UT2090 Notched Constant Tensile Load Testing Machine for Plastic is used to evaluate the stress crack resistance of polyolefin geomembranes by notched constant tensile load test. It is mainly applicable to the geomembranes used on the landfill site. Dumbbell shaped notched test specimens from a polyolefin sheet are subjected to a constant tensile load in the present of a surface-active agent and at an elevated temperature. The time to failure of test specimens is recorded and the results of a series of such tests conducted at different stress levels are presented by plotting stress level against failure time for each stress level on a log-log axis.

Notched Constant Tensile Load Testing Machine is used to determine the impact toughness of non-metallic material such as rigid plastics, fiber reinforced composite material, nylon, glass, ceramics, cast stone, asbestos board, electrical insulating material, etc. It is suitable for notched and unnotched specimen.

Standard: 

ASTM D5397-20 Standard Test Method for Evaluation of Stress Crack Resistance of Polyolefin Geomembranes Using Notched Constant Tensile Load Test.

NSF 54: 1993 FLEXIBLE MEMBRANE LINERS

Feature: 

1. All six units can be tested independently, easy to operate, accurate and reliable;

2. Six-unit design, each unit has five stations, and the test efficiency is extremely high;

3. The system has automatic water replenishment function, and the double stirring motor makes the temperature fluctuation in the bath smaller, and the circulating runner makes the temperature field more uniform;

4. The glass cover device between the specimen frame is conducive to preventing water vapor evaporation and facilitating the observation of the test condition;

5. Functions such as automatic control of ambient temperature, automatic control of liquid level height, automatic recording of breaking time, printing test data, etc.;

6. It has the function of alarm function of abnormal temperature or liquid level;

7. Customized anti-corrission bath Notched Constant Tensile Load Testing Machine is available. for different cleaning products (bleach, detergents, peroxide based cleaners) liquid testing. 

Main specification: 

GB/T 17643-2011 Geosynthetics Polyethylene Geomembrane Appendix D

CJ/T 234-2006 High density polyethylene geomembrane for landfill sites Appendix C

ASTM D5397-20 Standard Test Method for Evaluation of Stress Crack Resistance of Polyolefin Geomembranes Using Notched Constant Tensile Load Test.