Adhesive sealant is mostly the carrier of high-molecular substance and it achieves curing relying on a chemical reaction or physical action, these will occur slowly in the process of adhesive storage. And adhesive sealant has a certain period of storage which is closely related to the humidity, temperature, ventilation and other factors. In order to ensure that the performance of adhesive is kept the same within the prescribed time, we should pay strict attention to the methods of maintaining the adhesive sealant. Storage conditions are different for its different nature and kinds.
Methods to Maintain Adhesive Sealant
First, epoxy adhesives should be stored in ventilated, dry and cool room with appropriate temperature and the period should be six months to a year. Second, phenolic resin adhesive sealant should be installed in a closed container, stored in a cool place, away from fire and its period should be six months to one year. Third, the multi-isocyanate adhesive sealant should be loaded into a brown bottle with dark cryogenic storage, rubber and cork stoppers and metal containers cannot be used. And do not permit water to enter, otherwise it will cause polymerize deterioration and prepolymer polyurethane adhesives should avoid cryogenic storage to prevent condensation. Fourth, storage temperature of urea-formaldehyde resin smt adhesive should be as low as possible. Adding 5% methanol can improve the storage stability. Fifth, chloroprene rubber adhesive containers must be sealled better. And it should be stored at room temperature, and the temperature cannot be too high, in addition, it should be away from the fire source. The period of storage is 3 to 6 months. Sixth, anaerobic adhesive should be stored in a cool, dark place, the storage period is six months, and the packaging material of the container should be polyethylene instead of iron container and cannot be filled. Seventh, SGA adhesive sealant should be sealed and stored, and the two components have to be isolated and placed in a cool, ventilated and dry place. Eighth, inorganic adhesive sealant should be sealed and stored, to prevent moisture absorption. Ninth, hot melt adhesive should be stored away from light and it should be stored in room temperature with heat insulation.
The Correct Selection of Adhesive Sealant
In terms of bonding, the adhesive sealant is the base. It is impossible to bonding firm without proper adhesive sealant. Existing adhesives are not a panacea, they have a certain range of applications, therefore, it cannot be arbitrarily used, while it must depend on the type of the adherends, the nature, size, shape, structure, direction, size, frequency, using condition, environment and media to consider, but also consider the special requirements, the possibility of the process and economy to select the appropriate adhesive.
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