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Authentication method for composite fiber

A composite fiber and fiber technology, which is applied in the field of composite fiber identification, can solve the problems of composite fiber identification uncertainty, prone to errors and omissions, and high bending stability of side-by-side composite fibers, so as to reduce inspection costs and inspection cycles, and reduce manpower Effects of cost-effective fiber inspection

Active Publication Date: 2015-12-23
GUANGZHOU FIBER PROD TESTING & RES INST
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  • Abstract
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Problems solved by technology

[0004] However, due to the special structure of the composite fiber, for example, the surface fiber of the skin-core composite fiber is thinner, and the adhesion between the surface layer and the inner layer is higher; the existence of special structures such as high bending stability of the side-by-side composite fiber, conventional Fiber component identification methods are uncertain in the identification of composite fibers, and are prone to errors and omissions

Method used

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  • Authentication method for composite fiber
  • Authentication method for composite fiber
  • Authentication method for composite fiber

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Experimental program
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Effect test

Embodiment 1

[0055] Embodiment 1 Differential scanning calorimetry analysis condition screening

[0056] 1. Determination of the maximum temperature.

[0057] In order to achieve the purpose of obtaining real thermal analysis data of fiber samples and protecting the instrument, it is necessary to reasonably set the maximum temperature of the differential scanning calorimetry test to ensure that the sample does not decompose under the condition of melting the sample.

[0058] However, all materials suffer from thermal hysteresis when subjected to thermal analysis testing, especially materials with poor thermal conductivity such as textiles. The fundamental reason for the thermal hysteresis effect is that there is a temperature gradient between the surface layer and the inner layer of the fiber sample during the heat absorption or heat release process. During the heating process, the greater the heating rate, the more serious the thermal hysteresis, which will easily lead to a larger measur...

Embodiment 2

[0081] A method for identifying composite fibers, the operation process is as follows Figure 13 shown, including the following steps.

[0082] 1. Establish a database of standard fiber samples.

[0083] Get different types of single-component standard fiber samples, in the present embodiment, the fiber standard samples include: polyethylene (polyethylene) fiber (PE), polypropylene (polypropylene) fiber (PP), polyester fiber (PET) , Polyamide fiber (PA). Those skilled in the art know that the fiber types in the fiber standard sample database can be selected, added and adjusted according to actual detection needs.

[0084] Use a ball mill or grinder to fully short the fiber standard sample to a length of 1-3 mm, and mix it evenly, and then perform thermogravimetric analysis on the above fiber standard sample. In this embodiment, the selected thermogravimetric analysis test conditions are: Nitrogen atmosphere, the initial heating temperature is 50°C, the maximum heating tempe...

Embodiment 3

[0111] In this embodiment, the composite fiber sample 3 is tested according to the above-mentioned differential scanning calorimetry conditions and steps, and the primary cooling and secondary heating DSC spectra of the composite fiber sample 3 are obtained. The results are as follows Figure 20-21 Shown, and each characteristic temperature obtained by analysis is shown in Table 4.

[0112] Table 4 Differential scanning calorimetry analysis data of composite fiber sample 3

[0113]

[0114] Compare the differential scanning calorimetry data of the composite fiber sample 3 obtained above with the characteristic temperature of the primary cooling and the characteristic temperature of the secondary heating in the pre-established fiber standard sample differential scanning calorimetric analysis database, and the identification results are shown in the table 5.

[0115] Table 5 Analysis and Judgment Results of Composite Fiber Sample 3

[0116]

[0117]

[0118] From the ...

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Abstract

The invention relates to an authentication method for a composite fiber, and belongs to the technical field of analysis and authentication of fiber components. The authentication method comprises the following steps: construction of a standard fiber sample database: smashing and uniformly mixing different types of single-component standard fiber samples, carrying out differential scanning calorimetry test to obtain differential scanning calorimetry analysis data of the different types of single-component standard fiber samples, and constructing the standard fiber sample database; authentication and judgment: smashing and uniformly mixing fiber samples to be tested, carrying out differential scanning calorimetry test to obtain differential scanning calorimetry analysis data of the fiber samples to be tested, comparing the differential scanning calorimetry analysis data with data in the standard fiber sample database, and judging the type of the fiber samples to be tested. According to the authentication method, the type of the fibers can be accurately authenticated, especially the types of respective constituent fibers in the composite fiber; furthermore, the method belongs to a pure thermal analysis method, and has the advantages of small sample demand, zero humidifying pretreatment, accurate test result and high repetitiveness.

Description

technical field [0001] The invention relates to an analysis and identification technology of fiber components, in particular to a method for identification of composite fibers. Background technique [0002] Composite fiber refers to a chemical fiber made of two or more polymers or similar polymers with different properties through composite spinning. It is a new type of physically modified fiber developed in the 1960s. With the wide application of composite fibers, the demand for the detection of its fiber components is increasing, but there is currently no qualitative analysis method for composite fibers, which has caused certain difficulties in the qualitative identification of testing institutions. [0003] The national mandatory standard GB5296.4-2012 "Instructions for Use of Consumer Products Textiles and Clothing Instructions" has mandatory requirements for fiber content labeling in the instructions for use of textiles, and the labeling requirements should be in accord...

Claims

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Application Information

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IPC IPC(8): G01N25/12
Inventor 罗峻胡剑灿谢剑飞杨欣卉李春燕杨昊明聂凤明
Owner GUANGZHOU FIBER PROD TESTING & RES INST
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