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A kind of low abrasion conductive PBT/PET composite material and preparation method thereof

A composite material and low-abrasion technology, which is applied in the field of low-abrasion carbon nanotube conductive PBT/PET composite material and its preparation, can solve the problem that the surface treatment and dispersion of carbon nanotubes are not involved, the specific surface area of ​​carbon nanotubes is large, and the composition is not easy. Uniform dispersion and other problems, to achieve the effect of good electrical conductivity, good mechanical properties, and small amount of addition

Active Publication Date: 2019-03-22
浙江通力新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the components are not easy to disperse evenly and are prone to agglomeration
Carbon nanotubes have a large specific surface area, high surface energy, and are very easy to agglomerate, which greatly limits its application.
[0006] CN102532823A discloses an antistatic PBT material, including PBT, glass fibers, carbon nanotubes, antioxidants, lubricants, and toughening agents. This patent does not involve the surface treatment and dispersion of carbon nanotubes
[0008] CN102675836A discloses a method for preparing a conductive / antistatic polyester PET composite material. The patent uses conductive powder carbon nanotubes and aniline and PET pellets for solution blending to prepare a conductive / antistatic polyester PET composite material. However, solution blending is only suitable for the preparation of a small amount of composite materials and is not suitable for large-scale production

Method used

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  • A kind of low abrasion conductive PBT/PET composite material and preparation method thereof
  • A kind of low abrasion conductive PBT/PET composite material and preparation method thereof
  • A kind of low abrasion conductive PBT/PET composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) According to PBT 84.6%, PET 5%, treated carbon nanotubes 3.5%, barium sulfate 6%, nucleating agent 0.2%, antioxidant 1010 0.2%, antioxidant 168 0.2% and dispersant 0.3% After accurate weighing, pre-dry at 85-90°C;

[0025] (2) Add the above-mentioned dried materials into a high-speed mixer for dry mixing for 1 to 4 minutes, then put the mixed materials into a twin-screw extruder, melt and extrude through the twin-screw extruder, cool, dry, and pelletize to obtain the finished product . The barrel temperature of the extruder is 200-230° C., and the screw speed is 300 rpm. The preparation steps of the second embodiment are the same as the first embodiment, and the formula is: 90.6% of PBT, 5% of PET, 3.5% of the treated carbon nanotubes, 0.2% of the nucleating agent, 0.2% of the antioxidant 1010, and 0.2% of the antioxidant 168 and dispersant 0.3%.

Embodiment 3

[0027] The preparation steps are the same as in Example 1, and the formula is: PBT 84.1%, PET 5%, treated carbon nanotubes 4%, barium sulfate 6%, nucleating agent 0.2%, antioxidant 1010 0.2%, antioxidant 168 0.2% and dispersant 0.3%.

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Abstract

The invention discloses a low-wear conductive PBT / PET (Polybutylece Terephthalate / Polyethylene Terephthalate) composite material and a preparation method thereof. The preparation method comprises the following steps: taking the PBT and the PET as base materials; adding a treated carbon nanotube, a nucleating agent, a primary antioxidant, an auxiliary antioxidant, a dispersing agent and a filter; mixing in a high speed mixer; placing the mixture into a dual-screw extruder for smelting, extruding and granulating to obtain the low-wear conductive PBT / PET composite material, wherein the carbon nanotube is pretreated through a treatment agent. The composite material has the advantages of low specific resistance, smooth surface, avoidance of falling of black powder, wear resistance and the like besides the characteristics of high temperature resistance and high mechanical performance of a PBT / PET alloy, can be applied to feeding and blanking frames of an SMT (Surface Mount Technology), can be applied to anti-electrostatic turnover boxes and trays, and can be applied to shells and structural members of electric appliances under the occasions of coal mines, oil ships, dust and combustible gas.

Description

technical field [0001] The invention relates to the technical field of carbon nanotube conductive composite materials, in particular to a low-wear carbon nanotube conductive PBT / PET composite material and a preparation method thereof. Background technique [0002] SMT loading and unloading racks are widely used in automatic loading and unloading machines. They can be used to hold PCB boards. They are easy to clean, easy to turn over circuit boards, neatly stacked, and easy to manage. In the past, BMC was used as raw material for SMT loading and unloading racks, but it was not environmentally friendly. At present, the raw materials of SMT loading and unloading racks widely used in the market include carbon fiber reinforced ABS from Japan's Panasonic and Asahi Kasei, and HIPS filled with conductive carbon black from Japan's NIKKO-RACK. However, the temperature resistance of these materials is below 110°C, and the conductive fillers will peel off and fall off during long-term ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K13/06C08K9/06C08K7/24C08K3/30C08K5/134C08K5/526
CPCC08K2201/011C08L67/02C08L2201/04C08L2201/08C08L2203/20C08L2205/025C08L2205/24C08K13/06C08K9/06C08K7/24C08K2003/3045C08K5/1345C08K5/526
Inventor 王炳植
Owner 浙江通力新材料科技股份有限公司
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