This invention discloses a film-forming agent for preventing
cracking in nectarines and its preparation method. The film-forming agent, by weight, comprises the following components: 4.0-7.0 parts film-forming matrix, 0.2-0.5 parts
calcium-based nanoparticles, 0.2-0.5 parts
calcium source, 0.6-1.0 parts
antibacterial agent, 0.4-0.7 parts
insect repellent, 0.2-0.4 parts crosslinking agent, 0.9-1.3 parts
plasticizer, 0.9-1.3 parts quality-improving and color-enhancing additive, 0.3-0.5 parts process aid, 0.1-0.3 parts pH adjuster, and 86.0-91.0 parts deionized water. The film-forming agent integrates multiple functions such as preventing
cracking,
sun protection, antibacterial properties,
insect repellency, and nutritional
color enhancement. It achieves a crack prevention rate ≥96%, a
sunburn incidence rate ≤2%, and significantly improves color uniformity. The film formed by the film-forming agent has high air permeability, high transparency, strong
water resistance and high tensile strength. It can firmly adhere to the smooth
skin of the nectarine and extend as the fruit expands, and is not easy to break.