Good sleep is not just a dream, so the ultimate idea of ​​a comfortable sleep is to enjoy life. " Fuji " mattresses specialize in human health sleep research. Its products are derived from European design concepts, and bedding design is based on ergonomics and strives to create an ideal sleeping environment.
A good mattress should have at least two standards: First, regardless of the type of sleeping position, the spine can maintain a straight stretch; second, the pressure is equal, and people lying on the body can fully relax. Europe's industrialization and technical level will be much higher, the economy is more developed, and people have higher requirements on the quality of mattresses. The "Fuji" mattress adopts European mattress production technology, and combines Chinese human body characteristics to create a sleep habit of Chinese people. Quality mattress.
Today's mattresses are basically made of springs, foams, latex and natural materials. The hardness, durability and breathability of different materials have their own advantages. Some people think that when choosing a mattress, it must be "the more expensive the better."
In fact, high-quality and comfortable sleeping bedding does not have to cost a lot. A good mattress should refer to several elements: support, durability, breathability, comfort, fabric, and harmful substances. Judging from the current market price, the price of latex mattresses is relatively high and has the function of preventing mites; the price of spring mattresses is relatively low, which is more in line with the sleep habits of Asians and Europeans. Therefore, it is not the most expensive to choose yourself.
Fuji mattress reminds everyone that the mattress is good, mainly looking at two indicators:
â—† Softness: Preventive medical experts believe that the best sleeping position should be the same as standing. A mattress with good support functions, while giving the body full omnipresent support, can maintain the spine in a position like a standing position. Only when the spine maintains a natural curvature can the muscles really relax, otherwise it is replaced by a backache when getting up. The tiredness of back pain, which requires the hardness of the mattress to be moderate.
â—† Breathability: There are 3 million fine pores on the surface of the skin. These pores shrink and relax day and night, breathing, secreting sweat, excreting sebum and metabolites in the body, regulating body temperature and normal function. It is the most vigorous time of cell division. If the material of the mattress is not breathable and wicking, it will hinder the skin from breathing and excretion. The skin is easy to be rough and allergic, and it will affect endocrine function for a long time.
Founded in 1996, Fuji Mattress is specialized in the development, design, production and marketing of a complete set of healthy sleep systems. The company has a modern standard industrial plant and a high-quality talent team. Adopt the current advanced production technology. Based on the extensive absorption of traditional mattress design, the world's advanced concepts and technologies are adopted. Through the joint efforts of all employees, we will give full play to the advantages of talents and technology. Fuji Mattress will quickly become a high-grade mattress brand in the furniture industry in China.
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15-25mm Calcium Carbide: Physical and chemical properties: ores are solid brown or black block, pure white crystals (including CaC2 higher purple). Density of 2.22 g / cubic centimeter, the melting point of 2300 ° C (with CaC2 content), water immediately intense reaction to generate acetylene, and release heat, Calcium Carbide content varies with the melting point also will change.
Impurities: Caustic soda often contain calcium arsenide (Ca3As2), calcium phosphide (Ca3P2) and other impurities, and the role of water at the same time release arsine (AsH3), phosphine (PH3) and other toxic gases, so the use of Acetylene generated by calcium carbide is toxic.
Crystal structure
The most common crystal form of CaC2 is tetragonal, stable between 298K and 720K. Quartet CaC2 similar to the crystal structure of NaCl, but due to [: C≡C:] 2- ion oval, oriented, the crystal is tetragonal. In CaC2 crystal, the C-C distance is 120pm, which corresponds to the bond length of carbon-carbon triple bond, the distance between Ca and C is 259 and 282pm.
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