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Characteristics and classification of non-woven fabrics for masks Today, I will introduce to you the classification of commonly used masks in the market and the composition of non-woven fabrics in masks. First of all, there are two types of masks commonly used in the market, namely flat masks and three-dimensional masks. General flat masks usually consist of three layers, they are spunbond nonwoven fabric - meltblown nonwoven fabric - spunbond nonwoven fabric. What can really play the filtering effect is the melt-blown non-woven fabric in the middle layer, so the melt-blown non-woven fabric in the middle layer will directly lead to the filtering effect of the mask. Better 3d masks usually consist of five layers, spunbond nonwoven - meltblown nonwoven - filter cotton - meltblown nonwoven - spunbond nonwoven. The two layers of melt-blown non-woven fabric in the middle can make the three-dimensional mask have a strong filtering effect and can prevent PM2.5. However, compared with flat ma

Working Principle of Ultrasonic Flow Meter The strap-on ultrasonic flowmeters supplied by Kaidi are based on the working principle of the time difference method. Ultrasonic Flow Meter adopts the measurement principle of the time difference method. It uses the ultrasonic wave emitted by the sensor to propagate in the flowing fluid. The sound wave propagation speed in the downstream direction will increase, and the backward direction will decrease. In the same propagation distance, there will be different transmission times. According to the difference between the transmission time and the measured The relationship between fluid velocity measures the fluid velocity. The flow rate of the fluid is different in different positions in the tube. The flow rate in the center of the tube is faster than the flow rate near the wall of the tube. The flow velocity distribution of the fluid in the pipeline can be represented by the flow velocity cross-sectional distribution diagram. By setting the f

The efficient operation of process plants relies on accurate and reliable level measurement instruments . These measurements are important for optimizing process control, inventory management, and custody transfer, all of which can affect profitability. Level measurement also plays a critical role in safety applications such as overfill prevention. Radar level meter systems are available in contacting and non-contacting versions. Contacting: Contacting is generally a good fit for small spaces and is an easy replacement of older technology such as displacers and capacitance probes. Contacting devices, called guided-wave radar (GWR), are slightly more prevalent primarily because they are capable of providing interface level instrument (e.g. oil and water), as well as standard direct level measurements. Guided wave radar measurement is based on the time difference between sending and receiving a microwave pulse sent down a probe and reflected back to the media surface. For level and inter

A slew of factors go into picking a diaper that will work for your infant. Will it cause a rash? Does it absorb enough liquid? Does it fit? As a parent, you will consider all these questions before putting any old diapers on your child.   Parents are bombarded with countless options—both in-store and online—leaving many to settle between the convenience of disposable diapers and the eco-friendly, organic nature of cloth diapers. Fortunately, there is an option that combines both!  Here are four great reasons to choose disposable bamboo diapers : Bamboo diapers absorb more liquid than cotton fabric A diapers main purpose is to store your little bundle of joy's fluids inside, and keep it there until changing time. Compared to cotton fabric, bamboo organic diapers absorb and retain nearly twice as much liquid. They will keep your baby's buttocks and surrounding area tidy and your child dry and happy for longer.  Bamboo diapers have natural antibacterial, hypoallergenic and bacter

The first written definition of nonwovens came from the American Society for Testing and Materials in 1962, which defined nonwovens as "textiles made of cotton or fiber webs bonded together by adhesives." Currently, the nonwovens industry association INDA defines nonwovens as "sheet-like or net-like structures in which fibers or filaments (and perforated films) are intertwined by mechanical, thermal or chemical means. These substrates are flat, Perforated sheets made directly from individual fibers or from molten plastic or plastic films, they are not made by weaving or weaving and do not require the conversion of fibers into yarns.   non-woven fabric   The technical definition expresses the basic basis of the nonwovens process, but a general description of nonwovens is insufficient due to the diversity of production technologies. Just like woven or knitted fabrics, each process has its own unique characteristics. Aside from being classified as a nonwoven, the resulting

Air source heat pump water heater or heating heat pump is a kind of energy saving and environmental protection hot water supply device that can replace boiler without resource limitation, also for heat pump heating system. It uses green, pollution-free cold coal to absorb heat from the air and work through a compressor to produce domestic hot water of more than 50 degrees. The annual C.O.P value is greater than 3.0.  Industrial heat pump manufacturers 's air source heat pump water heater or heating heat pump is suitable for indoor swimming pool, hotel, villa, hair salon, bath foot therapy, factories, schools and farms and other places that need hot water centralized heating which is called heat pump heating system. Air source heat pump water heater or heating heat pump has four main characteristics, also suitable for heat pump heating system:   Safe Since the heat pump water heater does not use the heating element to heat directly, there is no leakage safety hazard compared with t

