Nano Level Oil Resistant Coating For French Fry Box: Resistant To Leakage, Long-lasting Dryness
In the fast food industry, paper packaging such as french fry boxes often have oil stains on the outer layer due to oil penetration, which not only affects consumer experience but may also pose food safety hazards due to packaging damage. The emergence of nanoscale anti oil penetration coating technology provides innovative solutions to this problem.
Traditional paper packaging has a loose fiber structure, and oil molecules can easily penetrate into the material through capillary action. For example, untreated corrugated paper shows obvious signs of penetration after 12 hours of contact with engine oil, while French fry boxes have a faster rate of oil penetration when storing high-temperature French fries, leading to packaging softening and oil leakage. Nano coatings alter the surface energy of materials to construct a microscopic oleophobic structure, allowing oils and fats to form spherical droplets when in contact with the surface, preventing them from infiltrating the fiber gaps. Experiments have shown that paper coated with nano coatings can still maintain intact oil droplets when in contact with 180 ℃ hot oil, without any penetration phenomenon, and the oil prevention effect is significantly better than traditional fluorinated hydrophobic agents.
The core technology of this coating lies in the application of nanoscale silica. Silicon dioxide, as the main component of glass and ceramics, has chemical inertness. After nanoscale treatment, the particle size reaches 20-50 nanometers, which can uniformly fill the gaps of paper fibers and form a dense protective layer. Compared with fluorinated coatings, nano silica coatings are non-toxic and harmless, meet the safety standards for food contact materials, and have excellent high temperature resistance. They can withstand temperatures above 200 ℃ without decomposition. In addition, the coating also endows the packaging with characteristics such as acid and alkali resistance, UV resistance, etc., extending its service life.
From the perspective of application scenarios, nano coatings have been widely used in fast food packaging such as hamburger paper, french fry boxes, and beverage cups. Taking KFC as an example, some of its stores use nano coated packaging paper, which always keeps the outer layer dry when serving high-fat foods such as fried chicken, and consumers do not feel greasy when holding it. For food delivery scenarios, coatings can also prevent condensation water from penetrating and prevent packaging softening. In terms of technical implementation, the coating process is simple. Simply spray the nano solution onto the surface of the paper, and after natural drying, an invisible protective layer can be formed without changing the original texture and transparency of the packaging.
The nanoscale oil resistant coating has achieved a transformation of paper packaging from "passive oil absorption" to "active oil rejection" through microstructural innovation, providing a safe, environmentally friendly, and efficient packaging solution for the fast food industry.
Zhejiang Dongou Printing Industry Co.,Ltd, the expert in French fried box production
