. 5 is a diagram showing a method of calculating the average roughness RSm of the base material 11. As shown in FIG. 5, the average roughness RSm is calculated by the following equation (4).
  • the roughness average RSm is a value indicating the average of the length Xsi of the contour curve element at the reference length.
  • the peaks and valleys that make up the contour elements here have a minimum height and minimum length, and the height or depth is 10% or less of the maximum height, or the length is 1 of the length of the calculation section. Those below% are considered noise and are part of the mountain that follows.
  • a conventional vehicle seat back panel for example, one formed by injection molding PP (polypropylene) is known.
  • PP polypropylene
  • the parts formed by PP have a hard tactile sensation and have a rough surface. Therefore, when PP is frequently used as an interior material for a vehicle and the number of exposed parts of the PP increases in the vehicle, the luxury feeling of the vehicle interior space is lowered.
  • PP is simply used to reduce weight. The plate thickness cannot be reduced. Normally, in order to achieve both weight reduction and strength assurance of parts made of PP, measures such as erecting a plurality of ribs inside the parts are taken, but there is a limit to weight reduction.
  • the base material 11 is made of a light material capable of ensuring strength, and the surface of the base material 11 is made of a base material while keeping the overall weight within an allowable range. It is covered with a skin layer 12 having a sufficient thickness according to the roughness average RSm of 11. As a result, the vehicle interior material 10 is lightweight, has a good appearance, and can secure sufficient strength.
  • FIG. 6 shows a specific sample example of the vehicle interior material 10 of the present embodiment.
  • a specific embodiment of the present embodiment will be shown with reference to FIG.
  • the value of the interior material composed of the PP single layer is shown as a comparative example.
  • the Young's modulus E2_80 of the epidermis layer 12 is 1520 (MPa).
  • ⁇ 1 RSm / (E2_80 ⁇ d2) of Sample1 is 0.163, and Sample1 is an interior material 10 for a vehicle satisfying the formula (3).
  • the Young's modulus E2_80 of the epidermis layer 12 is 6.3 (MPa).
  • ⁇ 1 RSm / (E2_80 ⁇ d2) of Sample2 is 124.2, and Sample2 is an interior material 10 for a vehicle satisfying the relationship of the formula (3).
  • the Young's modulus E2_80 of the epidermis layer 12 is 107.5 (MPa).
  • ⁇ 1 RSm / (E2_80 ⁇ d2) of Sample 3 is 13.73, and Sample 3 is an interior material 10 for a vehicle satisfying the relationship of the formula (3).
  • the Young's modulus E2_80 of the epidermis layer 12 is 6.3 (MPa).
  • ⁇ 1 RSm / (E2_80 ⁇ d2) of Sample 5 is 121.2
  • Sample 5 is an interior material 10 for a vehicle satisfying the relationship of the equation (3).
  • the Young's modulus E2_80 of the epidermis layer 12 is 7.6 (MPa).
  • ⁇ 1 RSm / (E2_80 ⁇ d2) of Sample 4 is 160, and Sample 4 does not satisfy the relationship of the formula (3) and does not correspond to the vehicle interior material 10 of the present embodiment.
  • the vehicle interior material 10 of the second embodiment is a laminated structure in which a base material 11 having a thickness d1 and a skin layer 12 having a thickness d2 are laminated, similarly to the vehicle interior material 10 of the first embodiment. be.
  • the relationship between the thickness d2 of the skin layer 12 and the average roughness RSm of the base material 11 is defined, whereas the vehicle interior material 10 of the second embodiment has an overall thickness.
  • the relationship between (d1 and d2) and the roughness average RSm of the base material 11 is defined.
  • the relationship between the average roughness RSm of the base material 11 and the thickness (d1 and d2) of each layer is defined by the following equation (5). It is a thing.
  • each of E1_80 and E2_80 is the Young's modulus of the base material 11 and the skin layer 12 at 80 ° C.
  • Young's modulus may be anisotropic. In that case, Young's modulus in any of the different directions is used.
  • the vehicle interior material 10 of the second embodiment is the same as that of the first embodiment except that the base material 11 and the skin layer 12 satisfy the relationship of the above formula (5).
  • the description of the constituent materials of each layer and the intended use described in 1 is applied to the vehicle interior material 10 of the second embodiment as it is. Even when the relationship between the base material 11 and the skin layer 12 is defined as in the formula (5), it is possible to obtain the vehicle interior material 10 having a good appearance and light weight, as in the case of the first embodiment. can.
