Seven other formula, decade of solvent-free composite soft package return to recommend!

Adhesive, and ink, matching tests to bear in mind; In winter, the temperature is low, don't forget to warm up mixed gel; A, B glue, mix proportioning, want to wait for stable temperature measurement; Plastic barrels, humidity value, too big too small is bad; Measuring clearance to accurate, steel roller temperature should be reasonable; Winding temperature control, put an end to the roll core stick edge; The above points down in the heart, solvent-free composite can do a good job! A, adhesive, and ink, matching tests to bear in mind before formal production, deal with containing pigment composition of ink ( Such as transparent yellow, pink and other colors of ink) For targeted and solventless adhesives compatibility test. As we know, the molecular weight of solventless adhesives is small, its surface with a strong penetration, miscibility of ink capacity in low molecular weight ripening stage, the general will determine whether ink and miscibility occur solventless adhesives, need to be solvent-free composite product curing again after 4 hours. In addition, we also can simulate the real process of composite to determine ink will appear with solventless adhesives miscibility phenomenon, the specific method is: the A/B mix glue, printing film with film (light Or aluminum plating film) Compaction, then laminating film together into the oven curing period of time, observe whether printing graphic edge phenomenon is not clear, if not clear, indicates the immiscible phenomenon. 2, in winter, at room temperature is low, don't forget to warm up mixed glue in winter under the condition of room temperature is lower, should mix A/B glue into the curing chamber preheating, preheat temperature 45 ℃ or so commonly, this mix A/B glue into the plastic bucket, won't because of the temperature difference is too large to mixed plastic barrels of the A/B glue temperature fluctuations. However, A/B mixed glue cannot be placed in the curing room for A long time, otherwise it may cause the defoaming agent content of failure. 3, A, B glue, mix proportioning, to wait for stable temperature measurement of metering pump with A volume metering adhesives mix ratio, when the temperature changes, the glue liquid density changes, due to part A and part B two kinds of different density of adhesives, therefore both the proportion of density changing with temperature is different also, this will result in low temperature when measured A, B glue mixing proportion and temperature rise to normal temperature measured A, B glue mixing ratio has A certain discrepancy. So before each work shift boot, should be rubber mixing machine temperature stability measurement again after A, B glue mix proportioning. Four, plastic barrels, humidity value, bad too big too small A glue - is the main ingredient NCO, the crosslinking reaction with moisture in the air, in general, if A plastic barrels adhesive surface crusting phenomena, indicates A rubber surface crosslinking reaction has occurred. And, when air humidity is bigger, plastic barrels of water content in the air will be higher, so it is necessary to adopt dry desiccant air filter of plastic bucket. If desiccant moisture change color, it shows that the moisture absorption efficiency, to cope with its dry before using again. Some of the flexible packaging enterprises adopt the method of filling the N2 in A plastic bucket to rule out the air in the plastic bucket, effect is better also. Five more accurate measurement, metering space will change under different temperature measuring roller, this will lead to measurement, and the temperature difference, the greater the measurement deviation, the greater the gap even damage measuring roller surface. Six, steel roll temperature properly measuring roller temperature and coated steel roller temperature is controlled, can according to the viscosity - temperature property of the adhesive were set up, general coated steel roller temperature is high roller temperature 5 ℃, and it can further reduce the viscosity of adhesive, improve the flow of adhesive property, so as to get a better composite appearance. In addition, but also compensate for coating and substrate temperature is lower and the heat away from the roll surface, to keep the actual temperature on the surface of the coated steel roller. Seven, winding temperature control good composite membrane are required to keep the surface must be remaining after winding, to maintain the consistency of the internal and external curing effect. Because of the large solvent-free composite products winding diameter, curing temperature ( 35～40℃） Was lower than those of dry compound, therefore only by external heat transfer cannot guarantee curing effect of central composite film roll. Factors influencing the winding temperature on the surface of the composite film roll and the control methods: (1) the environment temperature, solvent-free composite operating environment should be constant temperature and humidity; (2) the film roll temperature, due to the low winter room temperature, film coil temperature is lower, especially those who just take out from warehouse in the workshop of the base material film is often a cold, at this point the best first film roll on workshop back to the warm, to improve its temperature, and then use; (3) substrate preheating temperature, room temperature is lower in winter conditions, solvent-free composite equipment should be adopted for the second roll preheat roll device of substrate preheating, in order to avoid composite film roll on the surface of the winding temperature is too low; (4) composite temperature will directly affect the winding temperature of the composite film roll surface, should pay attention to adjust its operations, in addition, for the antistatic PE material, because of the antistatic agent is sticky phenomenon, so in the actual production still need to set the temperature of the composite roller was lower.