JP3093977B2 - Artificial wood decorative material for automotive exterior - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative member made of synthetic wood, which is attached to the outer surface of an automobile body and is made of extruded synthetic resin or the like.

[0002]

2. Description of the Related Art Conventionally, there are users who find values in an automobile in terms of its peculiarity and gazing ability, and such users have been required to differentiate themselves from other vehicles and to make them unique. I really want it.

On the other hand, in recent years, leisure vehicles called RVs and the like have gained in popularity, and entertainments such as enjoying leisure by driving in natural environments such as forests with such vehicles have become popular. boom.

[0004] Under such a background, there is a demand to apply a wood-like makeup to the outer surface of the body of an automobile so as to satisfy gazing ability and individualization while maintaining harmony with forests and the like. .

[0005] Conventionally, in order to apply a wood-like makeup to the outer surface of the body of an automobile, for example, a method of attaching a decorative film having a wood grain pattern to the outer surface of the body or a method of applying a wood grain to the outer surface of the body. The method of painting is common.

[0006]

However, none of the above-mentioned conventional film sticking methods and coating methods have three-dimensionality, lack the presence of decorative articles, and do not provide a satisfactory image of wood decoration. The problem occurs.

[0007] On the other hand, in addition to the above, as a method of applying a woody makeup, a wood-grained resin plate obtained by printing and attaching a film to a synthetic resin plate having a predetermined thickness is applied to the outer surface of the body. Then, a method of attaching using a double-sided tape or the like is conceivable.

However, the polyvinyl chloride resin plate generally used as the above-mentioned synthetic resin plate cannot obtain sufficient adhesive strength with the double-sided tape due to the effect of the plasticizer contained therein, so that the resin plate can be easily manufactured. Peeled off
There arises a problem that sufficient durability cannot be obtained. In addition, the resin plate is smaller than the metal plate that makes up the automobile body.
Since the expansion and contraction rate is very large, and the resin plate expands and contracts greatly with respect to the body, the problem that the resin plate is easily peeled off and the adhesive strength is further reduced arises from this point.

[0009] If the wood-grained resin plate is fixed to the vehicle body by mechanical fastening means such as tacking, high mounting strength can be obtained. In this case, however, holes formed by tacking are formed in the vehicle body. A troublesome operation such as forming is required, and there arises a problem that the mounting operation cannot be easily adopted as a dealer option or the like. In addition, since a tack hole is formed in the vehicle body, a problem such as a tack hole remaining in the body occurs when the resin plate is removed.

The present invention has been made in view of the above circumstances, and can be easily attached to an automobile body with a high attachment strength without forming a tack hole or the like. An object of the present invention is to provide a decorative member made of artificial wood for automobile exteriors, which can give a sufficient image and has sufficient durability without unintentionally peeling off.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a decorative member made of artificial wood for an automobile exterior, which is attached to an outer surface of an automobile body. A band-shaped decorative member main body made of a resin composition mixed with powder in an amount of 20 to 40% by weight and having a predetermined thickness, laminated on the back surface of the decorative member main body, and capable of bonding to the outer surface of the body of the automobile; The subject matter includes an adhesive layer.

The artificial wood decorative member of the present invention can be easily attached simply by sticking the adhesive layer to an automobile body, and it is not necessary to form a tack hole or the like for fixing the decorative member at the time of attachment. . Furthermore, when the decorative member is attached, the decorative member body is three-dimensionally arranged according to its thickness,
A satisfactory presence is obtained.

Further, since the adhesive of the adhesive layer enters the voids of the wood powder in the decorative member main body, the decorative member main body and the adhesive layer are fixed by the anchor effect in addition to the adhesive effect of the adhesive itself. Is done. In addition, the decorative member main body has a small expansion and contraction ratio, and the amount of expansion and contraction with respect to the vehicle body is reduced, so that a decrease in the adhesive force of the decorative member main body can be effectively prevented.

On the other hand, in the present invention, the base material is made of polyvinyl chloride resin, and the resin composition contains two or more plasticizers.
It is preferable to adopt a configuration in which 0 to 40% by weight is mixed.

