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    Home > Coatings News > Paints and Coatings Market > Coating standard: the latest regulation of coating for inner wall of export food packaging barrel in China

    Coating standard: the latest regulation of coating for inner wall of export food packaging barrel in China

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: with the expansion of the definition of food safety, the packaging requirements of food and agricultural products in various countries are constantly improving In the international market, many food and agricultural products are packaged in steel drums, and the hygienic requirements of the inner wall coating have attracted wide attention of all countries As early as the 1950s, the FDA of the United States required to attach great importance to the detection of food and agricultural packaging barrels In order to meet the needs of the international market, China has also made specific provisions on the hygienic requirements of the inner wall coating for the packaging barrels of exported food and agricultural products At present, the steel buckets for inner coating and packaging of food and agricultural products in China are generally honey buckets, juice buckets and tomato sauce buckets If Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder 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United States required to attach great importance to the detection of food and agricultural packaging barrels In order to meet the needs of the international market, China has also made specific provisions on the hygienic requirements of the inner wall coating for the packaging barrels of exported food and agricultural products At present, the steel buckets for inner coating and packaging of food and agricultural products in China are generally honey buckets, juice buckets and tomato sauce buckets If the inner coating packaging barrel is used to contain these foods, its inner wall sanitation quality can not meet the safety food hygiene requirements, it will cause secondary pollution to the food, thus affecting the internal quality of the products According to the regulations, the food grade coatings allowed to be used on the inner wall of the steel drum of the packaging barrel include polyamide coating, peroxyethylene coating, organic fluorine coating, etc Polyamide epoxy coating belongs to epoxy coating, and epoxy coating belongs to curing film coating Epoxy resin is generally made by polymerization of bisphenol A (diphenylpropane) and epichlorohydrin According to the degree of polymerization, the molecular weight of epoxy resin is also different From the perspective of health, the larger the molecular weight (i.e the smaller the epoxy value), the more stable it is, the less likely it is for harmful substances to dissolve and migrate into food, so the higher its safety Polyamide, as the curing agent of polyamide epoxy resin coating, is a kind of high polymer compound, and no toxic report has been found The quality (epoxy value) of polyamide epoxy resin is closely related to the ratio of curing agent and curing degree When the ratio of curing agent is appropriate and the curing degree is higher, the less uncured substances are transferred to food in epoxy coating According to gb9686-88 hygienic standard for polyamide epoxy coating on the inner wall of food containers, the evaporation residue of polyamide epoxy coating in various solvents shall be controlled below 30mg / L Perchloroethylene paint is made of perchloroethylene resin and plasticizer, which can be naturally dried into film after being brushed or sprayed on the inner wall of the packaging barrel Perchloroethylene coating is generally divided into primer and finish Perchloroethylene resin contains vinyl chloride monomer, which is a carcinogenic toxic compound The perchloroethylene coating after film forming may still contain the residual of vinyl chloride According to gb7105-86 hygienic standard for perchloroethylene inner wall coating of food containers, the residual of vinyl chloride monomer in the perchloroethylene coating after film forming shall be controlled below 1 mg / kg Plasticizer, solvent and other additives used in perchloroethylene coating must comply with the relevant provisions of gb9685-94 hygienic standard for the use of additives for food containers and packaging barrels, and toxic or highly toxic additives (coating online) are not allowed The coating shall be uniform without bubbles, spots, wrinkles and falling off Organic fluorine coatings include polyfluoroethylene, polytetrafluoroethylene and polyhexafluoropropylene coatings These coatings are polymerized with fluorine ethylene, tetrafluoroethylene and hexafluoropropylene as main raw materials, and are sprayed on the inner wall surface of the packaging barrel with certain additives The organic fluorine coating has the characteristics of anti sticking and anti-corrosion, but its acid resistance is poor, so it is widely used in the inner coating packaging barrel of honey In terms of application, the organic fluorine coating on the inner honey packing barrel is polytetrafluoroethylene, which is called PVF coating for short It is a kind of high molecular compound with stable chemical properties, and generally there is no monomer residue It is a relatively safe coating for the inner wall of food packaging barrel However, when cleaning the inner wall of the steel drum, most of the current packaging drum manufacturers use spray cleaning and drying line for cleaning The cleaning agent is usually chromate, which may cause the residual chromate on the surface of the container, and then mixed into the internal coating Therefore, in the production of honey coated steel drum, it should be inspected in accordance with gb1167-89 hygienic standard for polytetrafluoroethylene coating on the inner wall of food containers The standard stipulates that the appropriate amount of chromium and fluorine shall be controlled between 0.01 mg / L and 0.2 mg / L respectively In addition, when polytetrafluoroethylene is baked, if the temperature reaches 280 ℃, it will fission and produce toxic fluoride with strong volatility Therefore, when using the steel drum with polytetrafluoroethylene internally coated with honey, the baking temperature shall not exceed 250 ℃ In recent years, the fruit juice, tomato sauce and honey exported by our country are often returned from abroad due to the excessive pesticide content As a food packaging barrel, the lower the residual solvent content of the inner wall coating, the better Therefore, in the production of food inner coating packaging barrels, we must follow the food safety and health requirements to ensure that the cleaning of food packaging barrels and the content of residual harmful substances do not exceed the requirements of health standards For this reason, a closely linked supervision system should be established The enterprises using food packaging barrels should ask the packaging barrel manufacturers for the food safety and health inspection report of the packaging barrels; the packaging barrel manufacturers should ask the coating suppliers for the food safety and health inspection report of the inner wall coating At the same time, the relevant departments shall regularly supervise and inspect the food packaging barrels and issue inspection reports Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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