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KINGSTAR GLASS

SGP Laminated Glass | High-Performance Structural Safety Glass for Architectural Applications from KINGSTAR BUILDING GLASS

KINGSTAR BUILDING GLASS SGP Laminated Glass is a premium structural safety glass manufactured using SentryGlas® (SGP) ionoplast interlayer technology. Originally developed by DuPont and now manufactured by Kuraray, SGP (originally known as SentryGlas® Plus) is a stiff, high-strength interlayer that delivers exceptional structural performance, post-breakage integrity, and long-term durability. With a shear modulus more than 50 times that of PVB, tear strength 5 times higher, and rigidity 100 time

Product Detail

What is SGP Laminated Glass?

SGP laminated glass is a safety glass product manufactured by bonding two or more glass plies with a SentryGlas® (SGP) ionoplast interlayer. Unlike traditional PVB (polyvinyl butyral) interlayers, which were originally developed for automotive windshields and are softer and more flexible, SGP is a high-performance interlayer engineered specifically for demanding architectural applications.

The SGP interlayer is composed of an ionoplast polymer—a tough, rigid plastic material that provides exceptional mechanical properties. It is extruded without plasticizers, which eliminates the risk of plasticizer migration and ensures long-term edge stability without delamination. This allows SGP laminated glass to be used in 'open edge' applications such as frameless balustrades and point-supported facades where the edge of the glass is exposed to the environment.

The product was first introduced in 1998 as SentryGlas® Plus (SGP). Over time, the 'Plus' was dropped and the product became known as SentryGlas® or SG® interlayer. Today, SGP is manufactured by Kuraray and has been used in some of the most challenging architectural projects of the past 25 years.

SGP vs. PVB: Key Performance Comparison

Feature	SGP (Ionoplast) Interlayer	PVB Interlayer
Shear Modulus	50x that of PVB	Baseline (1x)
Tear Strength	5x that of PVB	Baseline (1x)
Rigidity/Stiffness	100x that of PVB	Baseline (1x)
Load-Bearing Capacity	2x that of PVB	Baseline (1x)
Deflection Under Load	1/4 of PVB laminated glass	Baseline (4x SGP)
Interlayer Thickness	0.89mm, 1.52mm, 2.28mm	0.38mm multiples
Edge Stability	Excellent; open-edge capable	Requires edge sealing
UV Resistance	Excellent; no yellowing	May yellow over time
Post-Breakage Residual Strength	Exceptional; holds 3300kg load	Limited
Operating Temperature	Effective above 50°C	Performance degrades at high temperatures
Typical Applications	Structural facades, balustrades, canopies	Standard windows, interior glass

SGP's shear modulus is more than 50 times that of PVB. This means that when SGP laminated glass is subjected to force, there is essentially no sliding between the glass plies. The two glass plies work as a single, monolithic piece of glass, with a bearing capacity twice that of PVB laminated glass . Under equal loads and thicknesses, the deflection of SGP laminated glass is only one-quarter that of PVB laminated glass .

Comparing PVB to SentryGlas laminates, SGP solutions can be 15 percent thinner and lighter while being 66 percent stronger than PVB laminates.

Key Features

Exceptional structural strength: Shear modulus 50x that of PVB, tear strength 5x, rigidity 100x.
Superior load-bearing capacity: 2x the load capacity of PVB laminated glass.
Reduced deflection: Only 1/4 the deflection of PVB under equal loads.
Thinner, lighter designs: SGP allows for 15 percent thinner laminates with 66 percent greater strength.
Post-breakage integrity: Maintains structural capacity even when both glass plies are broken.
Open-edge capability: No edge sealing required; resistant to moisture and delamination.
UV and weather resistance: Will not yellow or degrade over time.
High-temperature performance: Effective at temperatures above 50°C.
Explosion-proof, bulletproof, and typhoon-proof capabilities: High safety features for extreme conditions.
Multiple glass and interlayer combinations: Compatible with tempered, heat-strengthened, and annealed glass.

