公开(公告)号：DE2608023A1

公开(公告)日：1977-09-08

申请号：DE2608023

申请日：1976-02-27

Applicant: BASF AG

Inventor： BUECHNER OSKAR DIPL CHEM DR ,  GIERTH VOLKER DIPL CHEM DR ,  MUELLER SIEGFRIED ING GRAD ,  WENDLER KLAUS ING GRAD ,  POHL WALTER ING GRAD

IPC: C08K3/30 ,  C08L23/06 ,  B65D65/38 ,  C08J5/18 ,  C08K3/24

Abstract: Film for making heavy duty sacks 150-300 mu thick is made from (a) polyethylene with a density of 0.915-0.935 g/cm3 and a melt index of 0.05-50g/10 min. and (b) 0.05-0.5 wt.% (on a) of calcium sulphate powder with an av. particle size of >10 (10-90)mu. Pref. the calcium sulphate contains at most 1/2 mol. water of crystallisation per mol calcium sulphate. The films have good anti-blocking properties and pleasant texture, and can be used in packing equipment without breakdown in prodn. Compared with SiO2-filled films, they have reduced tendency to yellowing and optical defects.