Automotive interior skin materials

Abstract

To provide a skin material for automobile interior having excellent designability.SOLUTION: A skin material 1 for automobile interior includes a skin layer 2, and a layer 3 stacked on a rear face side of the skin layer 2, wherein the skin layer 2 contains one or two kinds of resins selected from the group consisting of a polyvinyl chloride-based resin and a polyurethane-based resin, the skin material 1 has a plurality of holes 4 penetrating through the skin material 1, a side face 5 of the hole 4 is visible from the side of the skin layer 2, and the color of the side face 5 of the hole 4 includes a different color.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a skin material for automobile interiors, in which a perforated pattern is formed on synthetic leather, which can be suitably used for, for example, seats. [Background technology]

[0002] Conventionally, various attempts have been made to impart design features, and one example of a decorative sheet with a hole pattern is one that is used for automobile seats, automobile interior materials, clothing fabric, and other covering materials, and has an uneven surface with the convex and concave parts being different colors. This decorative sheet is made of a knitted or woven fabric with a raised surface and has discontinuous holes in a pattern distributed on it. The surface sheet and a base sheet of a different color are laminated and integrated onto the back surface of the surface sheet, and the holes are recessed from the surface by the thickness of the surface sheet, and the bottoms of the holes are formed by the base sheet, creating a three-dimensional pattern. This decorative sheet is known, and it is described that the contrast between the color difference and the base surface of the holes and the difference in material is clearer (Patent Document 1).

[0003] Furthermore, a decorative part is known that is provided with a base material used in vehicle interior materials and a skin material laminated on the surface of the base material, as a new design expression that cannot be expressed by stitching (decorative stitching) in which sewing thread is sewn into a skin material, in which a through hole is formed in the skin material that reaches the base material, and a recess is formed in the base material that has an opening that is continuous with the through hole, and the inner surface of the recess is visible from the outside through the through hole. The surface of the decorative part has a portion that is covered with the skin material and a portion that is not covered by the skin material and exposes the inner surface of the recess provided in the base material, and it is described that the difference in surface properties between these two portions makes it possible to express a new design that cannot be obtained by applying stitching or the like (Patent Document 2).

[0004] Also, as a decorative member for a vehicle, for example, a skin provided on a door trim of a vehicle door to improve the design is partially attached to a base material. This decorative member includes a base material and a cover covering one side of the base material, and the cover is provided with a through hole penetrating in the thickness direction and allowing one side to be viewed, and a decorative part that reflects light differently from the design surface of the cover is provided in a portion corresponding to the through hole. It is described that a change in the shape and area of ​​the decorative part viewed through the through hole allows the occupant to recognize that the pattern on the design surface of the cover has changed (Patent Document 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Publication number 7-45314 [Patent Document 2] JP 2017-206139 A [Patent Document 3] JP 2020-132117 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the decorative sheet of Patent Document 1, the bottoms of the holes drilled in the woven fabric mounting sheet are formed as a three-dimensional pattern by the base sheet. In other words, although the contrast between the woven fabric and the base surface due to the difference in color and material becomes clearer, the decorative sheet is limited to mounting sheets in which the bottoms of the holes are clearly visible.

[0007] In addition, although the decorative parts in Patent Document 2 can express new designs that cannot be obtained by applying stitching or the like due to differences in surface properties, the decorative parts are limited to those in which the exposed inner surface of the recess provided in the base material is sufficiently visible.

[0008] In addition, the decorative member of Patent Document 3 is known to have a decorative portion in the area corresponding to the through hole that reflects light differently from the decorative surface of the cover, and the change in shape and area of ​​the decorative portion visible through the through hole can make the occupant perceive that the pattern on the decorative surface of the cover has changed, but the decorative member is limited to one in which the decorative portion is fully visible.

[0009] However, the decorative sheets, decorative parts, and decorative members of the above-mentioned conventional techniques have a problem in that they need to be large enough to allow the bottom of the hole or the base material below the hole to be seen.

[0010] The present invention has been made in view of the above technical background, and has an object to provide a skin material for automobile interiors that has an excellent design property not available in the prior art due to the structure of the skin material. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention provides the following means.

