JPS59230204A - Method of producing conductive plastic film - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a conductive plastic film. More specifically, the present invention provides a method for inexpensively producing a flexible conductive plastic film with uniform and thin film thickness, excellent conductivity, smooth surface, excellent chemical resistance, and excellent mechanical strength. Regarding.

Conventionally, vinyl chloride resin, polyolefin resin, natural Zam 9 synthetic rubber, etc. have been used as a matrix for conductive plastic films.

However, with these materials, a conductive plastic film with good conductivity and small thickness has not been obtained. In other words, in order to reduce the thickness of the film, it is necessary to have good formability, and if the importance is placed on formability, it is necessary to limit the amount of conductive filler added. Resistance will increase. Conversely, if the amount of conductive filler added is increased, the electrical resistance will be reduced, but the fluidity will be lowered and the moldability will be deteriorated, making it extremely difficult to obtain a thin film of 100 μm or less.

The object of the present invention is to provide an inexpensive method for producing a flexible conductive plastic film that is free from such defects, has a uniform thickness, is thin, has excellent conductivity, has a smooth surface, has excellent chemical resistance, and has excellent mechanical strength. The goal is to provide the following.

In view of the above points, as a result of intensive research, the inventor of the present application added a conductive filler and plasticity to an organic polymer compound,
After kneading, in the method of manufacturing a conductive plastic film by forming the mixed wire into a film, a mixture of chlorinated vinyl chloride resin and chlorinated polyethylene is used as the organic polymer compound, and diallyl phthalate monomer or diallyl isophthalate is used as the plasticizer. We came up with the idea of using monomers and achieved the above objective.

The chlorinated vinyl chloride resin defined in the present invention is a resin produced by post-chlorination of vinyl chloride resin.
It contains 0% chlorine and has a degree of polymerization of 500 to 1500. Alternatively, the chlorinated polyethylene defined in the present invention is a resin produced by the arsenic salt method after polyethylene with a molecular weight of 40.000 to 200.000, and contains 30 to 45% chlorine. However, in the present invention,
Since it is possible to add a larger amount of conductive filler and the moldability is also improved, the molecular weight of the raw material polyethylene is 150.00.
It is preferable that the chlorine content is 0 or less, and the chlorine content is 35 or less.

In the present invention, diazil phthalate monomer or diallyl isophthalate monomer is further used as a plasticizer. DOP and DBP are generally used as plasticizers for chlorinated vinyl chloride resin and chlorinated polyethylene.

TCP, DOA, I)O8, etc. are known, but these plasticizers tend to cause deterioration of the blended resin during the process of adding conductive fillers, kneading, and molding, making it difficult to obtain a uniform and thin conductive film. It is extremely difficult to mold it, and even if it were possible to mold it, the mechanical strength would be significantly reduced, making it completely unusable. In the present invention, either the diallyl phthalate monomer or the diallyl phthalate monomer may be used, but the latter is more effective in preventing deterioration of the chlorinated vinyl chloride resin and chlorinated ethylene mixture, but is expensive.

If necessary, both may be used as a blend. 'The conductive filler used in the present invention is preferably a metal fine powder, conductive casen black, scaly graphite fine powder, etc., but in order to obtain a uniform and thin film, the filler must have a coarse particle size. It is preferable that the average particle diameter is 10 μm or less and the content of coarse particles of 100 μm or more is 0.5% or less. In order to improve moldability, some lubricants and stabilizers may be added as additives to the above materials as necessary, and other chlorine-containing resins such as chlorinated PP, vinyl chloride resin, etc. may be added to improve kneadability. May be added.

Next, the blending amount of each material in the present invention will be specified.

In the conventional technology, the appropriate amount of conductive filler added was 20 to 50% by weight based on 100% of plastic, but in the present invention, in the case of fine metal powder and fine graphite graphite, plastic and plasticizer When the added value is 100, it is possible to add 100 to 300% by weight', and in the case of a conductive casen blank, 40 to 100% by weight, to make the electrical resistance of the kneaded product extremely small. be able to.

Moreover, even with such a high filler formulation, 100 μm can be easily obtained.
It has the excellent characteristics of being able to be molded into the following films.

Next, a method for manufacturing a conductive plastic film using the above material will be explained.

First, 5 to 15% by weight of chlorinated vinyl chloride resin1.・Chlorinated polyethylene 5-20% by weight, conductive filler 20%
~75% by weight and 10~50% of plasticizer are mixed thoroughly using a high-speed mixer such as a Hengel mixer, and then mixed using a mixing machine that applies shearing force, such as a mixing roll or a pressure kneader. Heat and knead using Next, the kneaded product is molded using a heat roll to obtain a conductive plastic film having a thickness of 100 μm or less.

As mentioned above, the product can be obtained through extremely simple steps.

In particular, the method of the present invention makes it possible to easily produce a conductive film with a thickness of 100 μm or less, which has been extremely difficult to produce in the past.

Next, the present invention will be specifically explained with reference to Examples.

Example 1 Chlorinated vinyl chloride resin with a degree of chlorination of 65 [■ Nikatemp T-025 manufactured by Nippon Carbide] 10% by weight, degree of chlorination 3
5% by weight of chlorinated polyethylene [■ Gisorak H-135 manufactured by Osaka Soda Co., Ltd.], 70% by weight of natural scaly graphite fine powder with an average particle size of 6 μ [■ 08P-E manufactured by Nippon Graphite Co., Ltd.], 15% by weight of diallyl inphthalate monomer were thoroughly mixed using a Henschel mixer, and the mixture was heated in a pressure kneader.
It was kneaded using. The mixed wire material was molded to a thickness of 50 μm using a heat roller to obtain a conductive plastic film.

The surface resistance of the obtained film was 100Ω, and the specific resistance was 06
It was 40α.

Example 2゜10% by weight of the same chlorinated vinyl chloride resin as in Example 1, 20% by weight of the same chlorinated polyethylene, conductive casen blank [■Ketsutan Black EC manufactured by Japan Easy Co., Ltd.] 30
% by weight, and 40% by weight of diallyl phthalate monomer were uniformly mixed using a Henschel mixer, and the mixture was kneaded using a heated pressure kneader. The mixed wire material was molded to a thickness of 50 μm using a heat roller to obtain a conductive plastic film. The surface resistance of the obtained film was 150
0, and the specific resistance was 0.7 Ωm.

Example 1. The thickness variation of the film obtained in Example 2 is extremely uniform, at most ±5μ, and the surface is smooth, maintaining the excellent chemical resistance of chlorinated vinyl chloride resin and chlorinated polyethylene. The film is a conductive plastic film that has mechanical properties of tensile strength of 100 or more and sufficient flexibility. Therefore, the conductive plastic film according to the present invention can be used as a circuit material for electrical components.

It has excellent properties as an antistatic material, electromagnetic shielding material, and electrode material for thin batteries. Furthermore, as shown in the examples, since inexpensive materials are processed through simple steps, it is possible to provide a conductive plastic film at an extremely low cost.

Patent applicant: Mitsubishi Pencil Co., Ltd.

Claims (1)

[Claims] 1. In a method of manufacturing a conductive plastic film by adding a conductive filler and a plasticizer to an organic polymer compound, kneading the mixture, and then forming the kneaded product into a film, the organic polymer compound is chlorinated vinyl chloride. A method for producing a conductive plastic film, characterized by using a mixture of a resin and chlorinated polyethylene, and a diallyl phthalate monomer or diallyl isophthalate monomer as a plasticizer.