This standard is a test method for determining the moisture regain or moisture content of raw ramie, refined dried ramie (including oil-free refined dried ramie), water-soaked ramie and oil-soaked ramie. All tests during production, acceptance and delivery shall be conducted in accordance with this standard. GB 5883-1986 Ramie moisture regain and moisture content test method GB5883-1986 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Testing method of moisture regain andmoisture content of ramie fiberUDC 677. 151. 014
GB 5883--86
This standard is a test method for determining the moisture regain or moisture content of raw ramie, refined dried ramie (including oil-free refined dried ramie), water-based ramie and oil-based ramie. All tests during production, acceptance and delivery shall be conducted in accordance with this standard. Sampling
Perform in accordance with GB5881-86 "Sampling Method for Test of Physical and Chemical Properties of Ramie". 2 Test conditions
It can be carried out under normal atmospheric conditions.
3 Test cycle
Periodic tests can be carried out according to production needs, and each batch shall be tested at least once. Test instruments
4.1 Glass instruments
High weighing bottle: Φ40mm×70mm;
Glass dryer: 180mm.
Weighing instruments
Precision analytical balance: sensitivity of one ten-thousandth of a gram; a.
Second-class industrial balance: sensitivity of one hundredth of a gram. b.
4.3 Heating and drying equipmentbzxZ.net
Electrical constant temperature drying oven.
Technical parameters
Temperature control range: 50°～150℃,
Sensitivity: ± 1℃.
5 Test method
Reference model
Y801A
Y802A
5.1 Method for determining moisture regain or moisture content in quantitative analysis of chemical composition of raw ramie (raw ramie) 5.1.1 Sample preparation
Randomly select from the mixed ramie sample and make a single sample weighing about 5g, a total of 3. 5.1.2 Test steps
Put the samples in weighing bottles of known weight and weigh them accurately on a precision analytical balance, place them in an electric constant temperature drying oven at 105-110℃ and dry them to constant weight (the difference between the two weights should not exceed 0.02% of the latter weight), take them out and quickly put them in a desiccator to cool for 30±5 min, and accurately weigh the total weight of the ramie sample and the weighing bottle and record them. 5.2 Method for determining moisture regain and moisture content separately 5.2.1 Sample preparation
Issued by the National Bureau of Standards on January 21, 1986
Implemented on October 1, 1986
GB5883-86
Randomly select two samples of a certain weight from the mixed and sorted ramie samples. Each sample of raw ramie (raw ramie) and refined ramie (including oil-free refined ramie) weighs about 30g, and each sample of water ramie and oil ramie weighs about 50g. 5.2.2 Test steps
Place the samples one by one in the hanging basket of a constant temperature drying oven and weigh them quickly and record them. Then dry them at 105-110℃ to constant weight (weigh them once every 10 minutes, and the difference between the two weights should not exceed 0.05% of the weight of the latter one), and record them. 6 Calculation method
6.1 Moisture regain
The moisture regain of ramie is calculated according to formula (1):
Where: w
--moisture regain of sample, %,
G--wet weight of sample, g;
Go--dry weight of sample, g.
6.2 Moisture content
The moisture content of ramie is calculated according to formula (2):
Where: m--
moisture content of sample, %.
6.3 Rounding of numbers
GG.
(2)
The moisture regain and moisture content are rounded to the second decimal place. The rounding of numbers shall be carried out according to the rounding rules for numbers (supplement) in Appendix C of GB1.1-81 "General provisions for the preparation of standards in the guidelines for standardization work". 44
A, 1 Test record of moisture regain and moisture content of ramie GB5883-86
Appendix A
Tabular form
(reference)
Test record of moisture regain and moisture content of ramie
Specimen name
A.2 Other types of instruments that meet the technical requirements may also be used. Additional remarks:
Laboratory number
Moisture regain
This standard was proposed by the Ministry of Textile Industry of the People's Republic of China and is under the jurisdiction of the Standardization Research Institute of the Ministry of Textile Industry. Moisture content
This standard was drafted by the East China Textile Institute, and was jointly drafted by Zhuzhou Lanma Textile Printing and Dyeing Factory and Shanghai No. 9 Cotton Textile Factory. The main drafters of this standard are Jiang Fanchang and Bu Kuan. 45
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