Belt for shoe press
US6530854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2001 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Mar 24, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2457
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A shoe press belt for papermaking is composed of heat-resistant base and resin layers, the resin layer containing a filler for either increasing or decreasing its thermal conductivity. The resin layers do not soften at high temperatures, and consequently the dewatering grooves do not deform during the pressing operation. Improved performance is observed both with both types of fillers. In one case external heat is prevented from entering the belt, and in the other case, the resin layers of the belt are not adversely affected by external heat even when they permit entry of heat. The resin layer may be composed of sublayers, some having filler, with the outer layer preferably free of filler so that the surface characteristics of the belt are unaffected. The sublayers may have fillers with different thermal conductivities, proceeding progressively from low to high or from high to low, for improved control over belt temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.