Offset printing is a kind of lithography. Simply put, offset printing is a printing method that transfers the graphics and text on the printing plate to the substrate with the help of a blanket. It is the existence of blanket that gives this printing method its name.
Printing guide belt is composed of multi-layer special fiber fabric and synthetic rubber. In the manufacturing process, fiber fabrics and rubber are combined with thermal energy and chemical energy in the process of precise control. In addition, different compounds and structures make the blanket have different properties on the printing press.
The fiber fabric layer of the printed guide belt is different layer by layer. The fiber fabric layer is composed of synthetic fibers and natural fibers, and the strength and resistance of each layer are different.
Synthetic rubber is a synthetic polymer with high elasticity. Also known as synthetic elastomer, it is one of the three major synthetic materials, and its output is only lower than that of synthetic resin (or plastic) and synthetic fiber. The classification standard of PVC and PP you mentioned is for single-component plastic products, while synthetic rubber is a mixture of various plastics. There are many kinds of synthetic rubber, and the composition of different kinds of synthetic rubber is very different. So it is difficult to determine whether it belongs to PVC or PP or something else.