Centre d’actualités

In terms of composition, sulfur-free paper is a special kind of paper that does not contain sulfides or any sulfur-containing compounds. It is usually made from wood pulp or other cellulose materials. Tracing paper, on the other hand, is a semi-transparent paper, and its specific composition is relatively complex, which endows it with some unique properties.

High-quality kraft paper typically displays a natural, soft beige or light brown color with even distribution and no noticeable color differences or spots.  Excessively pale paper may indicate over-bleaching, which weakens durability, while uneven coloring or dark/yellow spots suggest production flaws.

Sulfur-free protective paper has emerged as a game-changer in electronics manufacturing, particularly for printed circuit boards (PCBs) and LED components. Traditional protective materials often contain sulfur compounds, which react with copper and silver traces on PCBs, leading to corrosion and electrical failures. Sulfur-free paper eliminates this risk by using alternative chemical formulations, ensuring long-term reliability for sensitive electronics412.

Kraft paper is a durable, tan-colored paper made from wood fibers of coniferous trees. The process involves breaking wood into pulp, beating it to strengthen fiber bonds, adding sizing and dyes, and forming sheets on a papermaking machine. Named for its tan color and cowhide-like toughness, it's widely used in packaging,envelope paper, adhesive sealing paper, asphalt paper, cable protection paper, insulating paper, and more.

Kraft paper adopts sulphate method of pulping (Kraft Process), with coniferous wood pulp as the main raw material, the fibre length up to 2-3 mm, lignin retention is more, so the texture is tough and tear-resistant. Unbleached kraft paper has a natural brownish-yellow colour, i.e. ‘brown kraft paper’, while bleached kraft paper is ‘white kraft paper’, and both types of kraft paper have high strength.

Parce que le papier journal est différent du carton SBS et de certains papiers d’impression, il n’est pas couché, est plus volumineux que le carton après blanchiment, a beaucoup de porosité sur la surface et a une mouillabilité plus forte, etc., ce qui est important dans l’utilisation de l’encre. Les aspects liés à l’application et au revêtement doivent être pris en compte de manière globale. Par exemple, sur la base de l’analyse des caractéristiques du papier journal papier d’impression, une certaine impression flexo est bonne, mais il n’est pas approprié d’utiliser une presse à imprimer pour l’impression pleine page sur papier journal sur site. Parce que la surface du papier journal est rugueuse, que le matériau est doux et qu’il a une forte absorption d’encre, la couleur de l’imprimé est terne et l’impression entraînera également l’arrachage de l’encre aux fibres de papier (également appelées peluches de papier).