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Method for determining spandex in spandex and cellulose fiber blended knitted product

A technology of cellulose fiber and spandex fiber, which is applied in the field of analysis and testing, can solve the problems of difficulty in disassembly, damage of cellulose fiber, and low accuracy of test data, and achieve the effect of high quantitative accuracy and reduced damage

Inactive Publication Date: 2018-11-23
PONY TESTING INT GRP SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The data obtained by the split method is relatively accurate, but due to pure manual detection, time-consuming and manpower-consuming, the test efficiency is low; and a considerable part of the blended knitted products of regenerated cellulose fiber and spandex is difficult to split, resulting in the inconsistency of the test data. less accurate
However, the dimethylformamide method will cause certain damage to cellulose fibers, especially for some samples with dark colors or more non-fibrous substances, and the results obtained are often quite different from the actual results.

Method used

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  • Method for determining spandex in spandex and cellulose fiber blended knitted product
  • Method for determining spandex in spandex and cellulose fiber blended knitted product
  • Method for determining spandex in spandex and cellulose fiber blended knitted product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Select a whole piece of cotton / spandex blended gray knitted sample, cut 20 samples of about 1g from different parts, of which 10 samples are tested for fiber content by split method, and the remaining 10 samples are dried and weighed. After weighing, put them into 500mL glass beakers for later use. Add 200mL sodium hypochlorite solution (available chlorine concentration is 1.8mol / L) one by one, boil until boiling, filter with 80-mesh sieve, collect the residue, dry it and weigh it for calculation. The summary of 10 sets of test data is shown in Table 1:

[0022] Table 1 Comparison of fiber content results of cotton / spandex blended knitwear

[0023]

[0024]

[0025] It can be seen from the above table that the results obtained by the sodium hypochlorite solution boiling method and the split method for quantifying cotton / spandex blended products are relatively small, which is in line with the provisions of GB / T 29862-2013 "Identification of Fiber Content in Textil...

Embodiment 2

[0027] Select a whole piece of viscose / spandex blended sky blue knitted sample, cut 20 samples of about 1g from different parts, of which 10 samples are tested for fiber content by split method, and the remaining 10 samples are dried and weighed for testing. After the samples were dried, put them into 500mL glass beakers for later use. Add 200mL sodium hypochlorite solution (available chlorine concentration is 2.1mol / L) one by one, boil until boiling, filter with 80-mesh sieve, collect the residue, dry it and weigh it for calculation. The summary of 10 groups of test data is shown in Table 2:

[0028] Table 2 Comparison of fiber content results of viscose / spandex blended knitwear

[0029]

[0030]

[0031] It can be seen from the above table that there is little difference between the results obtained by the sodium hypochlorite solution boiling method and the split method for quantifying viscose / spandex blended products, which are in line with the provisions of GB / T 298...

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Abstract

The invention discloses a method for determining spandex in a spandex and cellulose fiber blended knitted product. The method comprises the following steps of performing cutting drying and weighing on samples; then, putting the samples into a glass flask for use; pouring a sodium hypochlorite solution at a certain concentration into a flask containing the sample; at the normal temperature and thenormal pressure, putting the materials onto a sealed electric furnace; performing heating until the solution boils; collecting residues by a stainless steel sieve screen being 80 meshes; performing cleaning, drying and weighing; calculating the percentage of material in the dry mass of the mixture; obtaining the mass percentage of a second ingredient by the difference value. Compared with a dimethyl formamide method used in the standard, the method has the advantages that the quantitative accuracy is higher; the toxicity is smaller; the method is more applicable to elastic knitted products which cannot realize the quantitation by a manual decomposition method. In addition, the 80-mesh stainless steel scree is used for replacing the sand core crucible; the sand core crucible cleaning stepis omitted; convenience and environment protection are realized.

Description

technical field [0001] The invention belongs to the field of analysis and testing, and relates to a detection technology for textile fiber content, in particular to a method for measuring spandex in spandex and cellulose fiber blended knitting products. Background technique [0002] With the progress of the times and people's requirements for clothing comfort are getting higher and higher, cellulose fibers are widely used in personal clothing because of their soft feel and good hygroscopicity, but the weakness of poor elasticity makes them in There are certain flaws in the shape. Therefore, blended products such as cotton / spandex with elastic fibers, even viscose / spandex and modal / spandex fibers with silky luster are becoming more and more popular among consumers. [0003] For products blended with cellulose fiber and spandex, the quantitative test of fiber content has always been based on the split method and chemical analysis method (dimethylformamide method) in FZ / T01095...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 宋薇赵俪玥
Owner PONY TESTING INT GRP SHANGHAI CO LTD
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