Focused on industry pain points and customer quality issues, GTTC provides professional quality technical consulting services. In the past ten years, GTTC has resolved about 6,000 cases of complaints and consultations from enterprises, shopping malls, and consumers. GTTC has issued more than 800 consultation opinions and quality technical consultation reports. Thanks to the accumulation of technical consulting data for many years, GTTC has established a complete analysis library for quality cases, which covers the issues of implementation standard, pilling, abrasion resistance, sewing damage, broken jean crotch, yellowing, redden due to light-perspiration, penetration of down, penetration of spandex, fibrillation of lyocell fiber, and etc. GTTC accurately identifies quality risks for enterprise products, and provides solutions for corresponding problems.

With the technical support of three national quality inspection centers including the National Textile and Apparel Product Quality Inspection Center (Guangzhou), the National Leather Products Quality Inspection Center (Guangdong), and the China Industrial Textile Industry Testing Center (Guangdong), GTTC has established the "Product Hospital" which is a new and convenient service platform for smart diagnosis and treatment. GTTC adopts the method of "looking, listening, asking, and feeling the pulse" and "pulse examination". GTTC creates the service model of "consultation and treatment" for quality safety. GTTC provides quality diagnosis and treatment services tailored to the need of enterprises in the industrial chain for textile, mask, epidemic prevention and other products. Moreover, GTTC assists companies in formulating plans and strategies for product quality improvement, and helps companies control product quality.

According to the company's feedback that shirts have local damage and are rotten after being stored for some time, we analyzed the cause for this problem. We found that the pH value of the fabric was low and a large amount of chloride ions appear, as a result of which, the residual or generated acidic chemicals corroded the fabric and caused damage.

Targeted solutions/prevention plans: (1) Avoiding using strong acids to adjust the pH value of the fabric; (2) Avoiding using strong oxidizing substances for the after-finishing; (3) Neutralizing or rinsing the fabric to ensure that there is no residue before putting it to use, if the above two kinds of substances have been used.

According to the company’s feedback that the uppers of the white travelling shoes have turned yellow after being displayed in the exhibition hall for a period of time, we analyzed the possible reasons for this problem. We found that when the polyurethane materials and/or white thermoplastic rubber materials of the sample shoes were exposed to light radiation in the indoor warm and humid indoor environment in the exhibition hall, the components in glue siphoned and migrated, and then plasticizers, oils and other small molecular solvents in the shoes migrated to the surface of the shoes, resulting in yellowing of the uppers of the shoes.

Targeted solutions/prevention plans:

1. The yellowing resistance testing method of shoes can be applied in the evaluation of the yellowing of white or light colored shoe materials. However, the phenol yellowing phenomenon of textiles has not been assessed yet, so the phenol yellowing evaluation of raw materials can be supplemented;

2. Environmental friendly adhesives or water-based adhesives should be used as much as possible, and TPU should not be used together with white flyknit. The raw materials of shoes parts should be selected from anti-oxidation and anti-phenol yellowing materials.