Epoxy encapsulantIn the application process, the appearance is a non-negligible index, which generally requires flat, bright, no particles, no pits and other standards. If the appearance of epoxy potting compound is undesirable after curing, then the function of the colloid will have a certain impact.
1. Printing. Epoxy encapsulant surface printing refers to the appearance of a piece of printing on the surface after the colloid is cured, generally accompanied by color differences. This kind of problem is directly related to the sensitivity of the curing agent and moisture, the control measures are the moisture absorption of the curing agent and the moisture size of the sizing environment, when the curing agent is hygroscopic, and the environmental humidity is also large, the probability of the appearance of the mark after curing is also greater, so the epoxy encapsulant appears to be printed, choose the curing agent with low moisture absorption, or reduce the moisture.
2. Wrinkling
Wrinkling of epoxy potting compound refers to the appearance of waves, unevenness, honeycomb and other phenomena on the surface after the colloid is cured. Most of these problems are related to the degree of curing intensity, and the more intense the product reaction, the shorter the effective self-leveling time, resulting in the wrinkles that cannot be leveled away. The more epoxy potting compound is mixed, the more intense the reaction, so for products with a lot of potting, multiple potting options can be selected. In addition, from the perspective of its own performance, wrinkling is also related to the size of curing shrinkage.
Three, needle eye
The eye of the epoxy potting compound refers to the convex and dense needle tip on the surface after the colloid has cured. This kind of problem is related to bubbles, the formation of the eye of the needle is that the small bubbles can be broken in the future during the discharge process, and the colloid will thicken and solidify, so to solve the problem of the eye of the needle, it should be solved from three aspects, one is to extend the curing time, the second is to improve the defoaming property of epoxy potting compound, and the third is to carry out vacuum deaeration treatment before use.
The appearance requirements of epoxy encapsulant are basically met by users, how to choose epoxy encapsulant that is both beautiful and reliableThe manufacturer's production technology and quality control ability are extremely important, for more details, please leave a message in the comment area to consult Schnees.