[0012] [1] The skin material comprises a skin layer and a layer laminated on the back side of the skin layer, The surface layer contains one or two resins selected from the group consisting of polyvinyl chloride resins and polyurethane resins, the layers laminated on the back side of the skin layer are a resin layer and a fiber fabric layer, in that order, and the resin layer laminated on the back side of the skin layer is a layer containing one or two types of resin selected from the group consisting of polyvinyl chloride resins and polyurethane resins; The fiber fabric layer is a tricot knit fabric, a thickness t1 of the skin layer satisfies a relationship of 1 / 10 to 1 / 5 of a sum of a thickness t3 of the resin layer laminated on the back side of the skin layer and a thickness t2 of the fiber fabric layer laminated on the back side of the skin layer, and The thickness t3 of the resin layer is 200 μm to 700 μm, The thickness t2 of the fiber fabric layer is in the range of 200 μm to 1,500 μm, the skin material has a plurality of punched cone-shaped holes penetrating from a skin layer on a front side of the skin material to a fiber fabric layer on a back side of the skin material, The diameter d1 of the hole on the skin layer side is in the range of 0.8 mm to 1.5 mm. , The side surface of the hole is visible from the skin layer side, At least one of the surface layer, the resin layer, and the fiber fabric layer has a side surface of the hole that is a different color from any of the other layers; The different color has a color difference from the surface layer of ΔE*=30 or more.

[0016] [2] The skin material for automobile interiors according to claim 1, wherein the cross-sectional color of the resin layer is different from the cross-sectional color of the skin layer, and the cross-sectional color of the fiber fabric layer is similar to the cross-sectional color of the resin layer.

[0017] [3] The skin material for automobile interiors according to claim 1, wherein a cross-sectional color of the skin layer, a cross-sectional color of the resin layer, and a cross-sectional color of the fiber fabric layer are different from one another. Effect of the Invention

[0018] In the invention of [1], the side of the hole penetrating the layer laminated on the back side of the skin layer can be visually confirmed from the specific type of skin layer, and the side of the hole includes a different color, so that a skin material for automobile interiors having excellent design not found in the prior art can be provided. That is, the contrast and accent (emphasis) due to the different colors of the side of the hole, which cannot be expressed only by the multiple holes drilled and the arrangement or arrangement of the holes, are added, and an excellent design can be obtained. In particular, since it is sewn or molded to fit the shape of the seat, door, headrest, ceiling, instrument panel, etc. to form a three-dimensional shape, the effect is particularly remarkable on curved surfaces, and further, combined with the respective effects of flat and curved surfaces, a skin material for automobile interiors having excellent design as a whole can be provided.

[0019] [1] In the invention, the layers laminated on the back side of the skin layer are, in that order, a resin layer and a fiber fabric layer, and the resin layer is between the skin layer and the fiber fabric layer. A skin material having the specific type of resin layer allows the side surface of the hole to be fully visible and increases the variety of different colors on the side surface of the hole, resulting in an even more excellent design.

[0020] [2]~[3] The invention of claim 1 can provide further variation through the appearance of different colors, making it an exceptionally excellent design. [Brief description of the drawings]

[0021] [Figure 1] 1 is a plan view (front surface) showing one embodiment of an automobile interior covering material according to the present invention. [Diagram 2] FIG. 2 is a bottom view (reverse side) of the automobile interior covering material shown in FIG. [Diagram 3] 2 is a cross-sectional view along the line AA′ of the automobile interior covering material shown in FIG. [Figure 4] FIG. 2 is a cross-sectional view showing another embodiment of an automobile interior covering material according to the present invention. [Diagram 5] 1 is a photograph of the surface of an automobile interior covering material of Example 1. [Figure 6] 2 is a photograph of the rear surface of the automobile interior covering material of Example 1. [Figure 7] 1 is a cross-sectional photograph of the automobile interior skin material of Example 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Next, an embodiment of an automobile interior skin material according to the present invention will be described with reference to the drawings.

[0023] The skin material 1 for automobile interiors according to the present invention comprises a skin layer 2 and a layer laminated on the back side of the skin layer 2, the skin layer 2 containing one or two resins selected from the group consisting of polyvinyl chloride resins and polyurethane resins, the skin material 1 has a plurality of holes 4 penetrating the skin material 1, side surfaces 5 of the holes 4 are visible from the skin layer 2 side, and the side surfaces 5 of the holes 4 include different colors (FIGS. 1 to 4).

