High-temperature steaming and boiling casting polypropylene film

Abstract

The invention discloses a high-temperature steaming and boiling casting polypropylene film, the high-temperature steaming and boiling casting polypropylene film is characterized in that the film is ofa three-layer structure, the three-layer structure sequentially comprises a corona layer (1), a middle layer (2) and a heat sealing layer (3) from top to bottom, wherein the corona layer (1) comprises 85-98% of block copolymerization polypropylene and 2-15% of polyolefin elastomer, the middle layer (2) comprises 85-98% of block copolymerization polypropylene and 2-15% of polyolefin elastomer, theheat sealing layer (3) comprises 78-96% of block copolymerization polypropylene, 2-15% of polyolefin elastomer and 2-7% of silicone smooth master batch, and the proportion is mass percent; in addition, the thickness ratio of the corona layer (1) to the middle layer (2) to the heat sealing layer (3) is 1:(2-4):(1-2).

Description

technical field [0001] The invention relates to the field of plastic films, in particular to a high-temperature cooking cast polypropylene film. Background technique [0002] After the food is packaged, it needs to be cooked and sterilized in a high-temperature environment. The high-temperature cooking condition is 135°C for 30 minutes. However, some traditional high-temperature cooking films cannot really meet the above conditions. Afterwards, the peel strength and heat-sealing strength will decrease to varying degrees, and some films will show poor low-temperature impact resistance, that is, the product is easy to break the bag after freezing, and some films will appear after long-term high-temperature curing. The problem of a sharp increase in the coefficient of friction will cause problems such as difficulty in moving the machine or poor opening performance after bag making during the packaging process of the customer, which seriously affects the use of the customer. ...

AI Technical Summary

Problems solved by technology

[0002] After the food is packaged, it needs to be cooked and sterilized in a high-temperature environment. The high-temperature cooking condition is 135°C for 30 minutes. However, some traditional high-temperature cooking films cannot really meet the above conditions. Afterwards, the peel strength and heat-sealing strength will decrease to varying degrees, and some films will show poor low-temperature impact resistance, that is, the product is easy to break the bag after freezing, and some films will appear after long-term high-temperature curing. The friction coefficient has risen sharply. In this way, during the packaging process of customers, there will be problems such as difficulty in moving the machine or poor opening performance after bag making, which seriously affects the use of customers.

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