JP2020114891A - Vehicular interior material - Google Patents

Abstract

To provide a vehicular interior material that resists being broken when receiving impact.SOLUTION: A vehicular interior material 1 has a fiber-containing resin molding 2 that contains a thermoplastic resin, plant fibers and high-strength fibers, with a content of the high-strength fibers being 2-20 mass%.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle interior material.

As a vehicle interior material, a plant fiber composite base material (hereinafter, composite base material) obtained by heating and pressurizing a mixture of plant fibers and a thermoplastic resin (fiber) is used (for example, Patent Document 1). .. Since the composite base material is lightweight and has high rigidity, it is widely used as a vehicle interior material such as a door trim.

JP, 2009-234129, A

In recent years, it has been required to improve the impact resistance of this type of vehicle interior material. In particular, there is a need for a vehicle interior material that can absorb shock without being broken (cracked) when the composite base material receives a shock.

Although the conventional composite base material has high rigidity, it sometimes breaks (cracks) when it receives an impact. At the fracture site of the composite base material, the phenomena of "breakage of thermoplastic resin", "interfacial peeling between thermoplastic resin and plant fiber", and "breakage of plant fiber" are mainly observed. In the conventional composite base material, it is presumed that the plant fibers are broken by the impact before the plant fibers move in the form of being pulled out from the thermoplastic resin at the breaking point. That is, in the conventional composite base material, the impact energy is not effectively converted into the friction energy between the thermoplastic resin and the plant fiber, so that it is presumed that rupture (cracking) occurs when the impact is applied. It

An object of the present invention is to provide an interior material for a vehicle in which the occurrence of breakage is suppressed when it receives an impact.

The vehicle interior material according to the present invention includes a fiber-containing resin molded product containing a thermoplastic resin, a plant fiber and a high-strength fiber, and the content ratio of the high-strength fiber is 2 to 20% by mass.

In the fiber-containing resin molded body, the content rate of the plant fiber in the fiber-containing resin molded body is preferably 20 to 90% by mass.

In the fiber-containing resin molded product, it is preferable that the tensile strength of the high-strength fiber is 27 GPa or more.

In the fiber-containing resin molded product, the high-strength fiber may be an aramid fiber, and the content ratio of the high-strength fiber in the fiber-containing resin molded product may be 5 to 20% by mass.

In the fiber-containing resin molded product, the high-strength fiber may be polyparaphenylenebenzobisoxazole fiber, and the content ratio of the high-strength fiber in the fiber-containing resin molded product may be 2 to 20% by mass. ..

ADVANTAGE OF THE INVENTION According to this invention, the interior material for vehicles with which the generation|occurrence|production of fracture|rupture is suppressed when it receives an impact can be provided.

Front view of the vehicle interior material 1 of the first embodiment Sectional drawing of the vehicle interior material 1 of Embodiment 1. Front view of a vehicle interior material 1A of Embodiment 2 The front view of the interior material 1B for vehicles of Embodiment 3.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view of the vehicle interior material 1 of the first embodiment, and FIG. 2 is a sectional view of the vehicle interior material 1 of the first embodiment. The vehicle interior material 1 of the present embodiment is a door trim of a vehicle door (hereinafter, the vehicle interior material 1 may be referred to as a door trim 1). The door trim 1 is attached to a vehicle interior side of a metal vehicle panel provided in a vehicle door.

The door trim 1 is composed of one plate-shaped fiber-containing resin molded body 2 molded into a predetermined shape. Details of the fiber-containing resin molded body 2 will be described later. The door trim 1 is provided with an armrest portion 3, an inside handle 4, a speaker grill 5, a door pocket 6 and the like.

No surface material or the like is attached to the surface of the door trim 1 of the present embodiment, and the surface of the fiber-containing resin molded body 2 constitutes the surface of the door trim 1 as it is.

