FTTS-FA-019 Cool Feeling Textiles: Understanding Standards and Testing Methods

Fabric Cool Feeling Tester

The demand for comfortable textiles that provide a cooling sensation has surged, particularly in response to consumer preferences for functional fabrics in hot weather. The FTTS-FA-019 standard, developed by the Committee for Conformity Assessment of Accreditation and Certification on Functional and Technical Textiles, provides a framework for evaluating the cool feeling properties of textiles. This article delves into the scope, definitions, quality standards, and testing methods outlined in FTTS-FA-019.

1. Applicable Scope of FTTS-FA-019

FTTS-FA-019 Cool Feeling Textiles, FTTS-FA-019 applies to the testing of cool-feeling textiles, focusing on their ability to achieve a temperature drop upon contact with the skin. This standard encompasses both finished products and semi-finished textiles, allowing manufacturers to assess whether their materials meet the necessary cooling requirements. The standard is essential for ensuring that textiles marketed as “cooling” perform as expected under real-world conditions.

2. Key Definitions

A critical term defined in FTTS-FA-019 is Q-max, which represents the maximum heat loss per unit area (measured in W/cm²) when a textile comes into contact with human skin. This index serves as a benchmark for evaluating the cooling sensation provided by different fabrics. The higher the Q-max value, the greater the cooling effect perceived by the wearer.

3. Quality Standards

FTTS-FA-019 establishes specific quality benchmarks for different types of fabrics:

  • Knit Fabrics: Must achieve a Q-max value of at least 0.130 W/cm².
  • Woven Fabrics: Must achieve a Q-max value of at least 0.170 W/cm².

These standards ensure that only textiles with significant cooling properties are classified as cool feeling fabrics.

3.1 Washability Requirements

To maintain their cooling properties after washing, textiles must undergo specific tests according to CNS 15140. For knit fabrics, a wash cycle following method 8B is required, while woven fabrics must adhere to method 7B. Each type of fabric should withstand five washes in water to ensure durability without losing its cooling effect.

4. Testing Methods

The FTTS-FA-019 standard outlines various methods for assessing the cool feeling properties of textiles:

4.1 Sample Preparation

Testing begins with preparing five samples of fabric, each measuring 20 cm x 20 cm, although the actual tested area is limited to 5 cm x 5 cm. These samples must be acclimatized in an environment set at 20±2°C and 65±2% relative humidity for approximately 24 hours before testing.

4.2 Test Environment Setup

The testing environment must be controlled according to CNS 5611 standards, ensuring consistent conditions that mimic real-life usage scenarios.

4.3 Instrumentation

The recommended testing instrument is the KES-F7 THERMO LABO II or an equivalent device capable of accurately measuring temperature changes during contact between the fabric and a thermal test plate.

4.4 Test Procedure

  1. Preparation: Turn on the Thermo Labo II and allow it to warm up for about 15 minutes after confirming parameters.
  2. Temperature Setting: Set the temperature box to 35.0±0.1°C and switch on the guard heater once this temperature is reached.
  3. Measurement: Place the fabric sample in contact with a heated plate and record temperature changes over time to determine the Q-max value.

5. Additional Testing Methods

In addition to those specified in FTTS-FA-019, other methods can be employed to evaluating cool feeling textiles:

5.1 Direct Temperature Sensor Method

This method involves using a direct temperature sensor to measure how well a fabric absorbs moisture and conducts heat away from the skin. The procedure includes drying samples at 70°C and then placing them in a controlled chamber before applying water at body temperature (35°C). The sensor records temperature changes over time, providing data on how long the fabric remains cool.

5.2 Human Body Try-On Method

This subjective method involves wearing the fabric to evaluate its cooling effect based on personal experience. While this approach reflects real-world usage, it can be influenced by individual perceptions and environmental factors.

6. Importance of FTTS-FA-019 Standard

The FTTS-FA-019 standard plays a crucial role in ensuring that consumers receive high-quality cooling textiles that meet their expectations for comfort during hot weather conditions. By adhering to this standard, manufacturers can confidently market their products as effective cooling solutions while maintaining transparency regarding their performance characteristics.

7. Conclusion

In summary, FTTS-FA-019 provides a comprehensive framework for testing and evaluating cool-feeling textiles based on scientifically established criteria such as Q-max values and washability requirements. By utilizing standardized testing methods, manufacturers can ensure their products deliver genuine cooling sensations, thereby enhancing consumer satisfaction and trust in functional textiles designed for comfort in warm climates. As demand for such fabrics continues to grow, adherence to standards like FTTS-FA-019 will be essential for maintaining product quality and performance in the competitive textile market.

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