Functional textiles mean that in addition to the basic physical properties of conventional textile products, they also have some special functions that conventional textile products do not have. In recent years, various functional textiles have emerged one after another. This article summarizes the assessment standards and evaluation indicators of eight types of functional textiles.
1 Moisture absorption and quick-drying performance
To assess the performance indicators of textiles’ moisture absorption and quick-drying capabilities, the national standard has two evaluation standards: “GB/T 21655.1-2008 Evaluation of moisture absorption and quick-drying properties of textiles – Part 1: Single combination test method”, “GB/T 21655.2-2019 Evaluation of moisture absorption and quick-drying properties of textiles Part 2: Dynamic moisture transfer method. Enterprises can choose appropriate assessment standards based on the characteristics of their products. Regardless of whether the single combination method or the dynamic moisture transfer method is chosen, textiles must pass various moisture absorption and quick-drying performance indicators before and after washing before they can be claimed to have moisture absorption and quick-drying properties.
2 Waterproof performance
Anti-water: “GB/ T 4745-2012 Testing and Evaluation of Water Resistance of Textiles – Water Resistance Method” is a method for testing the water repellency of textiles. The standard divides the anti-wetting grade into levels 0-5. Level 5 means that the textile has excellent anti-wetting properties. Level 0 means that the textile has no anti-wetting properties. The higher the level, the better the fabric’s anti-wetting effect.
Anti-hydrostatic pressure performance: Anti-hydrostatic pressure performance simulates the waterproof performance of textiles in heavy rain environments. The testing method used in the national standard is “GB/T 4744-2013 Hydrostatic pressure method for detection and evaluation of waterproof performance of textiles”. The standard stipulates that the anti-hydrostatic pressure capability of textiles is not less than 4kPa, which means it has anti-hydrostatic properties, not less than 20kPa, which means it has good anti-hydrostatic properties, and not less than 35kPa, which means it has excellent anti-hydrostatic properties. “GB/T 21295-2014 Technical Requirements for Physical and Chemical Properties of Clothing” stipulates that the rainproof function must be achieved, the hydrostatic pressure resistance shall not be less than 13kPa, and the rainstorm resistance shall not be less than 35kPa.
3 Oil repellency
It is more commonly used in oil-proof and anti-fouling functional clothing. Woven textiles can refer to the technical requirements in “GB/T 21295-2014 Technical Requirements for Physical and Chemical Properties of Clothing” and conduct tests according to the method standard “GB/T 19977-2005 Textile Oil Repellency and Hydrocarbon Resistance Test” to achieve oil repellency. The level is not less than level 4. Other types of textiles can refer to or customize requirements.
4 Easy decontamination performance
Woven textiles can refer to “GB/T 21295- According to the technical requirements in “Technical Requirements for Physical and Chemical Properties of Clothing 2014”, the test is carried out in accordance with the method standard “FZ/T 01118-2012 Detection and Evaluation of Anti-fouling Properties of Textiles and Ease of Decontamination”, and the decontamination level is not less than level 3-4. (Original whitening and bleaching can be reduced by half a level).
5 Anti-static performance
Many like to use winter clothes Anti-static textiles are used as fabrics, and there are many standard methods for assessing electrostatic performance. Product standards include “GB 12014-2019 Protective Clothing Anti-static Clothing”, “FZ/T 64011-2012 Electrostatic Flocking Fabrics”, “GB/T 22845″ -2009 Anti-static Gloves”, “GB/T 24249-2009 Anti-static Clean Fabrics”, “FZ/T 24013-2020 Durable Anti-static Cashmere Knitwear”, etc. Method standards include GB/T “12703.1-2008 Evaluation of electrostatic properties of textiles Part 1: Electrostatic voltage half-life”, “GB/T 12703.2-2009 Evaluation of electrostatic properties of textiles Part 2: Charge area density”, “GB/T 12703.3 -2009 Evaluation of electrostatic properties of textiles Part 3: Charge amount》etc. Enterprises commonly use 12703.1 to assess the electrostatic half-life of textiles to evaluate the grade of the fabric, which is divided into Grade A, Grade B and Grade C.
6 UV protection
《GB/T 18830- “Evaluation of UV Protection Performance of Textiles 2009” is the only national method standard for testing the UV protection performance of textiles. The standard stipulates the test methods for the solar UV protection performance of textiles, the expression, evaluation and labeling of the protection level. The standard stipulates that “when the sample’s UPF>40 and T(UVA)AV<5%, it can be called an anti-UV product."
7 Insulation Performance
FZ/T 73022-2019 “Knitted Thermal Underwear” requires a thermal insulation rate of more than 30%. The method standard quoted is GB/T 11048-1989 “Thermal Insulation Performance of Textiles” experiment method”. If it is thermal underwear, you can choose this standard for testing. If it is other textiles, since GB/T 11048-1989 has been invalidated, you can follow the new version of standard GB/T11048-2018 to assess the Crow value and thermal resistance, and evaluate the thermal resistance, heat transfer coefficient, Crow value, and thermal insulation rate in accordance with “GB/T 35762-2017 Textile Thermal Transfer Performance Test Method Flat Method”.
8 Non-iron textiles
Shirts, dress skirts and other products It is required to have non-iron performance to facilitate consumers’ daily maintenance. “GB/T 18863-2002 Non-iron Textiles” mainly assesses the appearance of flatness after washing, the appearance of seams, the appearance of pleats, etc. </p
