What is the stress spot of tempered glass?
Release time:
Jul 02,2024
Tempered glass in its manufacturing process, often naturally form a unique visual phenomenon, we call it the pressure spot, or more commonly known as the stress spot. This phenomenon does not stem from any qualitative flaws, but is a natural manifestation of material science and physics in the glass processing process. Below, we will elaborate on the formation and characteristics of tempered glass pressure spots
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Tempered glass in its manufacturing process, often naturally form a unique visual phenomenon, we call it the pressure spot, or more commonly known as the stress spot. This phenomenon does not stem from any qualitative flaws, but is a natural manifestation of material science and physics in the glass processing process. Below, we will elaborate on the formation and characteristics of tempered glass pressure spots:
Reason for formation: Tempered glass is manufactured by heating ordinary flat glass to close to the softening temperature (about 600°C), and then quickly and uniformly cooling to room temperature. This process creates a large tensile stress inside the glass, while the surface is subjected to compressive stress.
Since it is difficult to achieve 100% uniformity during heating and quenching cooling, there will be uneven stress distribution inside the glass. This non-uniform stress distribution is the main reason for the formation of pressure spots.
Optical properties: Tempered glass is an anisotropic material. When the light passes through, due to the existence of internal stress, the light will undergo birefringence, that is, it is decomposed into two beams of polarized light with different propagation speeds (fast light and slow light).
When these two beams intersect at a certain point, a phase difference occurs due to the difference in propagation speed. When the amplitude direction of the two beams of light is the same, the light intensity will be strengthened to form a bright field of view (bright spot); when the amplitude direction is opposite, the light intensity will be weakened to form a dark field of view (dark spot).
Impact: Pressure spots are an inherent characteristic of tempered glass, not only in automotive glass, but also in other tempered glass products, such as windows and partitions.
Although the pressure spot will not affect the reflection effect, transmission effect or resolution of the glass, in some cases, such as when applied as a large-area curtain wall, the pressure spot may adversely affect the appearance of the glass, and even affect the overall appearance of the building. effect.
The pressure spot of tempered glass is an optical phenomenon caused by uneven stress distribution during the manufacturing process, which is a normal characteristic of tempered glass, not a quality problem. Although the pressure spot may affect the appearance of the glass in some cases, it does not affect the basic performance and use of the glass.
OK ~ that's all for today's sharing. if you need to know the cost of Guangdong Haibo tempered glass, you can consult Haibo special glass Cao Haibo to help you solve it faster.Guangdong HaiboTempered glass on the cost of doubt oh
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