Making the solvent residual amount of food packaging standard, the complete!

The standards of the state is continuing to improve, national standards of the state in 2008: GB/T 10004 - 2008 'packing plastic composite film, bag, dry compound extrusion compound,' and started on August 1, 2009, has been implemented for five years. National pledges inspect bureau to the flexible packaging industry, food sack sampling and publication of results. From the results still have a lot of enterprises are not qualified. One, from printed material on the plastic film to control the film itself has a certain influence. Such as toluene and other solvents on BOPP polyolefin film has good affinity, printed on thin film, especially on the ink area is large, thick ink printing, solvent residue is difficult to volatilize, some large-scale printing factory although has advanced equipment, is often difficult to control of solvent residues in food packaging. Therefore, when choosing film should be carefully check, manufacturers provide certification and quality standards. Try to use one of the big manufacturers, quality stability is better, because they don't use outdated film. Second, from printed material solvents on control remains one of the biggest reason is that the influence of solvent properties. Choose no benzene solvents. No benzene solvents for the kinds of esters, alcohols, solvents, alcohol, water, etc. All kinds of the standard, the content of the solvent is different, quality is different, its moisture content, boiling point, high and low, volatile speed can cause solvent residue. In the process of printing with or without butyl ester as little as possible. There is a no benzene solvents, reducing agent, the residual solvent colorless transparent liquid ignition point 205 to 250 ℃ 95 ℃, boiling point, density 0. 7, insoluble in water. If printing ink solvent, high moisture content or high boiling point solvents can cause the loss of ink drying speed, high solvent residue. Print quality and solvent quality has a lot to do, but many printing factories are not very attention to the quality of the solvent testing, so that the residual problem. Enterprises with the lab equipment in accordance with the relevant provisions, it has the detection. To have to learn to do swarms detection for reach national standard. Third, from printed material control should choose no benzene ink printing ink. No benzene ink can be divided into: no no ketone benzene series, no benzene ketone series, the series of fat-soluble, alcohol soluble series, the series of alcohol water soluble and water soluble series, etc. Table printing, the printing ink. As far as possible choose have the stability of the product license good products, maintain the stability of the swarms products. What kind of material must be seal film should choose what kind of ink, must not use. But there are many companies buy is no benzene, ketone, ink and in printing process using partial butanone, this also will be affected by certain influence. Try to communicate with customers, reduce the printing area, reduce the printing ink layer. Four, controls should be controlled from the composite adhesive polyurethane adhesive for toluene diamine, residual toluene diamine in polyurethane adhesive, polyurethane ink aromatic isocyanate and water chemistry. Free monomers in polyurethane adhesive, pu ink, aromatic amine has been identified has the very high toxicity of cancer. Our country GB9683 the composite food packaging hygiene standards, regulations, after heating extraction treatment, packaging bags of aromatic amine ( Including free monomer and cracking of debris to toluene diamine) Content shall not be greater than zero. 004mg/L。 At present, there are many companies producing water-based adhesives, alcohol soluble adhesive, etc. Therefore, when using thinner, must reach the national standard. Five, from printing presses, composite machine to control the equipment is advanced, had better use better printing machine printing. Such as printing speed, thinners used type is quick drying, drying performance is good, with good cooling roller, odor emission, etc. , can make the ink solvent volatilization of thoroughly. Press the oven temperature adjustment, according to the substrates. In general, BOPP, PE, CPP oven temperature around 45 degrees; PET, NY at about 50 degrees. Oven high temperature without the release of benzene ink on a more serious impact, because of the high temperature will make no benzene ink connection material and solvent volatilization quickly causing false dry phenomenon, therefore, should increase the amount of cold air, prevent solvent residue. Of compound process requirement: composite machine, compound machine speed determination and control, the selection of network cable roller, glue viscosity control, control the amount of glue, glue coating evenly; Increase the ventilation rate eliminate odor. Control the temperature of oven paragraphs, general is 70 degrees, 80 degrees, 90 degrees; Good control of hot blast temperature, general control at about 55 degrees. Six, and from curing, bag making control on curing requirement: should choose better barrier property lining. Such as CPP, co-extrusion PE, etc. Should choose a two-component composite binder can be further solidify, solidify time must not be less than 24 hours. Curing chamber must have air inlet, in fresh air; Leave a vent, eduction in the curing room smells. Should further down a volume before bag, can't just out of the bag curing room. After cooling to room temperature cured good coil should be fully, bag work again. Seven, from the sound system of quality management of each link to control all the materials into the factory to test and make records, unqualified cannot be used. In the production process and improve the management system, each process every a process should be insisted on detection. After printing film detection, and curing. Bag before testing, found immediately find out the reason why high solvent residue and handle, otherwise the bag will not qualified. A sound system of solvent residue detection. To do personnel, professional. Eight, from the aspects of the environment and other factors to control the environment including workshop environment, production environment, temperature, humidity, etc.
is a must have for anyone who appreciates aluminum foil paper manufacturers to the greatest extent.
Deliver value to our customers by providing the most reliable and efficient products as 123.
Being focused on the goals of 123, our team, and most importantly, ourselves is critical to long-term success.
Using high technology, 123 showed its competitive advantages, captioned with information about the company's commitment to providing safe, reliable, profitable jobs to local artisans.
Kolysen Packaging Integration Co.,LTD. always focus on the situation of global market and understands the importance factors of manufacturing 123.