Basic Process Requirements for Vacuum Lamination
1. Substrate Pretreatment: Perform degreasing, dust removal and dehumidification on the surface of the substrate prior to lamination to ensure a clean and impurity-free bonding interface.
2. Ambient Temperature Control: Maintain the operating ambient temperature above 10℃ to guarantee the lamination activity of Optical Clear Adhesive (OCA).
3. OCA Storage and Application: Store OCA optical adhesive films in a light-proof and sealed condition, following the first-in first-out principle to minimize performance degradation.
4. Process Validation: For special profiled substrates, conduct preliminary lamination process validation tests. After confirming compatibility, carry out mass production using the TIPTOP vacuum laminating machine.
Technical Key Points for Vacuum Lamination Defoaming
1. Clean Environment Control: Implement the lamination process in a cleanroom with Class 10,000 or higher cleanliness level to strictly control dust-induced microbubble sources.
2. Equipment Precision Assurance: Adopt high-precision vacuum laminating equipment to improve lamination uniformity and compactness.
3. Process Parameter Optimization: Precisely calibrate key process parameters of the laminating machine, including pressure, speed and lamination angle.
4. OCA Cutting Specification: During the cutting and die-cutting of optical adhesives and explosion-proof films, apply a vertical placement process to avoid deformation-induced bubbles.
5. Enhanced Defoaming Treatment: Utilize the TIPTOP defoaming machine equipped with a heating-pressurization combined defoaming process to thoroughly eliminate microbubbles generated during lamination.
6. Roller Lamination Control: During mechanical roller lamination, strictly control the flatness of PC/PMMA substrates to prevent local gap-induced bubbles.
7. Temperature-Controlled Lamination: Adopt a temperature-controlled lamination mode with simultaneous heating to enhance adhesive fluidity and exhaust efficiency.
