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Self-limiting temperature electrothermal membrane of PTC high-molecular conductive fiber and preparation method thereof

A technology of polymer conduction and conductive fibers, which is applied in the direction of electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of small cracks in the conductive film layer, potential safety hazards, and shedding of the conductive film layer, and achieve easy continuity The effect of simple production, simple structure, and extended service life

Active Publication Date: 2012-01-04
XIAN GAIWO THERMAL ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difference in thermal expansion coefficient between the conductive film layer and the base material, air bubbles are easily formed between the conductive film layer and the base material after repeated heating-cooling, causing the conductive film layer to fall off; at the same time, repeated heating-cooling causes the conductive film layer to easily produce tiny cracks, making the resistance The value gradually increases during use, and the electric heating power attenuation is more obvious
In addition, the leakage current of the traditional planar heating film is relatively large, and it is difficult to pass through the existing leakage protection device, posing a safety hazard

Method used

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  • Self-limiting temperature electrothermal membrane of PTC high-molecular conductive fiber and preparation method thereof
  • Self-limiting temperature electrothermal membrane of PTC high-molecular conductive fiber and preparation method thereof
  • Self-limiting temperature electrothermal membrane of PTC high-molecular conductive fiber and preparation method thereof

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preparation example Construction

[0044] The preparation method of PTC polymer conductive fiber self-limiting temperature electric heating film of the present invention includes the following steps:

[0045] Step 1. Preparation of carbon black filled polyethylene-based PTC conductive fiber 5:

[0046] Weigh 10-50 parts by weight of carbon black, 1-11 parts by weight of carbon fiber, 20-50 parts by weight of nano calcium carbonate, 1-5 parts by weight of calcium stearate, 1-5 parts by weight of magnesium stearate, and diisopropyl peroxide 0.001 to 0.010 parts by weight of propylbenzene, 0.1 to 2.0 parts by weight of vinyl tris(2-methoxyethoxy) silane, 0.1 to 2.0 parts by weight of dodecylbenzene sulfonic acid, and salicylamide phthalate 1-10 parts by weight of imide, placed in a high-speed mixer and stirred at high speed for 20-25 minutes to obtain a carbon black composition;

[0047] Separately weigh 100 parts by weight of polyethylene resin and 1-50 parts by weight of ethylene-vinyl acetate copolymer for use;

[004...

Embodiment 1

[0057] Step 1. Preparation of carbon black filled polyethylene-based PTC conductive fiber 5:

[0058] Weigh 10kg of carbon black, 11kg of carbon fiber, 20kg of nano calcium carbonate, 1kg of calcium stearate, 5kg of magnesium stearate, 0.001kg of dicumyl peroxide, and 0.1 of vinyl tris(2-methoxyethoxy) silane. kg, 0.1 kg of dodecyl benzene sulfonic acid and 10 kg of salicylamidophthalimide, placed in a high-speed mixer and stirred at high speed for 20 minutes to obtain a carbon black composition;

[0059] Weigh 100kg of low-density polyethylene resin and 1kg of ethylene-vinyl acetate copolymer for use;

[0060] A reciprocating single-screw extruder is used for melting and extrusion spinning, wherein one feed port of the extruder conveys the carbon black composition, and the other feed port conveys low-density polyethylene resin and ethylene-vinyl acetate copolymer , The spinning speed is 1000m / min, and after water cooling at room temperature, it is reeled to obtain a carbon black-fi...

Embodiment 2

[0067] Step 1. Preparation of carbon black filled polyethylene-based PTC conductive fiber 5:

[0068] Weigh 50 kg of carbon black, 1 kg of carbon fiber, 50 kg of nano calcium carbonate, 5 kg of calcium stearate, 1 kg of magnesium stearate, 0.01 kg of dicumyl peroxide, and 2 kg of vinyl tris (2-methoxyethoxy) silane , 2 kg of dodecyl benzene sulfonic acid and 1 kg of salicylamide phthalimide are placed in a high-speed mixer and stirred at high speed for 25 minutes to obtain a carbon black composition;

[0069] Weigh 100kg of high-density polyethylene resin and 50kg of ethylene-vinyl acetate copolymer for use;

[0070] A reciprocating single-screw extruder is used for melting and extrusion spinning, wherein one feed port of the extruder conveys the carbon black composition, and the other feed port conveys high-density polyethylene resin and ethylene-vinyl acetate copolymer , The spinning speed is 100m / min, after water cooling at room temperature, rewinding, the carbon black-filled pol...

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Abstract

The invention relates to a self-limiting temperature electrothermal membrane of a high-molecular conductive fiber with a positive temperature coefficient (PTC). The electrothermal membrane comprises a first insulating layer, a second insulating layer and a high-molecular PTC conductive braid layer, wherein the high-molecular PTC conductive braid layer consists of a braid lower layer, a plurality of polyvinyl PTC conductive fibers with carbon black filled type and two current carrying strips. The polyvinyl PTC conductive fiber with carbon black filled type is composed of the following raw materials: a polyethylene resin, an ethylene-vinyl acetate copolymer, carbon black and a carbon fiber and the like. The electrothermal membrane has advantages of stable electrothermal function and good flame retardant property. The preparation method comprises the following steps: preparing polyvinyl PTC conductive fibers with carbon black filled type; preparing a high-molecular PTC conductive braid layer; and carrying out calendaring moulding on a first insulating layer, a second insulating layer and the high-molecular PTC conductive braid layer. The method has advantages of simple process flow, low cost and easy realization.

Description

Technical field [0001] The invention belongs to the technical field of preparation of electric heating materials, and specifically relates to a self-limiting temperature electric heating film of PTC polymer conductive fiber and a preparation method thereof. Background technique [0002] Planar electric heating products are mainly composed of semiconductor heating elements, current carriers, and insulating materials. The mainstream products of low-temperature radiant electric heating film are made of parallel conductive ink carrier bars and silver powder paint bus bars sandwiched between insulating polyester (PET) films. The electric heating film is connected to the power supply through wires to convert electrical energy into heat. The American Calorique electric heating film contains two layers of insulating polyester film, the middle ink line is conductive ink, and the thickness is about 0.2mm ~ 0.3mm. Chinese patent application number 99111331.4 (publication number CN1255037, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/36H05B3/10D03D15/00D03D13/00D03D15/283D03D15/533
Inventor 计晓荣宋义虎强弱强鸿儒
Owner XIAN GAIWO THERMAL ENERGY TECH
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