Dry after what problem will appear, and how to solve these problems?

Dry type composite under the conditions of dry binder refers to a method of composite, in the composite, a series of quality problems may occur, this paper listed for your part may appear the quality problem and collocation of the corresponding solutions for your reference. The tunnel effect 1, improper reasons (1) tension control. (2) at the beginning of the adhesive adhesion force is too low and coating amount is incorrect. When too much adhesive coating, adhesive interlayer sliding will happen. (3) the bubble is assembled by adhesive to be absorbed by the ink surface or rejected, make enough adhesive coated on the surface of the ink to form bubbles. 2, the solution (1) adjust the tension of each part, make two kinds of base material expansion. (2) to determine the appropriate coating weight, control the composite initial adhesion force. (3) should choose good wettability ink or adhesives, appropriate increase the coating weight. Composite spots composite spots is also called the white point 1, the reason (1) the printing with the aluminum foil, aluminum plating film composite film, aluminum plating film, aluminum foil surface finish, high ability to reflect light, when the ink covering power is not enough or thin, ink layer thinner, printing ink concentration reflected light through the ink will encounter aluminum layer. Appears in light colors such as white, yellow. (2) with direct printing film composite polyethylene milky white backing film surface roughness can also cause the composite spots. 2, choice of solution (1) high covering power of ink or ink and ink layer. (2) the increasing amount of adhesive coating, check the roller. (3) change the base material film. Scratch causes 1, (1) because scraper after use clean, no residual adhesive curing, again use the scraper, the formation of scratches. (2) in the coating process due to foreign bodies blocked parts in scraper or scraper mechanical damage and scratches. (3) dry compound machine guide roller stick glue hardening after can be directly cut film, especially the guide roll within the drying oven and composite roller can't synchronous operation, the foreign body on the guide roller is easier to cut thin film. 2, the solution (1) clean or replace the scraper. (2) cleaning wipe the guide roll. Smoothness bad smoothness bad refers to the product in the production of composite compound after packaging and automatic packaging machine perform poorly, or difficult to make bag opening 1, reason (1) the curing temperature on the high side, smooth agent at high temperature. (2) adhesive seeps to the inner surface, influence coefficient of mo was found on the surface of the substrate membrane, especially in the film is thinner, corona treatment are more likely to happen. (3) smooth sex bad base material itself. 2, solution (1) strictly control the curing conditions. (2) check the adhesive types or grades. (3) change the base material.