Fiber reinforced composite

1. A fiber reinforced composite comprising

(a) a monophasic polypropylene composition (PPC),

(b) fibers (F),

(c) a polar modified polypropylene as adhesion promotor (AP),

wherein said monophasic polypropylene composition (PPC) comprises at least three semicrystalline polypropylenes (PP1), (PP2), (PP3),

(a1) said semicrystalline polypropylene (PP1) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 1.0 to 60.0 g/10 min,

(a2) said semicrystalline polypropylene (PP2) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 40 to 120 g/10 min, and

(a3) said semicrystalline polypropylene (PP3) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 180 to 1,000 g/10 min,

with the proviso that the melt flow rate MFR 2 (230° C.) of the semicrystalline polypropylene (PP1) is lower than the melt flow rate MFR 2 (230° C.) of the semicrystalline polypropylene (PP2).

2. The fiber reinforced composite according to claim 1 , wherein

(a) said semicrystalline polypropylene (PP1) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 1.0 to 55 g/10 min, and

(b) said semicrystalline polypropylene (PP2) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 56 to 120 g/10 min.

3. The fiber reinforced composite according to claim 1 , wherein said composite comprises

(a) 29.0 to 60.0 wt.-%, based on the fiber reinforced composite, of the monophasic polypropylene composition (PPC),

(b) 39.0 to 70.0 wt.-%, based on the fiber reinforced composite, of fibers (F), and

(c) 0.5 to 5.0 wt.-%, based on the fiber reinforced composite, of the polar modified polypropylene as adhesion promotor (AP).

4. The fiber reinforced composite according to claim 1 , wherein

(a) the weight ratio between the fibers (F) and the polypropylene composition (PPC) [(F)/(PPC)] is in the range of 0.7 to 2.0, or

(b) the weight ratio between the fibers (F) and the polar modified polypropylene is in the range of 10 to 50, or

(c) the weight ratio between the fibers (F) and the monophasic polypropylene composition (PPC) [(F)/(PPC)] is in the range of 0.7 to 2.0 and the weight ratio between the fibers (F) and the polar modified polypropylene is in the range of 10 to 50.

5. The fiber reinforced composite according to claim 1 , wherein the monophasic polypropylene composition (PPC) is α-nucleated.

6. The fiber reinforced composite according to claim 1 , wherein

(a) the monophasic polypropylene composition (PPC) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 25 to 165 g/10 min, or

(b) the reinforced composite has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 1.0 to 10 g/10 min, or

(c) the monophasic polypropylene composition (PPC) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 25 to 165 g/10 min and the reinforced composite has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 1.0 to 10 g/10 min.

7. The fiber reinforced composite according to claim 1 , wherein

(a) the weight ratio between the semicrystalline polypropylene (PP2) and the sum of the semicrystalline polypropylenes (PP1) and (PP3) [(PP2)/((PP1)+(PP3))] is in the range of 0.4 to 3.0, or

(b) the weight ratio between the semicrystalline polypropylene (PP3) and the semicrystalline polypropylenes (PP1) [(PP3)/(PP1)] is in the range of 0.5 to 4.0, or

(c) the weight ratio between the semicrystalline polypropylene (PP2) and the sum of the semicrystalline polypropylenes (PP1) and (PP3) [(PP2)/((PP1)+(PP3))] is in the range of 0.4 to 3.0 and the weight ratio between the semicrystalline polypropylene (PP3) and the semicrystalline polypropylenes (PP1) [(PP3)/(PP1)] is in the range of 0.5 to 4.0.

8. The fiber reinforced composite according to claim 1 , wherein the semicrystalline polypropylenes (PP1), (PP2), (PP3) are propylene homopolymers (H-PP1), (H-PP2), (H-PP3).

9. The fiber reinforced composite according to claim 1 , wherein the semicrystalline polypropylene (PP2) and (PP3) are propylene homopolymers (H-PP2) and (H-PP3), whereas the semicrystalline polypropylene (PP1) is a propylene copolymer (R-PP1).

10. The fiber reinforced composite according to claim 1 , wherein the fibers (F) are selected from the group consisting of glass fibers, metal fibers, ceramic fibers, carbon fibers and graphite fibers.

11. The fiber reinforced composite according to claim 1 , wherein the fibers (F) have an average diameter of 5.0 to 20.0 μm.

12. The fiber reinforced composite according to claim 1 , wherein the fibers (F) have an average length of 2 to 8 mm.

13. The fiber reinforced composite according to claim 1 , wherein the adhesion promotor (AP) is a maleic anhydride functionalized polypropylene.

14. An injection molded article comprising a fiber reinforced composite comprising

(a) a monophasic polypropylene composition (PPC),

(b) fibers (F),

(c) a polar modified polypropylene as adhesion promotor (AP),

wherein said monophasic polypropylene composition (PPC) comprises at least three semicrystalline polypropylenes (PP1), (PP2), (PP3),

(a1) said semicrystalline polypropylene (PP1) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 1.0 to 60.0 g/10 min,

(a2) said semicrystalline polypropylene (PP2) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 40 to 120 g/10 min, and

(a3) said semicrystalline polypropylene (PP3) has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 180 to 1,000 g/10 min,

with the proviso that the melt flow rate MFR 2 (230° C.) of the semicrystalline polypropylene (PP1) is lower than the melt flow rate MFR 2 (230° C.) of the semicrystalline polypropylene (PP2).

15. The injection molded article according to claim 14 , wherein the article is an automotive article.

16. The fiber reinforced composite according to claim 4 , wherein the weight ratio between the fibers (F) and the monophasic polypropylene composition (PPC) [(F)/(PPC)] is in the range of 0.7 to 2.0 with the proviso that the sum of the fibers (F) and the monophasic polypropylene composition (PPC) in the fiber reinforced composite is at least 80 wt.-% based on the total weight of the fiber reinforced composite.

17. The fiber reinforced composite according to claim 10 , wherein the fibers (F) are glass fibers.