The current automotive sealing strip materials mainly include four types: PVC sealing strip, EPDM sealing strip, TPV sealing strip, and TPE sealing strip. Below, we will analyze the advantages and disadvantages of these four automotive sealing strip materials.

The extrusion machines in the domestic plastic industry are roughly divided into two categories: single screw extruder and twin screw extruder. Because these two types of equipment have their own characteristics, they are widely used in the plastic industry.

The conical twin-screw feeder solves the complicated feeding procedure in the prior art plastic granulation process, and realizes the conical twin-screw feeding integrated unit for stable and continuous feeding to the extruder.

This article introduces the basic principles of twin screw extrusion of plastics, including Mechanical principles，Thermal principle，Deceleration principle，The feed acts as a coolant，In the feed zone, sticks to the barrel & slides onto the screw，Materials cost the most，Energy costs are relatively unimportant，The pressure at the end of the screw is very important，Output = displacement of last thread +/- pressure flow and leakage，Shear rate plays a major role in viscosity， and The motor is opposed to the barrel these aspects.

The difference between twin screw extruder and single screw extruder is mainly reflected in the following two aspects.

Mechanical principle of single screw extruder

The difference between single and twin screw extruder

Introduction and application of single screw extruder (1) Introduction of single screw extruder (2) Application of single screw extruder (3) Maintenance of single screw extruder

SJ-300 single screw extruder

SJ-150 single screw extruder