T/STTIA 005-2024 Active Group standards

T/STTIA 005-2024 High-quality knitted underwear

Publish Date: 2024-03-29 Implement Date: 2024-03-29 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/STTIA 005-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Textiles

Publish Date: 2024-03-29

Implement Date: 2024-03-29

Scope

Main Technical Content: T/STTIA 005-2024, *High-Quality Knitted Underpants*, is based on the national standard GB/T 8878-2023, *Knitted Underwear*. It adjusts certain provisions as follows: 1. **Fiber Content Requirements**: The standard adds a requirement that the elastane content in the fabric used must not be less than 5%. The elastane content in the fabric significantly affects the performance of underpants products. High elastane content leads to better performance, while low elastane content results in poorer performance. Based on industry practices, the standard sets a minimum elastane content of 5% to ensure high product quality. 2. **Dimensional Change Rate After Washing**: GB/T 8878-2023 stipulates that the dimensional change rate after washing is not evaluated for shorts, so this standard does not assess this parameter. 3. **Liquid Stain Resistance**: The standard adjusts the indicator for liquid stain resistance, which directly reflects the colorfastness of the product and has a significant impact on consumer experience. To improve overall product quality, the standard sets the liquid stain resistance indicator one grade higher than GB/T 8878-2023. 4. **Seamless Underpants Requirements**: Added requirements for adhesive peel strength and tensile elasticity recovery rate in seamless underpants. **Table 1: Seamless Underpants Quality Requirements** | Grade | First-Class | Passed | | --- | --- | --- | | Adhesive Peel Strength (a/N) | ≥10 | ≥80 | | Tensile Elasticity Recovery Rate (b/%) | ≥80 | a) Only the adhesive area is evaluated. b) The waistband and leg openings are evaluated. 5. **Oil and Stain Testing**: Added provisions for light and dark oil and stain testing. This helps enterprises pay attention to oil contamination during production and provides a basis for evaluating oil stains during product acceptance. 6. **Seamless Underpants**: Added a requirement that the adhesive at the seamless underpants' attachment