1. Understand the use characteristics of any kind of adhesive is not multi-purpose, a kind of adhesive can only be suitable for a certain or a certain type of specific substances. Some manufacturers blindly use glue with a "try" mentality, which not only wastes time and energy, but also causes great losses. At present, BOPP / paper, polished / paper, PET / paper, high gloss printing paper / paper are often bonded by packaging plants. In addition, some manufacturers such as PVC / paper, PVC / wood, UV / paper, etc. these products can be solved by using different types of adhesives on the market.
2. Quality standard
As an adhesive, the important quality standards are: A, adhesive strength (adhesion); B. High temperature resistance; C. Low temperature resistance; D. Aging resistance; E. Retention of adhesive strength. In many domestic packaging plants, the bonding is not firm, or the product is brittle within a period of time, and the degumming is basically the above situations. Therefore, it is often said by some printing and packaging factory colleagues that "some glue is degummed in hot weather, some glue is degummed in cold weather, and some glue is not stored for a long time regardless of cold or hot weather". In fact, this is due to the lack of a deep understanding of the quality standard of glue, and even some factories producing glue do not know why they want to degumm, So it's not surprising that there are quality problems in the production process.
The adhesive commonly used in the market is a kind of multi-functional paper plastic adhesive with strong initial adhesion, high bonding strength, good high and low temperature resistance, good adhesion retention, good moisture resistance and wide bonding range. Only one or two kinds of adhesive can basically meet all the bonding requirements of current packaging plants (BOPP / paper, polished / paper, PET / paper, UV light / paper, ink / ink), which is welcomed by many manufacturers. The disadvantage of miscibility is that the cleaning ability of containers and utensils is slightly poor, and wild gum has to be wiped with solvent (due to good moisture resistance). Therefore, manufacturers in the selection of viscose varieties, according to their own actual situation, understand the characteristics and performance of various varieties, the scope of application. At the same time, we also have to have a certain understanding of the manufacturers providing viscose, such as whether the products are mature, the stability of the products, the degree of understanding of the products, technical strength, etc. Otherwise, the blind use of glue is very harmful, because the viscose products are lagging behind, and many degumming are only revealed after a few days or even months, so the use of glue should be careful.
Choose adhesive, quality is higher than price. Some manufacturers blindly believe that the higher the price, the better the quality, or the lower the price, the worse the quality. These views are very one-sided. Therefore, some manufacturers not only spend money, but also cause great losses. In fact, viscose only accounts for a small proportion of the cost of a packaging product. Therefore, we think that it is reasonable to seek a suitable price on the premise of understanding product characteristics, quality standards and performance.
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