Formula and process for producing ecological synthetic leather by adopting waterborne polyurethane foaming coating

A water-based polyurethane and foam coating technology, applied in textiles and papermaking, can solve the problems of difficult controllability of the production process, high energy consumption in drying, and environmental pollution at the product end, so as to save energy consumption in drying and Water resources, good peel fastness, soft and plump hand feeling

Inactive Publication Date: 2016-03-30
宋金火
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These solvents cannot be completely recovered at present, not only causing environmental pollution on the product side, but also seriously endangering the health of employees during the production process
[0004] There are two types of synthetic leather currently on the market: oily and water-based. Oil-based synthetic leather is being phased out due to the use of a large amount of solvents. There is also a so-called water-based synthetic leather production process that uses water-based polyurethane first on the leather base cloth. Carry out coating, and then solidify and solidify in water c

Method used

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  • Formula and process for producing ecological synthetic leather by adopting waterborne polyurethane foaming coating
  • Formula and process for producing ecological synthetic leather by adopting waterborne polyurethane foaming coating
  • Formula and process for producing ecological synthetic leather by adopting waterborne polyurethane foaming coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare the coating solution according to the following ratio:

[0035]

[0036] Add the raw materials except the thickener in the prescribed amount in sequence in the container, stir evenly with a disperser mixer, the stirring speed of the disperser mixer is 1200 rpm, after filtering, add the thickener to adjust the viscosity to obtain a coating liquid.

[0037] The prepared coating solution is made into a 5-fold coating foam through an intelligent dynamic foam generator, and then the coating foam is applied to the leather base cloth. The coating method is knife coating, roller coating or roller coating. The application amount is precisely controlled by the computer, and the application thickness is adjusted according to the requirements of different leather products.

[0038] After the coating is completed, it is dried in an oven, multi-stage temperature control is implemented, and the temperature is raised in stages. The temperature is 50 ° C to 160 ° C, and the w...

Embodiment 2

[0041] Prepare the coating solution according to the following ratio:

[0042]

[0043]

[0044] Add the raw materials except the thickener in the prescribed amount in sequence in the container, stir evenly with a disperser mixer, the stirring speed of the disperser mixer is 1500 rpm, after filtering, add the thickener to adjust the viscosity to obtain a coating liquid.

[0045] The prepared coating solution is made into an 8-fold coating foam through an intelligent dynamic foam generator, and then the coating foam is applied to the leather base cloth. The coating method is knife coating, roller coating or roller coating. The application amount is precisely controlled by the computer, and the application thickness is adjusted according to the requirements of different leather products.

[0046] After the coating is completed, it is dried in an oven, multi-stage temperature control is implemented, and the temperature is raised in stages. The temperature is 50 ° C to 170 °...

Embodiment 3

[0049] Prepare the coating solution according to the following ratio:

[0050]

[0051]

[0052] Add the raw materials except the thickener in the prescribed amount in the container in turn, stir evenly with a disperser mixer, the stirring speed of the disperser mixer is 1800 rpm, after filtering, add the thickener to adjust the viscosity to obtain a coating liquid.

[0053] The prepared coating solution is made into a 10-fold coating foam through an intelligent dynamic foam generator, and then the coating foam is applied to the leather base cloth. The coating method is knife coating, roller coating or roller coating. The application amount is precisely controlled by the computer, and the application thickness is adjusted according to the requirements of different leather products.

[0054] After the coating is completed, it is dried in an oven, multi-stage temperature control is implemented, and the temperature is raised in stages. The temperature is 50 ° C to 180 ° C, ...

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Abstract

The invention discloses a formula for producing ecological synthetic leather by adopting a waterborne polyurethane foaming coating. The formula comprises coating liquid, wherein the coating liquid is prepared from the following components at ratio: 52%-90.2% of waterborne polyurethane emulsion, 3%-15% of a filling agent, 2%-10% of ammonium stearate emulsion, 0.3%-0.5% of a foaming agent, 1%-3% of a penetrating agent, 1%-5% of a flatting agent, 0.5%-5% of color paste, 1%-3% of ammonia water and 1%-2% of a thickening agent. The process comprises the following steps: adding the raw materials in the formula; stirring and filtering; adjusting viscosity to obtain the coating liquid; preparing the coating liquid into a coating foam body; coating the coating foam body to leather base cloth; drying to obtain foaming bass; and carrying out after-treatment to obtain the polyurethane ecological synthetic leather. The product is strong in skin feeling, soft in hand feeling and good in stripping resisting fastness; the moisture content in the coating liquid is relatively low so that drying energy consumption and water resources are greatly saved; and no sewage and waste gas are produced in a production process and the environment-friendly performance is good.

Description

【Technical field】 [0001] The invention relates to the technical field of finishing technology for synthetic leather, in particular to the technical field of a formula and process for producing ecological synthetic leather with a water-based polyurethane foam coating. 【Background technique】 [0002] As a major producer of artificial leather and synthetic leather, my country is facing increasing pressure while the output of enterprises and total industrial output value are growing steadily, especially for exporting to the European market. The European Chemicals Agency officially announced the eighth batch of candidate list of substances of very high concern, including N,N-dimethylformamide (DMF). The promulgation of this regulation has once again put forward a severe test for synthetic leather manufacturers. [0003] my country's production enterprises basically use traditional solvent-based polyurethane resins to manufacture synthetic leather. Most of the solvents used as th...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/14D06N3/00
Inventor 宋金火宋婷婷
Owner 宋金火
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