GB/T 2910-1997 Quantitative chemical analysis method for two-component fiber blends of textiles
Some standard content:
Jcs_59.080.0t
National Standard of the People's Republic of China
GB/T 29101997
cq1s01833：1977
Textiles
Two-component fiber blended products
Quantitative chemical analysis method
Textile-Binary fibre blends-Ouantitative chemical analysis1997-10-09Published
1998-05-01Implementation
Published by the National Technical Supervision Bureau
G/T 2910
199wwW.bzxz.Net
ISO standard for use in Asia
General test rules
Analysis of the content of products mixed with other fibers--acetone method
Analysis of the content of various white fibers mixed with other fibers--alkaline sodium hypochlorite method Analysis of the content of rubber, steel fiber, high-quality fiber and structure, blue hemp, flat hemp mixed products--formaldehyde/short-terminated zinc 5, polyamide 66 and other fiber mixed products--acetone method
Analysis of the content of acetate fiber and triacetin fiber mixed products--acetone method. 10
Analysis of the content of triacetin fiber and its Content analysis of other fiber products:
Dimethoate method:
Content analysis of cellulose and fiber products -75% (m/yr) by decomposition method, propylene glycol method, fluorine-containing fiber and its derivative products 13.
Content analysis of propylene glycol and other fiber blended products: "Carbon sulfide/acetone method"
15 Content analysis of cellulose and propylene glycol products: "Glycerin acid method"
16 Content analysis of jute and animal fiber products
Content analysis of propylene glycol and other fiber blended products: 17 Content analysis of propylene glycol and other fiber products: Calorie content determination method
·Acetone method
18 Content analysis of ethylene glycol and other fiber blended products: 19. Content analysis of light and related wool or other European fiber blended products Content analysis of 20 kinds of fiber and asbestos blended products Concentrated analysis of 5% (m/m) sulfuric acid method Two-component methyl methacrylate GE/T 2910-1997 This standard is based on the international standard 1501633:1977 - Chemical analysis of two-component fiber blended products GB291 (1-2) was revised. The final text is equivalent to 1S01339. This standard modifies the following contents of B2910-82 standard: 1. Based on G/T 1.1-1993 and 1995.1.12 rectification notice, changed the cover and writing style, added the preface and ISO, added the reference standard introduction, and changed the serial number of each document. 2. According to international standards, the use of 2.5% sodium hydroxide method to analyze animal fiber and other fiber blends, 20% hydrochloric acid to analyze the sodium products of polyurethane fiber and other fibers, and 50% sodium hydrochloric acid to analyze the blended products of polyamide fiber and other fibers was cancelled. 3. According to national standards, the blending of oxygen-containing fiber and common fiber, the blending of propylene with its low-efficiency fiber, and the analysis of cellulose fiber were cancelled. Quantitative chemical analysis of jute and animal fiber blends, jute and animal fiber blends, 4. The drying and cooling time are extended, and specific regulations are made for the drying and cooling time. 5. The powder accuracy and number of times are increased according to international standards. Appendix A of this standard is a reminder appendix. From the date of implementation, this standard replaces G29102. This standard is proposed by China Textile and Apparel Council: This standard is under the responsibility of the Standardization Research Institute of China Textile and Apparel Council, and the standard is under the responsibility of Shanghai Wool and Linen Science and Technology Research Institute. The main drafters of this standard: Xu Jifu, Rao Meihua, Zhong Qin, Jian Sa, Yan Yanping, this standard was first issued in 1982 and revised for the first time in 1997, CB/T2910-.1997
ISO Foreword
ISO (International Organization for Standardization) is a world association of national standards committees (ISO members). The development of international standards is achieved through technical committees. After the technical points of a basic standardization topic are established, each member country has the right to send representatives to participate in the committee if it is interested in the topic. All international organizations, whether official or non-official, after contacting, Can also participate in this work.
The draft international standard produced by the technical committee is circulated to the member countries for approval before it is approved by the Council as an international standard.
