JP6965033B2 - Vehicle interior composite material - Google Patents

Description

The present invention relates to composite materials used in vehicle interiors.

A three-dimensional design may be given to the vehicle interior material. For example, Patent Document 1 teaches that unevenness is formed on the skin material of a vehicle interior material.

International Publication No. 2017/006556 Pamphlet

In recent years, there has been a growing tendency for vehicle interior materials to have a high-class feel. For example, as in Patent Document 1, when the skin material has three-dimensional unevenness, the interior material has a high-class feeling.

By the way, since passengers and loads frequently come into contact with the skin material, wear resistance and high tear strength are required. However, it is difficult to obtain the above performance with a skin material having a three-dimensional shape.

An object of the present invention is to provide a composite material having a three-dimensional and high-class design and having wear resistance and tear strength suitable for vehicle interior materials.

One aspect of the present invention is a composite material for vehicle interiors, wherein a skin material arranged on the outermost side of one of the composite materials, a backing material arranged on the outermost side of the other composite material, and the above. A first adhesive layer interposed between the skin material and the back material and adjacent to the back material is provided, and the skin material includes a plurality of first pleats of the skin material. The mass per unit area when the first pleats are stretched is 200 to 400 g / m ² , and the peel strength of the first adhesive layer between the skin material and the backing material is 170 N or more. There is a composite material for vehicle interiors.

The vehicle interior composite material further comprises one or more intermediate materials interposed between the skin material and the backing material, and a second adhesive layer interposed between the skin material and the intermediate material and adjacent to the intermediate material. And, it is preferable to provide. At this time, it is preferable that the intermediate material includes the second pleats corresponding to the first pleats of the skin material, and the second adhesive layer is formed of a thermoplastic resin.

The peel strength of the second adhesive layer between the skin material and the intermediate material is preferably 70 N or more.

The thickness of the first pleats of the skin material when stretched is preferably 0.5 to 1 mm.

The backing material preferably has a thickness of 0.3 to 0.6 mm and a mass per unit area of 150 to 400 g / m ² .

The vehicle interior composite material according to the present invention is excellent in design because the skin material is provided with pleats. Further, the pleats have a sharp shape and excellent shape retention. In addition, the composite has wear resistance and tear strength suitable for vehicle interior materials.

It is a perspective view which shows a part of the skin material which concerns on embodiment of this invention typically. It is a top view which shows a part of the other skin material which concerns on embodiment of this invention typically. It is a top view which shows a part of the other skin material which concerns on embodiment of this invention typically.

The vehicle interior composite material (hereinafter, may be simply referred to as a composite material) according to the present embodiment includes a skin material arranged on the outermost side of one surface, a backing material arranged on the outermost side of the other material, and a skin surface. An adhesive layer (first adhesive layer) interposed between the material and the backing material is provided. The composite material is used as a vehicle interior material such as a ceiling material, a door material, a seat material, and a floor material inside the vehicle. In this case, the composite material is arranged so that the skin material faces the space inside the vehicle.

The skin material includes a plurality of pleats (first pleats). The first pleats (creases) give the skin material a three-dimensional effect to improve the design, and a high-quality composite material can be obtained. When the first pleats of the skin material are stretched (for example, the skin material before pleating), the mass per unit area (hereinafter, simply referred to as mass W1) is 200 to 400 g / m ² . The pleating process is performed by folding the skin material into a desired pleated shape to form creases, and then heat-treating the material. When the mass W1 is in the above range, the skin material is easily folded, so that a sharp crease can be formed in a desired shape. That is, such a skin material is easy to pleate into a desired shape and has high pleating workability. In addition, the resulting creases are sharp and highly pleated. Further, the skin material having such a mass W1 has wear resistance and tear strength (hereinafter, may be collectively referred to as durability) suitable for vehicle interior materials.

The backing material has a function of being laminated on the skin material provided with the first pleats and holding the first pleats. The skin material and the back material are adhered to each other via at least a first adhesive layer. At this time, the peel strength between the skin material and the back material is 170 N or more. As a result, when the passenger gets on and off or when the load is loaded or unloaded, the skin material and the back material are suppressed from peeling off, and the shape of the pleats of the skin material is maintained.