Further, in the present invention, it is preferable that the decorative member main body has a configuration in which the thickness is set to 2 to 4 mm.

In the present invention, a thin synthetic resin decorative film having a color different in concentration at least from the decorative member main body and capable of adhering to the outer surface of the body is provided on a side edge of the decorative member main body. It is preferable to adopt a configuration in which the components are continuously provided.

Further, in the present invention, the decorative member main body and the decorative film are integrally formed by two-color extrusion molding, and a pattern is provided on the surface of the decorative film by valley printing. Is even more preferred.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> FIG. 1 is a perspective view showing an automobile (1) to which an artificial wood decorative member (10) according to a first embodiment of the present invention is attached, and FIG. 2 is a decorative member (10).
FIG.

As shown in both figures, the decorative member (10) of this embodiment has a decorative member main body (11) and an adhesive layer (12) laminated on the back surface thereof.

The decorative member main body (11) is formed of an extruded product of a resin composition mixed with wood flour using a soft synthetic resin as a base material.

Here, as the resin constituting the base material, a polyvinyl chloride resin (PVC resin) or a thermoplastic resin composed of an olefin resin such as polypropylene can be suitably used. From the viewpoint of processability and the like, the PVC resin can be more preferably used.

Wood flour must be adjusted to 20 to 40% by weight as a mixing ratio in the resin composition. Preferably, the lower limit is adjusted to 25% by weight or more and the upper limit is adjusted to 35% by weight or less. Is good. That is, if the amount of wood powder mixed is too small, it is difficult to give the decorative member main body (11) a texture similar to that of natural wood, which is not preferable. Conversely, if the amount of the wood powder mixed is too large, it is not preferable because, when molded as the decorative member main body (11), it becomes brittle and easily cracked, causing problems in strength and durability.

Further, the wood flour has a water content of 5% by weight.
The following should be used: That is, if the water content exceeds 5% by weight, the surface of the molded article is roughened, and the quality may be deteriorated.

Further, the wood flour generally has a particle size of 80 to 300 mesh.

In the present invention, the base material is P
When using a VC resin, the content of the plasticizer in the resin composition is preferably adjusted to 20 to 40% by weight.
More preferably, the lower limit is 25% by weight or more and the upper limit is 35% by weight.
It is good to adjust to less than weight%. That is, if the content of the plasticizer is too small, the molded article (the decorative member main body) becomes too hard, and it becomes difficult to accurately align the decorative member (10) with the outer surface of the automobile body (2). Failure may occur. Conversely, if the content of the plasticizer is too large, the molded product becomes too soft, and there is a possibility that problems such as a failure to maintain a stable form may occur.

In the present invention, the decorative member main body (11)
Is obtained by mixing wood flour into the above-mentioned base material, and further mixing and mixing a plasticizer and other additives as necessary, to obtain a molding material for a decorative member main body, and extruding this molding material. It is obtained by thermoforming into a belt shape by molding.

As a method which can be legally applied to the above-mentioned extrusion molding method, there are known extrusion molding methods, for example, Japanese Patent Publication No. 3-59803.
The method disclosed in Japanese Patent Application Laid-Open Publication No. H10-209,837 can be suitably used.

The decorative member body (11) to be molded is
Its thickness is 2 to 4 mm, preferably the lower limit is 2.5 mm
As described above, the upper limit is preferably set to 3.5 mm or less. That is, if the thickness of the decorative member main body (11) is too thin, when it is mounted on the vehicle body (2), there is a possibility that it has no three-dimensionality, lacks presence, and cannot obtain an image of wood decoration.
On the other hand, if the thickness is too large, the weight increases, and the weight may be peeled off when the vehicle body is mounted.

Further, in consideration of the dimensional balance with the automobile, the width of the decorative member main body (11) is preferably set to 3 to 10 cm, preferably, the lower limit is 5 cm or more, and the upper limit is 8 cm or less.

When the decorative member body (11) is subjected to a coloring treatment, a master batch in which a coloring agent such as a pigment is mixed is prepared in advance, and a mixture of the master batch and the molding material is prepared. In general, a master batch system formed by extrusion molding is employed. However, it is also possible to directly mix a coloring agent into the molding material.

