Researchers at Stanford University in the United States have developed a new type of fabric that has better heat dissipation than any current natural or synthetic fabric. They wrote in the "Science" magazine that wearing clothes made of such fabrics in the summer would feel cool and comfortable even in an environment without air conditioning. There are also some fabrics on the market that can effectively evaporate the sweat to reduce the body temperature. The new fabric uses a completely different cooling mechanism: it promotes heat dissipation by reducing infrared radiation barriers. This new type of fabric is somewhat similar to our daily use of kitchen plastic polyethylene. Kitchen plastics have an important property that allows infrared radiation to pass through, but it is impervious to water and transparent and cannot be used to make clothes at all. Stanford University researchers have used nanotechnology, photonics technology, and chemical technology to make up for these deficiencies in polyethylene. They found a polyethylene material commonly used in battery manufacturing that has a special nanostructure that is opaque under visible light but does not block infrared radiation. The researchers then used a harmless chemical to make them water-permeable, allowing water vapor molecules to pass through the nanopores of the material. In this way, the improved new material has three basic conditions as a clothing fabric: opaque in visible light, water permeable and air permeable, allowing heat radiation to pass through. In order to make this lightweight material more like a fabric, the researchers designed a three-layer structure with a certain strength and thickness: two layers of polyethylene separated by a cotton net. The researchers pointed out that all objects, including the human body, radiate heat in the form of infrared radiation. Clothing will limit the discharge of body heat and make the skin feel warmer. Therefore, the clothing with heat-dissipating function is the first choice for clothing in summer. . Compared with the same thickness of cotton cloth, the new fabric has better heat dissipation performance: clothes made of new fabrics will be two degrees Celsius lower than those of cotton cloths. The researchers said that the new research has opened up a new way of studying cooling or heating technology: without using external energy sources, the aim is to change the infrared radiation penetration of the material. To make new fabrics more like clothing fabrics, more work is needed, such as adding more colors and textures. Perhaps in the near future, people can wear cool and cool air-conditioned clothes to spend the summer. The electric tool is a kind of small electric motor or electromagnet as the power. A small tool that drives the working head through a transmission mechanism. There are a wide variety of electric tools, complete functions, easy to carry, and simple to use. They have been widely used in various industries and have entered the family. Electric tools are divided into handheld and movable There are two types. Hand-held power tools are more flexible, convenient and widely used. Many varieties have become necessary tools for production and life. There are many brands of power tools. According to the functions and uses of power tools, they are divided into nine categories. . Mainly are the following nine categories: Electronic Tools,Hand Drill,Electric Hammer,Electric Saw,Angle Grinder Rugao Yaou Import & Export Trade Co., Ltd , https://www.ntyaous.com
1. Metal cutting power tools, metal cutting power tools mainly include: electric drills, magnetic drills, electric reamers, electric knives, electric scissors, electric punching shears, electric reciprocating saws, electric pipe saws, electric tapping machines , Electric profile cutting machine, electric oblique cutting machine, electric weld beveling machine, multifunctional electric tools.
2. Sanding power tools, sanding power tools include; straight grinders, angle grinders, flexible shaft grinders, mold electric grinders, flat sanding machines. Belt sander,. Straight polishing machine, disc polishing machine.
3. Assembly electric tools, assembly electric tools include: electric wrenches, fixed torque electric wrenches, electric screwdrivers, electric expansion planes, electric self-powered screwdrivers, electric pull willow guns.
4. Construction road power tools, construction road power tools including: concrete vibrator, electric hammer, hammer drill, impact drill, electric pick, electric floor polisher, electric stone cutter, willow bolt wrench, wet grinding Light machine, electric steel disc cutter, electric pipe threader, electric pipe bender, electric engineering drill, electric scraper, electric brick wall milling machine
5. Mine power tools, mining power tools include: electric rock drilling face, rock electric drill,
6. Railway power tools, railway power tools include: railway electric wrench, sleeper electric drill, sleeper electric pick
7. Power tools for agriculture and animal husbandry, including: electric scissors machine, electric tea plucking machine, electric wine spraying machine, electric hoof repairing machine, electric food sampling machine.
8. Forestry power tools, forestry power tools include electric band saws, electric planers, electric plugs, woodworking multi-tools, electric pruners, electric pruners, electric slotting machines, electric chain saws, electric curves Saws, electric wood milling, woodworking knife grinders, electric circular saws, electric wood drills.
9. Other types of electric tools. Other types of electric tools include: plastic welding guns. Electric cloth cutting machine, electric air Pump, electric pipe cleaning machine, electric crimping machine, plaster chainsaw, electric engraving machine, electric rust remover, plaster electric shears, electric carpet shears, electric dental drill, electric sternum saw, electric bone drill ,