CN105334136A - Fiber content quantitative chemical analysis method for polyester and spandex products - Google Patents
Fiber content quantitative chemical analysis method for polyester and spandex products Download PDFInfo
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- CN105334136A CN105334136A CN201510781898.5A CN201510781898A CN105334136A CN 105334136 A CN105334136 A CN 105334136A CN 201510781898 A CN201510781898 A CN 201510781898A CN 105334136 A CN105334136 A CN 105334136A
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Abstract
The invention relates to a fiber content analysis method in the field of textile, and discloses a fiber content quantitative chemical analysis method for polyester and spandex products. Spandex is dissolved through sulfuric acid, and a test result is closest to the actual fiber content under the condition that the concentration of the sulfuric acid is 70%, the temperature is 70+/-2 DEG C and the dissolving time is 30+/-5 min. The method has the advantages that a large number of tests can be carried out quickly through the chemical analysis method, and the content of spandex in the polyester and spandex products can be accurately detected in time. The improved technological procedures are suitable for the polyester and spandex products containing various auxiliaries, and dissolving adaptability of the products is greatly widened. Meanwhile, dissolving efficiency and result accuracy are improved.
Description
Technical field
The present invention relates to a kind of fiber content analysis method of field of textiles, particularly relate to one and wash ammonolysis product fiber content method for carrying out quantitative chemical analysis.
Background technology
Terylene and spandex are two kinds of raw materials conventional in textile manufacturing, its blending product not only has excellent elasticity, warmth retention property, dyeability, practicality, and can give human body good haptic effect in clothes dress, and affordable, spinning property is very high, in recent years, clothes had more application, especially became desirable underwear and swimsuit class raw material.In textile component analysis, wash ammonia component ratio according to the preliminary statistics account for 12%, therefore it is very important for washing ammonolysis product analysis, for inherent quality and the cost accounting of correct assurance terylene and spandex blending product, all need to measure accurately the blending product of this series products.
In routine testing process, find that existing ammonolysis product fiber content method for carrying out quantitative chemical analysis of washing exists some defects, affect the accuracy of experimental result.80% sulfuric acid dissolution method temperature is adopted not to be very desirable in test as FZ/T01095-2002 textile spandex product fiber content, especially can not be fine only molten to the ammonia fabric of washing of coating, the sulfuric acid concentration of 80% is high simultaneously, easily causes danger.GB/T2910.20-2009 textile quantitative chemical analysis 20 part: in select the reagent in dimethyl acetamide agent dissolves method to have very large harm to human body, a lot of people is irritated to this reagent, and after dissolving, easily there is reversed reaction, require higher to experimenter, the dissolving demand of coated fabrics can not be solved very well.
Summary of the invention
The object of the invention is the deficiency in order to overcome the quantitative analysis method of existing terylene spandex blending product fiber content, provide a kind of process of the test more easily to control, test efficiency is higher, and test findings washs ammonolysis product fiber content method for carrying out quantitative chemical analysis more accurately.
Technical scheme of the present invention is achieved in that washs ammonolysis product fiber content method for carrying out quantitative chemical analysis, and sample adopts sulfuric acid dissolution spandex, described h 2 so 4 concentration is 70%, and solution temperature is: 70 DEG C ± 2 DEG C, dissolution time: 30 ± 5min, collect terylene after dissolving, calculate fiber content.
