A kind of preparation method of water-repellent and oil-repellent superfine fiber synthetic leather

Abstract

The invention relates to the technical field of preparation of leathers, provides a preparation method of water-repellent oil-repellent superfine fiber synthetic leather and solves the problem that the prior art leather with water and oil repellency has poor breathability, poor elasticity and poor mechanical properties. The preparation method comprises the following treatment steps: (1), preparing a pretreating agent; (2), spraying the pretreating agent obtained in step (1) to the surface of superfine fiber synthetic fiber, and standing for reacting and adsorbing; (3), preparing a water-repellent oil-repellent finishing agent which comprises the materials, according to following parts by weight, 20-30 parts of silicon dioxide, 10-15 parts of gelatin, 20-25 parts of nano rubber micro-powder, and 20-30 parts of acrylic emulsion; (4), soaking the superfine fiber synthetic leather treated in step (2) into the water-repellent oil-repellent finishing agent of step (3) for 60-75 min; (5), drying: drying a product obtained in step (4) by using plasma gas.

Description

technical field [0001] The invention relates to the technical field of leather preparation, in particular to a method for preparing water and oil repellent superfine fiber synthetic leather. Background technique [0002] With the increasing application fields of polyurethane microfiber synthetic leather (referred to as microfiber leather), the requirements for its water-repellent, oil-repellent and anti-fouling functions are also becoming stronger and stronger. Whether the material has the function of water repellency, oil repellency and antifouling is whether water or oil can wet the surface of the solid, and there are two ways to judge whether the water or oil can wet the solid surface: one is by comparing the surface of the solid Critical surface tension and interfacial tension between water or oil and solid. When the critical surface tension of solid surface is less than the surface tension between water or oil and solid, water or oil cannot wet the surface of the solid,...

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Problems solved by technology

[0005] Therefore, in view of the above content, the present invention provides a method for preparing water and oil repellent microfiber synthetic leather, which solves the problem of poor air permeability, poor rebound effect and mechanical properties of leather with water and oil repellency in the prior art. bad question