කෘතිම සම් is generally classified according to the synthetic resin used.
පළමුවැන්න PVC ය (පොලිවිවයිල් ක්ලෝරයිඩ්), දහනයෙන් පසු නිෂ්පාදන වේ, ජලය, කාබන්ඩයොක්සයිඩ් සහ ක්ලෝරීන් අඩංගු සංයෝග, ක්ලෝරීන් වායුව පවා නිපදවයි; එය පොලිවිවයිල් ක්ලෝරයිඩ් ෙරසින් මිශ්රණයකි, plasticizer and other matching agents, coated or laminated to fabric, and made by a certain processing process to wake up the material products. අතිරෙකව, there are also double-sided polyvinyl chloride artificial leather with plastic layer on both sides of the base material.
The second type is PE (polyethylene), PU leather සහ Faux Leather අතර වෙනස ලෙදර් සපත්තු සහ සපත්තු අතර වෙනස මෙන්, when fully burned, theoretically produces only water and carbon dioxide.
The third and most common type is PU (පොලියුරේතන්), whose products after full combustion include: ජලය, එය තුනෙන් අවම වශයෙන් භාවිතා වේ, nitrogen, and a small amount of nitrogen-containing compounds. Polyurethane leather is divided into dry polyurethane leather and wet polyurethane leather. Dry polyurethane synthetic leather is a multilayer structure made up of a solvent-based polyurethane resin solution that has evaporated to remove the solvent, and a multilayer film with a backing fabric. The wet polyurethane artificial leather is a multilayer structure with good air permeability and moisture permeability and continuous porous layers obtained by using solvent-based polyurethane resins and the film formation method in water.
Because of the different synthetic resin used in artificial leather, different kinds of substrate, different production methods, with or without foam and different uses, artificial leather can be divided into many kinds. Artificial leather is classified according to the synthetic resin used, production process and application.
