High-shrinkage biaxially-oriented nylon 6 film with hot shrinkage reaching 8-10% and manufacture method thereof

Abstract

The invention discloses high-shrinkage biaxially-oriented nylon 6 film with hot shrinkage reaching 8-10% and a manufacture method thereof, wherein the high-shrinkage biaxially-oriented nylon 6 film comprises 78-82 parts of nylon 6, 17-21 parts of special nylon which is one, or a combination of any, of MXD6, PA612 and PA610, 0.3-0.7 part of an anti-adhesion agent which is silicon dioxide or calcium carbonate or magnesium carbonate. The biaxially-oriented nylon 6 film manufactured according to the material ratio herein through the manufacture method reaches 8-10% in hot shrinkage, and has the advantages of high tensile strength, high puncture strength and good impact strength, and the production of high-shrinkage film with hot shrinkage reaching 8-10% from nylon is achieved.

Description

Technical field [0001] The invention belongs to the technical field of nylon films, and particularly relates to a high-shrinkage biaxially stretched nylon 6 film and a manufacturing method thereof. Background technique [0002] Biaxially oriented nylon 6 film is a versatile packaging material that can be used for food, medical, industrial and other packaging. It has high strength, high impact strength, and good barrier properties to gases (oxygen, nitrogen, carbon dioxide). [0003] During the use of biaxially oriented nylon 6 film, in order to ensure the dimensional stability of the packaging bag, the heat shrinkage rate is generally controlled at about 1%. This is to ensure that the pattern is aligned in the subsequent printing, and the high heat shrinkable film is used for packaging food After that, there must be a lot of shrinkage to eliminate the air between the packaging and the food. At present, the packaging materials with higher requirements for shrinkage basically use pol...

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Problems solved by technology

[0003] During the use of biaxially oriented nylon 6 film, in order to ensure the dimensional stability of the packaging bag, its thermal shrinkage rate is generally controlled at about 1%. Finally, there must be a lot of shrinkage to remove the air between the packaging and the food. At present, the packaging materials that have higher requirements for shrinkage basically use polyethylene and polypropylene films, but their barrier properties are not as good as nylon films. Nylon will be stretched during stretching. A large internal stress is generated, and after stretching, it must be shaped to ensure the dimensional stability of the product. It is difficult to achieve a nylon film with a heat shrinkage rate of more than 5% in the existing technology

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