Laminated Glass Properties
CGIM LLC is an experienced laminated glass fabricator and laminated glass supplier serving industrial, military, commercial, and specialty markets. Our custom laminated glass is engineered to stay intact upon impact, bonding two or more layers of glass with a durable polymer interlayer to provide unmatched safety, security, and performance in demanding environments.
What Is Laminated Glass?
Laminated glass is a type of safety glass composed of two or more panes permanently bonded together by a thermoplastic interlayer, typically polyvinyl butyral (PVB), SentryGlas® Plus (SGP), or ethylene vinyl acetate (EVA). The layers are fused under heat and pressure, creating a single, unified pane that resists penetration and shattering.
When laminated glass breaks, the interlayer holds glass fragments in place rather than allowing dangerous shards to scatter. This is a critical safety property for high-risk industrial, military, and architectural applications.
Laminated Glass Interlayer Types
The performance characteristics of laminated glass are largely determined by the interlayer material used. CGIM LLC works with the following interlayer types to meet the specific demands of each project:
| Interlayer | Material | Best For |
|---|---|---|
| PVB | Polyvinyl Butyral | General safety glass, sound insulation, UV filtering, cost-effective applications |
| SGP | SentryGlas® Plus (Ionoplast) | Structural applications, blast resistance, overhead glazing, high-load environments |
| EVA | Ethylene Vinyl Acetate | Decorative glass, moisture-prone environments, photovoltaic panels |
PVB is the most widely used interlayer due to its optical clarity, flexibility, and adhesion properties. SGP offers twice the load-bearing capacity and five times the tear resistance compared to PVB, making it the preferred choice for security and blast-resistant applications.
Laminated Glass Fabrication Process
Our laminated glass fabrication begins with selecting the appropriate glass substrate and interlayer for your application. The process includes:
- Material Selection – Choosing annealed, heat-strengthened, or tempered glass substrates based on structural requirements
- Assembly – Stacking glass layers with the interlayer film between them under controlled conditions
- Pre-Pressing – Passing the assembly through nip rollers or a vacuum bag to remove air and create an initial bond
- Autoclave Processing – Applying heat (~275°F) and pressure to fully cure and permanently bond the interlayer
- Custom Fabrication – Cutting, edgework, drilling, CNC machining, and polishing to your exact specifications
While plastic interlayers can make post-lamination cutting challenging, CGIM LLC’s advanced fabrication capabilities ensure precise processing across a broad range of custom dimensions and configurations.
Laminated Glass Applications
Laminated glass is widely specified wherever impact resistance, safety compliance, or security performance is required. Common laminated glass applications served by CGIM LLC include:
- Blast-Resistant Windshields and Shields – Engineered to absorb and dissipate explosive force while maintaining structural integrity
- Armored Vehicle Glass – Multi-layer configurations for military and law enforcement vehicles
- Machining Equipment Viewing Windows – Safety-rated viewing panels for CNC equipment and industrial machinery
- Overhead Glazing and Skylights – Prevents dangerous shard fallout in the event of breakage
- Security Enclosures – Banks, government buildings, and high-security facilities
- Hurricane and Storm-Resistant Windows – Meets wind-borne debris impact requirements
- Chemical and Petroleum Processing Windows – Water-pressure-resistant glass for harsh process environments
- Ballistic-Resistant Panels – Custom multi-ply glass configurations for protection-rated applications
Industries Served
CGIM LLC supplies custom laminated glass to a wide range of industries, including:
- Military and Defense
- Automotive and Transportation
- Chemical and Petroleum Processing
- Metals, Steel, and Mining
- Industrial and Process Equipment Manufacturing
- Medical Equipment
- Architecture and Commercial Construction
- OEM Equipment Manufacturers
Custom Laminated Glass Fabrication Capabilities
As a full-service laminated glass supplier and fabricator, CGIM LLC offers end-to-end processing in house, from lamination through final finishing. Our capabilities include:
- Custom sizing and cutting
- Edge polishing and finishing
- CNC machining and drilling
- Waterjet cutting for complex shapes
- Tempering and heat strengthening of substrate glass
- Prototype and single-piece orders
- Short-run and high-volume production
All fabrication is completed at our facility, enabling tighter quality control and faster turnaround than multi-vendor supply chains.
