JPH0560834U - Dustproof heat resistant cushion - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To prevent the generation of dust during work by making the heat-resistant cushion used for hot press work etc. conductive or semi-conductive. [Structure] A heat-resistant fiber cloth is impregnated with a dispersion containing a conductive powder such as fluororesin and carbon or metal powder to make it conductive or semi-conductive, and thereby the cushion body 1 is covered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a dustproof and heat resistant cushion that can be used for hot press work and the like.

[0002]

[Prior Art]

 A hot press work is performed to manufacture a laminated body or the like. At this time, a cushioning material may be placed between the hot plate of the hot press machine and the object to be pressed to prevent damage to the object to be pressed.

As such a cushioning material, there is known a material in which a felt-like fiber molded body is covered with a sheet by impregnating and hardening a glass cloth with an epoxy resin. While this cushion material has the advantage of producing less dust during work, it does not have sufficient heat resistance and has the problem that the epoxy resin melts and sticks to the hot press machine during hot press work. Therefore, in order to solve this problem, it has been proposed to coat the fiber molding with a fluororesin-impregnated glass cloth (Japanese Utility Model Publication No. 2-97007).

[0004]

[Problems to be solved by the device]

 However, this cushion material inevitably generates static electricity, which causes a new problem that dust is adsorbed and dust adheres to the hot press portion of the object to be manufactured during repeated hot press work.

[0005]

[Means for Solving the Problems]

 The dust-proof heat-resistant cushion according to the present invention comprises a cushion body covered with a fluororesin-impregnated fiber cloth having conductivity or semiconductivity.

Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a cushion body, which is made of a material having heat resistance and cushioning properties such as aramid fiber or metal fiber in a felt shape, asbestos, non-woven cloth, and glass wool. The cushion body may be a single-layer product, but may be a multi-layer product if desired.

The cushion body 1 is covered with a fluororesin-impregnated fiber cloth 2 having conductivity or semiconductivity. As the fluororesin-impregnated fiber cloth 2, a dispersion containing both conductive powder such as carbon powder or metal powder and fluororesin powder is impregnated into a heat-resistant fiber cloth such as glass fiber cloth or aramid fiber cloth to obtain conductivity or A cloth having semiconductivity can be used. The surface resistance of the cloth 2 is usually 10 ⁴ to 10 ⁶ Ω · cm. Reference numeral 3 denotes a sealing portion in which the ends of the fiber cloth 2 are joined together by heat fusion or a heat-resistant double-sided adhesive tape.

[0008]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to examples.

EXAMPLE A glass cloth having a thickness of about 0.1 mm was used as an aqueous dispersion containing both carbon powder and polytetrafluoroethylene (PTFE) powder (concentration of solid content: 60% by weight, weight ratio of carbon to PTFE: 0. It is immersed in 02/1), pulled up, and heated at a temperature of 380 ° C. for 1 minute to obtain a fluororesin-impregnated fiber cloth having a surface resistance of 10 ⁶ Ω · cm.

The fluororesin-impregnated fiber cloth is folded in two, and a felt-shaped aramid fiber molded body (cushion body) having a thickness of 5 mm is placed between the folded pieces, and the temperature is 380 ° C. and the pressure is 3 kg / cm ² . After heating and pressurizing for 3 minutes, the folded pieces were joined to each other by heat fusion on the three sides to obtain a dustproof heat resistant cushion having the same structure as shown in FIG.

This dustproof heat resistant cushion was placed on a hot plate of a hot press machine, and a heating and pressurizing operation was repeated for 200 cycles with a temperature of 250 ° C., a pressure of 30 kg / cm ² , and 60 minutes as one cycle. Even after this work, the cushioning property was maintained, there was no dust that could be visually confirmed, and neither melting of the fluororesin nor damage to the fiber cloth was observed, and it was of sufficient practicality. .

Comparative Example A heat resistant cushion was obtained in the same manner as in the example except that an aqueous PTFE dispersion (fluorine resin concentration 60% by weight) containing no carbon powder was used. When this cushion was subjected to the same test as in the example, much dust was attached.

[0013]

[Effect of the device]

 The present invention is constructed as described above, and since the cushion body is covered with the fluororesin-impregnated fiber cloth having conductivity or semiconductivity, dust is not attached even if the hot press work is repeated. It has the advantage of never happening.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a dustproof heat resistant cushion according to the present invention.

[Explanation of symbols]

 1 Cushion body 2 Fluororesin impregnated fiber cloth 3 Sealing part

Claims (1)

[Scope of utility model registration request] 1. A dust-proof heat-resistant cushion comprising a cushion body coated with a fluororesin-impregnated fiber cloth having conductivity or semiconductivity.