Hot-melt adhesives are commonly known as EVA (ethylene-vinyl acetate copolymers). The formulations vary slightly depending on the industry in which they are used. However, hot-melt adhesives for printing should also be differentiated according to different applications. Warm- melt adhesives are usually known as EVA( ethylene- soft acetate copolymers). The formulations differ slightly based on the market in which they may be used . Nevertheless, hot- melt adhesives designed for printing must also be differentiated based on numerous applications.
you. Should various kinds of stuff provide for binding diverse papers?
As an example, binding simple paper or coated paper? Copperplate paper should be made in copper plate glue, the best- mounted glue pot wifi glue machine or maybe the bottom-- mounted glue pot wireless stuff machine? The very bestglue pot upon the most notable- mounted stuff pot should utilize the stuff with firm opening time.
( Note: The open time of the warm melt adhesive identifies the period when the glue liquid condenses. This time around is usually six- 13 seconds.)
two. The length of time when the completed books and magazines be situated before cutting?
Ought to be slice in the- dissolve adhesive cooling hardening stereotypes, this type of time should generally rest assured in significantly more than 3 moments, otherwise you will have publication spine deformation, plastic sticky blade and other issues.
( Note: The chilling and hardening moments of AVOI hot melt adhesive is normally a lot more than three minutes)
several, plastic pot temperature must certanly be how exactly to adjust?
First, based upon the technical specifications provided simply by the manufacturer of hot-- melt adhesives like a reference, as well high or too low will certainly reduce the bond strength and ultimate tensile strength, so the temperature of the hot-- melt adhesive must be handled in a particular range on order to achieve the very best Connecting effect.
In addition, based upon the feel of the paper, the glue temperature should also become different. For example, the inorganic content of coated paper is all about 10 times higher than the fact that of offset paper and composing paper, and the inorganic materials has good thermal conductivity. This will accelerate the cooling from the hot melt adhesive. Curing velocity, so this case should somewhat raise the temperature of the plastic-type material pot.
4. What requirements does the EVA hot melt cement adhesive have on the utilization setting?
In general, the temperature is usually maintained at a continuous heat of 20- 25° C, and the humidity is maintained in about 50% to make sure that the presenting effect can be optimized.
five. How long should the finished glued books be delivered intended for use?
Generally, it is shipped immediately at the digital speedy printing shop. Of course, there is absolutely no problem as an ordinary make use of , however it is not possible to read it at the moment since the bonding effect of EVA warm melt adhesive is best following twenty four hours .
6. What are the reasons for a page drop in the user 's use?
On addition to the problems pointed out above, it is generally required to focus on whether the gear debugging is appropriate and if the procedure method is right. Another problem that is very easily overlooked is the fact many plastic hindrances are added at one period during the operation. However, because of the small amount of work performed each time, the EVA warm melt adhesive is repeatedly warmed and melted, which destroys the macromolecular chain structure and decreases heat. Melt viscosity. This scenario is more common in a digital printing shops.
Source: Weinan Printing photos Network
