At CTT Group, physical testing is grouped into four main categories: dimensional testing, manufacturing characterization, thermophysical characteristics and optical properties.
This category includes tests that concern the dimensions and dimensional variations of a material. Our most common tests can measure:
- The thickness of a membrane, the coating of a textile (with or without pressure);
- The compression factor of a material under pressure;
- The density of a material;
- The dimensional stability of a material (under heat, moisture or both);
This category concerns the nature of the material. Manufacturing tests can be used to analyze the defects of a material, or to characterize the products of a supplier. They are used to evaluate or measure such things as:
- The context (e.g., the number of threads per inch of a fabric);
- The type of weaving (the weave) or knit (binding);
- The type of yarn;
As its name indicates, thermophysical testing concerns the reactions of a textile or geosynthetic material subjected to various thermal constraints. At CTT Group, we perform some unique tests in the industry to measure the thermal properties of finished products, using a thermal head (toques, hoods), a thermal hand (gloves) and a thermal foot (boots). Other common tests include:
- Melting, crystallization, glass transition temperature analysis (ASTM D3418);
- Coefficient of thermal expansion (ASTM E831 or ASTM D696);
- Thermal conductivity and effusivity (ASTM D7984);
- Thermal resistance, cold insulating capacity, CLO value (ISO 11092, ASTM F1868);
Tests that address the optical properties of a textile or geosynthetic material are used to evaluate the color (ASTM E308 or E1164), brightness (ASTM D523 or ISO 2813), solar reflectance (ASTM E424), or retroreflectivity of a material (ASTM E809 for retroreflective strips on ANSI/ISEA 107 and CSA Z96 safety vests, for example). At CTT Group, we can also measure the UV protection factor of a textile, or its behavior under infrared and near-infrared radiation.