Polylactic acid devolatilization evaporator
US11097248B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 29, 2020 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Dec 29, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to the field of devolatilization, and discloses a polylactic acid devolatilization evaporator, which comprises: a container comprising a cylinder; an agitating shaft coaxial with the cylinder; an agitating belt connected to the agitating shaft and arranged in a spiral shape around the central axis of the cylinder, comprising an outer belt surface facing the inner circumferential surface of the cylinder and spaced apart from the inner circumferential surface of the cylinder. With the above technical scheme, the agitating belt makes the materials distributed more uniformly on the inner circumferential surface of the cylinder and form a thin layer in uniform thickness, thereby avoids agglomeration of the materials, facilitates uniform heating of the materials, avoids deterioration (e.g., darkened color) of the materials owing to non-uniform heating of the materials and excessive retention time in a high-temperature environment, and improves product quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.