Many people know that the content of melamine in milk exceeds the standard, the formaldehyde content in the room decoration exceeds the standard, and the automobile exhaust exceeds the standard, which will cause harm to the human body. However, few people will think that the clothing that is intimately in contact with us every day is also wearing harmful substances. Residue. Maybe we have a certain understanding of the formaldehyde content of the clothing, but we do not think that the clothing will have a pH limit, there will be a pH control index!
What is the PH value? What is the role of flame retardant fabric pH in our textiles? How much does the PH value of the flame retardant cloth not endanger human health?
We know that the pH value of the flame retardant cloth is a quantitative representation of the degree of acid and alkali and is used to indicate the pH of the substance. The more the PH value of the flame retardant cloth tends to 0, the weaker the acidity of the solution. Conversely, the more tends to 14 the stronger the alkali of the solution. At normal temperature, the solution with pH=7 is a neutral solution. The surface of human skin is slightly acidic (pH between 5.5 and 6.5) to ensure the balance of resident bacteria and prevent the invasion of pathogenic bacteria. Similarly, clothing also has a PH value, the pH value of the clothing is beneficial to the human body in the slightly acidic and neutral areas; if the acid and alkali of the clothing is improper, it will cause the natural barrier of the skin surface to be destroyed, irritate the skin, and breed bacteria. , causing disease. In accordance with the national mandatory standard "National Textile Products Basic Safety Technical Specifications", infants and young children's products (A products) and products that directly contact the skin (B products) have a pH of 4.0-7.5, which is not in direct contact with skin products ( Class C products have a pH of 4.0 to 9.0.
Why is there a shortage of acid and alkali in clothing?
Apparel fabrics need to use various dyes and auxiliaries in dyeing and finishing. If the washing is not enough after dyeing and finishing, they will be dried and shipped out; or some neutralization measures are not taken; in the later stage, there is no corresponding detection means, which will inevitably result in The acidity and alkalinity of textiles is improper.
How do consumers protect themselves from excessive UV values?
When purchasing clothing, don't trust the old method of “look at the second smell”. Because of this method, the PH value of the flame retardant cloth is difficult to find, but when paying attention to the color, style, texture and price of the clothing. More attention should be paid to the safety of clothing; purchase products produced by regular manufacturers as much as possible, and indicate the products that meet the national safety technical specifications in the instructions for use; if necessary, ask the dealer for a test report to see if it meets the above-mentioned national standards. Relevant regulations; for clothing that can be washed, especially for infants and young children, soaking and rinsing before wearing, the washing method can improve the PH value of the flame retardant fabric of the garment.
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