PTFE nano film mask can be washed and reused for 30 days
The emergence of the novel coronavirus has disrupted the medical-grade protection market. It is the Chinese New Year of 2020. How can the protection industry really release production capacity in a special period, and how to deploy to make up for the huge market gap has become the keen concern of the whole country. For ordinary citizens who are about to resume work, the most in short supply must be masks. It is reported that the masks that can play a role in virus protection mainly include medical surgical masks and N95 masks. The main material that brings virus filtration to these two masks is the inner filter cloth made of polypropylene which is extremely fine and electrostatically charged to capture dust.——Meltblown nonwoven. However, electrostatic adsorption masks have a huge weakness. The electrostatic content will gradually decrease with the production, packaging, delivery, transportation, and use, and the protective efficiency will decrease. To this end, the Chinese Society of Composite Materials proposed a new direction for the development of epidemic protection——PTFE nanofilm mask. Nano antibacterial masks are similar to ordinary medical masks, and also include outer layer, middle layer, inner layer, ear loops, nose clips, etc. The special feature is that the middle layer is composed of nano-membrane with smaller pore size (100-200 nanometers). , generally PTFE material. The PTFE film prepared by the unidirectional or biaxial stretching method has a spider web-like microporous structure on the surface, and has very complex changes in the three-dimensional structure, such as network connection, hole inlay, and pore bending, so it has excellent surface filtration. Function. Nano masks produced by using this material have the characteristics of high barrier efficiency, long service life, light and breathable, and are a new direction for the development of masks in the future. However, at present, PTFE nano-film masks cannot completely replace traditional masks due to price factors.
1. ISO 5402-1: Specifies the flexometer method for testing leather flex resistance under repeated bending.
2. ISO 17694: Defines test methods for footwear upper and lining flex resistance, simulating real-world bending stress to assess long-term durability.
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