Hereinafter, the fiber-containing resin molded body 2 that constitutes the door trim 1 will be described in detail. The fiber-containing resin molded product 2 contains a thermoplastic resin, a plant fiber and a high-strength fiber.

The thermoplastic resin is not particularly limited, and examples thereof include polyolefin resins such as polypropylene, polyethylene, and ethylene/propylene random copolymers; aliphatic polyester resins such as polylactic acid, polycaprolactone, and polybutylene succinate, polyethylene terephthalate, Polyester resins such as aromatic polyester resins such as polytrimethylene terephthalate and polybutylene terephthalate; polystyrene; acrylic resins; polyamide resins; polycarbonate resins; polyacetate resins; ABS resins and the like. The thermoplastic resin may be modified (acid anhydride modified, carboxylic acid modified, epoxy modified or oxazoline modified) in order to increase the affinity for the surface of the plant fiber. The thermoplastic resins may be used alone or in combination of two or more. The thermoplastic resin is preferably a polyolefin resin and a polyester resin, and more preferably a polyolefin resin such as polypropylene.

As the thermoplastic resin, a modified one (modified anhydride, acid anhydride modified, carboxylic acid modified, epoxy modified or oxazoline modified) may be used. Examples of the modified thermoplastic resin include an acid-modified polyolefin resin (an example of an acid-modified thermoplastic resin) modified with an acid anhydride such as maleic anhydride.

The content ratio (content ratio) of the thermoplastic resin in the fiber-containing resin molded body 2 is preferably 5 to 80% by mass, more preferably 30 to 70% by mass.

The content ratio (content ratio) of the modified thermoplastic resin (for example, acid-modified polyolefin resin) in the fiber-containing resin molded product 2 is preferably 1.2% by mass or less.

The thermoplastic resin is preferably a resin having a low affinity for plant fibers (that is, a non-modified thermoplastic resin), particularly a non-modified polyolefin-based resin, from the viewpoint of improving impact resistance.

The plant fiber is not particularly limited, and fibers derived from stems, stems, branches, leaves, roots, etc. in plants may be included as they are, and these may be heat treated, dried, milled, chemically treated, etc. It may be processed by. The plant fiber is preferably kenaf, jute, Manila hemp, sisal, goose bark, San camellia, camellia, banana, pineapple, coconut, corn, sugar cane, bagasse, palm, papyrus, reeds, esparto, survival grass, wheat, rice, rice, It is a linear fiber body derived from bamboo, conifers (cedar, cypress, etc.), hardwood, cotton, etc. Of these, mallow plants that have woody stems, are extremely fast-growing annual plants, have excellent carbon dioxide absorption, and contribute to the reduction of carbon dioxide in the atmosphere and effective use of forest resources. It is particularly preferable to use a linear fiber body derived from kenaf (kenaf fiber). Examples of the kenaf include hibiscuc cannabinus and hibiscuc sabdariffa in scientific names, and red rice, cuban kenaf, hemp, taikenaf, mesta, bimli, amber hemp, and bomba hemp in common names.

The plant fiber is usually a solid substance, and its length (fiber length) and outer diameter (fiber diameter) are not particularly limited. The upper limit of the fiber length is preferably 150 mm. The average value of the fiber length is preferably 10 mm to 100 mm, more preferably 30 mm to 80 mm. Further, the upper limit of the fiber diameter is preferably 1500 μm. The average value of the fiber diameter is preferably 20 μm to 500 μm, more preferably 20 μm to 200 μm.

The shape of the plant fiber is not particularly limited. The shape in the length direction may be a linear shape, a broken line shape, a curved shape, a spiral shape, or a modified shape thereof. The outer shape of the cross section can be a circle, an ellipse, a polygon, or a modified shape thereof.

The content ratio (content ratio) of the plant fiber in the fiber-containing resin molded product 2 is preferably 20 to 90% by mass, more preferably 30 to 70% by mass, from the viewpoint of lightness, rigidity, impact resistance and the like.

