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Preparation method of polymer-based PTC trace heating tape

A polymer-based, heat-tracking technology, applied in the direction of sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problems of large starting current, flammability, low resistivity, etc., to enhance adhesion, increase The effects of stability and reproducibility

Inactive Publication Date: 2018-12-07
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past ten years, polymer-based PTC composite materials have been widely used, especially the important product of polymer-based PTC composite materials - polyethylene-based self-limiting temperature heating cable belt, which has many excellent features that other traditional heating elements do not have. Performance, such as preventing overheating, saving electric energy, convenient use and maintenance, and automation, is widely used in petroleum, chemical industry, home appliances, medical equipment, etc. Research and development of self-limiting temperature heating cables with excellent performance have an important reality Significance, such as Chinese Patent Application No. 201410081081.2 discloses a modified PTC conductive composite material and its preparation method and application, using crystalline polyolefin polymer as the matrix, conductive material as filler to modify the matrix material, and the modified PTC prepared PTC conductive composite materials have the characteristics of low resistivity, high strength, good resistance reproducibility, and excellent resistance stability. However, due to the relatively low technology of self-limiting temperature heating cables produced in my country, although they have been put into production, there are still short lifespan, Flammability, poor mechanical properties, low heating temperature and large starting current, etc.

Method used

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  • Preparation method of polymer-based PTC trace heating tape
  • Preparation method of polymer-based PTC trace heating tape
  • Preparation method of polymer-based PTC trace heating tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of polymer-based PTC heating tape in the present embodiment, the concrete steps are as follows:

[0027] 1) Reinforcing material pretreatment: First, place the alkali-free glass fiber in a muffle furnace for heat treatment at 410 °C for 2 minutes, and then put it into a HCl treatment solution with a mass fraction of 1.0 mol / L for 1 hour, and weigh the mass fraction as HCl soaking. The 1.0% vinyl triethoxysilane coupling agent of the glass fiber, the weighed coupling agent was prepared into a 4% coupling agent solution, and then the glass fiber was soaked in the solution for 2 hours to make the silane coupling agent. The glass fiber is coated with the linking agent, and finally the treated glass fiber is placed in a 450 ℃ oven for constant temperature treatment for 4 hours, taken out and cooled at room temperature for 1 hour to obtain the modified glass fiber;

[0028] 2) Weigh the vinyl triethoxysilane coupling agent, the purity is 98%, the partic...

Embodiment 2

[0032] This example is the same as Example 1, the difference is that the heat treatment temperature of step (1) in the preparation method of the polymer-based PTC heating tape in this example is 450 ° C, the time is 1min, the HCl solution of the treatment liquid concentration 1.2mol / L is soaked The time is 1.5h, the step (2) melting inhibitor is 98% pure, the particle size distribution is 0.6μm, and the specific surface area is 4m 3 / g of ultrafine magnesium hydroxide.

[0033] After measuring for 30 minutes, it is determined that the starting current is 0.31A, and the heating temperature is 125°C.

Embodiment 3

[0035] This example is the same as Example 1, except that in this example, 60 parts by weight of coupling agent, 323 parts by weight of melt inhibitor, 232 parts by weight of glass fiber, and 1255 parts by weight of matrix material HDPE-7000F are used as raw materials, and Example 1 is used. According to the preparation method in , the prepared copper core temperature heating tape sample is measured for 30 minutes and its starting current is 0.37A, and the heating temperature is 97°C.

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Abstract

The invention discloses a preparation method of a polymer-based PTC trace heating tape, and relates to the technical field of polymer-based PTC trace heating tapes. The method is as below: firstly modifying a reinforcing material alkali-free glass fiber by using a coupling agent; then conducting melt-blending on the modified reinforcing material, an HDPE matrix material, an ultrafine magnesium hydroxide flux inhibitor and a silane coupling agent; performing forming by die molding; cutting the molded polymer-based PTC trace heating tape into standard parts; and installing a copper core. The combination of hot pressing and cold pressing is used to form the trace heating tape. The prepared trace heating tape is free of fluorine, not only has excellent thermal properties, but also gains improved mechanical properties; the raw materials are inexpensive; and the preparation method is simple and can be widely used in petroleum, chemical engineering and other aspects.

Description

technical field [0001] The invention belongs to the technical field of polymer-based PTC heating tape materials, and particularly relates to a preparation method of a polymer-based PTC heating tape. Background technique [0002] PTC (Positive Temperature Coefficient) positive temperature coefficient thermistor is a kind of semiconductor resistance material with temperature sensitivity, which has the characteristic that the resistivity increases with the increase of temperature. In the past ten years, polymer-based PTC composite materials have been widely used, especially the important product of polymer-based PTC composite materials - polyethylene-based self-limiting temperature heating cable tape, which has many excellent properties that other traditional heating elements do not have. Performance, such as preventing overheating, saving electric energy, convenient use and maintenance, and easy automation, etc., are widely used in petroleum, chemical industry, home appliances,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/06C08K7/14C08K3/04C08K3/22
CPCC08K3/04C08K3/22C08K7/14C08K9/06C08K2003/2224C08K2201/001C08L23/06Y02P20/10
Inventor 孙益民高天铱江真星丁旭宋白雁刘梦婷
Owner ANHUI NORMAL UNIV
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