Multi-layer SGP Toughened Laminated Glass Heat Soaked Testing

Toughened laminated glass is composed of at least two panes of tempered glass by PVB or SGP film. It has a much higher thermal shock resistance than float laminated glass.

When the pane breaks, the small fragments with blunt edges generally remain stuck to the PVB or SGP film. It is difficult to pierce the film, which considerably reduce the risk of injury.

Toughened Laminated Glass With Holes & Polished Edges

Heat Soaked Testing

A rare but nonetheless undesirable property of tempered glass is spontaneous breakage: tiny inclusions of nickel sulfide, invisible to the naked eye, expand in volume over time, and can cause the pane to break unexpectedly even years after installation. One reliable means of detecting nickel sulfide inclusions is the heat soaked test, in which the panes are warmed to about 290℃. During a soak time of about four hours in the heat soak oven, the tempered glass panes will nickel sulfide inclusion will probably break and hence never be installed in the first place.

Packing & Loading

Application

1. Skylight, storefront, office indoor partition;
2. Shower door, sliding door, swinging door;
3. Pool fence, balustrade, balcony;
4. Dining table, glass furniture;
5. Window, curtain wall, stairs, glass wall, glass railing;
6. Splash back, shower screen, glass floor.

What is the difference between PVB laminated glass and SGP toughened laminated glass?

Early laminated glass was generally produced by PVB film. PVB film was originally developed for automotive glass rather than for the building curtain wall industry. Although PVB film has been widely used for many years in the construction industry and gets good performance, it is not suitable for high-performance glass curtain walls due to the features of PVB film as follows:

Flexibility, softness and small shear modulus
The two glass sheets will have relative slip after being stressed and then it makes less load capacity and larger bending deformation
The SGP (SentryGlas® interlayer) is 5 times stronger and up to 100 times stiffer than PVB films. Besides its strength, SGP retains its clarity – even after years of service.

Comparing with laminated glass with PVB film, the performance of SGP tempered laminated glass is superior:

1. SGP laminated glass has a high bonding ability to glass and strong tear strength, which can prevent the glass from breaking and scattering.

2. SGP laminated glass has a strong protective ability which can prevent natural disasters and human damage, and it has sufficient resistance to hurricane, earthquakes, violence, theft, etc.

3. SGP laminated glass can withstand the sudden impact, which can prevent the glass from shattering or the whole out and avoid people and articles flying out and falling.

4. SGP laminated glass will stay standing when both sides are broken. PVB laminated glass will fall down or breaks when both sides have become damaged.

5. SGP laminated glass can either bear greater loads or – at the same load – can be reduced in glass thickness without compromising safety.

6. SGP laminated glass is much less vulnerable to moisture exposure or yellowing over time.