Advanced SGP Laminated Glass for Facades

Enhanced Strength

LYD GLASS only uses A-grade float glass to produce SGP Laminaed glass,SGP laminated glass is a laminated glass with SGP film sandwiched between two glass sheets. SGP is an ion polymer film. Compared to PVB, SGP has twice the load-bearing capacity at the same thickness, one-fourth of the bending deflection, and five times the tear strength. SGP interlayer film is colorless and transparent with good UV resistance. It is less likely to turn yellow after prolonged exposure to sunlight than PVB (yellowing coefficient <1.5 versus 6-12 for PVB).

• Superior Safety

  SGP (SentryGlas®) laminated glass provides superior safety performance compared to traditional PVB laminated glass, thanks to its advanced properties and construction. Here are the key aspects:

  Enhanced Impact Resistance

  Higher Shear Strength: SGP’s ionomer interlayer has significantly greater shear strength, making the laminated glass more resistant to high-impact forces such as blasts, impacts, or accidental strikes.

  Reduced Risk of Shattering: While all laminated glass holds shattered fragments in place, SGP’s superior load-bearing capacity and impact resistance minimize the likelihood of glass breakage under force.

  Post-Breakage Resilience

  Greater Structural Integrity: If the glass does break, SGP retains more of its original strength, meaning the broken pane still holds together longer, providing increased safety and security.

  Enhanced Safety for Occupants: The glass remains intact within the interlayer, reducing the risk of flying shards and debris, which are common hazards with non-laminated or PVB laminated glass.

  Delamination Resistance

  Superior Edge Stability: SGP demonstrates outstanding resistance to delamination caused by environmental factors like moisture, temperature cycles, or UV exposure. This stability ensures the laminated glass maintains its safety performance over time.

  Long-Term Durability: The durability prevents deterioration that could compromise safety in the long run.

  Security Against Forced Entry and Threats

  Enhanced Security: SGP’s high strength and bonding capacity make it difficult for intruders to breach the glazing, offering increased protection against forced entry and vandalism.

  Environmental Impact & Long-Term Safety

  Resilience in Harsh Conditions: Its excellent environmental resistance (UV, moisture, temperature variations) ensures that safety features are maintained throughout the product’s lifespan.

  Design for Safety Applications

  Structural Safety in Architecture: SGP laminated glass is ideal for safety-critical applications such as façades, skylights, balustrades, and curtain walls, where safety and impact resistance are paramount.

  Safety in Hazard Zones: Suitable for areas prone to natural disasters or vandalism, providing added safety margins.

  In Conclusion

  SGP laminated glass offers superior safety by delivering exceptional impact resistance, retaining integrity after breakage, resisting delamination, and providing enhanced security. Its innovative properties ensure that occupants and assets are better protected in a variety of challenging conditions, making it an excellent choice for applications demanding the highest safety standards.

• Excellent Thermal Stability

  SGP (SentryGlas®) laminated glass boasts significantly improved stability compared to standard PVB laminated glass. This increased stability manifests in several key performance areas:

  Shear Strength & Load Bearing

  Higher Shear Modulus: SGP has a much higher shear modulus than PVB. This is the key differentiator. Think of it as SGP's greater resistance to deformation under shear forces.

  Reduced Deflection: This higher shear modulus translates to significantly less deflection (bending) under load. This means SGP laminated glass can support heavier loads, making it ideal for overhead applications like canopies and skylights.

  Post-Breakage Performance: Even if the glass breaks, SGP retains a greater capacity to hold the broken glass together, resisting disintegration and maintaining structural integrity. This is critical for safety.

  Edge Stability & Resistance to Delamination

  Superior Edge Seal: SGP has exceptional edge stability, reducing the risk of delamination (separation of the glass and interlayer) due to environmental factors like moisture or temperature fluctuations.

  Long-term Durability: This stability translates to longer-term durability and performance, especially in outdoor applications.

  Temperature Stability

  Reduced Creep: SGP exhibits significantly less creep (slow deformation under constant load) at higher temperatures compared to PVB. This means that it maintains its shape and structural integrity better over the long term, even when exposed to sustained heat.

  Wider Operating Temperature Range: SGP laminated glass can often withstand a broader range of temperatures, and the risk of degradation is lesser.

  Resistance to Environmental Effects

  Moisture Resistance: SGP is known for its superior moisture and UV resistance. It resists degradation and maintains its optical clarity and bonding even when exposed to harsh environmental conditions.

  UV Stability: SGP is more resistant to UV degradation (yellowing, clouding) making it ideal for applications with exposure to sunlight.

  Structural Design Advantages

  Reduced Glass Thickness: Due to its strength and stability, SGP can allow for the use of thinner glass panes than would be required with PVB to achieve the same load-bearing capacity. This can lead to weight and cost savings.

  Larger Spans & Simplified Framing: The strength and stability of SGP allow for larger glazed areas and designs with fewer supports, creating more open and aesthetically pleasing designs.

