FLAT GLASS HARDENING

Flat glass hardening

FLAT GLASS HARDENING

The hardened glass (ESG) is manufactured on the basis of regular float type glass as well as soft and hard-coating glass, ornament glass and compound coloured glass.The base glass undergoes the hardening process which consists in heating up of the raw material to the temp. of 620 – 680 °C and then it undergoes fast cooling in a compressed air stream. As a result, there are pressing stresses created in the superficial layer which significantly increases its durability.

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The ESG hardened glass is several times more durable than a regular glass with the same thickness and in case of breaking it breaks into small particles with blunt edges and not into sharp needles. The hardened glass can be used in all places where the laws require the use of sage panels. It is used in construction, furniture industry as well as for, e.g., production of car panels.

Advantages of the WSG hardened glass: After exceeding the mechanical strength, the hardened glass cracks into fine blunt chips which allows to classify it as safe glass. The thermally hardened glass has a broad range of applications in construction, furniture, household appliances, automobile industry, railway, aviation and marine communication, transport industry and many other branches of the economy. After exceeding the mechanical strength, the hardened glass cracks into fine blunt chips which allows to classify it as safe glass. The thermally hardened glass has a broad range of applications in construction, furniture, household appliances, automobile industry, railway, aviation and marine communication, transport industry and many other branches of the economy.

  • high resistance to chemical stress
  • lower risk of injury due to the nature of the chips formed during breaking,
  • higher resistance to quick changes in the ambient temperature

Production capabilities::

The hardened glass is manufactured in our company with the use of a modern furnace with excellent parameters: make TAMGLASS PRO E.
Production sizes for the singular hardened panels: max. 2445 mm x 5100 mm, the minimal diameter must be larger than or equal to 300 mm, and thickness min. 80 mm

Semi-hardened panels (TVG) 

Semi-hardened glass is obtained by means of thermal processing (acc. to PN-EN 1863)
It aims at increase of the mechanical and thermal strength of the panels.
This type of processing can be applied to up to 10 mm thick glass.

The semi-hardened glass, due to increased bending strength and its manner of cracking, is used for layer joining in laminated glass. The layer panels can be used as elements of the frame-free facade system with point mounting.
The position of openings and cuts must be made according to the same principles as for the hardened panels.
All glass treatments must be performed prior to thermal reinforcement.
We can assume that the semi-hardened glass has mechanical strength fitting between the untempered and hardened glass.
Moreover, the increased thermal strength of the semi-hardened glass is essential in case of installation of the panels on a building facade. In case of panel cracks (the cracks run to the edge), the big pieces joined with a binder do not fall off the building facade which improves the users’ safety.

The semi-hardened panels are not classified as safe panels.

APPLICATION of the thermally reinforced glass (semi-hardened)

The thermally reinforced TVG glass, due to its characteristic crack grid, is perfect for glass fillings where the glass is a complex VSG laminate and is to perform the following functions:

a) protection against penetration of heavy bodies (falling out, falling down, break through)
b) protection against falling out of the glass pane in case of breaking
c) protection against falling out of the glass pane in structures where the glass has a linear support such as:

  • balustrades, barriers and glass partitions - in VSG laminates with annealed glass or ESG hardened glass

  • glass canopies, roofing and roofs - in VSG laminates with annealed glass or ESG hardened glass

     

  • floors, platforms, glass steps - in VSG laminates with annealed glass or ESG hardened glass

Hardened glass with screen print

The technological process in this method consists in application of an enamel layer on the horizontal table of the printing machine by means of a squeegee. The paint, after passing through the screen, forms a very thin film. The thickness of the applied layer of ceramic paint is generally thinner in comparison with the roller or pouring method and, depending on the paint used, it can be a transparent or non-transparent layer. The use of this method results in the visibility of the elements connected with the further use of the enamelled glass from the side of the enamelled surface, e.g.: sealing, fitting glues, insulation, installation elements. It is recommended to determine the application of the enamelled panels prior to the production process.

The special enamel colours, e.g. metallic or combination of many colours, can be made only upon a special order.
Their performance and application must be specifically agreed upon with the manufacturer.

Further processing of the enamelled glass, having an influence on its physicochemical properties, is inadmissible.
The enamelled panels can be used as singular panels or laminated (VSG) panels as well as in complexes (thermal insulation panels). In these applications they are subject to specific standards connected with these products.

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