Balance Community Materials test laboratory · SnapLab

Record Sample 4
Product Silk 99
Batch W25YZ

Tensile test

Sample 4

Silk 99Batch W25YZAugust 11, 2026

Breaking force

37.88kN

Force–time trace

The capture from the rig’s force channel, plotted against elapsed time.

Test details

Tested: Aug 11, 2026 · 15:21
Duration: 113.6s
Scan rate: 500.0Hz
Sample: 4
Study: Batch Report - Silk 99 - W25YZ
Test machine: SnapLab break-test bench
DAQ device: LabJack T7
Beam location: No. 2 — Second position
Fixed grip: Sewn Loop
Moving grip: Sewn Loop

Instrumentation

Recorded channels
Channel	Sensor	Type	Units	Calibrated
AIN2 Main	Main Force Sensor	force	kN	Not recorded

Method

Silk 99 sewn loop (pattern 504) in the Sewn Loop to Sewn Loop break-test rig, line drawing — Test setup: Sewn Loop to Sewn Loop · Diamond ramp for 20 mm webbings

Configuration Sewn Loop to Sewn Loop

Sewing pattern Diamond ramp for 20 mm webbings Pattern 504

Determines strength retention in a sewn loop. The particular pattern used for sewing is indicated on each test.

Each sewn loop is done in an opposite direction in order to take out the possibility of failure by uneven loading across the width and thickness of the webbing. Each sewn loop is directly attached to the clevis pins on our test machine, with a diameter of pin diameter of 19mm.

These tests are often used as our elongation tests as well, since they experience the least change in length within the anchoring method.

Webbing starting length - 1.5 m (5 ft)
Pull Rate - ~350 mm per minute

Part of batch W25YZ →