International Standard S) 1833 was developed by the Textile Technical Committee (150/T℃35). Its second edition has been received by the following member countries:
New Zealand and the Arab Republic of India
India and the United States: :) Article 1. 4. 1.1. 4 6 and: 6. [T not between 21 dear this 18 of the same
mail technical reasons, underlined as the most countries do not agree with this article as Italy
face Yali
Turkey
United Kingdom "
Israel
Yugoslavia
People's Republic of China Guohao Standard
Textile two-component fiber blended products
Quantitative chemical analysis method
Textile-Binary fihremixturesQauntitatlvechemical analygls1 Fan Gu
GA/T 2910—1997
eqvEso1933.1977
Generation B2913—82
This standard specifies the chemical analysis method for separating the fiber components of mixed products by using chemical reagents with the properties of selective dissolution of fibers.
This standard is used for the analysis of the components of fiber-woven and interwoven products. 2 Referenced standards
The provisions contained in the following standards are all referenced in the following standards: When this standard is published, the versions shown are valid. All standards will be revised. The parties using this standard should consider using the latest version of the following standards. GB8170-87 numerical value rule
GH9994-B5 group village material standard moisture regain
3 consideration
After the components of the blended product are qualitatively determined, an appropriate reagent can be selected to remove one component, and the undissolved fiber is dried and weighed, so as to calculate the percentage of each component fiber
4 general test rules
4.1 Reagents
The reagents used are all chemical reagents.
4.7.1 Petroleum aldehyde, the range is 40.~60℃,
4.1.2 Distilled water or deionized water.
4.1.3 Special reagents, which shall be described in the relevant sections of this standard. 4.2 Instruments
4.2.1 Constant rate measuring instrument.
4.2.2 Constant temperature water solution,
4.2.3 Vacuum pumping system.
4.2.4 Analytical balance, accuracy 0.0002g. 4.2.5 Electric heating air oven, capable of maintaining temperature at 105°C. 4.2.6 Dryer; equipped with color changing amine.
4.2.7 Storage flask: volume not less than 25ml. 4.2.8 Shear glass core material: 30-50ml, micronized sintered material with a micronized density of 40-120/m, with a dense sand glass plug or surface glass on the surface. Other receivers that can achieve the same results may be used instead. Approved by the National Technical Supervision Committee on October 9, 1997, 1998-05-01#
GA/T2910-1997
1. 2. 9 Standard touch screen, measuring tube, measuring cup, thermometer, vacuum method, etc. 4.2.10 Special instruments: In the relevant chapters of this standard. 1.3 Sample preparation
4.3.1 Detailed sampling
The sample should be representative of the enterprise and should contain all kinds of yarn and fiber components of the paper substrate. The number of sample trays should be sufficient to provide the test currency. 4.3.2 Test Methods 4.3.2.1 General Pretreatment Take about 5 ml of the sample and extract it in a Kuhn extractor with 10,000 ml of ethanol. Cycle at least 6 times per hour. After the oil in the sample is evaporated, pour the sample into cold water and soak it for 1 hour. Then place it in 6% caloric acid water at 5°C for 15 minutes. The ratio of water to sample is 100:1. Stir the mixture constantly and then slowly pump or centrifuge to dehydrate and dry. 4.3.2.2 Special pretreatment
Water-resistant materials on the test specimens, such as non-fibrous materials, cannot be treated with petroleum aldehydes and water-removing agents. Special treatment methods are required. At the same time, it is required that this treatment has no effect on the fiber composition. Although some natural fibers (such as jute and bark) can not completely remove all natural fiber materials by using stone and water treatment, such treatment is not used unless the test specimen only has a protective layer of non-chromium in the middle.
4.3.3 Before testing
If the test specimen is a fabric, it should be disassembled into yarns, and felt fabrics should be cut into thin pieces or small pieces (note that each test specimen should include all the components of the fabric).
For each test specimen, at least one , each sample does not need to be, 4.4 Test steps
4.4.1 First version
4.4.1.1 Drying of materials: Put the sample in a drying oven and bake at 10 (3 (16 hours). If the full time is less than 14 hours, it needs to be baked until the value is complete (avoid two consecutive tests and the difference between the five values does not exceed 1). 4.4..1.1 Drying of other samples: Put the sample in a weighing bottle, cover the bottle cap and dry it. Move the upper bottle to a short cooler and weigh it until it is constant.
