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Polyurethane coated fabric and preparation method thereof

A polyurethane coating and fabric technology, which is applied in the field of polyester modification, can solve the problems of complicated dipping process and cost increase, achieve good interface bonding and improve use efficiency

Active Publication Date: 2015-04-08
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dipping treatment is a technical measure to activate the surface of polyester fabric and improve the interface bonding of coated fabrics, but the process of dipping treatment is complicated and the cost will be greatly increased

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Polyurethane coated fabric and preparation method thereof
  • Polyurethane coated fabric and preparation method thereof
  • Polyurethane coated fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] A preparation method of polyurethane coated fabric, comprising the following steps:

[0089] (1) Preparation of amino fatty acid ethylene glycol ester:

[0090] 1) Add dodecanedicarboxylic acid and methanol into the reactor at a molar ratio of 1:1.5, heat to 80°C under the catalysis of concentrated sulfuric acid, reflux for esterification, cool, separate and purify to obtain dodecanedicarboxylic acid Acid monomethyl ester; Described concentrated sulfuric acid refers to the sulfuric acid that mass concentration is 70%, and the concentrated sulfuric acid add-on is 3wt% of dodecane dicarboxylic acid;

[0091] 2) Dissolve the monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide in benzene (molar ratio 1:1:1), wherein the monomethyl dodecanedicarboxylate concentration is 0.05mol / L , under a nitrogen atmosphere, react at 80 ° C, reflux, when no more gas is produced, add a certain amount of dilute sulfuric acid to react for 2 hours, then wash, purify and dry ...

Embodiment 2

[0129] A preparation method of polyurethane coated fabric, comprising the following steps:

[0130] (1) Preparation of amino fatty acid ethylene glycol ester:

[0131] 1) Add pentacodecanedicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, under the catalysis of concentrated sulfuric acid, heat to 110°C, reflux for esterification, cool, separate and purify to obtain pentacodecane Dicarboxylic acid monomethyl ester; Described concentrated sulfuric acid refers to the sulfuric acid that mass concentration is 70%, and the concentrated sulfuric acid add-on is 3wt% of pentacosane dicarboxylic acid;

[0132] 2) The monomethyl pentacodecanedicarboxylate, lead tetraacetate and lithium bromide are dissolved in benzene (molar ratio 1:1:1), wherein the concentration of monomethyl pentacodecanedicarboxylate is 0.07mol / L, under nitrogen atmosphere, react at 85°C, reflux, when no more gas is generated, add a certain amount of dilute sulfuric acid to react for 3 hours...

Embodiment 3

[0170] A preparation method of polyurethane coated fabric, comprising the following steps:

[0171] (1) Preparation of amino fatty acid ethylene glycol ester:

[0172] 1) Add pentadecanedicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, under the catalysis of concentrated sulfuric acid, heat to 85°C, reflux for esterification, cool, separate and purify to obtain pentadecanedicarboxylic acid acid monomethyl ester; described concentrated sulfuric acid refers to the sulfuric acid that mass concentration is 70%, and the concentrated sulfuric acid add-on is 3wt% of pentadecanedicarboxylic acid;

[0173] 2) Dissolve the monomethyl pentadecanedicarboxylate, lead tetraacetate and lithium bromide in benzene (molar ratio 1:1:1), wherein the concentration of monomethyl pentadecanedicarboxylate is 0.08mol / L , under nitrogen atmosphere, react at 90°C, reflux, when no more gas is produced, add a certain amount of dilute sulfuric acid to react for 2.5 hours, then was...

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Abstract

The invention relates to a polyurethane coated fabric and a preparation method thereof. The polyurethane coated fabric comprises a fabric layer and a polyurethane coating, the warps and the wefts of the fabric layer are polyester industry yarns for the polyurethane coated fabric, the polyester industry yarns for the polyurethane coated fabric are made from modified polyester, the modified polyester is composed of polyester and aminoadipic acid gylcol ester, the aminoadipic acid gylcol ester is dispersed among molecular chains of the polyester, hydrogen-bond interaction exists between the aminoadipic acid gylcol ester and the molecular chains of the polyester, and the relative position of the aminoadipic acid gylcol ester and the molecular chains of the polyester is fixed; the free volume space among the molecular chains inside the fiber is increased by 20-40v / v% when the polyester industry yarns for the polyurethane coated fabric are at 100-150 DEG C, the polyurethane coated fabric and the polyurethane have good interface bonding effect, and the polyester industry yarns for the polyurethane coated fabric can be used for improving the appearance of the fabric.

Description

technical field [0001] The invention belongs to the technical field of polyester modification, and relates to a polyurethane coated fabric and a preparation method thereof. Background technique [0002] Since its appearance, polyethylene terephthalate (PET) fiber has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fibers in the world. Polyester fiber has a series of excellent properties such as high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and the fabric has the advantages of wrinkle resistance and good stiffness, so , Polyester fiber is widely used in clothing, industrial yarn and other fields. [0003] Polyester-TPU (thermoplastic polyurethane) coated fabric is a composite material made of polyester fabric as the base and TPU as the coating. Because of its advantages of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/86D01D5/08D01D5/088D01D7/00D06M15/564D06M101/32
Inventor 刘文斌明丹李文刚张富伟宋光坤
Owner JIANGSU HENGLI CHEM FIBER
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