公开(公告)号：US20190218716A1

公开(公告)日：2019-07-18

申请号：US16334371

申请日：2017-09-20

申请人： Hans Hoglund ,  Gunilla Pettersson ,  Sven Norgren ,  Per Engstrand

发明人： Hans Hoglund ,  Gunilla Pettersson ,  Sven Norgren ,  Per Engstrand

IPC分类号： D21F3/02 ,  D21H11/02 ,  D21H11/08 ,  D21H11/10

CPC分类号： D21F3/0281 ,  D21H11/02 ,  D21H11/08 ,  D21H11/10

摘要： A method of producing a paper or paperboard product having at least one ply comprising high yield pulp (HYP), comprising the steps of: —providing a furnish comprising at least 50% of high yield pulp (HYP) of a total pulp content in said furnish, said high yield pulp being produced with a wood yield above 85%; —dewatering the furnish to form a moist web and pressing said moist web to a dry solids content of at least 40-70%; and —densifying the moist web to a density above 600 kg/m3 in a press nip of a paper machine at a temperature above a softening temperature of water-saturated lignin comprised in said high yield pulp to provide a paper or paperboard product, containing at least 30% high yield pulp (HYP) of a total pulp content of said product.

公开(公告)号：US11299853B2

公开(公告)日：2022-04-12

申请号：US16334371

申请日：2017-09-20

申请人： Hans Hoglund ,  Gunilla Pettersson ,  Sven Norgren ,  Per Engstrand

发明人： Hans Hoglund ,  Gunilla Pettersson ,  Sven Norgren ,  Per Engstrand

IPC分类号： D21F3/02 ,  D21H11/02 ,  D21H11/08 ,  D21H11/10

摘要： A method of producing a paper or paperboard product having at least one ply comprising high yield pulp (HYP), comprising the steps of: —providing a furnish comprising at least 50% of high yield pulp (HYP) of a total pulp content in said furnish, said high yield pulp being produced with a wood yield above 85%; —dewatering the furnish to form a moist web and pressing said moist web to a dry solids content of at least 40-70%; and —densifying the moist web to a density above 600 kg/m3 in a press nip of a paper machine at a temperature above a softening temperature of water-saturated lignin comprised in said high yield pulp to provide a paper or paperboard product, containing at least 30% high yield pulp (HYP) of a total pulp content of said product.

公开(公告)号：US20080023164A1

公开(公告)日：2008-01-31

申请号：US11665229

申请日：2005-10-13

申请人： Mats Fredlund ,  Lars Wagberg ,  Hans Hallgren ,  Hans Hoglund ,  Gunilla Pettersson

发明人： Mats Fredlund ,  Lars Wagberg ,  Hans Hallgren ,  Hans Hoglund ,  Gunilla Pettersson

IPC分类号： D21H11/20 ,  D21H17/26 ,  D21H17/29 ,  D21H23/06

CPC分类号： D21H11/20 ,  D21C9/002 ,  D21H17/26 ,  D21H17/29 ,  D21H23/04

摘要： The present invention concerns a process for producing a paper or board product, which process comprises providing a furnish comprising fibers; subjecting a first portion (1) of the furnish to polymer treatment, in which polymers are added to the furnish in at least two steps; blending said polymer treated first portion with an untreated second portion (2) of the furnish; and dewatering the furnish on a wire to form a fiber web. By treating only a portion of the furnish, the strength of the resulting paper or board product is significantly improved whereas the bulk remains substantially unaffected. The invention also concerns a paper or board product produced according to the process.

摘要翻译： 本发明涉及用于生产纸或纸制品的方法，该方法包括提供包含纤维的配料; 对所述配料的第一部分（1）进行聚合物处理，其中将聚合物以至少两个步骤添加到所述配料中; 将所述聚合物处理的第一部分与所述配料的未处理的第二部分（2）共混; 并且将配件在线材上脱水以形成纤维网。 通过仅处理配料的一部分，所得到的纸或板产品的强度显着提高，而体积基本上不受影响。 本发明还涉及根据该方法生产的纸或纸板产品。