How to control the tensile strength of flat wire of woven bags?

Filling masterbatch is one of the main components of raw material, which is used to improve the physical properties of flat wire and reduce the cost. With the increase of filling masterbatch, the tensile strength of flat wire will be down. This is because the main component of filling masterbatch is calcium carbonate and this material is no tension. After the filling masterbatch is added, it’s dispersed in the gap pf polyolefin polymer chain, which has effect on the tensile strength of flat wire. When a small amount of filling masterbatch is added, the strength does not change, but the stiffness is improved. When the addition amount exceeds 20% ~ 25%, the filling masterbatch occupies the position of the polymer chain due to excess, which hinders the elastic deformation of the polymer, so that the polymer chain can not be fully stretched along the longitudinal external force, which affects the tensile orientation effect of the polymer chain. The strength and stiffness of the flat wire are significantly reduced, and the relative breaking force of the flat wire is less than 0.32n/tex, It cannot meet the provisions of the national standard GB / t8946. In the actual production process, the addition amount of filling masterbatch is more suitable in the range of 8% ~ 12%.