Compression blow formed articles
View Patent ↗The invention provides a compression blow formed article formed from a composition comprising at least the following: 1) a polypropylene homopolymer and 2) a propylene-based polymer.
1. A compression blow formed article formed from a composition comprising at least the following: 1) a polypropylene homopolymer having a melt flow index (MFI) from 0.5 to 10 g/10 min and 2) an azide coupled long chain branched random propylene-based interpolymer or azide coupled long chain branched random propylene-based copolymer in an amount from 5 to 35 wt % based on the total weight the composition, having a melt flow rate (MFR) from 0.3 to 10 g/10 min, and having a melt flow index (MFI) from 0.2 to 5 g/10 min.
2. The article of claim 1 , wherein the polypropylene homopolymer has a melt flow index (MFI) from 1 to 7 g/10 min.
3. The article of claim 1 , wherein the azide coupled long chain branched random propylene-based interpolymer or azide coupled long chain branched random propylene-based copolymer has a melt flow rate (MFR) from 0.5 to 7 g/10 min.
4. The article of claim 1 , wherein the azide coupled long chain branched random propylene-based interpolymer or azide coupled long chain branched random propylene-based copolymer is present in an amount from 70 to 80 wt %, based on the weight of the composition.
5. The article of claim 1 , wherein the azide coupled long chain branched propylene-based interpolymer has a melt flow index (MFI) from 0.3 to 3 g/10 min.
6. The article of claim 1 , wherein the azide coupled long chain branched propylene-based polymer has a melt flow index (MFI) from 1 to 3 g/10 min.
7. The article of claim 1 , wherein the azide coupled long chain branched propylene-based polymer is present in an amount from 10 to 30 wt % based on the total weight of the composition.
8. The article of claim 1 , wherein the article is stretched after being compressed.
9. The article of claim 1 , wherein the polypropylene homopolymer has a melt flow index (MFI) from 2 to 4 g/10 min.
10. The article of claim 1 , wherein the azide long chain branched coupled propylene-based polymer has a melt flow rate (MFR) from 1 to 3 g/10 min.
11. The article of claim 1 , wherein the azide coupled long chain branched propylene-based polymer is present in an amount from 20 to 30 wt %, based on the total weight of the composition.