Waterborne synthetic leather is referred to as solvent-based synthetic leather (PU leather). To find out what water-based PU leather is, we must first understand the classification and structure of synthetic leather.
Waterborne PU leather
PU synthetic leather can be divided into dry PU and wet PU. Dry PU leather is composed of four layers of fabric, adhesive layer, surface layer and surface treatment layer. Wet PU leather is composed of five layers of fabric, adhesive layer, foaming layer, surface layer and surface treatment layer. Wet PU leather has one more foaming layer than dry PU leather. Traditionally, bonding layer, foaming layer, surface layer and surface treatment layer are made of polyurethane (PU) chemical materials containing DMF and other solvents.
Oily PU leather
Strictly speaking, synthetic leather made by replacing DMF and other solvents with chemical materials using water as solvent and coating the adhesive layer, foaming layer, surface layer and surface treatment layer of the water-soluble agent on the surface of the cloth is water-based leather.
Waterborne PU leather
On the surface, only DMF and other solvents in chemical materials are replaced by water. However, from the point of view of scientific research, qualitative changes have taken place in many aspects, such as raw material selection, distribution planning, process, equipment selection and so on.
