JP4233722B2 - Vehicle mall - Google Patents

Description

【００３１】
【発明の効果】
以上説明したように、請求項１の発明によれば、モールの全ての部分に塩化ビニル樹脂を用いなくて済み、適宜用いられる金属製芯材部分を除いて全てオレフィン系樹脂で構成したため、リサイクル性及び自然環境保護の点で優れ、しかも塗装によることなく材着によって優れた発色性を得ることができるため、作業効率が良く、加えて塗料の飛散による作業環境の悪化や塗料の無駄を生じることがなく、作業環境及び製品コストの点で優れる効果がある。特に、請求項１の発明のモールは透明な外層が、材着からなる基層表面を保護するのみならず、基層の色を強調するレンズ効果の作用を発揮し、基層の色を鮮明にする効果がある。さらに、モールは各部の接着一体性に優れるのみならず、曲面への形状追従性も良好で溝への取付後に浮き上がりや外れのおそれがない。
【００３２】
それに加えて、請求項２のようなＨＡＺＥ値を有する樹脂で意匠部の外層及び基層を構成すれば、基層の発色がより鮮明になり、装飾性が向上する。
【００３３】
さらに、請求項３のように光輝材を平均粒径１５０μｍ以下とすれば、粒々感が無くなり、より装飾性が向上する。
【００３４】
また、請求項４の発明によれば、請求項１の発明と同様に、リサイクル性、自然環境保護、作業効率、作業環境、製品コスト、曲面への追従性等に優れるモールが得られる。特に、請求項４の発明のモールは、外層が材着されているため、材着の色が直接目に触れ、材着による装飾効果が高くなる。
【００３５】
また、請求項５のようなＨＡＺＥ値を有する樹脂で意匠部の外層を構成すれば、外層の発色がより鮮明になり、装飾性が向上する。
【００３６】
さらに請求項６のように光輝材の粒径を平均粒径１５０μｍ以下とすれば、外層表面の滑らか感が向上し、外層表面の美観がより向上する。
【００３７】
また、請求項７のような硬度及び曲げ弾性率を有するポリオレフィン系熱可塑性エラストマーで胴部を構成すれば、モールの曲面への追従性が確実になり、モールの取付性が向上する。
【００３８】
さらに請求項８のようなテーパー摩耗試験値を有する金属架橋タイプのオレフィン系熱可塑性エラストマーで外層を構成すれば、意匠部表面の耐傷付性が高くなり、モールが車体の洗車等によっても傷付き難くなり、良好な美観を長期に渡って維持できる。
【００３９】
さらに請求項９の発明のように、エチレン−αオレフィン共重合体が、αオレフィン部としてプロピレン、１−ブテン、１−ヘキサン、１−オクテンのいずれかを有する１種または２種以上の混合物からなるものとすれば、樹脂の入手し易さや価格、及び成形性の点で有利である。
【００４０】
さらに請求項１０のように、意匠部、胴部及びリップ部が共押出成形により一体形成されたものとすれば、成形作業が簡略になる。しかも、モール各部の接着一体性に優れるため、共押出成形後に各部が剥離するおそれもない。
【図面の簡単な説明】
【図１】本発明の第１のタイプの実施例に係る車両用モールの断面図である。
【図２】本発明の第２のタイプの実施例に係る車両用モールの断面図である。
【図３】従来のモールの取付状態を示す断面図である。
【符号の説明】
１０，１０Ａ モール
１１，１１Ａ 意匠部
１２，１２Ａ 外層
１３，１３Ａ 基層
１５，１５Ａ 胴部
１７，１７Ａ リップ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular molding.
[0002]
[Prior art]
Conventionally, a mall is mounted on a vehicle for decoration or the like. As shown in FIG. 3, the molding includes a design portion 51, a body portion 52 formed on the back side of the design portion 51, and a lip portion 53 formed to project from the side surface of the body portion 52. There is something. In this type of molding 50, a body portion 52 and a lip portion 53 are fitted into a groove 61 provided in a roof 60 or the like of a vehicle body, and a design portion 51 closes the groove 61 and is disposed on the surface of the vehicle body or the like. The width of the groove 61 is narrower than the distance between the tips of the lip parts 53, and the lip part 53 inserted into the groove 61 presses the side wall in the groove 61 by elastic restoring force, so that the molding 50 61 is fixed. Reference numeral 54 denotes a metal core made of stainless steel or the like.
