Non-destructive testing method for tightness degree of small cigarette box packaging

US11927504B2 · kind B2 · utility

Assignee

• ZHENGZHOU TOBACCO RESEARCH INSTITUTE OF CNTC · CN

Inventors

• Bin Li · Beijing, CN
• Yue Sun · Zhejiang, CN
• Le Wang · Beijing, CN
• Guangyang Qiu · Zhengzhou, CN
• Mingjian Zhang · Zhengzhou, CN
• Ran Chen · Fremont, US
• Ke Zhang · Beijing, CN
• Nan Deng · Hefei, CN

Key dates

• Filing date: Jul 22, 2020
• Grant date: Mar 12, 2024
• Expiry date: Aug 25, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M3/3218
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The application proposes a non-destructive testing method for the sealing degree of the small cigarette box packaging, which includes placing the small cigarette box to be tested in an airtight chamber, using a balance cabin to quickly form a stable negative pressure in the airtight chamber; The pressure change of the sealed chamber is continuously measured until equilibrium, and the data model is analyzed and established by using Darcy's law, Fick's diffusion law and the physical process of molecular kinetic theory. Through the non-destructive testing method for the sealing degree of the small cigarette box packaging of the present invention, the traditional destructive measurement (damaged small box packaging) for measuring the sealing degree of cigarette small box is changed into non-destructive testing; The test results have specific physical meaning; The test time of a single sample is reduced to ⅕ of the time of destructive test.