When producing laminated glass, inter-layers are utilized to join the two panes together. There are several advantages to using a security interlayer; additional information on these advantages may be found here. PVB (Poly Vinyl Butyral) is a common material for this inter-layer. However, there are a variety of alternative options. PVB is one of the first inter-layers to be used in laminated glass, and it has been in use since the 1930s. It's frequently used in the automobile sector to laminate glass.
Another common security interlayer used in laminated glass is SGP (SentryGlas Plus), which has enhanced strength.
Heat-soaked, the toughened glass may be integrated with laminated glazing to create a secure pane that is difficult to shatter and much more difficult to break through.
What is the PVB interlayer?[caption class="snax-figure" align="aligncenter" width="1140"][/caption]Poly Vinyl Butyral is a solid plastic resin used to seal the gap between two panes of glass. It is created by reacting polyvinyl alcohol with butyraldehyde. This resin is attached between two glass panes, then heated and pressed together to form a laminated pane. Internal glass balustrades generally use a PVB interlayer, whereas external frameless glass balustrades have an SGP interlayer.
What is the SGP interlayer?
SentryGlas Plus is an iconoclast interlayer that provides exceptional weather resistance and strength when used to laminate glass.
The two are generally made in the same way, with heat and pressure used to the glass to melt the layer in between, which then works like glue to hold the panes together. Glass with this SGP interlayer is more expensive than glass with PVB, but it offers several advantages, including better clarity.
How does PVB work?
PVB is a standard attachment material used in architectural and automotive glass. PVB interlayer storage and processing are more complex, and temperature and humidity requirements are more stringent. When PVB is processed, the temperature is kept between 18 and 23 degrees Celsius, the relative humidity is kept between 18 and 23 percent, and the PVB water content is maintained between 0.4 and 0.6 percent. The autoclave is used for heat preservation and pressure maintenance after preheating, rolling, or vacuuming. The autoclave temperature was 120-130 ° C, the pressure was 1.0-1.3 MPa, and the duration was 30-60 minutes.
PVB complete sets of production equipment cost around $1 million, too expensive for small enterprises. DuPont, Solutia, and Sekisui were the primary producers a few years ago. The PVB from China was primarily recycled materials for secondary processing, although the quality was inconsistent. PVB producers in China have made significant progress in recent years. PVB offers high safety, sound insulation, transparency, and UV resistance, but low water resistance is easily delaminated when exposed to moisture over an extended period.
How does SGP work?
The ionic interlayer film (SentryGlas Plus) produced is known as SGP. It is a high-performance interlayer developed by DuPont. Its high performance is as follows: Mechanical characteristics are excellent, and the strength is firm. The interlayer bearing capacity of SGP Laminated Glass is twice that of PVB at the same thickness; at the same load, the bending deflection of SGP laminated glass is one quarter that of PVB; The tear strength of the PVB interlayer film is five times that of PVB at the same thickness, and it may be attached to the glass in the event of tearing without causing the entire glass to collapse.
SGP laminated glass is anti-ultraviolet. It is challenging to become yellow after prolonged exposure to the sun and rain, and the yellowing coefficient is less than 1.5. PVB interlayer film, on the other hand, has a yellowing coefficient of 612. As a result, SGP is ultra-white laminated glass.
Safety glass is another name for laminated glass. Laminated glass, as the name implies, is made up of many layers of glass. The interlayer in the center of the glass is the only thing that separates it from the rest of the glass.
Mornglass is a laminated glass specialist. We'll assist you in choosing the right glass for your needs and double-check the whole installation procedure with a team of trained experts. If you need assistance at any moment, you can reach us for practical guidance.
Looking for structural laminated glass and more innovative glass solutions to meet the specific design purpose? Find your perfect glass solutions here with Morn Glass.
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