It is described that to wash ammonolysis product fiber content method for carrying out quantitative chemical analysis concrete technology as follows:
(1) sample: take terylene and spandex blended fabric sample is for subsequent use;
(2) spandex is dissolved: put into by sample and the tool plug Erlenmeyer flask that mass concentration is the sulfuric acid solution of 70% is housed, every gram of sample adds 100mL test solution, covers bottle stopper, then 30min ± 5min in water-bath Erlenmeyer flask being placed on 70 DEG C ± 2 DEG C, spandex is dissolved;
(3) terylene is collected: filtered by the filtering crucible of having weighed of the residue in Erlenmeyer flask, then the synthermal sulfuric acid of residue is rinsed 2 times, again with normal-temperature distilled washing 3 ~ 4 times, with in weak aqua ammonia and 2 times, then be washed to till being neutrality with indicator inspection, must with vacuum pump aspirate discharge opeing after washing at every turn, finally dry crucible and residue, cool and weigh;
(4) calculate: test findings represents with the mean value of twice test, if when the result absolute difference that twice test records is greater than 1%, the 3rd specimen test should be carried out, test findings represents with three test mean values, test findings is calculated to 2 significant digits, the revision of the convention is to one decimal place, and the numerical value revision of the convention is undertaken by GB8170-1987 regulation, calculates fiber content.
Principle of the present invention is: the component of two component product, after Qualitative Identification, selects suitable agent dissolves to remove a kind of component, by undissolved fiber wash, oven dry, cools, weighs, calculate the percentage composition of each component.Specific to washing ammonolysis product fiber content, select certain density sulfuric acid solution under uniform temperature, time conditions, what act on a certain amount of dry weight washs ammonia blending sample, through dissolving removing spandex, and residue polyster fibre, thus make two kinds of fiber separation.Insoluble polyster fibre is washed, dries, cools, weighed, finally calculates the fiber content percent (the d value of polyster fibre is 1.01, and the d value of spandex is 1.00) of two components.
Described weak aqua ammonia gets the strong aqua that 20mL density is 0.880g/mL, is diluted with water to the weak aqua ammonia of 1L.
The invention has the advantages that: adopt chemical analysis method, can test fast, in a large number, promptly and accurately detect the content washing spandex in ammonolysis product.Technological process after improvement is applicable to washing ammonolysis product containing various auxiliary agent, has greatly widened the dissolving adaptability of product.Also improve the accuracy of dissolved efficiency and result simultaneously.
Embodiment
In conjunction with example, the present invention will be further described.
Embodiment 1:
Choose and knownly wash the knitted fabric that ammonia ratio is 85/15, take sample 1g(and be accurate to 1mg), sample is put into the tool plug Erlenmeyer flask that 70% sulfuric acid solution is housed, every gram of sample adds 100mL test solution, cover bottle stopper, again Erlenmeyer flask is placed on 30min ± 5min in the water-bath of 70 DEG C ± 2 DEG C, spandex is dissolved.Residue in the Erlenmeyer flask filtering crucible of having weighed is filtered, then the synthermal sulfuric acid of residue is rinsed 2 times, again with normal-temperature distilled washing 3 ~ 4 times, (strong aqua that 20mL density is 0.880g/mL is got with weak aqua ammonia, be diluted with water to 1L) in and 2 times, be then washed to till being neutrality with indicator inspection, after washing, discharge opeing must be aspirated with vacuum pump at every turn, finally dry crucible and residue, cool and weigh.Test findings represents with the mean value of twice test, if when the result absolute difference that twice test records is greater than 1%, should carry out the 3rd specimen test, and test findings represents with three test mean values.Test findings is calculated to 2 significant digits, and the revision of the convention is to one decimal place, and the numerical value revision of the convention is undertaken by GB8170-1987 regulation.Calculate fiber content for washing ammonia ratio 84.2/15.8, minimum with known results difference.