  • FIG. 7 is a diagram schematically showing the configuration of the vehicle interior material 30 according to the third embodiment.
  • the vehicle interior material 30 has an intermediate layer 13 between the base material 11 and the skin layer 12.
  • the intermediate layer 13 is arranged for adhesion between the base material 11 and the skin layer 12 and for reinforcing the vehicle interior material 10.
  • the thickness of the epidermis layer 12 is d2, the thickness of the intermediate layer 13 of the n layer (n is a natural number of 1 or more) is dmn (mm), the Young's modulus of the epidermis layer 12 at 80 ° C. is E2_80, and the intermediate layer of the n layer. Assuming that the Young's modulus of 13 at 80 ° C. is EMn_80 (Gpa), the vehicle interior material 30 of the third embodiment has the roughness average RSm of the base material 11 and the thickness d2 of the intermediate layer 13 and the skin layer 12.
  • the thickness d2 is configured to satisfy the relationship of the following equation (6).
  • the intermediate layer 13 is a hollow structure or the like and its Young's modulus is anisotropic, the Young's modulus in any of the different directions is different. Used as dMi_80.
  • the thickness d3 of the intermediate layer 13 and the thickness d2 of the skin layer 12 are taken into consideration as in the above formula (6). As in the first and second embodiments, it is possible to obtain a vehicle interior material 30 having a good appearance, light weight and high strength.
  • the vehicle interior material 30 does not include the thickness d3 of the intermediate layer 13, and is configured such that the average roughness RSm of the base material 11 and the thickness d2 of the skin layer 12 satisfy the relationship of the formula (3). It may be done. By satisfying the relationship of the formula (3), the vehicle interior material 30 can be made to have a good appearance, a light weight, and a high strength, as in the case of the first embodiment.
  • the interior material 30 for a vehicle has each thickness and coarseness based on all the thicknesses of the thickness dMn of the intermediate layer 13 of the n layer, the thickness d2 of the skin layer 12, and the thickness d1 of the base material 11.
  • the average RSm may be adjusted so as to satisfy the relationship of the following equation (7).
  • ⁇ 2 are the values shown in the following equations (8) and (9) corresponding to the above equations (3) and (5).
  • the vehicle interior material 10 may be such that the relationship between the base material 11 and the skin layer 12 is adjusted so as to satisfy the relationship of at least 0.15 ⁇ 1 and ⁇ 2 ⁇ 135.
  • the vehicle interior material 10 has the base material 11 and the skin layer 12 adjusted so as to satisfy the relationship of 0.15 ⁇ 2 and ⁇ 1 ⁇ 135. Since ⁇ 1> ⁇ 2, the relationship of 0.15 ⁇ 2 ⁇ 1 ⁇ 135 is established by setting 0.15 ⁇ 2 and ⁇ 1 ⁇ 135. Therefore, it is possible to obtain a vehicle interior material 10 having a better appearance, which satisfies both the relationship of the formula (3) of the first embodiment and the formula (5) of the second embodiment.
  • the thickness of the base material 11 is d1 and the thickness of the skin layer 12 is set. It is d2, the thickness of the intermediate layer 13 is dMn, ⁇ 1 is defined as in the above formula (8) corresponding to the above formula (3), and the formulas (6) and (7) described in the third embodiment are defined. ), ⁇ 3 and ⁇ 4 are set to the values shown in the following equations (10) and (11), respectively.
  • the vehicle interior material 30 may be one in which the layers 11 to 13 are adjusted so as to satisfy the relationship of at least 0.15 ⁇ 1 and ⁇ 4 ⁇ 135.
  • vehicle interior material 30 may be adjusted so as to satisfy the relationship of 0.15 ⁇ 1 and ⁇ 3 ⁇ 135, or satisfy the relationship of 0.15 ⁇ 3 and ⁇ 4 ⁇ 135, for example. It may be adjusted so as to be.
  • each layer 11 to 13 is adjusted so as to satisfy the relationship of 0.15 ⁇ 4 and ⁇ 1 ⁇ 135. Since ⁇ 1> ⁇ 3> ⁇ 4, by setting 0.15 ⁇ 4 and ⁇ 1 ⁇ 135, the relationship of 0.15 ⁇ 4 ⁇ 3 ⁇ 1 ⁇ 135 is established, and the equation (6) of the embodiment (3) is established. ) And (7), it is possible to obtain a vehicle interior material 30 having a better appearance.

