Low-temperature and quick-dry coating for food can inner wall

Abstract

The invention discloses low-temperature and quick-dry coating for a food can inner wall. The low-temperature and quick-dry coating is prepared from modified vinyl resin, phenolic resin, peach gum, modified starch, fillers, auxiliaries and solvents. Compared with existing coating for the food can inner wall, the coating can greatly improve the storage stability of food in a food can, and the service life of a coating film is long and prolonged by 2.0-2.2 times as compared with that of a common coating film for the food can inner wall. The low-temperature and quick-dry coating has the advantages that a paint layer formed after the food can inner wall is coated with the coating is tough, high in brightness, resistant to acids, stable in performance, less prone to corrosion, free from discoloration and good in adhesive force; the coating film is excellent in obstructing capacity, and food can be more effectively stored; most importantly, the coating is excellent in low-temperature drying property and high in drying speed by the synergistic effects of the components in the formula, a large amount of time is saved, the coating can dissolve out micro-elements beneficial to human bodies, nutrient components of the canned food can be greatly increased, and food flavor can be improved.

Description

technical field [0001] The invention relates to the field of metal packaging coatings, in particular to a coating for the inner wall of a low-temperature quick-drying food can. Background technique [0002] The coating for the inner wall of food cans, the coating used for coating the inner wall of cans, must have the general function that the coating film must be harmless to the human body and will not bring peculiar smell to the food, especially for beverages, condiments, alcohol, etc. Containers are more corrosive, and the requirements for corrosion resistance of food cans are higher. The hygienic quality of paint directly affects food safety. Although the coatings developed in recent years that can be used for the inner layer of cans can meet the needs of some occasions in the market, most of the inner coatings of food cans dry slowly. If you want to speed up the drying speed, you have to increase the drying temperature. The paint is not resistant to high temperature, a...

AI Technical Summary

Problems solved by technology

Although the coatings developed in recent years that can be used for the inner layer of cans can meet the needs of some occasions in the market, most of the inner coatings of food cans dry slowly. If you want to speed up the drying speed, you have to increase the drying temperature. The coating is not resistant to high temperature, and it is prone to peeling off and cracking after long-term drying at high temperature, which forms a contradiction in demand