[0024] By adopting such a configuration, contrast and accent (emphasis) due to the different colors of the side surfaces 5 of the holes 4, which cannot be expressed by the multiple holes 4 and the arrangement or alignment of the holes 4 alone, are added, resulting in an excellent design, and it is possible to provide an automobile interior skin material 1 with excellent design not available in the prior art. Since the skin material 1 is sewn or molded to fit the shape of the interior material and has a three-dimensional shape, it is possible to provide an automobile interior skin material with excellent design that gives an aesthetic impression in particular by combining the effects of both flat and curved surfaces depending on the viewing direction of the driver and other users.

[0025] The surface layer 2 contains one or two resins selected from the group consisting of polyvinyl chloride resins and polyurethane resins. The surface layer 2 is formed by applying a resin composition containing a plasticizer, a heat stabilizer, a flame retardant, a solvent, a pigment, etc., appropriately according to the above-mentioned resin, onto a release paper using a comma coater, and then heat-treating the resin. The polyurethane resin may be either a solvent-based polyurethane or a water-based polyurethane, and the polyvinyl chloride resin may have a molecular weight within a range that is fluid at room temperature and can be coated into a film. For either resin, the plasticizer, heat stabilizer, and flame retardant may be appropriately selected and used.

[0026] The skin layer 2 is preferably in the form of a sheet or film, and the thickness t1 is not particularly limited, but is preferably in the range of 50 μm to 300 μm, and is preferably in a range where the thickness t1 of the skin layer 2 is 1 / 5 to 2 / 5 of the thickness t2 of the fiber fabric layer 3. This range of relationship is preferable because it allows the side surface 5 of the hole 4 to be sufficiently visually recognized. In addition, within the range where the relationship between the thickness t1 and the thickness t2 is satisfied, the thickness t2 is preferably in the range of 200 μm to 1,500 μm.

[0027] The layer laminated on the back side of the skin layer is preferably a fiber fabric layer 3, and examples of the fiber fabric layer 3 include woven fabric, knitted fabric, nonwoven fabric, etc., but tricot knitted fabric is preferable because holes 4 are formed. The fiber materials constituting the woven fabric, knitted fabric, nonwoven fabric, etc. are not particularly limited and examples thereof include natural fibers and synthetic fibers. Color can be imparted to the fiber fabric layer 3 by a known method such as yarn dyeing with a dye (e.g., skein dyeing, cheese dyeing, etc.) or roll dyeing (e.g., liquid jet dyeing, winch dyeing, etc.).

[0028] To laminate the fiber fabric layer 3 on the skin layer 2, for example, the above-mentioned resin composition is applied onto a release paper using a comma coater, and then the fiber fabric layer 3 is laminated thereon, followed by heat treatment to integrate the laminate. It is preferable to nip the layers with a pair of rollers before the heat treatment.

[0029] The holes 4 pass through the fiber fabric layer 3 from the skin layer 2. The holes 4 are formed by perforating the skin material 1 with a punching mechanism. That is, the holes 4 are formed by punching with a punching die having a sharp cutting edge, for example, a substantially cylindrical needle. The diameter of the needle is not particularly limited, but is preferably in the range of 0.9 mm to 1.6 mm in consideration of the visibility of the side surface 5 of the punched hole 4 (FIGS. 1 to 4). Note that FIG. 5 shows Example 1 FIG. 6 is a photograph of the surface of the automobile interior skin material, and it is visible that the side surface 5 of the hole 4 contains a different color. Example 1 1 is a photograph of the back surface of an automobile interior skin material.

[0030] The diameter d1 of the hole 4 on the skin layer 2 side is preferably set in the range of 0.8 mm to 1.5 mm, and more preferably in the range of 1.0 mm to 1.3 mm. A range in which the diameter d1 of the hole 4 on the skin layer 2 side is 1.00 to 1.3 times the diameter d2 of the hole 4 on the fiber fabric layer 3 side is preferable. This range of relationship is preferable because it allows the side surface 5 of the hole 4 to be sufficiently visually recognized. In addition, within the range in which the relationship between the diameter d1 and the diameter d2 is satisfied, the diameter d2 is preferably in the range of 0.6 mm to 1.3 mm (FIGS. 1 to 4).

