INJECTION MOULDING PROCESS USING POLYMER BLENDS CONTAINING HIGH MOLECULAR POLYETHYLENE OF HIGH DENSITY

• Main Author: KUBAT, JOSEF
• Format: Patent
• Language: English; French; German
• Published: 07.01.1981
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Un procede de production de pieces moulees par injection ayant des proprietes de resistance mecanique sensiblement ameliorees consiste a melanger du polyethylene de poids moleculaire eleve ayant une haute densite avec un materiau matriciel qui consiste en un materiau polymere avec lequel le polyethylene de poids moleculaire eleve possede une compatibilite et a mouler ce melange par injection a des pressions de moulage elevees depassant 250 MPa, permettant de produire un article moule par injection renforce par des fibres et ayant des proprietes mecaniques ameliorees. PCT No. PCT/SE79/00210 Sec. 371 Date Jun. 20, 1980 Sec. 102(e) Date Jun. 12, 1980 PCT Filed Oct. 19, 1979 PCT Pub. No. WO80/00813 PCT Pub. Date May 1, 1980.A process for producing injection moulded parts having markedly improved mechanical strength properties is described wherein a blend of high molecular polyethylene having high density with a matrix material which consists of a polymeric material with which the high molecular polyethylene has a limited compatibility is injection moulded at high injection moulding pressures exceeding 250 MPa, whereby a fibre reinforced injection moulded article having improved mechanical properties is produced.