PVB Laminated Glass ndash Advanced Safety Glass with PVB Interlayer for Enhanced Performance and Protection

​​PVB Laminated Glass – Technical Specifications & Application Guide​​

PVB (Polyvinyl Butyral) laminated glass is an engineered safety glass consisting of two or more glass plies bonded with a tough PVB interlayer, creating a composite material that maintains integrity when broken. This construction provides unique performance characteristics for security, acoustic control, and UV protection.

​​Material Composition & Structure​​

1. ​​Standard Construction:​​

   • 2 x 3mm annealed glass + 0.38mm PVB = 6.38mm total thickness

   • Available configurations up to 12mm glass + 2.28mm PVB per layer

2. ​​PVB Interlayer Variants:​​

   • ​​Standard Clear:​​ 0.38mm, 0.76mm, 1.52mm thicknesses

   • ​​Acoustic PVB:​​ STC improvement up to 5dB vs standard

   • ​​Colored PVB:​​ 20+ color options (RGB values available)

   • ​​Structural PVB:​​ High-modulus (SentryGlas®)

3. ​​Glass Compatibility:​​

   • Float, tempered, heat-strengthened, Low-E coated

   • Can combine with patterned/tinted glass

​​Mechanical Performance Data​​

​​Optical & Environmental Properties​​

1. ​​Light Transmission:​​

   • Clear PVB: 89-91% of base glass VLT

   • Tinted PVB: 15-80% VLT depending on color

2. ​​UV Blocking:​​

   • 99.5% UV rejection (<380nm)

   • Prevents interior fading (ISO 18909)

3. ​​Temperature Range:​​

   • Service: -40°C to +80°C continuous

   • Peak: 120°C for 2 hours (SentryGlas®)

​​Specialized Performance Grades​​

1. ​​Security Glazing:​​

   • EN 356 P5A (Manual attack resistance)

   • ASTM F1233 (Ballistic resistance)

2. ​​Hurricane Resistance:​​

   • Passes TAS 201/202 impact tests

   • Miami-Dade County approved

3. ​​Acoustic Performance:​​

   • STC ratings:

     • 6mm: STC 35

     • 10mm: STC 42

     • 12mm + acoustic PVB: STC 48

​​Manufacturing Process Overview​​

1. ​​Glass Preparation:​​

   • Cutting to size (±1mm tolerance)

   • Edge polishing (arrissé edges)

2. ​​PVB Layup:​​

   • Clean room environment (Class 1000)

   • 0.5mm overlap on all sides

3. ​​Autoclave Process:​​

   • 135-150°C at 12-15 bar pressure

   • 2-4 hour cycle time

   • Vacuum bag pre-press stage

​​Global Standards Compliance​​

• ​​Europe:​​ EN 14449, BS 6206

• ​​USA:​​ ASTM C1172, ANSI Z97.1

• ​​Asia:​​ GB 15763.3, JIS R3205

• ​​International:​​ ISO 12543

​​Leading Interlayer Manufacturers​​

1. ​​Eastman Chemical (Saflex®)​​

   • Standard & acoustic PVB

   • Color stable to ΔE<3 after 10 years

2. ​​DuPont (SentryGlas®)​​

   • 5x stiffer than standard PVB

   • For structural applications

3. ​​Kuraray (Trosifol®)​​

   • Ultra-clear PVB (haze <0.5%)

   • SC series for security glazing

4. ​​Everlam (Evasaif®)​​

   • High UV-stable formulations

   • Recycled content options

​​Design Considerations​​

1. ​​Edge Treatment:​​

   • Minimum 10mm bite for framing

   • Silicone edge seals recommended

2. ​​Structural Calculations:​​

   • Reduced allowable stress vs monolithic:

     • Annealed: 20% reduction

     • Tempered: 15% reduction

3. ​​Compatibility:​​

   • Avoid direct contact with:

     • PVC frames

     • Certain sealants (test required)

​​Sustainability Features​​

• ​​Recyclable:​​ Glass/PVB separation possible

• ​​Low VOC:​​ <50μg/m³ emissions

• ​​Cradle-to-Cradle:​​ Gold certified options

• ​​Embodied Carbon:​​ 15-20kg CO₂/m²

​​Failure Modes & Prevention​​

1. ​​Delamination:​​

   • Causes: Moisture ingress, poor autoclaving

   • Prevention: Proper edge sealing

2. ​​PVB Discoloration:​​

   • Causes: UV exposure, heat

   • Prevention: Use UV-stable formulations

3. ​​Edge Cracking:​​

   • Causes: Thermal stress

   • Prevention: Adequate edge deletion

​​Industry Applications​​

1. ​​Automotive:​​

   • Windshields (AS1/AS2 optical quality)

   • Sunroofs (5% VLT solar control)

2. ​​Architecture:​​

   • Skylights (EN 13024 compliant)

   • Glass floors (EN 357 load ratings)

3. ​​Security:​​

   • Bank teller windows (UL 972)

   • Blast-resistant facades (ISO 16933)

​​Performance Testing Services​​

1. ​​Impact Testing:​​

   • 45kg bag drop (EN 12600)

   • Air rifle tests (EN 1063)

2. ​​Environmental Tests:​​

   • 1000hr humidity cycling (85°C/85%RH)

   • UV exposure (ISO 4892-2)

3. ​​Structural Tests:​​

   • 4-point bending (ASTM C158)

   • Shear modulus (ISO 6721)

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