[0031] In the skin material 1 for automobile interiors of the present invention, the side surface 5 of the hole 4 can be visually recognized from the side of the skin layer 2. The color of the side surface 5 of the hole 4 includes different colors. In the present invention, the different colors include layers of different colors among the layers constituting the skin material 1, and ΔE* calculated from the color measurement results at a viewing angle of 10 degrees using a D65 light source in the CIE (International Commission on Illumination) L*a*b* color system is 30 or more. On the other hand, if ΔE* is less than 30, it is difficult to recognize the different color at a glance. In this application, Δ is used to mean delta, and ΔE* means delta E* and means color difference. In order to include different colors in the color of the side surface 5 of the hole 4, the resin contained in the skin layer 2 may be blended with a pigment by kneading it into it, and the fibers constituting the fiber fabric layer 3 may be dyed by a known method using dyes according to the type of fiber or using dyes based on the type of fiber. In this case, the cross-sectional colors of the skin layer 2 and the fiber fabric layer 3 are measured under the above-mentioned conditions using a D65 light source so that ΔE* is equal to or greater than 30. In this way, the cross-sectional colors of the skin layer 2 and the fiber fabric layer 3 become the colors of the side surfaces 5 of the holes 4, so that the former and latter colors are in a different color relationship, resulting in a skin material for automobile interiors 1 in which the side surfaces 5 of the holes 4 include different colors.

[0032] It is also preferable that the cross-sectional color of the skin layer 2 is different from the cross-sectional color of the fiber fabric layer 3. In this way, a definite change in the appearance of the different colors can be achieved, resulting in an exceptionally excellent design.

[0033] Moreover, the layers laminated on the back side of the skin layer are preferably a resin layer 6 and a fiber fabric layer 3, in that order. That is, a resin layer 6 is provided between the skin layer 2 and the fiber fabric layer 3, and the resin layer 6 contains one or two resins selected from the group consisting of polyvinyl chloride resins and polyurethane resins. By adopting such a configuration, the side surface 5 of the hole 4 can be sufficiently visually recognized, and the side surface 5 of the hole 4 can have an increased variety of different colors, resulting in an even more excellent design (Figs. 4 and 5). Fig. 7 shows a case where a resin layer 6 is provided between the skin layer 2 and the fiber fabric layer 3, the skin layer 2 is black, and the resin layer 6 and the fiber fabric layer 3 are orange. Example 1The skin layer 2 and the fiber fabric layer 3 are different colors, and the resin layer 6 and the fiber fabric layer 3 are the same color.

[0034] Furthermore, it is preferable that the thickness t1 of the skin layer 2 is in a range that satisfies the relationship of 1 / 10 to 1 / 5 of the sum of the thickness t3 of the resin layer 6 and the thickness t2 of the fiber fabric layer 3 (FIG. 4). By setting the thickness t1 within this range, the skin material 1 having the specific type of resin layer 6 between the skin layer 2 and the fiber fabric layer 3 and having the thickness relationship between the skin layer 2, the resin layer 6, and the fiber fabric layer 3 within the specific range allows the side surfaces 5 of the holes 4 to be sufficiently visible, and the side surfaces 5 of the holes 4 can be provided in an increased variety of different colors, resulting in an even more excellent design.

[0035] The resin layer 6 is formed by applying a resin composition containing a foaming agent, a plasticizer, a heat stabilizer, a flame retardant, a solvent, a pigment, etc., appropriately according to the above-mentioned resin, onto the skin layer 2 using a comma coater, and then heat-treating the resin composition. The resin layer 6 may be two or more layers, and may have different compositions. When the skin layer 2 contains a polyvinyl chloride resin, the resin layer 6 is preferably foamed, and the resin layer 6 and the fiber fabric layer 3 are preferably laminated via an adhesive layer. The adhesive layer is made of a resin containing a plasticizer, a heat stabilizer, a flame retardant, a pigment, etc. The plasticizer, the heat stabilizer, and the flame retardant may be appropriately selected and used.

[0036] The thickness of the resin layer 6 is preferably in the range of 200 μm to 700 μm, within the range where the thickness t1 of the skin layer 2 satisfies the relationship between the thickness t3 of the resin layer 6 and the thickness t2 of the fiber fabric layer 3. It is also preferable to laminate the fiber fabric layer 3 to the resin layer 6 via an adhesive layer. When the skin layer 2 contains a polyvinyl chloride resin, for example, a polyvinyl chloride resin can be used as the adhesive layer. On the other hand, when the skin layer 2 contains a polyurethane resin, for example, a polyurethane resin can be used as the adhesive layer.

