Shout plastic flexible packaging solvent residual amount exceeds bid everyday, what should I do?

【 Introduction 】 Plastic flexible packaging solvent residue problem has always been a difficulty in ink enterprise, countries have in BOPP/PE composite packaging hygiene requirements, request benzene solvent residues of below must achieve 3 ㎎ / ㎡. With the constant improvement of the people for food hygiene requirements, how to reduce the solvent residue in the food packaging and printing pattern brush, ink has become the enterprise key concern. 【 Text: Plastic soft bag factory in practice, can from the following several aspects to reduce solvent residue in the food packaging printing machine brush: one, in the EVA - 40 w, MP - 45 and CL - PP three kinds of resin, are often the CL - The solvent residual amount of PP with highest, EVA - Solvent residue from at least 40 w, so we can ensure the strength of the composite conditions, can decrease the CL - The content of PP, increase the EVA - The content of 40 w; Second, choose suitable CL - PP。 Different manufacturer of CL - PP caused in a composite ink solvent residues difference is very big, if the formula cost can accept, can choose Japan PP803MWS paper production, under the condition of the same amount, can generally be down to 50%; Three, dissolved in EVA - 40 w, MP - 45 and CL - PP, add the part of the ethyl ester and residual solvents reducing agent, can effectively reduce the toluene solvent residues in the printing ink film; Four, check used in printing ink solvents and printing pattern brush by using solvent is pure, if there is a small amount of high boiling point solvents, can also cause high solvent residue, and even lead to print there are serious odor; Five, the adjusted in the process of printing and composite: 1, use less as far as possible when dispensing dilution solvent toluene solvent, can choose toluene, acetic acid, butyl ketone = 2, 5, 3 mixed solvent; 2, in the process of printing to improve printing machine drying tunnel ventilation, appropriately raise the temperature of drying tunnel, if conditions permit after can be in white ink printing, open the bake, multiple dry; 3, in the process of printing can be appropriate to reduce the viscosity of the ink.
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