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- Case Studies / Clothing Button Pull-Off TTF Testing
Clothing Button Pull-Off TTF Testing
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Button pull-off test for textile attachment quality
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tensile testing fixtures suitable for clothing button pull-off force measurement
Solution
- Motorised tensile test stand with digital force gauge
- Custom grips designed for securing both the garment and the button
Benefits
- Simple, repeatable pull-off testing procedure
- Automatic detection and capture of Test-to-Failure (TTF)
- Results generated in alignment with client-specific standards
Any button, attachment, or fastener in a garment for infant and children's use shall not be detached or break away while the garment is being worn. Presto’s tensile testing system is motorized and used for testing button pull-off and Test to Fail (TTF), per international clothing safety standards. The system features special holders to firmly keep the garment fabric and button and to apply controlled tensile force to the garment fabric at a constant speed. With high-speed data acquisition, the highest peak force necessary to detach/break the button can be captured with overall excellent repeatability. With this test method, manufacturers can ensure that their products remain safe, test the force of attachment, and verify children's apparel for product testing and quality control for shipping domestically or abroad.
Requirement
An engineering supplier to a leading UK retailer needed extensive testing of fasteners and attachments to meet quality and safety requirements. Button integrity for infant clothing is vital to ensure design tolerances are met and to avoid safety risks.
The client required a motorized testing system capable of operating at 200 mm/min, providing consistent and reliable results suitable for a production environment while remaining simple for operators to use.
Solution
The garment fabric was held in a double-action vice grip, featuring 50 mm wide non-slip rubber faces to secure the material without damage.
The button-pull fixture included interchangeable plates with slots of 3.5 mm or 7 mm to accommodate different button sizes. As buttons often fracture during testing, a clear perspex guard was incorporated to protect the operator.
guard was incorporated to protect the operator. To ensure a straight-line pull and ease of loading, the button pull fixture was linked to the force gauge via a flexible chain. Peak tension loads required to remove or break each button were recorded at a high-speed data acquisition rate of 1200 Hz, providing precise and repeatable measurements.
Test equipment
- N Motorised Test Stand
- Advanced Force Gauge (AFG)
- Double-Action Vise-Grip
- Button Pull Fixture
Test Standards
- BS EN 17394-2: Safety of children's clothing — Security of attachment of buttons — Test method
- PD CEN/TR 17394-1: Safety of children's clothing — Security of attached components for infants — Specification
Test standards
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