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Method for processing hot melt adhesive waste products into raw material

A hot-melt adhesive and raw material technology, applied in plastic recycling, recycling technology, etc., can solve problems such as air pollution, molecular structure damage, and toxic gases that are uncomfortable to humans, and achieve the effect of convenient grinding and simple operation

Inactive Publication Date: 2012-10-24
DONGGUAN FANGYAN PLASTIC TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the scraps of waste hot melt adhesives that are recycled are mainly crushed and then directly granulated at high temperature. This processing technology seriously damages the molecular structure of the material and produces toxic gases that cause discomfort to humans and air pollution. The material cannot be used repeatedly.

Method used

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  • Method for processing hot melt adhesive waste products into raw material

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0017] from figure 1 It can be seen from the figure that the first step after recycling hot melt adhesive waste is crushing, that is, crushing the recovered hot melt adhesive waste into less than 20 cm; The thread of the hot-melt adhesive waste less than one centimeter is separated from the hot-melt adhesive, and basically only the pure hot-melt adhesive waste material is retained. The thread removal step can be manually removed, but the efficiency of manual thread removal is relatively low. If you want to improve the efficiency, you can also Delineation can be carried out by using a delineation machine; then enter the cryogenic step, add liquid nitrogen to the hot melt adhesive after crushing and delineation, and let the hot melt adhesive be cryogenically below -145°C to make it brittle;...

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Abstract

The invention relates to a method for processing hot melt adhesive waste products into raw material. The method comprises the following steps of: 1) crushing: crushing the recycled hot melt adhesive waste products to below 20cm; 2) removing lines: separating the lines of the hot melt adhesive waste products crushed to below 20cm from hot melt adhesive; 3) performing deep cooling: performing the deep cooling on the separated hot melt adhesive to below minus 145 DEG C; 4) milling: milling the hot melt adhesive after deep cooling to powder particles in the size of 30 meshes to 60 meshes; 5) adding an injection agent: adding zinc stearate onto the powder particles of the hot melt adhesive; and 6) performing hot-pressing to form the raw material: performing the hot-pressing on the powder particles of the hot melt adhesive with the added zinc stearate to form a hot melt adhesive plate. The hot melt adhesive is further milled to the powder particles after deep cooling, so that the hot melt adhesive can become crisp to facilitate the milling, and the purpose of preventing a milling machine from being damaged is also achieved; furthermore, the molecular structure of the hot melt adhesive can be prevented from being damaged; and simultaneously, the production of toxic gas can be avoided, air pollution can be further avoided, and the hot melt adhesive waste products can be continuously recycled.

Description

technical field [0001] The invention relates to a method for processing recovered hot-melt adhesive waste products into raw materials, in particular to a simple, practical and easy-to-operate method for processing hot-melt adhesive waste products into raw materials. Background technique [0002] At present, the scraps of waste hot melt adhesives that are recycled are mainly crushed and then directly granulated at high temperature. This processing technology seriously damages the molecular structure of the material and produces toxic gases that cause discomfort to humans and air pollution. The material cannot be used repeatedly. . Contents of the invention [0003] Aiming at the defects of the prior art, the invention provides a simple, practical, green and environment-friendly method for processing waste hot melt adhesives into raw materials. [0004] A method for processing hot melt adhesive waste products into raw materials of the present invention comprises the followi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00
CPCY02W30/62
Inventor 向爱华
Owner DONGGUAN FANGYAN PLASTIC TECH
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