Title:
紙管
Document Type and Number:
Japanese Patent JP6734054
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a paper tube hard to burn.SOLUTION: There is provided a paper tube formed at a state that a plurality of inorganic papers are laminated. A main component of the inorganic papers is preferably magnesium silicate and a metallic sheet or a glass paper are preferably put between laminated inorganic papers. Further a plurality of composite substrates where the metallic sheet or the glass paper are put between 2 inorganic papers are preferably laminated. It is preferable that total heat generation amount for 20 minutes form initiation of heating in a cone calorie test is 8 MJ/m, maximum heat generation speed is continued without excess of 200 kW/mfor 10 sec. or more during 20 min. after initiation of heating and it has incombustibility without crack or hole penetrating from an outside to an inside, which is harmful on fireproof for 20 min. after initiation of heating.SELECTED DRAWING: None
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Inventors:
Jun Mori
Seiji Takahashi
Hiroshi Imai
Seiji Takahashi
Hiroshi Imai
Application Number:
JP2016004784A
Publication Date:
August 05, 2020
Filing Date:
January 13, 2016
Export Citation:
Assignee:
Toppan Printing Co., Ltd.
Taiga Rex Corporation
Nippon Kako Kikai Co., Ltd.
Taiga Rex Corporation
Nippon Kako Kikai Co., Ltd.
International Classes:
B32B1/08; B32B15/12; B32B18/00; B32B29/00; D21H27/30
Domestic Patent References:
| JP63227333A | ||||
| JP7127159A | ||||
| JP6027130U |
Attorney, Agent or Firm:
Ichi Hirose
Toru Miyasaka
Toru Miyasaka