Standard Preparation
International laboratory procedures for the preparation of pulp suspensions ensure that fibers are fully separated without changing their physical properties. The iso 5263 wet disintegration standard uses a mechanical agitator and a specific volume of water to break up dry sheets or moist pulp samples. It creates a uniform slurry for subsequent testing of freeness or sheet formation.
This method does not include the removal of impurities or the bleaching of the fibers.
Suspension Quality
Standardized agitation prevents the accidental cutting of fibers while ensuring that no bundles or knots remain in the mixture. During the iso 5263 wet disintegration process, a defined number of revolutions is applied to the propeller to achieve a repeatable state of dispersion. This consistency is required for comparing different batches of pulp across different laboratories.
The water used must be at a specific temperature to avoid altering the swelling of the cellulose. It is the fundamental first step for all physical testing of paper pulp.
Testing Reliability
Proper disintegration ensures that subsequent physical tests yield accurate data. Failure to follow this procedure leads to false readings in tear and tensile strength. Every certified paper laboratory adheres to this protocol for its daily quality checks.
