Paper Strength Tester About Bending Stiffness Detection Measuring Bending Resistance And Stiffness Of Paper And Board

Introduction to Bending Resistance Testing

The WTD-01 Bending Resistance Tester is an advanced instrument designed to measure the bending stiffness and resistance of paper and board. This device operates based on the two-point loading principle and is vital for industries that rely on the structural integrity of paper products. By accurately determining bending resistance, this tester helps manufacturers ensure their products maintain optimal rigidity and stability during use.

With a measurement range of 20 mN to 10,000 mN, the WTD-01 is versatile enough to cater to various testing requirements across multiple sectors, including packaging, food, and pharmaceuticals. While it is not suitable for corrugated board, it effectively tests the components of such materials, ensuring comprehensive analysis.

Key Terms Explained

• Bending Force: The force required to bend a rectangular test piece clamped at one end.
• Bending Resistance: The mean of all valid readings of the measured bending force, calculated and expressed in newtons (N) or millinewtons (mN).
• Bending Length: The constant radial distance between the clamp and the point on the test piece where force is applied.
• Bending Angle: The angle through which the clamp rotates while moving from its initial position to where the bending resistance is measured.
• Free Length: The total length of the test piece projecting from the clamp.

Importance of Measuring Bending Resistance

Bending resistance is critical for ensuring that paper and board products retain their shape and functionality under stress. High bending stiffness can significantly enhance performance in various applications, particularly in packaging and printing, where material deformation can lead to product failure.

By utilizing the WTD-01 Bending Resistance Tester, companies can maintain stringent quality control standards, ensuring that their products meet the necessary specifications for durability and performance.

Technical Features of the WTD-01 Bending Resistance Tester

• Multi-Angle Measurement: The tester allows simultaneous setup for up to three test angles, commonly including 7.5°, 15°, and 30°.
• Flexible Bending Time: Users can choose different bending times, tailored to the material's elasticity and testing needs.
• User-Friendly Interface: Equipped with a 7-inch color touchscreen, the interface provides intuitive menu navigation and easy access to testing options.
• Integrated Printing Capability: The WTD-01 features a modular thermal printer for quick and efficient printing of test results.

Test Principle

The WTD-01 measures the force necessary to bend a test piece, clamped at one end, through a specified angle (typically 15°) at a defined bending length (50 mm or 10 mm). The bending resistance is computed as the average of the measured forces, providing a reliable indication of the material’s performance.

Applications Across Industries

• Packaging: Ensures that packaging materials provide adequate protection and maintain their shape, critical for the safe transport of goods.
• Printing: Essential in high-speed printing applications, where appropriate bending stiffness prevents operational issues, such as paper jams.
• Paperboard Products: Products like cartons and display boards rely on sufficient bending resistance to guarantee structural integrity during use.

Specifications

FAQs

What factors influence the bending stiffness of paper and board?

Bending stiffness can be affected by various factors, including material composition, thickness, and moisture content. Higher fiber content and optimal thickness usually enhance stiffness.

How is bending resistance measured?

Bending resistance is measured by applying a known force at a specific angle to a test piece, and calculating the average resistance based on multiple readings.

What industries benefit from bending stiffness testing?

Industries such as packaging, printing, and any production involving paper-based products significantly benefit from bending stiffness testing.

Can the WTD-01 Tester be used for corrugated board?

While the WTD-01 is not suitable for testing corrugated board directly, it can be applied to its components.

What is the importance of bending stiffness in packaging?

In packaging, bending stiffness is crucial to ensure that the materials can withstand handling and transportation without deforming, maintaining product integrity.