Samples of 4 batches of 20 batches of textile fabric products in the Guangzhou circulation field did not meet the standard requirements
On September 8, 2021, the Guangzhou Municipal People’s Government website released the results of the quality supervision and spot inspection of textile fabric products in Guangzhou’s circulation field in the second quarter of 2021. In the second quarter of 2021, the Guangzhou Municipal Administration for Market Regulation conducted supervision and random inspections on the quality of textile fabric products in the circulation field. A total of 20 batches of samples were randomly inspected. After inspection, 4 batches of samples did not meet the standard requirements.
This spot check is based on GB 18401-2010 “National Basic Safety Technical Specifications for Textile Products”, GB/T 29862-2013 “Identification of Textile Fiber Content” standards and relevant laws, administrative regulations, departmental rules and normative documents. Currently effective corporate standards, group standards, local standards and product express quality requirements, the fiber content, formaldehyde content, pH value, decomposable carcinogenic aromatic amine dyes, color fastness to water, color fastness to perspiration, and resistance to textile fabric products Seven items including dry rubbing color fastness were assessed.
Main unqualified items and situation analysis
1. Fiber content
Fiber content is one of the important quality indicators of textile fabrics. The quality of raw material components is an important factor in determining the value of fabric products. When consumers choose fabrics, they often choose based on the fiber content. If the fiber content is not marked or is incorrectly marked, it will directly affect consumers’ choice of fabrics. In this spot check, 4 batches of products had unqualified fiber content, that is, the fiber content marked or declared on the product was inconsistent with the actual measured value, or the fiber content exceeded the standard tolerance range. Three of the fabrics were all nominally 30% cotton, and the actual measured values were all 30%. Viscose fiber and polyester fiber, these 3 batches are all products operated by individual industrial and commercial households; 1 batch of fabrics is nominally 95% mulberry silk, spandex5%, and the actual measured mulberry silk 100%, this batch is an enterprise product. The main reason for the unqualified fiber content this time is that individual industrial and commercial households have weak awareness of product quality and lack of professional and technical knowledge. In addition, 6 batches of samples in this random inspection failed to provide fiber content, resulting in the report not determining the fiber content of the samples. The reasons are as follows: First, the companies that do not provide fiber content are individual industrial and commercial households and lack awareness of product quality. Second, the supervision of relevant market operators and the promotion and guidance of product quality still need to be strengthened.
2. Color fastness items
In this color fastness spot check, the color fastness to water and color fastness to perspiration were found to be unqualified. Failure to pass the color fastness item will seriously affect the appearance and performance of the clothing. On the other hand, dyes on clothing can easily transfer from textiles to human skin through sweat. Dye molecules and heavy metal ions may be absorbed by the human body through human skin. endanger human health.
Water-resistant color fastness reflects the discoloration of the textile itself and the staining of the adjacent fabric under the combined action of a certain amount of moisture, pressure and temperature. In this random inspection, one batch of products failed to meet the water fastness standards. GB 18401-2010 requires discoloration and staining of Category C products ≥3. The actual staining of mulberry silk failed, with a staining of 2-3. The color fastness to perspiration is the color fastness of simulated textiles to artificial perspiration. The composition of human sweat is complex. The main component is salt, which varies from person to person. Sweat can be acidic or alkaline. In this spot check, 2 batches of products failed to meet the standards for color fastness to perspiration. GB 18401-2010 requires discoloration and staining of Category C products ≥ 3. One batch of products (fabric fiber content is 100% mulberry silk) did not stain mulberry silk. Qualified, the actual measurement is: 2-3 (acid sweat), 2 (alkaline sweat); 1 batch of products (fabric fiber content is 59.5% polyester fiber, viscose fiber 40.5%) viscose fiber staining is unqualified, the actual measurement is: 2 (acidic sweat), 2 (alkaline sweat). Mulberry silk is a protein fiber and can only be dyed with acid dyes and reactive dyes. The combination of dyes and fibers is mainly ionic bonds, and the fastness is not strong. The chemical composition of viscose fiber is similar to that of cotton, so it is more resistant to alkali but not acid. However, its alkali and acid resistance are worse than cotton. Ordinary viscose fiber also has the disadvantage of poor color fastness. In addition to the unqualified color fastness caused by the fabric itself, when there are too many dyes on the surface of the fabric that are not stably combined with the fibers and float; some additives added during dyeing and post-processing are not removed after dyeing; during the dyeing process The retarder added in the dye will not only play a leveling role, but also weaken the binding force between the dye and the fiber, which will also lead to substandard color fastness.
AAA
Disclaimer:
Disclaimer: Some of the texts, pictures, audios, and videos of some articles published on this site are from the Internet and do not represent the views of this site. The copyrights belong to the original authors. If you find that the information reproduced on this website infringes upon your rights and interests, please contact us and we will change or delete it as soon as possible.
AA
