Pulp production and characterisation

Benefit description

Pulp production The following preparatory tests are performed Log chipping and chip sorting Steam Explosion treatment Obtaining chemical, semi-chemical or mechanical pulp (disc desfibrator). Pulping of pulp in pulper Pulp deinking Pulp refining in disc refiner, PFI (UNE-EN ISO 2564-2), Lampen mill (UNE 57024) or Valley beater (UNE 57017) Bleaching with oxygen, dioxide, peroxide or hydrosulfite. Disintegration of pulp in laboratory (UNE-EN ISO 5263) Formation of test sheets (UNE-EN ISO 5269) Characterization of cellulose pulp The following analyses are performed: Pulp moisture (UNE-EN ISO 638) pH of aqueous extracts. Cold extraction (UNE-ISO 6588-1). pH of aqueous extracts. Hot extraction (UNE-ISO 6588-2). Determination of draining. Schopper-Riegler method (UNE-EN ISO 5267-1). Determination of rejects in Somerville (TAPPI 242) Fiber classification (Baüer-McNett) (UNE 57118) Kappa Number (UNE-ISO 302) Viscosity and degree of polymerization (UNE 57039-1) Determination of alkali resistance (UNE 57052)