Virus-killing waterproof breathable film and preparation method thereof

Abstract

The invention relates to a virus-killing waterproof breathable film and a preparation method thereof. The virus-killing waterproof breathable film comprises the following components in parts by weight: 70-85 parts of a polytetrafluoroethylene master batch, 2-9 parts of a nano filler, 4-7 parts of a plasticizer, 15-22 parts of modifier, 0.5-1.5 parts of a heat stabilizer, 10-12 parts of a coalescing agent, 1-2 parts of a pore-forming agent and 5-14 parts of nano silver-copper alloy particles. The particle size of the nano-silver copper alloy particles ranges from 15 nm to 50 nm, and copper metal atoms on the outer surfaces of the nano-silver copper alloy particles form copper oxide. According to the waterproof breathable film, specific nano-silver copper alloy powder particles are added into a tetrafluoroethylene base material to serve as a sterilizing and virus killing agent; compared with the existing natural antibacterial agent, organic antibacterial agent and inorganic antibacterialagent, the antibacterial effect is better; and according to the invention, super bacteria and viruses can be resisted and killed, and the killing effect on escherichia coli and staphylococcus aureusrepresenting conventional strains, methicillin-resistant staphylococcus aureus representing super bacteria and currently known coronaviruses reaches 90% or above.

Description

technical field [0001] The invention relates to the field of waterproof and breathable membranes, in particular to a virus-killing waterproof and breathable membrane and a preparation method thereof. Background technique [0002] Waterproof and breathable membrane (breathing paper) is a new type of polymer waterproof material. Its working principle is that in the state of water vapor, the water particles are very small. According to the principle of capillary movement, it can smoothly penetrate into the capillary to the other side, thus Vaporization occurs. When the water vapor condenses into water droplets, the particles become larger. Due to the surface tension of the water droplets (the water molecules "pull and compete" with each other), the water molecules cannot smoothly break away from the water droplets and penetrate to the other side, which prevents The penetration of water occurs, so that the vapor permeable membrane has the function of waterproofing. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] At present, in order to improve the waterproof and breathability of medical masks or protective clothing, some manufacturers of medical supplies will add a layer of waterproof and breathable membrane to their filter layer, but the bactericidal effect of the medical masks or protective clothing produced in this way is not ideal. Many manufacturers Try to add various antibacterial materials to the filter layer of masks and protective clothing, hoping to improve the sterilization effect, but due to the performance limitations of antibacterial materials, the current "antibacterial" masks and protective clothing can only do Bacteriostasis, unable to kill superbugs and viruses

Therefore, in order to improve the barrier and filtration efficiency of viruses, the existing medical masks and protective clothing use multi-layer non-woven fabrics, which makes the air permeability of the masks or protective clothing insufficient, and it is more difficult to achieve both sterilization and good air permeability.

For countless medical staff, it will undoubtedly increase the burden of breathing and the pressure of work in a highly stressful and long-term heavy working environment

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