ASTM D1693 Plastic Environmental Stress-Cracking testing machines
ASTM D1693 Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics
ASTM D1693 determination of the susceptibility of ethylene plastics, to environmental stress-cracking when subjected to the conditions herein specified. Under certain conditions of stress and in the presence of environments such as soaps, wetting agents, oils, or detergents, ethylene plastics may exhibit mechanical failure by cracking.
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.
ASTM D1693 industries is a critical standard for testing the environmental stress cracking resistance of high-density polyethylene (HDPE) across various industries, ensuring the product's lifespan, reliability, and safety in applications such as pipelines, tanks, and containers.
ASTM D1693 materials commonly tested under ASTM D1693 are high-density polyethylene and other thermoplastic materials, which demonstrate important knowledge of their performance and durability, enabling them to withstand specific applications.
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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