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KINGSTAR GLASS

Laminated Tempered Glass | High-Strength Safety Glass with Post-Breakage Integrity from KINGSTAR BUILDING GLASS

KINGSTAR BUILDING GLASS Laminated Tempered Glass is a premium safety glass product manufactured by bonding two or more plies of fully tempered glass with a polymer interlayer—typically polyvinyl butyral (PVB) or ionoplast (SGP)—under controlled heat and pressure. This construction combines the high impact resistance and mechanical strength of tempered glass with the post-breakage integrity of laminated glass. In the event of breakage, glass fragments remain adhered to the interlayer rather than

Product Detail

What is Laminated Tempered Glass?

Laminated tempered glass is a safety glass product that combines two distinct technologies: tempering and lamination.

Tempered Glass (Toughened Glass): Each individual glass ply is thermally tempered through a heating and rapid cooling process, which gives it approximately four to five times the strength of annealed glass. Tempered glass is designed to shatter into small, relatively harmless fragments upon breakage.

Laminated Glass: Two or more glass plies are bonded together with a polymer interlayer (PVB, SGP, or EVA) under heat and pressure. When broken, glass fragments adhere to the interlayer rather than falling free.

Laminated Tempered Glass combines both technologies: tempered glass plies are used as the substrate for lamination. The result is a product that offers the impact resistance of tempered glass and the post-breakage integrity of laminated glass.

Laminated Tempered Glass vs. Tempered Glass Only

Feature	Laminated Tempered Glass	Tempered Glass Only
Strength	High (tempered plies)	High (tempered)
Post-Breakage Behavior	Fragments adhere to interlayer; barrier remains	Shatters into small fragments; barrier disappears
Building Code Status	Structurally adequate under all installation conditions	Acceptable only where no walking surface below glass exists
UV Protection	Yes (interlayer blocks up to 99% UV)	No
Acoustic Insulation	Yes (interlayer dampens sound)	No
Security	High (multiple bonded layers)	Moderate
Typical Applications	Structural facades, balustrades, canopies, skylights	Shower doors, tabletops, side windows

Manufacturing Process

The manufacturing of laminated tempered glass follows a specific sequence:

Each glass ply is cut to the required size.
Holes, notches, and edge work are completed on each ply.
Each ply is thermally tempered (EN 12150).
The tempered plies are cleaned and inspected.
The interlayer (PVB, SGP, or EVA) is placed between the plies.
The assembly is laminated under heat and pressure in an autoclave .
The finished laminated tempered glass panel is inspected.

All cutting, drilling, edge work, and tempering must be completed before lamination. Once laminated, no further fabrication is possible.

Interlayer Options

Interlayer Type	Thickness Options	Key Characteristics	Best For
PVB (Polyvinyl Butyral)	0.38mm, 0.76mm, 1.14mm, 1.52mm	Standard safety interlayer, good UV protection, acoustic performance	General architectural safety applications
SGP (Ionoplast / SentryGlas)	0.76mm, 0.89mm, 1.52mm	5x stiffer than PVB, higher load capacity, superior edge strength	Structural applications, frameless systems, high wind loads
EVA (Ethylene Vinyl Acetate)	0.38mm and multiples	Good for decorative and curved applications	Decorative glass, curved glass

When specifying laminated glass that uses tempered glass plies, a minimum interlayer thickness of 1.52mm (0.060 inch) is recommended to accommodate surface irregularities caused by the tempering process.

Key Features

High mechanical strength: Tempered glass plies provide increased resistance to impact and loading.
Post-breakage integrity: Broken fragments remain attached to the interlayer, reducing the risk of falling glass.
UV protection: Interlayers block up to 99% of UV radiation, protecting interiors from fading.
Acoustic insulation: The interlayer dampens sound transmission.
Thermal resistance: Suitable for environments exposed to temperature variations.
Enhanced security: Multiple bonded layers improve resistance to penetration.
Long-term durability: Designed for demanding exterior and structural applications.

Technical Specifications

Parameter	Specification
Glass Type	Fully Tempered Glass (EN 12150) or Heat-Strengthened Glass
Glass Plies	2 or more plies
Individual Ply Thickness	3mm to 19mm
Total Thickness	6.38mm to 50mm (custom configurations available)
Standard Combinations	4+4 (8.38mm), 5+5 (10.38mm), 6+6 (12.76mm), 8+8 (16.76mm)
Interlayer	PVB (0.38mm multiples), SGP (0.76mm, 0.89mm, 1.52mm), EVA
Maximum Panel Size	Up to 3300mm × 6000mm
Glass Colors	Clear, Ultra-Clear Low-Iron, Tinted (Grey, Bronze, Green, Blue, etc.)
Interlayer Colors	Clear, White, Colored (Vanceva system)
Edge Finishing	Flat Polish, Pencil Polish, Beveled Edge
Available Configurations	Laminated Tempered, Laminated Heat-Strengthened
Processing Options (Before Tempering)	Cutting, Edge Grinding, Drilling, Notching
Processing Options (After Lamination)	None (no further fabrication possible)
Standards Compliance	EN 14449:2005, EN 12150-1:2015+A1:2019, ANSI Z97.1-2015, CPSC 16 CFR 1201 Cat II, ASTM C1172
Certifications	ISO 9001, CE
Lead Time	10 to 25 days after order confirmation and drawing approval
Packaging	Protective film, edge protectors, interleaving paper, seaworthy wooden crates

