Nylon film and method for preparing same

Abstract

The invention discloses a nylon film. Raw materials for the nylon film include nylon resin prepared from pentamethylene diamine and aliphatic dibasic acid. At least one of the pentamethylene diamine and the aliphatic dibasic acid is prepared by the aid of biological processes. The invention further discloses a method for preparing the nylon film. The nylon film and the method have the advantages that the thickness of the biaxially oriented nylon film ranges from 8 micrometers to 12 micrometers, the nylon film is high in gas barrier property, flexibility and tear resistance and excellent in tensile strength, puncture strength, oil resistance and resistance to different types of grease, can be applied to high-temperature boiling bags, vacuum packages for frozen meat, packaging bags for fresh meat, packaging bags for foods with cheese aroma and packaging cover materials, and further can be compounded with PET (polyethylene terephthalate), PE (polyethylene) and PP (polypropylene) resin and the like to prepare multilayer films, and accordingly the nylon film and the method have broad industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a nylon film and a preparation method thereof. Background technique [0002] Biaxially stretched nylon film has various excellent physical and chemical properties that many other films do not have, such as: high gas barrier and good oil barrier performance, which can block various gases, including oxidizing gases such as oxygen, from penetrating into the film And the unique smell of the items in the packaging bag leaks out of the film, preventing the items in the packaging bag from being oxidized and degraded or changing the taste, and preventing the oil in the packaging bag from seeping out to pollute other items and the environment. Foods packaged with BOPA film have a longer shelf life than other products. The resin film is more than doubled in length. Stretch nylon film also has good puncture resistance and a wide range of temperature resistance, especi...

AI Technical Summary

Problems solved by technology

[0003] The current resin chips for the production of nylon films are basically made of petroleum derivatives as raw materials. For example, the two varieties of nylon 6 and nylon 66 with the largest market share in the nylon market, their raw materials caprolactam and adipic acid are obtained through benzene homologues. It is produced through a series of reactions such as hydrogenation and reoxidation, while hexamethylenediamine is prepared by first synthesizing adiponitrile from butadiene or acrylonitrile and then through catalytic hydrogenation. The whole synthesis process is complicated and there is some pollution.