GB/T 6503-2017 Man-made fibres - Test method of moisture regain
1 Scope
This standard specifies the test methods for moisture regain of man-made fibres, i.e. oven weighting and cold weighting.
This standard is applicable to man-made fibres.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4146 (all parts) Textiles - Man-made fibers
GB/T 6502 Sampling method of man-made filament yarns
GB/T 9994 Conventional moisture regains of textile materials
GB/T 14334 Sampling method for man-made staple fibres
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 4146 (all parts) and the following apply.
3.1
constant mass
condition that the difference between the two weighings at a certain interval of time does not exceed the specified range after the specimen is processed
Note: This standard specifies that the difference between the two weighings shall not exceed 0.05% of the latter weighing.
3.2
oven weighting
process of weighing the mass of the specimen in the oven with the balance attached to the oven after the specimen is dried in the oven to remove moisture
3.3
cold weighting
process of weighing the mass of the specimen after it is dried in the oven to remove moisture, placed in a vessel and sealed, moved into a dryer for cooling, and then taken out
4 Principle
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 General principles of test
7 Test steps
8 Calculation of results
9 Test report
Annex A (Normative) Correction of mass after drying under non-standard atmospheric conditions
Annex B (Informative) Infrared (or halogen) moisture analyzer method
