Measuring and Explaining the “Creature Measuring and Explaining the “Creature Comforts” of Performance TextilesComforts” of Performance Textiles

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Testing for Testing for Functional TextilesFunctional Textiles

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Tear Strength

Tearing Strength

Standards involved: ISO 13937-1/2; ASTM D1424; ASTM D2261; ISO 3377-2; BS EN ISO 4674, etc

Apparatus involved: Elmendorf Tester or Universal Strength Tester –CRE;

The tearing strength is maximum force needed to continue tearing of a fabric that has a pre-cut opening in the specimen.

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Tensile Strength / Elongation

Tensile Strength / Elongation at Break

Standard involved: ASTM D 5034; ASTM D2209; BS EN ISO 3376; BS EN ISO 13934-1 & 2, etc

Apparatus involved: Universal Strength Tester –CRE

The tensile strength is determined by a force at a constant rate of extension to a fabric sample held in place by one fixed and one moveable jaw. The force required for a break in the fabric is recorded. The elongation at break is also recorded by the strength tester.

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Seam Strength / Slippage

Seam Strength / Slippage

Standard involved: ASTM D1683; JIS L1093; ISO 13935-1/2, BS EN 13572

Apparatus involved: Universal Strength Tester –CRE

The seam strength is determined by stretching a seam aligned midway between the gripping jaws, the maximum force before seam breakage is recorded. Seam slippage is similar to seam strength, instead that the force is measured when the seam has slipped to a defined displacement. The seam is not ruptured in the process

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Bursting Strength

Bursting Strength

Standard involved: ASTM D3786; ASTM D3787; JIS L1096; BS EN ISO 13938-1 & 2, etc

Apparatus employed: Hydraulic or Pneumatic Burst Testers and Ball Burst Tester

The specimen is clamped in a holder, a distension force, either by means of hydraulic, pneumatic, or mechanical means, is applied on the specimen until it ruptures. The bursting force is the maximum force recorded during the course of testing

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Water Repellency/Resistance

Water Repellency/Resistance

AATCC 22 Spray Test

Apparatus employed: Spray tester,

The test procedure involves applying water to a specimen surface, using gravity. The after-test specimens are then assessed for amount and degree of surface wetting observed

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Water Repellency/Resistance

Water Repellency/Resistance

AATCC 35 Rain Test

Apparatus employed: Rain Tester

The test procedure involves applying water to a specimen surface, under pressure. A blotting paper is behind the tested specimen during the test. The amount of water that penetrates the fabric and is absorbed by the blotting paper is measured after the test.

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Odor Determination

Market EU US AS China Japan

Test Method Ref. SNV 195651

Fed. Std. 148a Method 11

N/A GB/T14272 JIS L1093

General Requirement

<3 <3 N/A <2 <3

PrincipleThe odor test indicates potential odor problems.

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Odor Determination

The odor test is performed with reference to SNV 195651. The test specimen (40g) is placed on top of 300ml sodium carbonate solution and kept in a closed container. The container is put it into a oven set to a temperature of 37 +/-2°C for 15 hours.

Six people (minimum) are required to independently judge the odor intensity and rate it according to the following nomenclature:

Intensity Scales

Grade 1 – odorless

Grade 2 – weak odor

Grade 3 – tolerable odor

Grade 4 – annoying odor

Grade 5 – intolerable odor

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Quick Dry / Moisture Management

Move sweat/moisture away from the body to the outer layer of the fabric

Tests:– Moisture Management – Drying rate– Wicking– Water Vapor Permeability– Air

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Liquid Repellency

PrincipleTo determine the degree to which a mixture of water and alcohol would be absorbed into a fabric.

AATCC Test Methods 193

Liquids composed of different combinations of water and alcohol are dropped onto the surface of a fabric. The time it takes to be absorbed into the fabric is observed. The rating is the number that has been assigned to the liquid that is not absorbed into the fabric.

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Moisture Management

PrincipleTo determine the moisture management characteristics of a fabric as a moisture management index

AATCC Test Methods 193

The results of the test are used to determine a moisture management index that is based on water resistance, water absorption and transport characteristics and wicking properties of the fabric structure including the fibers and yarns.

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Wicking

PrincipleTo determine the degree to which a liquid moves up the length of a fabric

Fabrics are suspended in a measured depth of water and the distance that the water travels up the fabric specimen is measured over time.

Indication of moisture transport away from a source.

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Drying Rate

PrincipleTo determine the rate at which a fabric will dry when wetted by water

Fabrics are wetted with a fixed amount of liquid and then exposed to heat. The drying rate of the fabric is determined by measuring the change in weight over time.

Indication of moisture transport away from a source.

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Water Repellency/Resistance

Water Repellency/Resistance

AATCC 127 Hydrostatic Pressure Test

Apparatus employed: Hydrostatic head tester

The test procedure involves applying water under the surface of a fabric and measuring the amount of pressure it takes to force water through the fabric. The pressure to force 5 drops of water through the fabric is determined.

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Air Permeability

Air Permeability

Standard involved: ASTM D737; BS EN ISO 9237; JIS L1096, etc

Apparatus employed: Air Permeability Tester

The sample is secured on the permeability tester. The tester then generates an air pressure gradient across both sides of the sample. The faster the rate of pressure gradient degeneration, the higher is the air permeability of the sample

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Thermal Resistance

Thermal Resistance Provide thermal

insulation to body Tests:

– Thermal resistance value of fabrics

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Functional Products

Major Test Items

• Garments

• Personal Apparel

• Hats

• Shoes

• Sportswear

• Swimwear

• Umbrella

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