GB/T 16998-1997 "Determination of Thermal Stability of Hot-Melt Adhesives" is applicable to the thermal stability testing of non-reactive hot-melt adhesives. It is equivalent to international standards, with a maximum test temperature of 260°C. The standard specifies the assessment of stability through periodic measurement of viscosity and softening point during heating, combined with visual observations such as color changes and smoke generation. It clearly defines sample preparation, instrument requirements (e.g., viscometer, softening point tester), test procedures, and result recording methods. It is applicable to quality testing of hot-melt adhesives used in industries such as packaging, furniture, and automotive, providing a basis for material selection and application.