This standard specifies the test method for hydroscopicity of towel product.
This standard is applicable to various woven towel products with textile fibre as raw material.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 6529 Textiles - Standard Atmospheres for Conditioning and Testing (GB/T 6529-2008, ISO 139:2005, MOD)
GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgment of Limiting Values
GB/T 8629 Textiles - Domestic Washing and Drying Procedures for Textile Testing (GB/T 8629-2001, eqv ISO 6330:2000)
3 Principles
3.1 Method A - sedimentation method: the sample is washed in water, dried and conditioned, and then time required for the sample to be completely wetted and begins to sink since it contacts the water surface is determined.
3.2 Method B - absorption method: the sample is washed in water, dried and conditioned, a certain amount of water flows through the sample within a specified period of time under the standard conditions, and then the percentage of water absorbed by the sample and the original water amount is determined.
4 Apparatuses and Materials
4.1 Automatic washing machine: Type A washing machine meeting the requirements of GB/T 8629 -- load in front door, horizontal roller.
Note: Other instruments which have been proven to be capable of obtaining the same test results may also be used.
4.2 Rotary tumble dryer: tumble dryer meeting the requirements of GB/T 8629 and used together with Type A washing machine.
