Modified polyketone resin and preparation method thereof, and nylon composite film and preparation method and application thereof

Abstract

The invention belongs to the technical field of nylon films, and particularly relates to modified polyketone resin and a preparation method thereof, a nylon composite film and a preparation method andapplication thereof. The invention provides modified polyketone resin. The modified polyketone resin is prepared from the following raw materials: 96.0 to 99.6 percent of polyketone copolymer, 0.2 to2.0 percent of anti-aging agent and 0.2 to 2.0 percent of rare earth compound. A polyketone copolymer is modified by an anti-aging agent and a rare earth compound, so that the thermal stability of the modified polyketone resin is improved. According to the invention, a nylon composite film is prepared by compounding the modified polyketone resin and the nylon resin, so that the gas barrier property of the nylon composite film is improved, and even the nylon composite film still has relatively high gas barrier property under a relatively high temperature condition; meanwhile, under the combined action of the modified polyketone resin and a waterproof agent, the water absorption performance of the nylon composite film is reduced, and the size stability of the nylon composite film is improved.

Description

technical field [0001] The invention belongs to the technical field of nylon films, and in particular relates to a modified polyketone resin and a preparation method thereof, a nylon composite film, a preparation method and applications thereof. Background technique [0002] Biaxially oriented nylon film (BOPA) is a biaxially oriented film with the third largest production volume after biaxially oriented polypropylene film and biaxially oriented polyester film. BOPA has high tensile strength, cooking resistance, and puncture resistance. , strong flexibility, excellent optical performance, excellent chemical resistance and other characteristics, it is widely used in food packaging, daily chemical packaging, pharmaceutical packaging, electronic packaging and other fields. However, there are a lot of hydrogen bonds in the nylon molecular chain, so it is easy to absorb water, which will cause BOPA to soften, affect the dimensional stability of the product, and easily produce def...

AI Technical Summary

Problems solved by technology

However, there are a lot of hydrogen bonds in the nylon molecular chain, so it is easy to absorb water, which will cause BOPA to soften, affect the stability of product size, and easily produce defective products in subsequent printing, bag making and other processes

At the same time, although the barrier performance of BOPA is higher than that of ordinary film materials such as polyethylene and polypropylene, it still cannot meet the packaging needs in some special application fields, such as packaging canned fruits and sauces, so the barrier performance of biaxially oriented nylon film and dimensional stability needs to be further improved

[0003] Chinese patent CN 106739322B discloses a low water absorption BOPA and its preparation method. The patent uses PA66 and PA12 to modify nylon film to reduce its water absorption and improve its barrier performance, but its dimensional change rate is still high

However, polyketone copolymer also has some fatal defects, such as its low thermal stability, especially under high shear, it is prone to degradation, which affects various properties of film products, such as mechanical properties, barrier properties, etc.

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