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Polyvinyl butyral interlayer is a thin film of uniform thickness that has been processed and extruded from PVB resin mixed with plasticizer and additives. Its unique characteristics are: impact resistance, penetration resistance, sound insulating, and UV-proof. Moreover, PVB film can hold the debris from shattered glasses to protect the end users. Currently, most automotive windshields are required to adopt PVB laminated glass. PVB films are also used for the glass on high-rises and landmark architectures.
Polyvinyl Butyral Interlayer (PVB Film): Properties and Applications
Table 1: Key Properties of PVB Interlayer Film
| Property | Typical Value | Importance |
|---|---|---|
| Thickness Range | 0.38-1.52 mm | Determines impact resistance and optical clarity |
| Light Transmittance | >90% | Critical for architectural and automotive glass |
| Tensile Strength | 20-30 MPa | Ensures structural integrity under stress |
| Elastic Modulus | 1-2 GPa | Provides flexibility for impact absorption |
| Adhesion Strength | 10-20 N/cm | Maintains glass bonding during breakage |
| Operating Temperature | -20°C to 60°C | Suitable for most environmental conditions |
Table 2: Primary Applications of PVB Film
| Industry | Application | Key Benefit |
|---|---|---|
| Automotive | Windshields and windows | Safety glass that holds fragments when broken |
| Construction | Architectural glass | UV protection and sound insulation |
| Photovoltaic | Solar panel encapsulation | Durability and optical clarity |
| Defense | Bullet-resistant glass | Multiple layers provide ballistic protection |
| Display | Touch screen protection | Scratch resistance and impact absorption |
Table 3: Comparison with Alternative Interlayer Materials
| Material | Advantages | Disadvantages |
|---|---|---|
| PVB | Excellent adhesion, proven safety record | Moisture sensitive, requires careful storage |
| EVA (Ethylene Vinyl Acetate) | Lower processing temperature | Lower impact resistance |
| TPU (Thermoplastic Polyurethane) | High flexibility and tear strength | Higher cost, optical clarity issues |
| Ionoplast | Better moisture resistance | Less flexible, higher processing temperature |
Table 4: Manufacturing Parameters for PVB Film
| Parameter | Typical Value | Importance |
|---|---|---|
| Extrusion Temperature | 180-220°C | Ensures proper flow and homogeneity |
| Plasticizer Content | 25-30% | Controls flexibility and adhesion |
| Drying Conditions | 60°C, <1% RH | Prevents moisture absorption |
| Lamination Pressure | 10-15 bar | Ensures bubble-free bonding |
| Lamination Temperature | 120-150°C | Activates adhesion properties |
Table 5: Safety and Performance Standards
| Standard | Application | Requirement |
|---|---|---|
| ANSI Z97.1 | Architectural glass | Impact resistance |
| FMVSS 205 | Automotive glass | Penetration resistance |
| EN 12600 | Building glass | Impact performance |
| UL 752 | Bullet-resistant | Ballistic protection levels |
| IEC 61215 | Solar modules | PV durability requirements |
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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