advantage
The first is that the strength is several times higher than that of ordinary glass, and it is resistant to bending.
The second is the use of safety, and its increased carrying capacity improves the fragile nature. Even if the toughened glass breaks down, there are small pieces with no acute angles, and the damage to the human body is greatly reduced. Tempered and heat-resistant properties of tempered glass are 3 to 5 times higher than those of ordinary glass. Generally, they can withstand temperature changes of more than 250 degrees, which has a significant effect on preventing hot burst. It is a kind of safety glass. To ensure the safety of high-rise buildings to provide qualified materials.
Shortcomings
1. After tempered glass can no longer be cut and processed, the glass can only be processed to the required shape before tempering, and then tempered.
2, Although the strength of tempered glass is stronger than ordinary glass, but the tempered glass has the possibility of self-explosion (self rupture), and common glass does not have the possibility of self-explosion.
3, the surface of the tempered glass will have irregularities (wind spots), there is a slight thickness thinning. The reason for the thinning is that after the glass is softened by the hot melt, the glass is rapidly cooled by the strong wind force, and the crystal gap inside the glass is made smaller and the pressure becomes larger, so the glass is thinner after tempering than before tempering. Under normal circumstances 4-6MM glass thinning 0.2-0.8MM after tempering, 8-20MM glass thinning after tempering 0.9-1.8MM. The specific degree depends on the equipment, which is why the tempered glass cannot be mirrored.
4. The flat glass used in construction after the tempering furnace (physical tempering) is generally deformed. The degree of deformation is determined by the equipment and technicians. To a certain extent, the decorative effect is affected (except for special needs).
Screws are threaded fasteners that create permanent or temporary assemblies. They are inserted and removed by turning in one direction or another. Wood screws, floor screws, and sheet metal screws have flat heads that sit flush when holding material together. Machine screws fasten metal to metal and are inserted into a prethreaded hole or mated with a nut. Thread-cutting screws are self-tapping screws that cut away and remove the surrounding material to create a tapped hole. Deck screws resist rust and corrosion to hold outdoor decking materials together. Drywall screws have fine tips, coarse threads, and tapered bugle heads to penetrate drywall and grip wood without damaging material. Hex-head bolts, cap screws, and lag screws are driven with wrenches rather than screwdrivers or drill bits. Captive panel screws and thumb screws can be tightened and loosened without tools on parts that are frequently removed such as access panels. Screw caps can help to cover screw heads for both safety and aesthetic purp
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