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.
It is made of high-performance ionomer resin, without any plasticizers.
100 times stiffer and 5 times stronger than PVB interlayers.
SentryGlas interlayer bears a higher load than PVB laminate, achieving the same loads by the thinner glass.
Exceptional stability, and has no edge defects on 20 years applications.
DuPont SGP has only a 1.5 yellowness index, while ordinary PVB with 6 to 12 which is 4 to 8 times than SGP.
Superior compatibility with approved sealants, ceramic frit coatings, glass coatings, metal, fabric, wire, mesh, etc.
Excellent salt-spray performance, and zero defects even after 3000 hours test.
safe breakage and fragment retention after glass broken
enhanced impact performance in hurricane environment, and security from a variety of threats.
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.
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.
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.
SentryGlas interlayer glass shows excellent performance over a broad temperature range than PVB interlayer.
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.
Security required places:
hurricane, typhoon, or storm glazing
Safety required places:
transportation, architectural and structural glazing
enclosures, podiums, canopies
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
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.