The decorative member main body (11) may be formed as a synthetic resin foamed product by previously mixing a foaming agent into a resin composition constituting the same. Further, a fragrance having a wood scent may be mixed into the resin composition to impart a wood scent to the decorative member main body (11).

On the other hand, as the adhesive layer (12) laminated on the back surface of the decorative member main body (11), a layer made of a double-sided tape can be used. As the double-sided tape, a tape in which an acrylic adhesive is applied to both surfaces of an acrylic foam base material can be suitably used. In the present invention, any adhesive layer (12) may be used as long as it can adhere to the outer surface of the body of the automobile (1).

The decorative member (10) of the present embodiment is configured as described above. For example, as shown in FIG. 1, the side of the adhesive layer (12) is attached to the surface of the body of the automobile (1). It is to be attached by doing.

According to the decorative member (10) of the present embodiment,
Since the decorative member body (11) is made of an extruded product of the resin composition mixed with wood flour, a pattern similar to natural wood,
Since the texture can be obtained, it is possible to give a decoration full of natural wood feeling when attached to the car body (2). Further, the decorative member main body (11) has a presence due to its thickness, and can provide a sufficiently decorative image of wood.

Further, the decorative member (10) of this embodiment can be easily attached simply by sticking the adhesive layer (12) to the automobile body (2), and can be adopted without any trouble as a dealer option or the like. Can be. In addition, since the vehicle body (2) does not need to form a tack hole or the like for fixing a decorative member because the adhesive member (12) is used to attach the decorative member (10), the tack hole is formed when the decorative member (10) is removed. There is no problem such as remaining.

Further, since the adhesive of the adhesive layer (12) enters the void portion of the wood flour in the decorative member main body (11),
In addition to the adhesive effect of the adhesive itself, the adhesive layer (12) is fixed to the decorative member main body (11) by the anchor effect. For this reason, a high adhesive strength (attachment strength) is obtained for the decorative member main body (11), and a stable adhesive state can be maintained for a long time, and sufficient durability can be obtained.

Further, the decorative member main body (11) has a very small expansion and contraction ratio as compared with a PVC resin molded product or the like which is usually used as a side molding for an automobile, and is made of a metal plate constituting the automobile body (2). The difference in the expansion and contraction ratio of For this reason, the amount of expansion and contraction of the decorative member main body (11) with respect to the automobile body (2) is reduced, and from this point, peeling of the decorative member main body (11) can be effectively prevented, and the durability can be further improved. it can.

For reference, the linear expansion coefficient of a PVC resin molded product usually used as an automobile side molding is 6%.
７7 × 10 ⁻⁵ / ° C., and the decorative member (1
The wood powder-containing PVC resin molded product constituting 0) is 4 to 5 ×
10 ⁻⁵ / ° C. Further, the wood flour and PVC resin molded article containing a foaming agent related to the present invention have a temperature of 3 to 4 × 10 ⁻⁵ / ° C.

<Second Embodiment> FIG. 3A shows an artificial wood decorative member (2) according to a second embodiment of the present invention.
0) is a front view, and FIG. 3B is a sectional view thereof.

As shown in both figures, the decorative member (20) in the second embodiment has a decorative member body (11) (11) similar to that of the first embodiment and a decorative member body (11) on the back surface. And a thin decorative film (13) arranged so as to connect between the decorative member main bodies (11) and (11) in the same plane as the back surface of the decorative member.

The decorative film (13) is composed of an extruded product of the same resin composition as the decorative member main body (11), and has a color different from the decorative member main body (11) at least in concentration. In addition, a pattern such as wood grain is printed on the surface by valley printing (valley printing).

The decorative film (13) and the decorative member main body (11) are formed simultaneously by, for example, two-color extrusion, and are integrated with each other.

An adhesive layer (12) made of a double-sided tape or the like is laminated on the back surfaces of the decorative member main body (11) and the decorative film (13), as in the first embodiment.

The other structure is the same as that of the first embodiment.

The decorative member (20) having the above structure is attached to an automobile by attaching the adhesive layer (12) to the automobile body (2).

