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Introduction
Spring snap fasteners, also known as snap buttons, are widely used in clothing, bags, and other products that require fastening. They consist of two parts: a male part with a protruding stud and a female part with a socket that snaps onto the stud. The lifespan of spring snap fasteners is an important factor in determining the quality and durability of the products they are used in. In this article, we will discuss the testing methods and standards for the lifespan of spring snap fasteners.
Testing Methods
There are several testing methods that can be used to determine the lifespan of spring snap fasteners:
- Pull Test: This involves applying a force to the snap button until it separates. The force required to separate the snap button is measured and compared to the standard.
- Cycle Test: This involves repeatedly snapping and unsnapping the button until it fails. The number of cycles required to cause failure is recorded and compared to the standard.
- Salt Spray Test: This involves exposing the snap button to a salt spray to simulate corrosion. The button is then tested to see if it still functions properly.
Standards
There are several standards that can be used to determine the lifespan of spring snap fasteners:
- ISO 105-C06: This standard specifies a method for determining the resistance of snap fasteners to repeated fastening and unfastening.
- ASTM D7142: This standard specifies a method for determining the strength and durability of snap fasteners.
- GB/T 17519: This standard specifies a method for determining the durability of snap fasteners.