Standard Test Methods of Sampling and Testing Pulps to be Used in the Manufacture of Electrical Insulation

Importancia y uso:

8.1 The conductivity of the water extract of electrical grade pulp results from electrolytic impurities in the pulp potentially present as ionizable acids, bases, salts, or a combination of these. The presence of electrolytic impurities in electrical insulation is undesirable as they tend to lower insulation resistance and have corrosion-producing tendencies under conditions of applied potential. When comparing test data, note that the extract conductivity of pulps, especially those of high purity, changes with time after manufacturing in some instances. This test is useful for routine acceptance testing, the comparison of different pulps, and research work.6

Subcomité:

D09.01

Referida por:

D0202-23, D3376-18R25

Volúmen:

10.02

Número ICS:

85.040 (Pulps)

Palabras clave:

air resistance ash analysis; ash content; apparent density; bulk characteristics; bursting strength; cellulose; cellulosic fiber; conductivity; dirt; disintegration; extractable acidity-alkalinity; extractable chlorides; fiber analysis; fiber length of pulp; folding endurance; freeness (Canadian Standard Freeness); handsheet characteristics; handsheet machine; Kappa/Permanganate number; moisture; pentosan content; pH; pulps; shive count; solvent soluble matter; tensile strength; water ;