JPH0726217U - Car mall - Google Patents

Abstract

(57) [Abstract] [Purpose] An automobile molding material composed of an olefin polymer material instead of polyvinyl chloride, which is excellent in flexibility, scratch resistance and surface appearance. [Structure] As illustrated in FIG. 3, at least the molding body has a molding body 7 made of a soft olefin polymer having a JISA hardness of 50 to 80, and a hard olefin having a JISA hardness of 85 or more laminated on the molding body. A skin layer 9 or 10 made of a system polymer, the skin layer 10 having a thickness of 1 to 50 μm at the lip portion of the molding body, and an adhesive olefin polymer skin layer at the bottom of the molding body, if necessary. An automobile molding having a structure in which 11 and 13 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile molding made of an olefin polymer material, which is excellent in flexibility, scratch resistance and surface appearance.

[0002]

[Prior art]

 At present, polyvinyl chloride is exclusively used as a wind molding material for automobiles. However, in recent years, there has been a demand for material conversion from polyvinyl chloride to olefin-based polymers due to demands for weight reduction to improve fuel efficiency, recycling of materials due to environmental problems, and prevention of generation of corrosive gas during incineration. Are becoming available. However, it was not easy for a single olefin polymer to retain the excellent properties of polyvinyl chloride. For example, a thermoplastic polyolefin-based elastomer is known to have flexibility equivalent to that of polyvinyl chloride, but when used as a molding material, it is easily scratched and its gloss is not sufficient. . In addition, since it is difficult to bond with an adhesive, sticking to the car body becomes a bottleneck, or the appearance is impaired by the wax remover (hot water / kerosene mixture) used when removing the rust-preventive wax of the car. Was also a problem. On the other hand, if a hard olefin polymer is selected with an emphasis on the scratch resistance and gloss of the molding, it will not be possible to easily perform the molding process of the molding, and a new problem will be caused that the portion contacting the molding will be damaged. Caused.

[0003]

[Problems to be solved by the device]

 Therefore, the present inventors have studied a molding material that has sufficient flexibility, is easy to mount, and has improved scratch resistance and surface gloss. At the same time, we also investigated a formulation that can improve the adhesiveness with the adhesive and the wax remover resistance. As a result, it has been found that the objective can be achieved by constructing an automobile molding structure that combines materials with the following prescription.

[0004]

[Means for Solving the Problems]

 The present invention comprises a molding body made of a soft olefin polymer having a JISA hardness of 50 to 80 as the molding material of the molding body, and a hard olefin polymer having a JISA hardness of 85 or more laminated on the molding body. The present invention relates to an automobile mould, which is formed of a skin layer and has a thickness of 1 to 50 μm in the lip portion of the molding body.

Next, the present invention will be described in detail with reference to the drawings. 1 and 2 are views showing a cross section of a typical conventional wind molding, FIG. 1 shows a black specification, and FIG. 2 shows an optical specification.

In FIG. 1, 1 is a molding aggregate, which is made of, for example, polyvinyl chloride mixed with carbon black. Reference numeral 3 is a lip portion, which is usually made of a material softer than the aggregate portion, and for example, polyvinyl chloride which is slightly softer than the aggregate portion containing carbon black is used. Reference numeral 2 is an adhesive bonding portion of an aggregate, and 4 is a bonding portion of a lower lip.

The optical specification molding shown in FIG. 2 has a structure in which a metal vapor deposition film 5 is inserted on top of the black specification molding shown in FIG. 1, and a transparent resin skin layer 6 is coated on the surface thereof.

3 and 4 are views showing an example of a wind molding according to the present invention. FIG. 3 is a drawing showing a black specification molding, and the molding main body composed of the upper part 7b of the aggregate 7 and the lip material 8 has a soft olefin type having a JIS A hardness of 50 to 80, preferably 55 to 75 at 23 ° C. It is composed of a polymer. The aggregate part 7 may be made of one kind of material as a whole, but the pillar part 7a and the upper part 7b may be made of different materials. In that case, if the JISA hardness at 23 ° C. of the upper portion 7b of the molding main body is at least 50 to 80, a pillar having a hardness higher than the above-mentioned hardness range may be used. The aggregate part and the lip part may have the same hardness, but it is preferable that the lip part is made of a softer material. In a black specification molding, carbon black is blended in the soft olefin polymer layer for the purpose of imparting weather resistance and coloring.

The skin layer 9 and the skin layer 10 are hard olefin polymers having a JISA hardness of 85 or more, preferably 90 or more, which are formed on the surfaces of the aggregate and the lip, respectively. Of the skin layers, the thickness of the skin layer 10 of the lip portion is important, and at least 1 μ, preferably 5 μ or more is required to improve scratch resistance and gloss, but if it is too thick, the lip portion Since the flexibility is impaired, it should be 50 μm or less, preferably 30 μm or less.

