DIN 54518

Paper and board materials used in packaging applications must withstand compression forces during converting, stacking, transportation, and storage. DIN 54518 defines a short span compression testing method for evaluating the compressive strength of paper and board materials over a very short test span. This testing approach provides valuable information about the inherent compression resistance of fiber-based materials while minimizing the influence of buckling effects.

For manufacturers producing corrugated containers, folding cartons, and other paper-based packaging products, DIN 54518 short span compression testing helps engineers understand material performance and optimize product reliability. The SCT-01 Short Span Compression Tester is designed to perform accurate short span compression tests on paper and board samples, providing consistent measurement results for quality control, research, and material development.

What Is DIN 54518 Short Span Compression Testing?

DIN 54518 is a standard method used to determine the short span compression strength of paper and board. Unlike traditional compression tests that may involve longer unsupported sample lengths, the short span compression method uses a very short distance between clamping points. This minimizes sample deformation caused by bending and allows the test to focus on the actual compression strength of the fiber structure.

Short span compression strength testing is especially useful for evaluating the load-bearing capability of paper materials before they are converted into final packaging products. The measured compression value reflects the ability of paper fibers to resist compressive failure when forces are applied in the machine direction (MD) and cross direction (CD).

The method is commonly applied to papers and boards with grammage ranges suitable for packaging applications, particularly materials used in containerboard and box manufacturing.

Why Is Short Span Compression Strength Testing Important?

Paper-based packaging products experience various compression forces throughout their lifecycle. During transportation and warehouse storage, boxes are exposed to vertical stacking loads, vibration, and external pressure. The compression performance of the paper material directly affects packaging safety and durability.

Short span compression strength testing provides important quality control information, including:

• Evaluation of paper fiber strength and structural performance
• Prediction of packaging material load resistance
• Comparison of different paper grades and manufacturing processes
• Verification of raw material consistency
• Support for packaging design optimization

For packaging engineers, compression strength data helps determine whether a paper grade can meet application requirements. For paper manufacturers, the test provides a reliable method to monitor production stability and improve product quality.

Testing Principle of DIN 54518

The principle behind the DIN 54518 short span compression test machine is based on applying a compressive force to a small paper or board specimen until compression failure occurs.

The SCT-01 Short Span Compression Tester uses two precision clamps to secure a narrow test strip. The specimen is compressed over a short span distance, and the instrument records the maximum compression force achieved before failure.

The testing process includes:

1. A paper or board specimen is prepared with a defined width and length.
2. The specimen is positioned between two aligned compression jaws.
3. The clamps securely hold the sample with controlled pressure.
4. The compression jaws move together at a controlled speed.
5. The maximum compression force is recorded.
6. The result is used to evaluate the short span compression strength of the material.

Because the unsupported span is extremely short, the influence of sample bending is reduced, allowing the test result to better represent the material’s true compression resistance.

SCT-01 Short Span Compression Test Machine Features

The SCT-01 is developed for laboratories requiring reliable and repeatable short span compression testing of paper and board materials. The instrument combines precise mechanical design with automated control functions to improve testing efficiency.

Precision Clamping System

The tester uses two high-friction clamps designed to securely hold a 15 mm wide test specimen. Each clamp includes a stationary jaw and a movable jaw with a 30 mm clamping surface.

The clamping force is controlled at 2300 ± 500 N, ensuring stable sample positioning throughout the test. The parallel alignment of the clamping surfaces helps reduce measurement errors caused by uneven sample holding.

PLC Control and HMI Operation

The integrated PLC control system provides accurate test operation and simple user interaction through the HMI interface. Operators can easily configure testing parameters and obtain repeatable results.

Regulowane parametry testowania

Different paper and board materials may require different test conditions. The SCT-01 allows adjustable testing settings to support various laboratory requirements.

Key adjustable features include:

• Test speed adjustment
• Compression distance control
• Data display options
• Multiple measurement units

Reliable Data Output

The instrument provides direct result display in commonly used units, including:

• Newton (N)
• Kilogram-force (kgf)
• Pound-force (lbf)

An optional RS-232 communication interface allows connection with external software systems for data management and laboratory integration.