Embodiment 2:
Choose and knownly wash the knitted fabric that ammonia ratio is 80/20, take sample 1g(and be accurate to 1mg), sample is put into the tool plug Erlenmeyer flask that 70% sulfuric acid solution is housed, every gram of sample adds 100mL test solution, cover bottle stopper, again Erlenmeyer flask is placed on 30min ± 5min in the water-bath of 70 DEG C ± 2 DEG C, spandex is dissolved.Residue in the Erlenmeyer flask filtering crucible of having weighed is filtered, then the synthermal sulfuric acid of residue is rinsed 2 times, again with normal-temperature distilled washing 3 ~ 4 times, (strong aqua that 20mL density is 0.880g/mL is got with weak aqua ammonia, be diluted with water to 1L) in and 2 times, be then washed to till being neutrality with indicator inspection, after washing, discharge opeing must be aspirated with vacuum pump at every turn, finally dry crucible and residue, cool and weigh.Test findings represents with the mean value of twice test, if when the result absolute difference that twice test records is greater than 1%, should carry out the 3rd specimen test, and test findings represents with three test mean values.Test findings is calculated to 2 significant digits, and the revision of the convention is to one decimal place, and the numerical value revision of the convention is undertaken by GB8170-1987 regulation.Calculate fiber content for washing ammonia ratio 80.1/19.9, minimum with known results difference.
Embodiment 3:
Choose and knownly wash the band coating woven fabric that ammonia ratio is 85/15, take sample 1g(and be accurate to 1mg), sample is put into the tool plug Erlenmeyer flask that 70% sulfuric acid solution is housed, every gram of sample adds 100mL test solution, cover bottle stopper, again Erlenmeyer flask is placed on 30min ± 5min in the water-bath of 70 DEG C ± 2 DEG C, spandex is dissolved.Residue in the Erlenmeyer flask filtering crucible of having weighed is filtered, then the synthermal sulfuric acid of residue is rinsed 2 times, again with normal-temperature distilled washing 3 ~ 4 times, (strong aqua that 20mL density is 0.880g/mL is got with weak aqua ammonia, be diluted with water to 1L) in and 2 times, be then washed to till being neutrality with indicator inspection, after washing, discharge opeing must be aspirated with vacuum pump at every turn, finally dry crucible and residue, cool and weigh.Test findings represents with the mean value of twice test, if when the result absolute difference that twice test records is greater than 1%, should carry out the 3rd specimen test, and test findings represents with three test mean values.Test findings is calculated to 2 significant digits, and the revision of the convention is to one decimal place, and the numerical value revision of the convention is undertaken by GB8170-1987 regulation.Calculate fiber content for washing ammonia ratio 85.2/14.8, minimum with known results difference.
Embodiment 4:
Choose and knownly wash the knitted fabric that ammonia ratio is 95/5, take sample 1g(and be accurate to 1mg), sample is put into the tool plug Erlenmeyer flask that 70% sulfuric acid solution is housed, every gram of sample adds 100mL test solution, cover bottle stopper, again Erlenmeyer flask is placed on 30min ± 5min in the water-bath of 70 DEG C ± 2 DEG C, spandex is dissolved.Residue in the Erlenmeyer flask filtering crucible of having weighed is filtered, then the synthermal sulfuric acid of residue is rinsed 2 times, again with normal-temperature distilled washing 3 ~ 4 times, (strong aqua that 20mL density is 0.880g/mL is got with weak aqua ammonia, be diluted with water to 1L) in and 2 times, be then washed to till being neutrality with indicator inspection, after washing, discharge opeing must be aspirated with vacuum pump at every turn, finally dry crucible and residue, cool and weigh.Test findings represents with the mean value of twice test, if when the result absolute difference that twice test records is greater than 1%, should carry out the 3rd specimen test, and test findings represents with three test mean values.Test findings is calculated to 2 significant digits, and the revision of the convention is to one decimal place, and the numerical value revision of the convention is undertaken by GB8170-1987 regulation.Calculate fiber content for washing ammonia ratio 95.2/4.8, minimum with known results difference.
