Clothing button pull-off TTF test

Case study
Button pull-off test for textile attachment quality using specific fixtures
Button pull-off test for textile attachment quality using specific fixtures
MultiTest and tensile testing fixtures suitable for clothing button pull-off force measurement
MultiTest and tensile testing fixtures suitable for clothing button pull-off force measurement

Solution

  • Tensile test stand digital force gauge
  • Specific grips suitable for gripping garment and button

Benefits

  • Simple and accurate pull test procedure
  • Test To Failure (TTF) condition detected and captured automatically
  • Results in accordance with end customer test standards

Requirement

The customer was a supplier to major UK clothing retailer Marks & Spencer, who stipulate that all fasteners and attachments must be tested to failure.

The strength of the joint/button was critical to ensure that it met design tolerance and safety levels, particularly in baby clothing. A motorised unit with a test speed was defined at 200 mm/min as the system needed to be simple to use in a production environment and provide consistent results.

Solution

The cloth material was clamped in a 'Double Action Vice Grip' with 50 mm wide faces coated with non-slip rubber to enhance gripping strength.

The button fixture was supplied with interchangeable plates having slots of 3.5 or 7mm wide to suit the various sizes. Since it is normal for the button to shatter during the test, a perspex guard was incorporated in the fixture to protect the operator.

For ease of loading the button into the fixture, and to help maintain a straight-pull, the 'Button Pull Fixture" was connected to the force gauge via a flexible chain link. The peak tension load to remove/break the button was then recorded at the fast data-acquisition speed of 1200Hz.

Test equipment

  • 1000 N UltraTest Motorised Test Stand
  • 500 N AFG
  • Double Action Vice Grip
  • Button Pull Fixture
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