ISO 4599 Bent strip test - Environmental stress cracking resistance test equipment
ISO 4599:1986 Plastics — Determination of resistance to environmental stress cracking (ESC) — Bent strip method
ISO 4599:1986 is a standard established by the International Organization for Standardization (ISO), primarily used to determine the environmental stress cracking (ESC) performance of plastics.
This standard evaluates the crack resistance of plastic materials under specific environmental conditions through constant pre-strain tests. This performance testing is crucial for assessing the durability and reliability of plastic materials in practical applications.
Scope and Applications
This standard is applicable for measuring the resistance of sheet and plate samples to environmental stress cracking, particularly the sensitivity of localized surface areas of the samples to ESCR. For sensitivity measurement of finished products or large materials under constant strain, it is recommended to refer to ISO 4600. The bending strip method is used to determine ESC caused by gases and liquids and by solids containing migrating substances, such as polymer adhesives and materials containing plasticizers.
Testing Methods and Steps
Sample Preparation: Prepare sheet and plate samples that comply with the standard.
Pre-strain: Subject the samples to a pre-strain treatment under specific environmental conditions.
Observation and Recording: After a certain period of pre-strain, observe and record the changes in the samples, especially the cracking conditions in localized surface areas.
Result Analysis: Assess the environmental stress cracking performance of the samples based on their changes.
Through these steps, the crack resistance of plastic materials under specific environmental conditions can be effectively measured, thereby assisting in the selection of suitable materials for different application scenarios.
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