The sample of above known results is tested with FZ/T01095-2002 and GB/T2910.20-2009 simultaneously, and distinct methods comparison of test results is as follows:
This method and existing method FZ/T01095-2002 comparison of test results are in table 1:
Table 1 two kinds of method contrast test data
| Test method | FZ/T 01095-2002 | This method | Absolute difference |
| 85/15 wash ammonia knit fabric | 84.0/16.0 | 84.2/15.8 | 0.2 |
| 80/20 wash ammonia knit fabric | 80.2/19.8 | 80.1/19.9 | 0.1 |
| The band coating woven fabric of 85/15 | 82.8/17.2 | 85.2/14.8 | 2.4 |
| 95/5 wash ammonia knit fabric | 95.1/4.9 | 95.2/4.8 | 0.1 |
This method and GB/T2910.20-2009 comparison of test results are in table 2:
Table 2 two kinds of method contrast test data
| Test method | GB/T2910.20-2009 | This method | Absolute difference |
| 85/15 wash ammonia knit fabric | 84.5/15.5 | 84.2/15.8 | 0.3 |
| 80/20 wash ammonia knit fabric | 79.8/20.2 | 80.1/19.9 | 0.3 |
| The band coating woven fabric of 85/15 | 80.0/20.0 | 85.2/14.8 | 5.2 |
| 95/5 wash ammonia knit fabric | 93.7/6.3 | 95.2/4.8 | 1.5 |
Conclusion: through experimental results demonstrate, sulfuric acid concentration is 70%, and temperature is at 70 DEG C ± 1 DEG C, and dissolution time: 30min, under this condition, error is minimum, and especially coating fabric testing result is more accurate.
Claims (3)
1. wash ammonolysis product fiber content method for carrying out quantitative chemical analysis, it is characterized in that: sample adopts sulfuric acid dissolution spandex, and described h 2 so 4 concentration is 70%, solution temperature is: 70 DEG C ± 2 DEG C, dissolution time: 30 ± 5min, collects terylene after dissolving, calculates fiber content.
2. according to claim 1ly wash ammonolysis product fiber content method for carrying out quantitative chemical analysis, it is characterized in that: concrete technology is as follows:
(1) sample: take terylene and spandex blended fabric sample is for subsequent use;
(2) spandex is dissolved: put into by sample and the tool plug Erlenmeyer flask that mass concentration is the sulfuric acid solution of 70% is housed, every gram of sample adds 100mL test solution, covers bottle stopper, then 30min ± 5min in water-bath Erlenmeyer flask being placed on 70 DEG C ± 2 DEG C, spandex is dissolved;
(3) terylene is collected: filtered by the filtering crucible of having weighed of the residue in Erlenmeyer flask, then the synthermal sulfuric acid of residue is rinsed 2 times, again with normal-temperature distilled washing 3 ~ 4 times, with in weak aqua ammonia and 2 times, then be washed to till being neutrality with indicator inspection, must with vacuum pump aspirate discharge opeing after washing at every turn, finally dry crucible and residue, cool and weigh;
(4) calculate: test findings represents with the mean value of twice test, if when the result absolute difference that twice test records is greater than 1%, the 3rd specimen test should be carried out, test findings represents with three test mean values, test findings is calculated to 2 significant digits, the revision of the convention is to one decimal place, and the numerical value revision of the convention is undertaken by GB8170-1987 regulation, calculates fiber content.
3. according to claim 2ly wash ammonolysis product fiber content method for carrying out quantitative chemical analysis, it is characterized in that: described weak aqua ammonia gets the strong aqua that 20mL density is 0.880g/mL, is diluted with water to the weak aqua ammonia of 1L.
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Cited By (3)
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| CN112461703A (en) * | 2020-11-24 | 2021-03-09 | 深圳市天林智能科学仪器有限公司 | Batch fiber dissolving method |
| CN112683724A (en) * | 2020-12-29 | 2021-04-20 | 必维申优质量技术服务江苏有限公司 | Quantitative analysis method for polyester fiber and spandex fabric |
| CN112763370A (en) * | 2020-12-21 | 2021-05-07 | 山东省产品质量检验研究院 | Method for removing film material on surface of fabric and application thereof |
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