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Liquid adhesive coating method and coating device on rubber particle surface

A technology of rubber particles and adhesives, which is applied in the direction of surface coating liquid devices, liquid injection devices, spray devices, etc., can solve the problem that there is no relevant literature report, and it is difficult to control the thickness and uniformity of adhesive coating. , Reduce concrete strength and other issues, to achieve the effect of ensuring uniformity and integrity of coating, easy control of coating thickness, and improving work efficiency

Active Publication Date: 2020-04-10
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can coat the interface agent on the surface of the rubber, it still has the following defects: one is that the adhesive is directly coated on the surface of the rubber particles, and when the glue is cured, the rubber particles will be bonded Together, form a large block or bond into a whole, which will cause the rubber particles to be unable to be used normally, restricting the application of rubber particles in cement concrete
The second is that this method of dissolving the binder first and then putting the rubber particles in will inevitably make it difficult to control the thickness and uniformity of the binder coating on the surface of the rubber particles. If the coating is too thin or the coating is uneven, the The bonding force of cement gelling material to rubber particles is not uniform, and those parts with less bonding force will affect the overall strength of rubber concrete
The third is that the rubber particles treated by this method are easy to stick to each other, resulting in the incomplete phenomenon of the processed rubber particles, and if the incomplete rubber particles are used as aggregates, when mixed with other raw materials such as cement, etc., it will cause air bubbles in the concrete , but will reduce the strength of concrete
[0006] Therefore, there is no better method suitable for rubber particle coating on the market at present, and there is no relevant literature report in this regard

Method used

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  • Liquid adhesive coating method and coating device on rubber particle surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Take the example of coating acrylic emulsion on the surface of rubber particles as an example.

[0049] Mix the acrylic emulsion with a solid content of 45% to 50% with water at a ratio of 4: (1 to 1.5) (volume ratio), add an appropriate amount of defoamer, mix evenly, and place it in the glue storage tank 1.

[0050] Put the rubber particles in the glue applicator turntable 4, open the glue applicator turntable 4 and the glue applicator nozzle 3, and at the same time apply pressure to the glue storage tank 1 through the air inlet of the glue storage tank 1, and the acrylic emulsion is sprayed from the discharge port at the bottom of the tank. After the rubber particles are evenly covered with acrylic emulsion, they are sent to the drying oven. Turn on the hot air of the drying furnace, control the temperature of the hot air within the curing temperature range of the acrylic emulsion, and make the inclined baffle 7 in a vibrating state, so that the rubber particles coat...

Embodiment 2

[0053] Example 2 takes the example of coating a two-component epoxy resin adhesive on the surface of rubber particles as an example for specific illustration.

[0054] The gluing method of Example 2 is basically the same as that of Example 1. The difference is that when the epoxy resin and curing agent of Example 2 are used, they need to be weighed and poured into the storage tank 1 according to the proportion requirements on the spot and mixed evenly. Do not mix in advance and then reserve, otherwise it will be cured in advance. The hot air temperature is also selected within the curing temperature range of the two-component epoxy resin adhesive.

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Abstract

The invention discloses a method and coating device for coating liquid adhesive on the surface of rubber particles. It mainly places the rubber particles on a glue coating turntable, sprays adhesive on the surface of the rubber particles by spraying, and then sprays the adhesive on the surface of the rubber particles. The rubber particles after coating are dried. During drying, the rubber particles after coating are sent to a hot air drying furnace. The inside of the drying furnace is separated by inclined partitions with slits. The inclined partitions are vibrated The motor vibrates and at the same time sends hot air from the lower part of the inclined partition. The hot air enters through the slit of the inclined partition. When the rubber particles move from the head to the end of the drying furnace, the glue on the surface of the particles can be completely solidified and lost. Adhesion performance; finally, the dried rubber particles are collected in a storage bin for later use. The invention not only realizes the industrialization of coating adhesive on the surface of rubber particles, but also further improves the bonding performance between rubber particles and cement. It also provides a way for other solid particles to be coated with adhesives on their surfaces.

Description

Technical field [0001] The invention relates to a method for surface treatment of solid particles, in particular to a method of coating adhesive on the surface of rubber particles. Background technique [0002] With the rapid development of the global industrial economy and the increasing number of automobiles, a large number of scrap automobile tires are eliminated around the world every year. According to relevant statistics, only 15%-20% of waste tires can be recycled, and most of the remaining waste tires are burned as fuel or piled up, causing considerable environmental pollution. How to deal with the increasing number of waste tires has become a worldwide problem. [0003] With the development of science and technology, many methods of treating waste tires have emerged. The main component of scrap tires is rubber. Since rubber products have good deformation properties, waste tires can be processed into rubber particles of different particle sizes and added to cement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05B7/04B05B13/02B05D3/04B05D7/24C08J7/04C09D133/00C09D163/00C08L21/00
CPCB05B7/0416B05B13/0257B05D3/0413B05D7/24B05D2502/00B05D2503/00B05D2504/00B05D2518/00C08J7/04C08J2321/00C08J2433/00C08J2463/00C09D133/00C09D163/00
Inventor 王立华陈志成牟俊杰周长汶
Owner SHANDONG UNIV OF SCI & TECH