The requirements for cellulose fibers according to PANK 2000 have been divided into obligatory and recommended ones as follows:
• Obligatory requirements
• Water content according to PANK 3103: < 8.0% (m/m),
• Instantaneous heat resistance (mass loss) according to PANK 3104: < 7.0% (m/m)
• Recommended values for bulk fibers
• Bulk density according to PANK 3105: 20-35 g/dm3
• Homogeneity according to PANK 3107: 2.0-2.8%
• Fibers’ length distribution:
— 80% value: 1.2-1.9 mm
— 50% value: 0.5-0.9 mm
• Specific surface area according to PANK 2401: 2.0-3.0 m2/g
