Binding is one of the important processes of post-press link, at present, our country's books mainly adopts wireless order process, the plastic is more use of adhesives for EVA hot melt adhesive, but EVA hot melt adhesive itself and the use process, there are some environmental problems.
First of all, from the point of EVA hot melt adhesive itself, in addition to the ethylene, vinyl acetate, rosin and paraffin main composition, in order to prevent the stick performance of EVA hot melt adhesive high temperature change, and add some antioxidants.There are two kinds of currently used antioxidants, one is free from contamination of propionic acid pentaerythritol ester, the other is a have certain pollution against tertiary butyl phenol class material, currently no standardized requirements EVA hot melt adhesive in a substance after use.But now we want to clear is that almost all of the paperback gum used books are EVA hot melt adhesive, EVA hot melt adhesive usage of nearly 20000 tons a year, involving more than 50 copies of this books and more than 40 volumes, so EVA hot melt adhesive itself must cause social attention to environmental protection, the relevant testing standards also need to be perfected.
Second, when printing enterprise in the use of EVA hot melt adhesive, also has the problem of environmental protection.1) preheating glue barrel no exhaust system and the use of plastic barrels, lead to EVA hot melt adhesive heating (the temperature above 150 ℃) back out of the containing harmful material such as synthetic resin class lampblack, carbon dioxide gas all send out in the workshop, the harm to workers health at any time, pollute the environment.(2) preheating glue barrels of excessive amount of glue EVA hot melt adhesive repeatedly heating, light person can lead to a colloid aging metamorphism, viscosity, the intensity is decreased, the person that weigh colloid can smoke carbide, carbon dioxide discharge in great quantities, pulverization and burst into flames, cause irreversible consequences.(3) is not stipulated in the standard clear plastic barrels or not clear plastic barrels, this practice will not only make the adhesive colloid caused precipitation is not pure compressive strength and influence, but also can make the residual carbide on the plastic bucket edge of adhesives, pulverization after fire.For the above phenomenon, the printing enterprise shall strictly implement the national standardization technical committee of CY/T40-2007 type of book binding with EVA hot melt adhesive use requirement and testing standard, the correct use of EVA hot melt adhesive.
, of course, in addition to the above mentioned coated and environmental problems that exist in the binding process, post-press link there is excessive noise equipment, part of the cover material of polluting is stronger, after the new technology research and development of green seal, about leadership, departments and printing enterprise problems such as insufficient understanding of the importance of green printing.Although some problems, such as environmental protection material research and development involved in many industries, we can't directly and timely solve, but most of the problems can be through perfecting industry standards, strengthen the industry to monitor and improve the level of standardization work to solve.So, related management department should strengthen the guide of printing enterprise, to strengthen the printing enterprise in recognition of the importance of green after printing, the real green agenda after printing, will let our people more healthy, let our environment more beautiful!
(Gold Printing Group) |