[0037] It is preferable that the cross-sectional color of the skin layer 2 and the cross-sectional color of the resin layer 6 are similar colors. In this case, the cross-sectional color of the fiber fabric layer 3 is different from the cross-sectional color of the skin layer 2. It is also preferable that the cross-sectional color of the skin layer 2 and the cross-sectional color of the resin layer 6 are different colors. In this case, the cross-sectional color of the fiber fabric layer 3 is different from or similar to the cross-sectional color of the skin layer 2. It is also preferable that the cross-sectional color of the resin layer and the cross-sectional color of the fiber fabric layer are similar colors. In this case, the cross-sectional color of the fiber fabric layer 3 is different from the cross-sectional color of the skin layer 2. It is also preferable that the cross-sectional color of the resin layer and the cross-sectional color of the fiber fabric layer are different colors. In this case, the cross-sectional color of the fiber fabric layer 3 is different from or similar to the cross-sectional color of the skin layer 2. In this way, the appearance of different colors provides further variation, and therefore an exceptionally excellent design can be achieved.

[0038] In the present invention, the similar colors have a ΔE* value calculated from color measurement results at a viewing angle of 10 degrees using a D65 light source in the CIE (International Commission on Illumination) L*a*b* color system of 20 or less. Conversely, if the ΔE* value is 20 or more, it becomes difficult to recognize the colors as similar at a glance.

[0039] It is preferable to provide a surface treatment layer on the surface side of the skin layer 2 of the present invention. The surface treatment layer can be any polyurethane resin, not limited to solvent-based or water-based, but polycarbonate-based polyurethane is preferable because it has excellent hydrolysis resistance and light resistance, and either solvent-based or water-based polyurethane may be used. The thickness of the surface treatment layer is preferably in the range of 5 μm to 40 μm, and it can be formed by coating using a gravure roll, for example. EXAMPLES

[0040] Next, specific examples of the present invention will be described, but the present invention is not particularly limited to these examples in which the skin material has two or three layers.

[0041] <Composition, materials used, etc.> Surface layer A: 100 parts by weight of solvent-based polyurethane Dimethylformamide 30 parts by weight Methyl ethyl ketone 30 parts by weight Pigment (choose appropriately) Skin layer B: 100 parts by weight of polyvinyl chloride Plasticizer 85 parts by weight Heat stabilizer 4 parts by weight Flame retardant (antimony trioxide) 3 parts by weight Pigment (choose appropriately)

[0042] Fabric layer: Tricot knitted fabric made of 167T / 48f polyester fiber yarn (density: 38 courses / inch, 46 wales / inch, thickness: 0.6 mm)

[0043] Resin layer: 85 parts by weight of polyvinyl chloride Plasticizer 50 parts by weight Heat stabilizer 2 parts by weight Foaming agent 2 parts by weight Flame retardant (antimony trioxide) 10 parts by weight Pigment (choose appropriately)

[0044] Adhesive layer A: 100 parts by weight of polyvinyl chloride Plasticizer 65 parts by weight Heat stabilizer 2 parts by weight Flame retardant (antimony trioxide) 5 parts by weight Pigment (choose appropriately) Adhesive layer B: 100 parts by weight of solvent-based polyurethane Crosslinking agent 8 parts by weight Dimethylformamide 20 parts by weight Methyl ethyl ketone 20 parts by weight Flame retardant (phosphorus-based) 25 parts by weight Pigment (choose appropriately)

[0045] Surface treatment layer: Polycarbonate-based polyurethane (solvent-based) 70 parts by weight Polycarbonate-based polyurethane (solvent-based) 30 parts by weight Solvent (select appropriately)

[0046] <Reference example 1> A resin liquid obtained by adding a pigment to the above-mentioned formulation of skin layer A and making it black was applied to a release paper using a comma coater so that the coating thickness was 200 μm, and then dried at 180 °C for 1 minute to form a skin layer. A fiber fabric layer dyed red was placed on the obtained skin layer, and then the fiber fabric layer was laminated by nipping and pressing with a nip roll. Next, a punching die equipped with a cylindrical needle with an outer diameter of 1.3 mm was used to punch from the skin layer side to form a hole penetrating the fiber fabric layer from the skin layer, and a skin material for automobile interiors was obtained. The diameters of the hole on the skin layer side and the fiber fabric layer side were 1.0 mm and 0.8 mm, respectively. The color measurement result △E* was 51.36, and the skin material was evaluated as "◎" and passed.

