Tear resistance tester

Application：

The paper tearing strength tester, also known as the paper and cardboard tearing strength tester, is used to detect the tearing strength of paper materials by tearing a certain number of pre cut edges. It complies with the relevant provisions of ISO1974 "Paper - Determination of Tear Strength (Elmendorf Method)" and GB455.1 "Determination of Paper Tear Strength" standards, and is suitable for measuring the tearing strength of various types of paper. It can also be used for testing the tear resistance of lower strength cardboard, textiles, leather, film and other sheet composite materials.

Test Principle：

A stack of samples with a predetermined pre cut (usually 4 layers), the pendulum is raised to a certain height to have a certain potential energy. When the pendulum swings freely, its stored energy is used to tear the sample a fixed distance. The potential energy loss of the pendulum is used to measure the work done during the tearing process of the sample.

Standard：

GB/T 455, ISO 1974, QB/T 1050

Technical Parameters：

Measuring Range	Range A: (50 ~ 8000) mN Range B: (8000 ~ 16000) mN
Tearing Arm	104±1 mm
Initial Tearing Angle	27.5±0.5°
Tearing Distance	43±0.5 mm
Notch Length	20 mm
Paper Clamping Surface Size	25×15 mm
Pendulum Thickness	7±0.1 mm
Vertical Distance from Pendulum Bottom to Base	6 mm
Reset Knife Rod Length	136.5±0.2 mm
Specimen Splint Width	53±0.1 mm
Solenoid Valve Telescopic Column Protrusion Height	7.50±0.02 mm
Solenoid Valve Telescopic Column Diameter	6.05±0.01 mm
Free Swing Times	min≥20, mid≥25, stand≥35
Specimen Size	(63±0.5) mm × (50±2) mm
Test Reading Range	20% – 80% of full scale
Tearing Offset	Less than 10 mm from knife extension line (when offset number < 2)
Distance between Paper Clamps	2.8±0.3 mm
Operating Environment	Temperature (0~35) ℃, Humidity ＜ 85%
HMI	7-inch LCD display, real-time test data display
Dimensions	410×320×580 mm
Power Supply	220 V, 50 Hz
Print Output	Modular integrated thermal printer; computer connection (optional)

Scope of Application：

Paper: Tear strength testing suitable for materials such as base paper, printing paper, yarn tube paper, etc
Fiber materials: Tear strength testing suitable for materials such as glass fiber and carbon fiber
Thin films: Tear strength testing of optical films, composite films, superconducting films, and insulating membrane materials
Other materials: Tear strength testing suitable for non-woven fabrics, fabrics, leather, and other composite materials