In the automobile molding of the present invention, the adhesive olefin polymer skin layers 11 and 13 may be provided on the lower portion of the molding body, if necessary. In the example of FIG. 3, the skin layers 11 and 13 are also provided on the lower portion of the aggregate 7 and the surfaces of the lower lip 12. The reason for providing the skin layer here is to enhance the adhesiveness to the automobile body, and the material thereof may be different from the skin layers 9 and 10.

FIG. 4 shows an embodiment of an optical specification molding, in which a molding main body composed of an aggregate 7, an upper lip 8 and a lower lip 12 is made of the soft olefin polymer. A glitter film 14 is inserted on the upper part of the aggregate 7, and a transparent skin layer 15 is provided on the upper part thereof. The transparent skin layer and the skin layer 10 of the upper lip may be the same or different, but both are made of the above-mentioned hard olefin polymer. Also in the example of FIG. 4, thin layers 11 and 13 of the adhesive olefin polymer skin layer are formed on the surfaces of the lower portion of the aggregate 7 and the lower lip 12, respectively.

When a hard adhesive olefin polymer is used in FIGS. 3 and 4, the skin layer 13 of the lower lip is 1 to 50 μm, preferably 5 as in the case of the upper lip. It is desirable to suppress the thickness to about 30 μ.

The soft olefin polymer that can be used in the present invention has a JISA hardness of 50 to 80, preferably 55 to 75, and is an olefin thermoplastic elastomer, a modified product thereof or a composition mainly containing the same. Are typical ones. The olefin-based thermoplastic elastomer contains an olefin rubber such as ethylene propylene rubber as a soft segment and an olefin resin such as polypropylene or polyethylene as a hard segment. Usually, the olefin rubber is partially or It is highly crosslinked. Then, non-crosslinked rubber such as polyisobutylene and oil are optionally mixed. The hardness can be widely varied depending on the composition. Further, examples of the modified product include a graft-modified product with maleic anhydride or the like. In addition, as the composition, a mixture of ethylene, a (meth) acrylic acid copolymer or a metal salt thereof, ethylene, (meth) acrylic acid, a (meth) acrylic acid ester copolymer or a metal salt thereof, etc. Can be illustrated.

The olefinic thermoplastic elastomer or a modified product thereof is commercially available under the trade name of, for example, Mirastomer, Thermolan, Sumitomo TPE, Santoprene, Gudmer, etc., and can be easily obtained from the market.

On the other hand, the hard olefin polymer used as the skin layer has a JISA hardness at 23 ° C. of 85 or more, preferably 90 or more, and is particularly excellent in scratch resistance, surface gloss and wax remover resistance. Considering it, ethylene, (meth) acrylic acid copolymer or its metal salt, or ethylene, (meth) acrylic acid, (meth) acrylic acid ester copolymer or its metal salt, or a resin mainly containing this It is preferred to use a composition. As such a resin composition, a mixture of the above-mentioned olefin-based thermoplastic elastomer can also be preferably used. Especially when resistance to wax remover at high temperatures is required, it is preferable to use a metal salt of the above-mentioned copolymer which has been modified to impart heat resistance. As a representative example of such a modified product, a modified product with a polyamide oligomer can be exemplified. Alternatively, a mixture of polyamides may be used.

As the adhesive olefin polymer skin layer that can be used in the lower portion of the molding, for example, those exemplified as the upper skin layer can be used.

[0017]

[Effect of device]

 According to the present invention, the structure of the molding body made of the soft olefin polymer and the skin layer made of the hard olefin polymer is adopted, and the thickness of the skin layer at the lip portion is specified, whereby It is possible to obtain an automobile molding with excellent wearability, scratch resistance, and wax remover resistance. In addition, the automobile molding of the present invention is based on an olefin polymer, has a lighter weight than conventional polyvinyl chloride, can be recycled as a material, and has no problem of generating corrosive gas during incineration, thus improving the environment. The contribution to

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conventional automobile molding (black specification).

FIG. 2 is a cross-sectional view of a conventional automobile molding (optical specification).

FIG. 3 is a sectional view of an automobile molding (black specification) according to the present invention.

FIG. 4 is a sectional view of an automobile molding (optical specification) according to the present invention.

[Explanation of symbols]

 1 Molle Aggregate 2 Aggregate Adhesion 3 Upper Lip 4 Lower Lip Adhesion 5 Bright Film 6 Transparent Resin Skin Layer 7 Molle Aggregate 8 Upper Lip 9 Aggregate Skin Layer 10 Upper Lip Skin Layer 11, 13 Lower Skin Skin Layer 12 Lower Lip 14 Bright film 15 Transparent resin skin layer

Claims (2)

[Scope of utility model registration request] 1. The JISA hardness of the upper material of the molding body is 5
A molding body made of a soft olefin polymer of 0 to 80 and a JIS A hardness of 8 laminated on the molding body.
It is composed of a skin layer of 5 or more hard olefin polymer and has a thickness of 1 at the lip portion of the molding body.
An automobile molding characterized by being ~ 50μ. 2. The adhesive olefin polymer skin layer is provided on the lower portion of the molding body.
Car mall.