[0047] <Reference example 2> Reference example 1 In the above, the colors of the surface layer and the fiber fabric layer were changed. That is, the surface layer A was made light gray by using a pigment, and the fiber fabric layer was dyed orange. Reference example 1 The result of the color measurement was △E* of 49.02, and the evaluation of the skin material was "◯" and it passed.

[0048] <Reference example 3> Reference example 1 In the above, the color of the fiber fabric layer was changed. That is, except that the fiber fabric layer was dyed in ocean gray. Reference example 1 The skin material was obtained in the same manner as in Example 1. The color measurement result △E* was 35.79, and the skin material was evaluated as "○" and passed.

[0049] <Example 1> The resin liquid obtained by adding a pigment to the above-mentioned formulation of the skin layer B and making it black was applied to the release paper with a comma coater so that the coating thickness was 200 μm, and then dried at 180 ° C for 1 minute to form a skin layer. Next, the resin liquid obtained by adding a pigment to the above-mentioned formulation of the resin layer and making it orange was applied to the skin layer with a comma coater so that the coating thickness was 400 μm, and then dried at 165 ° C for 1 minute to form a resin layer. Furthermore, the liquid obtained by the above-mentioned formulation of the adhesive layer A was applied to the obtained resin layer with a comma coater, and a fiber fabric layer dyed orange was superimposed, and then the fiber fabric layer was laminated by nipping with a nip roll and dried at 180 ° C for 1 minute. In this way, a foamed resin layer was provided between the skin layer and the fiber fabric layer. Next, a punching die equipped with a cylindrical needle having an outer diameter of 1.3 mm was used to punch from the skin layer side to form a hole penetrating the fiber fabric layer from the skin layer, and a skin material for automobile interior was obtained. The diameter of the hole on the skin layer side was 1.0 mm, and the diameter on the fiber fabric layer side was 0.8 mm. The color measurement result △E* was 74.75, and the skin material was evaluated as "◎" and passed.

[0050] <Example 2> Example 1 In the above, the colors of the resin layer and the fiber fabric layer were changed. That is, a resin solution in which a pigment was added to the resin layer to make it yellow was used on the skin layer, and a fiber fabric layer dyed yellow was used. Example 1 The result of the color measurement was △E* of 60.02, and the evaluation of the skin material was "◎", which was acceptable.

[0051] <Example 3> Example 2 In the above, the colors of the skin layer and the resin layer were changed. That is, the skin layer B was yellow in color due to the addition of a pigment to the composition, and the resin layer on top of the skin layer was blue in color due to the addition of a pigment to the composition. Example 2 A skin material for automobile interiors was obtained in the same manner as in Example 1. The result of color measurement was △E* of 66.5, and the skin material was evaluated as "◎" and passed the test.

[0052] <Example 4> Example 3In the above, the color of the skin layer was changed. That is, the skin layer B was mixed with a pigment to make it red. Example 3 The result of the color measurement was △E* of 42.22, and the evaluation of the skin material was "◯" and it passed.

[0053] <Example 5> Example 1 In the above, the colors of the surface layer, the resin layer, and the fiber fabric layer were changed. That is, a pigment was added to the formulation of the surface layer B to make it blue, and a resin liquid was used on the surface layer to make the resin layer red by adding a pigment to the formulation, and a fiber fabric layer dyed red was used. Example 1 The result of the color measurement was △E* of 63.02, and the evaluation of the skin material was "◎", which was acceptable.

[0054] [Table 1]

[0055] <Comparative Example 1> Reference example 1 In the above, the color of the fiber fabric layer was changed. That is, except that a fiber fabric layer dyed black was used as the fiber fabric layer. Reference example 1 A skin material for automobile interiors was obtained in the same manner as in Example 1. The color measurement result △E* was 2.86, and the skin material was evaluated as "×" and failed.