(Skin material)
The skin material comprises a plurality of first pleats. The shape of the first pleats is not particularly limited, and may be appropriately set so that a design suitable for the purpose can be obtained. When the skin material has a mass W1 in the above range, desired pleats can be formed with high accuracy. The mass W1 is preferably 200 to 300 g / m ^2.

1 to 3 show a part of the skin material on which the first pleats are formed. However, the first pleats are not limited to this. FIG. 1 is a perspective view schematically showing the skin material 1 according to the present embodiment. FIG. 2 is a top view schematically showing another skin material 1 according to the present embodiment. FIG. 3 is a top view schematically showing another skin material 1 according to the present embodiment. In FIG. 1, the plurality of first pleats 1a are formed along one direction. In FIG. 2, the plurality of first pleats 1a are formed so as to intersect with each other. In FIG. 3, a plurality of first pleats 1a are formed so as to intersect with each other, and the folding width thereof gradually changes.

The form of the skin material is not particularly limited, and may be, for example, a fiber structure such as a woven fabric, a knitted fabric, or a non-woven fabric, or a natural leather or the like. Further, artificial leather or synthetic leather in which the fiber structure is processed with resin may be used. Among them, the fiber structure is preferable in that the pleating workability and the pleating shapeability are further improved. The skin material may be a laminate of a plurality of fiber structures.

When the skin material is a fiber structure, the fibers (first fibers) constituting the skin material preferably contain a thermoplastic resin. This is because the pleated shape is more likely to be improved. Examples of fibers containing a thermoplastic resin (hereinafter referred to as thermoplastic fibers) include synthetic fibers such as polyester fibers, polypropylene fibers and nylon fibers, and semi-synthetic fibers such as acetate fibers and triacetate fibers. These may be used alone or in combination of two or more. Among them, synthetic fibers are preferable, polyester fibers are more preferable, and polyethylene terephthalate (PET) fibers are particularly preferable, because they are excellent in physical properties (particularly, strength, abrasion resistance, and heat resistance). The fiber structure may contain fibers other than thermoplastic fibers. Examples of fibers other than thermoplastic fibers include natural fibers and regenerated fibers. The plurality of types of fibers are combined by methods such as blended spinning, blended fibers, cross-twisting, cross-weaving, and cross-knitting. However, considering the pleating processability, it is preferable that the thermoplastic fiber occupies 50% by mass or more of the skin material.

When the skin material is a woven fabric or a knitted material, the bending of the skin material is preferably 2% or less in both the vertical direction and the horizontal direction. When the bending is 2% or less, the elongation of the epidermis material in the vertical direction and the horizontal direction is well-balanced, so that the pleated shapeability is likely to be improved. The bend of a woven fabric or knit is measured according to JIS L 1096 8.12 (bend of cloth).

The fineness of the first fiber is not particularly limited. Among them, the fineness of the first fiber is preferably 117 dtex or more in terms of excellent durability. On the other hand, the fineness of the first fiber is preferably 225 dtex or less in that the pleated processability and the pleated moldability are more likely to be improved.

The form of the first fiber is also not particularly limited. The first fiber may be, for example, a short fiber such as a spun yarn, a long fiber such as a multifilament yarn or a monofilament yarn, or a long / short composite spun yarn in which a long fiber and a short fiber are combined. May be good. The multifilament yarn may be twisted, or may be subjected to a process such as false twisting or liquid disturbance treatment.

The thickness T1 when the first pleats of the skin material are stretched is not particularly limited. Above all, from the viewpoint of durability and pleating workability, it is preferably 0.5 to 1 mm. Further, when the thickness T1 of the skin material is in the above range, the pleated shapeability is also improved. The thickness T1 of the skin material may be the thickness of the skin material before pleating. The thickness T1 of the skin material is obtained, for example, by averaging the thicknesses of any 10 points of the skin material. The thickness of an arbitrary portion of the skin material can be measured with, for example, PEACOCK H-30 (manufactured by Ozaki Seisakusho Co., Ltd.). The same applies to the thickness T2 of the backing material and the thickness T3 of the intermediate material.

