4.2 SafeLite PVB
SAFELITE® PVB Laminate is a safety glass made by a heat and pressure process that laminates two or more sheets of glass with a Polyvinyl Butyral (PVB) interlayer between them. The standard and minimum interlayer is 0.38mm thick, but it is also available in 0.76, 1.14 or 1.52mm.
All interlayer thicknesses pass the Grade A safety glass test and 1.52mm is also used for Anti Bandit Glass. Toughened laminates use a 0.76, 1.14 or 1.52mm interlayer, and multiple interlayers can be used in special applications like Cyclone Glass which has 3.8mm of interlayer. Tinted and clear interlayer can be combined with special coloured interlayer. Translucent interlayer is available in two shades, Opalucent and Soft White.
SAFELITE® PVB Laminate Stocklines
Clear, Grey, Green, Bronze and Blue.
Opalucent and Soft White.
Clear Low E, Sunergy, Comfort Plus.
Refer Section 18 for stocked thicknesses and sheet sizes.
The normal maximum size for Safelite PVB laminated glass is 3660 x 2440mm, however larger sizes up to 5100 x 3120mm may be available on request.
4.3 SafeLite CIP
SAFELITE® CIP is a Grade A Laminated safety glass manufactured by Metro GlassTech to the
requirements of AS/NZS 2208 and carrying Bureau Veritas certification. It is a “Cast
in Place” laminate made by spacing two sheets of glass with a clear edge tape and then
pouring a special liquid resin into the cavity between them. The resin is cured in the factory
by UV light to a hard plastic state, bonding the glass sheets together to produce a Grade A
SAFELITE® CIP laminate is available with two resin types:
- Resin S – for strength and safety applications.
- Resin A – for acoustic and safety applications.
The standard thicknesses of resin interlayer is 1.0mm,
with 1.5mm and 1.8mm available. Most glass types can
be laminated depending on the UV transmission of the
SOUNDSTOP® Acoustic Laminated Glass
Acoustic laminated glass is specifically designed to reduce sound intrusion
into buildings. SOUNDSTOP® is an acoustic grade CIP laminated safety glass consisting of two sheets of
glass with a 1.0mm or 1.5mm acoustic resin interlayer.
This product has excellent sound reduction properties
due to the elastic nature of the special resin interlayer.
Refer Section 11.4 for more information on acoustics.
Opalite is available in a shade range from white to translucent by altering
the white resin mixture.
Standard Translucent levels are:
Opalite White (2% white).
Opalite White Translucent (1% white).
Opalite Translucent (0.75% white).
Opalite Light Translucent (0.5% white).
All PVB laminates have very good resistance to fading from UV light and in most situations
they are recommended. However, in some situations where the lamination of specialty glass
is required with UV protection a special resin is required with anti-fade additives. These
situations require special polyester anti-fade resin which provides excellent UV elimination
of 100% in the 300-380 nanometre wavelength range. For standard glazing situations PVB
laminate is a more economic option with 99% UV elimination in the same wavelength range.
Refer Section 11.3 for more information on UV elimination and fading.
Glass Bends and Curves
Glass bends can be laminated by the CIP process and enquiries should be
submitted to Metro GlassTech.
Refer Section 8.1 for glass bends and curves.
SAFELITE® CIP multi-laminates can be manufactured to any specification with clear float glass. For other glass types enquiries must be submitted. The minimum thickness for glass sheets is 3mm and the maximum glass size is dictated by the 250kg maximum weight restriction. The minimum interlayer thickness is 1.5mm. Edge tape deletion is not an option.
Edge Tape Deletion
The use of clear edge tape as standard makes edge tape deletion unnecessary
in most situations. However, the edge tape is 6mm wide and is visible in some situations,
especially with clear glass. Edge tape deletion is possible, but is not offered as a service.
Note. Butt jointing Safelite CIP laminated glass in a faceted or picture view window is not recommended.
The normal maximum size is 3500 x 2400mm and/or a maximum weight of 250kg. The normal minimum size is 400 x 300mm. Size restrictions are shown in the following table:
For heavy weight laminates with 8mm and thicker glass the weight will normally
limit the size. To check the approximate weight use the following formula:
Weight kg = 2.6 x total glass thickness (mm) x area (m2)
Example for a 3000 x 1000mm 10/12 thick laminate
2.6 x (10 + 12) x 3m2 = 171.6 kg.