Definition
DuPont SGP Interlayer, SentryGlas Interlayer, or SentryGlas Plus Interlayer is a kind of ionoplast interlayer initially designed for hurricane glazing applications in Florida, the United States by DuPont. Now owned by Kuraray.
Characteristics
Top-quality material:
It is made of high-performance ionomer resin, without any plasticizers.
High Strength:
100 times stiffer and 5 times stronger than PVB interlayers.
Lighter Weight:
SentryGlas interlayer bears a higher load than PVB laminate, achieving the same loads by the thinner glass.
Durability:
Exceptional stability, and has no edge defects on 20 years applications.
High Clarity:
DuPont SGP has only a 1.5 yellowness index, while ordinary PVB with 6 to 12 which is 4 to 8 times than SGP.
Compatibility:
Superior compatibility with approved sealants, ceramic frit coatings, glass coatings, metal, fabric, wire, mesh, etc.
Higher Performance:
Excellent salt-spray performance, and zero defects even after 3000 hours test.
Safety:
safe breakage and fragment retention after glass broken
Security:
enhanced impact performance in hurricane environment, and security from a variety of threats.
UV Control:
DuPont SGP interlayer can block over 99% UV radiation.
SGP Interlayer Datasheet
SGP Interlayer Technical Manual for Structural Engineers
SentryGlas Interlayer Tests
Florida 20-year Test:
SentryGlas samples are fully exposed to the Florida climate for 20 years, without any signs of weathering, visible moisture intrusion, or delamination effects.
Weathering Test:
specimens exposed outside for 3000 hours in South Florida, no visible bubbles and delamination.
Edge Stability Test:
SGP glass samples go through the salt spray fog test continuously for 3000 hours, the glasses remain unchanged in terms of transparency, edge cloudiness, or delamination.
Sealant Compatibility Test:
SGP specimens were tested under accelerated QUV, UV radiation, high-temperature, and high humidity circumstances without visible delamination or other defects.
High-Temperature Bake Test:
SentryGlas samples withstand an environment of 100 degrees at least for 16 hours. No air bubbles formation appears inside the 12mm from the glass edge.
Compatibility with Ceramic Frit Coatings:
76 Bake Test, SentryGlas shows no visual defects found, such as coating, bubble, delamination, or any other defects.
Compatibility with Solar Shading or Glass Coatings:
by placing SentryGlas interlayer directly in contact with AGC, Cardinal, Guardian, PPG double and triple silver Low-e glass. There is no moisture or salts spread to Low-e coatings.
Impact Test:
Pendulum impact by using shot bags to evaluate breakage characteristics.
Ball-drop test by using a steel ball drops from a specific height onto the glass to determine the impact resistance.
Missile impacts are conducted using timber missiles to impact the glass at different speeds. Anti-intrusion tests, bomb-blast and BRG tests, etc.
Post-glass Breakage Test:
by define, the fragments state, scale, and glass pattern of broken glass. It is less quantitative than pre-glass breakage methods, the tests still provide valuable information about the post-breakage strength and stiffness of the SentryGlas interlayer.
Glass Retention or Adhesion Test:
SGP glass samples performed well at low temperature -12 degrees. When subjected to 5 load cycles of 4.4 kN and little glass loss was found. Even after broken, there are no widespread adhesion problems appear.
Toughness Tests:
SentryGlas interlayer glass shows excellent performance over a broad temperature range than PVB interlayer.
Ballistics-resistant Test:
According to Indoor UL752, NIJ 0108.01, and EN1063 relative security standards, samples achieve the desired level of ballistics resistance.
Blast Performance: Shock Tube Test & Area Testing
Fire performance Test:
the SentryGlas samples comply with CPSC 16 CFR 1201 and show superior performance in terms of flame spread and flammability in the fire test.
Applications
Security required places:
hurricane, typhoon, or storm glazing
Safety required places:
transportation, architectural and structural glazing
Exterior glazing:
enclosures, podiums, canopies
Point-support system:
facades, curtain walls, skylights
Exposed edge glass:
balcony, balustrade, handrail system
Load bearing system:
stair tread, stairs, floor, walkways, sightseeing bridge
Forced entry places:
governmental buildings, bank, prison, museums, relic showcase
Conclusion
As the only structural interlayer that can be combined with the laminated glass, DuPont SGP interlayer provides a new solution for the architects and designers.
