ISO 8791-2 Roughness of Recycled Paper (Bekk Method)
The ISO 8791-2 standard provides a method to measure the roughness of recycled paper using the Bekk roughness meter. This test is crucial in quality control and assurance processes, especially for companies involved in waste management, recycling, and paper manufacturing. Roughness can significantly impact the performance of recycled paper products in various applications such as printing, writing, and packaging.
The Bekk method measures the roughness by using a stylus that scans across the surface of the sample. The resulting profile is then analyzed to determine the average roughness value (Ra) or peak-to-valley roughness (Rz). These values help in understanding how well the recycled fibers have been broken down and reformed into paper, which directly affects its quality.
Understanding roughness is essential for ensuring that recycled papers meet the required standards set by international bodies. The test results are used to make decisions about product specifications, process improvements, and compliance with environmental regulations.
The ISO 8791-2 standard ensures consistency in testing methods across different laboratories worldwide, which is vital for both domestic and export markets. This standardization helps manufacturers, recyclers, and suppliers ensure that their products meet the necessary quality standards and can be trusted by consumers and other stakeholders.
Scope and Methodology
The scope of ISO 8791-2 includes the measurement of roughness on recycled paper samples using the Bekk method. This standard is applicable to a wide range of recycled paper products, including newsprint, cardboard, and specialty papers.
| Parameter | Description |
|---|---|
| Test Sample Preparation | The sample should be cut into strips approximately 250 mm long by 30 mm wide. The samples must have a thickness of at least 100 μm. |
| Instrumentation | A Bekk roughness meter is used to measure the surface profile of the sample. |
| Data Collection | The instrument records the roughness values as it scans across the sample's surface. Multiple readings are taken and averaged for more accurate results. |
For detailed steps, please refer to ISO 8791-2:2015.
Quality and Reliability Assurance
The quality of recycled paper is critical in ensuring that products perform as expected. By adhering to the ISO 8791-2 standard, manufacturers can ensure consistent product quality across batches and production runs.
Roughness testing helps identify issues early in the manufacturing process. For instance, if the roughness value deviates from the target range, it indicates that there may be problems with the recycling process or fiber preparation. These insights allow for timely adjustments to processes such as pulping, beating, and pressing of the recycled fibers.
Reliable test results are essential for maintaining compliance with international standards like ISO 8791-2. This ensures that products can be marketed confidently both domestically and internationally. Compliance also supports brand reputation and trust among customers who rely on consistent product quality.
Environmental and Sustainability Contributions
- Maintains the integrity of recycled paper by ensuring proper fiber breakdown.
- Aids in reducing waste by optimizing the recycling process to produce higher-quality paper products.
- Promotes resource efficiency through better use of recycled materials.
- Sustains forests and other natural resources by reducing demand for virgin wood pulp.
By following ISO 8791-2, companies contribute positively to environmental sustainability goals. The standard supports the circular economy principle by ensuring that recycled paper products are fit for purpose, thus extending their lifecycle and minimizing waste.
