How much do you know about the PH value of textile fabrics?
Recently, the Development Office of Nantong State Inspection and Quarantine Bureau detected a batch of textile products with unqualified pH value. A fabric products company in Nantong plans to export embroidered bed sheet sets to Egypt. In strict accordance with the requirements of the “Jiangsu Import and Export Light Textile Products Inspection and Supervision Work Specifications”, the inspectors of our bureau took representative samples of this batch of products in the factory warehouse and sent them to the laboratory. According to the “National Basic Safety Technical Specifications for Fabric Products” (GB18401-2010) Perform testing. The test result showed that the pH value was 3.8, which was outside the standard range. The PH value of fabrics refers to the residual acid and alkali content in the fabric. It is one of the limit indicators of harmful substances that affect human safety and health. The national standard GB18401-2010 “National Basic Safety Technical Specifications for Fabric Products” stipulates that the pH value of infants and fabric products that directly contact the skin should be controlled between 4.0 and 8.5, and the pH value of fabric products that do not directly contact the skin should be controlled between 4.0 and 9.0. , if the product needs to be wet treated in the subsequent finishing process, the pH value can be relaxed to between 4.0 and 10.5. The pH value of human skin is generally between 5.5 and 7.0, which is slightly acidic. Fabrics with excessive PH value will destroy the weakly acidic environment on the surface of human skin, cause itching, make the skin susceptible to other germs, and even cause symptoms such as dermatitis. In addition, if the pH value of fabrics is too high or too low, the fabrics will be easily damaged during storage. It can be seen that the PH value of fabric products is not only closely related to the health of consumers, but also inseparable from the quality of the fabric products themselves. There are many reasons why the pH value exceeds the standard. However, after the fabric is printed, dyed and finished, it is dried before leaving the factory without being fully washed, and at the same time, affirmative neutralization measures are not taken. This is the main reason for the unqualified pH value. In addition, inferior fabrics, etc. can also cause the pH value to exceed the standard. Therefore, the Nantong State Inspection and Quarantine Bureau reminds consumers that when purchasing fabric products, they must first read the information on the product tags and avoid purchasing low-quality and low-quality products. According to the classification of the “National Basic Safety Technical Specifications for Fabric Products”, fabric products can be divided into three safety levels: A, B, and C. That is, products for infants and young children (36 months and under) should meet the technical requirements of Class A products, and direct contact with Products on the skin should comply with the technical requirements of Category B products, and products that are not in direct contact with the skin should comply with the technical requirements of Category C products. It is best to purchase fabric products marked as “Category C” or “Qualified Product” with caution. Secondly, after buying new products, especially children’s, infant products, underwear and other fabric products that come into direct contact with the human body, do not wear them directly. It can be rinsed with clean water before wearing. This can effectively reduce harmful substances in fabric products and keep the pH value within the standard range.
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