(Backing material)
The backing material is laminated on the skin material to fix and hold the first pleats formed on the skin material, thereby improving the shape retention of the first pleats.
The form of the backing material is not particularly limited, and examples thereof include materials similar to the skin material. Among them, a fiber structure is preferable, and a woven fabric is more preferable, because the shape retention of the first pleats can be easily improved.

When the backing material is a fiber structure, the fibers (second fibers) constituting the backing material are not particularly limited, and examples thereof include fibers similar to the first fibers. Among them, synthetic fibers are preferable, polyester fibers are more preferable, and PET fibers are particularly preferable, because the shape retention of the first pleats can be easily improved. The form of the second fiber is not particularly limited, and may be the same as that of the first fiber.

The fineness of the second fiber is not particularly limited, and may be 117 to 225 dtex. When the fineness of the second fiber is within this range, the shape retention of the first pleats is further improved, and the durability of the composite material is likely to be improved.

Mass per unit area of the backing (hereinafter, simply referred to as mass W2.) Is preferably 150 and 400 / ^{m 2,} and more preferably 150 to 250 g / ^{m 2.} When the mass W2 is in this range, the durability of the composite material is likely to be improved, and the flexibility is not easily impaired. The thickness T2 of the backing material is not particularly limited, but is preferably 0.3 to 0.6 mm in that wear resistance is easily improved and shape retention of the first pleats is easily improved.

(First adhesive layer)
The first adhesive layer is interposed between the skin material and the back material, and the back material and the skin material are adhered to each other via an intermediate material described later, if necessary.

The first adhesive forming the first adhesive layer is not particularly limited, and may be a thermoplastic resin or a thermosetting resin. The thermoplastic resin is not particularly limited as long as it exhibits adhesiveness by being cooled after melting, and examples thereof include polyamide resin, polyester resin, polyurethane resin, polyolefin resin, styrene resin, and acrylic resin. These can be used alone or in admixture of two or more. Of these, a polyamide resin is preferable because of its high versatility. The melting point of the thermoplastic resin is preferably 110 to 180 ° C., more preferably 110 to 150 ° C. from the viewpoint of heat resistance and productivity. The thermosetting resin is also not particularly limited, and examples thereof include an epoxy resin and the like.

The amount of the first adhesive is not particularly limited. Among them, from the viewpoint of adhesiveness, the first adhesive applied per unit area of the base material (the skin material or intermediate material to which the first pleats are stretched, or the backing material) to which the first adhesive is applied. mass (hereinafter, simply referred to as mass a1.) is preferably 10 to 100 g / ^{m 2,} and more preferably 20 to 50 g / ^{m 2.}

The peel strength F1 between the skin material and the backing material adhered via the first adhesive layer (further, the intermediate material described later) is 170 N or more, preferably 190 N or more. The upper limit of the peel strength F1 is not particularly limited. When the composite material includes an intermediate material, the peel strength F1 is the peel strength between the intermediate material and the backing material.

The peel strength F1 is measured by, for example, a method according to JIS Z 0237. The peel strength F1 is specifically measured as follows. First, a test piece having a width of 150 mm and a length of 100 mm is collected from the composite material. After the obtained test piece is attached to the test plate with double-sided tape, the test plate is fixed to the tensile tester. Under the conditions of room temperature 23 ± 2 ° C. and humidity 50 ± 4% RH, the pleated part of the test piece is sandwiched by a gripping jig, and the sandwiched pleated part and the other part are always 90 ° with respect to the test plate. Move the gripping jig at a constant speed so that the angle is as shown in. Here, when the composite material includes an intermediate material, the pleated portion in which all the intermediate materials are folded together with the skin material is sandwiched by a gripping jig. The force required for peeling the backing material and the skin material (or intermediate material) at this time is represented by a graph in which the peeling distance is on the x-axis and the peeling strength is on the y-axis. The peel strength F1 is the maximum value shown in the graph (when there are a plurality of maximum values, the maximum maximum value).