Textile elastic fibers can give the human body a good sense of contact, and play an irreplaceable role in the wearing comfort and shape retention of clothing. Therefore, they occupy a stable position in textile fibers. Certain elasticity of textile fabrics made by textile testing equipment has become an inevitable development trend of clothing textiles.There are 5 types of textile elastic fibers:   1. Polyurethane fiber (spandex)   Polyurethane textile elastic fiber refers to a fiber made of a block copolymer with polyurethane as the main component. Its elasticity comes from its molecular structure consisting of so-called "soft" and "hard" segments of the block copolymer network structure. Spandex spinning methods include dry spinning, wet spinning, chemical reaction spinning and melt spinning. Dry spinning technology is currently the most common method of spandex industrial production. Spandex is an earlier developed and most widely used variety of textile elastic

The first written definition of nonwovens came from the American Society for Testing and Materials in 1962, which defined nonwovens as "textiles made of cotton or fiber webs bonded together by adhesives." Currently, the nonwovens industry association INDA defines nonwovens as "sheet-like or net-like structures in which fibers or filaments are intertwined by mechanical, thermal or chemical means. These substrates are flat, Perforated sheets made directly from individual fibers or from molten plastic or plastic films, they are not made by weaving or weaving and do not require the conversion of fibers into yarns.     non-woven fabric   The technical definition expresses the basic basis of the nonwovens process, but a general description of nonwovens is insufficient due to the diversity of production technologies. Just like woven or knitted fabrics, each process has its own unique characteristics. Aside from being classified as a nonwoven, the resulting fabric doesn't ha

Agriculture non woven fabric is a new type of agricultural environmental protection material, which is a blessing to farmers. In recent years, non-woven bagging has become more and more widely used in fruit cultivation. Among them, banana bagging in the Philippines, Central America and grape bagging in Xinjiang are particularly common.   Agriculture non woven fabric packaging bags are usually white or white and blue. The non-woven fabric is environmentally friendly and degradable, and has the characteristics of good waterproof, breathable, bird-proof, insect-proof, antibacterial, light transmission and environmental protection. According to the water vapor molecular diameter of 0.0004 microns, when the diameter of rain is the smallest, the diameter of fine mist is 20 microns, and the diameter of drizzle is as high as 400 microns. So it is waterproof and breathable. Since rainwater cannot corrode, it can greatly reduce the extent of disease.   What are the benefits of agriculture non w

ZF Fabric upholstery fabric manufacturers , formerly known as Hangzhou Fengnian Textile Co.,Ltd, was founded in 1994 and renamed as a new upholstery company in 2008 named Hangzhou Zhou Feng Textile Co.,Ltd. We are a professional fabric manufacturer for years, which is located in the famous textile industry developed city, Hangzhou city, Zhejiang province. We mainly produce and export chenille fabric, polyester yarn-dyed fabric, cotton and linen fabric, printed fabric, flocking fabric, flannelette and so on. Our fabrics can be used for all kinds of furnitures,home textiles,hotel upholstery and so on.As a quality supplier, we have the following advantages: 1) 25 years of experience in product design and development team, can solve any problem for you。 2) 500,000 meters of monthly production capacity to ensure the timeliness of supply. 3) 2 groups of quality inspection team, to ensure the quality of goods after sale without worry 4 Experienced sales team to solve any problems in delivery.

Quanzhou Rowoo Shoes Co.,Ltd located in Quanzhou city,Fujian province China, is specialized in all kinds of wholesale flip flops , Beach Slippers, Sport sandals and shoes for 18 years, Our Products had exported to several countries and regions.  Here we introduce the difference between flip-flops and sandals Sandals are a kind of toe-exposed shoes. They are mainly worn barefoot, and the ventilation is cool like slippers. However, the sandals are thicker than the bottom of the slippers and have a shoe last and more materials. Sandals can be divided into many types: flat heels, wedges, high heels, etc. Traditionally, sandals, like slippers, are used for solemn occasions, running, driving, and improperly wearing sandals. However, walking in the summer to the beach, amateur leisure life is the most suitable for wearing sandals. Because of its extremely simple construction, sandals are the earliest items in human history that evolved from primitive wraps. Sandals have appeared in ancient ci

Heat pumps are receiving increasing attention as environmentally friendly and efficient systems for providing heat, especially given climate change, decarbonization drives and rising energy prices. The wide range of governmental subsidies even reinforces this development. In industrial applications, unused waste heat from production processes can often be used as a heat source and raised to the required temperature level by means of a heat pump – in addition to dispensing with fossil fuels, there is a considerable potential for saving energy costs. But the areas of application are much wider - industrial heat pumps can also be an attractive alternative to conventional systems for providing heat in district heating networks, for supplying neighbourhoods (local heating networks) or for direct heating of buildings. In addition to cooling water from adjacent processes, outside air, geothermal energy as well as groundwater, surface water or wastewater can also be used as heat sources. By us

Laguiole is not a trademark, as too old. It is part of the public domain, that is why anybody can make knives with Laguiole brand. The genuine Laguiole knife is manufactured through 170 operations manual made by expert craftsmen. Our company respects this manufacturing tradition. The name of our brand is "Yuxing Laguiole" - always engraved on the blade of our knives. There are several Laguiole manufacturers that use the same process and produce high quality tools, and Yuxing company is one of them.   However, there are a lot of fake laguiole knives that are made from molds in China and even in France. Don't forget, laguiole knives/ laguiole kitchen knives are handmade from very high quality raw materials, which is why you won't find a laguiole knife at a low price.  A genuine Laguiole knife must include :   Handle with high quality raw material (real horn, wood...) The assembly is done by hand and everything is mounted as a puzzle, assembled nested. Fake knives are g

