Food packaging film and its manufacturing method

Patent Name A Food Packaging Film and Its Manufacturing Method Patent Applicant Zhu Chunying Principal Applicant Address 100029 Zun Yi 1103, Building 2, No. 29, North Sanhuan Middle Road, Xicheng District, Beijing, China Inventor Zhu Chunying Application (Patent) No. 200510000406.0 Date of Application 2005.01 .07 Approval Date Approval Notice No. 1736813 Audit Notice Date 2006.02.22 Instruction CD No. D0608-1 Main Classification No. B65D65/40(2006.01) I No. B65D65/40(2006.01)I; B32B27/00(2006.01)I; B29C49 /04(2006.01)I;B29C47/06(2006.01)I;B29C55/28(2006.01)I division Original application number Priority item 2004.1.9 CN 200410000249.9 Abstract The present invention provides a food packaging film product and its manufacturing method Specifically, it is a kind of degradable composite membrane made of biodegradable nano PA polymer as a barrier material. The composite film has a layered structure composed of at least two outer layers and one intermediate layer, wherein at least one layer is a barrier layer, the barrier layer is a degradable nano PA polymer, and the other layer is a degradable polyolefin or polyolefin. . Compared with the application of PVDC for manufacturing high barrier films, the present invention overcomes the disadvantages of difficult PVDC processing, high cost, complex dry process, large environmental pollution, and difficulty in recycling. By adopting nano PA as a main production high barrier packaging film, It has the same high barrier effect as PVDC. Claim 1, a food packaging film, characterized in that the packaging film is a degradable composite film prepared by using a degradable nano PA polymer as a barrier material, and the composite film has at least two The layered structure consisting of a layer and an intermediate layer, wherein at least one layer is a barrier layer, the barrier layer is a degradable nano PA polymer, and the other layer is a degradable polyolefin or a polyolefin.