[0003]
The molding 50 is usually formed in a straight line by extrusion and cut into a predetermined length, and is fitted into the groove 61 to have a shape along a curved surface of a vehicle body or the like. Therefore, the molding 50 is required to have a predetermined flexibility, and if the rigidity is too high, it is difficult to insert the molding into the groove, and it is easy to come off even if it is once inserted. For this reason, conventional moldings are often composed of soft vinyl chloride resin.
[0004]
Moreover, it is preferable from the point of the decorative improvement that the surface of the said design part 51 is made into the color according to a mounting part. For this reason, the design portion 51 is painted in a desired color. Moreover, the vinyl chloride resin constituting the molding is suitable for painting because of its good adhesion to the coating film. However, coloring by painting has problems such as troublesome painting work, waste due to scattering of paint, increase in product cost due to them, and deterioration of working environment due to scattering of organic solvent contained in the paint.
[0005]
Therefore, as a coloring method that replaces the coating, a so-called “material deposition” is proposed in which a coloring resin containing a coloring material or a bright material in a synthetic resin is used as a molding resin material. According to this material attachment, a molding having a desired color can be obtained simply by performing plastic molding such as extrusion molding using the material attachment resin, so that it is possible to improve work efficiency, reduce costs, and improve the work environment. In addition, since the vinyl chloride resin is excellent in transparency and has good color development due to material wearing, a material wearing molding having a desired color excellent in decorativeness can be obtained. In addition, since the vinyl chloride resin has good scratch resistance, the surface of the design part of the molding is hardly damaged even if no coating film is present.
[0006]
On the other hand, it is difficult to say that the vinyl chloride resin has sufficient weather resistance. Especially in the case of wearing materials, the surface of the design portion made of vinyl chloride resin is exposed without being covered with the coating film. The surface of the part is easily yellowed. In particular, when the color of the material is light, yellowing is conspicuous and there is a problem that the aesthetic appearance of the surface of the design part is impaired. Furthermore, from the viewpoint of environmental problems in recent years, there has been a demand for moldings made of olefin resins instead of vinyl chloride resins.
[0007]
[Problems to be solved by the invention]
However, since a thermoplastic polyolefin elastomer (TPO) generally used as an olefin resin instead of the vinyl chloride resin is inferior in scratch resistance, the surface of the molding is damaged when used on the design surface of the molding. There is a problem that it is easy to attach and it is easy to damage the beauty. As a method for improving the scratch resistance of the resin, it is conceivable to increase the glass transition temperature of the resin to room temperature or higher or to increase the crystallinity. However, in that case, since the resin becomes too hard, it is difficult to fit the molding made of that resin into the groove by following the mounting surface of the vehicle body or the like. This causes a problem that it is easy to come off the mounting surface.
[0008]
The present invention has been made in view of the above points, and a surface having a good decorative property can be obtained without painting, the followability to a curved surface is good, the manufacturing is easy, and the recycling is possible. An inexpensive vehicular mall is provided.
[0009]
[Means for Solving the Problems]
The invention of the vehicle molding proposed here is divided into two according to the structure of the design portion. The first type is a vehicular molding comprising a design part, a body part formed on the back side of the design part, and a lip part protruding from a side surface of the body part, as described in claim 1. The design part is a transparent outer layer made of a metal-crosslinking type olefin-based thermoplastic elastomer and a synthetic resin mainly composed of an ethylene-α-olefin copolymer, and either or both of a coloring material and a glittering material are mixed. It has a laminated structure with a base layer formed from a resin material, and the body and the lip are made of a polyolefin-based thermoplastic elastomer.
