1, model glue: ABS glue is common glue, lemon alcohol has fragrance, little toxicity, and the slip joint glue has strong fluidity and melting property.
2. 502 glue: If 502 glue is exposed to air and touches a trace of water vapor, it will quickly polymerize and solidify through catalysis, which is called instant adhesion; Colorless and transparent, low viscosity, flammable liquid, one component, solvent-free, slightly irritating, volatile, volatile gas, weak tear.
Second, the role is different.
1. model glue: it can be used to bond parts by melting plastic, which is stronger than instant glue, but it takes a relatively long time to dry thoroughly.
2, 502 glue: solvent-free, easy to use; Using trace moisture in the atmosphere, it can be connected in a very short time; Can be used at normal temperature without heating; Suitable for bonding porous and absorbent materials; Single component, fast curing speed, convenient use, strong adhesion and wide range of bonding materials.
Extended data:
Matters needing attention in the use of 502 glue:
1, the thinner the adhesive layer, the higher the strength. The area of 0.02g glue per drop is also 8- 10 cm2.
2. Control the best closing time. After gluing, it should be left for a few seconds to dry, so that the glue layer can absorb the moisture in the air before closing.
3. After closing 10 minutes, the strength can reach 50%-60% of the rated value, and it takes 24 hours to completely cure.
4, the operating environment should not be too wet and too dry. Because the moisture in the air is the accelerator 7 of 502 glue, it can't be used for large-area bonding.
5. The water resistance of bonded metal is poor, so it can't be used in humid environment. After the steel bars are bonded, they will fall off by themselves after being soaked in water for 6- 1 1 month at room temperature. After bonding copper, it was soaked in water at room temperature 12 months, and the bonding strength was only about one third of the original.
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