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A kind of preparation method of conductive polyurethane light conveyor belt

A light conveyor belt and polyurethane technology, applied in polyurea/polyurethane coatings, conveyors, conductive coatings, etc., can solve the problems of material processing performance, reduction of material tensile strength and elongation at break, and large waste

Active Publication Date: 2021-09-28
SHANGHAI YONGLI TRANSPORTATION SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the manufacturing and processing environment of electronic equipment, static electricity is likely to be generated on the conveyor belt, which will adversely affect the quality of electronic products
[0003] The conventional method is to add conductive carbon black, conductive carbon nanotubes and other materials to polyurethane, and make conductive polyurethane through blending and granulation. This method has a lot of waste, and the utilization rate of conductive materials is not high. Conductive materials affect the subsequent processing of polyurethane and other shortcomings
For example, conductive carbon black needs to be added in a large amount (30-40%) to the material to have a certain conductive effect, but a large amount added will have a greater impact on the processing performance of the material, and will greatly reduce the material's performance. Tensile strength and elongation at break, while carbon nanotube materials are prone to agglomeration in polyurethane, which makes the surface resistance of the material uneven and also reduces the strength of the material

Method used

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  • A kind of preparation method of conductive polyurethane light conveyor belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Carboxymethylcellulose (CMC) is dissolved in water, and the concentration of the aqueous solution is 10%.

[0027] (2) Disperse the carbon nanotubes in the CMC aqueous solution at a concentration of 10%, and vibrate ultrasonically for 30 minutes.

[0028] (3) Add the CMC / carbon nanotube mixed liquid to the water-based polyurethane to configure the water-based polyurethane conductive liquid, and the ratio of the mixed liquid to the water-based polyurethane is 1:10.

[0029] (4) The polyester fabric is dried and shaped in a far-infrared heating oven at a drying temperature of 80°C.

[0030] (5) Use the calendering method to compound the TPU on the front and back of the fabric to form a composite layer of the conveyor belt; during the compounding process, the calendering temperature is 180°C, the compounding pressure is 10Pa, and the fabric surface temperature is always maintained at 150°C. The thickness of the composite layer is 0.3mm.

[0031] (6) Coating polyureth...

Embodiment 2

[0033] Use the calendering method to compound the TPU on the front and back of the fabric respectively to form a composite layer of the conveyor belt; during the compounding process, the calendering temperature is 180°C, the compounding pressure is 10Pa, and the fabric surface temperature is always kept at 150°C. Thickness 0.3mm. The specific test results are shown in Table 1.

Embodiment 3

[0035] (1) Fully mix 35% conductive carbon black with 65% TPU;

[0036] (2) Use the calendering method to compound the mixture obtained in (1) on the front and back sides of the fabric respectively to form a conveyor belt composite layer; It is always kept at 150°C, and the thickness of the composite layer is 0.3mm. The specific test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of conveyor belts in the electronics industry, and in particular relates to a preparation method of a conductive polyurethane light conveyor belt. The conveyor belt prepared by the method has good conductive effect, can lead out the electrostatic charge generated during the operation of the conveyor belt, and will not cause adverse effects on the processing of polyurethane. Carboxymethyl cellulose is a polymer material that can be dissolved in water. The cellulose molecules in water are inserted in the middle of carbon nanotubes, which can effectively prevent the aggregation of conductive materials and make them evenly dispersed in the system. The surface resistance of the conductive polyurethane light-duty conveyor belt obtained by this method reaches 10 3 Ω, and has almost no effect on the processing of polyurethane.

Description

technical field [0001] The invention belongs to the technical field of conveyor belts in the electronics industry, and in particular relates to a preparation method of a conductive polyurethane light conveyor belt. Background technique [0002] With the vigorous development of the electronic industry, the electronic equipment manufacturing industry has also developed, and this development has put forward higher requirements for the conveyor belt, which is an important equipment of the assembly line. TPU light conveyor belt generally uses polyester fabric as the skeleton material, and is mainly used for conveying light and medium quality items. TPU light conveyor belt is widely used in electronics manufacturing and processing industries due to its advantages of light weight, long life, easy installation, and less friction. However, in the manufacturing and processing environment of electronic equipment, static electricity is likely to be generated on the conveyor belt, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/044C09D175/04C09D5/24B65G15/34
CPCB65G15/34C08J7/042C08J2375/04C08J2475/04C08K2201/011C09D5/24C09D175/04C08L1/286C08K7/24
Inventor 范冰李柏旺
Owner SHANGHAI YONGLI TRANSPORTATION SYST CO LTD
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