In the production of dry type composite film matters should be paid attention to

A, dry compound define the liquid adhesive coating on a layer of thin film ( The first base material) After oven in the adhesive solvent evaporation, into solid & other; Dry & throughout; The state of the, again with another layer of film ( The second base material) By the hot pressing fit into composite membrane process. The second three, dry, dry compound process in the production of composite membrane 1 should be paid attention to. Pay more attention to the gluing quantity in the current dry composite machine composite glue system there are two different methods of glue: the first kind of glue method for inversion of roll coating, the method commonly used in domestic small low medium dry compound machine, glue amount control depending on the pressure control roller pressure control and regulation of liquid rubber solubility. When boot faster, easier to produce and glue, plastic flow phenomena and uneven coating. Another for anilox roll gluing glue method, the current in the vast majority in the high-speed dry compound machine anilox roll coating, the gluing quantity control on adhesive solution solubility adjustment and the choice of roller, roller pressure regulation, control of blade Angle adjustment. The production of high efficiency, uniform coating, composite products quality is better. 2. Pay more attention to the choice of network cable roller in the middle of the dry type composite film production, and glue roller generally need three sets of anilox roll, 70 - - On the 80 lines for the production of high amount of cooking packaging products; 100 line - - 120 line for water resistance to medium products such as packaging; 140 - - 160 is less used in the production of gluing of lightweight packaging products. Among anilox roll gluing system, scraper to regularly check, keep straight blade, check the rest with the anilox roll Angle. Generally 3 to squeegee pressure 5公斤( According to the actual situation to adjust up and down) The left and right sides, scraper and the applicator roll tangent is 60 & deg; Or so, when installing blade edge linking piece 5 mm, edge direction facing up. Net roller clean up, in addition, the pressure on both sides of the glue rubber roller wants even, whether have damage, rubber roller surface defects, hardness and softness are homogenous check often. All rubber roller must smooth level off, do not touch dirt, it relates to the composite film flatness and uniformity of glue. 3. Pay attention to the environmental impact of the dust in the air will adhere to in the film, affect the stick relay, especially send FengKouChu oven, strong air flow with dust particles and will to the film. So shall ensure that the environment clean and keep sending FengKouChu mesh often clean. Implement static elimination and keep the machine for film environmental health, adhesives solvent completely sealed to save and filter in use. In addition, to prevent dust adhesion in composite thin film on the surface, need cleaning anilox roll and film, composite roller cleaning, pay attention to sanitation. Working environment temperature is also very important, the appropriate temperature 21 - - - 25 degrees, humidity is 65%, adhesive and base material easy to moisture absorption humidity is too big, the quality accident. 4. Pay attention to the temperature curing time and curing time is not enough, residual solvents, will produce bubbles, take off a layer or bag of Angle of curl. Curing temperature too high can cause dry composite membrane curled up. Required by the different types of adhesives its curing time is not the same, such as aliphatic IPDI ( Isophorone diisocyanate) Manufacture of curing agent, with aromatic TDI ( Four benzene diisocyanate) Manufacture of curing agent, as a result of IPDI with hydroxyl ( - 哦) Response ability is weak, so you must use the catalyst ( In the production of glue) And increase curing time. The other low curing temperature will also cause inadequate curing.