Attention please! For the determination of the tensile strength of GBT453-2002 paper and paperboard (constant speed loading method), today the editor draws the key points for everyone!
Key One: Principle
The tensile strength tester stretches the sample of the specified size to break under the condition of constant speed loading, and measures the tensile strength, and records the maximum elongation at break at the same time.
Key Two: Definition
(1) Tensile strength: the maximum tension that paper or cardboard can withstand.
(2) Fracture length: The length of a paper strip with the same width required to break the paper by its own quality. It is calculated quantitatively from the tensile strength and the sample after constant humidity.
(3) Elongation: The elongation of paper or cardboard when it is under tension to break, expressed as a percentage of the original sample length.
(4) Tensile index: Tensile strength divided by quantitative, expressed in Newton meters/g.
Key Three: Test Steps
(1) Calibration and adjustment of the instrument
Install the instrument according to the instructions, and calibrate the force measuring mechanism of the instrument according to Appendix A. If necessary, the elongation measuring mechanism should also be calibrated. Adjust the load of the clip. During the test, the test paper should neither slide nor be damaged. Clamp the appropriate Zhuma on the clip, Zhuma drives the loading indicating device to record its reading. When inspecting the indicating mechanism, the indicating mechanism should not have excessive backlash, hysteresis or friction. If the error is greater than 1%, a correction curve should be made.
(2) Measurement
The test is carried out under standard atmospheric conditions of temperature and humidity treatment of the sample. Check the zero position and front and back levels of the measuring mechanism and recording device. Adjust the distance between the upper and lower clamps, clamp the sample in the clamps, and prevent the test area between the clamps from touching the test area with your hands. Apply a pre-tension of about 98mN (10 g) on the sample so that the sample is vertically clamped between the two clamps. First do a predictive test to find the loading speed at which the sample breaks within (20±5) s. From the beginning of the measurement to when the sample breaks, the maximum force applied should be recorded. If necessary, the elongation at break should be recorded. There should be at least 10 measurements in each direction of paper and cardboard, and the results of these 10 should all be valid. If it breaks within 10 mm of the clamp, it should be discarded.
(3) Result calculation
Key Four : Recommendations for the equipment used in the test
DRKWD6-1 six-station tensile testing machine can be applied to plastic films, composite films, flexible packaging materials, adhesives, adhesive tapes, stickers, medical patches, protective films, release paper, rubber, paper and other products Stretching, peeling, tearing, heat sealing, bonding and other performance tests.
Features :
1. Double-column and double-ball screw with transmission to ensure high-precision and stable operation.
2. Integrate multiple independent test functions such as stretching, deformation, peeling, tearing, etc., providing users with a variety of test items to choose from.
3. Provide data such as constant elongation stress, elastic modulus, stress and strain.
4. The ultra-long stroke of 1200mm can meet the test of materials with ultra-high deformation rate.
5. The function of 6 stations and sample pneumatic clamping is convenient for users to test multiple samples at the same time.
6. The 1~500mm/min stepless speed change provides convenience for users to test under different test conditions.
7. The embedded computer control system effectively guarantees the safety of the system and improves the reliability of data management and test operations. 8. Professional control software provides superposition analysis of group test curves and statistical analysis of maximum, minimum, average, standard deviation, etc.
DRKWL-500 Touch Horizontal Tensile Testing Machine is a mechatronics product. It adopts modern mechanical design concepts and ergonomics design principles, and uses advanced microcomputer processing technology for careful and reasonable design. It is a novel design , A new generation of tensile strength testing machine with convenient use, excellent performance and beautiful appearance.
Features:
1. The transmission mechanism adopts double linear guide rails and ball screws, and the transmission is stable and accurate; it adopts a stepping motor, which has low noise and precise control;
2. Full-touch large-screen LCD display, Chinese and English menus. Real-time display of force-time, force-deformation, force-displacement, etc. during the test; the latest software has the function of real-time display of stretching curve; the instrument has powerful data display, analysis and management capabilities.
3. Adopt 24-bit high-precision AD converter (resolution up to 1/10,000,000) and high-precision load cell to ensure the rapidity and accuracy of instrument force data collection;
4. Adopt modular all-in-one printer, easy to install, low failure; thermal printer;
5. Obtain the measurement results directly: After completing a set of experiments, it is convenient to directly display the measurement results and print statistical reports, including the average value, standard deviation and coefficient of variation.
6. High degree of automation: The instrument design uses advanced domestic and foreign components, and the microcomputer performs information sensing, data processing and action control. It has the characteristics of automatic reset, data memory, overload protection and fault self-diagnosis.
7. Multifunctional, flexible configuration.
The DRK101B tensile testing machine is a mechatronics product. It adopts modern mechanical design concepts and ergonomics design principles, and uses advanced dual-CPU microcomputer processing technology for careful and reasonable design. It is a novel design, easy to use, A new generation of tensile testing machine with excellent performance and beautiful appearance.
Features:
1. The transmission mechanism adopts ball screw, the transmission is stable and accurate; the imported servo motor is adopted, the noise is low, and the control is precise
2. Touch screen operation display, Chinese and English interchange menu. Real-time display of force-time, force-deformation, force-displacement, etc. during the test; the latest software has the function of real-time display of tensile curve; the instrument has powerful data display, analysis and management capabilities.
3. Using 24-bit high-precision AD converter (resolution up to 1 / 10,000,000) and high-precision weighing sensor to ensure the rapidity and accuracy of instrument force data collection
4. Adopt modular integrated thermal printer, easy to install and low failure.
5. Obtain the measurement results directly: After completing a set of experiments, it is convenient to directly display the measurement results and print statistical reports, including the average value, standard deviation and coefficient of variation.
6. The degree of automation is high. The instrument design uses advanced domestic and foreign devices. The microcomputer performs information sensing, data processing and action control. It has the characteristics of automatic reset, data memory, overload protection and fault self-diagnosis.
7. Multifunctional, flexible configuration.
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Post time: Dec-13-2021
