Method 2 Peel strength after repeated opening and closing
Repeatedly open and touch a touch and close fastener along its length by a machine. Then assess the peel strength through performing repeatedly the test procedures showed in method 1.
Method 3 Shear strength
Under required conditions, the parts of a touch and close fastener are pressed together with one of the parts offset to the other. As a result, a standard contact area occurs between the two parts. It’s required to assess the biggest shear force required to pull them apart along their length in both directions. This step is worked with a tensile testing machine. The whole procedure is performed again and again with one of parts of the fastener turned through 180°.
Method 4 Shear strength after repeated opening and closing
Open and close a touch and close fastener repeatedly along its length by a machine. It is required to determine the shear strength by performing the test procedure repeatedly in Method 3.
Method 5 Peel strength of fasteners attached to footwear
A touch and close fastener and the part of the footwear attached to the fastener are cut from the completed footwear. Then it needs to measure the peel strength of the fastener in the direction where failure is most likely in typical wear.
Method 6 Shear strength of fasteners attached to footwear
A touch and close fastener and the part of the footwear attached to the fastener are cut from the completed footwear. Then it needs to measure the shear strength of the fastener in the direction where failure is most likely in typical wear.
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