zwickiLine for Flexible Low-Force Testing
In the application shown above, the simple closing force of snaps and the pull-out strength of snaps are tested according to BS 4162.
The test arrangement used consists of 2 parts:
The snap with the textile fabric is inserted and secured in the lower clamp. A ring is pressed into the fabric and simultaneously the fabric is pulled tight. The upper part of the snap is manually pressed on. Then the upper part of the snap is clamped in the gripper tongs. No tensile force should be applied to the connection. The tensile test is carried out to determine the maximum force of the push button connection. The results are shown in a typical force travel diagram.
EN 71 defines requirements and methods for testing the mechanical and physical properties of toys.
In the above example, the limbs of stuffed animals are tested for their strength and seam connection. The toy is inserted into a device with a circular opening. The opening is designed so that the stuffed animal cannot be pulled through during the test. In this case, a simple screw specimen grip is used to hold the stuffed animal or the limbs.
Zwick offers a wide range of diverse lower clamps, tools, and specimen grips for the various tasks.
BS 3084 shows the different types of zippers and a variety of test options.
In the above example, a plastic zipper is tested to determine its properties. The textile part of the zipper is clamped so that the zipper is supported. A tensile test is carried out perpendicular to the zipper and tested until the zipper fails. The maximum force is determined and the results are shown in a typical force travel diagram.
Belt connectors in the form of loops, knots or clips are tested for their safety-related properties.
In the example shown, the maximum force that affects the stitching, the safety clip, or the belt is determined. The belt is rolled in the roller grip and is held securely; on the opposite side the bracket is clamped in a pneumatic specimen grip. The tensile test is carried out according to EN 1492 to determine the maximum force of the entire connection. A force travel diagram is recorded via the crosshead; an additional measuring system is not required. Zwick offers a wide ranging product portfolio with diverse specimen grips and machine types to perform reproducible tests according to standards.