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:
Sep. 15, 2026
Filed:
Apr. 29, 2024
Zhejiang University of Science and Technology, Hangzhou, CN;
Lizheng Sha, Hangzhou, CN;
Feiyang Zhang, Hangzhou, CN;
Daliang Guo, Hangzhou, CN;
Huifang Zhao, Hangzhou, CN;
Jing Li, Hangzhou, CN;
Yinchao Xu, Hangzhou, CN;
Zhejiang University of Science and Technology, Hangzhou, CN;
Abstract
The method of the present invention specifically comprising following steps: adding a chitosan to an acetic acid solution, heating and stirring until clear, to obtain an acidic chitosan solution; then adding a palm wax and heating a resulting mixture to 80-100° C. with a constant temperature and a high-speed stirring for emulsification for 5-15 minutes; after the emulsification is completed, an obtained emulsion is quickly cooled to a room temperature. The present invention uses a single-layer coating method to prepare waterproof and oil-proof food cardboard, simplifying operation and achieving good waterproof, oil-proof, and antibacterial effects with a lower coating amount, thereby reducing production costs. When a coating amount is 5-10 g/m, a Cobbvalue can reach 5-9 g/m, an oil resistance level can reach 11-12 levels, a water contact angle can reach over 130°, and an antibacterial rate can reach over 90%.