Analysis of common causes of PVC edge strip degumming
As we all know, PVC edge sealing strips generally use hot melt adhesive for bonding, and the edge sealing hot melt adhesive sold on the market according to the manufacturer's process, filler and other factors, the quality of the produced edge sealing hot melt adhesive is different, many plates will appear in the process of using the phenomenon of degumming, the following phenomenon analysis of several common reasons:
- The oily veneer edge is fitted with incompatible hot melt adhesive.
2, the technical problem is that the temperature of the edge banding machine does not reach the predetermined temperature, resulting in poor adhesion of the edge strip and hot melt adhesive, the temperature of the high temperature glue is generally required in 180 ~ 210 degrees, and the temperature of the edge banding machine can be adjusted appropriately according to the operating environment. This is mainly to see the problem of mechanics manufacturers must strictly check, this reason is the problem of manufacturers.
3, that is, the edge sealing machine glue is too thin, the original did not produce qualified edge sealing strip. This is also an important reason, due to the temperature and glue is too thin caused by degumming phenomenon is also very common, can be used to increase the amount of glue to solve.
4, the uneven plate may also cause the edge strip to fall off, which is also a problem that must be paid attention to, this reason can only explain the installation of technical problems.
5, unqualified melamine edge bottom release causes degumming substances.
6. Unqualified PVC edge coating (medium) is incompatible with hot melt adhesive.
7, edge strip degumming is mainly that the processor is too thin, especially the PVC edge strip back adhesive (treatment agent) is too thin, and the affinity with hot melt adhesive decreases, which is one of the main reasons for edge strip degumming.
8. When veneer edge sealing is primer, the proportion of Tianna water or other diluent is too large, and the diluent is too strong, resulting in hot melt adhesive expansion, and then the adhesive edge will be bonded and loosened.
9, the cause of hot melt adhesive in the bonding process caused by cold (rapid cooling), should maintain stable bonding conditions, (including temperature, pressure, and working speed, etc.) otherwise it will also affect the bonding effect.
10, the quality of PVC sealing strip itself. One of the production standards of PVC edge sealing strip in processing is good adhesive performance. Like some inferior PVC edge strip back adhesive coating is too thin, the effect is naturally not good in bonding.
Therefore, when choosing the edge strip, it is not only necessary to consider the price factor, but the quality is the most important factor.
How is PVC edge strip produced?
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