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Abstract

本出願における１つの車両用内装材の例は、少なくとも基材と表皮層とを含む積層構造体である。基材の水平方向の表面粗さの平均をＲＳｍ（ｍｍ）、基材の８０℃におけるヤング率をＥ１＿８０、基材の厚さをｄ１（ｍｍ）とし、表皮層の８０℃におけるヤング率をＥ２＿８０（Ｇｐａ）、厚さをｄ２（ｍｍ）とするとき、下記式（１）及び式（２）の関係を満たすように構成されている。 【数１】 【数２】

Description

車両用内装材及びシートバックパネル
　本出願は車両用内装材及びこれを用いたシートバックパネルに関する。
　例えば、特許文献１には、車両のシートバックとして利用可能なプレス成形体が記載されている。特許文献１のプレス成形体は、不織布に、接着層を介して表皮を固着させたものであり、特許文献１には、表皮として、天然皮革、合成皮革、又は、ファブリックなどを用いることが記載されている。
日本特開２０２０－１２１５５１号公報
　シートバックパネル等の車両用内装材として用いられる材料には、内装材としての強度と外観の高級感との両立が望まれる。しかし、特許文献１に記載のプレス成形体は、縫製のし易さと強度の確保とを目的とするものであるが、外観の高級感の向上に着目するものではなく、この点で改善の余地が残る。
　本出願は、上記課題を解決することを目的として、良好な外観と十分な強度とを両立できるように改良された車両用内装材とこれを用いて形成されたシートバックパネルを提供するものである。
　本出願における１つの車両用内装材の例は、少なくとも基材と表皮層とを含む積層構造体である。基材の水平方向の表面粗さの平均をＲＳｍ（ｍｍ）、基材の８０℃におけるヤング率をＥ１＿８０、基材の厚さをｄ１（ｍｍ）とし、表皮層の８０℃におけるヤング率をＥ２＿８０（Ｇｐａ）、厚さをｄ２（ｍｍ）とするとき、下記式（１）及び式（２）の関係を満たすように構成されている。
Figure JPOXMLDOC01-appb-M000007
Figure JPOXMLDOC01-appb-M000008
　本出願の他の形態としてのシートバックパネルは、本出願の何れかの形態の車両用内装材を用いて形成されたものである。
　本出願の１つの車両用内装材の例によれば、基材によって十分な強度を確保できる範囲で、基材の表面粗さに応じて表皮層の厚さが調整されている。従って、車両用内装材を、十分な強度を確保しつつ外観を良好なものとすることができる。また、この車両用内装材を用いて形成されたシートバックパネルを車両のシートに用いることで、車両内の空間を高級感あるものとすることができる。
車両内に配置されるシートを模式的に示す図である。 本出願の実施の形態１に係る車両用内装材の断面構成を模式的に示す図である。 本出願の実施の形態１に係る車両用内装材の基材の水平方向の表面粗さの平均（ｍｍ）と、表皮層の厚さ（ｍｍ）との関係の概略を示す図である。 本出願の実施の形態１に係る車両用内装材の凹凸の高さと、基材の水平方向の表面粗さの平均の表皮層の厚さに対する比率との関係を示す図である。 基材の水平方向の表面粗さの平均ＲＳｍの算出方法について示す図である。 本出願の実施の形態１の車両用内装材の具体的なサンプル例を示す。 本出願の実施の形態３に係る車両用内装材の断面構成を模式的に示す図である。
　以下、図面を参照して本出願に係る車両用内装材の実施の形態について説明する。なお、各図において、同一または相当する部分には同一符号を付してその説明を簡略化ないし省略する。
実施の形態１．
　図１は、車両内に配置されるシートの一例を示す図である。本実施の形態に係る車両用内装材１０は、例えば図１に示されるように、車両用のシート１のシートバックパネル２の材料として用いられる。シートバックパネル２は、特に後部座席に座る人の目前の目立つ場所にあり、車室内で広い面積を占める。従って、本実施の形態に係る車両用内装材１０をシートバックパネル２に適用することで、車室空間の外観を効果的に高級感あるものとすることができる。
