ASTM D3376 : 14

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

Standard Details

1.1 These test methods cover the sampling and testing of cellulosic pulps for use in the manufacture of electrical insulating papers and boards or in the direct application of pulp fibers as insulation to electrical conductors.

Note 1: The significance of any one pulp property test method, as set forth herein, should be considered with discretion depending on the product made from the pulp.

1.2 Sections on Reagents, Sampling, and Report are integral parts of each of the individual test methods that follow.

1.3 Each test method is described as being a measure of either a bulk property of the pulp or a property of a handsheet formed from the pulp.

1.3.1 Bulk characteristics determinable by these procedures appear in the following sections:

Procedure	Sections	ASTM Method Reference	TAPPI Method Reference

Aqueous Extract Conductivity	8 and 9	D202	...
Aqueous Extract pH	10 and 11	D202	...
Aqueous Extractable Acidity-Alkalinity	12 and 13	D202	...
Analysis of Ash for Cations by Atomic Absorption Spectro- photometry	70 – 78	D1193 and D2576	...
Ash Content	79 – 82	D202	T 413
Dirt in Pulp	40 and 41	...	T 213
Fiber Analysis	23 and 24	D202 and D1030	...
Fiber Length of Pulp	42 and 43	...	T 232, T 233
Freeness (Canadian Standard Freeness)	53 and 54	...	T 227
Kappa Number/Permanganate Number (Substances Oxidizable by Permanga- nate)	27 and 28	...	T 236, UM 251
Laboratory Processing of Pulp (Beater Method)	51 and 52	...	T 200
Moisture in Pulp	31 – 33	...	T 210
Neutral Aqueous Extractable Hardness in Pulp	16 – 22	D202, D1126, and D2576	...
Pentosan Content of Pulp	29 and 30	...	T 223
Resistance of Pulp to Disintegration (Standard RPG)	44 – 50	...	T 239, UM 252
Shive Count	34 – 39	...	...
Solvent-Soluble Matter in Pulp	25 and 26	D202	...
Tensile Properties	65 – 69	D202	...
Water-Extractable Chlorides	14 and 15	D202	...

1.3.2 Handsheet characteristics determinable by these procedures appear in the following sections:

Procedure	Section	ASTM Method Reference	TAPPI Method Reference

Air Resistance (Porosity)	57 and 58	D202	T 205
Apparent Density	63 and 64	D202	T 205
Bursting Strength	59 and 60	D202 and D774/D774M	T 205
Folding Endurance (M.I.T.)	51 and 52	D202 and D2176	T 205
Forming Handsheets for Physical Tests of Pulp	55 and 56	...	T 205
Tensile Strength	65 and 66	D202 and D828	T 205

Note 2: Methods for Ash, Silica, selected cations from Ash, Heat Stability, α, β, and γ Cellulose, Viscosity, Total Chlorine, Tear, and Dissipation Factor and Relative Permittivity, will be considered for addition as methods are developed.

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.