Introduction of ZNP-01 Paper Bursting Tester

ZNP-01 Paper Bursting Tester is used to measure the bursting strength of paper submitted to increasing hydraulic pressure. It is applicable to paper having bursting strengths within the range70 kPa to 1400 kPa. It is not intended to be used for the components (such as fluting medium or linerboard) of a combined board, for which the method given in ISO 27591 is more suitable.

Terms

• Bursting strength: maximum pressure developed by the hydraulic system in forcing an elastic diaphragm through a circular area of the paper when the pressure is applied in the manner described in the method
• Burst index: bursting strength of paper, in kilopascals, divided by the grammage of the paper determined in accordance with ISO 536

Why do you need a paper bursting tester?

Bursting strength testing is essential for evaluating the structural integrity and durability of paper, particularly in the context of packaging and transportation. This test ensures that the chosen paper materials for packaging can withstand external pressures, minimizing the risks of damage or breakage during transit and handling. Regular testing serves as a crucial quality control measure for manufacturers, allowing them to maintain consistent production standards and promptly address any issues. The results provide valuable insights into the selection of appropriate paper materials for packaging design. Additionally, adherence to industry standards is facilitated by testing, ensuring that paper products meet the required specifications. Overall, bursting strength testing plays a vital role in enhancing the quality, reliability, and performance of paper across various applications.

Advantages of ZNP-01 Paper Bursting Tester

1. Human-Machine Interface: Equipped with a 5-inch touchscreen for user interaction.
2. Testing Control: Features delayed pressurization control and pressure release delay control.
3. Clamping Force: Adjustable clamping force ranging from 100kPa to 1200kPa, with stabilizing functionality to ensure consistent clamping force.
4. Oil Cup System: Utilizes a high-strength, high-pressure oil circuit sealing system, including dual-seal knobs and a 25mm high-pressure 30 stainless steel oil pipe.
5. Circuit Board Chip Protection: Integrated with a water vapor filtration device to safeguard the stability of the circuit.
6. Calibration System: Includes a built-in calibration system and a self-contained manual pressure and pressure release control system.
7. Testing Head Material: The cylinder section, upper clamping, and lower clamping parts are constructed from 304 stainless steel.
8. Safety Features: Comes with a protective cover and a power supply anti-interference protection module.
9. Language Switching: Supports free switching between Chinese and English languages.
10. Unit Conversion: Allows unit conversion between Kg/cm2, kPa, and lbf/in2.
11. Print Output: Equipped with a modular integrated thermal printer for convenient printing.

Test Principle

A test piece, placed over a circular elastic diaphragm, is rigidly clamped at the periphery but free to bulge with the diaphragm. Hydraulic fluid is pumped at a constant rate, bulging the diaphragm until the test piece ruptures. The bursting strength of the test piece is the maximum value of the applied hydraulic pressure.

Main Parameter

Paper Bursting Test Standards

GB/T 454, QB/T 1057, ISO 2758, TAPPI T 403, JIS P 8112, BS 3137, ASTM D774

Configuration

• Standard configuration: ZNP-01 Bursting Tester, wrench, silicone oil (not available for air shipping) , rubber diaphragm, foil, paper roll, manual, calibration certificate, power cord.
• Optional configuration: extra diaphragm, extra foil, COM Line, Software, air compressor

FAQs

1. What is Paper and Paperboard Bursting Strength?
   Bursting Strength refers to the ability of paper and paperboard materials to withstand bursting or breaking when subjected to external forces, typically measured using a bursting strength tester. The result indicates the maximum force that the paper or paperboard can resist per unit area before rupturing, providing insights into the material's structural strength and durability, particularly relevant in the context of packaging and transportation.
2. Why is the bursting test always referred to as Mullen Method?
   The Mullen Method is named after one of its founders, Emory H. Mullen. Emory H. Mullen, along with other engineers, developed the Bursting Tester in the United States in 1926, which is a specialized instrument for measuring the bursting strength of paper and paperboard. Due to his contributions to the development and promotion of this testing method, it became known as the Mullen Method.
   The introduction of the Mullen Method provided the paper and paperboard industry with a standardized and repeatable way to measure a material's resistance to bursting under pressure. This testing method is widely used in the packaging and related industries to assess the strength of materials, especially when considering the stresses they may undergo during transportation and packaging processes.