　ただし、車両用内装材１０は、車両内に設置される他の部品、特に、人の手が触れる部分又は人の目に付きやすい部分に、好適に用いることができる。具体的に、車両用内装材１０は、シートバックパネルの他に、例えば、ダッシュボード、インストルメントパネル、ドアトリム、ピラーのトリム、及び、リアのパーセルシェルフ等の全体又は一部を構成する材料として用いることができる。
　図２は、本実施の形態に係る車両用内装材の断面構成を模式的に示す図である。図２に示されるように、車両用内装材１０は、基材１１と表皮層１２とを貼り合わせた積層構造体である。
　基材１１としては、必要な剛性を確保できるように配合が調整された比較的軽い材料が用いられ、基材１１によって、車両用の内装部品の十分な強度が確保される。また、基材１１は、少なくとも表皮層１２に比べて軽い（密度が小さい）材料を用いて形成される。具体的に、基材１１の材料として、例えば、繊維、圧縮フェルト及び編フェルト等のフェルト、又は、発泡ウレタン等の発泡樹脂及び樹脂の中空構造体（例えばハニカム構造）等が用いられる。また、基材１１は、フェルトと樹脂等が積層された構成であってもよい。
　表皮層１２は、例えば、ＰＶＣ（ポリ塩化ビニル）を含む合成皮革からなる。ここで、ＰＶＣを含む合成皮革には、ＰＶＣのみからなる合成皮革、及び、ＰＶＣを主成分とする合成皮革が含まれる。ＰＶＣを主成分とする合成皮革には、例えば、ＰＶＣの表面にナイロンやポリウレタン等の樹脂を塗布したものなどがある。また、表皮層１２は、例えば、ＰＰ（ポリプロピレン）等、他の材料を含む合成皮革、不織布及び織物等の繊維、及び、天然皮革等からなるものであってもよい。これらの材料を用いることにより、車両用内装材１０の外観に高級感を持たせることができる。
　図３は、車両用内装材１０の基材１１の水平方向の表面粗さの平均ＲＳｍ（ｍｍ）と、表皮層１２の厚さｄ２（ｍｍ）との関係の概略を示す図である。図３において、縦軸は、基材１１の水平方向の表面粗さの平均ＲＳｍ、横軸は、表皮層１２の厚さｄ２に、表皮層１２を構成する材料の温度８０におけるヤング率Ｅ２＿８０を掛けた値ｄ２×Ｅ２＿８０を表している。なお、以下の実施の形態では、基材１１の水平方向の表面粗さの平均を、単に「粗さ平均」とも称することとする。本実施の形態の車両用内装材１０は、図３の実線Ａ及び実線Ｂに挟まれた領域に含まれるものとなるように、粗さ平均ＲＳｍと、表皮層１２の厚さｄ２との関係が調整されたものである。
　図３の実線Ａは、許容される重量を考慮して設定される粗さ平均ＲＳｍと表皮層１２の厚さｄ２との関係を示す。基材１１に対し表皮層１２の厚さｄ２が過度に厚くなる場合、外観の滑らかさは確保できるものの、全体として厚さが増し、車両用内装材１０で形成される部材の重量が増してしまう。実施の形態１では、下限側の限界値となる実線Ａを従来のＰＰの場合の厚さと重量とを考慮して決定しており、車両用内装材１０が、少なくともＰＰの場合よりも軽量な内装材となるようにしている。
　図３の実線Ｂは、実施の形態１における車両用内装材１０の外観の粗さの目標を考慮して設定される粗さ平均ＲＳｍと表皮層１２の厚さｄ２との関係を示す。基材１１の表面の粗さと表皮層１２の厚さとは、何れも車両用内装材１０の外観に現れる凹凸の大きさに影響する。車両用内装材１０の表面の滑らかさを確保するためには、粗さ平均ＲＳｍが大きい場合ほど、表皮層１２の厚さｄ２を大きくする必要がある。図３の実線Ｂよりも粗さ平均ＲＳｍが大きい側では、基材１１の粗さを表皮層１２で十分に隠すことができず、車両用内装材１０は、外観の凹凸が目立ち高級感に欠けたものとなる。従って、本実施の形態における車両用内装材１０は、実線Ｂより粗さ平均ＲＳｍの比率が小さくなるように設定する。
　図４は、車両用内装材１０の表面の凹凸の高さ平均Ｒｚと、基材１１の粗さ平均ＲＳｍの表皮層の厚さｄ２×８０℃ヤング率Ｅ２＿８０との比率と、の関係を示す図である。図４に示されるように、実施の形態１では、車両用内装材１０の表面の凹凸の高さ平均Ｒｚ（ｍｍ）が０．０４（ｍｍ）より小さくなることを目標とする。そして、この目標に対応して、粗さ平均の表皮層１２の厚さに対する比率（α２＝ＲＳｍ／（ｄ２×Ｅ２＿８０））の上限値を１３５に設定している。