[0056] <Comparative Example 2> Example 3 In other words, the color of the resin layer was changed. In other words, a resin liquid with a yellow color was used on top of the skin layer by adding a pigment to the resin layer. Example 3 The skin material was obtained in the same manner as in Example 1. The color measurement result △E* was 17.63, and the skin material was evaluated as "×" and failed.

[0057] As is clear from Table 1, Examples 1 to 5 The vehicle interior material of Example 1 had a different color that was easily visible on the side of the hole, and exhibited excellent design. On the other hand, in Comparative Examples 1 and 2, it was difficult to say that a distinct different color was visible on the side of the hole.

[0058] <Evaluation method for skin materials> The skin material was evaluated comprehensively by colorimetry and visual inspection. Colorimetry of the surface layer and fiber fabric layer was performed using NF555 manufactured by Nippon Denshoku Industries Co., Ltd. (D65 light source) to obtain the L*, a*, and b* values. In addition, colorimetry (D65 light source) of the side of the hole in the resin layer was performed using VSS7700 manufactured by Nippon Denshoku Industries Co., Ltd., which can measure color with a circle of 30 μm in diameter, to obtain the L*, a*, and b* values. The color difference ΔE* was calculated from the respective L*, a*, and b* values. Next, the covering material was placed on a desk, and the surface of the covering material, as well as the holes and the sides of the holes, were visually observed from five directions, namely directly above the covering material, diagonally upward from the front, diagonally upward from the rear, diagonally upward from the right, and diagonally upward from the left, in comparison with Comparative Example 1. A color difference ΔE* of 50 or more indicated a clearly discernible different color, a color difference ΔE* of 30 or more and less than 50 indicated a discernible different color, and a color difference ΔE* of less than 30 was only faintly visible or not visible at all, so the covering material was evaluated according to the following judging criteria. A judgement of "◯" or higher was deemed to be a pass. (Judgment criteria) "◎": Color difference △E* is 50 or more. "Good": Color difference △E* is 30 or more and less than 50. "X": Color difference △E* is less than 30. [Industrial Applicability]

[0059] The automotive interior covering material according to the present invention can be suitably used for seats, doors, ceilings, instrument panels, and the like. [Explanation of symbols]

[0060] 1. Skin materials (skin materials for automobile interiors) 2... Epidermal layer 3. Fiber fabric layer 4...hole 5. Hole side 6. Resin layer d1: diameter of the hole on the epidermis side d2: diameter of hole on fiber fabric layer side t1: skin thickness t2: Thickness of the fiber fabric layer t3: Resin layer thickness

Claims

1. The skin material includes a skin layer and a layer laminated on a back side of the skin layer, the surface layer contains one or two resins selected from the group consisting of polyvinyl chloride resins and polyurethane resins, the layers laminated on the back side of the skin layer are a resin layer and a fiber fabric layer, in that order, and the resin layer laminated on the back side of the skin layer is a layer containing one or two types of resin selected from the group consisting of polyvinyl chloride resins and polyurethane resins; The fiber fabric layer is a tricot knit fabric, a thickness t1 of the skin layer is 1 / 10 to 1 / 5 of a sum of a thickness t3 of the resin layer laminated on the back side of the skin layer and a thickness t2 of the fiber fabric layer laminated on the back side of the skin layer; and The thickness t3 of the resin layer is 200 μm to 700 μm, The thickness t2 of the fiber fabric layer is in the range of 200 μm to 1,500 μm, the skin material has a plurality of punched cone-shaped holes penetrating from a skin layer on a front side of the skin material to a fiber fabric layer on a back side of the skin material, The diameter d1 of the hole on the skin layer side is in the range of 0.8 mm to 1.5 mm, The side surface of the hole is visible from the skin layer side, At least one of the surface layer, the resin layer, and the fiber fabric layer has a side surface of the hole that is a different color from any of the other layers; The different color has a color difference from the surface layer of ΔE*=30 or more.

2. 2. The skin material for automobile interiors according to claim 1, wherein the cross-sectional color of the resin layer is different from the cross-sectional color of the skin layer, and the cross-sectional color of the fiber fabric layer is similar to the cross-sectional color of the resin layer.

3. 2. The skin material for automobile interiors according to claim 1, wherein a cross-sectional color of the surface layer, a cross-sectional color of the resin layer, and a cross-sectional color of the fiber fabric layer are different from one another.

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