	US 12,478,550 B2
	Composite film of oral liquid pharmaceutical packaging and preparation method
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); and Zhongming Li, Sichuan (CN)
Assigned to Sichuan Huili Industry Co., Ltd., Sichuan (CN)
Filed by Sichuan Huili Industry Co., Ltd., Sichuan (CN)
Filed on Mar. 15, 2023, as Appl. No. 18/184,398.
Claims priority of application No. 202310002115.3 (CN), filed on Jan. 3, 2023.
Prior Publication US 2024/0216219 A1, Jul. 4, 2024
Int. Cl. A61J 1/10 (2006.01); A61J 1/14 (2023.01)

CPC A61J 1/10 (2013.01) [A61J 1/1468 (2015.05)]

11 Claims

1. A composite film of oral liquid pharmaceutical packaging, the composite film comprising a polyester layer, an aluminum foil layer and a heat-sealing layer; wherein

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 a mixture of aqueous polyurethane emulsion, citric acid, acetic acid, and zirconium carbonate amine; and

the aqueous polyurethane emulsion is a carboxylic acid type, and the aqueous polyurethane emulsion, citric acid, acetic acid, and zirconium carbonate amine mixture are 100:1:1:10˜15 according to mass ratio.