News

People who often ride in cars may notice a small detail, a small black dot around the edge of the windshield. Many people believe that this is a manufacturer's sticker and do not remove it horizontally or vertically, but some car owners with OCD even want to remove all these "small black spots". So what exactly are these 'little black dots' used for? Can you remove it? There are also many opinions online about these black spots. Let's take a look first and see if there is anyone who shares the same idea as you? 1： Used for capturing and focusing electronic cameras on the road 2： The area at the distance of the black dot allows the radio to sense signals and pass through 3： It is a rain sensor with active wipers 4： Light sensing area of active headlights It seems somewhat possible But in fact, all four statements above are wrong! In fact, these small black dots do have practical scientific applications We will find that the vast majority of car windows have these "small black dots" or other shapes, but they all have one characteristic: they are all black and the picture becomes smaller and smaller until it disappears. In fact, these small black spots have a great effect. They can maintain the car windows in the cold winter or hot summer, reducing external damage to the windows. So how do these small black spots maintain the car windows? Our car glass is fixed to the car with glue. In the hot summer, when the car glass is exposed to sunlight, the temperature of the metal frame around the glass will increase, causing it to swell and increasing the risk of car window explosion. But in winter, the temperature is low and the inside of the car is hot, which leads to a large contrast between the surrounding frame and the center, and there is also a risk of window explosion. And these small black dots gradually turn into urine from the window frame to the center, which is a transition that disperses the heat expansion and reduces the pressure on the window, reducing the risk of explosion. Simply put, the window frame heats up faster and the glass heats up slower. We need to use small black dots to transfer heat and reduce the pressure on the car window, avoiding glass breakage.

1. Ingredients, according to the designed material list, weigh various materials and mix them evenly in a mixer. The primary materials for glass include quartz sand, limestone, feldspar, soda ash, boric acid, etc. 2. Melting, heating the prepared materials at high temperatures to form a uniform, bubble free glass liquid. 3. Forming is the process of transforming molten glass into solid products with a fixed shape. Forming can only be carried out within a relative temperature range, which is a cooling process. Glass first transforms from a viscous liquid state to a plastic state, and then to a brittle solid state. Including manual and mechanical forming. 4. Annealing, glass undergoes drastic temperature and shape changes during forming, leaving thermal stress in the glass. If directly cooled, it is likely to split on its own during the cooling process or during future storage, transportation, and use (commonly known as glass cold explosion). In order to eliminate the phenomenon of cold explosion, glass products need to be annealed after forming. Annealing is the process of holding or slowly cooling the glass within a certain temperature range for a period of time to remove or reduce the thermal stress in the glass to a desired value. 5. Tempered, in addition, some glass products can undergo stiffening treatment to increase their strength. Including: physical hardening (quenching), used for thicker glass cups, tabletop glass, car windshields, etc; Chemical stiffening (ion exchange) is used for watch cover glass, aviation glass, etc. The principle of stiffening is to generate compressive stress on the surface layer of glass to increase its strength.  

The processing difficulty of high-precision curved tempered glass is mainly reflected in aspects such as controlling the curvature accuracy, ensuring the uniformity of glass thickness, high production technology thresholds, and complex post-production inspection. Processing difficulties High radian accuracy is required High-difficulty curved tempered glass requires precise bending while maintaining high strength, with the curvature deviation typically controlled within ≤2mm. If the bending is inaccurate, it can lead to poor fit with the frame during installation, resulting in gaps or stress concentration, which affects the overall structural safety. It is difficult to ensure the uniformity of glass thickness During the hot bending process, the glass is in a softened state at high temperatures (approximately 550–650°C). If the process is not properly controlled, it is easy to cause the middle part to be too thin or too thick. This not only affects the service life, but also may lead to spontaneous breakage or damage due to local stress imbalance during use. The tempering and hot bending processes require coordinated control The curved glass must first undergo hot bending and shaping before being tempered. However, rapid cooling during the tempering process can introduce new internal stresses. If these stresses are not properly superimposed with the bending stress, it can easily lead to ripple deformation, optical distortion, and even cracking. High dependence on molds and equipment Hot bending requires the use of high-precision molds, and different molds need to be customized for different curvatures. The surface quality of the mold directly affects the optical performance of the finished glass product. Defects such as pitting and mold marks can affect the visual effect.

The display glass panel primarily utilizes information display glass, with the core material being TFT-LCD glass substrates made from high-purity quartz sand (siliceous raw material) and ultra-thin flexible glass (UTG). 1. Core material composition TFT-LCD glass substrate Main components: high-purity quartz sand, soda ash, limestone, etc., which are melted at high temperatures to form alkali-free borosilicate glass. Key characteristics: alkali-free, high light transmittance, high flatness, with thickness controllable within 0.5 millimeters, serving as the "load-bearing wall" of liquid crystal display panels. Ultra-thin flexible glass (UTG) Thickness: The thinnest can reach 30 micrometers, which is only 1/4 of ordinary printing paper. Advantages: It can withstand millions of consecutive bends without breaking, and its weather resistance is superior to that of organic materials (such as CPI). It is suitable for folding screen phones and tablets. Strengthening method: Through chemical strengthening (ion exchange) and high alumina formula to enhance toughness, achieving "thin yet strong".