Product Introduction 
The Paper bursting strength tester operates on the hydraulic (glycerin) pressurization principle. An electric pump delivers liquid at a constant rate into a chamber beneath a rubber diaphragm clamped under the specimen. The diaphragm expands and pushes the specimen until it bursts. A high-precision pressure sensor captures the fluid pressure in real time; the maximum pressure recorded at the moment of rupture is the bursting strength. The instrument is controlled via a touchscreen, allowing users to set clamping pressure, monitor the test process, and display and store results. The pneumatic clamping mechanism ensures secure, uniform specimen holding, and the excellently sealed hydraulic system guarantees accurate and reliable data.

Key Features 
Wide Range, High Precision Measuring range 1-1600 kPa, resolution 0.11 kPa, indication error ±0.5% FS, meeting needs from tissue to high-strength paperboard.
Full Standard Compliance Fully compliant with ISO 2759, GB/T 6545-1998, and JJG (Light Industry) 61-2000, ensuring internationally recognized test results.
Stable Pneumatic Clamping Specimen clamping pressure ≥690 kPa, adjustable; pneumatic clamping ensures uniform specimen holding and prevents slippage or edge rupture.
Touchscreen Intelligent Control Intuitive touchscreen interface for parameter setting, process monitoring, and result display, offering convenient operation.
Highly Sealed Hydraulic System Excellent system sealing with pressure drop <10% Pmax within 1 minute, ensuring stable pressurization and accurate data.
Standard Clamp Geometry Upper clamp inner diameter 30.5±0.05 mm and lower clamp 33.1±0.05 mm, strictly compliant with standard specifications.
Constant Pumping Rate Pumping rate of 95±5 ml/min meets the standard-specified hydraulic pressurization rate, ensuring consistent test conditions.
Standardized Diaphragm Resistance Diaphragm resistance of 25-35 kPa conforms to standards, ensuring controlled influence of diaphragm characteristics on test results.

Main Technical Specifications 

FAQ 
1. What materials are suitable for bursting strength testing?
It is suitable for determining the bursting strength of various papers and paperboards, including kraft paper, corrugating medium, linerboard, and other packaging materials. Appropriate clamping pressure should be selected based on material grammage and thickness.

2. What is the advantage of pneumatic clamping over manual clamping?
Pneumatic clamping provides constant and uniform clamping force that is precisely adjustable and stable, avoiding specimen slippage or premature rupture caused by uneven manual clamping, significantly improving repeatability and accuracy.

3. Does the diaphragm need to be replaced periodically?
Yes. The diaphragm is a consumable part that may deform or age with repeated expansion over time. It should be replaced when its resistance exceeds the 25-35 kPa standard range or when visible deformation or damage occurs. Original replacement diaphragms are always available from our company.

4. How can I check if the hydraulic system sealing is normal?
The instrument has a self-check function. You can also observe the pressure drop within 1 minute. If the pressure drop is ≥10% Pmax, there may be a leak; check tubing connections and seals, and contact after-sales service if necessary.

5. Does the equipment require an external air supply?
Yes, it requires a clean compressed air supply adjustable between 0-1200 kPa to operate the pneumatic clamping system. A standard laboratory air compressor is usually sufficient.

6. What if the touchscreen malfunctions or is unresponsive?
First, check the power connection. If the problem persists, it may be a software issue or loose hardware connection. Contact our after-sales team for remote guidance or on-site inspection; do not disassemble the touchscreen module yourself.

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 Bursting Strength 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.