Technical Specifications of SCT-01

Parametr	Specyfikacja
Zakres testu	1~500 N (or as required)
Odległość kompresji	0.3~2 mm
Długość mocowania	30 ± 0,5 mm
Prędkość testu	3 ± 0,1 mm/min
Rozdzielczość	0,01 N
Wielkość próby	15 × 75 mm (W × L)
Ciśnienie gazu	0.4~0.7 MPa
Rozmiar portu gazu	Φ6 mm
Zasilanie	AC 110~220V, 50/60Hz

These specifications allow the SCT-01 to provide accurate compression measurements for laboratory testing environments, quality inspection departments, and research facilities.

Applicable Materials for Short Span Compression Testing

The short span compression test machine is mainly used for paper and board materials, especially those requiring evaluation of compression resistance.

Typical test materials include:

• Containerboard
• Corrugated board paper components
• Packaging paper
• Paperboard
• Kraft paper
• Coated paperboard
• Structural paper materials

The method is suitable for evaluating materials used in packaging structures where compression strength contributes to overall product performance.

Applications in Packaging Quality Control

Packaging manufacturers rely on compression testing data to maintain product reliability. The SCT-01 supports multiple applications throughout the packaging supply chain.

Paper and Board Manufacturing

Paper mills can use short span compression testing to monitor production consistency and compare material strength between different grades.

Corrugated Packaging Development

Packaging engineers use compression strength data when selecting linerboard and medium materials for corrugated box designs.

Laboratoria kontroli jakości

Third-party laboratories and inspection organizations can apply DIN 54518 testing methods to verify material performance and support customer requirements.

Badania i rozwój

R&D teams can evaluate new fiber formulations, recycled paper materials, and manufacturing processes by comparing compression strength performance.

DIN 54518 and Related Compression Testing Standards

Different industries use various standards to evaluate paper and board compression properties. The SCT-01 supports testing methods related to the following standards:

Standard	Zastosowanie
DIN 54518	Short span compression strength testing of paper and board
ISO 9895	Compression strength testing of paper and board materials
TAPPI T826	Short span compression testing method
BS 7325	Paper and board compression testing requirements
GB/T 2679.10	Paper and board compression-related testing
QB/T 2386	Paper product testing requirements

When selecting a testing method, laboratories should consider material type, industry requirements, and applicable quality specifications.

Benefits of Using SCT-01 for Short Span Compression Testing

Choosing a dedicated short span compression test machine provides several advantages compared with general-purpose compression equipment.

Key benefits include:

• Accurate measurement of intrinsic material compression strength
• Reduced influence from bending deformation
• Repeatable test results for quality control
• Efficient operation for laboratory environments
• Compatibility with international testing practices
• Support for customized testing requirements

For companies producing packaging materials, reliable compression data helps reduce material failures, improve packaging performance, and maintain consistent product quality.

Selecting the Right Short Span Compression Test Equipment

When choosing equipment for short span compression testing, laboratories should consider:

• Required testing standards
• Material thickness and grammage range
• Compression force range
• Sample preparation requirements
• Data management needs
• Future testing applications

A professional testing solution should provide not only accurate measurement but also long-term reliability, easy operation, and technical support.

Cell Instruments provides material testing solutions for paper, packaging, medical, pharmaceutical, and industrial applications. Customized fixtures, automated systems, and application-specific testing solutions are available for laboratories with special testing requirements.

conclusion

The short span compression tester evaluates material resistance against compression failure in machine and cross directions, providing reliable data for packaging development, production quality control, and laboratory analysis. With precise clamping, controlled compression, and accurate force measurement, the tester helps engineers assess containerboard and paper material performance for demanding packaging applications. Cell Instruments offers professional testing equipment, including the SCT-01 Short Span Compression Tester, along with customized fixtures and testing solutions for different laboratory requirements.