Overview
ISO 13362:2000 provides an internationally recognized method for determining the compression set of flexible cellular polymeric materials under humid conditions. The standard specifies procedures for subjecting test pieces to defined time, temperature, humidity, and compressive strain, and for measuring the impact of these conditions on material thickness after recovery. This method is essential for manufacturers and quality assurance professionals who require consistent performance data for materials used in humid environments.
Key Topics
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Scope and Usage
The standard applies to flexible cellular materials, including foams and sponges based on various polymers, where resistance to permanent deformation in humid conditions is critical.
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Testing Conditions
The method involves compressing the sample to a specified percentage of its original thickness, exposing it to high humidity (95% - 100% RH) and elevated temperature (around 40°C) for a defined duration, then allowing a recovery period before final measurement.
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Sample Preparation and Conditioning
Material samples must be prepared following strict guidelines regarding size, shape, and surface characteristics, and conditioned in controlled atmospheres to standardize results.
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Calculation and Reporting
The compression set is calculated as the percentage loss in thickness after recovery, relative to the original thickness. Reporting requirements ensure traceability and reproducibility of results.
Applications
ISO 13362:2000 is widely used in industries where flexible cellular polymeric materials are subjected to variable humidity, such as:
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Automotive and Transportation
For seating, gaskets, and acoustic insulation materials that must retain shape and performance in humid climates or after exposure to moisture.
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Building and Construction
In insulation and sealing products where resistance to permanent deformation from compression under moisture is essential for energy efficiency and structural integrity.
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Consumer Goods
For packaging, mattresses, cushions, and footwear components that require durability and consistent cushioning over time, even in damp conditions.
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Quality Control and R&D
Laboratories and manufacturers employ this standard to benchmark product formulations, improve material resilience, and ensure compliance with international specifications.
Related Standards
While ISO 13362:2000 is the primary standard for compression set testing under high humidity, the following are commonly referenced or complementary standards:
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ISO 1923:1981 - Cellular plastics and rubbers - Determination of linear dimensions
This standard provides procedures for measuring the dimensions of plastics and rubber materials, referenced in ISO 13362 for sample measurement methods.
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ISO/IEC Directives - Governing general procedures for drafting and approving international standards.
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Other ISO Standards for Polymeric Materials
Additional ISO documents may specify methods for testing tensile strength, elongation, or thermal stability of flexible foams and cellular products.
Practical Value
Implementing the procedures set out in ISO 13362:2000 ensures reliable, reproducible data on the compression set properties of flexible cellular materials exposed to humid conditions. This supports:
- Material selection and design optimization for specific environmental demands
- Improved product durability, safety, and customer satisfaction
- Compliance with global procurement and regulatory requirements
By standardizing the testing approach, organizations can benchmark materials, drive innovation, and maintain high quality across manufacturing batches for foam and cellular polymeric products intended for humid environments.
Open preview (PDF)Flexible cellular polymeric materials — Determination of compression set under humid conditions
