Corrosive, abrasive and high temperature resistant resins may unknowingly damage the screw and barrel. For example, some engineering materials, thermoplastic elastomers and biopolymer materials sometimes constitute a corrosive environment. In addition, reinforcing materials (such as glass fibers, glass balls, etc.), certain fillers and additives, are all abrasive.
　　In order to avoid affecting the output power and product quality, it is necessary for processors to monitor the damage that these materials may cause to the equipment. In order to adhere to high processing standards, it is necessary to establish a preventive protection program (hereinafter referred to as the "PM" program). At the time of demand, the screw and barrel should be inspected and measured in all directions, and the screw should be pulled out to perform equipment or replacement from the beginning, because minimal wear will also affect product quality.
　　The best way to protect equipment from corrosive and abrasive resins is to select really suitable materials to make the screw and barrel. In order to cope with corrosive, abrasive and high-temperature-resistant melts, wear-resistant barrels and screws are manufactured, and the processing cost is about 3 to 4 times higher than that of standard polyolefin screws. This is because wear-resistant alloys are more expensive and difficult to process. But they can provide a longer life span for regular use, and the repair interval can be longer.

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