　具体的に、本実施の形態の車両用内装材１０は、粗さ平均ＲＳｍ（ｍｍ）と表皮層１２の厚さｄ２（ｍｍ）とが以下の式（３）の関係を満たすように構成されたものとなっている。これにより、重量を許容範囲に収めつつ、表面の滑らかさを十分に確保できる。
Figure JPOXMLDOC01-appb-M000009
　なお、表皮層１２の表皮材の８０℃のヤング率Ｅ２＿８０を用いているのは、熱サイクル試験の最高温度８０℃に合わせたものであり、表皮が最も柔らかい状態で厚さｄ２を規定することで、最も厳しい高温環境下においても十分な表面の滑らかさを保つことができるものとするためである。また、表皮層１２が中空構造体等である場合、ヤング率に異方性がある場合がある。その場合には、その異なったいずれかの方向におけるヤング率が用いられる。
　また、各式で用いられる粗さ平均ＲＳｍは、「ＪＩＳ　Ｂ　０６０１（ＩＳＯ　４２８７）」で規定されている定義に基づき算出される値である。図５は、基材１１の粗さ平均ＲＳｍの算出方法について示す図である。図５に示されるように、粗さ平均ＲＳｍは、次式（４）によって算出される。
Figure JPOXMLDOC01-appb-M000010
　粗さ平均ＲＳｍは、基準長さにおける輪郭曲線要素の長さＸｓｉの平均を示す値である。ここでの輪郭要素を構成する山及び谷には、最低高さと最低長さの規定があり、高さ又は深さが最大高さの１０％以下、又は長さが計算区画の長さの１％以下であるものはノイズとみなされて、前後に続く山の一部とされる。
　ところで、従来の車両のシートバックパネルとして、例えば、ＰＰ（ポリプロピレン）をインジェクション成形することにより形成されたものが知られている。しかし、ＰＰにより形成された部品は触感が硬く、表面にざらつきがある。従って、車両用内装材としてＰＰが多用され、車両内にＰＰの露出箇所が多くなると、車室空間の高級感が低下することとなる。また、シートバック等の比較的大きな部品をＰＰにより形成する場合、ある程度の板厚が必要となるため重くなるが、部品の強度確保及び形状保持の必要性から、軽量化のために単にＰＰの板厚を薄くすることはできない。通常、ＰＰからなる部品の軽量化と強度確保とを両立させるためには、部品の内側に複数のリブを立てる等の対策が取られるが、軽量化には限界がある。
　これに対し、本実施の形態の車両用内装材１０では、基材１１を強度が確保できる軽い材料で構成するとともに、全体の重量を許容範囲に抑えつつ、基材１１の表面を、基材１１の粗さ平均ＲＳｍに応じた十分な厚さの表皮層１２で覆っている。これにより、車両用内装材１０は、軽量で外観が良好であり、かつ十分な強度を確保できるものとなっている。
　図６は、本実施の形態の車両用内装材１０の具体的なサンプル例を示す。以下、図６を用いて、本実施の形態の具体的な実施例を示す。なお、図６の表の一番上の行には、比較例として、ＰＰ単層で構成された内装材の値が示されている。
実施例１．
　Ｓａｍｐｌｅ１は、基材１１として粗さ平均ＲＳｍ＝０．６２（ｍｍ）のフェルトを用い、表皮層１２として厚さｄ２＝２．５（ｍｍ）のＰＰを用いた車両用内装材１０である。表皮層１２のヤング率Ｅ２＿８０は１５２０（ＭＰａ）である。Ｓａｍｐｌｅ１のα１＝ＲＳｍ／（Ｅ２＿８０×ｄ２）は０．１６３であり、Ｓａｍｐｌｅ１は式（３）を満たす車両用内装材１０である。
実施例２．
　Ｓａｍｐｌｅ２は、基材１１として粗さ平均ＲＳｍ＝０．９０５（ｍｍ）のフェルトを用い、表皮層１２として厚さｄ２＝１．２２（ｍｍ）のＰＶＣを用いた車両用内装材１０である。表皮層１２のヤング率Ｅ２＿８０は６．３（ＭＰａ）である。Ｓａｍｐｌｅ２のα１＝ＲＳｍ／（Ｅ２＿８０×ｄ２）は１２４．２であり、Ｓａｍｐｌｅ２は式（３）の関係を満たす車両用内装材１０である。
実施例３．
　Ｓａｍｐｌｅ３は、基材１１として粗さ平均ＲＳｍ＝０．６２（ｍｍ）のフェルトを用い、表皮層１２として厚さｄ２＝０．４２（ｍｍ）の繊維を用いた車両用内装材１０である。表皮層１２のヤング率Ｅ２＿８０は１０７．５（ＭＰａ）である。Ｓａｍｐｌｅ３のα１＝ＲＳｍ／（Ｅ２＿８０×ｄ２）は１３．７３であり、Ｓａｍｐｌｅ３は式（３）の関係を満たす車両用内装材１０である。
