High gloss polyethylene articles
The present invention includes an end use article (i.e., an article of manufacture) and a process for making the same, wherein the end use article has a relatively high gloss and exhibits excellent processability over a wide range of processing conditions. The end use article can be formed with glossy polyethylene having an “a” parameter less than or equal to about 0.40, and the glossy polyethylene can be a Metallocene polyethylene. The end use article can have a 60° specular gloss of at least about 40%, or from about 40% to about 80%, or from about 60% to about 80%. The end use article may be pigmented or unpigmented.
1. An blow molded article of manufacture comprising polyethylene having an “a” parameter of up to about 0.40 and wherein the blow molded article comprises a 60° specular gloss of at least about 40%.
2. The article of manufacture of claim 1 wherein the “a” parameter ranges from about 0.10 to about 0.40.
3. The article of manufacture of claim 1 wherein the “a” parameter ranges from about 0.10 to about 0.20.
4. The article of manufacture of claim 1 wherein the polyethylene is metallocene polyethylene.
5. The article of manufacture of claim 1 , wherein the polyethylene has a molecular weight distribution of from about 2 to about 5.
6. The article of manufacture of claim 2 , wherein the polyethylene has a molecular weight distribution of from about 2 to about 5.
7. The article of manufacture of claim 3 , wherein the polyethylene has a molecular weight distribution of from about 3 to about 4.
8. The article of manufacture of claim 2 having a 60° specular gloss of from about 40% to about 80%.
9. The article of manufacture of claim 3 having a 60° specular gloss of from about 60% to about 80%.
10. The article of manufacture of claim 1 , further comprising one or more pigments combined with the polyethylene.
11. The article of manufacture of claim 8 , further comprising one or more pigments combined with the polyethylene.
12. The article of manufacture of claim 9 , further comprising one or more pigments combined with the polyethylene.
13. The article of manufacture claim 1 further comprising one or more additional polymer resins.
14. The article of manufacture of claim 1 , further comprising up to about 50% by weight of one or more additional polymer resins based on a total weight of the article of manufacture.
15. The article of manufacture of claim 1 , further comprising up to about 25% by weight of one or more additional polymer resins based on a total weight of the article of manufacture.
16. The article of manufacture of claim 1 , further comprising up to about 10% by weight of one or more additional polymer resins based on a total weight of the article of manufacture.
17. The article of manufacture of claim 13 , wherein the polyethylene is in an outer layer and additional polymer resin is in inner layer.
18. The article of manufacture of claim 13 wherein the polyethylene and the additional polymer resin are uniformly blended throughout the article.
19. The article of manufacture of claim 18 where the polyethylene is metallocene polyethylene and the additional polymer resin is a non-metallocene polymer resin.
20. The article of manufacture of claim 4 , having an outer layer and an inner layer, wherein the outer layer comprises the metallocene polyethylene and the inner layer consists essentially of one or more polymers other than metallocene polyethylene.
21. The article of manufacture of claim 1 , being selected from a group comprising a bottle, a container, a cup, a tray, a pallet, a toy, a film, a sheet, and a pipe.