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[New Crown Pneumonia] Hong Kong homemade mask filter? CityU Professor: Already contacted by me

2020-03-14T03:19:26.953Z

The key filter fabric for masks-Meltblown Nonwoven is in short supply worldwide. Professor Hu Jinlian of CityU accepted an interview with "Hong Kong 01" earlier, saying that his laboratory in Hong Kong can make samples of meltblown nonwovens, and said that Hong Kong has conditions. The cloth is produced. She was interviewed again today, saying that at least 3 companies have contacted her to understand after the interview was published. She added that the "meltblown nonwoven" machine had a flat surface of about HK $ 5 million and an additional 2,000-foot dust-free plant. It is expected to be put into production as soon as six months, with a maximum of about 900,000 mask filters in 24 hours. Some local mask manufacturers have stated that the purchase of face mask filters has encountered export restrictions, price increases and even coaxing. If local filters are produced, the quality and production of masks will be ensured. Member of the Legislative Councillor Guo Jiaqi said that the Health Promotion Bureau can study related topics and consider that public funding is most important to consider factors such as efficiency.



01 Investigation

Written by: Chen Runnan

2020-03-14 11:08

Last updated: 2020-03-14 11:08

The key filter fabric for masks-Meltblown Nonwoven is in short supply worldwide. Professor Hu Jinlian of CityU accepted an interview with "Hong Kong 01" earlier, saying that his laboratory in Hong Kong can make samples of meltblown nonwovens, and said that Hong Kong has conditions The cloth is produced.

She was interviewed again today, saying that at least 3 companies have contacted her to understand after the interview was published. She added that the "meltblown nonwoven" machine had a flat surface of about HK $ 5 million and an additional 2,000-foot dust-free plant. It is expected to be put into production as soon as six months, with a maximum of about 900,000 mask filters in 24 hours.

Some local mask manufacturers have stated that the purchase of face mask filters has encountered export restrictions, price increases and even coaxing. If local filters are produced, the quality and production of masks will be ensured. Member of the Legislative Councillor Guo Jiaqi said that the Health Promotion Bureau can study related topics and consider that public funding is most important to consider factors such as efficiency.

Professor Hu Jinlian, Department of Biomedical Engineering, City University, said that meltblown nonwovens are made by melting polypropylene chips (Polymer Chips), then spraying liquefied polypropylene into ultra-fine filaments with air, and finally rolling into a cloth. The whole process is like rolling cotton candy. Polypropylene, a raw material, is a by-product of petroleum. It is a widely used plastic and is widely used. It can be purchased from Sinopec with little difficulty. The key to meltblown nonwovens is meltblown technology. (For details, please refer to another article)

Professor Hu Jinlian explained to reporters that the key features of meltblown nonwovens in masks. (Photo by Li Zetong)

Meltblown machines are about 5 million yuan flat and shipped to assembly in three months

Professor Hu said that the mainland manufactures and produces meltblown non-woven machines with a flat surface of about 5 million Hong Kong dollars and can be shipped to assembly in three months. The higher-quality machines are made in Germany and sell for about 10 million yuan. It takes about six months to ship and assemble. The machine can be operated by 3 workers. It can produce a maximum of about 1.5 tons of meltblown nonwoven fabric in 24 hours. In theory, it can supply about 900,000 masks. The actual production volume is expected to be low. Workers have to be trained and they can be imported from the Mainland in the beginning. Production can begin as soon as about 6 months.

The machine covers an area of ​​more than 1,000 feet, so it needs a factory building of about 2,000 square feet and a height of about 4, 5 meters. It must be a dust-free workshop like a mask factory. In addition, the power supply requirement is high, at least 450 kilowatts. . It is understood that there is no shortage of factories in Hong Kong at present, and the rent is about 10 yuan per square foot. In addition, the construction cost of a 1500-square-foot mask factory dust-free workshop is about 1 million yuan, but the bottom of the building is only 2 meters high.

Workers produce filter nonwovens in meltblown nonwovens workshops. (Xinhua News Agency)

Hu Jinlian: Can help post-epidemic transformation

Professor Hu said that if her own laboratory was funded, she could produce samples of meltblown nonwovens and research transitional products after the epidemic. She said that because of the excellent filtering performance and potential of meltblown nonwovens, it can be used at least for home air filtration. In addition, meltblown technology from companies in Europe, America, and Japan can already produce meltblown non-woven fabrics with nanometer-level juveniles. It is used in medical innovation industries, such as kidney dialysis machines, and the latest research is more used for cell tissue cultivation.

Bian Yanxun (right) said that the mask needs of chronically ill patients are often neglected, so they hope to donate masks to them. (Photo by Liang Pengwei)

"Good land cover" Yan Yanxun: Purchasing filter element is looking forward to local production

One of the founders of "Good Land Mask", Yan Yanxun, said that when preparing for the production of masks, his company encountered many difficulties in purchasing meltblown non-woven fabrics, so he very much looked forward to Hong Kong mask filters. It is said that most of the meltblown nonwovens are produced in the Mainland, but the mainland currently restricts the export of meltblown nonwovens, including Hong Kong, which has not been able to import them.

He said that they were collecting in foreign countries, but the meltblown non-woven global scramble now, "as soon as a large company orders it, (we) want to order it." Another price increase has been encountered, and the price has doubled in the short term. Moreover, it is difficult to confirm whether the other party's materials are qualified, and it is easy to encounter fraud. Even if the order is successfully placed, it will not be available until 8 months, and the situation is very serious. He said that if Hong Kong produces meltblown non-woven fabrics, at least the quantity and quality of mask production can be ensured, which will guarantee the production of local masks.

On February 6, the workers of Hainan Chengmai Xinlong Holding Co., Ltd. cut the produced filter nonwovens in a meltblown nonwovens workshop. (Xinhua News Agency)

When the masks ran out, the price of a mask rose from a few mules to a few yuan, or even more than ten yuan. (Photo / Photo by Ou Jiale)

Guo Jiaqi: Funding needs to study cost-effectiveness

Legislative Council Member and Doctor Guo Jiaqi said that the government had previously applied to the Finance Committee of the Legislative Council for funding for the "Epidemic and Epidemic Prevention Fund", of which 1.5 billion was used to support local mask production. If the upstream of the production of masks, that is, meltblown non-woven fabrics, is to be subsidized, the funding of the Legislative Council will be required. He believes that with the development of the epidemic, many industries will promote development, but because of funding public funds for specific industries, it is necessary to study whether the cost-effectiveness is reasonable.

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Source: hk1

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