実施例４．
　Ｓａｍｐｌｅ５は、基材１１として粗さ平均ＲＳｍ＝１．１５（ｍｍ）の発泡ウレタンを用い、表皮層１２として厚さｄ２＝１．２２（ｍｍ）のＰＶＣを用いた車両用内装材１０である。表皮層１２のヤング率Ｅ２＿８０は６．３（ＭＰａ）である。Ｓａｍｐｌｅ５のα１＝ＲＳｍ／（Ｅ２＿８０×ｄ２）は１２１．２であり、Ｓａｍｐｌｅ５は式（３）の関係を満たす車両用内装材１０である。
　なお、Ｓａｍｐｌｅ４は、基材１１として粗さ平均ＲＳｍ＝１．２２（ｍｍ）のフェルトを用い、表皮層１２として厚さｄ２＝１．１１（ｍｍ）のＰＶＣを用いた車両用内装材１０である。表皮層１２のヤング率Ｅ２＿８０は７．６（ＭＰａ）である。Ｓａｍｐｌｅ４のα１＝ＲＳｍ／（Ｅ２＿８０×ｄ２）は１６０であり、Ｓａｍｐｌｅ４は、式（３）の関係を満たしておらず、本実施の形態の車両用内装材１０には該当しない。
実施の形態２．
　実施の形態２の車両用内装材１０は、実施の形態１の車両用内装材１０と同様に、厚さｄ１の基材１１と、厚さｄ２の表皮層１２が積層された積層構造体である。実施の形態１では、表皮層１２の厚さｄ２と基材１１の粗さ平均ＲＳｍとの関係が規定されているのに対し、実施の形態２の車両用内装材１０は、全体の厚さ（ｄ１及びｄ２）と、基材１１の粗さ平均ＲＳｍとの関係が規定されている。
　具体的に、実施の形態２の車両用内装材１０は、基材１１の粗さ平均ＲＳｍと、各層の厚さ（ｄ１及びｄ２）との関係が次式（５）のように規定されたものである。
Figure JPOXMLDOC01-appb-M000011
　車両用内装材１０の基材１１及び表皮層１２は、必須の構成要素であり、従って、厚さｄ１及びｄ２は、少なくとも０より大きな値である。また、Ｅ１＿８０及びＥ２＿８０のそれぞれは、基材１１及び表皮層１２の８０℃におけるヤング率である。実施の形態１に置いても説明したが、基材１１又は表皮層１２が中空構造体等である場合、ヤング率に異方性がある場合がある。その場合には、その異なったいずれかの方向におけるヤング率が用いられる。
　なお、実施の形態２の車両用内装材１０は、基材１１と表皮層１２とが上記式（５）の関係を満たす点を除き、実施の形態１と同一であり、従って、実施の形態１に説明した各層の構成材料及び使用用途等の説明は、実施の形態２の車両用内装材１０にもそのまま適用される。基材１１と表皮層１２との関係が式（５）のように規定される場合にも、実施の形態１の場合と同様に、外観が良好かつ軽量な車両用内装材１０を得ることができる。
実施の形態３．
　図７は、実施の形態３の車両用内装材３０の構成を模式的に示す図である。図７に示されるように、車両用内装材３０は、基材１１と表皮層１２との間に中間層１３を有している。中間層１３は、基材１１と表皮層１２との接着や、車両用内装材１０の補強のために配置される。中間層１３としては、不織布、繊維、ＰＰ等が用いられる。
　表皮層１２の厚さをｄ２とし、ｎ層（ｎは１以上の自然数）の中間層１３厚さをそれぞれｄＭｎ（ｍｍ）、表皮層１２の８０℃におけるヤング率をＥ２＿８０、ｎ層の中間層１３の８０℃におけるヤング率をＥＭｎ＿８０（Ｇｐａ）とすると、実施の形態３の車両用内装材３０は、基材１１の粗さ平均ＲＳｍと、中間層１３の厚さｄ２及び表皮層１２との厚さｄ２とが、以下の式（６）の関係を満たすように構成されている。
Figure JPOXMLDOC01-appb-M000012
　なお、基材１１及び表皮層１２の場合と同様であるが、中間層１３が中空構造体等でそのヤング率に異方性がある場合には、その異なったいずれかの方向におけるヤング率がｄＭｉ＿８０として用いられる。
　車両用内装材３０を、中間層１３を有する構成とする場合、上記式（６）のように中間層１３の厚さｄ３と表皮層１２との厚さｄ２とを考慮した構成とすることで、実施の形態１及び２と同様に、良好な外観と軽量で高い強度の車両用内装材３０を得ることができる。
　なお、車両用内装材３０は、中間層１３の厚さｄ３を含めず、基材１１の粗さ平均ＲＳｍと表皮層１２の厚さｄ２とが、式（３）の関係を満たすように構成されたものとしてもよい。式（３）の関係を満たす構成とすることで、車両用内装材３０を、実施の形態１の場合と同様に、外観が良好かつ軽量で高い強度のものとすることができる。
