Cardboard Bursting Meter for the determination of various cardboard and single and multi-layer corrugated cardboard
The paperboard burst tester applies pressure from the hydraulic system and is the maximum pressure when the elastic film breaks through the circular area of ​​the paper pattern. Paperboard Bursting Tester is a special testing instrument for measuring various cardboard and single-layer and multi-layer corrugated paperboard. The paperboard bursting resistance tester can also be used for non-paper material such as silk and cotton cloth, as long as it is put into the material, That is, automatic detection, automatic test, automatic oil pressure return and automatic calculation, storage of test data, printing, paperboard burst instrument instrument digital display and can automatically print test results and data processing. The commonly used bursting resistance meter is Mullen bursting resistance meter (also known as cardboard burst strength tester, crack resistance meter, burst strength tester, etc.).
First, the working principle of the paperboard burst resistance meter
Cardboard Bursting Resistance Meter is based on Pascal's Law: The pressure applied to a closed liquid can be transmitted in all directions by the liquid according to its original size. The paperboard bursting instrument is filled with methyl silicone oil as the medium for pressure transmission in the cylinder of the instrument's sealed cylinder and platen holder. When the motor drives the piston to advance at a uniform speed, the film is raised due to the pressure of the silicone oil; The sample clamped on the top of the film and clamped by the upper and lower chucks was evenly stressed until the specimen broke. The paperboard crack resistance meter processing chip locks the maximum pressure value and displays the pressure value through the LCD screen. This pressure value is the bursting resistance of the sample.
Second, the paper board burst meter calibration requirements
In fact, the paperboard bursting resistance meter has been specified by the national relevant verification regulations, light industry standards, and the national standard of GB/T1539. The calibration method of the burst resistance meter has been clearly defined - a standard load meter with an accuracy of not less than 0.1%. The calibration error is proofread. If the paperboard burst tester is not calibrated according to this method, it is inconsistent with the proofreading invalid proofreading (such as the so-called “aluminum foil calibration sheet†currently circulated in the market, and the paperboard burst tester is an aluminum foil. The film can only be used as a fixed sample to measure, and can not be used as a calibration basis for the data detected, because the accuracy of aluminum foil does not reach 0.1% at all, so when you buy and use the burst resistance meter must be cautious).
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Stearic acid is widely used in the manufacture of PVC plastic pipes, plates, profiles and films. It is a PVC heat stabilizer with good lubricity and good light and heat stabilization. In plastic PVC pipes, stearic acid helps prevent "scorching" during processing. It is an effective heat stabilizer added in the processing of PVC film, and it can also prevent the finished film caused by exposure to sulfide. Discoloration.
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