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Environment-friendly micro-nano foaming waterborne polyurethane synthetic leather and manufacturing method thereof

A water-based polyurethane, a technology for manufacturing methods, applied in textiles and papermaking, applications, road vehicles, etc., can solve the problems of volatile, DMF residue, non-cleaning, etc., and achieve good water vapor permeability, good air permeability, good hygiene performance and The effect of environmental performance

Active Publication Date: 2019-09-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These organic solvents are extremely volatile during the production process, seriously polluting the environment and posing a threat to the health of on-site operators
[0004] According to the above-mentioned traditional solvent-based production process, there is a serious environmental pollution problem in the production process, which is a non-clean production process
DMF residues are prone to occur in the obtained polyurethane synthetic leather, which is harmful to the human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) the water-based polyurethane is passed through the micro-nano bubble generator to form bubbles with a diameter of 150 nanometers in the water-based polyurethane, and the number of times the water-based polyurethane is controlled to pass through the micro-nano bubble generator is 5 times to obtain a bubble volume content between 30%. Micro-nano foaming water-based polyurethane A. Among them, the water-based polyurethane uses a water-based polyurethane dispersion with a solid content of 25%, and the gas used for foaming is air.

[0035] (2) Add 10 parts of calcium carbonate, 1 part of water-based color paste, 1 part of aziridine crosslinking agent and 1 part of polyurethane thickener to 100 parts of micro-nano foaming water-based polyurethane A to obtain micro-nano foaming water-based Polyurethane slurry B; the mesh number of calcium carbonate is 500 mesh.

[0036] (3) Micro-nano foamed water-based polyurethane slurry B is scraped onto the base cloth, and the gap bet...

Embodiment 2

[0039] (1) the water-based polyurethane is passed through the micro-nano bubble generator to form bubbles with a diameter of 500 nanometers in the water-based polyurethane, and the number of times the water-based polyurethane is controlled to pass through the micro-nano bubble generator is 15 times, and the bubble volume content obtained is between 100%. Micro-nano foaming water-based polyurethane A. Among them, the water-based polyurethane uses a water-based polyurethane emulsion with a solid content of 30%, and the gas used for foaming is oxygen.

[0040] (2) Add 30 parts of talc powder and 1 part of aziridine crosslinking agent to 100 parts of micro-nano foamed water-based polyurethane A to obtain micro-nano foamed water-based polyurethane slurry B; the mesh number of calcium carbonate is 800 mesh.

[0041] (3) The micro-nano foamed water-based polyurethane slurry B is scraped onto the base cloth, and the gap between the scraper and the base cloth is controlled at 0.3mm, an...

Embodiment 3

[0044] (1) The water-based polyurethane is passed through the micro-nano bubble generator to form bubbles with a diameter of 1 micron in the water-based polyurethane, and the number of times the water-based polyurethane is passed through the micro-nano bubble generator is 1 time to obtain a bubble volume content between 50%. Micro-nano foaming water-based polyurethane A. Among them, the water-based polyurethane uses a water-based polyurethane dispersion with a solid content of 35%, and the gas used for foaming is hydrogen.

[0045] (2) Add 50 parts of calcium carbonate, 3 parts of water-based color paste, 0.5 parts of aziridine crosslinking agent and 0.5 part of acrylic thickener to 100 parts of micro-nano foamed water-based polyurethane A to obtain micro-nano foamed water-based Polyurethane slurry B; the mesh number of calcium carbonate is 1000 mesh.

[0046] (3) Micro-nano foamed water-based polyurethane slurry B is scraped onto the base cloth, and the gap between the scrap...

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Abstract

The invention relates to the technical field of synthetic leather production, in particular to environment-friendly micro-nano foaming waterborne polyurethane synthetic leather and a manufacturing method thereof. The method comprises the following steps of (1) adopting waterborne polyurethane as a raw material and a micro-nano bubble generator for foaming to obtain micro-nano foaming waterborne polyurethane A; (2) adding a filler, a coloring agent, a cross-linking agent and a thickener into the micro-nano foaming waterborne polyurethane A to obtain micro-nano foaming waterborne polyurethane slurry B; (3) coating a basic cloth with the micro-nano foaming waterborne polyurethane slurry B, and then placing the basic cloth in a drying box for drying to obtain micro-nano foamed waterborne polyurethane bass C; (4) performing post-finishing process of synthetic leather on the micro-nano foamed waterborne polyurethane bass C to obtain the environmentally-friendly micro-nano foamed waterborne polyurethane synthetic leather. The obtained environment-friendly micro-nano foaming waterborne polyurethane synthetic leather has excellent sanitary performance and environmental protection performance.

Description

technical field [0001] The invention relates to the technical field of synthetic leather production, in particular to an environment-friendly micro-nano foamed water-based polyurethane synthetic leather and a manufacturing method thereof. Background technique [0002] Synthetic leather is a composite material that simulates the structure and performance of natural leather and can be used as a substitute for natural leather. Usually non-woven fabric is used to simulate the mesh layer, and microporous polyurethane coating is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. Widely used in making shoes, boots, bags and ball games. In 2014, the domestic consumption of synthetic leather was about 4.55 billion square meters, and its total production ranked first in the world. It is estimated that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0006D06N3/0009D06N3/0011D06N3/0047D06N3/0061D06N3/0063D06N3/0077D06N3/0088D06N3/14D06N2209/123D06N2211/106D06N2211/14D06N2211/261D06N2211/263D06N2211/28
Inventor 马兴元何远鑫吴晓珍贺营花
Owner SHAANXI UNIV OF SCI & TECH
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