A composite fruit and vegetable fresh-keeping paper and its preparation method and application method

Abstract

The invention discloses composite fruit and vegetable preservative paper. The composite fruit and vegetable preservative paper is a closed paper sheet formed in the manner that a non-woven fabric coated with preservative powder a and a non-woven fabric coated with preservative powder b are arranged in a ventilation film bag to be subjected to heat sealing. The invention further discloses a preparing method for the composite fruit and vegetable preservative paper. The preparing method comprises the steps that the preservative powder a and the preservative powder b are prepared; viscose and the preservative powder a are stirred evenly to manufacture a viscose and powder mixed preservative agent a, the non-woven fabric is coated with the viscose and powder mixed preservative agent a, and drying is conducted; viscose and the preservative powder b are stirred evenly to manufacture a viscose and powder mixed preservative agent b, the non-woven fabric is coated with the viscose and powder mixed preservative agent b, and drying is conducted; and the non-woven fabric coated with the preservative powder a and the non-woven fabric coated with the preservative powder b are flatly laid in the ventilation film bag, and the closed paper sheet is formed through heat sealing. The fruit and vegetable preservative paper can continuously and effectively adsorb ethylene, carbon dioxide and other harmful gas generated in the fruit and vegetable storage and transportation process, fruit and vegetable moisture condensation is controlled, bacterium killing and restraining are achieved, bacterium breeding is reduced, after ripening of fruits and vegetables is restrained, the freshness keeping function is achieved, and the composite fruit and vegetable preservative paper can be applied to freshness keeping of the fruits and vegetables.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping of fruits and vegetables, and in particular relates to a composite type of fresh-keeping paper for fruits and vegetables. Background technique [0002] At present, the fresh-keeping methods of fruits and vegetables mainly include low-temperature storage, controlled-atmosphere storage, soaking in chemical agents or biological agents, adding preservatives in small solid packages, and using moisture-proof paper. Both low-temperature storage and controlled-atmosphere storage require certain temperature-controlling-humidity-controlling and gas-generating equipment, which are expensive, relatively high in cost, and inconvenient for fresh-keeping of fruits and vegetables during transportation; chemical or biological agent fresh-keeping methods are not good at controlling drug residues; Solid preservatives have a limited area of ​​action and are suitable for preservation of high-quality fruits and v...

AI Technical Summary

Problems solved by technology

Both low-temperature storage and controlled-atmosphere storage require certain temperature-controlling-humidity-controlling and gas-generating equipment, which are expensive, relatively high in cost, and inconvenient for fresh-keeping of fruits and vegetables during transportation; chemical or biological agent fresh-keeping methods are not good at controlling drug residues; Solid preservatives have a limited area of ​​action and are suitable for preservation of high-quality fruits and vegetables in small bags or boxes. If they are used in large-packages such as foam boxes and cartons, they cannot completely absorb harmful gases and the preservation effect is not obvious; moisture-proof paper preservation can only remove them. Condensation on fruits and vegetables but unable to suppress or remove harmful gas damage to fruits and vegetables

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