Of all the changes you and your baby will go through in the first year of their life, changing diapers must be the least exciting. You change dirty, wet diapers 12 times a day, and the right diaper can make the mess easier to deal with.   So whether you're looking for the best cloth diapers, the small pack of diapers , or the best overnight diapers, we've got you covered with Eco Boom's picks for the best diapers to stock up on. And by stock up, we mean really, really stock up. Because you're definitely going to use way more diapers than you ever thought possible. What are Baby Diapers Made of? Different brands of disposable baby diaper is made very similarly, with a few minor tweaks in design, mainly for function and comfort. Generally, the diaper core is made of polymer and cellulose, which are responsible for absorbing fluids so your baby will feel dry for longer.   The diaper casing holds everything together. Shell design is important and affects fit and comfort.  

The dazzling pearl necklace hangs around the neck, which can emit a dazzling light and make the whole person look more spiritual and temperamental, so more people are willing to wear pearl necklaces. Judging from the current market situation, there are many people who buy pearl necklaces. Then, how to choose the following pearl necklace franchisees who are suitable for their own pearl necklaces will be introduced. 1. Determine the size of the pearl necklace according to age and identity At present, pearl necklace franchisees with reputation have found that the sizes of pearl necklaces are different, and pearl necklaces of different sizes are suitable for different groups. Therefore, pearl necklace franchisees believe that the older the person, the more should choose a larger pearl necklace, and the more senior the lady should choose the larger pearl necklace, in order to match their age and temperament. 2. Determine the length of the Pearl Pendant Necklace according to the face and

Jewelry wholesale business is very competitive, here are 6 criteria for finding a business partner in the jewelry market. As of now, many new companies are competing in the market with an eye toward offering customers something special. If you are a new player in jewelry wholesale business, you can try jewelry wholesale business first Whether you are a new company or an established company; have your own specific designs, or wish to have new designs, or wish to buy wholesale; to reach new markets, you really need good "business partners". These are people you can trust with the highest level of transparency when working together. The focus is on the type of partner you are looking for. How to Find a Partner in Your Jewelry Business Here's the sixth point to consider when you're looking to find a business partner. 1. Trust and Transparency Jewelry business trust and transparency, this is the first point you need to keep in mind. Great reputation in the jewelry industr

With the improvement of today's living standards, bus have gradually become a inportant traffic tools in our daily life. The bus passenger seats are important tool to provide the driver and occupants with ease of operation, comfort and safety, and less fatigue. While enjoying the comfort and convenience that car seats bring to us, do we know anything about the manufacturing process? Bus passenger seats are an important part of car interiors. The production of bus seats is professional and complex. At present, professional chemical factories have formed in the industry to complete the production of seats, in order to provide special products for the whole vehicle. Below I use the form of text to express the steps of the overall process of the bus passenger seats in bus seat manufacturer: The skeleton assembly process:    Skeleton structure stamping → skeleton welding → skeleton painting → skeleton assembly   Sponge foam process: foaming agent pouring → heating → thermalization → s

Giving your baby the best head start possible in life when it comes to health is incredibly important. Every day we put new diapers on our babies unaware of what harmful chemicals we could be exposing them to. Will this affect them later on in life? Well, discovering alternatives to conventional diapers is the first step to avoiding this issue, which is why you should find out if bamboo diapers are safe for your baby. So, are bamboo diapers safe for your baby? Bamboo diapers are safe for your baby because bamboo is one of the most eco-friendly plants in the world that doesn't require harmful chemicals to be added, such as polypropylene, phthalates, chlorine, polyethylene, or dye. Bamboo is 100% biodegradable, antibacterial, and antifungal. We put diapers on our babies every single day, which is good enough reason to think about how safe some of these products really are. Unfortunately, this isn't always clear when purchasing products nowadays, so it's up to us to find out w

SMS non-woven fabric is a composite non-woven fabric , which is made by spunbond and meltblown technology. It has the advantages of high strength, good filtering performance, non-stick and non-toxic. At present, it is mainly used in medical and sanitary labor protection products, such as surgical gowns, surgical caps, protective clothing, hand-washing gowns, handbags, etc. It is non-toxic, tasteless and can effectively separate bacteria. Through special treatment of the equipment, it can achieve the performance of anti-static, anti-alcohol, anti-plasma, water repellent and water production. Features of non-woven fabric: Durability, one-time use. Insulating and non-conductive. Softness and stiffness. Density and expansion. Isotropic, anisotropic. Filterability, breathability and impermeability. Flexible and rigid. Light, loose and warm. It is as thin as a cicada wing and as thick as felt. Waterproof and breathable. Ironing, sewing and shaping. Flame retardant and antistatic. Permeable,