The high-strength fiber is a fiber having a tensile elastic modulus measured according to JIS L 1015 or JIS L 1013 of preferably 27 GPa or more, more preferably 40 GPa or more, further preferably 50 GPa or more, and particularly preferably 60 GPa or more. Examples of the high-strength fiber include aramid fiber (para type or meta type), polyparaphenylene benzobisoxazole fiber (hereinafter referred to as "PBO fiber"), carbon fiber, glass fiber, silicon carbide fiber, PBT fiber, polyamideimide fiber. , Polyimide fibers, polyarylate fibers, polyazomethine fibers and the like. The high-strength fibers contained in the fiber-containing resin molded product 2 may be only one type, or may be two or more types. The high-strength fiber is preferably at least one kind selected from aramid fiber, PBO fiber, carbon fiber and glass fiber, and particularly preferably aramid fiber and PBO fiber.

The high-strength fiber is usually a solid body, and its length (fiber length) and outer diameter (fiber diameter) are not particularly limited. The upper limit of the fiber length is preferably 150 mm. The average value of the fiber length is preferably 10 mm to 100 mm, more preferably 30 mm to 80 mm. Moreover, the upper limit of the fiber diameter is preferably 1000 μm. The average fiber diameter is preferably 3 μm to 500 μm, more preferably 3 μm to 100 μm.

The high-strength fiber may be in the form of any of a fiber-like single fiber, a filament-like fiber bundle, and a tow-like twisted fiber. The shape of the high-strength fiber is not particularly limited. The shape in the length direction may be a linear shape, a broken line shape, a curved shape, a spiral shape, or a modified shape thereof. The outer shape of the cross section can be a circle, an ellipse, a polygon, or a modified shape thereof.

The content ratio (content ratio) of the high-strength fiber in the fiber-containing resin molded body 2 is 2 to 20% by mass. When the content of the high-strength fiber is within such a range, impact energy can be efficiently absorbed. Since the high-strength fiber is extremely expensive as compared with a general thermoplastic resin or the like, the content of the high-strength fiber in the above range is also advantageous from the viewpoint of manufacturing cost and the like.

When the high-strength fiber is an aramid fiber, the content ratio of the high-strength fiber in the fiber-containing resin molded body 2 is preferably 5 to 20% by mass.

When the high-strength fiber is PBO fiber, the content ratio of the high-strength fiber in the fiber-containing resin molded body 2 is preferably 2 to 20% by mass.

The high-strength fiber has a larger elastic modulus than the vegetable fiber (for example, the aramid fiber has an elastic modulus about twice as large as that of the kenaf fiber).

The fiber-containing resin molded product 2 can further contain other components in addition to the thermoplastic resin, the plant fiber and the high-strength fiber. Examples of other components include additives and balloons that are conventionally used in known thermoplastic resin molded products.

The thickness of the fiber-containing resin molded product 2 is not particularly limited as long as the object of the present invention is not impaired, but is, for example, 1.5 mm or more, preferably 2.0 mm or more, and 4.0 mm or less, preferably 3. It is 5 mm or less.

The method for producing the fiber-containing resin molded product 2 is not particularly limited, but for example, a thermoplastic resin molded product (for example, pellets, fibrous materials, etc.), plant fibers, and high-strength fibers are mixed (mixed). A method of subjecting the fiber assembly obtained by the fiber to a known molding step can be mentioned.

The molded body of the thermoplastic resin is preferably a thermoplastic fiber, and its shape may be linear, curved, spiral, or the like. The fiber length of the thermoplastic resin fiber is preferably 30 mm or more, more preferably 30 mm to 100 mm, further preferably 30 mm to 70 mm. When the fiber length is 30 mm or more, it is easy to obtain sufficient entanglement between the thermoplastic resin fibers and sufficient entanglement between the thermoplastic resin fibers and the plant fibers. Therefore, the fiber-containing resin molded product 2 in which the plant fiber and the high-strength fiber are uniformly dispersed can be efficiently manufactured by the subsequent molding step.

