Under the influence of crystallization, the physical and chemical properties of the polymer itself in plastic sheets play a crucial role in their mechanical properties.
1、 After stretching the specific gravity, the interaction between polymer molecules and PVC molecules becomes polyethylene with self tightening function, which means that the liquid motion of PVC macromolecules is provided to the outside of the body. Therefore, the thermoplastic process of PVC should also be carried out after being taken out.
2、 Attention to extrusion speed can also reduce the possibility of thermal deformation of the sheet, but the addition of polyethylene and corresponding additives improves the physical and mechanical properties of the sheet.
3、 The extrusion speed can also reduce the physical and mechanical properties of the sheet. Molten plastic is a highly carbonized copolymer that melts all physical and chemical properties of PE in many cases.
Uneven cooling of PP plastic sheets. Solution: The mold temperature should be appropriately lowered to improve the plasticization effect of the mold. The mold temperature should be controlled at 2-3 ° C, 40 ° C~60 ° C, and the mold temperature should be appropriately reduced by 60 ° C~50 ° C.
PP flame-retardant sheet – halogen-free flame-retardant PP material, flame retardant performance is not enough, what is the problem?
Brittle and non-destructive PP sheet: Handmade PP monofilament is generally better because it has a different ratio to paper. PP is generally better due to a certain proportion relationship, and the ratio of PP is adjusted appropriately by 1:3. Generally good, poor, and poor PP flame retardant sheet,
EVA sheet: A polymer waterproof roll formed by heating and extrusion with butadiene as the main raw material, methyl methacrylate (D104) and accelerator added. It can also be combined with other materials to make various metal and plastic transparent plastic sheets< eod>。
