Hey there! As a supplier of PE release film, I often get asked about how to improve the printing adhesion on this type of film. It's a common challenge, but with the right approach, it can be tackled effectively. In this blog, I'm gonna share some tips and tricks that I've learned over the years to help you get better printing adhesion on PE release film.
First off, let's understand a bit about PE release film. It's widely used in various industries like labels, tapes, and packaging because of its good release properties. But these very properties that make it great for releasing can sometimes be a headache when it comes to printing. The smooth and low - energy surface of PE release film doesn't easily hold ink, which is the root cause of poor adhesion issues.
Surface Treatment
One of the most effective ways to improve printing adhesion is through surface treatment. There are a few methods you can try.
Corona Treatment
Corona treatment is a popular option. It works by using a high - voltage electrical discharge to modify the surface of the PE release film. This discharge breaks the molecular bonds on the film's surface, creating free radicals. These free radicals then react with oxygen in the air to form polar functional groups. These polar groups increase the surface energy of the film, making it more receptive to ink.
I've seen many customers who've had great results with corona treatment. It's a relatively simple process that can be done in - house if you have the right equipment. Just make sure to adjust the treatment intensity according to the type of PE release film you're using. If the treatment is too weak, it won't have much effect on adhesion. On the other hand, if it's too strong, it can damage the film.
Flame Treatment
Flame treatment is another option. It involves passing the PE release film through a flame. The heat from the flame oxidizes the surface of the film, increasing its surface energy. Flame treatment is a bit more aggressive than corona treatment, but it can be very effective for some types of PE films. However, it requires careful control to avoid over - heating the film, which can cause warping or other damage.
Ink Selection
The type of ink you use also plays a crucial role in printing adhesion. Not all inks are created equal when it comes to working with PE release film.
UV - Curable Inks
UV - curable inks are a great choice. They cure quickly when exposed to ultraviolet light, which means they can form a strong bond with the film's surface. These inks also have good chemical resistance and durability. They're available in a wide range of colors and can be used for both simple and complex printing jobs.
Solvent - Based Inks
Solvent - based inks can also work well on PE release film. They contain solvents that help the ink spread and adhere to the surface. However, they do have some drawbacks. The solvents can be harmful to the environment, and they also require proper ventilation during the printing process.
When choosing an ink, make sure to test it on a small sample of your PE release film first. This will help you determine if it has good adhesion and if it meets your quality requirements.
Printing Conditions
The conditions under which you print can also affect adhesion.
Temperature and Humidity
Temperature and humidity can have a big impact on ink drying and adhesion. Generally, a moderate temperature and humidity level are ideal. If it's too hot and dry, the ink may dry too quickly, which can lead to poor adhesion. On the other hand, if it's too cold and humid, the ink may not dry properly.
Printing Pressure
The pressure applied during printing is also important. If the pressure is too low, the ink may not make good contact with the film's surface, resulting in poor adhesion. If the pressure is too high, it can damage the film. You need to find the right balance for your specific printing setup.
Using Primers
Primers are another tool in your arsenal for improving printing adhesion. A primer is a thin layer of material that you apply to the PE release film before printing. It acts as a bonding agent between the film and the ink.
There are different types of primers available, and you need to choose one that's compatible with your PE release film and the ink you're using. Some primers are designed to improve the surface energy of the film, while others are formulated to react chemically with the ink.
Applying a primer can be a bit more work, but it can really make a difference in the quality of your printed products. Just make sure to follow the manufacturer's instructions when applying the primer to ensure the best results.
Our Product Range
At our company, we offer a variety of PE release films that are suitable for different printing applications. We have Release Liner With High Release Force, which is great for applications where a strong release force is required. Our Silicone Oil Release Film has excellent release properties and can also be treated for better printing adhesion. And if you're looking for something more specialized, our Fluorin Release Film offers unique performance characteristics.
If you're facing challenges with printing adhesion on PE release film, don't hesitate to reach out to us. We have a team of experts who can help you find the right solutions for your specific needs. Whether it's recommending the best surface treatment method, the right ink, or the most suitable primer, we're here to assist you.
In conclusion, improving printing adhesion on PE release film is a multi - step process that involves surface treatment, ink selection, controlling printing conditions, and potentially using primers. By following these tips, you can achieve better results and produce high - quality printed products.
If you're interested in our PE release films or need more advice on printing adhesion, feel free to contact us for a purchase negotiation. We're looking forward to working with you!
References
- "Plastic Films: Technology and Packaging Applications" by O. P. Gupta
- "Printing Technology: Principles and Practices" by John C. Dair