Application
The Snap Tester (also known as the Button Pull Tester) is designed to measure the holding or breaking strength of prong-ring attached snap fasteners on garments, toys, and other fabric-based products. It can also be used as a Push Pull Tester for compression and tensile testing of small samples, with special attachments available. This versatile tool is ideal for testing a wide range of fasteners, including snaps, jean buttons, four-hole buttons, and garment accessories such as zippers, bows, appliqué, toggles, hooks, bars, and D-rings.
The Snap Tester consists of an upper snap clamp, a lower fabric clamp, and a force gauge mounted on a stand. A hand wheel at the bottom provides fine control for applying specific forces, allowing precise recording of holding force or breaking strength.
Included Accessories
- 1 Upper Stud Clamp
- 1 Long Nose Vice Grip
- 1 Upper Snap Clamp
- 1 Three Pronged Clamp
- 1 Two Pronged Clamp with Screw
- 1 Lower Grasp Button Kit (on the machine)
- 1 Lower Fabric Clamp, Lever Arm Locking (on the machine)
Optional Order
Sundoo Force Gauge (300N, resolution 2N, accuracy +/-1% FS)
Testing Method
Button Pull Test Method
Button Pull Test Conditions
Before conducting the button pull test, ensure that the specimen has reached moisture equilibrium under standard atmospheric conditions, as specified by Practice D1776.
Button Pull Test Procedure
- Setup: Verify the snap tester by using 15lb (6.82kg) ±10% calibration weights (optional).
- Clamping: Attach the appropriate upper clamp to the pull gauge hook (optional accessories available). Adjust the pull gauge to the zero position using the Zero Tare Ring.
- Positioning the Specimen: Place the fabric specimen correctly in the Lower Fabric Clamp and position the snap button centrally.
- Clamping the Button: Lower the Universal Clamp to a position above the test piece, then clamp the button onto the Universal Clamp.
- Tightening the Clamp: Adjust the Upper Snap Clamp so that its claws just touch the circumferential edge of the button, ensuring that only the button is gripped, not the fabric.
- Testing: Turn on the tester and use the Right-hand Flywheel to apply force. Monitor the button’s response as the force increases. The test is recorded when the force reaches 7 kg or when the button separates from the fabric.
- Data Recording: If the button separates from the fabric before reaching 7 kg, record the breaking force. If the button withstands the 7 kg force, hold it for 10 seconds before releasing.
Test Data and Results
After the test, record the force at which the button detaches from the fabric. Repeat the procedure for additional button specimens to ensure consistent results.
