We usually call Tempered glass safety glass, and another type of safety glass named tempered laminated glass. Laminated glass is basically a glass sandwich. It is made of two or more plies of glass with a vinyl interlayer(EVA /PVB /SGP) between. The glass will tend to stay together and case one is broken – thus qualifying as a safety glazing material.

Because laminated glass holds up to impact better than other types of glass, this is what is used in modern windshields. The sandwiched interlayer gives the glass structural integrity and keeps it from shattering apart like tempered glass might.

Cost: SGP＞PVB

Color: PVB＞SGP

Bulletproof glass is laminated glass, it is several film and glass laminated. Normally, it comes with PVB, dear client, if you have enough budget, then think about SGP : )Here I want to tell you the difference between PVB and SGP laminated glass.

1- Material:

SGP is an abbreviation of SentryGuard Plus Interlayer, crated by American brand Dupont, on June 1, 2014, Kuraray Co., Ltd. became the exclusive licensee for the technology and trademark of SentryGlas®.

PVB is Polyvinyl butyral, many different suppliers can produce this material all around the world.

2- Thickness:

The PVB thickness is 0.38mm, 0.76mm, 1.14mm, multiple of 0.38mm, the SGP thickness is 0.89mm, 1.52mm, 2.28mm, etc.

3- The main difference is

“SGP” will stay standing when both sides are broken as compared to “PVB” it will fall down or break when both sides have become damaged. The SGP laminated glass is five times stronger and up to 100 times stiffer than PVB laminated glass. That’s why designers like to use SGP laminated glass for application which face to bad weather like ice storms, hurricane, and cyclone, also for someplace with war or need high security.

Kindly note, it doesn't mean SGP is safer than PVB all the time.

For example, "a laminate with SGP will not pass safety standards for a windshield because the SGP is stiffer and the laminated glass would be too stiff for head impact. There is a reason that SGP is not used in laminates in automobile glazing."

5- Clarity:

The SGP yellow index is smaller than 1.5, while normally the PVB yellow index is 6-12, so the SGP laminated glass is much more clear than PVB laminated glass.

6- Application

For PVB laminated glass: railing, fence, stair, floor, shower room, tabletop, windows, glass sliding door, glass partition, glass skylight, glass curtain wall, windows, glass doors, glass facade, windshields, Bullet-proof glass, etc

And SGP: Bullet-proof glass, Explosion-proof glass, High-speed train windshield, Railings -SGP hurricane glass, Ceiling, skylight, staircase, steps, floor, fence, canopy, partition, etc.

Since SGP is more expensive than PVB laminated glass, if the environment or situation is not bad, PVB is more cost-effective than SGP laminated glass.

(From Susan Su, LinkedIn)