JPH11170928A - Wire harness component for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate molding, strengthen the component mechanically, and easily dissolve it with microbes such as bacteria due to ground embedding, by using molding resin having biodegradable resin as components and molding it. SOLUTION: A connector 1 is molded by injection molding as biodegradable resin and a wire hardness component and buried under ground to be dissolved. When usual resin is mixed with biodegradable resin, chemical reaction may occur or may not occur between the both. For example, when cellulose material, α-amino acid and the like are mixed, the both may be chemically bound to be biodegradable. Even when the connector will be buried under ground to dispose it in the future, by using biodegradable resin it is decomposed by microbes such as bacteria under the ground to keep environment well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness component used in an automobile, and more particularly to a wire harness component formed by injection molding, extrusion molding, or the like.

[0002]

2. Description of the Related Art In automobiles and the like, a conventional connection wiring for connecting each electric unit uses a bundle of covered electric wires to form a wire harness. There has been proposed a method of efficiently wiring by using a flat cable formed of a large number of electric wires arranged in parallel. Also in the wire harness using this flat cable, when it is installed at a predetermined position of an automobile, it is required that it be held and fixed in a stable state not only at the time of installation but also after traveling.

For this reason, conventionally, polypropylene, nylon, and polybutylene terephthalate have often been used. Of course, other polyester resins could be used, but when they were disposed, they were not decomposed by microorganisms such as soil bacteria, and there was no effective way to use the waste. Met.

[0004]

The wire harness components used in conventional automobiles are either burned or buried in the soil at the time of disposal, solely in pursuit of performance and cost. Combustion treatment has problems such as generation of carbon dioxide gas and other harmful gases and global warming, and underground burial requires preparation of a burial place, and sometimes causes pollution, which has become extremely difficult to treat. Therefore, countermeasures without these problems are awaited.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and the outline thereof is as follows. The present invention uses a resin having a biodegradable resin as a component as a molding resin,
An automotive wire harness part characterized by being molded. The molding resin used individually includes a biodegradable resin such as urea-based, biodegradable polyester-based, poly (ε-caprolactone) -based, A component for a wire harness for an automobile, comprising at least one resin selected from a polylactic acid type, a polyvinyl alcohol type, and a water-soluble cellulose type.

In the above description, examples of the polyester resin as a biodegradable resin include a substituted polyester and an aliphatic polyester synthesized from methyl or ethyl ester of t-lysine. Polyethylene and polyamide are not biodegradable at all, and the more aromatic groups, the less biodegradable. In the present invention, in addition to the case where the biodegradable resin is used alone, it may be mixed with a normal non-biodegradable resin, but the non-biodegradable resin in the waste remains. However, it cannot be denied that such materials are used in terms of required characteristics and cost. When a normal resin and a biodegradable resin are mixed, some of them cause a chemical reaction and some do not. For example, when a cellulosic material, an α-amino acid, or the like is blended, a chemical bond may be formed between the two and biodegradability may occur.

In the present invention, since the object is a component for a wire harness for an automobile, specifically, a plastic component such as a protector, a clip and a connector is conventionally formed by injection molding of polypropylene, nylon, polybutylene terephthalate or the like. By using the biodegradable resin as this resin, even if the resin is buried in the soil at the time of disposal in the future, the decomposition proceeds by microorganisms such as bacteria in the soil, thereby improving the environment. I can keep it. Of course, at the practical stage before disposal, a material that satisfies mechanical properties, electrical properties, and chemical properties and that is easy to mold and that does not cost much is selected.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a biodegradable resin and a wire harness part used in the present invention, a connector 1 shown in FIG.
Was molded by injection molding, buried in the soil and decomposed in one year.

Example 1 1 to 1.3 moles of formaldehyde were reacted with 1 mole of urea, and a cellulose material was added thereto to prepare a urea-based resin. The connector 1 shown in FIG. 1 was injection-molded. The mechanical strength of the molded article was sufficient for a connector, and it was confirmed that the molded article was gradually decomposed by microorganisms such as bacteria when buried in the ground.

Example 2 0.1 to 5 parts by weight of a polyvalent isocyanate was added to 100 parts by weight of an aliphatic polyester and reacted to obtain an aliphatic polyester having a melting point of 70 ° C. or more. A mixture of 0.1 to 50 parts by weight of a fatty acid ester of sucrose with respect to 100 parts by weight of this resin can be injection-molded, and is sufficiently used as a component for a wire harness for automobiles, such as insulation, mechanical properties, and heat resistance. It was confirmed that the substance could be gradually decomposed by microorganisms such as bacteria when buried underground.

Example 3 A polyaddition system containing a polyalkylene oxide structure in a side chain,
Alternatively, polycondensation resins can be injection-molded, have excellent heat resistance, mechanical properties, and electrical insulation properties, can be easily molded into connectors, etc., and when buried underground, gradually become microorganisms such as bacteria. Decomposed.

Example 4 When a connector or the like was injection-molded using a gluten biodegradable resin, molding was easy, and it was easily decomposed on the way by spoilage bacteria.

Example 5 A connector was obtained by injection molding a resin containing a copolymer of 3-hydroxybutyrate and 3-hydroxyvalerate as a main component. When this was buried in the soil, it was very easily decomposed by microorganisms such as bacteria.

The power of decomposition by microorganisms such as bacteria is
Since it depends on the type of soil, temperature, atmosphere, humidity, weather change, etc., it cannot be said unconditionally, but when the connector of the above embodiment was buried in the soil for one year, about 40% decomposition was recognized in many cases. Was.

[0015]

In summary, as described above, the present invention relates to a method of molding a wire harness material using a resin material which is easily biodegraded by bacteria when buried in soil. A resin having a biodegradable molecular structure can be easily used as a constituent of a resin, or by mixing a resin constituent having such a molecular structure with another ordinary resin constituent in a certain range. It can be manufactured and has various properties, but it is easy to mold,
One that was mechanically strong and easily decomposed by microorganisms such as bacteria when buried halfway was obtained. FIG. 1 is merely an example, and the present invention is not limited to this.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a connector experimentally manufactured according to the present invention.

[Explanation of symbols]

 1 Connector

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 67/00 C08L 67/00 101/00 101/00

Claims (4)

[Claims] 1. A component for a wire harness for an automobile, characterized in that a resin having a biodegradable resin as a constituent component is used as a resin for molding. 2. The biodegradable resin is at least one resin selected from urea, biodegradable polyester, poly (ε-caprolactone), polylactic acid, polyvinyl alcohol, and water-soluble cellulose. The component for a wire harness for an automobile according to claim 1, comprising: 3. The resin for molding according to claim 1, wherein the resin forming the biodegradable resin and the polymer forming the ordinary resin are copolycondensed with each other. Automotive wire harness parts. 4. The component for an automobile wire harness according to claim 1, wherein the molding resin is a mixture of a biodegradable resin and a normal molding resin.