This standard specifies the test apparatus, sample preparation and test procedures for the determination of the softening point of hot-melt adhesives by ball and ring method.
This standard is applicable to the determination of softening point of solid hot-melt adhesives.
2 Principle
The steel ball with a certain mass is placed on the metal ring filled with the sample. Under the specified temperature rise condition, the steel ball enters the sample and falls from a certain height. When the steel ball contacts the bottom metal baffle, the temperature at this time is regarded as the softening point.
3 Apparatus and heat transfer medium
3.1 Softening point measuring device
Softening point measuring device (see Figure 1) consists of the following components:
1 Subject content and applicable scope 2 Principle 3 Apparatus and heat transfer medium 4 Sample preparation 5 Test procedures 6 Expression of results 7 Test report Additional explanation:
