Along with the the CaCO3 proportion increaseing when processing the PVC product, as well as late-model PVC is similar to raw material bring up, Leading to damage of actual conical twin-screw resist abrasion, resist corrosion . people developed and introduced  modern plastic process usage based on actual need , have high-accuracy , high hardness, antifraying , anti-corrosion for merit. The main material used in Jnha factory conclude: alloy steel mainly , tool steel , stainless steel ! The following form has listed material of all kinds shop sign detailedly and has summarized their characteristic and the pertinent application data!