Patent name: Self-styled Plastic Bag and its production method Patent number: 9 Publication number: CN1544296
Application Date: 20D3.11.14 Opening Day: 2ooa.11.10
Applicant; Wu Nasheng The invention provides a ziplock bag made of polypropylene material, wherein the self-sealing structure of the plastic bag has semi-elliptical ring shaped female buckles with cross-shaped claw hooks at both ends and a cross-sectional shape. A two-winged asymmetric arrow-shaped buckle. The present invention also provides a method of manufacturing the polypropylene zip-lock bag, which includes a quenching step in which the formed polypropylene bag film sheet is immersed in Zo-3o°C water immediately after it exits the die. The polypropylene ziplock bag of the present invention is superior to the polyethylene plastic bag in strength, transparency, high temperature performance, heat sealability and printability. The above self-sealing structure ensures that the polypropylene zipper bag can be opened and closed freely.
Source: Chinese Packaging
