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[Pneumonia mask] Expert research kitchen paper homemade masks comparable to surgical masks (with teaching)

2020-02-14T03:44:46.482Z


The outbreak of new coronavirus pneumonia (Wuhan pneumonia) continues to spread, but the supply of masks in the market is tight. The Hong Kong University Shenzhen Hospital, Consumer Council and Science Park and other established working groups have tested the function of surgical masks after cleaning and disinfection in the past week, and also analyzed the safety and function of DIY homemade masks. They found transparent plastic sleeves for stationery 3, kitchen paper and bags or boxes of three or four layers of tissue paper, in line with the standards of safety, low cost, breathable and comfortable, easy to make, easy to find materials, suitable as a material for homemade masks, allowing citizens to face the lack of supply of masks, can Provide one more option.


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Written by: Hu Jiaxin

2020-02-14 11:39

Last updated: 2020-02-14 11:39

The outbreak of new coronavirus pneumonia (Wuhan pneumonia) continues to spread, but the supply of masks in the market is tight. The Hong Kong University Shenzhen Hospital, Consumer Council and Science Park and other established working groups have tested the function of surgical masks after cleaning and disinfection in the past week, and also analyzed the safety and function of DIY homemade masks. They found transparent plastic sleeves for stationery 3, kitchen paper and bags or boxes of three or four layers of tissue paper, in line with the standards of safety, low cost, breathable and comfortable, easy to make, easy to find materials, suitable as a material for homemade masks, allowing citizens to face the lack of supply of masks, can Provide one more option.

▼ Expert homemade mask detailed teaching ▼

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HKU Shenzhen Medical College, Consumer Council, Hong Kong Applied Science and Technology Research Institute, Hong Kong Science and Technology Parks Corporation and CityU Department of Architecture and Civil Engineering have set up a working group. For more than a week, reference to the triple design function of surgical masks: waterproof outer layer , Middle layer filtration, inner layer water absorption, evaluation of different mask materials, including scanning the fiber structure under the electron microscope, checking the aerosol particulate filtering function and fluorescent cough test.

Self-made mask materials must meet five major requirements, including safety, low cost, breathable and comfortable, simple production and easy to find materials. The working group pointed out that experimental tests found that transparent plastic covers for stationery, kitchen paper, and three or four layers of tissue paper in bags or boxes meet the above requirements and can be used as the top, middle and inner layers of homemade masks, respectively.

Studies have shown that transparent plastic covers for stationery can effectively block a large number of droplets in a fluorescent cough test. The cost is only two yuan and can be used multiple times after cleaning, similar to the waterproof function of surgical masks.

As for kitchen paper, it generally meets the specifications of food hygiene standards. When examined under a scanning electron microscope, its fiber size, voids and arrangement are similar to surgical mask materials. While the texture of the face towel is soft, hygienic standards and strong water absorption, it is most suitable as an inner layer material.

The working group suggested that the public can consider the above materials and designs as protection in the absence of surgical masks and self-made masks. The cost of making disposable masks is only two or three yuan.

In addition, the group pointed out that if the public cleans and disinfects masks by themselves with water, alcohol, detergent, etc., the outer waterproof layer will be damaged, the waterproof function will be invalidated, and the middle layer fiber material will also be damaged, deformed, shrunk, or the integrity will be damaged It affects the filtering efficiency and loses the protective effect. It is recommended not to reuse surgical masks.

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Source: hk1

All news articles on 2020-02-14

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