[0010]
The second type is a vehicular molding comprising a design part, a body part formed on the back side of the design part, and a lip part protrudingly formed on a side surface of the body part. And the design part is composed of an outer layer made of a resin material obtained by mixing one or both of a coloring material and a glittering material with a metal-crosslinking type olefin-based thermoplastic elastomer, and a synthesis mainly composed of an ethylene-α-olefin copolymer. It is a laminated structure with a base layer made of a resin, and the body part and the lip part are made of a polyolefin-based thermoplastic elastomer.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a first type of vehicle molding according to the present invention, and FIG. 2 is a sectional view of a second type of molding for vehicle.
[0012]
First, a first type of vehicle molding 10 will be described. The molding 10 is fitted in the groove 61 of the vehicle body roof or the like in FIG. 3 shown in the section of the prior art, and includes a design part 11, a body part 15, and a lip part 17, and the design part 11 and the lip part. 17 has a shape protruding from both side surfaces of the body portion 15.
[0013]
The design portion 11 is a portion that covers the groove in which the molding 10 is fitted to improve the appearance of the groove portion, and includes a transparent outer layer 12 and a base layer 13 that is attached to the material.
The outer layer 12 is a portion that is laminated on the surface of the base layer 13 to form a smooth design surface of the molding 10, and is made of a transparent resin so that the color of the colored base layer 13 can be seen through from the outside. Further, the outer layer 12 constitutes the outer surface of the molding 10 and is exposed to sunlight, and is also a portion that is easily damaged when the vehicle is washed, etc., and therefore has good weather resistance and scratch resistance. From this point, in the present invention, it is composed of a metal bridge type olefin thermoplastic elastomer.
[0014]
The metal cross-linked olefin-based thermoplastic elastomer constituting the outer layer 12 has a HAZE value (measured value of 1 mm thickness according to JISk-7105) of 10% in order to improve the color transmission of the base layer and improve the color development. The following are preferable, and in order to improve the scratch resistance, the taper wear test value (JIS
K-7204) is preferably 40 mg / 1000 times or less.
[0015]
Furthermore, the outer layer 12 is easy to follow the curved surface of the vehicle body or the like when the molding 10 is fitted in a groove such as a vehicle body of the vehicle, and is difficult to come off due to the rigidity of the molding 10 after fitting in the groove. It is necessary to have an appropriate flexibility, and when the thickness is 0.2 to 1.0 mm, the bending elastic modulus (JIS K-7106) is 400 MPa or less, particularly 100 to 300 MPa. It is preferable to use a plastic elastomer. Examples of commercially available products that can be used as such a metal-crosslinking type olefin-based thermoplastic elastomer include “Surlin” manufactured by DuPont and “High Milan” manufactured by Mitsui DuPont Polychemical. In order to improve the weather resistance, the outer layer 12 may be appropriately subjected to addition or treatment of an additive for improving the weather resistance.
[0016]
The base layer 13 is a part that holds the outer layer 12 and imparts a desired color to the design part 11. Furthermore, in the molding 10, the design part 11 (outer layer 12, base layer 13), body part 15, and lip part 17 are preferably formed integrally by coextrusion from the viewpoint of improving the efficiency of manufacturing operations and improving quality. The base layer 13 is required to have good adhesion (compatibility) to both the outer layer 12 and the body portion 15, and the molding 10 is attached along the surface of the attachment site such as the vehicle body. Followability is required. In order to satisfy these requirements, in the present invention, the base layer 13 is composed of a resin material obtained by mixing either or both of a coloring material and a glittering material with a synthetic resin mainly composed of an ethylene-α-olefin copolymer. .
[0017]
The synthetic resin mainly composed of an ethylene-α-olefin copolymer means that the ethylene-α-olefin copolymer is 100% or the largest proportion relative to other resin components. In this ethylene-α-olefin copolymer, the ethylene component exhibits good adhesion to a metal-crosslinking type olefin thermoplastic elastomer (outer layer 12), and the α-olefin copolymer component corresponds to TPO (body 15). In order to show good adhesiveness, there is no fear of peeling between the outer layer 12, the base layer 13, and the body portion 15 even by the coextrusion molding.