The fiber diameter of the thermoplastic resin fiber is not particularly limited, but is preferably 5 μm to 100 μm, more preferably 20 μm to 100 μm, and further preferably 30 μm to 100 μm. The plant fiber and high-strength fiber used for forming the above-mentioned fiber assembly are as described above.

The respective amounts of the thermoplastic resin fiber, the plant fiber and the high-strength fiber used when producing the fiber-containing resin molded body 2 are the respective content ratios of the thermoplastic resin fiber, the plant fiber and the high-strength fiber in the fiber-containing resin molded body 2. The (content rate) is appropriately set so as to be the above-mentioned values.

Moreover, when forming the said fiber assembly, the air lay method, the card method, etc. can be applied, and you may entangle after that as needed.

The obtained fiber assembly is heated and compressed by a hot plate press to be molded into a mat, and then the obtained mat is cooled and pressed to obtain a plate-shaped fiber-containing resin molded product 2. In the hot plate press, the fiber assembly is heated at a temperature at which the thermoplastic resin fibers are melted and at a temperature at which the high-strength fibers and the plant fibers are not melted. Then, the obtained plate-shaped fiber-containing resin molded body 2 is heated by a hot plate press under a temperature condition in which an internal thermoplastic resin (fiber) is melted, and thereafter, the heated fiber-containing resin molded body, The fiber-containing resin molded body is molded into the shape of the vehicle interior material (door trim) 1 by pressing using a predetermined molding die.

The door trim 1 formed of the fiber-containing resin molded body 2 is lightweight and has excellent rigidity and excellent impact resistance. Since a predetermined amount of high-strength fibers and the like are uniformly dispersed in the fiber-containing resin molded body 2, the fiber-containing resin molded body 2 has isotropic impact absorbability. When such a door trim 1 receives an impact, the impact energy is effectively absorbed by the door trim 1. It is presumed that impact energy is efficiently converted into friction energy between the thermoplastic resin and the plant fiber, and the remaining impact energy is received and absorbed by the high-strength fiber or the like. .. As a result, the door trim 1 made of the fiber-containing resin molded body 2 is suppressed from being broken (cracked) when it receives an impact.

As shown in FIG. 1, the door trim 1 is arranged in a standing state on the side of a user 7 who is seated in a seat in a vehicle. The waist 7a, the abdomen 7b, and the chest 7c of the user 7 overlap the door trim 1 in such a state in the vehicle width direction (the lateral direction of the vehicle). In particular, in the case of the present embodiment, the door trim 1 (fiber-containing resin molded body 2) in which the occurrence of breakage (cracking) is suppressed is reliably arranged at a position overlapping the waist 7a. The symbol X in FIG. 1 represents the central position of the waist 7a of the seated user 7. The waist portion 7a of the user 7 can be said to be a portion that easily comes into contact with the door trim 1 at the time of a side collision or the like.

If the door trim 1 is cracked at the time of a side collision or the like, the user 7 may come into contact with the cracked portion (cut surface or the like). However, as described above, since the door trim 1 of the present embodiment is constituted by the fiber-containing resin molded body 2, the occurrence of breakage (cracking) is effectively suppressed. Therefore, the user 7 can be protected even if another layer such as a skin material is not formed on the surface of the door trim 1.

<Embodiment 2>
Next, the vehicle interior material 1A according to the second embodiment will be described with reference to FIG. FIG. 3 is a front view of the vehicle interior material 1A according to the second embodiment. The vehicle interior material 1A of the present embodiment is also the door trim 1A, as in the first embodiment. The door trim 1A of this embodiment is formed by combining two plate-shaped members. One member is a lower board 10A arranged on the lower side of the vehicle, and the other member is an upper board 11A arranged on the upper side of the vehicle. Among the door trims 1A of the present embodiment, only the lower board 10A is formed of the fiber-containing resin molded body 2A similar to that of the first embodiment.