Laminated Glass Properties and Benefits
Laminated glass features include:
- High safety performance – Holds together when shattered; reduces injury risk
- Blast and impact resistance – Absorbs force; ideal for security and military use
- Sound insulation – PVB interlayer dampens acoustic transmission
- UV radiation blocking – Filters up to 99% of ultraviolet light
- Sun filtering – Reduces solar heat gain without sacrificing visibility
- Water and pressure resistance – Suitable for harsh industrial environments
- Security – Remains in frame after breakage, delaying or deterring forced entry
Laminated Glass vs. Tempered Glass
| Feature | Laminated Glass | Tempered Glass |
|---|---|---|
| Break Behavior | Holds together; fragments stay bonded to interlayer | Shatters into small blunt pieces |
| Safety | Higher – no loose shards | High – small cubes are less dangerous |
| Security | Superior – remains in frame after impact | Lower – can be fully penetrated after initial break |
| Sound Reduction | Better (PVB interlayer dampens noise) | Minimal |
| UV Filtering | Yes (up to 99%) | Minimal |
| Post-Fabrication Cutting | Possible with expertise | Not possible after tempering |
| Best For | Blast resistance, security, overhead glazing | Doors, shower enclosures, side windows |
Laminated Glass FAQs
What is laminated glass used for?
Laminated glass is used in applications where safety, security, or impact resistance are critical. Common uses include blast-resistant windshields, armored vehicle glass, machining equipment viewing windows, security glazing, hurricane-resistant windows, skylights, and overhead architectural glazing.
What is the difference between laminated glass and tempered glass?
Laminated glass bonds multiple glass panes with a polymer interlayer, keeping the glass intact when broken. Tempered glass is a single thermally treated pane that shatters into small cubes. Laminated glass offers superior security and UV filtering; tempered glass is stronger under impact but cannot be cut post-production.
What interlayers are used in laminated glass fabrication?
The three most common interlayers are PVB (polyvinyl butyral), SGP (SentryGlas® Plus ionoplast), and EVA (ethylene vinyl acetate). PVB is the most widely used for general safety and acoustic applications. SGP provides greater rigidity and strength for structural and blast-resistant uses. EVA is preferred for decorative and moisture-exposed applications.
Can laminated glass be custom cut and fabricated?
Yes. CGIM LLC offers full custom laminated glass fabrication including cutting, drilling, CNC machining, waterjet cutting, edge polishing, and finishing. Our in-house capabilities allow us to meet custom dimensions, shapes, and tolerances for both prototype and production orders.
Is laminated glass the same as safety glass?
Laminated glass is one type of safety glass. It qualifies as safety glass because it holds together when shattered rather than breaking into dangerous shards. Tempered glass is another type of safety glass, though it behaves differently upon breakage.
What industries use laminated glass?
Industries that commonly specify laminated glass include military and defense, automotive and transportation, chemical and petroleum processing, metals and mining, industrial equipment manufacturing, medical equipment, and architecture. CGIM LLC serves both OEM manufacturers and MRO operations across these sectors.
How thick can laminated glass be?
Laminated glass thickness depends on the number of glass plies and interlayer thickness used. Standard configurations begin at approximately 6mm (two plies of 3mm glass with a 0.38mm PVB interlayer), and multi-ply configurations for blast or ballistic applications can reach 25mm or more. Contact CGIM LLC to discuss thickness requirements for your specific application.
Why is cutting laminated glass challenging?
The polymer interlayer in laminated glass, particularly PVB, can interfere with blades and tools during cutting. This requires specialized equipment, scoring techniques, and expertise to cleanly separate layers without delamination. CGIM LLC’s fabrication team is experienced in precision laminated glass cutting and processing.