Sliding film rheometer
US4466274A · kind A · utility
6Cited by
1References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jun 28, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Jun 28, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sliding film rheometer for measuring the viscosity of a molten polymer comprising a measuring cell containing a molten polymer, the cell having a rectangular slit through which is passed a rectangular shaped tape at a constant rate and strain gauges connected to the measuring cell for measuring the shear stress and normal stress produced by pulling the rectangular shaped tape through the molten polymer and through the slit from which the viscosity is calculated. The viscosity measurement provides useful data for obtaining optimum extrusion of said molten polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.