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A kind of polyurethane hot melt adhesive for seamless integrated shoe upper and preparation method thereof

A polyurethane hot-melt adhesive and shoe upper technology, which is applied in the field of polyurethane hot-melt adhesive, can solve problems affecting the flatness of the edge of the shoe edge, the fit between the sole and the upper, complex design and process of the upper, and lowering the grade of leather shoes. Achieve the effect of saving production process, simple and easy preparation method, and reducing sewing machine personnel

Active Publication Date: 2016-08-24
东莞宏石功能材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional shoemaking process is to realize the combination of materials by sewing machines. For example, the upper processing of leather shoes is generally to first cut the leather into a plane, and then stitch and stitch the side or heel to form a complete upper. This upper forming method Will leave a longitudinal seam on the side or heel of the upper, which will easily affect the flatness of the edge of the shoe and the fit between the sole and the upper, and reduce the grade of leather shoes, and more sewing machines are required. And the process is complicated, and it takes a lot of manpower and material resources to complete the production of shoes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of the polyurethane hot-melt adhesive that is used for seamless integrated vamp of the present embodiment, it comprises following preparation steps:

[0039] a, the parts by weight are 60 parts of polyester polyol, 15 parts of 4,4-MDI, 15 parts of 2,4-MDI, 0.4 parts of ethylene glycol, 0.6 parts of propylene glycol, 0.2 parts of 1, 3-butanediol, 0.5 parts of 1,4-butanediol, 0.3 parts of 2-methyl-1,3-propanediol, and 0.1 parts of Tinuvin 571 are sent to the twin-screw extruder for reaction at high temperature. The temperature of the screw extruder is 200°C, and granulation is carried out in water at the same time, and the temperature of the water is 15°C to obtain polyurethane granules;

[0040] Among them, the polyester polyol is made of a mixture of succinic acid, adipic acid and ethylene glycol, 1,3-butanediol, and 1,4-butanediol in a molar ratio of 1.03:1 through a vacuum melting method. It is formed by dealcoholization and dehydration polycon...

Embodiment 2

[0043] The preparation method of the polyurethane hot-melt adhesive that is used for seamless integrated vamp of the present embodiment, it comprises following preparation steps:

[0044] a, the parts by weight are 70 parts of polyester polyol, 12 parts of MDI-50, 16 parts of H 12 MDI, 1 part of hexanediol, 1 part of 3-methyl-1,5-pentanediol, 0.4 part of 1,4-cyclohexanedimethanol, 0.6 part of hydroquinone bis(2-hydroxy Ethyl) ether and 0.5 parts of Tinuvin 571 are sent to the twin-screw extruder for reaction at high temperature. The temperature of the twin-screw extruder is 225°C, and at the same time, it is granulated in water. The temperature of the water is 12°C to obtain polyurethane Colloidal particles;

[0045] Among them, the polyester polyol is a mixture of azelaic acid, sebacic acid and diethylene glycol, neopentyl glycol, 2-methyl-1,3-propanediol according to the molar ratio of 1.14:1 through the vacuum melting method It is formed by dealcoholization and dehydratio...

Embodiment 3

[0048] The preparation method of the polyurethane hot-melt adhesive that is used for seamless integrated vamp of the present embodiment, it comprises following preparation steps:

[0049] A, be the polyester polyol of 80 parts by weight, the HDI of 6 parts, the XDI of 8 parts, the IPDI of 12 parts, the 4-hydroxyethyloxyethyl-1-hydroxyethyl phenylene ether of 1 part, 1 part of resorcinol-bis(β-hydroxyethyl) ether, 2 parts of 3-hydroxyethyloxyethyl-1-hydroxyethyl phenylene ether, and 1 part of Tinuvin 571 are sent to twin-screw extrusion The extruder reacts at high temperature, the temperature of the twin-screw extruder is 250°C, and at the same time, it is granulated in water, and the temperature of the water is 10°C to obtain polyurethane granules;

[0050]Among them, polyester polyol is a mixture of sebacic acid, terephthalic acid, phthalic anhydride and hexanediol, 3-methyl-1,5-pentanediol, 1,4-cyclohexanedimethanol, glycerin The mixture is formed by dealcoholization and de...

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Abstract

The invention relates to the technical field of polyurethane hot-melt adhesives, in particular to a polyurethane hot-melt adhesive for seamlessly integrated shoe uppers and a preparation method thereof. The polyurethane hot-melt adhesive of the present invention is composed of 60-90 parts by weight of polyester Polyol, 20-30 parts of diisocyanate, 2-5 parts of chain extender, 0.1-2 parts of anti-aging additive; the polyurethane hot melt adhesive of the present invention has high-strength adhesive properties, and can be used for leather, Materials such as flocking and mesh cloth or other materials are bonded by thermal fusion to facilitate the realization of seamless integrated shoemaking technology, so that the bonding between the uppers is very firm and stable, and the appearance is more beautiful, and polyurethane thermal fusion The glue has a low melting point, good fluidity in a hot-melt state, good film-forming properties, excellent resistance to cold and twists, the glue film feels soft, and can also greatly reduce the number of sewing workers, save production processes, and reduce production costs; the preparation method of the present invention Simple and mature, high production efficiency, conducive to popularization and application.

Description

technical field [0001] The invention relates to the technical field of polyurethane hot-melt adhesives, in particular to a polyurethane hot-melt adhesive for seamlessly integrated shoe uppers and a preparation method thereof. Background technique [0002] Shoes are a necessity that people wear every day in daily life. The modern shoemaking industry is developing rapidly, and the shoemaking technology is changing with each passing day. The traditional shoe-making process is to realize the combination of materials by sewing machines. For example, the upper processing of leather shoes is generally to first cut the leather into a plane, and then stitch and stitch the side or heel to form a complete upper. This upper forming method Will leave a longitudinal seam on the side or heel of the upper, which will easily affect the flatness of the edge of the shoe and the fit between the sole and the upper, and reduce the grade of leather shoes, and more sewing machines are required. An...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J7/00C08G18/66C08G18/42C08G18/32
Inventor 刘山荣刘殷良
Owner 东莞宏石功能材料科技有限公司