(Intermediate material)
It is preferable that one or more intermediate materials are arranged between the skin material and the back material. The intermediate material includes pleats (second pleats) corresponding to the first pleats included in the skin material, and has a function of reinforcing the first pleats.

The intermediate material is pleated together with, for example, the skin material, as will be described later. Therefore, it is required to be flexible enough to follow the skin material and to easily form sharp creases. On the other hand, it is also necessary to have enough rigidity to reinforce the formed first pleats. Considering these, the fiber structure is preferable as the intermediate material, and the woven fabric is particularly preferable.

In this case, the fineness of the fibers (third fibers) constituting the intermediate material is preferably 20 to 50 dtex. From the same viewpoint, the mass per unit area of the intermediate material is preferably 20 to 50 g / ^{m 2,} and more preferably 20 to 30 g / ^{m 2.} The thickness T3 of the intermediate material is preferably 0.2 to 0.5 mm. The type and form of the third fiber are not particularly limited, and may be the same as the first fiber.

(Second adhesive layer)
When the composite material includes an intermediate material, the skin material and the intermediate material, and further, the plurality of intermediate materials are adhered to each other by the second adhesive layer. In this case, the skin material and one or more intermediate materials are adhered to each other via the second adhesive layer, and then pleated.

The adhesive (second adhesive) forming the second adhesive layer is not particularly limited, and may be the same as the first adhesive. However, considering that the laminate of the skin material and the intermediate material can be pleated a plurality of times, the second adhesive is preferably a thermoplastic resin having a melting point of 110 to 180 ° C. Examples of such a second adhesive include the thermoplastic resin exemplified as the first adhesive.

The amount of the second adhesive is also not particularly limited, but from the viewpoint of adhesiveness, the unit area of the base material to which the second adhesive is applied (skin material or intermediate material in which the first pleats are stretched, or backing material). the second mass of adhesive (hereinafter, simply referred to as mass a2.) applied per is preferably 10 to 100 g / ^{m 2,} and more preferably 20 to 50 g / ^{m 2.}

The peel strength F2 between the skin material and the intermediate material adhered via the second adhesive layer is preferably 70 N or more, and more preferably 90 N or more. As a result, peeling between the skin material and the intermediate material is suppressed, and the shape retention of the first pleats is more likely to be improved. The upper limit of the peel strength F2 is not particularly limited, but is, for example, 170N. When there are a plurality of intermediate materials, the peel strength F2 is the peel strength between the skin material and any intermediate material.

The peel strength F2 is measured by the same method as the peel strength F1 except that a test piece provided with an intermediate material is used and a pleated portion in which the intermediate material is not folded is sandwiched between gripping jigs.

(Composite material)
The composite material provided with the above-mentioned skin material has high durability suitable for vehicle interior materials.
For example, the tear strength of the composite material is 70 N or more. If the tear strength is in this range, the composite has sufficient durability for vehicle interiors. The upper limit of the tear strength is not particularly limited, but is, for example, 2000N.

When the skin material is a woven fabric or a knitted material, the tear strength of the composite material in the vertical direction of the skin material is preferably 70 N or more, more preferably 70 to 400 N. The tear strength of the composite material in the horizontal direction of the skin material is preferably 700 N or more, and preferably 700 to 2000 N.

In addition, the composite material has excellent wear resistance. For example, when the skin material is formed of a fiber structure, when the skin material side of the composite material is worn by a method according to JIS L1096 8.19.3 C method (Teva type method), the surface condition of the skin material is changed. There is no change in, or there is only a slight fluffing.

(Manufacturing method of composite material)
Hereinafter, a method for producing a composite material will be described. However, the method for producing the composite material of the present embodiment is not limited to this.

The composite material is, for example, a pleating step of forming the first pleats on the skin material and a backing material laminating step of laminating the backing material on the skin material on which the first pleats are formed via the first adhesive layer. And, manufactured by a method comprising.

