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Self-temperature limiting heating belt and producing method thereof

A manufacturing method and heating belt technology, which are applied in the direction of ohmic resistance heating, heating element materials, electric heating devices, etc., can solve the problems of large equipment investment, high production conditions and costs, high equipment conditions, etc., and achieve high cross-linking degree, Low production conditions and the effect of reducing production costs

Inactive Publication Date: 2009-12-02
四平市科学技术研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the manufacturing process of this kind of heating belt needs to adopt the radiation cross-linking method, and its equipment conditions are relatively high, and the equipment investment is relatively large, which is unavailable to general manufacturers, making its production conditions and costs high.

Method used

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  • Self-temperature limiting heating belt and producing method thereof
  • Self-temperature limiting heating belt and producing method thereof
  • Self-temperature limiting heating belt and producing method thereof

Examples

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Embodiment 1

[0020] Example 1 : 1. Raise the temperature of the rubber mixing machine to 85-90 ℃, and keep the temperature constant for 30-45 minutes, and mix various raw materials according to the following weight ratio: 100 parts of polyethylene, 40-45 parts of fluororubber, 55-65 parts of carbon black, Put 8-12 parts of joint agent and 0.5-1 part of antioxidant into the rubber mixing machine for mixing. The mixing time is 30 minutes. The temperature is controlled at 85-90°C for the first 15 minutes and 90-98 ℃, crush the PTC material after mixing, stir evenly, and then pack it for use;

[0021] 2. Preheat the single-screw extruder, keep the head temperature at 130°C, the body temperature at 126°C, the tail temperature at 102°C, and the mold temperature at 132°C; load the PTC material for packaging from the hopper at the tail end, and use Two regular stranded wire cores of 7 tinned round copper wires at equal intervals, each round copper wire φ = 0.49 mm, pass through the extrusion die...

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Abstract

The invention belongs to the technical field of electric heating devices, and discloses a method for manufacturing a self-limiting temperature heating belt. The heating element of the heating belt uses two parallel metal wire cores with a certain distance as electrodes, and continuously lays a kneaded wire core on it. The composite PTC material layer is used as the heating element to form the PTC core of the electric heating element, and then it is prepared by overall chemical cross-linking and then coated with a layer of polymer insulating sheath. The self-limiting temperature is 65±5℃, 85℃ respectively. ±5℃, 105±5℃, the cross-linking degree of the core is 75-95%, and can be widely used in antifreeze, heat preservation, heat tracing and heat preservation projects.

Description

Technical field: [0001] The invention belongs to the technical field of electric heating devices, and more specifically belongs to a self-limiting temperature heating belt and a manufacturing method thereof. Background technique: [0002] The electric heating element of the traditional electric heater uses metal resistance material as the heating element, and its resistivity changes little with temperature. Under the rated voltage, the electric heating power is basically constant. Only by adding electronic control equipment can the automatic adjustment of power be realized. But the technology is more complicated, the cost is higher, and it is inconvenient to maintain. In 1961, F.kohler used low-pressure polyethylene (HDPE) to fill carbon black (CB) to make a composite material, and found that its resistivity had a positive temperature coefficient (Positve Temperature Coefficint), referred to as PTC material. The resistivity of this material not only increases with the incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/14H05B3/34
Inventor 潘永忠魏晓春
Owner 四平市科学技术研究院
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