High borosilicate glass (also called hard glass) is also called "borosilicate glass 3.3" because of its linear thermal expansion coefficient (3.3 x 0.1)*10-6/K. It is a special glass material with low expansion rate, high temperature resistance, high strength, high hardness, high transmittance and high chemical stability. Because of its excellent function, it is widely used in solar energy, chemical industry, pharmaceutical packaging, electric light source, craft accessories and other professions. Its outstanding function has been widely recognized by all walks of life in the world, especially in the field of solar energy, which has been widely promoted in developed countries such as Germany and the United States.
High borosilicate glass and high borosilicate glass have very low coefficient of thermal expansion, high temperature resistance and 200 degree temperature variation resistance. High borosilicate glass is used for reflective heat-resistant lamp cup of halogen lamp and it is necessary to select heat-resistant glass electrical equipment, such as microwave oven special glass turntable, microwave oven lampshade, stage lamp reflection cup, drum washing machine observation window, and other heat-resistant teapot and teacup.
Glass quality is mainly to check smoothness, observe whether there are quality defects such as bubbles, inclusions, scratches, lines and fog spots. Glass is a transparent object. When selecting, the quality can be identified by visual inspection.
High borosilicate glass is safe and non-toxic. High borosilicate glass is made by using the conductive property of glass at high temperature, melting glass by heating inside the glass, and processing by advanced production technology. High borosilicate glass is harmless to human body. It is used for glass turntable for microwave oven, observation window of drum washing machine and tea cup of heat-resistant teapot. Teacups can be made to clarify that there should be no lead. There are two kinds of crystal glass containers in the market: lead-free crystal glass and lead-containing crystal glass. The former generally contains potassium, most of which are high-grade handicraft products and are marked on the outer packaging; the latter contains lead, i.e. common crystal glassware on supermarkets and floor stalls. Its lead oxide content can reach 24%. Lead-containing glassware is harmful to human health. Therefore, glassware contaminated with food should be free of lead.
Zhongshan Glass Sealing Tank
Glass is the raw material of glass. The raw material is high borosilicate glass. It is fired at high temperature of more than 600 degrees. It is a new type of environmental protection tea cup. Glass is divided into double-layer glass and single-layer glass, its production process is different, double-layer advertising cup of the main habits of demand, can be printed on the inner logo company, for promotional gifts or gifts, and the role of thermal insulation is becoming more sophisticated.
Glass para-miscrystalline inorganic nonmetallic materials are generally made from a variety of inorganic mineral deposits (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) as the main raw materials, while others are made from a small amount of auxiliary raw materials. Its main components are silica and other oxides. The chemical composition of glass is Na2SiO 3, CaSiO 3, SiO 2 or Na2O CaO 6SiO 2. The main component of glass is silicate complex salt, which is an amorphous solid with irregular structure. Widely used in buildings, used to isolate wind and light, attributed to mixtures. There are also colored glasses with oxides or salts mixed with certain metals, and tempered glasses made by physical or chemical methods. Some transparent plastics, such as polymethyl methacrylate, are sometimes called plexiglass.
Cup, household utensils, drinks or other liquid utensils, most of the base type is straight or open, mouth diameter and cup height nearly equal. They have flat bottoms, ring feet or high feet. Archaeological materials indicate that the earlier cups began in the Neolithic Age. Whether Yangshao civilization, Longshan civilization or Hemudu civilization sites, pottery cups are found. In this period, cups are more common and diverse: eared cups with one ear or two ears; foot cups are mostly conical, tripod cups, masked cups, high handle cups, etc. According to the different materials, they can be divided into glass, plastic cups, ceramic cups, wooden cups and so on.