The upper board 11A is made of, for example, a known fiber-containing resin molding containing a polyolefin resin and kenaf fiber. As shown in FIG. 3, the armrest portion 3A and the inside handle 4A are provided on the upper board 11A, and the speaker grill 5A and the door pocket 6A are provided on the lower board 10A.

As shown in FIG. 3, the lower board 10A is a portion that overlaps with the center position X of the waist of the seated user. As described above, the fiber-containing resin molded body 2A containing the thermoplastic resin, the plant fiber, and the high-strength fiber may be used only in a part (lower board 10A) of the door trim 1A. Such a vehicle interior material (door trim) 1A also effectively absorbs impact energy when a shock is applied, and suppresses breakage (cracking).

<Embodiment 3>
Next, the vehicle interior material 1B of the third embodiment will be described with reference to FIG. FIG. 4 is a front view of the vehicle interior material 1B of the third embodiment. The vehicle interior material 1B of the present embodiment is also the door trim 1B as in the first embodiment. Similarly to the second embodiment, the door trim 1B of the present embodiment is also composed of a combination of two plate-shaped members. However, in the case of the present embodiment, the direction in which the two members are combined is not the vertical direction of the vehicle but the front-back direction. One member is a front board 12B arranged on the front side of the vehicle, and the other member is a rear board 13B arranged on the rear side of the vehicle. Of the door trims 1B of the present embodiment, only the rear board 13B is formed of the fiber-containing resin molded body 2B similar to that of the first embodiment.

The front board 12B is made of, for example, a known fiber-containing resin molded body, like the upper board 11A of the second embodiment. As shown in FIG. 4, the length of the front board 12B in the vehicle front-rear direction is set to gradually increase from the upper side to the lower side. On the other hand, the rear board 13B is set such that the length in the vehicle front-rear direction, on the contrary, gradually decreases from the upper side to the lower side. That is, the door trim 1B has a shape in which the boundary portion (boundary line) between the front board 12B and the rear board 13B is inclined from the front side to the rear side. In such a door trim 1B, the armrest portion 3B is provided so as to extend from the front board 12B to the rear board 13B. Further, the inside handle 4B, the speaker grill 5B, and the door pocket 6B are provided on the front board 12B, respectively.

As shown in FIG. 4, the lower portion of the rear board 13B is set so as to overlap the center position X of the waist of the seated user. Further, the rear board 13B of this embodiment is set so as to overlap the abdomen and chest of the seated user. In this way, the fiber-containing resin molded body 2B containing the thermoplastic resin, the plant fiber, and the high-strength fiber may be used only in a part of the door trim 1B (rear board 13B). Such a vehicle interior material (door trim) 1B also effectively absorbs impact energy when receiving an impact, and suppresses breakage (cracking).

Hereinafter, the present invention will be described in more detail based on examples. The present invention is not limited to these examples.

[Example 1]
Kenaf fibers having an average diameter of 0.05 mm and a fiber length of 70 mm were prepared as plant fibers. As the high-strength fiber, a para-aramid fiber “Toaron” (trade name) (high-strength fiber A) manufactured by Teijin Limited having a fineness of 1.7 dtex and a fiber length of 50 mm was prepared. The tensile modulus of elasticity of the high-strength fiber A (in accordance with JIS L 1013) is 70 GPa. As the thermoplastic resin fiber, a polypropylene fiber A having a fineness of 6.6 dtex and a fiber length of 51 mm, which was obtained by melt spinning a polypropylene resin "Novatech SA01" (trade name) manufactured by Japan Polypro Co., Ltd., was prepared.

40 parts by mass of kenaf fiber, 10 parts by mass of high-strength fiber A, and 50 parts by mass of polypropylene fiber A were laminated by a card machine to produce a fiber assembly. The obtained fiber assembly was heated and compressed by a hot plate press set at 235° C. to obtain a mat having a thickness of about 3 mm. Then, the obtained mat was cooled and pressed for 60 seconds to bring the temperature to 25° C. to obtain a plate-shaped fiber-containing resin molded product having a thickness of 2.5 mm (weight per unit area: 1.5 kg/m ² ). ..

