公开(公告)号：US20150337493A1

公开(公告)日：2015-11-26

申请号：US14758708

申请日：2013-12-30

Applicant: Stora Enso OYJ

Inventor： Isto HEISKANEN ,  Henri KASTINEN ,  Anna KAUPPI ,  Jukka KANKKUNEN ,  Lars AXRUP ,  Cecilia LAND HENSDAL ,  Heidi SAXELL ,  Kaj BACKFOLK

IPC: D21H17/00 ,  D21H11/18 ,  D21H11/04 ,  D21C9/00

CPC classification number: D21C9/007 ,  C08B15/08 ,  C08L1/04 ,  D21D1/20 ,  D21H11/04 ,  D21H11/18 ,  D21H17/005

Abstract: The invention relates to methods of producing microfibrillated cellulose (MFC). According to the invention a fibrous pulp suspension is fibrillated mechanically at a consistency of less than 12.5%, dewatered to raise the consistency of the fibrillated suspension to at least 12.5%, and then subjected in the dewatered condition to further fibrillation. Alternatively an initially fibrillated fibrous pulp suspension may be dewatered and fibrillated in the dewatered condition, after which these dewatering and fibrillating steps are repeated one or more times so that pulp consistency is increased for each fibrillation step. The goals of raising the consistency between subsequent fibrillations are energy saving and an increased aspect ratio in MFC. The invention even comprises uses of the MFC product, e.g. as an additive for papermaking furnish or injection molded plastic composites.

Abstract translation: 本发明涉及微纤化纤维素（MFC）的制造方法。 根据本发明，纤维纸浆悬浮液以小于12.5％的稠度机械原纤化，脱水以将原纤化悬浮液的稠度提高至至少12.5％，然后在脱水条件下进一步原纤化。 或者，最初原纤化的纤维纸浆悬浮液可以在脱水条件下脱水和原纤化，之后将这些脱水和原纤化步骤重复一次或多次，以使每个原纤化步骤的纸浆稠度增加。 提高后续原纤化之间的一致性的目标是在MFC中节能和增加的纵横比。 本发明甚至包括MFC产品的用途，例如， 作为造纸配料或注塑塑料复合材料的添加剂。