(1) Pleat process The method of forming the first pleats on the skin material (pleating method) is not particularly limited, and a conventionally known method can be used. For example, the skin material is sandwiched between two patterns and then folded together with the patterns. After removing the paper pattern, heat treatment is performed to fix the pleats. The step of folding the skin material may be hand folding (so-called hand pleating), or may be performed using a pleating machine that performs pleating by a reciprocating type, a rotary type, a striping type, or the like. Prior to the pleating step, the skin material is subjected to a pretreatment such as presetting and refining, and a coloring step such as dyeing, if necessary.

The pleating process can be performed multiple times. For example, the orientation of the skin material on which the pleats are formed may be changed, and the same pattern may be used for pleating again. Alternatively, the skin material on which the pleats are formed may be pleated a second time using another pattern. As a result, a skin material having intersecting pleats as shown in FIGS. 2 and 3 and a skin material having more complicated pleats can be obtained.

(2) Backing Material Laminating Step The backing material is laminated on one main surface of the skin material on which the first pleats are formed via the first adhesive layer. As a result, a composite material is obtained. After laminating the backing material, it is preferable to press the composite material while heating it. As a result, the first pleats are sharpened and the shape retention is further improved. The heating and pressing of the composite material can be performed using a conventionally known device. The conditions are not particularly limited, and may be appropriately set according to the equipment to be used, the material of the composite material, and the like.

The first adhesive layer is preferably formed of a non-woven first adhesive. This is because the shape retention of the first pleats is likely to be improved. For example, the first adhesive layer is formed by melting a non-woven fabric formed of a fibrous thermoplastic resin.

(3) Intermediate Material Laminating Step Before the backing material laminating step, the intermediate material may be laminated on the skin material via the second adhesive layer.
In this case, pleating is performed on the laminate of the skin material and the intermediate material. As a result, the intermediate material is formed with the second pleats corresponding to the first pleats of the skin material. When the pleating process is performed a plurality of times, the laminated body of the skin material and the intermediate material may be pleated a plurality of times in succession. Further, after pleating the laminate of the skin material and the intermediate material, another intermediate material is laminated on the intermediate material side via the second adhesive layer, and then pleating is performed from the next time onward. You may. That is, after the Nth (N ≧ 1) pleating process, the Mth (M ≧ 1) intermediate material is laminated on the pleated skin material (or a laminate of the skin material and the intermediate material). After that, N + 1th pleating may be performed. In this case, complicated pleats are formed and their shape retention is improved.

From the viewpoint of pleated shapeability, the second adhesive layer is preferably formed of a non-woven fabric-like second adhesive. For example, the second adhesive layer, like the first adhesive layer, is formed by melting a non-woven fabric formed of a fibrous thermoplastic resin.

[Example]
Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

The evaluation of the obtained composite material was carried out according to the following method.
(1) Tear strength The measurement was performed under the following conditions according to JIS L1096 8.17.1 A-1 (single tongue method). From the composite material, five test pieces having a width of 50 mm and a length of 150 mm having a long side along the vertical direction of the skin material and five test pieces having a width of 50 mm and a length of 150 mm having a long side along the horizontal direction of the skin material. And collected. A 50 mm long notch was made in each test piece from the center of one short side to the inside in parallel with the long side to form a right tongue piece and a left tongue piece on the short side. A pair of gripping jigs equipped in a tensile tester (Autograph AG-100A, manufactured by Shimadzu Corporation) under the conditions of room temperature 23 ± 2 ° C. and humidity 50 ± 4% RH. The tongue pieces were sandwiched without slack, and the test pieces were torn at a grip width of 30 mm, a grip interval of 25 mm, and a grip jig moving speed of 200 mm / min. The maximum load (N) until the test piece was cut was measured, and the average value of each of the five pieces was taken as the tear strength. If the measured value is 70 N or more in the vertical direction and 700 N or more in the horizontal direction, it can be said that the tear strength is sufficient for use as a vehicle interior material.

