Resistant to cooking bags should be paid attention to in production

In the summer, use high temperature resistant compound ink printing NY film or PET, anti sticking phenomenon may arise, especially the south of the high humidity. Due to NY membrane hygroscopicity strong, when the relative humidity of 80% or more, it's easy to have a quality failure, the need to control the workshop environment, otherwise it is not suitable for production of highly resistant to cooking bags. Resistant to cooking bags anti sticking two larger impact factors, one is the ink adhesion fastness of base material itself. Urethane ink overall adhesion fastness to NY membrane as the printing ink adhesion fastness of PET, and chlorine c class printing ink adhesion fastness of BOPP film. When it cannot meet the good printing workshop environment, NY film hygroscopic, contraction after winding. So in the summer when printing NY membrane, membrane volume shoulds not be too great diameter ( 3000 m) 。 Failing to compound, wrapped with aluminum foil upright moistureproof implantation. Second, solvent residue in the printing design. Anti sticking caused by excessive solvent residual tend to appear in the low speed on the printing machine. For itself drying ability is not strong, printing ink viscosity on the high side, large amount of inking, print design & other Table dry & throughout; Phenomenon is more serious. Especially the article edges overlapping part of the packaging design, film roll is put in bigger difference also easy to cause the firmness of the phenomenon. Pu ink as ink layer & other; Table dry & throughout; Caused ink anti sticking phenomenon, require ink printing under low viscosity. In the condition of low viscosity, eat less ink, printing ink layer thinner, under a lot of dilution solvent, pu ink connection material molecules is relatively loose, shielding ability of solvent evaporation. When the ink transferred to the film, the solvent in the bake, can quickly and thoroughly from the ink layer, also easy to produce & other; Table dry & throughout; Phenomenon. In the production of cooking bags, resistant likely not easy to prevent & other; Bleeding & throughout; Phenomenon, resulting in large economic losses. Because the problem often appeared in the late processing, even have a package contents. The author exposed a lot of this type of permeable accident of color, and through a lot of contrast test, found that nylon membrane performance and characteristics of the ink itself has a serious effect on color penetration. 1. Color penetration is often happened in the packing bag of nylon membrane as the outer layer material. When change the outer membrane for pet or BOPP film, Other things being equal) Penetration, the color will not happen. 2. Penetration hue with red, purple is, therefore, we chose different class red purple pigment. When nylon membrane defects, color penetration phenomenon cannot be completely ruled out, can only see penetration degree of distinction. 3. Temperature and water are the two basic elements of color penetration phenomenon. The packing bag of the same temperature conditions, the same in the oven is little appear penetration; Below 70 ℃, the normal time of sterilization also won't appear color penetration phenomenon. Cooking bags production due to the resistance to the relatively high technology and high added value, need to establish a set of relatively complete according to the inspection procedures of raw materials, and production experience, linked together, can guarantee the final product is qualified. （ YuYongYue)