Purpose and Objective

Develop test method to accurately predict performance of Velcro hook and loop fasteners in diapers.

• Write test procedure for measuring peel and shear forces to simulate real world conditions of Velcro's hook and loop fasteners on baby diapers
• Design and build test fixture to measure peel and shear forces under varying elastic pre-loads on a surface that simulates the geometry and compliance of a baby's body

Technical Approach

Problem Identification

• Characterize fastener behavior in diapers

Quantify Parameters

• Shape and properties of infant's waist
• Determine spring constant of elastic diaper band

Develop Test Platform

• Design fixture for peel and shear testing
• Develop test procedure using new fixture

Verify and Compare Results

• Perform gage R&R study
• Gather data with new test fixture
• Compare results to existing tests

Final Solution

Fixture in Shear

Fixture in Peel