As we all know, the footwear industry is a traditional industry, but it is definitely not a sunset industry. In China,the well-known brands include Li Ning, Anta, Peak, Xtep, 361°, Erke, Jordan and so on. Li Ning and Anta’s popularity and reputation have dominated the Chinese market with absolute advantage, followed by
Glass products are widely used in practical applications. As a big country in glass production and consumption, China’s glass products are relatively stable in technology and quality control, and glassware quality inspection is mature, but in other words, the products are not always perfect, such as glass products often with common defects such as bubbles, scratches, wavy lines, furuncles, inclusions, missing edges and broken edges,etc.
Among them, bubbles are common defects in glass products and are strictly controlled in
At present, there are many types of masks on the market, mainly divided into medical masks (medical protective masks, medical surgical masks, ordinary medical masks), cotton masks, gauze masks, sponge masks, dust masks, activated carbon masks, paper masks, etc.
When COVID-19 erupted, masks were out of stock again. Do you really understand the masks? What types of masks are there? What are the differences between them?
Medical mask is a kind of textile for medical protection, which
Meltblown cloth is a melt-blown nonwoven cloth formed by drawing the polymer melt trickle extruded from the die spinneret orifice with high-speed hot air flow, thereby forming superfine fibers and collecting the superfine fibers on a screen or roller, and simultaneously bonding the superfine fibers by itself. These superfine fibers with unique capillary structure increase the number and surface area of fibers per unit area, thus making meltblown cloth have good filterability, shielding, thermal insulation and oil absorption. It can be used in
The N95 mask can filter most influenza viruses, dust, pollen, smog and smoke from automobile exhaust, because the filtering efficiency of N95 mask must reach at least 95%. N represents not resistant to oil,i.e. not oil-proof, and 95 represents the filtration efficiency level when 0.3 micron particles are tested.
During the mask inspection in the laboratory, the N95 mask will be cut open，we can see that its internal structure is
