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Patent Searching and Data


Title:
PACKAGING BAG THAT UNIDIRECTIONALLY EXHAUSTS GAS
Document Type and Number:
WIPO Patent Application WO/2022/111638
Kind Code:
A1
Abstract:
A packaging bag that unidirectionally exhausts a gas, comprising: a bag body (10), the body being sheet-shaped and provided with an accommodating cavity (10a) for accommodating articles; and pressure relief valves (20), the valves being like membranes, and multiple pressure relief valves (20) being provided on the bag body (10), and the bag body (10) being integrally formed with the pressure relief valves (20). The pressure relief valves (20) each comprise a breakable part (21) having a notch (211) and a one-way exhaust valve film (22) defined on an inner side of the breakable part (21). The bag body (10), the breakable parts (21) and the one-way exhaust valve films (22) are connected, and the one-way exhaust valve films (22) are connected to the bag body (10) at the notch (211) positions. When the internal pressure of the accommodating cavity (10a) reaches a threshold, the breakable parts (21) break, and the one-way exhaust valve films (22) are opened outwards to release the internal pressure. The packaging bag can effectively reduce the possibility of contamination of articles within the packaging bag caused by impurities carried by external gas.

Inventors:
SUN JIABIN (CN)
SUN XINGLUN (CN)
SUN XINGHANG (CN)
Application Number:
PCT/CN2021/133558
Publication Date:
June 02, 2022
Filing Date:
November 26, 2021
Export Citation:
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Assignee:
SUN JIABIN (CN)
SUN XINGLUN (CN)
SUN XINGHANG (CN)
International Classes:
B65D33/01; B65D30/02
Foreign References:
CN112478422A2021-03-12
CN111788071A2020-10-16
JP2011031949A2011-02-17
US20060076058A12006-04-13
EP2719637A12014-04-16
KR20100119355A2010-11-09
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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