发明公开
EP1375734A1 Bleached, strong sulfite chemical pulp, a process for the production thereof and products derived therefrom
审中-公开
漂白化学亚硫酸盐纸浆具有良好的强度，处理其生产和产品制成
- 专利标题： Bleached, strong sulfite chemical pulp, a process for the production thereof and products derived therefrom
- 专利标题（中）： 漂白化学亚硫酸盐纸浆具有良好的强度，处理其生产和产品制成
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申请号： EP02013497.9申请日： 2002-06-17
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公开(公告)号： EP1375734A1公开(公告)日： 2004-01-02
- 发明人: Geisenheiner, Andreas , Reinhard, Armin , Kordsachia, Othar , Patt, Rudolf
- 申请人： SCA Hygiene Products GmbH
- 申请人地址： Sandhofer Strasse 176 68305 Mannheim DE
- 专利权人： SCA Hygiene Products GmbH
- 当前专利权人： SCA Hygiene Products GmbH
- 当前专利权人地址： Sandhofer Strasse 176 68305 Mannheim DE
- 代理机构： HOFFMANN - EITLE
- 主分类号： D21C3/06
- IPC分类号： D21C3/06 ; D21C9/10
摘要：
The present invention relates to a process for preparing a bleached sulfite chemical pulp comprising:
delignification of chips of a lignocellulosic material in a sulfite pulping process beyond the defibration point of said material until kappa values of below 50 are reached, and
bleaching of the fibrous material thus obtained by means of a chlorine-free bleaching sequence which comprises at least one first bleaching step with a chlorine-free oxidant in the presence of a base.
The chemical pulp prepared according to this process and paper or nonwoven made from such are characterized by a high degree of brightness (at least 83%, in particular more than 86%) and high strength.
delignification of chips of a lignocellulosic material in a sulfite pulping process beyond the defibration point of said material until kappa values of below 50 are reached, and
bleaching of the fibrous material thus obtained by means of a chlorine-free bleaching sequence which comprises at least one first bleaching step with a chlorine-free oxidant in the presence of a base.
The chemical pulp prepared according to this process and paper or nonwoven made from such are characterized by a high degree of brightness (at least 83%, in particular more than 86%) and high strength.
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