Polyolefin Composition Comprising Polypropylene Homopolymer and Recycled Plastic Material

A polyolefin composition comprising

• a) 30-60 wt % (based on the overall weight of the polyolefin composition) of at least one polypropylene homopolymer,
• b) 15-40 wt % (based on the overall weight of the polyolefin composition) of a mixed-plastics polypropylene blend of recycled material having
• (i) a crystalline fraction (CF) content determined according to CRYSTEX QC analysis in the range from 91.0 to 94.0 wt.-%, and
• (ii) a soluble fraction (SF) content determined according to CRYSTEX QC analysis in the range from 6.0 to 9.0 wt.-%, whereby
• (iii) said crystalline fraction (CF) has a propylene content (C3(CF)) as determined by FT-IR spectroscopy calibrated by quantitative 13C-NMR spectroscopy, in the range from 95.0 to 99.0 wt.-%;
• preferably 96.0 to 98.0 wt.-% and whereby
• (iv) said crystalline fraction (CF) has an ethylene content (C2(CF)), as determined by FT-IR spectroscopy calibrated by quantitative 13C-NMR spectroscopy, in the range from 1.0 to 5.0 wt.-% preferably 2.0 to 4.0 wt.-%, more preferably 2.5 to 3.5 wt.-%;
• and
• (v) said soluble fraction (SF) has an intrinsic viscosity (iV(SF)) in the range from 1.10 to below 1.50 dl/g, preferably 1.20 to 1.40 dl/g;
• and
• whereby
• (vi) the mixed-plastics polypropylene blend has inorganic residues as measured by calcination analysis (TGA) according to DIN ISO 1172:1996 of 0.05 to 3.0 wt.-%, preferably 0.05 to 2.5 wt.-%, optionally 1.0 to 2.5 wt.-% with respect to the mixed-plastics polypropylene blend;
• and
• whereby
• (vii) the mixed-plastics polypropylene blend does not contain benzene above the detection limit of HS GC-MS 80° C./2 h;
• and
• whereby
• (viii) the mixed-plastics polypropylene blend has a CIELAB color space (L*a*b*) of
• L* from 72.0 to 97.0 preferably from 80.0 to 97.0;
• a* from −5.0 to 0.0;
• b* from 0.0 to below 22.0.
• c) 15-30 wt % (based on the overall weight of the polyolefin composition) of glass fibers;
• d) 0.5-2.5 wt % (based on the overall weight of the polyolefin composition) of at least one coupling agent, and optionally further additives, wherein the sum of all ingredients adds always up to 100 wt %,
• wherein the polyolefin composition has
• a melt flow rate MFR2 (230° C., 2.16 kg, measured according to ISO 1133) of at least 5 g/10 min;
• a tensile modulus at 23° C. of at least 5000 MPa (ISO 527-2), and
• a tensile stress at yield at 23° C. of at least 80 MPa (ISO 527-2).