Silicone sealant various questions answered
2024-05-06
1, smell (for acid glue) :
Acidic glue because it contains acetic acid ingredients, in the volatilization process will produce a sour taste, but in general, the better the quality of the sour taste of the lighter, the worse the quality of the sour taste of the stronger (because of the added acetic acid ingredients); At the same time, the smell of good quality glue quickly disappears during the curing process, and the sour taste of poor quality glue will evaporate for a much longer time.
2, gloss:
Different quality of glue after the gloss is different, high quality glue no matter what kind of color after curing luster, low quality glue some play out luster, some lose luster after curing one or two months.
3, check particles:
High quality glass glue is fully and evenly stirred chemical synthetic material, fine and uniform texture, smooth and smooth after curing. The poorer the quality of the glass glue, the more particles and impurities can be seen, and the surface of the rubber strip after sizing and curing is not smooth and smooth than that of the good quality glue.
4. Look at the bubbles:
The main component of high quality glass glue is silicone, the amount of other additive materials is very small, the good stability of pure silicone is very little affected by changes in external conditions during the storage period, and the phenomenon of "snap" and "snap" bubble sound will not be produced when the bottle is mixed with air. However, because the ordinary quality silicone glue is not 100% silicone glue, the additives in the silicone and the PE soft glue of the plastic bottle may have a chemical reaction, so that the plastic bottle is expanded and increased, the air remaining in the space can penetrate the glue to create a gap, and the bubble sound of "snap, snap" will be issued when the glue is made, so that the shelf life is shortened. What is more, a few manufacturers deliberately hit the bottom of the bottle when filling the glue, and there is air in the middle of the bottle, thus greatly reducing the amount of glue, and the natural bubble of the glue is inevitable.
5, test the curing effect:
After local sizing, the user should first view the surface drying time of the glass glue according to the instructions on the product packaging. If the time is too short or the timeout is too much, it indicates that the quality of the glass glue is problematic (of course, the impact of environmental conditions should also be considered); Then after curing is completed (curing time manufacturers should also indicate), try the hardness and elasticity of the glue by hand, too hard or too soft glue is not a good glue; Then the section of the glue can be cut to test whether the curing effect inside and outside the glue is consistent.
6, test tension and adhesion:
The tensile strength and peel strength (adhesive strength) of silicone adhesive after curing also vary with the quality of silicone. High quality adhesive has strong tensile force, large tensile range and peel strength.
