Corrugating medium is a crucial component in the production of corrugated board, serving as the distinctive “wave” structure between the two liners. This medium is responsible for providing the necessary strength and rigidity to the board, ensuring the efficient transportation and protection of various goods.

One of the key factors to consider when producing corrugating medium is the basis weight range. Typically, the basis weight for corrugating medium falls within the range of 112-180 g/m2. This weight determines the thickness and sturdiness of the medium, impacting the overall quality of the corrugated board.

The choice of raw material for corrugating medium varies, with both semichemical pulp and recycled fiber being commonly used. When semichemical pulp is the sole raw material, the resulting corrugating medium is often referred to as “fluting”. The selection of raw material is heavily influenced by cost, as corrugating medium is a bulk product. Manufacturers strive to find a balance between quality and affordability to meet market demands.

In some cases, low-quality mixed waste can serve as a raw material for corrugating medium. However, to enhance the strength properties, surface sizing is employed. Surface sizing allows for the application of a thin layer of adhesive to the surface of the medium, strengthening its overall structure and improving its performance.

An important strength property of corrugating medium is its compression strength. This property measures the ability of the medium to withstand pressure and is determined through the Concora test. The test involves subjecting the medium to increasing pressure until it reaches its breaking point. This information helps manufacturers determine the suitability of the medium for specific applications, ensuring that the corrugated board can withstand the demands of transportation and storage.

In conclusion, corrugating medium plays a vital role in the production of corrugated board, providing the necessary strength and structure. The choice of raw material, whether semichemical pulp or recycled fiber, is influenced by cost considerations. Furthermore, the compression strength of the medium is a crucial strength property that determines its performance in various applications. By understanding the importance of corrugating medium and its various characteristics, manufacturers can produce high-quality corrugated board that meets the needs of a wide range of industries.