Leder Biegeverstand Tester

This instrument is used to test the flexural resistance of leather under continuous bending. It is an internationally recognized instrument for evaluating the flexural performance of various types of light leather and their surface finishes. It can also determine the tendency for cracking to occur in creases due to walking. The bending mechanism of this flexural tester differs from that of a shoe upper flexural tester, and the two instruments complement each other. It is also used for pre-treating samples before measuring water vapor permeability—particularly for testing upper materials of protective footwear.

Anwendung

The Leather Bending Resistance Tester is used to test the bending resistance performance of leather under continuous bending action. The instrument is also suitable for performance verification of new products in R&D, quality control in production departments, third-party testing institutions, laboratory product performance verification, and material performance testing by quality and technical supervision departments.

Standard Test

ISO 5402: Leather Flexing Resistance Test Method

ISO 17694: Footwear / Leather Flexing Performance Test

ASTM D2813: Leather Flexing Resistance Test

ASTM D6182: Footwear Materials Flexing Resistance Test

EN ISO 20344:6.6 Protective Footwear - Upper Material Flexing Performance

EN 13512: Leather and Footwear Materials Flexing Resistance

DIN 53351: Leather Continuous Flexing Durability Test

UNI 4818: Italian Leather Flexing Performance Test

I.U.P.10+20. I.U.P.20: International Union of Leather Technologists and Chemists - Flexing Resistance Test

BS 3144: Leather Flexing Resistance Test

JIS K6545: Leather Flexing Performance Test

Eigenschaften

The fixture features a stainless steel quick-clamping design for reliable clamping and has 12 workstations for quick sample fixing, improving work efficiency.

1. Multi-station design

The flexible and compact design of the equipment's working area ensures convenient sample loading, smooth transitions, and low noise during testing.

2. Button + Counter Module Control

The digital counter allows for presetting the number of tests and test time, and automatically stops upon completion.

3. Flexible and compact design

The special design of the equipment's working area ensures convenient sample loading, smooth transitions, and low noise during testing.

Parameter

Accessoriess

Standard accessories: 12 sets of standard leather flexural fatigue test fixtures (suitable for 70×45mm test specimens, conforming to ISO 5402 and other standards), test specimen fixing clips (stainless steel, to prevent test specimens from loosening), test specimen laser cutting die (corresponding to standard test specimen size), operation manual, certificate of conformity, power cord (suitable for 220V 50Hz power supply), equipment leveling feet (4 pieces)

Optional accessories: Finished shoe upper flexural fatigue test fixture (suitable for testing entire shoe uppers, conforming to GB/T 20991 standard), upper coating flexural fatigue test fixture (suitable for thin leather/fabric, improving testing accuracy), multi-station expansion fixture (upgrading the test stations to 24 sets), data acquisition software (for recording test cycles, bending angles, etc.), spare fixture springs (consumable parts, extending the service life of the fixtures), test specimen marking pen (for marking cracks on test specimens)

Test Procedures

1. The 12-test position model is a popular model, allowing users to easily change the workstation arrangement and easily load and unload samples. The entire machine is made of stainless steel, and the digital counter can be preset with the number of cycles, so the machine will automatically stop running when the set value is reached, eliminating the need for constant supervision.

2.  The prepared leather samples are mounted on the upper and lower clamps. After running for a certain number of cycles at the standard speed and stroke, the samples are removed and their bending characteristics are evaluated. The equipment is easy to set up, convenient to operate, stable in performance, and has a long service life.