4.4.1.1.2 Drain the glass sand core: Measure the glass sand core (put it on the dye). Put it in the drying oven and cover it with a lid. Move it to a dryer and cool it quickly. Weigh it until it is constant. 4.4. 1.2 Cooling is done by placing the desiccator on the side of a balance. The cooling time is limited to the test room temperature (usually not less than 30 minutes). 4.4.1.3 Weigh the eggs. After cooling, take out the weighing bottle from the desiccator, pick up glass sand, etc., and weigh them within 2 minutes. The accuracy is 0.0002g. Do not use your hands or other tools to measure the temperature. 4.4.2 Working steps 4.4.2.1 Test sample drying 5 Determination Put the sample (4.3.31 has been carefully weighed in 1 05 After drying in an oven at 3°C for ten minutes, add 1 bottle and transfer to a cold storage tank (4.1.1). Repeat the above drying process until constant temperature is reached. 4.4.2.2 Test procedure for decomposition and separation of each component according to the fiber composition of the product in the relevant sections of this standard. After drying, observe the residue with a microscope to check whether the decomposable fibers are completely removed.
4.5 Calculation of analysis results
There are three calculation methods for the test results
4.5.1 Calculation of net weight fraction
Pr-10mia
GR/T 2910—1997
Wherein: P,—the net lower content percentage of the dissolved fiber group, the net lower content percentage of the dissolved fiber, %: mo-—the net content percentage of the sample after pretreatment + g
i--the net content percentage of the residual fiber, g1
-the net content percentage of the insoluble fiber in the test treatment (various constants in this standard). The value is obtained according to formula (3),
wherein:
The fiber has been pushed to the bottom of the fiber after the pretreatment, 8
4.5.2 Calculation of the total moisture regain percentage P
P,(1-+ )+P(1
-the net content percentage of the insoluble fiber, %; Wherein, the product is
P. The content of soluble fiber combined with the specified dry content is divided into: P, %; P, — percentage of insoluble fiber net dry content, %: P,
percentage of soluble fiber content, %;
— specified recovery rate of insoluble fiber, %!
specified recovery rate of defibrination, %.
4.5.3 Calculation of the specified recovery rate and the percentage of fiber loss and non-final removal in pretreatment Pa =
: Pa-
n. Put in mechanical separator for 1 h, and then filter with a test sand core of known weight. Put the liquid in 60m of alkane in an ane cabinet, stir and filter by hand, and reprocess twice or more. Then transfer the fiber to a sand core, wash with acetone and water, vacuum suction, and then fill it with acetone, stir and filter, and finally vacuum suction, remove the fiber from the sand core and the fiber. 4.4.1 Cool the sand core and weigh it. 9.6 Calculation of results According to the calculation described in 4.5, the d value of diacetyl ester fiber is 1.1.10 Analysis of the content of acetic acid fiber and triacetin fiber pile spinning products - benzyl alcohol method 10.1 Scope of application This method is applicable to the product of acetic acid fiber and triacetin fiber from which the primary fiber material has been removed. 10.2 Treatment
Dissolve the acetic acid fiber from a sample of known weight with methanol, wash the insoluble fiber, dry it, cool it, weigh it, and calculate the components.