Technical Specifications

Parameter	Specification
Interlayer Type	SentryGlas® (SGP) Ionoplast Interlayer
SGP Thickness Options	0.035 inch (0.89mm), 0.060 inch (1.52mm), 0.090 inch (2.28mm)
Glass Plies	2 or more (multi-layer configurations available)
Total Glass Thickness	6.38mm to 50mm (custom configurations available)
Maximum Panel Size	Up to 3300mm × 6000mm
Glass Types	Float Glass, Tempered Glass (EN 12150), Heat-Strengthened Glass
Glass Colors	Clear, Ultra-Clear Low-Iron, Tinted (Grey, Bronze, Green, Blue, etc.)
Interlayer Colors	Clear, White
Shear Modulus	50x that of PVB
Tear Strength	5x that of PVB
Rigidity	100x that of PVB
Load-Bearing Capacity	2x that of PVB laminated glass
Deflection (vs PVB)	1/4 of PVB laminated glass under equal loads
Ultimate Tensile Strength	34.5 MPa
Post-Breakage Load Capacity	Holds 3300kg load with minimal deflection
Operating Temperature	Effective above 50°C (122°F)
Water Content	<0.2%
Edge Finishing	Flat Polish, Pencil Polish, Beveled Edge
Available Configurations	Laminated, Tempered Laminated, Heat-Strengthened Laminated
Standards Compliance	EN 14449, EN 12150, ASTM E1300, GB 15763.3
Certifications	ISO 9001, CE
Lead Time	10 to 25 days after order confirmation
Packaging	Protective film, edge protectors, interleaving paper, seaworthy wooden crates

Standards and Code Compliance

KINGSTAR BUILDING GLASS SGP Laminated Glass complies with major international building codes and standards:

EN 14449: Glass in building — Laminated glass and laminated safety glass
EN 12150: Thermally toughened soda lime silicate safety glass
ASTM E1300: Standard Practice for Determining Load Resistance of Glass in Buildings
GB 15763.3: Safety glazing materials in building — Part 3: Laminated glass
JGJ 113: Technical specification for application of architectural glass
Shanghai DG/TJ 08-56-2019: Technical standard for building curtain walls

SGP laminated glass is also referenced in IBC (International Building Code) and FBC (Florida Building Code) for safety glazing in hazardous locations, including doors, sidelights, and areas subject to human impact.

Applications

Structural Facades and Curtain Walls:

Point-supported glass facades
Cable-net glass walls
Unitized curtain wall systems
High-rise building exteriors

Frameless Balustrades and Railings:

Cantilevered glass balustrades
Staircase railings
Pool fencing
Rooftop barriers

Glass Canopies and Roofs:

Entrance canopies
Glass roofs and skylights
Atrium glazing
Sloped glazing systems

High-Security Applications:

Hurricane-resistant glazing
Blast-resistant glazing
Bullet-resistant glass
Forced-entry resistant glazing

Structural Glass Elements:

Glass floors and stair treads
Glass bridges
Glass beams

Interior Applications:

Glass partitions and walls
Glass doors
Display cases and showcases

Why Choose KINGSTAR BUILDING GLASS SGP Laminated Glass?

Superior structural performance: Shear modulus 50x PVB, tear strength 5x, rigidity 100x.
Thinner and lighter designs: 15 percent thinner, 66 percent stronger than PVB laminates.
Post-breakage integrity: Maintains structural capacity even when both glass plies are broken; holds 3300kg load after breakage.
Open-edge capability: No edge sealing required; resistant to moisture, UV, and delamination.
Long-term durability: Does not yellow or degrade over time; effective at temperatures above 50°C.
Complete processing capabilities: Tempering, laminating, edge polishing, drilling, and hardware integration under one roof.
Multi-layer configurations: Available for 3 or more glass plies for enhanced performance.
Custom solutions: Custom thicknesses, sizes, interlayer combinations, and edge finishes available.
International standards compliance: EN 14449, EN 12150, ASTM E1300, GB 15763.3 certified.
10 years of industry expertise: With a decade of dedicated experience in architectural glass manufacturing and export, KINGSTAR BUILDING GLASS has delivered SGP laminated glass solutions to projects across North America, Europe, the Middle East, and Southeast Asia.
Quality assurance: Strict quality control from raw material selection to final packaging, ensuring consistent interlayer performance, precise lamination, and reliable processing.

