This part of GB/T 8944 particularly specifies the method for determination of dryness of pulps baled in sheet form and pulps (such as flash-dried pulps) baled in slabs and calculation of saleable mass of pulps in lots.
This part is applicable to various pulps baled in sheet form and pumps baled in slabs. This part is applicable to a majority of paper pulps with 200kg for each bale and composed of 4~6 identical pulps of similar thickness. This part is also applicable to pulp bale easy of lamination even though it is not composed of pump lump. This method is not applicable in the case that the rubbing action in drilling hole heats the drilling equipment significantly, for example, this phenomenon may occur to some tough chemical pulp or semi-chemical pulp.
This part is not applicable to unitized bales.
2 Terms and Definitions
For the purpose of this part, the following terms and definitions apply.
2.1 Lot
The total number of bales of the same sort of pulp of specific characteristics. The number of bales comprising a lot is indicated by the invoice or by contract between the Parties.
A lot of bales of pulp is said to be “with specification” if it is accompanied by a certificate of origin stating for each bale either:
- Its gross mass (2.2) and its absolute dryness (2.4); or
- Its saleable mass (2.7).
2.2 Gross mass
The total mass of a bale, a part of a lot or a lot comprising: contents, wrappers (pulp or paper) and packaging wires or strappings.
2.3 Oven-dry mass
The mass obtained on drying pulp at 105℃±2℃ until constant mass is reached.
2.4 Absolute dryness
The ratio of the oven-dry mass (2.3) of the pulp to its initial mass, expressed as a percentage.
2.5 Air-dry mass
The mass of the pulp when its moisture content is in equilibrium with the ambient atmosphere.
2.6 Theoretical commercial dryness
A conventional equilibrium value of 88% or 90% according to the country and/or commercial agreements. If the air dryness is 90%, the pulp contains 90 Parts by mass of absolutely dry fibres and 10 Parts by mass of water. For an air dryness of 88%, the corresponding figures are 88 and 12.
