04 April 2025 -
Coating via doctor blade in textile finishing
At Finipur, we specialise in textile finishing and offer various techniques to accurately apply coatings onto textiles and other substrates. A commonly used method in our industry is the direct application technique using a doctoring system. This technique offers many advantages, such as versatility, precision and control over the thickness and properties of the coating layer. Coating via a doctor blade is done by spreading the liquid coating over the tightly stretched fabric or textile using a doctor blade or knife. The coating thickness is determined by the distance between the blade and the fabric, while the blade can be adjusted at different angles and profiles to optimise coverage. In this article, we discuss the doctoring systems we use at Finipur and how they contribute to high-quality results in textile finishing.
What is doctor blade coating ?
The air doctor blade or air knife uses air to apply the coating to the substrate in a controlled manner. This doctoring system offers a high degree of precision, because it can adjust the pressure and distance between the blade and the substrate. This adjustment of the blade allows us to guarantee consistent layer thickness, which is particularly crucial for applications requiring uniform properties over the entire surface of the substrate.
Advantages of the air doctor blade:
- Highly suitable for fine coatings.
- Ideal for materials with a uniform texture.
- Flexible settings to vary layer thickness.
The air doctor blade is often used for textiles that have a delicate surface and where a controlled, thin coating is desired.
What is a tabletop knife coater ?
The tabletop doctor blade is a more traditional technique, where the doctor blade rests directly on the textile surface. This system provides greater contact with the material and is ideal for applications requiring a more robust coating layer.
Benefits of the table doctor blade:
- Suitable for thicker coatings.
- Applicable to a wide range of textile types.
- Precise control over the blade angle and height.
With the table doctor blade, we can apply both pastes and foams, making this technique versatile for various industrial applications.
Compounds for knifecoating : paste and foam form
At Finipur, we can apply coatings with our doctoring systems in both paste form and foam form. This provides customers with the ability to tailor the finish to the specific needs of their product.
- Paste form: Often used for applications where a solid, smooth finish is desired.
- Foam form: Ideal for lighter, breathable coatings.
The choice of compound and application technique is tailored to the desired properties of the final product, such as water repellence, wear resistance or breathability.
Would you like to learn more about our capabilities or discuss a project? Feel free to contact us. At Finipur, we are ready to turn your ideas into reality.
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