  In summary, SGP laminated glass offers superior stability properties compared to PVB in the following ways:

  
  Higher shear strength and load-bearing capacity.
  Reduced deflection under load.
  Exceptional edge stability and resistance to delamination.
  Enhanced temperature stability and reduced creep.
  Superior resistance to moisture, UV and other environmental factors.
  Greater capacity to retain post-breakage integrity.

  These features make SGP a premium choice for applications where safety, structural performance, durability, and design flexibility are paramount, particularly in demanding architectural glazing applications. It's important to remember that while SGP provides performance benefits, it does come at a higher cost compared to PVB.

• Production Process

  Glass Preparation

  Similarities: The process begins with selecting and preparing the glass panes. This involves:
  Choosing the appropriate glass type (annealed, heat-strengthened, tempered).
  Cutting the glass to the desired dimensions.
  Thoroughly washing and cleaning the glass to ensure a pristine surface for bonding.
  Inspecting for defects.

  Consideration for SGP: Because SGP has a greater strength, rigidity and stability, the glass used is more likely to be tempered or heat-strengthened, to maximize the performance benefits of the SGP.

  Interlayer Preparation

  SGP Interlayer: The key difference lies in the interlayer material itself: SGP (SentryGlas®) is an ionomer interlayer. It delivers higher structural performance, greater clarity, and improved edge stability.

  Cutting the SGP Interlayer: SGP is cut precisely to match the size and shape of the glass panes. Automated cutting machines are used.

  Storage: SGP interlayers are usually stored in a controlled climate to prevent moisture absorption, which is crucial for consistent bonding. This is often a highly controlled aspect of the production.

  Assembly

  Layup: The washed and dried glass panes are placed on the assembly table.

  Interlayer Placement: The SGP interlayer is precisely placed between the glass panes. It's important to position it accurately to avoid any air pockets or misalignments.

  Air Removal (Pre-Lamination - Option and Important): Because SGP is less able to "flow" than PVB, it's very important for optimal bonding to start with a good air evacuation. This can be done via a heated roller process or a vacuum ring process, as with PVB. But the requirements for SGP are usually more precise than with PVB.

  Lamination (The Key Difference: The Autoclave Process)

  Autoclave Process is Essential: SGP requires an autoclave process for full bonding.

  Controlled Heating: The assembled "sandwich" of glass and SGP is placed in the autoclave, which precisely manages temperature, pressure, and time. The temperature is typically around 130-150°C, and the pressure often matches.

  Higher Temperatures & Precise Control: SGP typically needs slightly higher temperatures than PVB to properly bond, but the exact parameters are specific to the SGP product. A precise control of temperature ramps and soak times is important for this product.

  Pressure & Time: The pressure and duration of the autoclave cycle are key to achieve the desired bond strength. The high strength of the ionomer interlayer material leads to a much stronger final product.

  Air Evacuation: Again, air evacuation is critical for a clear and perfect bond.

  Considerations for Autoclave Parameters: The specific temperature, pressure, and cycle time are crucial, and vary depending on the SGP type being used, the glass type, and the desired properties of the finished product. Precise adherence to manufacturer's specifications is vital.

  Inspection and Quality Control

  Thorough Inspection: Post-lamination, the glass undergoes exhaustive inspection for any defects like bubbles, delamination, or optical imperfections.

  Testing: Samples may be subject to rigorous testing to ensure they meet specific performance standards, including: Impact resistance / Optical clarity / Delamination resistance / Shear resistance

  SGP Specific Qualities: Testing will often emphasize SGP's superior shear strength and impact resistance, especially when compared to PVB laminated glass.

  Trimming and Finishing

  Edge Treatment: The edges might undergo trimming or sealing, removing excess interlayer material if necessary.

  Packaging and Shipping

  Careful Handling: The robust final product requires equally safe handling.

  Protective Packaging: The laminated glass is carefully packaged (often in crates or with edge protection spacers) to prevent damage during transport.

  Key Differences and Considerations for SGP Lamination (vs PVB)

  SGP Interlayer Properties: That it is a more rigid, stronger interlayer.

  Autoclave Precision: The specific temperature, pressure, and cycle time are even more crucial in SGP lamination as compared to PVB, so parameters are meticulously managed.

  Glass Type: SGP laminated glass often uses tempered glass in applications to maximize its performance attributes.

  Edge Stability: SGP offers superior edge stability, which helps resist delamination.

  Shear Strength: The high shear strength of SGP allows for more effective resistance to impact and greater design freedom.

  Cost: SGP interlayers tend to be more expensive than PVB.

  In conclusion, laminating with SentryGlas® (SGP) is a more demanding process that highlights the material's distinct properties and superior strength. It demands precision, a high-quality infrastructure, and strict adherence to manufacturing process standards. The final product brings an unmatched combination of glass performance that delivers safety, security, long-term optical clarity, and overall structural strength.