　あるいは、車両用内装材３０は、ｎ層の中間層１３の厚さｄＭｎ、表皮層１２の厚さｄ２、及び、基材１１の厚さｄ１の全ての厚さを踏まえ、各厚さと、粗さ平均ＲＳｍとを、以下の式（７）の関係を満たすように調整したものとしてもよい。
Figure JPOXMLDOC01-appb-M000013
その他の実施の形態
　ここで車両用内装材１０が基材１１と表皮層１２の２層で構成される場合において、基材１１の厚さをｄ１、表皮層１２の厚さをｄ２とし、α１、α２を、上記式（３）及び（５）に対応して以下の式（８）及び（９）に示される値とする。
Figure JPOXMLDOC01-appb-M000014
Figure JPOXMLDOC01-appb-M000015
　実施の形態１では、α１が式（３）の関係（０．１５＜α＜１３５）を満たす場合について説明し、実施の形態２では、α２が式（５）の関係（０．１５＜β＜１３５）を満たす場合について説明した。しかし、車両用内装材１０は、少なくとも、０．１５＜α１かつα２＜１３５の関係を満たすように基材１１及び表皮層１２の関係が調整されたものであればよい。
　また、車両用内装材１０は、より好ましくは、０．１５＜α２かつα１＜１３５の関係を満たすように基材１１及び表皮層１２が調整されたものとするとよい。α１＞α２であることから、０．１５＜α２かつα１＜１３５とすることで、０．１５＜α２＜α１＜１３５の関係が成立する。従って、実施の形態１の式（３）及び実施の形態２の式（５）の関係の両者を満たす、より外観の良好な車両用内装材１０を得ることができる。
　また、車両用内装材３０が基材１１と表皮層１２とｎ層の中間層１３との３層以上で構成される場合において、基材１１の厚さをｄ１、表皮層１２の厚さをｄ２とし、中間層１３の厚さをｄMｎとし、上記式（３）に対応して上記式（８）のように、α１を定義し、実施の形態３で説明した式（６）、（７）に対応して、α３、α４をそれぞれ以下の式（１０）、式（１１）に示される値とする。
Figure JPOXMLDOC01-appb-M000016
Figure JPOXMLDOC01-appb-M000017
　実施の形態３の式（６）では、０．１５＜α３＜１３５の関係を満たすように基材の粗さＲＳｍと表皮層１２及び中間層１３の厚さが調整されている場合について説明した。しかしながら、車両用内装材３０は、少なくとも０．１５＜α１かつα４＜１３５の関係を満たすように、各層１１～１３が調整されたものであればよい。
　また、車両用内装材３０は、例えば、０．１５＜α１かつα３＜１３５の関係を満たすように調整されたものであってもよいし、０．１５＜α３かつα４＜１３５の関係を満たすように調整されたものであってもよい。
　より好ましくは、０．１５＜α４かつα１＜１３５の関係を満たすように、各層１１～１３が調整されたものとするよい。α１＞α３＞α４であるから、０．１５＜α４かつα１＜１３５とすることで、０．１５＜α４＜α３＜α１＜１３５の関係が成立し、実施の形態（３）の式（６）及び（７）の両者を満たす、より外観の良好な車両用内装材３０を得ることができる。
　なお、以上の実施の形態において各要素の個数、数量、量、範囲等の数に言及した場合、特に明示した場合や原理的に明らかにその数に特定される場合を除いて、その言及した数に、この発明が限定されるものではない。また、この実施の形態において説明する構造等は、特に明示した場合や明らかに原理的にそれに特定される場合を除いて、この発明に必ずしも必須のものではない。
　　１　シート
　　２　シートバックパネル
　　１０、３０　車両用内装材
　　１１　基材
　　１２　表皮層
　　１３　中間層

Claims (10)

  1. 　少なくとも基材と表皮層とを含む積層構造体であって、
    　前記基材の水平方向の表面粗さの平均をＲＳｍ（ｍｍ）、前記基材の８０℃におけるヤング率をＥ１＿８０（Ｇｐａ）、前記基材の厚さをｄ１（ｍｍ）とし、
    　前記表皮層の８０℃におけるヤング率をＥ２＿８０（Ｇｐａ）、前記表皮層の厚さをｄ２（ｍｍ）とするとき、
