Dry type composite film bubble, poor strength, peculiar smell problems and corresponding solutions

Dry type composite under the conditions of dry binder refers to a method of composite, in the composite, dry type composite membrane can appear a series of quality problems, this paper listed for your part may appear the quality problem and collocation of the corresponding solutions for your reference. Bubbles appear bubbles composite products is because of not fully fit between composite layer, as well as the causes and solutions of 3 big cause of 1, 1) roller use time is too long or use improper maintenance, local corrosion or damage, can make the rubber roller surface composite film after composite roller, the corrosion or injury was not affected by the stress of roller, formation of bubbles. (2) solvent containing active hydrogen content is higher, reaction of co2, the formation of bubbles. (3) coating weight is lower than a certain limit, dry type composite membrane is easy to form bubbles. 2, the solution (1) change of roller or repair. (2) control of solvent purity. (3) to clean the applicator roll or replace the applicator roll. Bad composite strength poor composite strength refers to divest the strength of the composite membrane is lower, and the causes and solutions of eight cause of 1, 1) adhesive and coating weight ratio or incorrect measurement is wrong. (2) the melting agent containing alcohol, water or moisture absorption substrate water cut is more, the main agent is not completely. (3) coating is enough. (4) improper curing conditions. (5) drying and complex conditions ( Composite pressure, composite temperature) Improper. 6 composite substrate surface tension is low. All landowners composite matrix additives ( Smooth agent, antistatic agent) Precipitation. Today plasticizing bad base material surface or base material surface contamination. 2, the solution (1) to choose adhesive and coating weight, accurate configuration. (2) control of solvent water, alcohol content. (3) improve the coating weight ( Or replace, clean applicator roll) 。 (4) check the coating dandy roll is working correctly. 5. Replace the binder. Adhesive should be matched with the, strictly control the use of residual adhesive. 6 composite substrate surface processing. All landowners control curing temperature and time, inhibition of smooth agent precipitation. The base was replaced. Product smell smell the causes and solutions of three 1, causes (1) printing ink itself has a problem, or too high residual solvents. (2) thin film manufacturers in the production of base material when joined some odorous additives, after dry compound fertilizer exfiltration and cause bad breath. (3) the peculiar smell of the film itself, The oxidation of PE stink smell, EVA itself, etc. ) 。 2, solution (1) to replace printing ink, strictly control the quality of printing. (2) adjust the temperature of the drying oven, the air volume, exhaust air volume, and speed. (3) change the base material.