Rapid measuring method of fabric pH value

A rapid determination and fabric technology, which is applied in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, can solve the problems of inconvenient application, many processes, and unfavorable rapid monitoring, etc. good accuracy

Active Publication Date: 2008-10-08
传化智联股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above test method has many procedures, is time-consuming, requires the help of a pH tester, and has damag...

Method used

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  • Rapid measuring method of fabric pH value
  • Rapid measuring method of fabric pH value
  • Rapid measuring method of fabric pH value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Weigh 1.6g of phenolphthalein indicator, 0.9g of bromothymol blue indicator, 0.4g of methyl red indicator, and 0.2g of thymephenolphthalein indicator and dissolve them completely in 1L of ethanol (about 95% by mass) , to get a mixed indicator, adjust it with 0.1mol / L NaOH until the solution turns green. Put the above solution in a brown glass bottle for later use. Weigh 50 grams of Yuanming powder, dissolve it in 1L of deionized water, and place the extract in a brown glass bottle for later use. Put the filter paper under the fabric to be tested, then drip the extract on the surface of the fabric, press the dripping place with your fingers for 5 times, then add the mixed indicator dropwise at the same dripping place, after the color develops for 5-10s, according to the filter paper The color change judges the pH of the fabric.

Embodiment 2

[0021] Example 2: Weigh 1.0g of phenolphthalein indicator, 0.9g of bromothymol blue indicator, 0.4g of methyl red indicator, and 0.2g of thymolphthalein indicator and dissolve them completely in 1L of ethanol (about 95%) to obtain a mixed indicator agent, adjust it with 0.1mol / L NaOH until the solution turns green. Put the above solution in a brown glass bottle for later use. Weigh 50 grams of table salt, dissolve it in 1L of deionized water, and place the extract in a brown glass bottle for later use. Put the filter paper under the fabric to be tested, then drip the extract on the surface of the fabric, press the dripping place with your fingers for 5 times, then add the mixed indicator dropwise at the same dripping place, after the color develops for 5-10s, according to the filter paper The color change judges the pH of the fabric.

Embodiment 3

[0022] Embodiment 3: Take by weighing 1.0g of phenolphthalein indicator, 1.1g of bromothymol blue indicator, 0.4g of methyl red indicator, and 0.3g of thymolphthalein indicator and dissolve them completely in 1L of diethylene glycol (about 95%) to obtain Mix the indicator and adjust it with 0.1mol / L NaOH until the solution turns green. Put the above solution in a brown glass bottle for later use. Weigh 80 grams of magnesium chloride, dissolve it in 1L of deionized water, and place the extract in a brown glass bottle for later use. Place the filter paper under the fabric to be tested, then drip the extract on the surface of the fabric, and press the dripping place with your fingers for 5 times, then add the mixed indicator dropwise at the same dripping place, after the color develops for 5-10s, according to the filter paper The color change judges the pH of the fabric.

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PUM

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Abstract

The invention discloses a quick determination method for PH value of a textile. Prior determination method has too many working procedures, and wastes time, and hurts the textile because of using a PH determination device. Extreme inconvenience is existent in production application, which is not benefit for quickly monitoring. The invention has flowing the steps that: filter paper is set under the textile which is to be determined, and extraction liquid is dropped in the textile surface, then force application is affected to the position of dropping the extraction liquid, and the extraction liquid permeates into the filter paper through the textile, afterwards, a mixed indicator is dropped on the position of dropping the extraction liquid, after color development, PH value is quickly determined through color in the filter paper, the mixed indicator includes phenothalin indicator, bromothymol blue indicator, methyl red indicator and thymol phenothalin indicator. The invention can determine the textile PH value which changes from 3.0 to 11.0 by application of complementary color in the mixed indicator under the condition of different acidity-basicity of indicator, therefore, the quick, simple, high accuracy determination for the textile PH value is achieved.

Description

technical field [0001] The invention discloses a method for quickly measuring the pH value of fabrics. Background technique [0002] In the latest version of Oeko-Tex Standard 100 released by the International Textile Ecological Research and Inspection Association on February 9, 2002, it is mentioned that the pH value control range of textiles is: 4.0-7.5 for infants, 4.0-7.5 for direct contact with skin, Not in direct contact with the skin is 4.0-9.0, decorative materials are 4.0-9.0; for products that must be wet-treated in subsequent processing, the allowable pH value is between 4.0-10.5. Leather, coated or laminated composite products for upholstery materials, which allow a pH value between 3.5-9.0. [0003] At present, the pH value of fabrics is generally tested according to standard methods such as AATCC 81, ISO 3071, and GB / T 7573. Before the test, the sample needs to be cut into pieces and equipped with corresponding test equipment, including pH meter, constant tem...

Claims

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Application Information

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IPC IPC(8): G01N21/80
Inventor 陈利丽许卫琴高慧莲赵梅兰淑仙
Owner 传化智联股份有限公司
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