LAMINATED GLASS
WHAT IS LAMINATED GLASS
G-Lam laminated glass consists of two or
more panes of float glass bonded together by one or several sheets of
polyvinyl butyral (PVB) interlayer which is extremely tough and resilient.
The adhesion of the PVB interlayer to the glass is optimized by a production
process based on high heat and pressure. The process achieves perfect
homogeneity of the glass sandwich and maintains the transparency of standard
monolythic float glass. In addition to transparency, G-Lam laminated glass
maintains all the other characteristics of float glass such as durability
and scratch resistance. However, it adds impact resistance, better sound
insulation and improved control of solar energy.
With all these additional qualities, G-Lam
laminated gloss has become a unique product for all types of safety and
security glazing applications.
BENEFITS
ANTI-ACCIDENT
The impact resistance, elasticity and
adhesion of PVB to gloss makes laminated glass an excellent safety glazing.
Indeed, laminated glass will resist penetration from heavy accidental
impact. In some cases, the glass might break but the splinters will adhere
to the PVB interlayer, reducing the risk of personal injury from flying
glass and protecting property against damage. Moreover, even when broken,
laminated glass remains integral, thus resisting further accidental impact
and offering protection against the weather until its replacement.
ANTI-THEFT/HIGH SECURITY
By increasing the thickness of the PVB
interlayer and sometimes the thickness of the float glass itself, laminated
glass can offer ideal protection against vandalism, robbery and theft. The
finals configuration of the laminate depends on the application risks and on
the value of the goods requiring protection. G-Lam laminated architectural
glass can vary from two-ply constructions to several PVB interlayers in
multiple-ply glass providing bullet-resistant properties.
ACOUSTICAL COMFORT
The configuration and nature of laminated
glass provides much better sound insulation compared to ordinary glass,
especially at certain frequencies. Many modern airports are now fitted with
laminated glass combining safety and sound installation properties. More
information is available on request.
SOLAR ENERGY CONTROL
G-Lam laminated glass is an ideal product
against harmful UV rays. More that 99.5% of UV can be filtered reducing
fading and discoloration of goods. In addition, laminated glass allows
control of solar energy with a choice of different colours. More information
is available on request.
ADVANTAGES & APPLICATIONS
ACCIDENT PROTECTION
Minimizing the risk of injury from
accidental impact and glass breakage or fallout is a critical glazing design
concern. The combination of glass and PVB interlayer makes laminated glass
the only glazing that can reduce the risk of laceration and glass fallout,
and continue to offer protection even if broken.
Application: Patio doors, glazing doors,
glazing walls, balconies, staircases, shower cabins, all glazing surfaces in
schools, swimming pools, public or private buildings etc. presenting a risk
accident.
BURGLARY & VANDALISM PROTECTION

By increasing the number and the thickness
of the PVB interlayers, laminated glass resists breakage from street
vandalism and “smash and grab” raids.
Application: Ground-floor glazing,
shop-fronts for anti-vandalism, overhead glazing, verandas and greenhouses.
THIEFT PROTECTION

For this kind of laminated glass, the
required impact resistance results from the thickness of the PVB interlayer
combined with the thickness of two or three glass panels. G-Lam laminated
glass then provides exceptional protection against robberies. If the impact
is heavy, star burst will appear at the point of impact but the glass itself
will remain integral helping to resist further break in attempts.
Application: Shop fronts, museums, art
protection, computer rooms, high risk private homes.
BULLET RESISTANT GLAZING

For high-security glazing, various
thicknesses of glass combined with the strong resistance of the PVB
interlayer provide a wide range of multi-laminated glass possibilities. Such
laminated glass configurations can resist penetration from high power hand
guns and rifles, helping to protect people from direct bullet injury or
flying glass fragments. More information is available in Stop-Shot
Catalogue.
Application: Cashiers in banks and post
offices, petrol stations, armoured vehicles, specific high risk shops.
| TECHNICAL DATA |
| FLOAT GLASS |
ASTM C-1036 |
| HEAT TREATED GLASS |
ASTM C-1048 / BS 6206 |
| LAMINATED GLASS |
ASTM C-1172 |
| MAXIMUM SIZE (stock) |
2250 mm x 4500 mm |
| THICKNESS AVAILABLE |
6 mm - 62 mm |
Safety and Security Glass Performances Comparison
| |
Impact Resistance (Steel Ball) |
Luminosity Transmission |
UV Filtering |
Abrasion Resistance |
| Ordinary glass and polyester film (6mm) |
Depending on the film |
Depending on the film |
Depending on the film |
Weak |
| Wired Glass (6.6 mm) |
< 1m |
80% |
54% |
Good |
| Tempered glass (6 mm) |
< 1m |
87% |
46% |
Good |
| Methacrylate (6 mm) |
< 1m |
92% |
99.9% |
Weak |
| Polycarbibate (6 mm) |
6 m and more |
82% |
99.9% |
Weak |
Laminated glass based on poured resins
(2 x 3 mm glass and 1 mm resin) |
|
|
|
|
| a. Styrenic Polyester |
1.5 m |
88% |
100% |
Good |
| b. Acrylic |
< 1.5 m |
89% |
46% |
Good |
| G-Lam laminated glass based on PVB (4.4.2) |
5 to 8 m |
88% |
99.5% |
Good |
|