[0018]
The α-olefin in the ethylene-α-olefin copolymer is preferably one having 3 or more carbon atoms, particularly 3 to 8 carbon atoms. Examples include propylene, 1-butene, 1-hexene, 1-heptene, 1 -Octene etc. can be mentioned. The α olefin is not limited to one type, and a plurality of types may be used.
[0019]
Further, the ethylene-α-olefin copolymer constituting the base layer 13 has a flexural modulus (JIS K-7106) of 400 MPa or less, particularly 50 to 300 MPa, in order to make the design part 11 easily follow the curved surface of the vehicle body or the like. In order to improve the color development of the base layer, the HAZE value (measured value of 1 mm thickness according to JIS k-7105) is preferably 15% or less.
[0020]
Examples of commercially available ethylene-α olefin copolymers that can be used in the present invention include “Tuffmer A” series made of a copolymer of ethylene and 1-butene, and a copolymer of ethylene and 1-octene. “Affinity” and “engage” manufactured by Dow Chemical Co., Ltd. can be mentioned.
[0021]
The coloring material and the glittering material are for making the design portion 11 have a required color (including a metallic tone and a mica tone), and either one or both are used depending on the required color tone. A pigment having a required color is generally used as the colorant, and metal powder such as aluminum powder and mica (mica) are suitable as the bright material. In particular, when expressing a color tone such as white pearl mica, mica is used as a glittering material. The particle size of the glittering material depends on the required color tone, but an average particle size of 150 μm or less is particularly preferable in order to make the design portion 11 excellent in a metallic tone atmosphere. The amount of the coloring material and the glittering material is preferably 1 to 3% by weight out of 100% by weight of the resin material, from the viewpoint of good coloring and moldability. However, depending on the color tone, it may be about 8% by weight.
[0022]
The trunk portion 15 is a portion that holds the design portion 11 and the lip portion 17, and is not required to be transparent like the design portion 11. Moreover, the trunk | drum 15 must support the design part 11, and must maintain the shape of the molding 10 in the said groove | channel, and also the softness | flexibility for enabling it to follow the molding 10 along curved surfaces, such as a vehicle body, is calculated | required. It is done. From this point, in this invention, the trunk | drum 15 was comprised with the polyolefin-type thermoplastic elastomer (TPO). Further, this TPO may be a general one that is frequently used in ordinary extrusion molding, and more preferably, has a JISA hardness of 70 or more, preferably 70 from the viewpoint of the shape retention property and the followability to the mounting surface. A material having a bending elastic modulus (JIS K-7106) of 400 MPa or less, particularly 50 to 250 MPa is suitable. In this embodiment, a thin plate-like metal core 16 is embedded in the body portion 15 to prevent the shrinkage of the molding and to reduce the linear expansion coefficient.
[0023]
The lip portion 17 is a portion for fixing the molding 10 to the groove by a restoring force due to elastic deformation, and has flexibility and resilience. In the present invention, the lip portion 17 is made of a polyolefin-based thermoplastic elastomer (TPO). The In particular, the compression set at 70 ° C. for 22 hours in JIS K-6301 is preferably 60% or less, more preferably 40% to 50%. The TPO constituting the lip portion may be the same as that of the body portion 15, but a dynamic cross-linking type is suitable from the viewpoint of appropriate flexibility and good restoration property. For example, “Santoprene” manufactured by AES, “Miralastomer” manufactured by Mitsui Chemicals, and the like can be mentioned.
[0024]
2A includes a design portion 11A, a body portion 15A, and a lip portion 17A, and has the same resin and the same as those of the first type vehicle molding 10 except for the configuration of the design portion 11A. Each part is formed integrally by co-extrusion. 16A is a metal core.
[0025]
The design portion 11A is composed of an outer layer 12A made of a resin material obtained by mixing one or both of a coloring material and a glittering material with the metal-crosslinked olefin-based thermoplastic elastomer, and the ethylene-α-olefin copolymer as a main component. And a laminated structure with a base layer 13A made of synthetic resin. Thus, the second type molding 10A is different from the first type molding 10 in that the outer layer 12A is colored.
