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Flowing powder hot-melt adhesive and preparation method thereof

A hot-melt adhesive and fluidity technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of long product turnover cycle, high requirements for sealed storage, long product inventory time, etc., to achieve Improve storage stability and use effect, wide application, increase fluidity effect

Active Publication Date: 2017-11-24
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this will cause a series of problems such as long product inventory time, high requirements for sealed storage, high cost, and long product turnover cycle.

Method used

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  • Flowing powder hot-melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Proportion powder resin and leveling agent according to Table 1, taking powder resin with a particle size of less than 80 μm as an example. Weigh 248.75kg of EVA powder resin and 1.25kg of leveling agent, 250kg in total. First add the powdered resin to the conical agitator, turn on the agitator, and control the leveling agent within 15 minutes. After continuing to mix for 15 minutes, stop stirring, and discharge the bag and seal it. The loose bulk density before and after adding the leveling agent is: 0.58g / cm 3 , 0.36 g / cm 3 .

Embodiment 2

[0022] According to the ratio of powder resin and leveling agent in Table 1, take powder resin with a particle size of 80-200 μm as an example. Weigh 249.25kg of COPA powder resin and 0.75kg of leveling agent, 250kg in total. First add the powdered resin to the conical agitator, turn on the agitator, and control the leveling agent within 15 minutes. After continuing to mix for 15 minutes, stop stirring, and discharge the bag and seal it. The loose bulk density before and after adding the leveling agent is: 0.79g / cm 3 , 0.53 g / cm 3 .

Embodiment 3

[0024] Proportion powder resin and leveling agent according to Table 1, taking powder resin with a particle size of 200-500 μm as an example. Weigh 249.25kg of TPU powder resin and 0.75kg of leveling agent, 250kg in total. First add the powdered resin to the conical agitator, turn on the agitator, and control the leveling agent within 15 minutes. After continuing to mix for 15 minutes, stop stirring, and discharge the bag and seal it. The loose bulk density before and after adding the leveling agent is: 0.68g / cm 3 , 0.45g / cm 3 .

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Abstract

The invention discloses a flowing powder hot-melt adhesive and a preparation method thereof, the well-flowing powder hot-melt adhesive is prepared by addition of a surface-positively-charged powdery nano-oxide, the surface static electricity of the powder hot-melt adhesive is reduced, looseness and liquidity of the hot-melt adhesive powder can be improved, the easy agglomeration defect caused by long-term accumulation storage of the hot melt adhesive powder can be overcome, the storage stability and the use effect of the product can be improved, and the added surface-positively-charged powdery nano-oxide can fill up defects on the surface of resin powder particles, and increases the fluidity of the hot-melt adhesive powder, so that in a subsequent process, the flowing powder hot-melt adhesive can smoothly discharge powder, and the flowing powder hot-melt adhesive can be uniformly spread on the surface of a material to be bonded. The flowing powder hot-melt adhesive can be widely applied in garment materials, automotive interiors and other aspects, and is in line with use requirements of downstream manufacturers.

Description

technical field [0001] The invention specifically relates to the technical field of hot melt adhesives, in particular to a flowable powder hot melt adhesive and a preparation method thereof. Background technique [0002] Powdered hot melt adhesive or hot melt adhesive powder is a fine particle obtained by cryogenically crushing resin with liquid nitrogen. The resin used generally includes ethylene-vinyl acetate copolymer (EVA), copolyamide (COPA), polyurethane (TPU), polyester (PES), copolyester (COPES) or polyolefin (POE), etc. Powdered hot melt adhesives are generally stored in bags for handling, transportation, feeding, etc. [0003] Due to the small particles and large specific surface area of ​​powdery hot melt adhesive, it is easy to rub against each other during transfer, transportation or storage to generate static electricity, resulting in agglomeration, agglomeration, decreased looseness, difficulty in dispersion, and poor fluidity. As a result, when downstream m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J177/00C09J175/04C09J167/00C09J123/00C09J11/04
CPCC08K2003/222C08K2003/2272C08K2201/011C09J11/04C09J123/00C09J123/0853C09J167/00C09J175/04C09J177/00
Inventor 张伟禄蒋君芝张晓霞张鸿人张鸿慧徐胜军齐志敏
Owner WENZHOU UNIVERSITY