    　下記式（１）及び式（２）の関係を満たすように構成されていることを特徴とする車両用内装材。
    Figure JPOXMLDOC01-appb-M000001
    Figure JPOXMLDOC01-appb-M000002
  2. 　前記車両用内装材は、更に、下記式（３）の関係を満たすように構成されていることを特徴とする請求項１に記載の車両用内装材。
    Figure JPOXMLDOC01-appb-M000003
     　
  3. 　少なくとも基材と表皮層とを含む積層構造体であって、
    　前記基材の水平方向の表面粗さの平均をＲＳｍ（ｍｍ）とし、
    　前記表皮層の８０℃におけるヤング率をＥ２＿８０（Ｇｐａ）、前記表皮層の厚さをｄ２（ｍｍ）とするとき、
    　下記式（４）の関係を満たすように構成されていることを特徴とする車両用内装材。
    Figure JPOXMLDOC01-appb-M000004
  4. 　前記基材は、繊維、フェルト、発泡樹脂、又は、樹脂の中空構造体からなることを特徴とする請求項１から３のいずれか１項に記載の車両用内装材。
  5. 　前記表皮層は、合成皮革、不織布、織物、又は、天然皮革からなることを特徴とする請求項１から４のいずれか１項に記載の車両用内装材。
  6. 　前記表皮層と前記基材との間に単層又は複層の中間層を、更に備えることを特徴とする請求項１から５のいずれか１項に記載の車両用内装材。
  7. 　前記中間層は、単層又は複数層で構成され、前記中間層は、不織布、樹脂シート、繊維、及び、ポリプロピレンのいずれかからなる層を含む請求項６に記載の車両用内装材。
  8. 　前記中間層がｎ層である場合に、
    　前記中間層の８０℃におけるヤング率をＥMｎ＿８０（Ｇｐａ）、厚さをｄMｎ（ｍｍ）とすると、下記式（５）の関係を満たすように構成されていることを特徴とする請求項６又は７に記載の車両用内装材。
    Figure JPOXMLDOC01-appb-M000005
     　
  9. 　前記中間層がｎ層である場合に、
    　前記中間層の８０℃におけるヤング率をＥMｎ＿８０（Ｇｐａ）、厚さをｄMｎ（ｍｍ）とすると、下記式（６）の関係を満たすように構成されていることを特徴とする請求項６又は７に記載の車両用内装材。
    Figure JPOXMLDOC01-appb-M000006
     　
  10. 　請求項１～９のいずか１項に記載の車両用内装材を用いて形成されたシートバックパネル。
PCT/JP2021/045747 2020-12-22 2021-12-13 車両用内装材及びシートバックパネル WO2022138264A1 (ja)

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* Cited by examiner, † Cited by third party
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JP2006051813A (ja) * 2004-07-14 2006-02-23 Toray Ind Inc 強化繊維基材、繊維強化プラスチック部材および繊維強化プラスチック部材の製造方法
WO2019065912A1 (ja) * 2017-09-28 2019-04-04 株式会社クラレ 多層フィルムおよび繊維強化樹脂の加飾成形体

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006051813A (ja) * 2004-07-14 2006-02-23 Toray Ind Inc 強化繊維基材、繊維強化プラスチック部材および繊維強化プラスチック部材の製造方法
WO2019065912A1 (ja) * 2017-09-28 2019-04-04 株式会社クラレ 多層フィルムおよび繊維強化樹脂の加飾成形体

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