10.3 Reagents
10.3.1 Benzyl alcohol,
10.3.2 Acetyl alcohol.
10.4 Apparatus
10.4.1 Flask with a capacity of not less than 20 hhml. 10.4.2 Separator. 10.4.3 Constant temperature water bath, keep the temperature of the flask at 52°C. 10.5 Test steps: Place the sample in a conical flask 4, add 100 mL of methanol per gram of test rod, add a short circuit, and place it in a constant temperature water bath, maintain the temperature at 52°C. Place the flask at this temperature for 20 min ± 1 min, pass it through a glass core with a known surface, do not leave any fibers in the flask, add 10 mL of fresh methanol to the flask. , incubate at 2±2°C for 2msin±1min, filter with the same glass crucible, insoluble fibers remain in the original bottle, add 10ml of ether, repeat the above operation, and pour the fibers into the same glass crucible. Use 52-2°C ether to remove the fibers, and vacuum suction. Then transfer the fibers to a glass crucible, rinse them three times with old ether, and put the insoluble fibers into a glass crucible. Dry, cool and weigh them according to 4.4.1. Calculate the results according to 4.5. The d value of trisaccharide fiber is 1. 00. 10. The degree of fine grinding
For textile materials to be spun evenly, the appropriate degree of this method is 95%, the upper limit of this method is ±1%, 7
GB/T2910--1997
11 Analysis of the content of tri-ether cellulose and other fiber decomposition products-methane method 11.1 Scope of application
This method is applicable to tri-ether cellulose and wool, regenerated strong white fiber, cotton (absolutely scoured or scoured), viscose, cuprammonium cellulose, high The fiber is decomposed into a mixture of fast spinning fiber, broken fiber, energy fiber, the last olefin fiber and broken fiber. The method is applicable to the partially hydrolyzed tri-ester fiber after finishing. 11.2 Original
Use dichloromethane to decompose the tri-ester fiber from the sample with known ten times, wash the unrefined fiber, dry it, cool it, weigh it, and calculate the weight.
11.3 Reagent: methane.
: This test is safe, please take protective measures when using it. 11.4 This instrument: = Flask, put in a plate with a volume of 2℃CmL, 11.5 Test steps
Follow the steps in 4.4.2, then put the sample into the diagonal flask (11.4), add 100mm1. of isothane (11.3) for each gram of sample. Tighten the flask, shake to heat the sample, and let it stand at room temperature for 30min. Shake it every 10min. Use a glass core that has been filled with ten times the amount of water to drain. Do not keep it in the flask. Add 60ml of isothane (1.3) and use it to shake to heat it. The fibers will be washed and burned in the vacuum cleaner, and then the vacuum cleaner will fill the glass core with water and allow it to drain. The glass core and the insoluble particles will be dried according to 1.1.1, cooled and weighed. The sieve count of 11.6 and the calculated fiber value as described in 1.5 show that the overall fiber value is 1. The estimated fiber value is 11.7. The uniformity of the spun fabric is 95%, and the limit of fiber content does not exceed 1%. 12 Analysis of the content of fiber capsule and fiber-spun products 75% (mm2) sulfuric acid method 12.1 Application This method is applicable to the blended products of natural fibers and recycled fibers and residual fibers after the removal of non-fibers: 12.2 Treatment Use 75% (mm2) sulfuric acid to dissolve the fiber from a sample of known dry weight, remove the remaining fibers, cool, weigh and calculate the content. 2.3 Test
12.3.1 75% (bis/trisic acid: 1000ml) solution (density 1.84g/mL) is added to 570ml of water, the concentration of trisic acid is within 73% 77 (m range.
12.3.2 Dilute the solution, 8Uml of concentrated water (density 0.Hg/ml) is diluted with water to 12.4 Apparatus
12.4.1 The apparatus is heated, the volume is not less than 500ml12.4.2 During the heating period, the temperature of the sample can be kept at 56.5℃. 12.5 Monitoring frequency
Carry out as described in 4.4.2, and then put the sample into the flask with an angle of 1/4000. After that, add 200ml of acid (12.3.1) per gram of sample. Install the stopper, and keep the sample in the flask at 50.±5 (1h, and keep the temperature every 1min.) and transfer the non-leafed fiber to the glass sand. Wash the flask with a small amount of sulfuric acid (12.3.1), vacuum-drain, fill the glass core with sulfuric acid (123.1), drain by argon, replace it with 100% vacuum and drain for 30 minutes, then rinse with cold water for several minutes, wash twice with deoxygenated water (12.3.2), then rinse thoroughly with cold water, drain the flask again, vacuum-drain again, and finally dry the insoluble fiber in the glass core according to 4.4.1, cool and weigh.
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