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Preparation method and application of large-area flexible electric heating sheet

A technology of flexible electricity and heating sheets, which is applied in the direction of ohmic resistance heating, ohmic resistance heating parts, electric heating devices, etc., can solve the problems of insufficient softness, poor folding resistance and bending resistance, low use efficiency, etc., and achieve heat generation Fast speed, avoid alternating hot and cold, avoid the effect of hard texture

Pending Publication Date: 2021-11-09
深圳市煦阳新材料技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual use, because the carbon fiber heating element is a single chopped carbon fiber material, there are certain pores in the heat transfer and heat generation density, the texture is not soft enough, the folding resistance and bending resistance are poor, and cannot Effectively further expand the heating area of ​​the electric heating sheet, and the actual use efficiency is low

Method used

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  • Preparation method and application of large-area flexible electric heating sheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 The first aspect provides a method for preparing an area flexible electric heating sheet, the steps at least include the following steps: (1) preparation of nano-carbon composite film; (2) film punching; (3) bonding of flexible conductive electrodes ; (4) thermal film bonding; (5) surface flexible substrate bonding.

[0045]The preparation of the nano-carbon composite film (in parts by weight): (1) take 70 parts of nano-carbon powder, a mixture of multi-walled carbon nanotubes and graphene and 30 parts of polyurethane resin, and melt and blend them uniformly through a high-speed mixer. The mixing temperature is 180°C; (2) After mixing evenly, the composite material is cast, calendered, drawn and shaped to obtain a uniform composite film; (3) Print conductive silver paste on the surface of the composite film to prepare a conductive silver paste layer, bake You get it.

[0046] The square resistance of the conductive silver paste is 8 milliohms; the thicknes...

Embodiment 2

[0068] The specific implementation of this embodiment is the same as that of Embodiment 1, except that the mass ratio of nano-carbon powder, multi-walled carbon nanotubes and graphene is 3:5:2.

Embodiment 3

[0070] The specific implementation of this embodiment is the same as that of Embodiment 1, except that the fineness of the nano-carbon powder is 120nm.

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Abstract

The invention discloses a preparation method and application of a large-area flexible electric heating sheet. The preparation method at least comprises the following steps: (1) preparing a nano carbon composite film; (2) punching the film; (3) attaching a flexible conductive electrode; (4) laminating a heat-conducting film; and (5) surface flexible base material lamination. In the application, the flexible electric heating sheet prepared by the composite preparation method of the nano-carbon composite film and the multi-layer functional layer film has excellent electric heating performance, meanwhile, the defects of hard texture, obvious foreign body sensation, poor air permeability and the like of some existing electric heating sheets are avoided, and the flexible electric heating sheet has excellent electric heating efficiency and bending and washing resistance, and thus, has a wide development prospect.

Description

technical field [0001] The invention relates to the field of H05B3 / 02 classified by IPC, in particular to a preparation method and application of a large-area flexible electric heating sheet. Background technique [0002] Heat sources play an important role in people's production, life and scientific research. A surface heat source is a type of heat source. The surface heat source is a two-dimensional structure, and the object to be heated is placed above the two-dimensional structure to heat the object. Therefore, the surface heat source can heat all parts of the object to be heated at the same time, with a large heating surface, uniform heating and high efficiency. Surface heat sources have been successfully used in industrial fields, scientific research fields, or living fields, such as electric heaters, electric blankets, infrared therapeutic devices, and electric heaters. [0003] The existing surface heat source generally includes a heating element and at least two e...

Claims

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Application Information

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IPC IPC(8): H05B3/34H05B3/14H05B3/03H05B3/02
CPCH05B3/34H05B3/145H05B3/03H05B3/02
Inventor 童潇马冬雷苏同峰汤同森
Owner 深圳市煦阳新材料技术有限公司
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