Method for processing polyethylene
US9920172B2 · kind B2 · utility
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5References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 24, 2012 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Jan 24, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2423/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method can include consecutively batch processing at least two different polyethylene grades in pellet form in a pellet handling unit. A ratio of a melt flow index (MI) of a first polyethylene in pellet form (MIf) to a MI of a later processed polyethylene in pellet form (MIl) can be smaller than 0.30. The method can include processing an intermediate polyethylene grade in pellet form. An amount of intermediate polyethylene grade processed can be at most 1/100th of a handling capacity of the pellet handling unit. The intermediate polyethylene grade can have the same MI as the later processed polyethylene in pellet form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.