In the decorative member (20), a three-dimensional image of wood decoration can be given by the decorative member body (11), and the body (2) is further covered with the decorative film (13). Thus, the body (2) itself can be provided with a wooden feeling different from that of the decorative member main body (11).

Further, since the decorative film (13) can be formed simultaneously with the decorative member main body (11) by two-color extrusion molding, it is not necessary to separately form the decorative film (13). 13) can be easily formed.

[0048]

As described above, according to the artificial wood decorative member for automobile exterior of the present invention, a decorative member body having a predetermined thickness made of a resin composition containing wood flour, and an adhesive layer on the back surface thereof are formed. Therefore, when attached to an automobile body, the decorative member body having a woody feeling is three-dimensionally arranged according to its thickness, and can give a sufficient image of wood decoration. In addition, the decorative member body can be easily attached simply by sticking the adhesive layer to the vehicle body, and it is not necessary to form a tack hole or the like for fixing the decorative member on the vehicle body, and the tack hole remains. Can be prevented. Further, since the adhesive of the adhesive layer enters the void portion of the wood flour in the decorative member main body, in addition to the adhesive effect of the adhesive itself, the adhesive layer is fixed to the decorative member main body by the anchor effect. Adhesive strength can be obtained, and furthermore, since the decorative member main body has a small expansion and contraction ratio, the amount of expansion and contraction with respect to the automobile body is reduced, and from this point also, high adhesive strength can be obtained. Therefore, there is an effect that unintended peeling of the decorative member main body can be reliably prevented, and sufficient durability can be obtained.

Further, in the present invention, when specifying the compounding components, specifying the component ratio, or specifying the thickness of the decorative member, there is an advantage that the above-mentioned effects can be obtained more reliably.

In the present invention, when decorative films having different color densities are continuously provided on the side edges of the decorative member main body,
There is an advantage that the decorative member main body portion can give an image of wood decoration, and the decorative body film portion can give the automobile body itself a different woody feeling from the decorative member main body.

Further, when the decorative member main body and the decorative film are formed by two-color extrusion molding, and a pattern is applied to the surface of the decorative film by valley printing,
There is an advantage that a decorative film can be easily formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an automobile to which an artificial wood decorative member according to a first embodiment of the present invention is attached.

FIG. 2 is a cross-sectional view illustrating a decorative member according to the first embodiment.

FIG. 3 (a) is a front view showing an artificial wood decorative member according to a second embodiment of the present invention, and FIG. 3 (b) is a sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Automobile 2 ... Body 10, 20 ... Decorative member 11 ... Decorative member main body 12 ... Adhesive layer 13 ... Decorative film

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-273903 (JP, A) JP-A-61-163837 (JP, A) JP-A-60-222250 (JP, A) JP-A 60-222 219051 (JP, A) JP-A-60-219049 (JP, A) JP-A-62-108050 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60R 13/00-13 / 10 B32B 1/00-35/00

Claims (5)

(57) [Claims] An artificial wood decorative member for an exterior of an automobile attached to an outer surface of a body of an automobile, comprising a resin composition containing a soft synthetic resin as a base material and 20 to 40% by weight of wood powder mixed therein. And a band-shaped decorative member main body having a predetermined thickness, and an adhesive layer laminated on the back surface of the decorative member main body and capable of adhering to an outer surface of the vehicle body, for an automobile exterior. Artificial wood decorative parts. 2. The artificial wood decorative member according to claim 1, wherein the base material is made of polyvinyl chloride resin, and a plasticizer is mixed in the resin composition in an amount of 20 to 40% by weight. 3. The decorative member main body has a thickness of 2 to 4 mm.
The artificial wood decorative member for automobile exterior according to claim 1 or 2, wherein the decorative member is set to: 4. A thin synthetic resin decorative film having a color at least different in density with respect to the decorative member main body and capable of adhering to the outer surface of the body is provided continuously on a side edge of the decorative member main body. An artificial wood decorative member for exterior of an automobile according to any one of claims 1 to 3. 5. The automotive exterior according to claim 4, wherein the decorative member main body and the decorative film are integrally formed by two-color extrusion molding, and a pattern is provided on the surface of the decorative film by valley printing. Made of artificial wood.