summaryAlthough shoelaces are small, they are crucial components in footwear products that are closely related to wearing experience and safety. Its wear resistance directly determines the durability and reliability of the product. This article systematically introduces the technical principles, mainstream testing standards (such as SATRA, GB/T), equipment operation procedures, result evaluation methods, and core values of shoelace wear resistance testing in product development and quality control.

1、 Introduction: Why should we pay attention to the durability of shoelaces?

In the daily use of shoes, shoelaces frequently rub against the eyelets (holes), hook centers, and each other. This sustained friction can lead to:

1. Surface fuzzing and yarn breakageAffects aesthetics and gradually weakens the strength of shoelaces.

2. final fractureMay cause the wearer to trip, posing a safety risk in sports or specific work environments.

3. Decreased user experienceWorn shoelaces are harder to tie tightly and have an outdated appearance.

Therefore, conducting scientific and quantifiable wear resistance testing on shoelaces is essential for evaluating their quality level, verifying new materials, and improving production processesOne link.

2、 Mainstream testing standards and methods

There are various testing standards for the wear resistance of shoelaces and webbing both internationally and domesticallyrepresentativeIt is the British SATRA TM93 and 154 standards. China's national standards are also similar.

1. Testing principle
The core principle isSimulate friction conditions in actual useUnder a specific tension, the shoelace sample is subjected to reciprocating or unidirectional friction with a standard abrasive (usually sandpaper or a specific material of shoe eye) until the specified number of friction cycles is reached or the sample fractures. Determine its wear resistance level by recording the number of friction cycles or evaluating the wear status.

2. Common testing standards

• SATRA TM27: Test method for shoelace abrasion resistance

• Wear resistance timesThe total number of friction times when the shoelace is worn off.

• Evaluation after preset number of timesAfter a specified number of times (such as 5000 times, 10000 times), check whether the shoelaces are damaged by yarn breakage, holes, etc., or measure their remaining strength.

• abrasiveActual use of metal/plastic shoe eyelets.

• loadApply the specified tension at both ends of the shoelace

• Friction stroke and frequencyThe device drives the abrasive to rub back and forth with the shoelaces at a fixed stroke and frequency.

• equipmentCS-6048 shoelace abrasion tester.

• Sample preparationCut a certain length of shoelace sample.

• Install the test, set the number of tests, and adjust the speed. Start testing
  

  
  

• GB/T 3903.36-2021 "Test Method for Wear Resistance of Shoe Laces"
  This national standard is highly consistent in principle and method with SATRA TM93 and 154, providing a unified testing basis for the Chinese market.

3. Detailed explanation of testing equipment
Taking a typical shoelace abrasion tester as an example, its main components include:

• drive systemProvide smooth reciprocating motion.

• Fixture mechanismOne end fixes the abrasive, and the other end clamps the two ends of the shoelace and applies a constant tension.

• Tension control systemUsually achieved through weights or pneumatic devices to ensure constant tension during the testing process.

• counterAccurately record the number of reciprocating frictions.

• Automatic shutdown functionWhen the shoelace breaks, the device can automatically stop and record the final number of times.

3、 Testing process (taking SATRA TM154 as an example)

1. Preparation phase：

• Adjust the state of shoelace samples under standard temperature and humidity conditions (such as 23 ± 2 ° C, 50 ± 10% relative humidity).

• Cut at least 3 valid samples to ensure the representativeness of the results.

• Install new standard sandpaper or specified abrasive.

2. Install the sample：

• Thread the shoelaces through the fixture of the equipment to make them flat and in contact with the abrasive.

• Apply the specified standard tension load at both ends of the shoelace.

3. execute tests：

• Set the number of tests.

• Start the device and begin the friction test.

4. Result recording and evaluation：

• Visual assessmentCompare with standard samples to evaluate the level of fuzzing and wear.

• Strength retention rate testPerform tensile strength testing on the tested shoelaces, compare them with the untested original shoelaces, and calculate the strength loss rate.

  方法（定性/半定量）After completing the preset number of times, take out the sample: