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:
Oct. 01, 2024
Filed:
Apr. 18, 2024
Northeast Forestry University, Harbin, CN;
Lijuan Wang, Harbin, CN;
Yuping Ning, Harbin, CN;
Na Wei, Harbin, CN;
Zijing Pan, Harbin, CN;
Jian Li, Harbin, CN;
NORTHEAST FORESTRY UNIVERSITY, Harbin, CN;
Abstract
A preparation method of a high-barrier antibacterial flame-retardant food packaging film solves problems that an existing food packaging film is non-degradable, poor in preservation effect, and inflammable. The preparation method includes: performing blending reaction on chitosan quaternary ammonium salt and phytic acid to generate a polyelectrolyte complex; and adding the polyelectrolyte complex into a polyvinyl alcohol solution, heating the polyvinyl alcohol solution added with the polyelectrolyte complex to obtain a film-forming solution, pouring the film-forming solution into a mold, leveling and drying the film-forming solution to obtain the high-barrier antibacterial flame-retardant food packaging film. The food packaging film has water vapor permeability in 1.82-2.58×10g·s·m·Pa, oxygen permeability in 1.63-12.31 cm·mm·Pa·day, and a value of limiting oxygen index (LOI) in 28.10%-33.33%. The food packaging film performs an instant self-extinguishing behavior after ignition; and can inhibitandwhen used in packaging.