Cell Instruments Co., Ltd.
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The COBB Testing Machine, also known as the COBB-01 COBB Tester, is a precise instrument designed for measuring the water absorption properties of paper and paperboard. This test is essential in evaluating the water resistance of materials used in packaging, printing, and various industrial applications. The COBB Testing Machine follows the internationally recognized Cobb method, making it a crucial tool for manufacturers, researchers, and quality control teams.
The COBB Testing Machine is specifically designed to test paper and cardboard with a basis weight above 50g/m², ensuring that results are accurate and reliable for materials such as packaging papers, corrugated boards, and other paper-based products. However, it is not suitable for unsized papers or those with low sizing degrees or excessive pinholes.
The COBB Testing Machine evaluates the water absorption capacity of paper or cardboard by measuring the mass of water absorbed by the material per unit area (g/m²). The test involves placing a known area of the material in contact with water for a specified duration and then measuring the increase in weight.
The test is essential for manufacturers and quality control labs to understand the water absorption properties of paper-based materials, which can affect printing, packaging, and overall product performance. Key parameters for testing include:
The COBB Testing Machine is crucial for manufacturers looking to ensure the quality and durability of their paper and cardboard products. With the COBB Testing Machine, you can:
Whether you are in the packaging industry, food production, or any sector that uses paper and cardboard materials, the COBB Testing Machine is an indispensable tool for maintaining high-quality standards.
The COBB Testing Machine follows international standards such as GB/T1540, ISO 535, and TAPPI T441. Key parameters for the COBB Test include:
| Test Area | 100±0.2cm² |
| Water Consumption | 100±5ml |
| Metal Roller Width | 200±0.5mm |
| Metal Roller Weight | 10±0.5kg |
| Dimension | (396*315*300)mm LWH |
These precise parameters ensure that testing is consistent and reliable across different materials and test environments.
For effective and accurate testing, the COBB Sample Cutter is a complementary tool that precisely cuts a sample with a diameter of Ø125mm. This ensures that each test sample is uniform and meets the specified testing area. The COBB Sample Cutter is particularly useful in corrugated board and carton production, quality control, and research departments.
| Sampling Diameter | Ø125mm |
| Sampling error | ±0.2mm |
| Sampling Thickness | (0.1～2.0)mm |
| Dimension | (250*280*450) mm LWH |
The COBB Testing Machine complies with a variety of international testing standards, ensuring that results are reliable and comparable across different industries. These standards include:
The COBB Testing Machine is widely used in industries where the water absorption properties of paper and cardboard are crucial. This includes:
1. What is the Cobb Value?
The Cobb Value represents the mass of water absorbed by 1 m² of paper or cardboard in a specified time under controlled conditions.
2. How is the COBB Test conducted?
The test involves immersing a paper sample in water, removing excess moisture, and measuring the increase in weight to determine the water absorption rate.
3. Why is the COBB Test important?
The COBB Test helps determine the suitability of paper and cardboard for various applications, such as packaging and printing, by evaluating their water absorption properties.
4. What is the purpose of the COBB Sample Cutter?
The COBB Sample Cutter ensures that paper and cardboard samples are cut to the exact size needed for accurate testing.
5. What standards are used in COBB testing?
The COBB Testing Machine adheres to international standards such as ISO 535, TAPPI T441, and GB/T1540 for reliable and comparable results.