Title:
PACKAGING BAG
Document Type and Number:
WIPO Patent Application WO/2021/241569
Kind Code:
A1
Abstract:
Provided is a technique for achieving excellent peelability at a vertical seal part of a packaging bag made of a multi-layered film while reducing the risk of content leakage. According to the present invention, provided is a packaging bag comprising a tubular body constructed by forming a vertical seal part on a multi-layered film, an upper side lateral seal part, and a lower side lateral seal part, wherein: the multi-layered film comprises an inner film and an outer film which are overlaid, with the innermost layer of the multi-layered film being an easy-to-peel resin layer; the upper side lateral seal part is disposed so as to close the upper side of the tubular body; the lower side lateral seal part is disposed so as to close the lower side of the tubular body; and the vertical seal part is formed by bending the multi-layered film into a tubular shape such that the outer film is positioned on an outer surface side of the packaging bag, and by welding, at a joined part formed by overlapping an inner film portion on one end side with an inner film portion on the other end side of the multi-layered film, the inner film portions together. The packaging bag is composed of the joined part and the remaining body part, and is constructed such that the joined part is inclined toward one side edge of the body part, and the surface of the joined part on the body part side is welded to an outer surface of the body part.
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Inventors:
UESUGI TOMOHIRO (JP)
WASHIO TARO (JP)
HARA MASATO (JP)
MISAWA KOSUKE (JP)
KIMURA KAZUTO (JP)
MATSUNAGA SHINJI (JP)
WASHIO TARO (JP)
HARA MASATO (JP)
MISAWA KOSUKE (JP)
KIMURA KAZUTO (JP)
MATSUNAGA SHINJI (JP)
Application Number:
PCT/JP2021/019784
Publication Date:
December 02, 2021
Filing Date:
May 25, 2021
Export Citation:
Assignee:
KYORAKU CO LTD (JP)
International Classes:
B65D30/08; B65B9/12; B65B43/04; B65D33/00; B65D65/40; B65D75/62
Foreign References:
| JP2014218292A | 2014-11-20 | |||
| JP2012245990A | 2012-12-13 | |||
| JP2009083912A | 2009-04-23 | |||
| JP2016159932A | 2016-09-05 | |||
| JP2010036907A | 2010-02-18 | |||
| JPH10167287A | 1998-06-23 | |||
| JP2019059489A | 2019-04-18 |
Attorney, Agent or Firm:
SK INTELLECTUAL PROPERTY LAW FIRM et al. (JP)
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