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High-molecular composite nanometer voltage variable resistance soft film and manufacturing method

A high molecular polymer and polymer technology, applied in the direction of varistors, etc., can solve the problems of difficult to grasp the stability and reliability, poor corrosion resistance and oxidation resistance, and high brittleness of voltage rheostat materials, so as to achieve easy realization of functions Index, good electrical conductivity, excellent electrical conductivity

Active Publication Date: 2014-06-18
WUHAN CHIP PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the polymer voltage varistor materials used in the circuit protection of electronic products are mostly obtained by blending and melting high molecular polymers and metal or carbon powders. The resulting polymer voltage varistor materials have many advantages. Big limitations:
[0003] 1. Since the filler particles used are large (most of the particle size exceeds 30um), this requires a large amount of filler addition, and the resulting voltage rheostat material is highly brittle after curing, has poor mechanical strength, and is easy to break. no stretch ability
[0004] 2. The prepared products can only be slurry and cement, which can only be prepared and used immediately by coating, and discarded after drying, which is extremely inconvenient to use
[0005] 3. The solid shape and size have been determined before curing. Due to the difference in curing and the difference in particle size of conductive filler particles, it is difficult to grasp the stability and reliability
It is especially difficult to obtain a consistent clamping voltage
[0006] 4. Poor anti-corrosion and anti-oxidation ability, not resistant to aging

Method used

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  • High-molecular composite nanometer voltage variable resistance soft film and manufacturing method
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Experimental program
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Effect test

Embodiment

[0038] 1. The weight ratio is wherein the metallocene linear polyethylene accounts for 50% to 70% of the weight of the polymer matrix material. High-quality metallocene linear polyethylene (Enable mPE35-05) is blended with 30% to 50% low-density polyethylene (LDPE) to obtain a polymer matrix material. Preferably, metallocene linear polyethylene accounts for 55% to 65%.

[0039] 2. Add the epoxy resin with reactive groups with a weight ratio of 1-5% (preferably 3%) of the required nano-conductive filler to the high-speed mixer, and then add a weight ratio of 99%-95% (preferably 97% graphene) Nano-graphene (graphene powder with a particle size of 1.2nm, graphene nanosheets with a particle size of 0.5-20 um and a thickness of 5-20nm), stirring for 10 minutes, to form a 100 nm epoxy resin film on the surface of the graphene , to obtain nano conductive fillers.

[0040] The conductive particles of the nano-conductive filler obtained in this way can form a uniform and effective ...

example 1

[0043] Example 1. Add 100 parts of polymer matrix materials and 3 parts of nano-conductive fillers into a Haake brand torque rheometer, and banbury for 10 minutes at a processing temperature of 160 ° C and a rotor speed of 64 rpm to obtain a polymer composite nano-voltage transformer. Preheat the material at 160°C for 15 minutes on a 15MPa press, then hot press for 10 minutes, and then cold press for 5 minutes to make a polymer composite nano soft film with a thickness of 50um to 200um. Then the electrical and mechanical properties of the soft film were tested, and the results are listed in Table 1-Table 3.

example 2

[0044]Example 2. Add 100 parts of polymer matrix materials and 5.5 parts of nano-conductive fillers to a Haake brand torque rheometer, and banbury for 10 minutes at a processing temperature of 160 ° C and a rotor speed of 64 rpm to obtain a polymer composite nano-voltage transformer. Preheat the material at 160°C for 15 minutes on a 15MPa press, then hot-press for 10 minutes, and then cold-press for 5 minutes to make a polymer composite nano voltage varistor soft film with a thickness of 50um to 200um. Then cut into certain specifications and sizes, and pack for use.

[0045] The polymer composite nano voltage varistor soft film has nonlinear voltage mutagenic resistance characteristics, and its volume resistivity is very high when no voltage is applied to the two ends of the soft film or the applied voltage does not reach the resistance change threshold of the soft film (>10 6 Ωcm), when the voltage applied to both ends of the soft film reaches its resistance change threshol...

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Abstract

The invention provides a high-molecular composite nanometer voltage variable resistance soft film and a manufacturing method, the manufacturing method is characterized in that 100 parts of mixed high-molecular matrix material composed of metallocene linear polyethylene and low density polyethylene is subjected to melt blending with 3-15 parts of nano graphene conductive filler which is subjected to anchoring polymerization modification through polyurethane with a reactive group or epoxy resin surface modifier, and the soft film with thickness of 50mum-200mum is obtained through hot-melt calendaring and cold pressing fixing. The high-molecular composite nanometer voltage variable resistance soft film has a corresponding threshold value relationship with voltage applied on the soft film, when the voltage applied at two ends of the film is a specific value, the soft film is conversed to a conductor through mutation of an insulator, and the voltage specific value can be determined during the production of the soft film. The film of the present invention has the advantages of flexibility, high mechanical strength, corrosion resistance, antioxidation, high stiffness, impact resistance and tearing resistance, the vertical and horizontal tensile force is equalized, and the size of the shape can be cut according to requirements at random.

Description

technical field [0001] The invention relates to a polymer composite nano voltage variable resistance soft film and a manufacturing method thereof, which provides a practical raw material with more stable performance, simpler realization and more convenient use for the technical field of electronic equipment and component protection. Background technique [0002] At present, the polymer voltage varistor materials used in the circuit protection of electronic products are mostly obtained by blending and melting high molecular polymers and metal or carbon powders. The resulting polymer voltage varistor materials have many advantages. Big limitations: [0003] 1. Since the filler particles used are large (most of the particle size exceeds 30um), this requires a large amount of filler addition, and the resulting voltage rheostat material is highly brittle after curing, has poor mechanical strength, and is easy to break. Does not have the ability to stretch. [0004] 2. The prepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K9/04C08K3/04H01C7/10
Inventor 王晶乔治蔡峰
Owner WUHAN CHIP PROTECTION TECH