RU114U1 - Flat multilayer heating element - Google Patents

Abstract

A flat multilayer heating element in the form of a product of an alternating conductive layer based on carbon fiber paper, along whose opposite ends are conductive busbars, and electrically insulating layers made on both sides of the conductive layer of synthetic polymers and paper, characterized in that the insulating layers are composed of a thermoplastic film and sheets of paper and pressed directly to the electrically conductive layer.

Description

M.C. 5 H05B 3 / I2, .3 / I4,3 / I8 | Д01Р 9 / 12.9 / 16 $ 1 ШВ «27 / 06.27 / 10.

FLAT SHOPPING NLRSHTELIPG ELGYAT

The utility model represents such a commodity as a flat multilayer heating element based on an electrically conductive layer of carbon fiber paper and insulating layers on both sides of a sheet of carbon fiber paper.

Such a utility model can find the widest use in many industries, agriculture, construction, transport, as well as for heating work and residential premises

Known flat multilayer heating elements, which are products of an alternating electrically conductive layer of a composite material containing carbon fibers dispersed in a cured thermosetting binder, and electrically insulated slashes on both sides of the electrically conductive layer made of a cured thermosetting viola. When an atom along the opposite ends of the electrically conductive sheet is fixed current-carrying busbars / I /.

Also known are flat multilayer heating elements representing products with an alternating conductive layer of nonwoven material and carbon fiber willows and insulating layers on both sides of the conductive layer made of a cured thermosetting resin. Along the opposite ends of the electrically conductive layer, toxo-driving tires / 2 / are fixed.

The closest constructional analogue and purpose analogue of the claimed utility model is a flat multilayer heating element / 3 /, manufactured in Russia with the trademark СЛ01ОТ. This element is a product of alternating electrically conductive oloy based on carbon fiber paper containing carbon fibers and crushed cellulose, and insulating layers on both sides of a sheet of carbon fiber paper made of synthetic polymers and paper. Along opposite the ends of the sheet of carbon fiber paper are conductive busbars. As an electrically conductive oloy, Carbon fiber paper containing carbon fiber in mass 1 was used as a solidified thermosetting binder. 5 75 chopped cellulose. 25 + 95.

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characterized by rigidity, their manufacture is based on the processing of thermosetting binders, which are toxic in the uncured ootoyaniyu. CJTOTRPM cements can emit gaseous substances during the first hours of operation. The production of these elements is associated with the use of perfume of at least ICC kGf / cm and a press holding time of I50tI90 ° C up to min. per I mm of package thickness, i.e. with a thickness of elements up to 4 mm, the exposure time can reach 40 minutes. per item

The objective of the proposed utility model is to eliminate the above disadvantages, i.e. creation of a flat heating element, characterized by flexibility, environmental safety of production and operation, reduction of energy consumption during manufacture.

This problem is solved by the claimed utility model, which is a flat multilayer heating element in the form of a product from an alternating electrically conductive layer and based on an electrically conductive carbon fiber paper with current-conducting tires attached to it and electrically insulating layers pressed directly to the electrically conductive layer on both sides of it, insulating layers are made of paper and thermoplastic polymer film.

Carbon fiber paper used as an electrically conductive layer is made of carbon fiber and pulp, taken in the ratio of 3teC and max. $. Respectively. The busbars are fixed along opposite ends of a sheet of carbon fiber paper on one side or both sides of the sheet.

A method of manufacturing the claimed utility model is that along the opposite ends of the sheet of carbon fiber bugpgi fasten current-carrying tires. Next, they collect a pack of alternating layers of thermoplastic Helen, paper, thermoplastic film, carbon fiber paper, thermoplastic film, paper and thermoplastic film. Additionally, layers of decorative paper and thermoplastic film can be added on the outside of the bag.

