公开(公告)号：US20220120038A1

公开(公告)日：2022-04-21

申请号：US17427884

申请日：2020-03-17

申请人： NIPPON PAPER INDUSTRIES CO., LTD. ,  JUJO THERMAL OY

发明人： Masaaki FUKUNAGA ,  Hiroshi KOYAMOTO ,  Yuri OISHI ,  Masatsugu KATO ,  Akio MIYAJIMA ,  Masashi OKAMOTO

IPC分类号： D21H19/84 ,  B65D65/40 ,  D21H19/36

摘要： An object is to provide a paper barrier material resistant to fractures due to water vapor expansion when heated. As a solution, a paper barrier material is provided, which is characterized in that it comprises a gas barrier layer, a seal layer, a paper base material, and a pigment coating layer, being stacked in this order, wherein the laminate consisting only of the paper base material and pigment coating layer has an air permeation resistance of 2,500 seconds or lower as measured based on JAPAN TAPPI No. 5-2: 2000.

公开(公告)号：US20190308786A1

公开(公告)日：2019-10-10

申请号：US16308778

申请日：2017-09-29

申请人： NIPPON PAPER INDUSTRIES CO., LTD.

发明人： Masashi OKAMOTO ,  Yuri OISHI ,  Masatsugu KATO ,  Masaaki FUKUNAGA ,  Akio MIYAJIMA ,  Hiroshi KOYAMOTO

IPC分类号： B65D65/40 ,  D21H21/16 ,  D21H19/82 ,  D21H19/24

摘要： An object is to provide a paper barrier material having excellent gas barrier property as well as excellent water vapor barrier property, wherein such paper barrier material is suitable for packaging applications such as food packaging materials, containers, and cups. The means for achieving the object is to provide a paper barrier material characterized in that it meets the conditions in (1) to (3) below: (1) the water vapor permeability at 40±0.5° C. in temperature and 90±2% in relative humidity is 3 g/m2·day or below; (2) the oxygen permeability at 23° C. in temperature and 0% in relative humidity is 3 ml/m2·day·atm or below; and (3) the oxygen permeability at 23° C. in temperature and 85% in relative humidity is 3 ml/m2·day·atm or below.