What is ISO 2493 Paper and Board – Determination of Bending Resistance?
ISO 2493 specifies a method for determining the bending resistance of paper and board using a standardized test apparatus. The bending resistance, also known as stiffness, is an important property of paper and board materials, which affects their performance in various applications.
The test involves measuring the force required to bend a test specimen to a specified angle under standardized conditions. The bending resistance is expressed as the bending moment required to achieve a specified deflection.
ISO 2493 provides guidelines for preparing test specimens and conducting the test, as well as calculations for determining the bending resistance. The standard is applicable to a wide range of paper and board materials. Including uncoated and coated papers, carton board, and corrugated board.
The results of the bending resistance test can be used to evaluate the suitability of paper and board materials for specific applications. Such as packaging, printing, and bookbinding.
Requirements of this ISO Standard
Test apparatus: The test apparatus should consist of a clamp device and a bending tester. The clamp device should be capable of holding the test specimen securely without damaging it, while the bending tester should be capable of applying a controlled bending force to the specimen.
Test specimens: The test specimens should be prepared in accordance with the requirements of the standard, which include dimensions, conditioning, and cutting methods. The specimens should be free from any defects or damage that could affect the test results.
Test conditions: The test should be carried out under controlled conditions of temperature and humidity, and in a standardized atmosphere.
Test procedure: The test procedure should follow the guidelines specified in the standard. Which include the rate of bending, the angle of deflection, and the number of test cycles. The bending moment should be recorded for each cycle.
Calculation of results: The bending resistance should be calculated based on the recorded bending moment and the dimensions of the test specimen. Using the equations specified in the standard.
Reporting of results: The test results should be reported in a clear and concise manner. Including the bending resistance value, the standard deviation, and any other relevant information. The report should also indicate the test conditions and any deviations from the standard procedure.
Therefore, ISO 2493 provides a standardized method for the determination of bending resistance of paper and board. Which ensures consistency and accuracy in the test results.
Benefits of this ISO Standard
Quality control: The standard provides a standardized method for measuring the bending resistance of paper and board materials. Which helps to ensure consistent quality in the products.
Performance evaluation: The bending resistance test can be used to evaluate the performance of paper and board materials in various applications. Such as packaging, printing, and bookbinding. Thus, This helps to ensure that the materials are suitable for their intended use.
Compliance: ISO 2493 is an internationally recognized standard, and compliance with it can help paper and board manufacturers to demonstrate their commitment to quality and customer satisfaction.
Innovation: The standard encourages research and development in the field of paper and board materials. As it provides a standardized method for evaluating new materials and technologies.
Trade facilitation: The use of a standardized method for measuring bending resistance can facilitate trade. So, By providing a common language for paper and board manufacturers, buyers, and regulatory bodies.
ISO 2493 provides a range of benefits for paper and board manufacturers, buyers, and end-users. So, By ensuring consistency and accuracy in the measurement of bending resistance and promoting innovation in the field.
What is ISO 2493-1:2010 Part 1: Constant rate of Deflection?
ISO 2493-1:2010 Part 1 specifies a method for determining the bending resistance of paper and board using a constant rate of deflection (CROD) apparatus. So, The CROD method is one of two methods for determining bending resistance under ISO 2493, the other being the three-point bending method.
The CROD method involves applying a constant rate of deflection to a test specimen in a single test cycle, while measuring the force required to achieve the specified deflection. The test apparatus consists of a clamping device and a deflection mechanism that applies the controlled bending force to the specimen.
ISO 2493-1:2010 provides guidelines for preparing test specimens and conducting the test. As well as calculations for determining the bending resistance using the CROD method. The standard is applicable to a wide range of paper and board materials. Including uncoated and coated papers, carton board, and corrugated board.
In addition, The CROD method specified in ISO 2493-1:2010 Part 1 is widely used in the paper and board industry for quality control and product development purposes. It provides a quick and reliable method for measuring the bending resistance of paper and board materials. And can be used to evaluate the suitability of materials for specific applications. Such as packaging, printing, and bookbinding.
What is ISO 2493-2:2011 Part 2: Taber – type Tester?
ISO 2493-2:2011 Part 2 specifies a method for determining the bending resistance of paper and board using a Taber-type tester. The Taber-type tester is a specialized apparatus that is designed to apply a controlled bending force to a test specimen using a circular rotating drum.
The test involves clamping a rectangular test specimen between two jaws and placing it on the rotating drum of the Taber-type tester. As the drum rotates, the test specimen is bent around the drum, and the force required to achieve a specified deflection is measured. The bending resistance is expressed as the bending moment required to achieve the specified deflection.
ISO 2493-2:2011 Part 2 provides guidelines for preparing test specimens and conducting the test. As well as calculations for determining the bending resistance using the Taber-type tester method. The standard is applicable to a wide range of paper and board materials. Including uncoated and coated papers, carton board, and corrugated board.
The Taber-type tester method specified in ISO 2493-2:2011 Part 2 is widely used in the paper and board industry for quality control and product development purposes. Therefore, It provides a quick and reliable method for measuring the bending resistance of paper and board materials. Also, it can be used to evaluate the suitability of materials for specific applications. Such as packaging, printing, and bookbinding.
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