Compartmentalized chips with similar polymers of different viscosities for improved processability
US8231937B2 · kind B2 · utility
1Cited by
14References
15Claims
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Key dates
| Filing date | Jul 8, 2011 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Jul 8, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Compartmentalized chips of at least two chemically similar crystallizable thermoplastic polymers each having a different intrinsic viscosity placed in separate zones are disclosed. These compartmentalized chips exhibit thermal characteristics that are different from the traditional technique of homogeneously combining the two materials into the chip. These compartmentalized chips in their amorphous, crystalline and solid phase polymerized forms exhibit a longer crystallization half time than the homogeneous mixture, thus permitting faster injection cycle times when compared to an equivalent homogenous mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.