Crease-resistant storage and fresh-keeping method for passion fruits

Abstract

The invention discloses a crease-resistant storage and fresh-keeping method for passion fruits which comprises the following steps: wrapping a layer of plastic packaging film outside the passion fruits, manufacturing the packaging film into an upper film and a lower film in advance, connecting one side of the upper film with one side of the lower film, forming large grooves for embedding the passion fruits and small grooves for vacuumizing in the upper film and the lower film in advance through mold pressing of a mold, placing the passion fruits in the large grooves of the lower film, then buckling the upper film on the lower film, performing heat sealing bonding on the large grooves of the upper film and the lower film after buckling through a heat sealing machine, reserving a small groove part not subjected to heat sealing bonding at the heat-sealing bonding part, aligning a vacuumizing pipe with the small grooves after heat sealing bonding, pumping out air in the large grooves containing the passion fruits through vacuumizing equipment, then using the vacuumized packaging film to perform secondary heat sealing on the small groove part through the heat sealing machine, and boxing and warehousing the passion fruits wrapped in the vacuum packaging film after secondary heat sealing or delivering and transporting the passion fruits out. According to the method, the passion fruits are wrapped with a vacuum packaging film.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping and storage of fruits and vegetables, in particular to a method for anti-wrinkle storage and fresh-keeping of passion fruit. Background technique [0002] Passion fruit is widely distributed in tropical and subtropical regions. In my country, Guangxi has the fastest development and has become a resource advantage in Guangxi. Passion fruit has a unique flavor, high nutritional value and various medicinal values. It is widely used in folks to treat asthma, bronchitis, urinary tract infection and diabetes. At present, passion fruit is mainly used for fresh food or processed into fruit juice. Certain market potential. Passion fruit is a typical respiratory climacteric fruit, with strong respiration, severe water loss, quick ethylene response, rapid changes in physical and chemical properties after harvest, prone to weight loss, shrinkage and rot, which reduces the commodity value and causes lar...

AI Technical Summary

Problems solved by technology

Passion fruit is a typical respiratory climacteric fruit, with strong respiration, severe water loss, fast ethylene response, rapid changes in physical and chemical properties after harvest, prone to weightlessness, shrinkage and rot, which reduces the value of commodities and causes large economic losses.

[0003] At present, the preservation methods of passion fruit mainly include low temperature preservation, modified atmosphere packaging preservation and film preservation, etc. Low temperature preservation can effectively inhibit the growth of microorganisms, reduce the respiration intensity of the fruit and the release of ethylene, and the preservation effect is good, but the cost is high, and it needs to be realized for a longer period of time. The storage of time needs to be assisted by other methods to achieve; controlled atmosphere preservation is based on the principle of fruit respiration and inhibition, aiming at the characteristics that the fruit respiration process is inhibited by carbon dioxide and oxygen content, by adjusting the content of each gas in the microenvironment to control the respiration, and then achieve The purpose of fresh-keeping, but it requires high equipment and high cost; film-coating is to coat a layer of liquid film on the surface of the fruit, which becomes a very uniform film after drying, so as to isolate the fruit from the air for gas exchange and inhibit the respiration of the fruit Function, good effect, low cost, is a more practical fresh-keeping method

Chitosan has film-forming, moisturizing, adhesive and antibacterial properties, and is safe and non-toxic. It is a commonly used film coating agent in fruit and vegetable preservation. Afterwards, the mechanical properties and stability are poor, the anti-oxidation ability is weak, the air-conditioning and antibacterial ability are reduced, the fresh-keeping time is short, and the viscosity is large, which is not suitable for mechanical operation and needs further improvement.

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