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Quantitative analysis method for yarns

A quantitative analysis and yarn technology, which is applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems of harsh dissolution conditions of chemical reagents, inaccurate test results, and affecting the accuracy of results, so as to eliminate physical hazards and environmental pollution. The test results are accurate and reliable, and the test method is simple

Active Publication Date: 2013-05-15
YANCHENG FANGTIAN NON WOVEN PORDUCTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical method needs to manually split different types of fibers or count the number of different types of fibers, the fibers are thin (micron) and soft, the operation is cumbersome, and the test efficiency is extremely low. At the same time, because some fibers are not too different in appearance Obviously, there will be misclassifications and thus inaccurate test results
The chemical method requires different chemical reagents to dissolve specific fibers. Due to the variety of fibers, the chemical reagents required are also different, and the dissolution conditions of some chemical reagents are harsh, requiring high temperature, and some chemical reagents are toxic. Larger, such as m-cresol, toluene, xylene, dimethylformamide, etc., and some reagents such as concentrated sulfuric acid are more dangerous and pose a greater threat to the human body. cause serious environmental hazards
At the same time, because it is difficult to determine the degree of dissolution during the dissolution process, the fiber is not completely dissolved, which affects the accuracy of the results.
Also makes the overall test less efficient as some fibers are less soluble

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A yarn quantitative analysis method described in the embodiment of the present invention, taking polyester / cotton (blend ratio 60 / 40) blended yarn as an example:

[0016] 1) Polyester / cotton blended yarn pretreatment. Put 10g of yarn in a Soxhlet extractor, extract with petroleum ether for 1 hour, and circulate at least 5 times per hour. After the petroleum ether in the blended yarn volatilizes, soak the blended yarn in cold water for 0.5h, and then soak in water (50℃5℃) for 0.5h. In both cases, the bath ratio is 1:80, and the solution is stirred from time to time, squeezed dry, suction filtered, or centrifugally dehydrated to remove excess water in the blended yarn, and then the blended yarn is naturally dried;

[0017] 2) Preparation of samples. Fold 1g of polyester / cotton blended yarn sample in half into multiple strands, use scissors or a slicer to process the yarn sample into a sample with a size of about 0.2mm, dry the sample in an oven at 100°C, collect the sam...

Embodiment 2

[0023] A yarn quantitative analysis method described in the embodiment of the present invention, taking polyester / polypropylene (blend ratio 70 / 30) blended yarn as an example:

[0024] 1) Pretreatment of polyester / polypropylene blended yarn. Put 5g of yarn in a Soxhlet extractor, extract with petroleum ether for 0.8h, and circulate at least 7 times per hour. After the petroleum ether in the blended yarn volatilizes, soak the blended yarn in cold water for 0.2h, and then soak in water (50℃5℃) for 0.3h. In both cases, the bath ratio is 1:50, and the solution is stirred from time to time, squeezed dry, suction filtered, or centrifugally dehydrated to remove excess water in the blended yarn, and then the blended yarn is naturally dried;

[0025] 2) Preparation of samples. Fold 1g of yarn sample into multiple strands, use scissors or a slicer to process the yarn sample into a sample with a size of about 0.3mm, dry the sample in an oven at 105°C, collect the sample and reweigh its...

Embodiment 3

[0031] A yarn quantitative analysis method described in the embodiment of the present invention, taking polyethylene / polypropylene (blend ratio 50 / 50) blended yarn as an example:

[0032]1) Ethylene / polypropylene blended yarn pretreatment. Put 7g of yarn in a Soxhlet extractor, extract with petroleum ether for 0.8h, and circulate at least 6 times per hour. After the petroleum ether in the blended yarn volatilizes, soak the blended yarn in cold water for 0.4h, and then soak in (505°C) water for 0.4h. In both cases, the bath ratio is 1:60. Stir the solution from time to time, squeeze dry, suction filter, or centrifugal dehydration to remove excess water in the blended yarn, and then dry the blended yarn naturally;

[0033] 2) Preparation of samples. Fold the 0.5g yarn sample in half into multiple strands, use scissors or a slicer to process the yarn sample into a sample with a size of about 0.4mm, dry the sample in an oven at 110°C, collect the sample and weigh it again The d...

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Abstract

The invention provides a quantitative analysis method for yarns. The quantitative analysis method comprises the following steps of: processing fibers in a yarn to be a fiber test sample with a size less than 0.5mm; selecting a proper dispersed medium; placing the fiber test sample into a measuring pot for stirring according to the difference of densities of fiber raw materials which is used for preparing the yarn, so that the fiber test sample is layered; and separating the fiber test sample, and washing, drying and weighing the fiber test sample, so that the yarn is quantitatively analyzed, and a blending ratio of the yarn is obtained. The quantitative analysis method provided by the invention has the beneficial effects of being simple, quick in operation, and accurate and reliable in test result, can be used for the conventional fibers, and has a universal type. Meanwhile, the body damage and the environment pollution on operators can be avoided as a harmful chemical reagent is not used.

Description

technical field [0001] The invention relates to a method for quantitative analysis of yarn, in particular to a method for quantitative analysis of yarn by using fiber density difference. Background technique [0002] The quantitative analysis of yarn is to analyze the dry weight ratio of various textile fibers that make up the yarn, also known as the blending ratio. Quantitative analysis of yarn is a very important experiment to analyze yarn content and determine spinning process parameters. Due to the various types and properties of the textile fibers that make up the yarn, the current quantitative analysis methods for the yarn are also various, which can be mainly classified into physical methods and chemical methods, and physical methods are divided into manual methods. Resolution and microscopy assays. For fibers that can be distinguished by visual inspection, the manual splitting method is used to split, dry, and weigh the fibers in the yarn to calculate the fiber dry...

Claims

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Application Information

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IPC IPC(8): G01N5/00
Inventor 周彬王慧玲
Owner YANCHENG FANGTIAN NON WOVEN PORDUCTS CO LTD
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