High-barrier thermophilic digestion resistant easy-stripping membrane

Abstract

The invention provides a high resistance and high temperature braising and cooking tearable membrane. The invention is characterized in that the invention consists of three layers of macromolecule material with good compatibility and close molecule structure, with the external layer is modified polyalkenes, the middle layer is multi-copolymerized polypropylene and the internal layer is terpolymer (ethene-ethylene-propylene butene). The modified polypropylene is metallocene modified polypropylene. The modified polypropylene occupies the proportion of 20% to 25%, the multi-copolymerized polypropylene occupies 50% to 60%, and the ethene-ethylene-propylene butene copolymer occupies 20% to 25%. The invention has extremely good biological inertia innocuity and is suitable for food packages; the invention does not generate the deformation, has wide applicable range, ensures the storages of convenient foods, children food, jelly, soft can, etc. not to be mortified or deteriorated, and reaches the requirement of asepsis (F0 is more than 8); the invention does not generate poisonous matters in the application and recovery process, has no pollution and belongs to environmental protective product.

Description

technical field [0001] The invention relates to a heat-sealing cover film and a packaging film used for packaging various convenience foods, children's food, jelly, soft cans and the like. Background technique [0002] The high-barrier high-temperature resistant cooking easy-tear film is mainly used for packaging films such as convenience food, children's food, jelly, soft cans, etc. After the film is extruded, it is printed and cut according to the requirements of various food factories. Make heat-sealing lidding film and packaging film terminal products such as convenience food, children's food, jelly, soft cans, etc., and send them to users after packaging. At present, most of the jelly cover films, instant food cover films and soft can packaging films used by domestic convenience food, children's food, jelly, soft cans and other enterprises are composite films such as ordinary polypropylene, polyethylene, polyester, nylon and polyethylene. There are many defects in thes...

AI Technical Summary

Problems solved by technology

First of all, only low-temperature distillation (70-90°C for 30 minutes) pasteurization method can be used. The sterilization method at this temperature can only kill all pathogenic bacteria, but cannot kill mold, yeast and other bacteria. Temperature will cause deformation of the soft bag or cover film, so in order to prevent the decay and deterioration of convenience food, children's food, jelly, soft cans, etc., the manufacturers have added food preservatives to the food. Preservatives are harmful to human health (especially children's body) Health) have a certain degree of harm, for this reason, the State Food and Drug Administration proposed to cancel the preservative requirements, in order to achieve the purpose of complete sterilization and long-term preservation, it is necessary to adopt the sterilization technology requirements of 121-135 ° C for 30 minutes

Neither the jelly lid film nor the soft can packaging film currently used in my country can meet the technical requirements for sterilization at 121-135°C for 30 minutes

Even if there are a few packaging films that can reach 121-135°C for 30 minutes, most of them are made of nylon or polyester and polyethylene or polypropylene, which is expensive and difficult for established companies to accept. In addition, this composite material Because polar and non-polar polymer materials are combined by physical methods, they cannot be recycled and reused after being discarded, and they do not have high barrier resistance.

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