Tensile Testing Device
PRESS-STUD COMPONENT REMOVAL STRENGTH Tensile Testing Device
SCOPE
This In House Test Method of Tensile Testing Device describes the method of test in order to determine the strength of attachment of press-studs (poppers) to textile materials used in garments.
PRINCIPLE
The correct numbers of test specimens are to be prepared and tested as specified within this test method in order to achieve a performance assessment of the product/fabric as described within the scope.
A sample is taken from the garment, consisting of a sandwich of several fabric layers through which a press-stud (popper) has been applied. This is subjected to a known load, applied in such a way that the fabrics apply forces across the two halves of the press-stud component in opposing directions, thus tending to prise the two halves apart. Male and female halves of the press-stud (popper) are tested separately.
EQUIPMENT
Tensile testing device of the constant rate of elongation type, capable of determining the applied load to ±5% accuracy at a rate of traverse 50 ±5mm/minute.Jaw width 50mm Gauge length Variable to suit test specimens being evaluated.
CONDITIONING
The test specimens are to be conditioned in the standard atmosphere of 65% Relative Humidity (RH) +/- 2% and 20°C +/- 2°C for a minimum of 4 hours. All tests should also be carried out in this atmosphere. Specification Force range: 10 ~ 1000N Test travel: 350 mm Sensing method: push pull meter Test speed: 5 ~ 300mm / min adjustable (can be customized) Power System: AC motor Volume: 560 × 345 × 1080 mm
HEATH & SAFETY
Safety goggles must be worn.
PREPARATION OF TEST SPECIMENS / MATERIALS
Prepare the specimens as described in 5.2 such that the fabric strip has a maximum length and width (up to 200mm length and 50mm width), with one male, or one female, press-stud (popper) component positioned centrally within the width and as centrally as possible in the length direction. Testing press-stud/Fabrics removed from the garment. Cut a parallel strip of fabric from the garment that contains a single male, or female, press stud (popper) component such that:
- The press-stud (popper) component is positioned centrally in the width of the fabric strip.
- The width of the fabric strip is at least 20mm (up to a maximum of 50mm).
- The press-stud component is positioned approximately centrally in the length-wise direction of the fabric strip.
- The length of fabric on either side of the press-stud (popper) is between 25mm and 100mm. Note: Ensure that all four edges of the fabric strip have been cut. It may be necessary to separate the layers of fabric by cutting through lines of stitching.
TEST PROCEDURE
- Grip the test specimen in the jaw of the Tensile Testing Device in the manner shown in Diagram
- Determine the force to remove the press-stud (popper) component.
- Test a minimum of three male and three female components.
ASSESSMENT OF RESULTS:Ensure that comments as to how the components have broken down are reported.
REPORTING OF RESULTS
- The number of male and female press-stud (popper) components tested.
- The average press-stud (popper) removal force for the male and female components separately.
- Conclusion
- The minimum press-stud (popper) removal force for the male and female components separately by Tensile Testing Device
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