[0026]
Since the outer layer 12A has good color development, a metal cross-linked olefin-based thermoplastic elastomer having a transparency with a HAZE value of 10% or less according to JIS K-7105 (1 mm thickness) is suitable. About the scratch resistance and the bending elastic modulus, the same thing as the case of the first type molding 10 is preferable. The amount of either or both of the colorant and the glittering material with respect to 100% by weight of the resin material for forming the outer layer portion 12A is usually 1 to 3% by weight.
[0027]
In the base layer 13A, since the outer layer 12A is coated with a coloring material or a glittering material, it is not necessary to deposit the coloring material or the glittering material. Of course, the base layer 13A may also be made of a resin obtained by appropriately adding either or both of a coloring material and a bright material to the ethylene-α-olefin copolymer. The ethylene-α-olefin copolymer constituting the base layer 13A preferably has a flexural modulus (JIS K-7106) of 400 MPa or less, particularly 50 to 300 MPa. From the copolymer of ethylene and 1-butene, “Tuffmer A” series manufactured by Mitsui Chemicals, Inc., “Affinity” and “Engage” manufactured by Dow Chemical Co., Ltd., which are copolymers of ethylene and 1-octene.
[0028]
The vehicular molding of the present invention is not limited to the one described in the above embodiment, and can be changed as appropriate without departing from the gist of the present invention. For example, the body part and the lip part may be formed in series with the same material, or a fixing part such as a clip for fixing in a groove of a vehicle body may be provided on a part of the body part.
[0029]
【Example】
Table 1 shows the materials, physical properties, adhesive properties, and attachment to grooves formed on curved surfaces of the vehicle molding and the vehicle molding of the comparative example for the first type and second type examples co-extruded. And color development. The bending elastic modulus, the HAZE value, the compression set, and the taper wear test value are in accordance with the above test methods. In addition, the taper abrasion test was performed with a wear wheel: CS-17, a load: 1 kg, a rotation speed: 1000 rotations, and a rotation speed: 60 rpm. In addition, the moldings of the first and second type examples and the comparative example are both in which an iron core material having a thickness of 0.5 mm and a width of 1.7 mm is embedded in the body portion.
[0030]
[Table 1]

[0031]
【The invention's effect】
As described above, according to the invention of claim 1, it is not necessary to use vinyl chloride resin for all parts of the molding, and all of the parts except for the metal core part used as appropriate are made of olefin resin. In terms of safety and protection of the natural environment, and excellent color development can be obtained by wearing materials without painting, work efficiency is improved, and in addition, the working environment is deteriorated and paint is wasted due to paint scattering. And there is an excellent effect in terms of work environment and product cost. In particular, in the molding of the invention of claim 1, the transparent outer layer not only protects the surface of the base layer made of material, but also exhibits the effect of a lens effect that emphasizes the color of the base layer, and the effect of sharpening the color of the base layer There is. Furthermore, the molding not only has excellent adhesion integrity at each part, but also has good shape followability to a curved surface, and there is no fear of lifting or coming off after being attached to the groove.
[0032]
In addition, if the outer layer and the base layer of the design part are made of a resin having a HAZE value as in claim 2, the color of the base layer becomes clearer and the decorativeness is improved.
[0033]
Furthermore, when the glittering material has an average particle diameter of 150 μm or less as in claim 3, the graininess is lost and the decorativeness is further improved.
[0034]
Further, according to the invention of claim 4, as with the invention of claim 1, a molding having excellent recyclability, natural environment protection, work efficiency, work environment, product cost, followability to a curved surface, and the like can be obtained. In particular, since the outer layer of the molding of the invention of claim 4 is coated with the outer layer, the color of the dressing is directly in contact with the eyes, and the decoration effect by the dressing is enhanced.
[0035]
Further, if the outer layer of the design portion is made of a resin having a HAZE value as in claim 5, the color of the outer layer becomes clearer and the decorativeness is improved.