Then, the plate-shaped fiber-containing resin molded product is heated to an internal temperature of 190° C. by using a hot plate press set to 235° C. to melt polypropylene (fiber), and then the fiber-containing resin is formed. The molded body 2 was pressed into a door trim shape by using a predetermined molding die. Thus, the door trim of Example 1 made of the fiber-containing resin molded product was produced.

[Example 2]
95% by mass of the above polypropylene resin as a thermoplastic resin fiber and 5% by mass of maleic anhydride-modified polypropylene resin “MODIC P908” (trade name) manufactured by Mitsubishi Chemical Co., Ltd. were dry-blended, and then obtained by melt spinning. A polypropylene fiber B having a fineness of 6.6 dtex and a fiber length of 51 mm was prepared.

Example 2 was repeated in the same manner as in Example 1 except that 50 parts by mass of polypropylene fiber B (47.5 parts by mass of polypropylene, 2.5 parts by mass of acid-modified polypropylene) was used instead of the polypropylene fiber A. A door trim was made.

[Example 3]
As the high-strength fiber, Toyobo PBO fiber “Zylon” (trade name) (high-strength fiber B) having a fineness of 1.7 dtex and a fiber length of 50 mm was prepared. The tensile modulus of elasticity of the high-strength fiber B (according to JIS L 1013) is 180 GPa.

A door trim of Example 3 was produced in the same manner as in Example 1 except that the amount of kenaf fiber was changed to 49 parts by mass and 2 parts by mass of high-strength fiber B was used as the high-strength fiber. ..

[Example 4]
A door trim of Example 4 was produced in the same manner as in Example 1 except that the amount of kenaf fiber was changed to 45 parts by mass and the amount of high-strength fiber B was changed to 5 parts by mass.

[Comparative Example 1]
A door trim of Comparative Example 1 was produced in the same manner as in Example 1 except that the amount of kenaf fiber was changed to 50 parts by mass and no high-strength fiber was added.

[Comparative Example 2]
A door trim of Comparative Example 2 was produced in the same manner as in Example 2 except that the amount of kenaf fiber was changed to 50 parts by mass and no high-strength fiber was added.

[Comparative Example 3]
A door trim of Comparative Example 3 was produced in the same manner as in Example 3 except that the amount of kenaf fiber was changed to 49 parts by mass and the amount of high-strength fiber B was changed to 1 part by mass.

[Comparative Example 4]
A door trim of Comparative Example 4 was prepared in the same manner as in Example 1 except that the amount of kenaf fiber was changed to 48.5 parts by mass and the amount of high-strength fiber A was changed to 1.5 parts by mass. It was made.

[Example 5]
A door trim of Example 5 was produced in the same manner as in Example 1 except that the amount of kenaf fiber was changed to 45 parts by mass and the amount of high-strength fiber A was changed to 5 parts by mass.

[Example 6]
A door trim of Example 6 was produced in the same manner as in Example 1 except that the amount of kenaf fiber was changed to 30 parts by mass and the amount of high-strength fiber A was changed to 20 parts by mass.

[Comparative Example 5]
A door trim of Comparative Example 5 was produced in the same manner as in Example 1 except that the content of the kenaf fiber was changed to 25 parts by mass and the content of the high-strength fiber A was changed to 25 parts by mass.

[Example 7]
A door trim of Example 7 was produced in the same manner as in Example 3 except that the amount of kenaf fiber was changed to 40 parts by mass and the amount of high-strength fiber B was changed to 10 parts by mass.

[Example 8]
A door trim of Example 8 was produced in the same manner as in Example 3 except that the amount of kenaf fiber was changed to 30 parts by mass and the amount of high-strength fiber B was changed to 20 parts by mass.

