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Method for evaluating effectiveness of glass fiber coating and application thereof

An effective and coating technology, applied in the field of testing, can solve the problems of lack of glass fiber yarn and the effectiveness of sizing agents, and achieve the effects of stable testing results, enhanced monitoring, and rapid identification

Pending Publication Date: 2022-02-25
NANJING FIBERGLASS RES & DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that can quickly detect and judge the effectiveness of the glass fiber yarn coated with the sizing agent and the sizing agent during storage, thereby providing a method that can quickly detect and judge the effectiveness of the sizing agent. Method for Evaluating the Effectiveness of Fiberglass Coatings

Method used

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  • Method for evaluating effectiveness of glass fiber coating and application thereof
  • Method for evaluating effectiveness of glass fiber coating and application thereof
  • Method for evaluating effectiveness of glass fiber coating and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this embodiment, the infiltrant solution left open for 0-4 months is used for detection. Specifically, the solution of the finished sizing agent used in this embodiment is the water-based epoxy emulsion wetting agent BG7 (3178) produced by Nanjing Glass Fiber Research and Design Institute Co., Ltd., and the solution of the finished sizing agent has a solid content of about 5%. dilute solution.

[0040] Specifically, the finished infiltrant solutions that have been placed for different times are directly injected into the liquid pool for infrared detection, and infrared detection is performed to obtain infrared spectra of the infiltrant solutions at different open storage times. The detection instrument of infrared detection in the present embodiment is Thermo Scientific TM Nicolet TM For the iS20 FTIR spectrometer, the liquid pool used in the detection instrument is a detachable liquid pool with an optical path of 0.1mm, and the window of the detachable liquid po...

Embodiment 2

[0048] In this embodiment, the glass fiber that has been infiltrated with the same proportion of wetting agent solution as in Embodiment 1 and sealed and stored for a period of time is used for infrared detection. The specific process is:

[0049] Get 20g of glass fiber and join in the Soxhlet extractor, add 300mL of acetone in the Soxhlet extractor to extract and obtain the extract; directly inject the extract into the same infrared detection instrument in Example 1 to detect and obtain the infrared spectrum.

[0050] In this example, the glass fibers whose sealed storage time reaches 0.5 years, 1 year, 2 years, 2.5 years, 3 years and 4 years are respectively obtained, and the infrared spectrum of the sizing agent of 0 months in Example 1 is used as the standard spectrum. Obtain the ratio of the S1 / S2 of each graph according to the mode of embodiment 1, take the standard graph as a reference, and then obtain the epoxy retention rate and the 930cm -1 ~880cm -1 The correlati...

Embodiment 3

[0057] In this example, the same infiltrant solution was repeatedly injected into the liquid pool for infrared detection for three times for detection, and the infrared spectrum obtained for the first time was used as the standard spectrum to obtain the infrared spectrum obtained from the three detections and the infrared spectrum obtained from the first detection. The full-spectrum correlation coefficient and epoxy retention rate of the test results are shown in Table 3.

[0058] table 3

[0059] full spectrum correlation coefficient Epoxy Retention the first time 1 100％ the second time 0.9921 99.96％ the third time 0.9950 100％

[0060] It can be known from the test results in Table 3 that the consistency of the test results of the present application reaches more than 99%, and the test results are accurate and stable.

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Abstract

The invention discloses a method for evaluating effectiveness of a glass fiber coating and application thereof. The method comprises the following steps: treating a raw material solution: respectively obtaining a standard solution and a to-be-detected solution, wherein the to-be-detected solution is a solution of a to-be-detected impregnating compound finished product or a solution of a glass fiber surface impregnating compound obtained by solvent extraction; detection: directly injecting the standard solution and the to-be-detected solution into a liquid pool for infrared detection to obtain an infrared spectrum; evaluation: obtaining an absorbance value S1 at the position of an epoxy group absorption band and an absorbance value S2 at the position of a phenyl group absorption band according to the infrared spectrum; calculating the ratio B < standard > of S1 / S2 in the standard solution, calculating the ratio B < standby > of S1 / S2 in the to-be-detected solution, obtaining the epoxy retention rate of the to-be-detected solution according to the formula: epoxy retention rate = B < standby > / B < standard >, and evaluating the effectiveness of the glass fiber coating by adopting the epoxy retention rate. The method provided by the invention can accurately and quickly judge the effectiveness of the glass fiber coating.

Description

technical field [0001] The invention relates to the detection field, in particular to a method for evaluating the effectiveness of a glass fiber coating and an application thereof. Background technique [0002] The sizing product is a necessary coating during the production and processing of glass fibers. The lubricating and fiber-protecting functions of the sizing run through the entire process of wire drawing and fiber processing. The sizing can provide the characteristics required for further processing and application of glass fibers. Visible The sizing agent plays an extremely important role in the production of glass fiber. The quality of the sizing agent and the rationality of the formula will directly affect the quality and quality of the glass fiber yarn. [0003] Chinese patent application CN102564991A discloses a qualitative analysis method for glass fiber surface wetting agent, which performs infrared spectrum testing on all wetting agent raw materials, and estab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3577
CPCG01N21/3577
Inventor 丁林峰宋伟郭仁贤祖群奚秋香嵇跃云吴中华
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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