Food-grade polypropylene material and preparation method thereof

Abstract

The invention discloses a food-grade polypropylene material and a preparation method thereof. The food-grade polypropylene material is prepared from the following components in parts by weight: 98.6 to 99.2 parts of transparent polypropylene resin, 0.4 to 0.6 part of an antibacterial agent, 0.2 to 0.4 part of an antioxidant and 0.2 to 0.4 part of a lubricant, wherein the antibacterial agent is a silver-zinc composite antibacterial agent taking glass as a carrier. The food-grade polypropylene material can improve appearance degradation (yellowing) caused by a pure silver ion antibacterial agent, the refraction coefficient of the antibacterial agent used in the invention is equivalent to that of transparent PP, and the transparency of the transparent PP is not influenced basically.

Description

technical field [0001] The invention belongs to the field of polymer material modification, and in particular relates to a food-grade polypropylene material and a preparation method thereof. Background technique [0002] Antibacterial agents refer to chemical substances that can keep the growth and reproduction of some microorganisms (bacteria, fungi, algae, viruses, etc.) below the necessary level within a certain period of time. Antibacterial agents are divided into three types: organic, inorganic and natural. Natural antibacterial agents The heat resistance is relatively poor and the antibacterial efficiency is low, so it is rarely used; the main uses on the market are inorganic antibacterial agents and organic antibacterial agents. Organic antibacterial agents contain elements such as chlorine and bromine, which are more irritating to the skin and are heat resistant. Poor resistance (about 200°C), generally not used in food contact occasions; inorganic antibacterial agen...

AI Technical Summary

Problems solved by technology

[0003] Polypropylene is light and cheap, and has been widely used in daily necessities, such as kitchen utensils, refrigerator parts, food packaging bags, etc. These parts are generally used as food containers, and food residues during use are easy to act as microorganisms. Energy supplier, easy to cause the growth of bacteria and mold, and then cause food contamination

With the improvement of living standards, people pay more and more attention to health. More and more kitchen supplies and daily necessities in contact with the human body have put forward the requirement of adding antibacterial function. The use in these fields generally requires the parts to be transparent. However, the antibacterial agents that meet food contact are generally inorganic antibacterial agents. The addition of inorganic substances will destroy the crystalline state of polypropylene, affect the light transmittance, and cause the parts to fog; Discoloration reactions are prone to occur under certain conditions, resulting in unsightly parts

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