Glass fiber reinforced thermoplastic polymer composition comprising a thermoplastic polymer composition with high flowability
AssigneeSabic Global Technologies B.V.
InventorsRob Donners, Zahra Fahimi, Tariq Syed, Bin Sun
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Abstract
The present invention relates to a process for producing a glass fiber reinforced thermoplastic polymer composition and such glass fiber reinforced thermoplastic polymer composition. The present invention further relates to an article comprising the glass fiber reinforced thermoplastic polymer composition. The glass fiber reinforced thermoplastic polymer composition has improved white spot performance.
Claims16
Process for the preparation of a glass fiber reinforced polymer composition (G), comprising the subsequent steps of
- a) unwinding from a package of at least one continuous glass multifilament strand;
- b) applying an impregnating agent to the continuous glass multifilament strand to form an impregnated continuous multifilament strand;
- and
- c) applying a sheath of thermoplastic polymer composition (X) around the impregnated continuous glass multifilament strand to form a sheathed continuous multifilament strand, wherein the melt flow index (MFI) of the thermoplastic polymer composition (X) is in the range from 78 to 180 dg/min as measured according to ISO1133-1:2011 with a 2.16 kg load at 230° C.;
- wherein the process runs at a line speed of at least 100 m/min.
Process for the preparation of a glass fiber reinforced polymer composition (G), comprising the subsequent steps of
- a) unwinding from a package of at least one continuous glass multifilament strand;
- b) applying an impregnating agent to the continuous glass multifilament strand to form an impregnated continuous multifilament strand;
- and
- c) applying a sheath of thermoplastic polymer composition (X) around the impregnated continuous glass multifilament strand to form a sheathed continuous multifilament strand, wherein the melt flow index (MFI) of the thermoplastic polymer composition (X) is in the range from 78 to 180 dg/min as measured according to ISO1133-1:2011 with a 2.16 kg load at 230° C.,
- wherein the process runs at a line speed of at least 100 m/min,
- wherein the process further comprises the following subsequent steps after step c) to obtain the glass fiber reinforced polymer composition (G) in pellet form;
- d) cooling the sheathed continuous glass multifilament;
- e) cutting the sheathed continuous glass multifilament strand into pellets,
- wherein a total amount of the thermoplastic polymer composition (X) and the impregnated continuous multifilament strand in a pellet obtained by the cutting step is at least 95 wt % with respect to the pellet.
Process for the preparation of a glass fiber reinforced polymer composition (G), comprising the subsequent steps of
- a) unwinding from a package of at least one continuous glass multifilament strand;
- b) applying an impregnating agent to the continuous glass multifilament strand to form an impregnated continuous multifilament strand;
- and
- c) applying a sheath of thermoplastic polymer composition (X) around the impregnated continuous glass multifilament strand to form a sheathed continuous multifilament strand, wherein the melt flow index (MED of the thermoplastic polymer composition (X) is in the range from 78 to 180 de/min as measured according to ISO1133-1:2011 with a 2.16 kg load at 230° C.,
- wherein the process runs at a line speed of at least 100 m/min,
- wherein the impregnating agent comprises a branched polyethylene wax having an apparent viscosity in the range from 2.5 to 200 cSt at 160° C. measured in accordance with ASTM D 3236-15.
Dependencies are inferred from the claim text.