What are the textile quality inspection items

Generally common testing products are divided into four categories:

 

　　 1. Household appliances are tested according to the GB4706 standard

 

　　 2. AV audio and video GB8898 standards for testing

 

　　3. IT information technology category GB4943 standards for testing

 

　　 4. LED lamps and lanterns are tested according to the GB7000 standard

 

　　 The conventional test items are: fiber content, pH value, formaldehyde content, decomposable carcinogenic aromatic amine dyes, color fastness.

 

　　Fiber content

 

　　, as the name suggests, is to detect the fiber composition and content of textile raw materials. The fiber content of the raw materials will directly affect the quality of the finished product. Therefore, the fiber content is the most basic and important item in textile testing.

 

　　PH

 

　　 In the textile printing and dyeing process, the dyes are more or less not fully washed or neutralized, resulting in excessive acid and alkali on the fabric, which exceeds the pH value of human skin, which can easily cause skin itching, allergies, inflammation and other diseases, affecting human health. In order to improve the safety performance of textiles, the pH value is also an important indicator. The national mandatory standard GB 18401-2010 "National Basic Safety Technical Code for Textiles" has clear provisions:

 

　　Formaldehyde content

 

　　In the production of fabrics, in order to achieve the effects of anti-wrinkle and shrink-proof, or to maintain the durability of printing and dyeing, or to improve the feel, it is necessary to add formaldehyde to the auxiliary agent. Textiles containing formaldehyde will gradually release free formaldehyde when people wear and use them, which will endanger the health of the wearing people. Therefore, the content of formaldehyde is also one of the important indicators for textile testing.

 

　　 can decompose carcinogenic aromatic amine dyes

 

　　 refers to dyes synthesized from carcinogenic aromatic amines, that is, people often say "banned azo dyes". For textile safety indicators, decomposable aromatic amines are far more toxic and carcinogenic than formaldehyde. Because formaldehyde has a pungent odor, it is easy to distinguish, and it is easily soluble in water. After consumers buy textiles, they usually wash with water to remove most of the formaldehyde; but after decomposable aromatic amine dyes are made into clothes, they are not only insoluble in water, Moreover, it is colorless and odorless, indistinguishable from the appearance of textiles. It can only be discovered through technical inspection and cannot be eliminated. After this dye comes into contact with human skin, it can cause a variety of malignant diseases, absorb and cause cancer. Therefore, the importance of detecting decomposable carcinogenic aromatic amine dyes can be imagined.

 

　　 color fastness

 

　　Dyes are affected by various external factors in the use or after dyeing and finishing of dyed fabrics, whether they can maintain the original color and luster. The fastness grade is evaluated according to the discoloration of the sample and the staining of the undyed lining fabric.

 

　　 Conventional color fastness includes: color fastness to soaping, color fastness to water, color fastness to perspiration, color fastness to rubbing, color fastness to light, color fastness to light, color fastness to perspiration. The general color fastness (except light fastness) has 5 grades, 1 is the worst, and 5 is the best; there are 8 light fastness, 1 is the worst, and 8 is the best.

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