(2) Abrasion resistance Measured under the following conditions according to JIS L1096 8.19.3 C method (Teva type method). Five circular test pieces having a diameter of 120 mm were collected from the composite material. The test conditions were a wear wheel CS-10, a load of 4.9 N, and the number of times of wear was 1000 times, and the skin material side was rubbed. The test piece after wear was observed and judged according to the following criteria, and the average value was calculated. If the evaluation standard is grade 3 or higher, it can be said that it has sufficient wear resistance for use as a vehicle interior material.

(Evaluation criteria)
5th grade: No change in surface condition 4th grade: Slight fluffing on fibers 3rd grade: No fluffing on fibers but no change in yarn condition 2nd grade: Fluffing on fibers and fluffing Thread is thin 1st grade: There is a thread break

(3) Formability and shape retention of pleats The pleated shape of the test piece before and after the above wear resistance test was determined according to the following criteria. The pleated shape of the test piece before the wear resistance test was evaluated as the pleated shape property, and the pleated shape of the test piece after the wear resistance test was evaluated as the shape retention property.

(Evaluation criteria)
Best: The creases are not rounded at all and are extremely sharp. Good: The creases are not rounded and sharp. Bad: The creases are rounded and lack sharpness.

[Example 1]
The following skin material was folded into the shape shown in FIG. 1 using a paper pattern. Then, the skin material provided with the first pleats was obtained by pressing while heating.
The skin material is a dobby fabric with a mass of W1: 250 g / m ² (warp: PET fiber with a fineness of 167 dtex, weft: PET fiber with a fineness of 167 dtex, density: 180 vertical / 25.4 mm, 60 horizontal / 25.4 mm, Thickness T1: 0.7 mm, bending rate: 0.5%) was used.

The following backing material is provided on one main surface of the obtained skin material via a non-woven polyamide resin (adhesive A1, melting point 112 ° C.) having ^{a mass a1 of 30 g / m 2 as a first adhesive layer.} Was laminated. Then, the obtained laminate was pressed while heating at a temperature of 170 ° C. to obtain a vehicle interior composite material. The evaluation results are shown in Table 1.

The backing material is a dobby fabric with a mass of W2: 190 g / m ² (warp: 167 dtex PET fiber, weft: 167 dtex PET fiber, density: vertical 120 / 25.4 mm, horizontal 70 / 25.4 mm, thickness T2. : 0.45 mm) was used.

The peel strength F1 was measured as follows.
A test piece having a width of 150 mm and a length of 100 mm was collected from the composite material. After the obtained test piece was attached to the test plate with double-sided tape, the test plate was fixed to a tensile tester (Autograph AG-100A, manufactured by Shimadzu Corporation). The pleated part of the test piece is sandwiched between the gripping jigs under the conditions of room temperature 23 ± 2 ° C. and humidity 50 ± 4% RH, and is sandwiched under the conditions of a gripping width of 65 mm and a moving speed of the gripping jig of 200 mm / min. The skin material was peeled from the test piece so that the first pleats were always at an angle of 90 ° with respect to the test plate. The maximum value of the maximum value of the graph showing the transition of the force required for peeling between the backing material and the skin material was defined as the peeling strength F1.

[Example 2]
A composite material for vehicle interiors is the same as in Example 1 except that a film-shaped polyamide resin having a mass a1 of 30 g / m ^{2 (adhesive A2, melting point 120 ° C.) is used as the first adhesive layer.} Got The evaluation results are shown in Table 1.

[Comparative Example 1]
A composite material for vehicle interiors is the same as in Example 1 except that a non-woven polyamide resin having a mass a1 of 9 g / m ^{2 (adhesive a1, melting point 112 ° C.) is used as the first adhesive layer.} Got The evaluation results are shown in Table 1.

In both Examples 1 and 2, the pleats have high moldability and shape retention, and are excellent in tear strength and abrasion resistance. On the other hand, Comparative Example 1 in which the peel strength F1 is less than 170 N is excellent in pleated shape, but has low shape retention.

