公开(公告)号：GB1078738A

公开(公告)日：1967-08-09

申请号：GB4392164

申请日：1964-10-28

Applicant: BASF AG

Inventor： HAEBERLE MANERED ,  RETTIG AUGUST ,  ZIZLSPERGER JOHANN

IPC: B29B9/00 ,  B29B13/02 ,  B29C43/00 ,  C08K5/098 ,  C08K5/42 ,  C08K7/00 ,  C08L23/02

Abstract: In moulding processes where polyolefines such as polyethylene or polypropylene having a molecular weight of more than 120,000 are plasticized mainly by the effect of frictional heat, e.g. in extrusion and injection moulding, the polyolefine is supplied to the moulding machine in the form of sintered granules together with 0.05-5.0% by weight of a lubricant. The lubricant, which is said to increase the throughput of material without degradation or melt fracture thereof, is an organic or inorganic substance which crystallizes into a layer lattice structure and may be the salt of a monovalent to tetravalent metal with a saturated or unsaturated carboxylic acid, e.g. sodium, zinc or cobalt stearate, or, as examples of an inorganic substance, graphite, graphitic acids, molybdenum disulphide, magnesium silicate or boron nitride. The starting material may be obtained by conventionally mixing the sintered granules and lubricant or by applying an atomized solution of the lubricant to the granules.