Product Introduction 
The paper tearing tester operates on the Elmendorf method principle. It measures the energy consumed by a pendulum in tearing a pre-cut paper or paperboard specimen to characterize the tearing strength of the material. During testing, a standard-sized specimen with a pre-cut initial slit of specified length is clamped between pendulum-type fixtures. When the pendulum is released, it tears the specimen from the initial slit during its swing, and the tearing force value is displayed on the scale dial in mN. The instrument features a standard mechanical pendulum structure, is simple to operate, requires no power supply, and has low maintenance costs, making it a classic standard instrument for paper tearing strength testing.

Key Features
Standard Elmendorf Method Design Fully compliant with ISO 1974 and GB 455.1 standards, delivering internationally recognized test results suitable for QC, R&D, and teaching.
High-Precision Measurement System Measuring range of 10-1000 mN with a scale graduation of 10 mN; indication accuracy of ±1% within the main range for precise and reliable data.
Standard Pendulum Configuration Standard pendulum range of 10-1000 mN meets the tearing strength testing needs of conventional paper and low-strength paperboard.
Precise Mechanical Parameters Tearing arm 104±1 mm, initial tearing angle 27.5±0.5°, tearing distance 43±0.5 mm, strictly complying with standard specifications.
Standard Specimen Clamping Clamping surface dimensions 25×15 mm, clamp distance 2.8±0.3 mm; standardized specimen clamping, simple operation.
Purely Mechanical, Maintenance-Free Design Mechanical pendulum structure requires no power supply, has no risk of electronic failure, offers excellent long-term stability, and incurs low maintenance costs.
Intuitive and Easy Operation Direct scale reading; simple and intuitive operation requires no specialized training, suitable for both laboratory and production floor use.
Wide Industry Applicability A standard configuration instrument for paper mills, research institutions, and product quality supervision departments.

Main Technical Specifications 

FAQ 
1. What types of paper and board are suitable for tear testing?
It is suitable for various types of paper and lower-strength paperboard. For thick boards with high tearing strength, a pendulum configuration with a larger measuring range may be required. Refer to ISO 1974 or GB 455.1 for specific applicability.

2. What specimen preparation is required before testing?
Specimens should be cut to specified dimensions and conditioned under standard temperature and humidity conditions. A standard initial cut must be made on each specimen. Refer to ISO 1974 or GB 455.1 for detailed size requirements and preparation methods.

3. How can I ensure measurement accuracy?
The instrument is factory-calibrated. Routine verification can be performed by checking the pendulum's free swing and the scale zero position. Ensure specimens are clamped flat, initial cuts are correctly made, and the testing environment meets standard requirements.

4. Can the instrument measure both machine direction and cross direction tear?
Yes. Paper tear is typically tested in both machine direction (MD) and cross direction (CD). The testing method is identical; only the specimen cutting direction differs. Comparing MD and CD tear strength helps assess paper anisotropy.

5. Does the pendulum mechanism require regular lubrication?
The pendulum bearings are lubricated at the factory and generally do not need frequent re-oiling. Keep the equipment clean and periodically wipe the body with a soft cloth to prevent dust from entering bearing components. If pendulum movement becomes stiff, contact after-sales service.

6. Does the instrument require a power supply?
This instrument has a purely mechanical structure and requires no power supply. It can be used in any environment without being limited by power availability.

After-Sales Service 
Established in 2007 and with nearly two decades of experience, Shandong Annimet Instrument Co., Ltd. is a professional manufacturer integrating R&D, production, and sales of laboratory testing and sample preparation equipment. Quality is our foundation. We are your bridge from concept to reality. We deliver more than just instruments — we deliver confidence. This Paper Tearing Tester comes with a 12-month warranty and lifetime technical support. Our professional team offers 24/7 service response, free installation guidance, operation training, and testing method consultation. For any inquiries, please contact our customer service team; we are dedicated to providing comprehensive pre-sales, in-sales, and after-sales support. Hotline: 400-9933-057, Email: anmt_test@126.com.