What type of PVC pellets are used for PVC blister sheets or what type of PVC pellets are about the same hardness as the blister sheets. Please tell me.

To do the blister sheet manufacturers do not use PVC particles, are directly with PVC resin powder, add their own formula mixing, resin is generally used 700 or 800 degrees of polymerization, that is, SG8, SG7 or called K57, K60, there are some products will be used in 1000 degrees of polymerization of the powder, that is, SG5 or K67 type. Blister sheet is a hard sheet, the above mentioned resins can do it, but the formula of PVC sheet is very complicated, every family or every product is different. What do you want to make?