Overview
SIST EN ISO 7263-2:2019 specifies a standardized test method for determining the flat crush resistance of corrugating medium after laboratory fluting, using a B-flute geometry. This test is a critical quality control measure in the production and assessment of corrugated board materials. The method applies to all corrugating media intended for use in manufacturing corrugated fibreboard, ensuring that materials meet required strength criteria for packaging and transport applications.
Flat crush resistance is a key indicator of how well a corrugated medium will perform under pressure, especially when used as the fluted component in single- or double-wall corrugated board. By standardizing this test for the widely used B-flute, the document ensures consistency and comparability of results across laboratories and manufacturers.
Key Topics
- B-flute Geometry: The standard targets test conditions specific to B-flute, characterized by its smaller and denser wave structure compared to other flute profiles.
- Laboratory Fluting: The method involves fluting the corrugating medium in a controlled laboratory environment using precisely specified heated corrugating rolls.
- Flat Crush Resistance Measurement: Procedures are given for measuring the maximum force that a fluted test sample can withstand before collapsing, either immediately after fluting or after a defined reconditioning period.
- Test Procedures and Equipment:
- Preparation and conditioning of test samples
- Use of standardized adhesive tape to simulate board lamination
- Specification of compression testing apparatus and measurement techniques
- Reporting and Repeatability: Standardized reporting format ensures clarity and repeatability of results, supporting quality management and supply chain accountability.
Applications
- Quality Control in Paper and Packaging Industry: Enables manufacturers of corrugating medium to verify that their product meets strength requirements for B-flute corrugated board, a common type in shipping and product packaging.
- Material Comparison and Product Development: Allows for reliable benchmarking when comparing materials, suppliers, or testing the impact of process changes on the flat crush resistance of corrugating mediums.
- Regulatory and Specification Compliance: Supports compliance with customer and regulatory specifications for packaging strength and performance, critical for international trade and logistics.
- Optimizing Packaging Performance: By assessing flat crush resistance, producers can select the appropriate corrugating medium for specific applications, minimizing material use while ensuring product protection.
Related Standards
- ISO 7263-1: Covers the determination of flat crush resistance using A-flute geometry, suitable for applications with different board structures.
- ISO 3035: Specifies the method for determining flat crush resistance of finished corrugated fibreboard.
- ISO 187: Sets the standard atmosphere for sample conditioning, vital for test reliability.
- ISO 13820: Describes and calibrates compression-testing equipment used in the procedures.
- ISO 536: Details determination of grammage, often required for calculating the flat crush resistance index.
By using SIST EN ISO 7263-2:2019, paper manufacturers, converters, and quality assurance laboratories can ensure their corrugating medium is optimized for strength and durability in B-flute applications, maintaining consistent quality across global markets. The standard provides a common foundation for testing and reporting, facilitating accurate comparison and compliance in the corrugated packaging supply chain.
