Use of press cover, press cover, and polyurethane for making press roll, shoe press, and press cover

摘要

The present invention relates toA press cover comprising a plurality of polymer layersPolymer layerMade from polyurethaneOr polyurethanePolyurethane isIt is obtained by the reaction of isocyanate with polyol and crosslinking agent.The outer most radially outer polymer layer viewed from the longitudinal axis of the press cover as a referenceA radial inner polymer layer is provided with reference to the longitudinal axis of the press cover as a reference.Polyurethane of the radial outermost polymer layer is14 or 13 - bis (isocyanato methyl) cyclohexane (h6xdi) as isocyanatePolyurethane inside the radial inner polymer layer44 - diphenylmethane diisocyanate (MDI)Toluene4-diisocyanate (TDI)Or the mixture of these compounds as isocyanatePolytetramethylene ether glycol (PTMEG) as polyolFour more4 - methylene bis (3-chloro-2)6-diethylanilineDimethylthiotoluene amine (dmmtda)Or, these mixtures are included as crosslinking agents.It relates to a press cover.The present invention relates to the use of press covers in press rolls, shoe presses and shoe presses.