A method of preparing polyurethane synthetic leather having overall antibacterial and mildew-proof properties

Abstract

A method of preparing polyurethane synthetic leather having overall long-acting, antibacterial and mildew-proof properties is disclosed. An efficient organic-inorganic compound antibacterial mildew preventive is selected and modified. The compound antibacterial mildew preventive is subjected to dispersibility modification by utilizing isocyanate and added into polyurethane slurry. A synthetic leather semifinished product having antibacterial and mildew-proof properties is prepared through a cloth base coating and soaking process, and then polyurethane slurry coating is performed by a dry-process release paper transferring method. A PU coating on the front surface of a finished product and a cloth layer on the back surface have long-acting excellent antibacterial and mildew-proof properties, namely a product of the method has overall antibacterial and mildew-proof properties.

Description

technical field [0001] The invention relates to the field of synthetic leather, in particular to a method for manufacturing integral antibacterial and antifungal polyurethane synthetic leather. Background technique [0002] Polyurethane synthetic leather has soft and natural luster, soft hand feeling and strong genuine leather appearance. It has excellent mechanical properties such as excellent adhesion to substrates, abrasion resistance, flex resistance, and aging resistance. It also has good cold resistance and breathability. , washable and easy to process, it is the most ideal substitute for natural leather. However, under suitable temperature and humidity conditions, microorganisms (bacteria and mold) will multiply on the PU synthetic leather, and the secretion of the mold will cause the biodegradation of the polyurethane, causing mold spots and cracks on the surface of the fiber, and shortening the service life of the synthetic leather. affect the user's health. In or...

AI Technical Summary

Problems solved by technology

At present, antibacterial and antifungal agents mainly include inorganic, organic and natural. Inorganic antibacterial and antifungal agents have good antibacterial and antibacterial and antifungal effects, but they are difficult to disperse and most of them have color, which affects the appearance of synthetic leather; organic antibacterial and antifungal agents Mold agents have longer antibacterial properties, but have the disadvantage of heat resistance and decomposition; natural antibacterial and antifungal agents have a wide range of sources and are easy to use, but their antibacterial and antifungal effects are limited, heat resistance is poor, sterilization rate is low, and they cannot be broad-spectrum and long-lasting use

At present, inorganic or organic antibacterial and antifungal agents are basically used in polyurethane synthetic leather. However, there are either problems of unsustainable antibacterial or poor thermal stability. To solve these problems, the mainstream method is to use inorganic- —Organic compound antibacterial ingredients, such as invention patents CN103266496A and CN201010519501, both use compound antibacterial and antifungal agents

In addition, at present, the antibacterial methods of polyurethane synthetic leather with antibacterial and antifungal properties are basically contact antibacterial and antibacterial. The effect is excellent, but on the other hand, the antibacterial and mildew resistance of the base fabric layer is poor