The overlay paper is a crucial component in the manufacturing of various products, particularly in the production of flooring. This thin sheet, weighing between 20-50 g/m2, is made from pure cellulose, which gives it its unique properties. One of the most notable characteristics of overlay paper is its transparency after impregnation, allowing the decor paper to shine through.

When it comes to flooring, durability is paramount. As a result, overlay paper for this purpose often contains a hard pigment such as corundum. The addition of corundum enhances the surface’s resistance to abrasion, ensuring that the flooring can withstand heavy foot traffic without sustaining damage. Additionally, this hard pigment also helps to reduce slipperiness, making the flooring safer for individuals walking on it.

Several specific requirements must be met when producing overlay paper. Firstly, it must have high uniform porosity, meaning that the paper’s pores are evenly distributed throughout its surface. This ensures that the impregnation process is effective and that the appearance of the decor paper is not compromised.

Furthermore, overlay paper must exhibit reasonably good formation, meaning that it has a uniform and consistent structure. This is essential to ensure that the paper maintains its integrity during the manufacturing process and does not tear or become distorted. Additionally, cleanliness is crucial, as any impurities or foreign particles could negatively impact the appearance and quality of the final product.

Lastly, overlay paper must possess excellent light resistance. This means it must be able to withstand prolonged exposure to sunlight without fading or deteriorating. This is particularly important for flooring materials, as they are often placed in areas where they are exposed to natural light.

To meet these stringent requirements, overlay paper is made from well-delignified pulp. Delignification is the process of removing lignin, a compound that gives wood its strength and rigidity but can also cause discoloration and degrade paper quality. By using well-delignified pulp, overlay paper manufacturers can ensure that the final product meets the desired standards of transparency, durability, and light resistance.

In conclusion, overlay paper is a vital component in the production of various products, especially flooring. Its transparency and ability to showcase the decor paper make it an ideal choice for enhancing the aesthetic appeal of flooring materials. Additionally, the addition of hard pigments like corundum improves the durability and slip resistance of the surface. To meet the demanding requirements of overlay paper, it is made from well-delignified pulp, ensuring high uniform porosity, good formation, cleanliness, and light resistance.