JPS59184484A - Plastic heat generator - 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] [Technical Field] The present invention relates to automobile parts, electrical parts, building parts, equipment,
This relates to heating elements used in housing parts and the like.

[Background technology]

Traditionally, automobile parts, aerial parts, construction parts, equipment,
Heating elements used for housing parts, etc., are made of microcrystalline wire, ceramic heaters, etc., but they have drawbacks such as lack of freedom in shape, large number of parts, and heavy weight.

[Purpose of the invention]

An object of the present invention is to provide a lightweight heating element that has flexibility in shape and has a simple structure.

[Disclosure of the invention]

The present invention contains a conductive material and has a conductivity of 1 to 100Ω1.
The present invention will be described in detail below using a plastic heating element characterized in that a conductive circuit is formed using a thermosetting resin composition and is embedded between electrically insulating materials.

The conductive materials used in the present invention include carbon black, graphite, metal powders such as copper, aluminum, brass, and silver, metal fibers, and metal foils for rubber furnaces, rubber pyrolysis, batteries, rubber channels, etc. Although not particularly limited, it is preferable to use a powdered conductive material in combination with a powdered conductive material such as a powdered conductive material and a mixture thereof, either alone or as a mixture, in order to improve antistatic properties and prevent variations. That's true.

Thermosetting resin compositions include phenolic resins, urea resins, melamine resins, epoxy resins, unsaturated Borienute/I/1I51 resins, xylene resins, cresol resins, shea I37 phthalate resins, etc. alone, mixtures, modified products, etc. Thermosetting resins in general can be used without any particular limitation. It is necessary to add the conductive additive in an amount such that the conductivity of the thermosetting resin composition is 1 to 100 Ωα. That is, if it is less than 1 Ωα, heat generation is not sufficient, and if it exceeds 100 Ωα, the thermosetting resin composition will be overheated.

Therefore, the amount of conductive material added is preferably 10 to 10% of the total amount.
It is desirable that the content be 80% by weight (hereinafter simply referred to as ``chi'').

If necessary, a curing agent, a plasticizer, a curing accelerator, a surfactant, a coloring agent, a filler, a reinforcing agent, a lubricant, etc. can be added to the thermosetting resin composition.

Further, as electrical insulating materials, general military insulating materials such as thermoplastic resins, thermosetting resins, rubber, bituminous materials, inorganic materials, natural fibers, synthetic fibers, wood, mixtures, composites, etc. can be used. The shape of the heating element is also sheet-like, film-like, rod-like,
It can be used in any shape such as a prismatic shape.

1. The present invention will be explained below based on Examples.

Example 1 Add 1.5 mol of formaldehyde to 1 mol of phenol in 37 qb formalin, and then adjust the pH to 9 with aqueous ammonia.
After adjusting to
0% phenolic resin was obtained, and 25 parts of graphite was added to 100 parts of cough phenol resin (hereinafter simply referred to as parts). A conductive circuit was formed using a conductive phenol resin composition to which 5 parts of reminium foil was added, and the mixture was inserted between flexible epoxy resin sheets of one thickness and heated at 160°C for 60 minutes to obtain a plastic heating element. .

EXAMPLE A heating element was obtained in the same manner as in Example 1, except that 30 parts of phenol hammer fat and 79 parts of graphite were used as the conductive material.

Example 3 A heating element was obtained in the same manner as in Example 1, except that 125 parts of phenol/I/resin and 12.5 parts of carbon black were used as the conductive material.

[Effect of heat generation]

The results of comparing the plastic heating elements of Examples 1 to 3 with the conventional mycanichrome wire heating element are as shown in Table 1. As is clear from Table 1, the heating element of the present invention has the advantage of freedom of shape, simplicity of structure, and It was confirmed that the heat generating element was excellent.

Table 1 410

Claims (1)

[Claims] (1) Contains conductive material and has a conductivity of 1-100Ω
A plastic heating element characterized in that a conductive circuit is formed using the thermosetting MI resin composition of G and is embedded between electrically insulating materials.