[0036]
Further, when the particle size of the glittering material is set to an average particle size of 150 μm or less as in the sixth aspect, the smoothness of the outer layer surface is improved and the appearance of the outer layer surface is further improved.
[0037]
Further, if the body is formed of a polyolefin-based thermoplastic elastomer having the hardness and the flexural modulus as in claim 7, the followability to the curved surface of the molding is ensured, and the mounting property of the molding is improved.
[0038]
Furthermore, if the outer layer is composed of a metal bridge type olefin thermoplastic elastomer having a taper wear test value as in claim 8, the scratch resistance of the surface of the design portion is increased, and the molding is damaged even when the car body is washed. It becomes difficult and can maintain a good aesthetic for a long time.
[0039]
Further, as in the invention of claim 9, the ethylene-α olefin copolymer is composed of one or a mixture of two or more of propylene, 1-butene, 1-hexane and 1-octene as the α olefin part. If it becomes, it is advantageous in terms of easy availability and price of the resin and moldability.
[0040]
Further, if the design part, the body part and the lip part are integrally formed by coextrusion molding as in claim 10, the molding operation is simplified. And since it is excellent in the adhesive integrity of each part of a molding, there is no possibility that each part will exfoliate after coextrusion molding.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a vehicular molding according to a first type of embodiment of the present invention.
FIG. 2 is a sectional view of a vehicular molding according to a second type of embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a mounting state of a conventional molding.
[Explanation of symbols]
10, 10A Mall 11, 11A Design part 12, 12A Outer layer 13, 13A Base layer 15, 15A Body part 17, 17A Lip part

Claims (10)

In a vehicular molding comprising a design part, a body part formed on the back side of the design part, and a lip part formed to project from the side surface of the body part,
A material in which the design part is a transparent outer layer made of a metal-crosslinking type olefin-based thermoplastic elastomer, and a synthetic resin containing ethylene-α-olefin copolymer as a main component and either or both of a coloring material and a glittering material. It is a laminated structure with a base layer formed from a resin,
A vehicular molding characterized in that the body portion and the lip portion are made of a polyolefin-based thermoplastic elastomer. The cross-linked olefinic thermoplastic elastomer composing the outer layer is JIS K-7105 (thickness 1 mm) and has a HAZE value of 10% or less. 2. The vehicular molding according to claim 1, which has a HAZE value of 15% or less according to K-7105 (thickness 1 mm). The vehicular molding according to claim 1 or 2, wherein the glittering material has an average particle size of 150 µm or less. In a vehicular molding comprising a design part, a body part formed on the back side of the design part, and a lip part formed to project from the side surface of the body part,
Synthetic resin whose main component is an outer layer made of a material resin in which the design part is a metal-crosslinking type olefinic thermoplastic elastomer mixed with one or both of a coloring material and a glittering material, and an ethylene-α-olefin copolymer A vehicular molding characterized in that the body part and the lip part are made of a polyolefin-based thermoplastic elastomer. 5. The vehicular molding according to claim 4, wherein the metal-crosslinked olefinic thermoplastic elastomer constituting the outer layer has a HAZE value of 10% or less in accordance with JIS K-7105 (thickness 1 mm). The vehicular molding according to claim 4 or 5, wherein the glittering material has an average particle diameter of 150 µm or less. The vehicular molding according to any one of claims 1 to 6, wherein the polyolefin-based thermoplastic elastomer of the trunk portion has a JIS hardness of 70 or more and a flexural modulus of 400 MPa or less according to JIS K-7106. The vehicular molding according to any one of claims 1 to 7, wherein the metal-crosslinking type olefin-based thermoplastic elastomer has a taper wear test value of 40 mg / 1000 times or less according to JIS K-7204. The ethylene-α-olefin copolymer is composed of one or a mixture of two or more of propylene, 1-butene, 1-hexane, and 1-octene as an α-olefin part. The vehicle mall according to any one of 8. 10. The vehicular molding according to claim 1, wherein the design portion, the body portion, and the lip portion are integrally formed by coextrusion molding.

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