Process for manufacturing a densified polymer powder, and process of melt processing a densified polymer powder
US10596727B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Oct 30, 2015 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Jun 12, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2369/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Process for manufacturing a densified polymer powder comprising compressing a polymer feed that has a bulk density of less than or equal to 240 kg/m in a roll compactor comprising at least two compaction rolls to obtain a densified polymer material, wherein a gap between the two rolls is 0.5 to 10 mm, wherein the compaction rolls operate at a speed of 3 to 30 rpm, wherein an applied pressure of the roll compactor is 0.5 to 5 MPa, and milling the densified polymer material to obtain a densified polymer powder, wherein a bulk density of the densified polymer powder is greater than or equal to 250 kg/m3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.