Formula and process for producing multifunctional synthetic leather from waterborne polyurethane intumescent coating

Abstract

The invention discloses a formula for producing a multifunctional synthetic leather from a waterborne polyurethane intumescent coating. The formula includes a coating liquid; the coating liquid comprises the following components: 44%-90% of waterborne polyurethane emulsion, 3%-10% of a filler, 1%-20% of an aqueous multifunctional finishing agent, 3%-8% of ammonium stearate emulsion, 0.5%-2% of a foaming agent, 1%-5% of a leveling agent, 0.1%-3% of aqueous ammonia, 1%-3% of a thickener and 0.4%-5% of an aqueous color paste. A process is as below: preparing a coating solution; preparing a coating foam, and then applying the coating foam to a leather fabric through precise control of the coating amount by the computer; drying in an oven; and conducting post-treatment to obtain the multifunctional synthetic leather. The product has strong skin feel, soft handle and good peeling resistance and fastness; the coating solution has low water content, and significantly reduces drying energy and water resource; and the entire production process does not produce any sewage or exhaust emission, and is in line with environmental requirements.

Description

【Technical Field】 [0001] The invention relates to the technical field of synthetic leather finishing technology, in particular to the technical field of a formula and process for producing multifunctional 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 pressures, especially for export to the European market, while the output of enterprises and the total industrial output value are increasing steadily. The European Chemical Agency officially announced the eighth batch of candidate lists of substances of high concern, including N,N-dimethylformamide (DMF). The promulgation of this regulation once again put forward a severe test for synthetic leather manufacturers. [0003] Production enterprises in my country basically use traditional solvent-based polyurethane resins to make synthetic leather. Most of the solvents used as resin dispersion ...

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] The production process of water-based synthetic leather currently on the market is mainly to use water-based polyurethane to coat the leather base cloth first, and then solidify and solidify in water containing calcium chloride. Since a certain amount of gas will be generated during the curing process, this Relatively speaking, it will improve the feel of the bass, but the effect is not very obvious, and a large amount of waste water will be generated during the production process to pollute the environment. Furthermore, due to solidification and solidification in water, the controllability of the production process is difficult to grasp. The quality is very unstable, and the drying energy consumption is also very large, so this technical process is basically unable to be popularized and applied.

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