In the precision Lamination and ACF (Anisotropic Conductive Film) bonding process of Flexible Printed Circuits (FPC), protecting fragile microcircuits and ensuring absolute pressure uniformity under extreme heat and force is crucial for production yield. The High Tear Strength Silicone Pad frequently used by engineers is not a thermal consumable in this process; instead, it serves as an extremely robust Mechanical Buffer capable of resisting high-pressure tearing and eliminating uneven stress.
Physical Principles: Fumed Silica and Pressure Uniformity The resilience of high-tear silicone buffers is built on physical synergy:
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Reinforcing Fillers: Standard silicone easily becomes brittle under high heat and pressure. Lixing optimizes high-tear buffers by introducing nano-scale Fumed Silica. Its massive surface area creates strong physical cross-links with the polysiloxane chains, building a robust 3D network.
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Tear Strength (Ts) Formula: A key metric measuring a material’s resistance to incision propagation: Ts = F / d (Tear Strength = Maximum Force at Tear / Thickness) High tear silicone typically achieves Ts > 40 kN/m. This ensures that when the press head lifts after lamination, the pad resists powerful mechanical pulling forces, remaining structurally intact and enabling zero-residue rework.
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Pressure Distribution Uniformity: Utilizing highly consistent compression characteristics, the silicone pad fills microscopic step-heights on the FPC surface, distributing force evenly to completely eliminate micro-bubbles within the ACF.
Applications: Vacuum Lamination and Flexible Displays Lixing Composite Material offers high-tear gasket solutions with precise CFD and Tear Strength data designed for demanding automated lines:
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OLED & FPC Vacuum Lamination: For Fine Pitch flexible boards, Lixing’s High Tear Strength Silicone Padwithstand severe thermal expansion while providing absolutely stable and uniform pressure, ensuring flawless electrical connections.
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Residue-Free Efficiency: The extreme toughness ensures the material will not powder or break after repeated high-pressure cycles, significantly reducing the time required to clean residue.
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