In specialties grades, such as decorative laminates, Aspen hardwood BCTMP pulps with the highest brightness have been used to enhance bulk and surface smoothness. A grade of Eucalyptus BCTMP has been used as a part hardwood kraft substitute, to maximize bulk and opacity in grades such as book papers. Bleached Eucalyptus Kraft Pulp (BEKP)

Both im-mature and overmature woods are unsuitable for rayon grade pulp in as much as the yield and quality of pulp produced is poor (1). The method used in Aus-tralia consists essentially of an acid preheydrolysis, followed by a normal sulphate cook.

grade pulp to tailor made grades of dissolving pulp, based on a wide range of viscosity and purity. The designed products present superior reactivity, due to their morphological and chemical attributes.

Rayon-grade dissolving pulp serves as a raw material for producing fabrics, wet wipes, cosmetic masks, and cellophane. The specialty-grade dissolving pulp, beyond its use in the textile industry, also features in the production of medications, food, and cosmetics. We are a global leader in dissolving pulp production.

Productions of Dissolving grade pulps call for special attention and technical expertise from raw material selection, to the final stages of bleaching of pulps/viscose and rayon manufacture. Basically dissolving grade pulping is a chemical concept of obtaining cellulose in its purest form from wood or any cellulose material.

2024年1月10日 · Loureiro et al. upgraded oxygen-delignified (ODL) paper-grade eucalyptus kraft pulp into dissolving pulp, without the use of a pre-hydrolysis step before kraft pulping. Various xylanases were used in combination with lytic polysaccharide monooxygenases (LPMO), a relatively recently discovered class of enzymes, to increase pulp purity.

2021年12月1日 · Specific properties of dissolving pulps to produce rayon fibres are summarized. Drawbacks of the conventional viscose process are highlighted. Commercialized direct dissolution lyocell process has limitations. Greener approaches include ionic liquids and deep eutectic solvents. Chemical recycling of textile fibres is a challenging research topic.

In Bahia, Bracell manufactures two basic types of special cellulose: dissolving pulp (rayon-grades) and special specialty cellulose (specialty-grades) and produces and sells bleached short-fiber eucalyptus pulp in São Paulo.

2021年4月28日 · Dissolving pulp can be manufactured from a variety of lignocellulosic materials, including both hardwood and softwood. Eucalyptus was selected as the raw material for the Case calculations of the thesis, due to its global availability and …

dissolving pulp quality parameters like viscosity and brightness. Also, in case the mill is converted from the existing paper grade to dissolving pulp, the short sequence is an attractive solution because of optimized energy consumption and low chemical costs. The simplest sequences are ZQ-P or ZD-P. Flexible bleaching sequences. The bleaching ...