Below, the influence of the mass W1 per unit area of the skin material on the durability of the composite material and the shape of the pleats was investigated.
[Example 3]
As a skin material, a dobby fabric having a mass of W1: 200 g / m ² (warp: 167 dtex PET fiber, weft: 167 dtex PET fiber, density: vertical 150 / 25.4 mm, horizontal 50 / 25.4 mm, thickness T1: Pleating was performed in the same manner as in Example 1 except that 0.4 mm and a bending rate of 0.5%) were used to obtain a precursor of a skin material having the first pleats.

Next, the following intermediate materials were laminated on one main surface of the obtained precursor via a second adhesive layer (adhesive A1). The obtained laminate was pressed while heating at 130 ° C., and then folded into the shape shown in FIG. 2 using another paper pattern. Subsequently, the paper pattern was removed and pressed while heating at 130 ° C. to obtain a laminate having a plurality of first pleats intersecting with each other.

The intermediate material is a plain woven fabric (mass W3: 30 g / m ² , warp: 34 dtex PET fiber, weft: 34 dtex PET fiber, density: vertical 82 / 25.4 mm, horizontal 48 / 25.4 mm, thickness T3. : 0.35 mm) was used.

Then, the same backing material as in Example 1 was laminated on the intermediate material side of the laminated body having the obtained pleats via the first adhesive layer (adhesive A1). Next, the obtained laminate was pressed while heating at 170 ° C. to obtain a vehicle interior composite material. The evaluation results are shown in Table 2.

The peel strength F1 was measured in the same manner as in Example 1 except that the first pleats formed by the second pleating process on the laminate of the skin material and the intermediate material were sandwiched between scissors jigs. bottom.
The peel strength F2 was measured in the same manner as the peel strength F1 except that the first pleats formed by the first pleating process for only the skin material were sandwiched between scissors jigs.

[Example 4]
As a skin material, a dobby fabric with a mass of W1: 210 g / m ² (warp: 167 dtex PET fiber, weft: 167 dtex PET fiber, density: vertical 160 / 25.4 mm, horizontal 50 / 25.4 mm, thickness T1: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 0.5 mm and a bending rate of 0.5%) were used. The evaluation results are shown in Table 2.

[Example 5]
As a skin material, a dobby fabric with a mass of W1: 250 g / m ² (warp: 167 dtex PET fiber, weft: 167 dtex PET fiber, density: vertical 180 / 25.4 mm, horizontal 60 / 25.4 mm, thickness T1: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 0.7 mm and a bending rate of 0.5%) were used. The evaluation results are shown in Table 2.

[Example 6]
As a skin material, a dobby fabric with a mass of W1: 380 g / m ² (warp: 330 dtex PET fiber, weft: 330 dtex PET fiber, density: vertical 160 / 25.4 mm, horizontal 50 / 25.4 mm, thickness T1: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 0.8 mm and a bending rate of 0.5%) were used. The evaluation results are shown in Table 2.

[Example 7]
As a skin material, a dobby fabric with a mass of W1: 390 g / m ² (warp: 330 dtex PET fiber, weft: 330 dtex PET fiber, density: 170 vertical / 25.4 mm, 50 horizontal / 25.4 mm, thickness T1: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 1.1 mm and a bending rate of 0.5%) were used. The evaluation results are shown in Table 2.

[Comparative Example 2]
As a skin material, a dobby fabric with a mass of W1: 190 g / m ² (warp: 167 dtex PET fiber, weft: 167 dtex PET fiber, density: vertical 150 / 25.4 mm, horizontal 50 / 25.4 mm, thickness T1: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 0.3 mm and a bending rate of 0.5%) were used. The evaluation results are shown in Table 2.

[Comparative Example 3]
As a skin material, a dobby fabric with a mass of W1: 420 g / m ² (warp: 330 dtex PET fiber, weft: 500 dtex PET fiber, density: 180 vertical / 25.4 mm, 60 horizontal / 25.4 mm, thickness T1: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 1.2 mm and a bending rate of 0.5%) were used. The evaluation results are shown in Table 2.

