Rapid measuring method of fabric pH value

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 The invention discloses a method for quickly measuring the pH value of fabrics. Background technique 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. 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 temperature oscillating wat...

AI Technical Summary

Problems solved by technology

The above test method has many procedures, is time-consuming, requires the help of a pH tester, and has damage to the fabric

It is extremely inconvenient to apply in large-scale production, which is not conducive to rapid monitoring

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