公开(公告)号：DE2510697A1

公开(公告)日：1976-09-23

申请号：DE2510697

申请日：1975-03-12

Applicant: BASF AG

Inventor： BUECHNER OSKAR DIPL CHEM DR ,  GIERTH VOLKER DIPL CHEM DR ,  MUELLER-TAMM HEINZ DIPL CHEM D ,  MUELLER SIEGFRIED ING GRAD ,  KROLL WOLFRAM RAINER DIPL CHEM

IPC: C08K5/05 ,  C08L23/08 ,  C08L95/00

公开(公告)号：DE2442230A1

公开(公告)日：1976-03-18

申请号：DE2442230

申请日：1974-09-04

Applicant: BASF AG

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

IPC: B29C47/00 ,  B29C47/80 ,  B29B1/10

Abstract: Polyethylene film is prepd. by homogenising polyethylene of density 0.916-0.932 g/cm3 and melt index 0.05-1g/10, mins. with 50-400 ppm peroxide in an extruder having sepn. of 0.1-0.5 mm between the screw(s) (themselves) and the stationary part. the ratio of minimal sepn. between moving part(s) and stationary or other moving parts:length of area of narrow slit regions in the flow direction lies in the range of 10-2-10-5. The films have high strength and low blocking props. and may be used in the sack making industry.

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.