Achieving both quality and stable operation in film transport! Discharge static electricity with conductive coating! Prevents film waviness, wrinkles, and scratches.
This is a technical case study of conductive antistatic coatings for metal transport rolls (such as guide rolls and pass rolls) used in the converting and manufacturing processes of various plastic films, optical sheets, and packaging materials. The coating is applied with a uniform film thickness on the outer circumference of the roll, fundamentally eliminating static electricity issues that arise during high-speed transport. **Main Improvement Effects from Implementation** ■ Suppression of Adhesion and Stabilization of Transport A reliable grounding path (conductivity) is provided on the roll surface. By preventing the accumulation of static electricity and quickly dissipating charges, issues such as film pulling, wandering, wrinkles, and slipping during transport are proactively prevented. ■ Prevention of Static Marks and Dust Adhesion It prevents appearance scratches (static marks) on the film surface caused by static electricity discharge and the attraction of fine dust and particles from the surroundings. This directly contributes to improving the quality and yield of optical films and electronic component sheets in clean rooms. ■ Suppression of Aggressiveness to Counter Materials (Scratch Prevention) In addition to antistatic functionality, a coating film is formed that combines appropriate surface smoothness and hardness. This alleviates friction stress with the film, preventing scratches and abrasions on delicate product surfaces.
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【Construction Technology】Contracted Conductive (Static Prevention) Coating for Metal Rolls 【Functional Characteristics and Technical Features】 ■ Material selection based on application and conditions Choose specifications from fluoropolymer-based or PEEK resin-based materials according to desired functions that coexist with static prevention performance, such as non-stick and wear resistance. ■ High conductivity (static prevention function) Quickly dissipates static electricity generated during high-speed sliding and peeling, completely suppressing charging. ■ Optimized surface smoothness and moderate hardness Prevents scratching and abrasion of the counterpart material (such as film) due to low friction characteristics. ■ Baked-on application Uniform film thickness baked onto the entire outer surface of the roll. 【Target Substrates and Applicable Parts】 ■ Various metal rolls (stainless steel, steel, aluminum, etc.) ■ Transport guide rolls, pass rolls, drive rolls, damper rolls, nip rolls. 【Application Support】 ■ In addition to coating new rolls, we also flexibly respond to the stripping of coatings and re-coating (recoat) of used rolls.
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**Main Applicable Uses and Fields** ■ Optical and Electronic Materials Field Optical films for liquid crystals, sheets for touch panels, PET/TAC film transport lines ■ Converting and Secondary Processing Field Various guide rolls for high-performance films, laminating, coating, and slitting processes ■ Packaging and Printing Field Conveyor rolls for plastic films, paper, metal foils, and various rotating sliding parts **Problem-Solving Case Study** ■ Issue During high-speed transport, static electricity caused the film to stick to the roll, leading to frequent wandering and wrinkles. Additionally, there were many product defects due to discharge marks (static marks) and foreign matter adhesion, and surface scratches caused by rubbing against the roll were also a concern. ■ After Implementation Conductive static prevention coating was applied to the outer circumferential surface of the metal transport roll. ■ Effects and Results - Static electricity was quickly removed, resolving the wandering and wrinkles caused by sticking, stabilizing high-speed continuous transport. - Discharge marks and dust entrapment were significantly reduced, improving yield. - Adequate smoothness prevented scratching issues on the delicate film surface.
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Nikken Coating Industry Co., Ltd. has been a specialized manufacturer of functional coatings for contract processing, earning the trust of customers across various industries for 79 years since its founding. We leverage our processing technology to maximize the properties of fluororesins, such as non-stick, lubricity, and chemical resistance, providing high-performance coatings that directly address customer challenges, including "Thermo Pro Release" for thermal welding processes and "NonStick STC" for blades and precision molds. In recent years, in response to movements regarding regulations on fluorinated compounds (PFAS), "PEEK resin," which is gaining attention as a substitute for fluororesins, has become a focus. Nikken Coating Industry commercialized the world's first PEEK resin coating, "PEEKCOAT," in 1999. Based on the solid knowledge and know-how accumulated over more than 20 years, we are further intensifying our research and development efforts to explore the potential of next-generation PEEK coatings! We aim to be recognized as "the go-to for PEEK coatings" and will continue to lead the way. As "the best partner for functional coatings that builds trust through technology," Nikken Coating Industry will continue to contribute to the creation of high-quality, high-performance products.
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