GENERAL GLASS EVALAM LAMINATED GLASS

General Glass in Stock EVA (Ethylene-Vinyl-Acetate) interlayers are clear, diffused white and bright opaque white.

  • Interlayer thickness from .030″ to .060″
  • Available in sizes up to 60″ x 120″

CERTIFICATIONS

EVALAM meets ASTM 1036, CAT 1 and 2 safety requirements. ANSI Z.97.1

EXCELENT COMPATABILITY

EVA Laminated glazings could be composed of many different types of monolithic glass. They could be annealed, tempered, wired, patterned, tinted and coated glass.

ADHESION

• The adhesion factor of EVALAM VISUAL offers a lower delamination index vs PVB. Evalam Visual has Three times higher adhesion than PVB, making it a product that is especially suitable for glasses that have to withstand mechanical stresses or fatigue, such as doors, stairs, or exterior facades.

OPEN EDGE RESISTANCE

• EVA is, in general, more resistant than PVB when exposed to moisture at open edge. It remains to be determined the quality of each individual EVA in the existing market.
• EVALAM VISUAL has been developed to have a strong resistance to humidity. It then avoids the dreaded delamination that appears under unfavorable weather conditions and over time when a laminated glass is installed with open edge.
• This fact is apparent when we submit EVALAM VISUAL and PVB to a Humidity and destructive test. At eight hours the PVB suffers defects more than 2.5 cm from the edge of the glass piece while EVALAM VISUAL remains unchanged in perfect condition after 20 hours.

FACADES BEHAVIOR

EVALAM Visual has better adhesion properties than PVB at room temperature, but: Did you know that Summer’s average temperature in facades in many countries is around 40-50° C, in this conditions PVB completely loses its adhesion?
Visual Evalam has a Tg of -18 to + 39° C
*Tg is the transition temperature (solid-solid) when a strong change of the physical and mechanical properties of the material occurs.
The polymer when cooled below -18 °C, becomes stiff and hard. Above this temperature they are soft and gummy.
Tests with Evalam Visual are always at a temperature above its Tg -18°C so they are true tests and barely affect the general properties of the interlayer.
On the contrary PVB, from 39°C upwards, the material becomes soft and gummy, losing initial properties such as adhesion to the glass, a property that is not lost with Visual thanks to its high crosslink value and the fact it is thermostable. This data is easily checked with
a peel test where a piece of glass is laminated to a piece on PET (polyester sheet) and is subjected to a heating process of 40°C for two hours. With PVB, the PET and PVB can be removed from the glass by hand, meaning at 40°C the PVB has little or no adhesion value. On the contrary PVB, from 39° C the material becomes soft and gummy, losing initial properties such as adhesion to glass, property that is not lost with Visual thanks to its high crosslink it does thermostable.