The assembled packet was preliminarily at BUT T ° C and at a pressure of 5–30 kG / cm for 2 –E min. on pay-t in iol

The resulting flat multilayer heating element provides a constant surface temperature with a specific power of 0.6 I kW / m and can withstand at least ;;, 50 double bends without compromising integrity and performance. Warranty period of continuous heating of at least 5000 hours; "p.

The design of the utility model allows to realize the automatic process of its manufacture.

The novelty is confirmed by the fact that a flat multilayer electric heating element of the claimed design scheme was not known before. In the prototype element, as the insulating layers, layers made of paper impregnated with a cured tershreactive polshh rnsh binder are used. In addition, in the prototype used as an electrically conductive layer of carbon fiber paper, impregnated with a hardened thermosetting binder.

On Fig presents a structural diagram of the claimed utility model

(I) - conductive layer, C; ) - current-carrying tires, (3) - insulating layers of paper, (4) - insulating layers of thermoplastic film, (5) - layers of decorative paper.

For a better understanding, we give examples of specific implementations of the claimed utility model.

EXAMPLE I. A flat multilayer heating element is made on the basis of an electrically conductive carbon fiber paper with a surface electrical resistance (R. a) of 30 ohms (TU 13-OI617-81). The size of the paper sheet is 0.4 by 0.6 m (0.24 m2). A pressing bag is drawn from the following alternating layers of a plastic film (thickness 100 μm), decorative paper, plastic film, wrapping paper, plastic film, carbon fiber paper, plastic film, wrapping paper, plastic film, decorative paper, plastic film.

Current-carrying tires are cut out of copper electrolytic foil with a thickness of 50 μm and a width of 10 mm. "These tires heel on the two opposite ends of carbon fiber paper on one side of it using CONTACT glue1.

The assembled bag is pressed on a hydraulic press for electric heating in the following mode}

-loading the package at

-pressure at the same temperature and at a specific pressure of 30 kGo / oh

- exposure under the same conditions 2 min.,

- power consumption 100 - 10 watts,

rated voltage

(direct or alternating current) 36 V, the temperature of the working surface 45 5 ° C.

Voy source materials and the finished product are flammable and non-toxic: MPC (maximum permissible concentration) in the air of the working area during production and operation of the product are not standardized. After direct exposure to water, the product withstands a voltage of 3750 V, supplied perpendicular to the plane of the element, without breakdown. The product does not change the shape, appearance, performance when exposed to three strokes with an energy of each 0.5 W.

Examples 2-4 are made under the conditions of example T, all of these data are preliminarily shown in the Table,

numbers

characteristics

examples

thermo shrink film PE film thickness, micron product thickness, mm electric. resistance, ohm 12 x s power consumption 100 ± 10 25 ns, BT rated supply voltage (alternating or constant current), b36 flexibility, chiolo double bends without destruction, electric strength after direct exposure to water, during the warranty period of continuous heating, at least three working surfaces WITH

The presented data confirms that the task of repk-on.

Avtomgg S / Levit R.M p 5 not 55 polyethylene 100 ± 10 0.7 ± 0.1 0 ± 5 4 ± 1 80 ± 40 150 ± 30 175 ± 25 0 $ not less than 5000zh 1055 60

Sources of information taken into account when compiling

applications

1. Japanese laid-out application $ 57-48838, calculation T8LO. &, SHI3 3 06 V 3/14.

2. Japan's accepted application # 63-P757, calculation Yab.1.80 Ј 55-166892, acceptance 03.15.88, MKI4 N 05 V 3/20,

3.Shalun G.B., Lam A.A. SLOTS heating element made of chopped plastic. L., DSPHTP, 1081, 20 p.

Claims (1)

A flat multilayer heating element in the form of a product of an alternating conductive layer based on carbon fiber paper, along whose opposite ends are conductive busbars, and electrically insulating layers made on both sides of the conductive layer of synthetic polymers and paper, characterized in that the insulating layers are composed of a thermoplastic film and sheets of paper and pressed directly to the electrically conductive layer.