Low-temperature-resistant and high-toughness packaging film material and preparation method for same

Abstract

The invention relates to a low-temperature-resistant and high-toughness packaging film material, which is divided into inner, middle and outer layers, wherein the inner layer is prepared from the following raw materials in parts by weight: 30 to 40 parts of metallocene polyethylene, 10 to 20 parts of linear low density polyethylene, 3 to 5 parts of a plastic lubricant and 2 to 3 parts of a slipping agent; the middle layer is prepared from the following raw materials in parts by weight: 30 to 40 parts of metallocene polyethylene, 60 to 70 parts of linear low density polyethylene and 3 to 5 parts of a propylene-based elastomer; the outer layer is prepared from the following raw materials in parts by weight: 30 to 40 parts of metallocene polyethylene, 10 to 15 parts of linear low density polyethylene, 3 to 5 parts of an anti-slip agent and 2 to 3 parts of an ink binder. The packaging film material has the advantages of low-temperature resistance and high toughness, and a package can be prevented from being broken at a 3m height at -20 DEG C; the performance is ensured, and meanwhile, the lowest using cost and a better packaging effect are achieved.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a packaging film material with low temperature resistance and high toughness and a preparation method thereof. Background technique [0002] Single-layer PE film has low strength, poor sealing performance, and poor weather resistance. Multi-layer co-extruded PE film has excellent performance that single-layer PE film cannot match. It has a wide range of options in the application of materials and can fully reflect different levels. It is widely used in the packaging of bulk products such as chemical raw materials, grain, and chemical fertilizers, and is suitable for the production of various heavy packaging bags, bags, and garbage collection bags. [0003] However, the existing multi-layer co-extruded PE film is not good at low temperature environment. In the north of my country, Inner Mongolia, Heilongjiang and other places use ordinary packaging bags in winter. Due to the low...

AI Technical Summary

Problems solved by technology

[0003] However, the existing multi-layer co-extruded PE film is not good at low temperature environment. In the north of my country, Inner Mongolia, Heilongjiang and other places use ordinary packaging bags in winter. Due to the low temperature, PE and PP become hard and brittle. It is easy to cause the packaging bag to break when it is impacted, thus affecting normal use