Masterbatch pellet mixture

摘要

A mixture including a high specific gravity masterbatch pellets group (A) with specific gravity within a range from 1.8 to 3.5, and a low specific gravity masterbatch pellets group (B) with specific gravity within a range from 0.5 to 1.6. The high specific gravity masterbatch pellets group (A) comprises m different columnar masterbatch pellets, each with a different specific gravity, and the low specific gravity masterbatch pellets group (B) comprises n different columnar masterbatch pellets, each with a different specific gravity. The high specific gravity masterbatch pellets group (A) and the low specific gravity masterbatch pellets group (B) satisfy a formula (1) shown below: $\begin{array}{cc}0.5\left({\mathrm{mm}}^{-1}\right)<=\sum _{p=1}^m\left(\frac{\mathrm{Hp}}{\mathrm{Sp}}x\mathrm{Rp}\right)-\sum _{q=1}^n\left(\frac{\mathrm{Hq}}{\mathrm{Sq}}x\mathrm{Rq}\right)<=12\left({\mathrm{mm}}^{-1}\right).& \left(1\right)\end{array}$