Title:
FRESHNESS-RETAINING BAG AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2019/198809
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a freshness-retaining bag making it possible to keep contents fresh for a long time. Provided is a freshness-retaining bag comprising a bonding region 105 that is 5 to 15 mm wide, where two ends 110a, 110b of a film have been superimposed and bonded. The bonding region includes: a plurality of ultrasonically welded sections 120 having ends bonded to one another; and non-bonded sections 130 which are arranged between adjacent ultrasonically welded sections and where ends of the film have been superimposed but not bonded to one another. The non-bonded sections constitute air passages creating communication between an interior space and the exterior, and the air passages have a width W that satisfies 0.2 mm ≤ W ≤ 3 mm and a length L that satisfies 20 mm ≤ L ≤ 50 mm.
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Inventors:
WATANABE TORU (JP)
Application Number:
PCT/JP2019/015936
Publication Date:
October 17, 2019
Filing Date:
April 12, 2019
Export Citation:
Assignee:
W & CO (JP)
International Classes:
B65D81/26; B31B70/66; B65B51/16; B65B51/22; B65D33/01
Domestic Patent References:
| WO2018034344A1 | 2018-02-22 |
Foreign References:
| JP2018016403A | 2018-02-01 | |||
| JP2017186049A | 2017-10-12 | |||
| JP2014112533A | 2014-06-19 | |||
| JP3027689U | 1996-08-13 | |||
| JP3059788B2 | 2000-07-04 | |||
| JPH1035619A | 1998-02-10 |
Attorney, Agent or Firm:
TANAKA Shinichiro et al. (JP)
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