High-strength lightweight antibacterial plastic film and preparation method thereof

Abstract

The invention relates to a high-strength lightweight antibacterial plastic film and a preparation method thereof. The antibacterial plastic film is prepared by co-extrusion blow molding of an upper surface layer, a middle layer and a lower surface layer, the upper surface layer and the lower surface layer are prepared from the following components in parts by weight: 15-20 parts of metallocene polyethylene, 80 parts of low-density polyethylene, 5-10 parts of nano calcium carbonate, 2 parts of fluorine-containing polymer PPA, 0.15-0.6 part of talcum powder, 0.1-0.4 part of erucyl amide and 2-4 parts of antibacterial master batch; the middle layer is prepared from the following components in parts by weight: 90 to 95 parts of low-density polyethylene, 5 to 10 parts of nano calcium carbonate, 2 parts of fluorine-containing polymer PPA, 0.15 to 0.6 part of talcum powder, 0.1 to 0.4 part of erucyl amide, 15 to 20 parts of barrier master batch, 15 to 20 parts of organic modified montmorillonite and 3 to 6 parts of maleic anhydride grafted polyethylene. The high-strength and light-weight polyethylene film prepared by the preparation method disclosed by the invention has high-barrier and antibacterial functions at the same time.

Description

technical field [0001] The invention relates to a high-strength and light-weight antibacterial plastic film and a preparation method thereof. Background technique [0002] Polyethylene (PE) is one of the most widely used materials in film blowing and casting processes at this stage. It is easy to process and the film produced has high strength and flexibility. It is widely used in packaging, hygiene products, and agriculture. and many other fields. For example, Chinese patent application number: 201711248646.1 discloses a PE liquid packaging film and its preparation method. The PE liquid packaging film is prepared from the following raw materials in parts by weight: 35-45 parts of LLDPE, 95-105 parts of LDPE, carbonic acid 1-5 parts of calcium, 1-3 parts of 2,6-di-tert-butyl-4-methylphenol, 2-4 parts of EVA, 0.2-2 parts of stabilizer, 0.1-1 part of inorganic antibacterial agent. Through reasonable proportioning, a suitable stabilizer and inorganic antibacterial agent are o...

AI Technical Summary

Problems solved by technology

However, limited by the performance of ordinary polyethylene materials, if the purpose of light weight is only achieved by reducing the thickness, it may lead to a decrease in its packaging performance and cause product quality problems

(3) The existing polyethylene film has poor antibacterial performance, which limits its scope of use, and is difficult to circulate in the market as a food packaging film that is not easy to breed bacteria

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