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60-micron opaque green PE silicone coated release film is a type of release liner that is mainly used in the production of
adhesive products such as tapes, labels, and other types of coated materials.
Some of the most common applications of 60-micron opaque green PE silicone coated release film include:
1. Label Industry:
The release liner is widely used in the label industry as a backing material for self-adhesive labels for various applications such as food
and beverage labeling, packaging, and industrial labeling. The green color of the film provides visual appeal and differentiation.
2. Graphics Industry:
The release liner is used in the graphics industry for creating vinyl graphics, cut lettering, and decals.
The green color of the film enables the user to easily identify the liner from the adhesive side.
3. Electrical and Electronic Industry:
The release liner is used in the electrical and electronic industry to create protective tapes and insulating materials.
The thickness and rigidity of the film enable it to handle the stress placed on it during the manufacturing and application process.
4. Medical Industry:
The release liner is used in the medical industry to produce wound dressings and other advanced wound care products.
5. Automotive Industry:
The release liner is used in the automotive industry to create double-sided tapes for attaching body trims, molding, and other automotive parts.
In summary, 60 micron opaque green PE silicone coated release film is commonly used in applications that require a medium-thin and flexible release liner. The green color of the film provides visual appeal and helps in product differentiation.
Coating silicone on the surface of PE film involves a multi-step process that includes the following:
1. Preparation of the film:
The first step is to prepare the surface of the PE film to ensure good adhesion of the silicone coating. The film may need to be cleaned and
treated with corona discharge or plasma to enhance its surface energy.
2. Application of silicone:
The silicone can be applied to the surface of the film using a wide range of methods, including spraying, dipping, or roll coating.
A silicone solution is prepared with a specific level of viscosity and concentration so it can be applied evenly to the film.
3. Curing of silicone:
Once the silicone has been applied to the film, it needs time to cure. Most commonly curing is done at a high temperature, typically above
120°C to allow uniform curing for better curing as well as adhesion to the PE substrate.
4. Trimming or die-cutting:
After the coating is cured, the coated PE film is trimmed to the correct size or cut into the desired shape using specialized equipment.
| 1 | Appearance | No air bubbles / stains / breakage / impurities | Measured data (Ref.) | |
| 2 | Size | Width (mm) | 960 ± 5 | 962 |
| Thickness (mm) | 0.060 ± 0.005 | 0.061 | ||
| 3 | Max. Tension (N / 50mm) | TD | ≥ 30 | 84 |
| MD | ≥ 30 | 104 | ||
| 4 | Color | White | Colorimeter △E＜ 3 | ok |
| 5 | Elongation @ break (%) | TD | ≥ 150 | 926 |
| MD | ≥ 200 | 799 | ||
| 6 | Surface Tension (Corona treatment) | Dyne Value | ≥42 dyne for each side | |
| 7 | Release Force (gf/25mm 20min.Finat 10) | Inner | 5-10 | 8 |
| Outer | 20-30 | 26 | ||
| 8 | Subsequent Adhesion (%) | Inner | ≥85 | 90 |
| Outer | ≥85 | 92 | ||
| 9 | Winding direction | Customized | - | |
| 10 | Splice No. | ≤1 | - | |
UV curing method is becoming increasingly popular for silicone coating on PE film in recent years. The UV curing method involves the use of
UV light to initiate a chemical reaction in the silicone, which then causes it to cure and crosslink. In contrast to the heat curing method, the UV-
curing process uses light waves in the ultraviolet spectrum rather than heat.
There are some advantages to using UV curing as a method to cure silicone on PE film:
1. Faster curing time:
The UV curing method is generally faster than the heat curing method and can often cure the silicone coating in just a few seconds.
2. Energy-efficient and eco-friendly:
Since UV curing does not require high heat temperatures, it is a more energy-efficient process and has a lower carbon footprint which
makes it an eco-friendly option.
3. High-quality coating:
UV curing results in a uniform and high-quality silicone coating with excellent adhesion and chemical resistance.
4. Lesser production time:
Compared to heat curing, the UV curing process can save time, resulting in faster production times.
5. No heat damage:
UV curing on PE film does not result in any heat damage, which ensures that the substrate's properties remain intact in the production process.
The specified stripping ratio of both sides of PE film can be controlled by regulating the coating weight of the silicone coating on each side of the
film. The stripping ratio is defined as the force required to remove the silicone-coated release liner from an adhesive and is expressed numerically
as a ratio.
Here are some steps to control the specified release ratio of both sides of PE film:
1. Determine the required release ratio:
The first step is to determine the desired release ratio for each side of the PE film. This will depend on the specific application requirements.
2. Adjust the coating weight of each side:
The next step is to adjust the coating weight of the silicone on each side of the PE film.
The coating weight will determine the thickness of the silicone coating and, therefore, the release ratio.
3. Conduct testing:
Once the coating weight has been adjusted, the release ratio needs to be tested on each side of the PE film.
The use of a tensile tester or a release force tester can help measure the force required to remove the silicone coated release liner from
the adhesive.
4. Adjust coating weight as needed:
If the release ratio does not meet the specified requirements, the coating weight on each side of the PE film needs to be adjusted accordingly.
This adjustment process may need to be repeated until the desired release ratio is achieved.
It is essential to establish a clear plan or coating process parameter to control the symmetrical release ratio.
This process involves finding the optimal settings for silicone wetting and adhesion on simple process setup steps.
The amount of silicone coating applied, the temperature used, as well as the solvent system used can all be regulated to control the specified
release level or release ratio of both sides of PE film.
