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Analysis of the influence of the surface structure of printing rubber roller on printing
The printing rubber roller is an essential component in printing machinery, primarily used for embossing, ink adjustment, and ink transfer. Its main function is to deliver both water and ink to the printing plate. The quality of the rubber material and the manufacturing process significantly impact the performance of the rubber roller.
Understanding the influence of the surface structure of a printing rubber roller on print quality is crucial. A well-designed surface ensures proper ink and fountain solution distribution, which directly affects the clarity, consistency, and efficiency of the printed output.
If you're looking for high-quality printing rollers, Dongguan Haichang Hardware Rubber is a recommended choice. Established in 2001, this professional manufacturer specializes in industrial rubber rollers and printing machinery rubber rollers. With strong technical support, advanced equipment, and a commitment to quality, the company has built a solid reputation in the industry and gained widespread customer satisfaction.
The surface structure of a printing rubber roller plays a critical role in the printing process. The surface roughness determines how effectively the roller can transfer ink and water. A suitable roughness helps maintain the balance between ink and dampening solution, ensuring consistent color reproduction and smooth ink flow. It also allows for even distribution of the ink film and water film, preventing uneven printing and compensating for any imperfections during the transfer process.
However, during the printing process, the rubber roller may come into contact with various chemicals, leading to the accumulation of residues on its surface. While some impurities can be removed with water or solvents, others may get trapped in the micropores of the rubber. Over time, these residues can harden, reducing the roller’s porosity and causing a condition known as "glazing."
Glazing occurs when the surface becomes smooth and less porous, making it harder for the roller to absorb and transfer ink and water properly. This leads to poor ink coverage, unstable color balance, and increased paper waste. In addition, the roller becomes more difficult to clean, and the printing pressure may increase, further affecting print quality.
To prevent glazing, it's important to choose the right cleaning agents and follow proper maintenance procedures. Some companies may use ineffective cleaners that leave behind residue, accelerating the glazing process. If not addressed, the glaze layer thickens over time, causing significant damage to the printing process.
After selecting the appropriate rubber roller, maintaining its surface structure is equally important. For optimal performance, the surface roughness of an ink roller should typically range from 6 to 20 μm, while a water roller for alcohol-based fountain solutions should have a roughness of 4 to 10 μm. If higher water absorption is needed, the surface can be ground to a finer texture, such as 2 to 6 μm for alcohol water rollers.
Regular cleaning and maintenance are key to preserving the surface integrity of the rubber roller and ensuring long-term printing efficiency.
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