Extensive use of hot melt adhesive, easy to use, easy to save. With the advancement of China's economic development began to hot melt increasingly applied to various industries and fields of national economic construction. But as more and more hot melt application more users start thinking about how hot melt determine the problem. In fact, the quality of judging performance hot melt through the following main aspects: 
   1. viscosity (Brookfield Thermosel Viscometer):. Temperature, rotor speed 
   2 ball softening point (Ring & Ball SP):. Glycerol bath temperature 5 ℃ / min 
   3 Gardner color (Molten Gardner Color):. Melt colorimetric 
   4 Heat resistance (Heat-Resistance):. Indication is the maximum applicable temperature viscosity products 
   5 shear failure temperature (Shear Adhesion Failure Temperature, SAFT) 
   6 debonding temperature (Peel Adhesion Failure Temperature, PAFT) 
   7 Thermal stability (Heat-Stability) 100G placed in the 200ml beaker of hot melt adhesive, is placed in an oven at 175 ℃, 2, 3 days to observe the changes color, viscosity, and carbonized crust. 
   8 adhesive properties (Adhesion) Peel strength (Peel Strength) 180 ℃ or 90 ℃ peel, 25mm wide sample, 2kg pressure roller press twice, 300mm/min, stripping 
   9 resistance to aging (Aging-resistance) the adhesive system (good adhesion) were placed in a constant temperature oven at 50 ℃ 4 weeks of accelerated aging, do some samples taken weekly peel adhesive strength test and the unaged samples contrast. 
  10. Temperature resistance (Cold-resistance) the adhesive system (good adhesion) were placed in different storage temperature refrigerator for 1 hour, stripping at the same temperature, impact test, to check the case of bond failure. 
    These are the instruments to rely on professional judgment. In addition, the daily work of our hands can also be measured using visual and simple detection method to determine, but this is not accurate means of detection. And there is a need for a deeper understanding of hot melt who can use the. Visual presence of impurities hot melt adhesive, hot melt adhesive toughness test the extent of the hand and sticky hands. This method only simple discrimination.