[Comparative Example 6]
A door trim of Comparative Example 6 was produced in the same manner as in Example 3 except that the amount of kenaf fiber was changed to 25 parts by mass and the amount of high-strength fiber B was changed to 25 parts by mass.

[Evaluation of impact resistance]
A side impact test is being conducted by the Japan Automobile Accident Control Agency (JNCAP) as part of a vehicle assessment. In this side collision test, a dummy imitating an adult male called "Euro SID-2" (height about 170 cm, weight about 72 kg) was prepared, and the dummy was placed in the driver's seat of a stationary test vehicle. , A truck with a mass of 950 kg is made to collide with the side of the test vehicle at a speed of 55 km/h from the driver's side. Then, in the side collision test, the occupant protection performance is evaluated based on the impact received on the dummy's head, chest, abdomen, and waist. The present inventor carried out a single item test equivalent to such a side impact test, and visually observed the occurrence of fracture behavior in the door trim of each example and each comparative example. The results are shown in Table 1.

As shown in Table 1, it was confirmed that the door trims of Examples 1 to 8 were able to absorb impact without cracking or cracking.

Comparative Examples 1 and 2 were cases in which high-strength fibers were not included, and both resulted in cracking.

Comparative Example 3 is a case where the PBO fiber is contained as the high-strength fiber, but the amount thereof is too small. Comparative Example 4 is a case in which the aramid fiber is contained as the high-strength fiber, but the amount thereof is too small. In Comparative Examples 3 and 4, the door trim was not completely divided, but many cracks were found in the door trim.

Comparative Example 5 is a case where the aramid fiber is contained as the high-strength fiber, but the amount is too large. Further, Comparative Example 6 is a case in which the PBO fiber is contained as the high-strength fiber, but the amount thereof is too small. In Comparative Examples 5 and 6, although the door trim was not cracked, a large force was applied to the dummy (corresponding to the dummy in the side collision test) arranged on the design surface side (vehicle interior side) of the door trim. It is speculated that this is because the door trims of Comparative Examples 5 and 6 could not efficiently absorb the impact energy, and the action time of the force that the dummy receives from the door trim was shortened.

<Other Embodiments>
The present invention is not limited to the embodiments described by the above description and drawings, and the following embodiments are also included in the technical scope of the present invention.

Although the vehicle interior material of the above-mentioned embodiment was a door trim, in other embodiments, it may be another vehicle interior material required to suppress the occurrence of breakage (cracking). Examples of such vehicle interior materials include door base materials, package trays, pillar garnishes, switch bases, quarter panels, armrest core materials, seat structure materials, console boxes, dashboards, various instrument panels, and deck trims. , Bumpers, spoilers, cowlings, etc.

In another embodiment, other layers (skin layer, base material layer, etc.) may be laminated on the design surface side or the back surface side of the fiber-containing resin molded body that constitutes the vehicle interior material, if necessary. ..

1, 1A, 1B... Vehicle interior material (door trim), 2, 2A, 2B... Fiber-containing resin molding

Claims (5)

An interior material for a vehicle, comprising a fiber-containing resin molding containing a thermoplastic resin, a plant fiber and a high-strength fiber, and the content of the high-strength fiber is 2 to 20% by mass. The vehicle interior material according to claim 1, wherein the content rate of the plant fiber in the fiber-containing resin molded body is 20 to 90% by mass. The vehicle interior material according to claim 1 or 2, wherein the tensile modulus of the high-strength fiber is 27 GPa or more. The high-strength fiber comprises aramid fiber,
The vehicle interior material according to any one of claims 1 to 3, wherein a content of the high-strength fiber in the fiber-containing resin molded product is 5 to 20% by mass. The high-strength fiber comprises polyparaphenylene benzobisoxazole fiber,
The vehicle interior material according to any one of claims 1 to 3, wherein a content of the high-strength fiber in the fiber-containing resin molded product is 2 to 20% by mass.

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