In the adhesive properties of pressure sensitive adhesives, the characterization of the initial adhesion force should not be considered as the key point. However, from the feedback of market information, there are many users who think that the initial adhesion (feel) is not good, which means that the quality is not good. In order to meet the needs of the market and the majority of tape manufacturers, Mr. Wu Bochong (Taiwan, China) hereby issues "methods for improving the initial adhesion of pressure sensitive adhesives" as a reference. At the same time, it is emphasized that the characterization of initial adhesion force should be adjusted according to the requirements of "adhesion surface conditions" and "service environment", especially for the application requirements of rough surface, low temperature adhesion (quick adhesion) or antifreeze and cold resistant pressure sensitive adhesive. There are basically two ways to improve the initial adhesion, one is to control the drying conditions, the other is to adjust the formula. In the control method of drying conditions, including the setting and control of drying temperature and coating speed. On the adjustment of the formula, the pressure sensitive adhesive is composed of solvent rubber series pressure sensitive adhesive, hot melt rubber series pressure sensitive adhesive formula, solvent acrylic series pressure sensitive adhesive formula and emulsion acrylic series pressure sensitive adhesive respectively. Their structural characteristics, formulation preparation process, and raw materials, elastomers, monomers, filling agents and auxiliaries all affect the initial adhesive force of pressure sensitive adhesive. The factors that affect the whole body.

When it comes to the regulation and control of drying conditions (drying technology), four temperature control drying areas (or more than four) should be planned, which are initial drying (50 ℃ ~ 60 ℃), medium drying (90 ℃ ~ 105 ℃), middle and late drying (105 ℃ ~ 140 ℃), and late drying (80 ℃ ~ 90 ℃) to carry out the drying after quantitative coating of PSA. In the initial drying process, the adhesive force will increase in the initial drying temperature. If the temperature control setting is to adopt the highest temperature condition within the temperature range of each zone for drying, good initial adhesion can also be obtained. However, it must be remembered that the coating speed must be increased step by step at the same time. This drying method is relatively ideal and is also the coating drying technology required by many special tapes and high temperature resistant series of tape products.