The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2024
Filed:
Nov. 12, 2021
Northeast Forestry University, Harbin, CN;
Lijuan Wang, Harbin, CN;
Wenrui Chi, Harbin, CN;
Abstract
A press-sealing method of anionic polysaccharide films is disclosed, aiming to solve the technical problem that the existing polysaccharide films are difficult to be press-sealed into a bag. The press-sealing method includes following steps. (1) A chitosan quaternary ammonium salt solution is prepared. (2) An anionic polysaccharide film is pretreated. (3) The chitosan quaternary ammonium salt solution is applied to a part to be sealed between two anionic polysaccharide films, and the part be sealed is pressed for 1˜2 s under conditions of a pressure of 0.3˜0.5 MPa and a temperature of 20˜30° C. to complete the press-sealing. The press-sealing strength of the anionic polysaccharide films after press-sealing is 1.38±0.26˜6.95±0.95 N/15 mm. It is used for packaging beef tallow and other foods, can effectively prolong the shelf life of foods, and can be used in the field of food packaging.