Application of gravure water-based ink on PET film
Date: Aug 20 2024 From: Star Color
PET (Polyester Film) film, as a high-performance packaging material, has a wide range of applications in packaging, electronics, electrical insulation and other fields due to its excellent physical properties, chemical properties and dimensional stability. With the increasing awareness of environmental protection, water-based gravure ink, as an environmentally friendly ink, is gradually replacing traditional solvent based ink and becoming an important choice for PET film printing.
Characteristics of water-based gravure ink
The
water-based gravure printing ink is a new type of ink with low toxicity or non-toxic, no irritating taste, non combustible and non explosive. It is mainly composed of nano organic (or inorganic) pigments, water-based acrylic lotion and related additives. Compared to solvent based inks, water-based gravure inks have significant environmental advantages, with no VOC (volatile organic compound) emissions, and are friendly to human health and the environment. Meanwhile, although its drying speed is slightly slower than solvent based inks, optimizing the formula and printing process can effectively improve printing efficiency and quality.
Difficulties in printing PET film with water-based gravure ink:1. Adhesion issue
Surface tension difference: There is a significant difference in surface tension between PET film and water-based ink, which makes it difficult for ink to adsorb on PET film, thereby affecting adhesion.
2. Printing speed
The drying speed of water-based ink is relatively slow, which may cause the ink to be processed in subsequent processes before it is completely dried during the printing process, thereby affecting the printing quality.
3. Ink formula issue
The formula of water-based ink has a significant impact on its adhesion on PET film. The resin, pigment, additives and other components in the ink need to be reasonably matched to ensure that the ink can firmly adhere to the PET film.
Improvement of water-based gravure ink printing PET film:1. Coronation increases adhesion
Water based ink uses water as the connecting material, and the surface tension of water is about 72 dynes, while the surface tension of PET film is about 40 dynes/cm. The tension difference between the two is relatively large, and water-based ink is difficult to directly adhere to PET film. Therefore, it is necessary to perform corona treatment on PET film before printing, usually up to 48 dynes/cm, and water-based ink will have good adhesion.
2. Printing speed
Zhongzhixing water-based gravure ink has been adjusted for printing accuracy, and the ink formula can be adjusted according to user needs, while using some additives to meet printing speed requirements. It can be adjusted from 80 meters per minute to 200 meters per minute.
3. Ink formula issue
Based on the characteristics of PET material, Zhongzhixing's gravure water-based ink uses polyurethane resin as the main raw material, and adjusts the ink formula according to the printing process. Not only does it have good flexibility. It also has good weather resistance in terms of scratch resistance and other aspects.
Advantages of water-based gravure ink on PET filmEnvironmental friendliness: Water based gravure ink does not contain toxic volatile solvents, meets VOCs emission standards, effectively reduces environmental pollution, and ensures the health of operators.
Excellent printing effect: By adjusting the water-based gravure ink formula, it has good adhesion and fastness on PET film, achieving high reproducibility and stable and reliable printing quality. It has excellent printing and surface printing effects, strong composite fastness, and even meets food grade requirements, suitable for high-end fields such as food packaging.
Wear resistance and durability: When PET film is combined with water-based gravure ink, printed products have excellent wear resistance and durability, which can maintain their appearance for a long time and extend the service life of packaging materials.
Wide applicability: In addition to PET film, water-based gravure ink can also be used for composite film, gravure and flexographic printing, exhibiting good adhesion, flexibility and scratch resistance, further expanding its application fields.
Application examplesIn the packaging industry, PET film is widely used in high-end vacuum aluminum plated products, heat shrink packaging, electronic and electrical packaging, and other fields due to its excellent transparency, airtightness, and fragrance retention. Using water-based gravure ink for printing not only meets environmental requirements, but also enhances the visual effect and market competitiveness of packaging products.
For example, in high-end food packaging, PET film packaging printed with water-based gravure ink not only meets food safety standards, but also enhances product appeal through exquisite patterns and text. Meanwhile, the wear resistance and durability of water-based gravure ink also ensure the integrity of the packaging during transportation and storage.
The application of water-based gravure ink on PET film not only conforms to the trend of environmental protection, but also significantly improves the quality and market competitiveness of packaging products. With the continuous advancement of technology and the reduction of costs, the application prospects of water-based gravure ink in the field of PET film printing will be even broader. In the future, the printing industry should continue to increase its research and development efforts in water-based ink technology, and promote its application and promotion in more fields.
Zhongzhixing gravure water-based ink, as a leading environmentally friendly printing material in the industry, stands out in the printing market with its excellent performance and wide applicability. This ink is designed specifically for gravure printing and is not only suitable for high demand substrates such as PET films, but also exhibits significant advantages in color performance, adhesion, drying speed, and environmental friendliness.
Firstly, Zhongzhixing gravure water-based ink has bright colors and high color intensity, which can perfectly reproduce various colors required by customers and meet the needs of high-quality printing. Its color standards strictly follow Pantone color codes to ensure accurate and precise printing, clear layering, and strong three-dimensional effect.
Secondly, the ink has excellent adhesion performance on substrates such as PET film, achieving a strong adhesion effect for both inner and outer printing, with strong composite fastness and durability. This is due to the use of high-quality binders and advanced formulation technology in the ink, which forms a good bonding force between the ink and the substrate, effectively preventing ink from falling off or fading.
Furthermore, the drying speed of Zhongzhixing gravure water-based ink is moderate, and through oven drying, it can improve production efficiency while ensuring printing quality. The ink has excellent leveling performance and transferability, making it less prone to problems such as clogging and sticking during the printing process, reducing the scrap rate, and improving the economic benefits of printing enterprises.
In addition, the ink also has excellent environmental performance. As a water-based ink, it has low VOC emissions and meets international environmental standards and regulatory requirements. Ink itself is harmless to the human body, reducing pollution and harm to the environment and operators during the printing process. At the same time, the ink has been certified by international authorities such as ROHS and FDA, and can be used in sensitive areas such as food packaging to ensure the safety of customers' products.
Zhongzhixing gravure water-based ink occupies an important position in the printing market due to its excellent color performance, strong adhesion, moderate drying speed, and excellent environmental performance. Whether in terms of printing quality, production efficiency, or environmental requirements, it is a reliable high-quality ink product.
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