Standards and Code Compliance

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

European Standards:

EN 14449:2005/AC:2005: Laminated glass and laminated safety glass — Evaluation of conformity/Product standard
EN 12150-1:2015+A1:2019: Thermally toughened soda lime silicate safety glass
EN 12600: Pendulum test — Impact test method and classification

US Standards:

ANSI Z97.1-2015 Class A: Safety glazing materials used in buildings
CPSC 16 CFR 1201 Category II: Safety standard for architectural glazing materials
ASTM C1172: Standard Specification for Laminated Architectural Flat Glass
ASTM E2353: Standard Test Methods for Glass Railing Systems and Components

IBC (International Building Code) Requirements:
Laminated tempered and laminated heat-strengthened glazing are the only types considered by the code to be structurally adequate under all conditions of installation. Single-layer tempered glass is acceptable only under limited applications where there is no walking surface below the glass, or where the walking surface below is permanently protected from the risk of falling glass.

Glass used in guards and handrails must comply with CPSC 16 CFR 1201 Cat II or ANSI Z97.1-2015 Class A and be permanently marked as safety glazing.

Applications

Exterior Architectural Applications:

Structural glass facades and curtain walls
Frameless glass balustrades and railings
Glass canopies and entrance covers
Skylights and overhead glazing
Atrium glazing and glass roofs
Point-supported glazing systems

Interior Architectural Applications:

Glass partitions and room dividers
Glass doors and entrances
Staircase balustrades (internal and external)
Shower enclosures and bathroom screens

High-Security Applications:

Hurricane-resistant glazing
Blast-resistant glazing
Security windows and doors
Banks, jewelry stores, and high-security facilities

Commercial and Public Spaces:

Hotel and hospitality venues
Shopping centers and retail stores
Office buildings and corporate headquarters
Schools and educational facilities
Sports facilities and gymnasiums

Why Choose KINGSTAR BUILDING GLASS Laminated Tempered Glass?

Superior safety: Combines the impact resistance of tempered glass with the post-breakage integrity of laminated glass.
Code compliant: Meets EN 14449, EN 12150, ANSI Z97.1, CPSC 16 CFR 1201 Cat II, and IBC requirements .
Multiple interlayer options: PVB, SGP, and EVA available for different performance requirements.
Complete processing: Cutting, tempering, laminating, edge polishing, drilling, and hardware integration under one roof.
Custom configurations: Custom thicknesses, sizes, and interlayer combinations available.
10 years of industry expertise: With a decade of dedicated experience in glass manufacturing and export, KINGSTAR BUILDING GLASS has delivered laminated tempered 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-strength laminated tempered glass for your next structural or safety-critical project? Share your requirements with our technical team for custom laminated tempered 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 laminated tempered glass and tempered glass alone?
A: Tempered glass alone is a single ply of glass that has been heat-treated for strength. Upon breakage, it shatters into small fragments and the barrier disappears completely. Laminated tempered glass uses two or more tempered glass plies bonded with an interlayer. When broken, fragments adhere to the interlayer and the panel stays in place, maintaining the barrier function. The IBC considers laminated tempered glass structurally adequate under all installation conditions, whereas tempered glass alone is only acceptable in limited applications.

Q2: What thickness combinations are available for laminated tempered glass?
A: KINGSTAR BUILDING GLASS offers laminated tempered glass in various standard and custom configurations. Standard combinations include 4+4 (8.38mm), 5+5 (10.38mm), 6+6 (12.76mm), 8+8 (16.76mm), and custom multi-layer structures. Individual ply thicknesses range from 3mm to 19mm. Interlayer thicknesses include PVB at 0.38mm multiples, SGP at 0.76mm, 0.89mm, and 1.52mm, and EVA at 0.38mm multiples.

Q3: Can laminated tempered glass be cut or drilled after lamination?
A: No. All cutting, drilling, edge work, and tempering must be completed before the lamination process. Once the glass plies are bonded with the interlayer under heat and pressure, no further fabrication is possible without damaging the interlayer and compromising the structural integrity of the panel. This is why all specifications—including dimensions, hole positions, edge finishes, and interlayer type—must be provided before production begins.

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.