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Method for analyzing glass fiber in paper

A technology of glass fiber and analysis method, which is applied in the analysis field of glass fiber in paper, can solve the problems of separation, expensive equipment, difficulty, etc., and achieve the effect of good analysis effect, low application cost and easy operation

Active Publication Date: 2010-06-09
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In my country, there are no reports and relevant standards on the analysis of glass fibers in paper. In recent years, some documents have indicated that some researchers have used the calcining method; polycrystalline X-ray diffraction method to conduct similar analysis, but use There are great difficulties in the analysis of glass fibers in paper
Calcination method: After the cigarette paper is burned out, the sample ash still contains some inorganic salts, such as SiO 2 , CaO, Al 2 o 3 Substances such as potassium salt and potassium salt cannot be separated from short glass fibers, especially when there are some glass fiber substitutes, the test cannot be carried out; polycrystalline X-ray diffraction method: due to the extremely expensive and high operating costs of this instrument, the general enterprise and quality It is difficult for the supervisory department to configure such instruments and equipment, and it cannot be promoted and used in enterprises

Method used

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  • Method for analyzing glass fiber in paper

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this embodiment, the glass fiber in the paper is analyzed, and the sample used is a sample paper with known content (glass fiber content: 0.13%).

[0019] Instruments used: muffle furnace, oven, integrated filter (including: glass crucible (with sand core, specification: 40-60μm), water flushing vacuum pump, fixed bracket, etc.)

[0020] Concentrated acid solution: concentrated hydrochloric acid, 12mol / L

[0021] Deionized water

[0022] Analysis steps:

[0023] Weigh 6.2024g paper sample.

[0024] After being ignited, let it burn out, and move all the ash into a glass crucible (crucible weight: 29.4173g).

[0025] Calcined in a muffle furnace at 500°C for 8h, and cooled to room temperature naturally in the muffle furnace.

[0026] Rinse the sample ash residue with 50ml / L concentrated hydrochloric acid three times, soak in concentrated hydrochloric acid for 1 hour, then filter and rinse with deionized water.

[0027] Put it in an oven at 120°C for 2 hours, take ...

Embodiment 2

[0030] In this embodiment, the glass fiber in the paper is analyzed, and the sample used is a cigarette-like paper with known glass fiber content (glass fiber content: 1.25%) and other partially acid-soluble fiber content.

[0031] Instruments used: muffle furnace, oven, integrated filter (including: glass crucible (with sand core, specification: 40-60μm), water flushing vacuum pump, fixed bracket, etc.)

[0032] Concentrated acid solution: concentrated hydrochloric acid, 12mol / L

[0033] Deionized water

[0034] Analysis steps:

[0035] Weigh 6.5526g paper sample.

[0036] After being ignited, let it burn out, and move all the ash into a glass crucible (crucible weight: 29.7178g).

[0037] Calcined in a muffle furnace at 500°C for 8h, and cooled to room temperature naturally in the muffle furnace.

[0038] Observed with a polarizing microscope, it was found that other fibers were present at the same time.

[0039] Rinse the sample ash residue with 50ml / L concentrated hyd...

Embodiment 3

[0043] In this embodiment, the glass fiber in the paper is analyzed, and the sample used is a sample paper with known content (glass fiber content: 0.48%).

[0044] Instruments used: muffle furnace, oven, integrated filter (including: glass crucible (with sand core, specification: 40-60μm), water flushing vacuum pump, fixed bracket, etc.)

[0045] Concentrated acid solution: concentrated nitric acid, 16mol / L

[0046] Deionized water

[0047] Analysis steps:

[0048] Weigh 6.6898g paper sample.

[0049] After being ignited, let it burn out, and move all the ash into a glass crucible (crucible weight: 30.0802g).

[0050] Calcined in a muffle furnace at 500°C for 8h, and cooled to room temperature naturally in the muffle furnace.

[0051] Rinse the sample ash with 50ml / L concentrated nitric acid three times, soak in concentrated nitric acid for 1 hour, then filter and rinse with deionized water.

[0052] Put it in an oven at 120°C for 2 hours, take it out and put it in a dry...

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Abstract

The invention discloses a method for analyzing glass fiber in paper, which sequentially comprises the steps of: burning out a paper sample; putting into a muffle furnace to calcine; naturally cooling into room temperature in the muffle furnace after calcining; putting the sample into a micro-light microscope to observe; judging whether the other fibers are existed; if the other fibers are not existed, soaking and washing with concentrated hydrochloric acid or concentrated nitric acid, washing to be clean with deionized water, drying, cooling, and weighing; and if the other fibers are existed, soaking and washing with the concentrated hydrochloric acid or the concentrated nitric acid, washing to be clean with the deionized water, drying, and analyzing with the fourier transform infrared spectroscopy to test the content of the glass fiber.

Description

technical field [0001] The invention relates to a method for analyzing glass fibers in paper. Background technique [0002] In my country, there are no reports and relevant standards on the analysis of glass fibers in paper. In recent years, some documents have indicated that some researchers have used calcination method; polycrystalline X-ray diffraction method to carry out similar analysis, but used There are great difficulties in the analysis of glass fibers in paper. Calcination method: After the cigarette paper is burned out, the sample ash still contains some inorganic salts, such as SiO 2 , CaO, Al 2 o 3 Substances such as potassium salt and potassium salt cannot be separated from short glass fibers, especially when there are some glass fiber substitutes, it cannot be tested; polycrystalline X-ray diffraction method: due to the extremely expensive and high operating costs of this instrument, general enterprises and quality It is difficult for supervisory department...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N1/34G01N5/04
Inventor 郭小义范红梅金勇银董红赵立红陈潜
Owner CHINA TOBACCO HUNAN INDAL CORP
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