Automotive side window glass composition and type
[Zhongbo.com] The general automotive glass uses silicon glass, in which the main component silica content exceeds 70%, and the rest is composed of sodium oxide, calcium oxide, magnesium, etc., and is produced by a float process. During the production process, the material is melted when heated to a temperature of 1500 ° C, and the solution is poured into a suspension tank (liquid tin) through a refining zone of about 1300 ° C, and cooled to about 600 ° C. At this stage, two parallel sides of particularly good quality are formed. The planar body (the upper surface is the solution plane, the lower surface is the liquid tin upper plane), and then passes through the cooling zone to form the glass and is cut into a prescribed size. The glass is then further processed into tempered glass (TSG) or laminated glass (LSG).
The finished product car glass should have no obvious bubbles and scratches in appearance. In order to ensure the quality of automotive glass, the industry divides automotive glass into four types: Class A and Class B laminated glass, regional tempered glass and tempered glass. Among them, Class A laminated glass has higher safety performance. National standards stipulate that the front windshield must use Class A laminated glass, Class B laminated glass or regional tempered glass. Their codes in the certification mark are LA, LB, Z, and the certification marks are screen printing, sand blasting, etc. The process mark is located at the lower corner of the glass. The code for tempered glass is T. It can only be used for positions other than the front windshield. LA, LB, and Z mark glasses can be applied to all glass positions of the car.
T-shirts are also known as T-shirts. At first it was underwear, which was actually a lapel half-open collar, and later it developed into outerwear, including two series of T-shirt undershirts and T-shirt shirts. There are different opinions about the origin of the name of T-shirts. One theory is that dock workers who unloaded tea in Annapolis, Maryland, USA in the 17th century wore short-sleeved shirts. People abbreviated "Tea" (tea) as "T". , this kind of shirt is called T-Shirt, that is, T-shirt; the second is that in the 17th century, British sailors were ordered to add short sleeves to their vests to cover armpit hair and avoid unsightly; there is another saying that the sleeves It forms a "T" shape with the upper body, that is, its clothes have a T-shaped stitched collar, hence the name. In 1913, the U.S. Navy mandated that sailors should wear a crew-neck, short-sleeved white singlet under their overalls, one of the reasons for covering the thick chest hair of sailors. The raw materials used for T-shirts are very wide, generally cotton, linen, wool, silk, chemical fiber and their blended fabrics, especially pure cotton, linen or linen-cotton blended fabrics, which have the advantages of breathability, softness, comfort, coolness, sweat absorption, heat dissipation, etc. . T-shirts are often made of knitted fabrics, but due to the constantly changing needs of consumers, the design and production are also increasingly renovated. Therefore, T-shirts made of woven fabrics are also on the market one after another, becoming a new member of the T-shirt family.
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