公开(公告)号：US20180264683A1

公开(公告)日：2018-09-20

申请号：US15533531

申请日：2015-12-02

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Carmela Tufano ,  Willy Joseph Dijsselbloem ,  Stefan Gielen ,  Gerard Jan Eduard Biemond ,  Johannes Henricus Theodorus Daalmans

IPC: B29B9/14 ,  B29B9/06

CPC classification number: B29B9/14 ,  B29B9/06 ,  B29C48/0022 ,  B29C48/04 ,  B29C48/05 ,  B29K2023/12

Abstract: The present invention relates to a process for the manufacture of a long glass fibre reinforced polypropylene composition. The process comprises: a) providing at least one continuous glass multifibre strand, b) applying a sheath of a polypropylene composition around said continuous glass multifibre strand so as to form a sheathed continuous glass multifibre strand, c) cooling the sheathed continuous glass multifibre strand to a cutting temperature, d) cutting the sheathed continuous glass multifibre strand into pellets using a rotary cutting tool at a cutting temperature that satisfies the following equations I, II and III T_max=−0.625×GF+112.5  (I) T_min=10  (II) T_min≤T_cut≤T_max  (III) wherein: T_cut is the cutting temperature, T_max is the maximum cutting temperature [° C.], T_min is the minimum cutting temperature [° C.], and GF is the amount of glass fibres based on the weight of the composition [wt. %].