Definition
A breakage resistance meter is an instrument used to determine the ability of a material to resist rupture under uniform increasing pressure. This device measures the maximum pressure at the moment of rupture by simulating the state of the material when it is subjected to uniform pressure in the vertical direction, which is often referred to as the bursting index or bursting strength. In quality control and R&D in a variety of industries, the instrument is used to evaluate the physical strength properties of sheet or corrugated materials.
How it works:
The core operating principle of the instrument is based on a hydraulic or pneumatic transmission system. During testing, the specimen is held between two ring clamps, ensuring that it is flat and wrinkle-free. A flexible diaphragm is attached under the lower clamp, which is filled with fluid (such as glycerin or air). The control system drives the piston to apply steadily increasing pressure to the fluid, causing the diaphragm to expand evenly and jack up the specimen until it breaks. The pressure sensor monitors and records the peak pressure at the moment of rupture in real time, which is the breakage resistance of the material. Its basic relationship can be expressed as:
P = F/A
P is the bursting strength, F is the bursting force, and A is the measured area of the specimen.
Measurement method
Standard measurement processes usually follow relevant international or national standards. First, the specimen is cut and pretreated according to the standard to ensure that it is in a standard temperature and humidity environment. Place the specimen between the fixtures and apply the specified clamping force to avoid slipping. After starting the test, the system increases the pressure at a constant rate until the specimen breaks, and the instrument automatically records the peak pressure value. Typically, a single product is tested multiple times, with the arithmetic mean as the final result and the standard deviation calculated to assess the degree of data dispersion. The test report should indicate the test conditions, specimen size, clamping pressure and other parameters.
Influencing factors
The accuracy of the measurement results is influenced by several factors. The characteristics of the material itself, such as fiber orientation, thickness uniformity, humidity content and internal structure uniformity, are intrinsic factors that determine its bursting strength. In terms of instruments, the clamping force, compression rate stability, diaphragm elasticity and sensor accuracy may introduce deviations. Environmental conditions, particularly ambient temperature and humidity, can affect the physical properties of many materials. In addition, operational normatives, such as specimen placement and creases, can also affect test repeatability.
Applications:
This instrument is widely used in fields where quantitative evaluation of a material's burst resistance is required. In the paper industry, it is used to test the packaging strength of paper, cardboard and corrugated cardboard. In the inspection of packaging materials, it is used to evaluate the compressive properties of various packaging papers, cartons and composite materials. In the field of textiles, it can be used to test the bursting strength of materials such as non-woven fabrics and canvases. In addition, such instruments are often used for performance verification in the quality inspection and research and development of leather, rubber sheets and some industrial filter materials.
Equipment selection considerations
Choosing the right breakage meter requires a comprehensive consideration of multiple technical parameters. First, it is necessary to clarify the requirements of the test standard for measurement range, accuracy, pressurization rate and fixture size. The instrument range should cover the expected strength range of the material to be measured with a certain margin. Measurement accuracy and resolution directly affect the reliability of data and should meet quality control requirements. The pressurization rate range and control stability of the equipment are the key performance indicators. The size and clamping method of the fixture should be adapted to the specifications of the sample to be tested. In addition, data output interfaces, software functions (e.g. statistical calculations, curve displays), as well as equipment maintenance, calibration intervals and after-sales service support are also important practical considerations.