High-temperature steaming resistant and quick freezing resistant food packaging material and preparation method thereof

Abstract

The invention belongs to the field of material science, and in particular relates to a high-temperature steaming resistant and quick freezing resistant food packaging material and a preparation method thereof. The packaging material is prepared from the following substances in parts by weight: 10 to 20 parts of homo-polypropylene, 60 to 70 parts of polypropylene randon copolymer, and 10 to 20 parts of high-density polyethylene. The preparation method comprises two steps of stirring for uniform mixing and mixing extrusion. According to the method disclosed by the method, the three materials such as homo-polypropylene, polypropylene randon copolymer and high-density polyethylene are mixed according to a specific ratio, thus obtaining the high-temperature steaming resistant and quick freezing resistant food packaging material which has the characteristics of high-temperature resistance, quick freezing resistance, high oxygen insulation property, high toughness and the like.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a high-temperature cooking and quick-freezing-resistant food packaging material and a preparation method thereof. Background technique [0002] PE and PP plastic products are widely used in food packaging, especially as the pace of people's life continues to accelerate, the fast food industry uses a large number of PE and PP plastic boxes or bags every year to hold food. At present, the deficiencies of PE and PP plastic products used for food storage mainly include the following points: 1) They are not resistant to high temperatures, and cannot heat and disinfect the food in plastic products at high temperatures. It is not suitable to heat food at a temperature above 120°C; 2) It is not resistant to low temperature and quick freezing. PP plastic becomes hard and brittle when it is below 5°C, and is easy to be damaged. Ordinary plastic boxes are easy to harden and crac...

AI Technical Summary

Problems solved by technology

At present, the deficiencies of PE and PP plastic products used for food storage mainly include the following points: 1) They are not resistant to high temperatures, and cannot heat and disinfect the food in plastic products at high temperatures. It is not suitable to heat food at a temperature above 120°C; 2) It is not resistant to low temperature and quick freezing. PP plastic becomes hard and brittle when it is below 5°C, and is easy to be damaged. Ordinary plastic boxes are easy to harden and crack; 3) Poor oxidation resistance, conventional PP or PE plastic boxes have relatively small density and poor oxygen barrier ability, and oxygen in the air is easy to enter, causing oxidative deterioration of the food in the box; 4) Poor toughness , conventional PP plastic boxes have poor toughness and may break when bumped or squeezed

Images