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Based on the sufficiently high viscosity of the glass, bonding can take place nearly without pressure. [5] The bonding temperature needs to be high enough to reduce the viscosity of the glass material and ensures a good wetting of the bond surface, but also low enough to prevent overspreading of the glass frit material.
Liquid optically-clear adhesive (LOCA) is liquid-based bonding technology used in touch panels and display devices to bind the cover lens, plastic, or other optical materials to the main sensor unit or each other. These adhesives improve optical characteristics and durability.
The solder glass must have a coefficient of thermal expansion which is equal or a little lower than that of the soda-lime glass. Classically high lead containing glasses are used, but it is also possible to substitute these by multi-component glasses e.g. based on the system Li 2 O-Na 2 O-K 2 O-CaO-SiO 2-B 2 O 3-ZnO-TiO 2-BaO-Al 2 O 3.
Natural sealants and adhesive-sealants included plant resins such as pine pitch and birch pitch, bitumen, wax, tar, natural gum, clay (mud) mortar, lime mortar, lead, blood and egg. In the 17th century glazing putty was first used to seal window glass made with linseed oil and chalk, later other drying oils were also used to make oil-based ...
It has a density of 1.17–1.20 g/cm 3, [1] [16] which is approximately half that of glass, which is generally, depending on composition, 2.2–2.53 g/cm 3. [1] It also has good impact strength, higher than both glass and polystyrene, but significantly lower than polycarbonate and some engineered polymers.
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