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:
Nov. 25, 2025
Filed:
Mar. 15, 2023
Sichuan Huili Industry Co., Ltd., Sichuan, CN;
Jinzhi Bai, Sichuan, CN;
Wanling Lan, Sichuan, CN;
Yan Jiang, Sichuan, CN;
Daiguo Zhao, Sichuan, CN;
Xiaocong Pu, Sichuan, CN;
Daiqun Yuan, Sichuan, CN;
Xinxing Zhu, Sichuan, CN;
Zhongming Li, Sichuan, CN;
Sichuan Huili Industry Co., Ltd., Sichuan, CN;
Abstract
The present disclosure discloses the composite film of oral liquid pharmaceutical packaging and the preparation method, the composite film comprises a polyester layer, an aluminum foil layer and a heat-sealing layer; the polyester layer and the aluminum foil layer, and the aluminum foil layer and the heat-sealing layer are both bonded with an adhesive agent; the adhesive agent is an aqueous polyurethane prepared from an aqueous polyurethane emulsion, citric acid, acetic acid and zirconium carbonate amine with a mass ratio of 100:1:1:10˜15. The present disclosure adopts carboxylic acid type aqueous polyurethane emulsion, citric acid, acetic acid and zirconium carbonate amine to prepare aqueous polyurethane, the zirconium metal can form stable complex system with citric acid, acetic acid and aqueous polyurethane emulsion, so that aqueous polyurethane emulsion can be demulsified and cured rapidly, shortening curing time, reducing curing temperature.