Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Macromolecular PTC composite material with crystalline polymer as matrix

A crystalline polymer and composite material technology, applied in the field of polymer PTC composite materials, can solve the problems of difficult processing and molding, high room temperature resistivity, high manufacturing cost, and achieve excellent PTC performance, excellent electrical conductivity, and improved PTC strength. Effect

Inactive Publication Date: 2014-02-05
ANHUI PRINTING MECHANICAL & ELECTRICAL
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application is greatly limited due to its hardness and brittleness, high room temperature resistivity, high service temperature, difficult processing and high manufacturing cost.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition of preparing polymer PTC composite material is:

[0029] (a) The volume fraction of crystalline polymer is 60%, the melting temperature is 135°C and the density is 0.952g / cm 3 high-density polyethylene;

[0030] (b) Conductive filler, with a volume fraction of 38%, a particle size of less than 10 μm, and a volume resistivity of 42 μΩ.cm; the coupling agent is monoalkoxy isopropyl dioleate acyloxy titanate, and the density is 0.976 g / cm 3 ;

[0031] (c) Additives, including antioxidant tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester and lubricant polyethylene wax, the volume fraction is 2%.

[0032] The preparation steps are as follows:

[0033] (1) According to the mass ratio of 100:1, put the carbon black into the isopropanol solution of the coupling agent, evaporate the solvent in the oven after ball milling for 2 hours, and then react in the vacuum oven to obtain the carbon black conductive filler;

[0034] (2) We...

Embodiment 2

[0037] The composition of preparing polymer PTC composite material is:

[0038] (a) The volume fraction of crystalline polymer is 60%, the melting temperature is 135°C and the density is 0.952g / cm 3 high-density polyethylene;

[0039] (b) Conductive filler, the volume fraction is 38%, the particle size is less than 10 μm, and the volume resistivity is 42 μΩ.cm; the coupling agent is a chelating titanate coupling agent, and the density is 0.952 g / cm 3 ;

[0040] (c) Additives, including antioxidant tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester and lubricant polyethylene wax, the volume fraction is 2%.

[0041] The preparation steps are as follows:

[0042] (1) According to the mass ratio of 100:1, put the carbon black into the isopropanol solution of the coupling agent, evaporate the solvent in the oven after ball milling for 2 hours, and then react in the vacuum oven to obtain the carbon black conductive filler;

[0043] (2) Weigh the cry...

Embodiment 3

[0046] The composition of preparing polymer PTC composite material is:

[0047] (a) The volume fraction of crystalline polymer is 60%, the melting temperature is 135°C and the density is 0.952g / cm 3 high-density polyethylene;

[0048] (b) Conductive filler, with a volume fraction of 38%, a particle size of less than 10 μm, and a volume resistivity of 42 μΩ.cm; the coupling agent is a 1:1 monoalkoxy titanate coupling agent, monoalkoxy Pyrophosphate type titanate coupling agent;

[0049] (c) Additives, including antioxidant tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester and lubricant polyethylene wax, the volume fraction is 2%.

[0050] The preparation steps are as follows:

[0051] (1) According to the mass ratio of 100:1, put the carbon black into the isopropanol solution of the coupling agent, evaporate the solvent in the oven after ball milling for 2 hours, and then react in the vacuum oven to obtain the carbon black conductive filler;

[...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Melting temperatureaaaaaaaaaa
Densityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a macromolecular PTC composite material with a crystalline polymer as the matrix. The PTC composite material comprises, by volume: (a) 40-70% of a thermoplastic polymer, i.e. a crystalline polymer substrate; (b) 30-60% of conductive filler: and (c) 1-5% of additives. The composite material provided by the invention has excellent electrical conductivity and PTC performance, and national standard tests prove that the tensile properties, bending properties and oil immersion aging performance and the like all do not show a downward trend. An automatic temperature control type heating cable prepared from the composite material provided by the invention is especially suitable for antifreezing thermal insulation and temperature limited heating of chemical and petroleum pipelines, valves, monitoring and inspection instruments and for fluid flow promotion.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a polymer PTC composite material with a crystalline polymer as a matrix. technical background [0002] PTC material is a conductive heat-sensitive material with a positive temperature coefficient. In a narrow temperature range, the resistivity of the material will increase sharply with the increase of temperature (can increase by 1.5 to 1.8 orders of magnitude). That is, there is a temperature at which its conductivity changes dramatically (Curie temperature Tc, below this temperature it has the characteristics of a semiconductor, but above this temperature it turns into an insulator). The self-controlled heating element made by using this characteristic can heat up rapidly after a certain AC or DC voltage is applied, and the resistance also increases rapidly, and remains constant at a predetermined temperature, thus having a temperature adjustment...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L23/06C08L63/00C08L23/12C08L27/16C08L23/08C08L33/12C08K9/04C08K3/04
CPCC08L23/06C08K2201/001C08L23/0853C08L23/0869C08L23/12C08L27/16C08L33/12C08L63/00C08L2203/20C08L2205/025C08L2205/03C08L2205/035C08L2207/062C08K9/04C08K3/04
Inventor 黄长乐
Owner ANHUI PRINTING MECHANICAL & ELECTRICAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com