The relationship between masks and math

A lot of questions were asked about masks, about the area of masks, about the type of masks, about the production of masks, and so on. This is the question I asked about masks. Let's visit, we come to Zhejiang Hengbeikang Medical Equipment Co., Ltd, which specializes in the production of single-use masks, including N95 masks, medical surgical masks, disposable medical masks, civilian protective masks and so on. It also exports to foreign countries. The staff patiently explained all kinds of masks to us, and we listened very carefully and learned a lot about masks. Then they took us to visit their production workshop, the production process basically does not need artificial, fully automatic, machine production, so the output is very high yo. After the visit, they also gave us a lot of masks, really too hospitable. Let's review it! Mask a **** has five parts, the outermost layer is the water-repellent layer of non-woven fabrics mainly adsorb dust odor and harmful particles, blocking droplets, the innermost layer is a skin-friendly layer of non-woven fabrics, to enhance the comfort of the skin, better absorption of moisture, the middle layer is the most core material meltblown filter cloth, mainly polypropylene as the main raw material, the diameter of the fibers can be up to 1 ~ 5 microns, you can effectively filter ≤ 0.3 microns particulate matter. We did the test on the spot, Hengbeikang's ear strap is completely attached to the standard, and finally the nose strip, there are three kinds of full-plastic, single-core and double-core, and the double-core cost is the highest. A finished mask is 175mm long and 95mm wide

The area is 166.25 square centimeters. The weight of the mask is around 3.098g, the factory price is 0.3 yuan and the cost is 0.22 yuan, a price that surprised us because the selling price in the market has doubled nearly 10 times, especially during the epidemic.

Mask production equipment by the discharge mechanism, pleating mechanism

Ear line discharge mechanism, flap mechanism, ultrasonic welding mechanism

Mask cutting mechanism, mask distribution mechanism

Ultrasonic welding ear line mechanism

Mask molding stacking mechanism, control system, etc.

Such a set of a complete set of equipment

The current price is about 100,000 yuan, especially during the epidemic.

The current price is about 100,000 yuan

But during the epidemic, it was as high as more than 400,000 yuan

The masks are sent to the disinfection room

The gas is passed through the ethylene oxide gas for disinfection

Finally, it is necessary to analyze the toxins

Until the surface of the masks of the residual amount of ethylene oxide meets the standard

The masks are sent to the disinfection room

The production of the masks The final step is to analyze the toxins

until the ethylene oxide residue on the surface of the masks meets the standard

And investing in such a large-scale production plant

requires an investment of 3-4 million dollars

yet the costs were recovered in 10 days of production and marketing

Let's just say that the supply exceeds the demand

. have to lament the oversupply of demand

on the market price

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Let's Answer the Questions

This time, the math teacher, Mr. Kim, gave us 20 questions. Let's see how I did! I thought carefully about each question and then started to answer them. After the teacher sent out the answers, I checked them and realized that I got one question wrong. The question is shown in the picture. I thought too much about it. I thought that you don't always get 5 every time you go out, so there are three possibilities.

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Learning Summary

Through these activities, I learned a lot about masks as well as consolidated my math knowledge. It was really meaningful activities that not only enriched my summer vacation life but also taught me what I could not learn from the textbook. I am also quite satisfied with my performance during this research.