发明公开
EP0496524A1 High purity stratified tissue and method of making same 失效
具有高纯度和用于其制备的过程层薄纸。

  • 专利标题: High purity stratified tissue and method of making same
  • 专利标题(中): 具有高纯度和用于其制备的过程层薄纸。
  • 申请号: EP92300332.1
    申请日: 1992-01-15
  • 公开(公告)号: EP0496524A1
    公开(公告)日: 1992-07-29
  • 发明人: Janda, Bruce W.
  • 申请人: JAMES RIVER CORPORATION
  • 申请人地址: Tredegar Street P.O. Box 2218 Richmond VA 23217 US
  • 专利权人: JAMES RIVER CORPORATION
  • 当前专利权人: JAMES RIVER CORPORATION
  • 当前专利权人地址: Tredegar Street P.O. Box 2218 Richmond VA 23217 US
  • 代理机构: Cropp, John Anthony David
  • 优先权: US641657 19910115
  • 主分类号: D21H27/38
  • IPC分类号: D21H27/38
High purity stratified tissue and method of making same
摘要:
A foam-formed nonlaminated stratified paper tissue 300 and method of making the same includes a first zone 301 of foam-formed paper tissue formed from a furnish which is relatively rich in hardwood fiber. A second zone 401 of foam-formed paper tissue is formed from a furnish which is relatively rich in softwood fiber. The second zone is formed unitary and entangled with the first zone to form a nonlaminated stratified paper tissue. A high softness integument is defined adjacent to an outer surface of the first zone and a substratum is defined adjacent to a surface of the second zone spaced away from the integument. The integument 320 on the outer surface of the first zone includes an enriched region 330 wherein the hardwood fiber content is greater than that obtainable in the corresponding region of a tissue obtained from furnishes having the same compositions under the same conditions but employing water-forming instead of foam-forming. The substratum 420 on the surface of the second zone includes a region enriched in softwood fiber. The enriched region 430 of substantially pure hardwood fiber provides an extremely soft and smooth surface as detected by human somatic sensibility.
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