In dipping process,the impregnating solution is completely and uniformly distributedbetween the spaces of base by pressing and squeeze. The addition of PU makes the base formintegral structure from a macroscopical view,and the product has similar handle w...[继续阅读]

    4.3.1 The principle of film-forming/pore-forming4.3.1.1 The mechanism of coagulationThe introduction of non-solvent into the polymer solution system can cause phase separation,so that the film is formed. This kind of technics usually is three-phase system...[继续阅读]

    5.1.1 Purpose and methodsIn the dry process,fabrics are changed to leather which has similar structure and texture withthe grain of leather by artificial means. The dry processing technology can be divided into twotypes: direct knife coating and indirect ...[继续阅读]

    The coating agents used in dry process of synthetic leather are materials which can form firmbonding and continuous film on the surface of release paper or bases. It mainly consists of filmforming substance,colorant and solvent which are mixed together at...[继续阅读]

    5.3.1 The characteristics and requirements of release paperRelease paper also is called transfer printing paper,and it is indispensable carrier materialin transfer coating process which can endue synthetic leather beautiful pattern. The coating agentfirst...[继续阅读]

    5.4. 1 The procedure of dry processThe production principle of release paper method is the coatings with different properties arecoated on the surface of moving release paper through reverse roller coating or knife coating,andthen they are dried and cured...[继续阅读]

    5.5.1 The structure of filmThe purpose of dry process is to improve the value and durability of synthetic leather. Theapplication and using condition of different synthetic leather is different,so the requirements totop coating are not the same. The gener...[继续阅读]

    With the development of industry,especially in the 21th century,the environment protectionmore and more get the attention of the world. Solventborn resin contain a lot of volatile organicsolvent (VOC) and it will be discharged into the atmosphere,so it ca...[继续阅读]

    6.1.1 The purpose,principle and varieties of embossing6.1.1.1 The purpose of embossingEmbossing is an important post-processing tool for synthetic leather and it is mainly used inthe modification of the surface texture of synthetic leather with coating ob...[继续阅读]

    A thin layer of surface treating agent is coated on finished leather,which can improve theappearance,handle,color,pattern and mechanical properties of surface,such as lusterintensification and extinction. The purpose is to make the products meet the requi...[继续阅读]