Examples 3 to 7 in which the mass W1 per unit area of the skin material is 200 to 400 g / m ² are all excellent in wear resistance, design and shape retention. Among them, Examples 4 to 6 having a skin material thickness T1 of 0.5 to 1 mm are particularly effective. On the other hand, Comparative Example 2 having a ^{mass W1 of less than 200 g / m 2 has insufficient wear resistance.} Therefore, the shape retention is low. Further, in Comparative Example 3 in which the mass W1 exceeds 400 g / m ² , although the durability is excellent, the pleated shape property is low and the shape retention property is also low.

Below, the influence of the mass W2 per unit area of the backing material on the durability of the composite material and the shape of the pleats was investigated.
[Example 8]
As a backing material, a plain woven fabric having a mass W2: 130 g / m ² (warp: 167 dtex PET fiber, weft: 167 dtex PET fiber, density: 110 vertical / 25.4 mm, 60 horizontal / 25.4 mm, thickness T2: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 0.2 mm) was used. The evaluation results are shown in Table 3.

[Example 9]
As a backing material, a plain woven fabric having a mass W2: 150 g / m ² (warp: 167 dtex PET fiber, weft: 167 dtex PET fiber, density: 110 vertical / 25.4 mm, 70 horizontal / 25.4 mm, thickness T2: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 0.3 mm) was used. The evaluation results are shown in Table 3.

[Example 10]
As a backing material, a plain woven fabric having a mass W2: 400 g / m ² (warp: 330 dtex PET fiber, weft: 330 dtex PET fiber, density: vertical 170 / 25.4 mm, horizontal 50 / 25.4 mm, thickness T2: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that the thickness was 0.6 mm). The evaluation results are shown in Table 3.

[Example 11]
As a backing material, a plain woven fabric having a mass of W2: 440 g / m ² (warp: 330 dtex PET fiber, weft: 500 dtex PET fiber, density: 180 vertical / 25.4 mm, 60 horizontal / 25.4 mm, thickness T2: A composite material for vehicle interior was obtained in the same manner as in Example 3 except that 0.7 mm) was used. The evaluation results are shown in Table 3.

From Table 3, when the mass W2 per unit area of the backing material is 150 to 400 g / m ² and the thickness T2 is 0.3 to 0.6 mm, wear resistance, pleated shapeability and shape retention All of them are excellent.

The composite material of the present invention is suitable as a vehicle interior material because it has excellent design and durability.

1: Skin material, 1a: Pleats (creases)

Claims (5)

A composite material for vehicle interiors
The outermost skin material of one of the composite materials and
The outermost backing material of the composite material and
It is provided with a first adhesive layer that is interposed between the skin material and the backing material and is adjacent to the backing material.
The skin material comprises a plurality of first pleats.
The mass per unit area of the skin material when the first pleats are stretched is 200 to 400 g / m ² .
Ri der peel strength than 170N by the first adhesive layer between the backing and the skin material,
The mass of the backing material per unit area is 150 to 400 g / m ² .
The first adhesive layer is formed of the first adhesive,
The mass of the first adhesive per unit area of the first adhesive layer is Ru 10 to 100 g / m ² der, vehicle interior composite material. Further, one or more intermediate materials interposed between the skin material and the backing material, and
A second adhesive layer that is interposed between the skin material and the intermediate material and is adjacent to the intermediate material is provided.
The intermediate material comprises a second pleat corresponding to the first pleat of the skin material.
The composite material for vehicle interior according to claim 1, wherein the second adhesive layer is formed of a thermoplastic resin. The composite material for vehicle interior according to claim 2, wherein the peel strength of the second adhesive layer between the skin material and the intermediate material is 70 N or more. The composite material for vehicle interior according to any one of claims 1 to 3, wherein the thickness of the skin material when the first pleats are stretched is 0.5 to 1 mm. The thickness of the backing is 0.3 to 0.6 mm, a vehicle interior composite material according to any one of claims 1-4.

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