Hot press equipment used for LCM display bonding or FPC/IC lamination applies direct heat and pressure through a metal platen. If the buffer layer cannot handle the temperature, sticks to the surface, or bleeds oil, the result can be scratched substrates, trapped air bubbles, or an entire batch of failed lamination — all of which hurt line yield and delivery schedules.
To manage buffering, thermal conductivity, and non-stick release together in a high-temperature hot press environment, many LCM and FPC lamination lines use a thin silicone sheet as a process consumable. This silicone-based buffer sheet is engineered for repeated hot pressing cycles while maintaining stable physical and electrical properties.
Material Mechanism: Buffering and Thermal Conductivity Together
Per published specifications, this thin silicone sheet offers high resilience, non-adhesion, high tensile strength, and a powder-free, highly flat surface. High resilience and tensile strength let the material keep buffering through repeated hot press cycles, protecting the platen and component surfaces from direct hard contact. Its non-stick, powder-free surface helps reduce oil bleed and residue transfer onto FPC, IC, glass, and other precision substrates during lamination.
Core Technical Points
- Thermal conductivity: 1.0 to 1.5 W/m-K per the specification table (ASTM D5470), helping distribute heat from the press.
- Temperature range: -40°C to 200°C continuous operating range, with momentary resistance up to -50°C to 340°C (EN 344), covering most LCM and FPC hot press cycles.
- Hardness and density: 60 to 70 Shore A hardness (ASTM D2240) and 1.7 to 2.0 g/cm3 specific gravity (ASTM D792), giving consistent buffering feel.
- Electrical insulation: Withstand voltage of at least 4 KV (ASTM D149), suitable as an insulating buffer layer in the press stack.
- Flame rating: UL 94 V-0/V-1 rated, with a standard thickness starting at 0.26mm; thickness and color can be customized.
Industrial Applications
Per the product page, this sheet is used in LCM display hot press bonding and in semiconductor packaging processes for thermal conduction and temperature regulation, helping protect FPC, IC, glass, and other precision components from scratching and oil bleed during lamination.
Selection Notes
When selecting a grade, distinguish between the continuous operating range (-40°C to 200°C) and the momentary peak rating (-50°C to 340°C) — the momentary figure should not be treated as a continuous-duty rating. Standard thickness is 0.26mm; other thicknesses, colors, and physical properties require confirming customization options with Lixing Compound Material, matched against your press line’s actual temperature and pressure profile.
Conclusion
Hot press yield and precision-component protection both depend on the buffer layer’s thermal, temperature, insulation, and release performance working together. This thin silicone sheet is one buffering material option for LCM and FPC hot press lines; confirm exact specifications against your process requirements.
Tags: #SiliconeSheet #HotPressBuffering #LCMBonding #FPCLamination #ThermalMaterial
