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Polyurethane hot melt adhesive and preparation method thereof for seamless integrated vamps

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

Active Publication Date: 2014-12-17
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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  • Polyurethane hot melt adhesive and preparation method thereof for seamless integrated vamps

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Experimental program
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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-hydroxyethyl Base) ether, 0.5 parts of Tinuvin 571 are transported 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, and the polyurethane glue is obtained. grain;

[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...

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, the polyester polyol is a mixture of sebacic acid, terephthalic acid, phthalic anhydride, hexanediol, 3-methyl 1,5-pentanediol, 1,4-cyclohexanedimethanol, and glycerin According to the molar ratio of 1.25:1, it ...

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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 and a preparation method thereof for seamless integrated vamps. The polyurethane hot melt adhesive comprises, by weight, 60-90 parts of polyester polyol, 20-30 parts of diisocyanate, 2-5 parts of chain extenders and 0.1-2 parts of anti-aging auxiliaries. The polyurethane hot melt adhesive has the advantages that the high-strength bonding characteristic is achieved, materials such as leather and flocking materials can be connected with mesh cloth or other materials in a thermal fusing mode, thereby, seamless integrated shoe making technology can be achieved, bonding between the vamps is quite firm and stable, the appearance is attractive, the melting point of the polyurethane hot melt adhesive is low, the fluidity is good at the hot melting state, the film-forming property is good, cold resistance and bending resistance are good, an adhesive film touches soft, sewing machine staff can be greatly reduced, production processes are reduced, and the production costs are lowered. The preparation method is simple and mature, the production efficiency is high, and general popularization and application can be facilitated.

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 Applications(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
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