Easy-to-open lid sheet coating

Abstract

The invention belongs to the technical field of production of an easy-to-open lid and particularly relates to an easy-to-open lid sheet coating. The coating comprises (1) a solvent system comprising ethylene glycol butyl ether, xylene, n-butanol and diethylene glycol butyl ether acetate, (2) a resin component comprising polymer-modified epoxy resin, phenolic resin and high alkyl etherified benzoguanamine resin, and (3) an auxiliary system comprising a defoamer, PE wax, carnauba wax and a leveling agent. The easy-to-open lid sheet coating does not contain BPA. The single-coated surface and thedouble-coated surface have high glossiness and good leveling properties. The easy-to-open lid sheet coating can provide effective protection, has strong adhesion and MEK wiping of 30 rubs, does not fall off after long-term preservation and effectively guarantees the purity and safety of the liquid in the tank.

Description

technical field [0001] The invention belongs to the technical field of easy-open lid production, and in particular relates to a sheet coating for easy-open lids. Background technique [0002] At present, due to the problem of BPA residues in the coating made of epoxy resin, BPA has been proved by research that it may cause various diseases (such as: precocious puberty, heart disease, diabetes, abnormal liver function), and many domestic and foreign regulations have been issued to ban BPA. Laws and regulations (such as: on January 4, 2013, the Swedish Code of Statutes (SFS) published the regulation SFS2012:991, prohibiting children under 3 years old from containing BPA in food packaging coatings and coatings; Nevada, USA passed the ban BPA laws and regulations Bill No.354, the regulations stipulate: Since January 1, 2014, no one shall manufacture, sell or distribute any bottle or cup with bisphenol A intentionally added in Nevada, if the bottle or cup is designed to hold liqu...

AI Technical Summary

Problems solved by technology

[0003] With more and more types of domestic beverages, the requirements for the tolerance of the tank body are getting higher and higher, such as coconut milk and other protein beverages require coatings to have a certain sulfur resistance, such as acidic beverages such as apple cider vinegar, which is the first choice for the coating on the inner wall of the tank There are higher requirements for high-temperature acid boiling resistance, and soda drinks such as cola are filled with a large amount of CO 2 The acidity is very high, and the BPA-Free packaging container in the prior art needs to be improved in terms of acid resistance, compactness and adhesion of the coating

In addition, although water-based coatings have the natural advantages of environmental protection and price, they have been widely used in the inner coating of aluminum product food packaging cans. It is more difficult to realize than solvent (organic solvent) type coatings. At present, most of the existing water-based internal sprays are epoxy acrylic coatings, which have the problem of BPA residue. Low, unsatisfactory color rendering, can not effectively protect the coating

Images