A method for detecting the blending ratio of hot-melt fiber based on the change rate of light transmission

A detection method and technology of light transmittance, applied in the direction of transmittance measurement, etc., can solve the problems such as the inability to quantitatively detect the micro melting point instrument and the difference in melting point, etc., and achieve the effects of easy promotion and application, accurate results, and universal testing equipment.

Active Publication Date: 2018-02-02
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention belongs to the qualitative and quantitative analysis technology of multi-component fiber blended products in the field of textile detection. The purpose of the invention is to efficiently solve a series of hot-melt chemical fibers with different melting points in quantitative detection in the current textile industry, especially those with similar chemical structures but similar solubility properties. Quantitative analysis of multi-component hot-melt polyester fiber blended products with obvious differences in melting point, and also solves the defect that the existing micro-melting point instrument cannot perform quantitative detection

Method used

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  • A method for detecting the blending ratio of hot-melt fiber based on the change rate of light transmission
  • A method for detecting the blending ratio of hot-melt fiber based on the change rate of light transmission
  • A method for detecting the blending ratio of hot-melt fiber based on the change rate of light transmission

Examples

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Effect test

Embodiment 1

[0036] Example 1 Quantitative analysis of the blending ratio of polyester fiber PBT and PET blended yarn

[0037] The first step, sample preparation, cut the blended yarn sample into mixed fiber fragments with a length of 80um with a Hastelloy slicer, then weighed 10mg of mixed fiber fragments with a ten-thousandth balance, and evenly dispersed them on a piece of cover glass On the slide, cover with a second coverslip, evenly sandwiching the mixed fiber fragments.

[0038] The second step is to qualitatively detect the types of fibers in the blended samples and their corresponding melting points. Place the coverslip assembly on the detection device (such as figure 1 Shown) on the sample stage 1, make the uniformly dispersed fiber fragments just above the light-transmitting hole with a diameter of 0.8cm, cover the heat preservation cover 4, and pass in nitrogen gas from the air inlet 6 for protection. The temperature rises at a rate of 3°C / min. When the temperature is close t...

Embodiment 2

[0047] Quantitative analysis of embodiment 2 polyester fiber PBT / PTT / PET blended fabric blending ratio

[0048] The first step, sample preparation, cut the blended fabric sample into 60um mixed fiber fragments with a Hastelloy slicer, then weigh 20mg of mixed fiber fragments with a ten-thousandth balance, and disperse them evenly on a cover glass , followed by a second coverslip, sandwiching the mixed fiber fragments evenly in between.

[0049] The second step is to qualitatively detect the types of fibers in the blended samples and their corresponding melting points. Place the cover glass assembly on the sample stage on the detection device, so that the evenly dispersed fiber fragments are just above the light-transmitting hole with a diameter of 1 cm, cover the heat preservation cover, and pass nitrogen gas into the air inlet for protection. Raise the temperature at a rate of 2-3°C / min. When the temperature is close to 223°C, the light transmittance increases significantly...

Embodiment 3

[0061] Example 3 Quantitative analysis of blending ratio of polyester PET / polypropylene PP blended fabric

[0062] The first step, sample preparation, cut the blended fabric sample into 40um mixed fiber fragments with a Hastelloy slicer, then weigh 30mg of mixed fiber fragments with a ten-thousandth balance, and disperse them evenly on a cover glass , followed by a second coverslip, sandwiching the mixed fiber fragments evenly in between.

[0063]The second step is to qualitatively detect the types of fibers in the blended samples and their corresponding melting points. Place the cover glass assembly on the sample stage of the detection device, so that the evenly dispersed fiber fragments are just above the light-transmitting hole with a diameter of 1.2 cm, cover the heat preservation cover 4, and pass nitrogen gas from the air inlet 6 For protection, heat up at a rate of 2-3°C / min. When the temperature is close to 160°C, the light transmittance increases significantly, the t...

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Abstract

The invention discloses a method for detecting the blending ratio of hot-melt chemical fibers based on the change rate of light transmission, which comprises the following steps: (1) making blended fiber fragments with a length of less than 100um from a blended sample, and uniformly dispersing 10mg to 40mg of the blended fiber fragments Make a sample assembly between two glass slides; (2) Place the sample assembly on a detection device with a light aperture of 0.8-1.5 cm to detect the fiber type and the corresponding melting point; (3) According to the blended sample Prepare mixed standard samples with different mixing ratios according to fiber types, and establish a quantitative detection curve between the percentage content of low melting point fibers and the change rate of light transmittance on the detection device according to the fiber type and its melting point; (4) Quantitative detection of blended samples The percentage content of each component fiber. The detection device of the present invention includes a sample platform, a sample heating protection module, a heating and control module, a light quantity change detection module, and data processing and storage and display components.

Description

technical field [0001] The invention belongs to the field of quantitative analysis of heat-melt synthetic fiber blended products, in particular to the qualitative and quantitative analysis of the blending ratio of the blended products of heat-melt chemical fibers with similar chemical structures but different melting points. Background technique [0002] At present, in textile testing institutions and related enterprises, the qualitative identification and quantitative analysis of textile fiber products mainly rely on microscopy, chemical dissolution and infrared spectroscopy. However, some chemical fiber blended products with similar chemical structures are difficult to quantitatively analyze by chemical dissolution. Polyester and polypropylene are insoluble chemical fibers, and the quantitative analysis of their blended products cannot be analyzed by the dissolution method; the solubility of PA6, PA66, and PA11 chemical fibers in nylon fibers is similar, and their blended ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/59
Inventor 巫莹柱张晓利叶湖水李焰冯杏清蔡燕辉
Owner WUYI UNIV
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