公开(公告)号：US5483873A

公开(公告)日：1996-01-16

申请号：US205958

申请日：1994-03-02

申请人： Pekka Koivukunnas ,  Harri Kuosa ,  Jussi Tuomela ,  Markku Ellila ,  Mikko Tani

发明人： Pekka Koivukunnas ,  Harri Kuosa ,  Jussi Tuomela ,  Markku Ellila ,  Mikko Tani

IPC分类号： D21G1/00 ,  D21G1/02

CPC分类号： D21G1/0093

摘要： A paper web is passed through a calendering nip that is formed between a roll which has been provided with a soft face and a heatable hard roll. The heatable roll is heated so as to plasticize the surface layer of the paper web that is placed at the side of the heatable roll, preferably so that the temperature of the surface layer in the calendering nip exceeds the glass-transition temperatures of the polymers contained in the paper. Before entering into the calendering nip, the paper web is moistened, so as to lower the glass-transition temperatures of the polymers contained in the paper, and pre-heated. The pre-heating of the paper web is carried out by bringing the paper web into contact with the heatable roll before the web enters the calendering nip and by, before the calendering nip, feeding steam or water onto the face of the paper web that is placed at the side of the heatable roll so as to improve the transfer of heat from the hot roll to the paper web.

摘要翻译： 纸幅通过形成在已经设置有软面的辊和可加热硬质辊之间的压延辊隙。 可加热辊被加热以使放置在可加热辊一侧的纸幅的表面层发生塑化，优选地使得压延辊隙中的表面层的温度超过包含的聚合物的玻璃化转变温度 在论文中。 在进入压延辊隙之前，纸幅被润湿，以降低包含在纸中的聚合物的玻璃化转变温度并预热。 纸幅的预热通过在纸幅进入压延辊隙之前使纸幅与可加热辊接触来进行，并且在压延辊隙之前，将蒸汽或水输送到纸幅的表面上 放置在可加热辊的侧面，以便改善从热辊到纸幅的热传递。

公开(公告)号：US06461687B2

公开(公告)日：2002-10-08

申请号：US09804315

申请日：2001-03-12

申请人： Juhani Vestola ,  Kari Niemi ,  Juha Wahlroos ,  Pentti Lehtonen ,  Jorma Majava ,  Jussi Tuomela ,  Harri Kuosa

发明人： Juhani Vestola ,  Kari Niemi ,  Juha Wahlroos ,  Pentti Lehtonen ,  Jorma Majava ,  Jussi Tuomela ,  Harri Kuosa

IPC分类号： C23C410

CPC分类号： D21F3/08 ,  D21G1/0246 ,  Y10T428/2933

摘要： A roll for use in the manufacture of paper and board, a press roll, in particular a center roll in a press, a backup roll for an extended-nip press roll, a hot press roll, or equivalent, which is in direct contact with a wet paper web, or a calender roll, a method for manufacturing the same and a coating composition therefor including an adhesion layer arranged on the frame part of the roll and a ceramic layer arranged on the adhesion layer. The ceramic layer has a thickness of from about 100 &mgr;m to about 2000 &mgr;m and includes from about 50% to about 95% by weight of Cr2O3 and from about 3% to about 50% by weight of TiO2, or from about 50% to about 80% by weight of Al2O3 and from about 20% to about 50% by weight of ZrO2, or exclusively Al2TiO5. The outer face of the ceramic layer is finished until the roughness Ra is from about 0.2 &mgr;m to about 2.0 &mgr;m and/or the porosity of the outer face of the roll is from about 1% to about 20%. In addition to or instead of TiO2, the ceramic layer may contain oxides of aluminum, silicon, zirconium, magnesium, manganese, tin, tungsten and mixtures thereof.

摘要翻译： 用于制造纸和纸板的辊，压辊，特别是压机中的中心辊，用于延伸压辊压辊的支承辊，热压辊或等效物，其直接与 湿纸幅或压光辊，其制造方法及其涂料组合物，包括布置在辊的框架部分上的粘合层和布置在粘合层上的陶瓷层。 陶瓷层的厚度为约100μm至约2000μm，并且包括约50重量％至约95重量％的Cr 2 O 3和约3重量％至约50重量％的TiO 2，或约50重量％至约50重量％ 80重量％的Al 2 O 3和约20重量％至约50重量％的ZrO 2，或仅由Al 2 TiO 5构成。 陶瓷层的外表面完成，直到粗糙度Ra为约0.2μm至约2.0μm，和/或辊的外表面的孔隙率为约1％至约20％。 除了或代替TiO 2，陶瓷层可以含有铝，硅，锆，镁，锰，锡，钨的氧化物及其混合物。