Textile far infrared emissivity tester

The Textile Far-Infrared Emissivity Tester is a precision instrument designed to evaluate the far-infrared radiation properties of textile materials. It can measure fibers, yarns, fabrics, nonwovens, and finished textile products, providing critical data for product design, quality control, and performance optimization. This tester ensures accurate and reproducible measurements of far-infrared emissivity for both natural and synthetic fibers.

Application

Quality control and performance evaluation of natural fibers such as cotton and wool.

Assessment of synthetic fibers, including polyester, nylon, and blended yarns.

Measurement of far-infrared emissivity of woven, knitted, and nonwoven fabrics.

Evaluation of finished garments and functional textiles (heat-retaining, moisture-wicking).

R&D support for new fiber blends and smart textile development.

Compliance testing for international markets requiring thermal performance data.

Process optimization for textile manufacturing based on far-infrared performance.

Standards

GB/T 30127.4-2013: Determination of Far-Infrared Emissivity of Textile Materials (China)

ISO 18562-3:2017: Test methods for far-infrared properties of textiles

ASTM E1933: Standard Test Method for Measuring the Far-Infrared Emissivity of Materials

EN 14505: Clothing for protection against heat and flame — Measurement of thermal properties

ISO 11092: Textiles — Physiological effects — Measurement of thermal and water-vapour resistance

Features

(1) Sequential blackbody and sample measurement for accurate emissivity evaluation.

(2) Far-infrared spectral range 5–14 μm for comprehensive textile analysis.

(3) High-precision heating plate with temperature control ±0.5°C.

(4) Non-destructive testing method preserving sample integrity.

(5) Touchscreen interface with intuitive menu-based operation.

(6) Lock-in and microelectronic signal processing for detecting weak far-infrared radiation.

(7) USB and network interface for data export and software integration.

(8) Compact, lightweight design suitable for laboratory and R&D environments.

(9) Supports both natural and synthetic fibers, woven and nonwoven fabrics, and finished textile products.

Technical Parameters

Accessories

Certified standard blackbody reference panel

Thermal measurement plate

Far-infrared radiation measurement system

USB/network cable for data transfer

User manual and software for data acquisition

Optional calibration kit for verification of measurement accuracy

Test Procedures

Place the standard blackbody panel on the heating plate and set the desired temperature.

Sequentially place the textile sample on the heating plate after blackbody measurement.

Allow the sample to reach thermal equilibrium.

Measure the far-infrared radiation intensity of both the blackbody and sample.

Calculate the far-infrared emissivity as the ratio of sample radiation to the blackbody radiation.

Record and analyze results using the software interface.

Repeat measurements as necessary for different sample types or temperatures.

Maintenance Information

Clean blackbody and thermal plates regularly to maintain measurement accuracy.

Periodically calibrate the far-infrared measurement system using certified reference materials.

Inspect the heating plate, sensors, and electronics for wear or damage.

Keep the instrument in a dry, dust-free environment to prevent interference or damage.

Ensure software and firmware are updated for optimal performance.

Avoid mechanical shocks to maintain sensor precision.

FAQ

1. Why is the test temperature set specifically at 34°C?

34°C represents the average surface temperature of human skin. Since many far-infrared textiles are designed for "passive heating" by reflecting body heat back to the wearer, testing at this temperature provides the most realistic simulation of actual use.

2. Can this tester distinguish between different types of far-infrared additives?

While the tester measures the total emissivity of the material, it does not identify the chemical composition. However, you can use it to compare the effectiveness of different concentrations of ceramic or mineral additives in your fiber blends.

3. Does the color of the fabric affect the emissivity measurement?

In the visible spectrum, color matters; however, in the far-infrared spectrum (5–14 μm), the physical structure and material composition are the dominant factors. You may find that two fabrics of different colors but identical composition have very similar emissivity values.

4. How does "emissivity" relate to "heat retention"?

High emissivity in the far-infrared range generally indicates that the material is efficient at absorbing and re-radiating thermal energy. For textiles, this usually translates to better thermal regulation and perceived warmth for the wearer.

5. Is there a minimum sample size required for an accurate test?

The heating plate is Φ60 mm. Your sample should be large enough to completely cover this plate (at least 70 x 70 mm) to ensure that the sensor only detects radiation from the textile and not the surrounding air or equipment.