Ready to specify high-performance SGP laminated glass for your next structural or high-security project? Share your requirements with our technical team for custom SGP laminated glass solutions. We will provide interlayer recommendations, structural performance calculations, compliance documentation, and a competitive quote tailored to your project requirements, backed by a decade of glass manufacturing expertise.

Frequently Asked Questions (FAQ)

Q1: What is the difference between SGP laminated glass and PVB laminated glass?
A: SGP (SentryGlas) is an ionoplast interlayer with a shear modulus more than 50 times that of PVB, tear strength 5 times higher, and rigidity 100 times greater. SGP laminated glass has twice the load-bearing capacity, one-quarter the deflection under equal loads, and maintains structural integrity even when both glass plies are broken. SGP also offers superior edge stability, UV resistance, and high-temperature performance, making it the preferred choice for structural and high-security architectural applications.

Q2: Can SGP laminated glass be used in frameless or point-supported applications?
A: Yes. SGP is specifically engineered for minimally supported glass applications such as frameless balustrades, point-supported facades, and glass canopies. Its high stiffness and post-breakage residual strength make it ideal for applications where the glass edges are exposed. Unlike PVB, SGP does not require edge sealing and is resistant to moisture, delamination, and UV degradation.

Q3: What thickness of SGP interlayer is typically used for architectural applications?
A: SGP interlayers are available in standard thicknesses of 0.035 inch (0.89mm), 0.060 inch (1.52mm), and 0.090 inch (2.28mm). The total glass thickness typically ranges from 6.38mm to 50mm depending on the application. For hurricane-resistant glazing, configurations such as 8mm + 1.52mm SGP + 8mm are commonly specified. Custom configurations are available upon request.

Laminated glass (LG) is a type of safety glass that holds together when shattered. In the event of breaking, it is held in place by a thin polymer interlayer, typically of polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), lonoplast polymers, cast in place (CIP) liquid resin, or thermoplastic polyurethane (TPU), between its two or more layers of glass.The interlayer, made through heat and pressure, keeps the layers of glass bonded even when broken, and its high strength prevents the glass from breaking up into large sharp pieces. This produces a characteristic 'spider web' cracking pattern when the impact is not enough to completely pierce the glass.

Extremely high safety

The PVB interlayer withstands penetration from impact. Even if the glass cracks, splinters will adhere to the interlayer and not scatter. In comparison with other kinds of glass, laminated glass has much higher strength to resist shock, burglary, burst and bullets.

Energy-saving building materials

PVB interlayer impedes the transmission of solar heat and reduces cooling loads.

Create aesthetic sense to buildings

Laminated glass with a tinted interlayer will beautify the buildings and harmonize their appearances with surrounding views which meet the demand of architects.

Sound control

PVB interlayer is an effective absorber of sound.

Ultraviolet screening

The interlayer filters out ultraviolet rays and prevents the furniture and curtains from fading effects.

Total thickness: 6.38-17.52mm. Max. size：For architecture 96' x 236' (2438mm x 6000mm). PVB Colors

Milky White

French Green

Light Blue

Bronze

Light Grey

Dark Grey

Ocean Blue etc.

PVB Thickness

0.38mm, 0.76mm, 1.14mm, 1.52mm

Laminated glass is used for architecture, glazing, automobile safety, photovoltaic, UV protection, and artistic expression. The most common use of laminated glass is skylight glazing and automobile windshields. In geographical areas requiring hurricane-resistant construction, laminated glass is often used in exterior storefronts, curtain walls, and windows.