PFA Coating for Ink Pans | Prevents Ink Adhesion & Reduces Color Change Time
Fluororesin coating
【Reduction of cleaning labor for the printing line】Prevents ink adhesion with excellent release properties and liquid repellency! Dramatically shortens the time for color change operations.
This is a technical case of applying a fluororesin PFA coating to a metal "ink pan" used for gravure printing machines, such as those for package printing and film printing, where liquid printing ink is stored. The coating process is uniformly and smoothly applied to the bottom and sides of the ink pan, including the rounded corners and areas near the drain outlet. **Purpose of the Coating** In an environment where printing inks containing various solvents, pigments, and resin components are constantly in contact, the coating provides top-tier "non-stick" properties and "water and oil repellency." It prevents ink stains from adhering, contributing to improved operational efficiency and quality stability in the printing process. **Main Benefits of Implementation** ■ Reduction of setup change time (downtime) Residual ink does not adhere to the surface, allowing for smooth wiping and recovery during frequent color changes. ■ Decrease in cleaning labor and solvent usage To prevent sticking, scrubbing during cleaning is no longer necessary. The amount of cleaning organic solvents (such as thinners) is significantly reduced, achieving cost savings and improving the work environment. ■ Prevention of foreign matter contamination It prevents "skinning" caused by the drying and peeling of inks from previous processes, aiming to enhance product quality and improve yield.
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basic information
【Construction Technology】Contracted Fluororesin Coating (PFA) 【Coating Film Characteristics and Functions】 ■ Extremely high non-stickiness (release property) Prevents adhesion of high-viscosity printing inks. ■ Excellent water and oil repellency Effectively repels inks regardless of whether they are water-based or solvent-based. ■ Outstanding chemical resistance and corrosion resistance Prevents deterioration and corrosion of the coating film caused by various organic solvents and ink additives. ■ Uniform and smooth precision application Covers complex corner R areas and surrounding drainage outlets. 【Target Substrates and Components】 ■ Metal ink pans (ink pans) made of stainless steel (SUS), steel, etc. ■ Ink trays, nozzles, and ink circulation pathway components around gravure printing machines. 【Maintenance System】 ■ Even if the coating film deteriorates after years of use, it can be re-coated by stripping the existing film. The substrate can be reused as is.
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Applications/Examples of results
**Main Application Uses** - Ink trays (ink pans) for gravure and flexo printing machines - Ink supply and recovery lines for package printing, film printing, and building material printing lines - Peripheral components such as ink blending tanks, stirring blades, and drain ports for printing inks **Challenges and Improvement Examples After Implementation** - **Challenges**: Due to the increasing variety and short delivery times, frequent color changes and cleaning tasks were required. Ink would adhere and dry inside the ink pans, making it difficult to remove, necessitating the use of large amounts of organic solvents (thinners) for manual scrubbing, which took considerable time. Additionally, the peeling of dried ink led to contamination issues (skin contamination). - **After Implementation**: PFA coating was applied to the entire interior of the ink pans and contact parts. - **Effects and Achievements**: - The high release effect significantly streamlined the collection and wiping of residual ink during color changes, reducing setup downtime. - The elimination of sticking reduced the amount of cleaning solvent used, achieving both a reduction in labor burden and a decrease in running costs. - The complete eradication of "skin" troubles caused by adhered ink stabilized printing quality.
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Company information
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.
