Formula and technology of waterborne polyurethane foaming velvet and silk sense synthetic leather

Abstract

The invention discloses a formula of water-based polyurethane foamed velvet-like silk-like synthetic leather, which comprises a coating liquid; the coating liquid comprises the following component ratios: 17%-92.5% of water-based polyurethane emulsion; 1%-15% of filler; Polyurethane fluff powder or polyurethane elastic powder 1%~25%; ammonium stearate emulsion 1%~10%; leveling agent 1%~5%; dispersant 0.5%~3%; ammonia water 0.5%~2%; color paste 1% to 10%; thickener 1% to 5%; modifier 0.5% to 8%. Process: Add formula raw materials, stir and filter, adjust viscosity to obtain coating liquid; make coating foam into coating foam, and apply it to leather base cloth; dry to obtain foaming velvet feel and silk feel bass; post-processing and Surface treatment, polyurethane foam velvet feel silky synthetic leather. The wear-resistant and scratch-resistant properties of the invention far exceed the film fastness of traditional synthetic leather, and the air permeability is very good, and it also has certain solvent resistance and heat resistance, and has good environmental protection performance.

Description

【Technical field】 [0001] The invention relates to the technical field of finishing technology for synthetic leather, in particular to the technical field of the formulation and process of water-based polyurethane foamed velvet-feeling silk-feeling synthetic leather. 【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 the...

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] At present, the production process of oily and water-based synthetic leather is generally post-processing after Bass film, mainly because the wear fastness of Bass is not enough, and the wear fastness of the surface can only be increased by filming, but the synthetic leather will affect the feel after being filmed. , the cost will also increase significantly, and the water-based polyurethane synthetic leather obtained by pasting the film has no air permeability, which is the biggest product defect

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