A modified atmosphere packaging for regulating the ripeness of post-ripening fruits

Abstract

The present invention also discloses a modified atmosphere packaging for adjusting the ripeness of post - ripening fruits, which comprises an outer composite cardboard box, a fruit contact layer, a release layer, and a packaging film; the fruit contact layer is arranged on each inner side surface of the outer composite cardboard box, the release layers are respectively arranged between the left and right side surfaces of the outer composite cardboard box and the fruit contact layer, and the packaging film wraps the outside of the outer composite cardboard box to block the gas between its inside and outside. The present invention utilizes the ethylene - releasing layer on one side in the outer composite cardboard box to slowly release ethylene to promote the ripening of raw fruits, and the 1 - MCP - releasing layer on the other side to slowly release 1 - MCP to form competitive inhibition with the ethylene released by the fruits themselves to slow down the fruit ripening. The middle is blocked by microporous films of different specifications to form a plant hormone concentration gradient, effectively enabling the fruits to ripen at different times; it solves the problem that multiple post - ripening fruits ripen simultaneously during storage at home, avoids food waste, and also provides a research basis for the preservation of other types of fruits and vegetables.

Description

Technical Field

[0001] The present invention belongs to the technical field of fruit packaging, and particularly relates to a modified atmosphere packaging for regulating the ripeness of post-ripening fruits. Background Art

[0002] Existing modified atmosphere packaging for vegetables: After pre-cooling the picked vegetables and fruits, they are sterilized and placed in a packaging container, so that the packaging container (the concentration of nitrogen is 85 - 95%, the concentration of oxygen is 1 - 8%, and the concentration of carbon dioxide is 1 - 6%)

[0003] Existing short-term circulation process for post-ripening fruits: Post-ripening fruits with a picking maturity of 75% - 80% are picked for short-term circulation. The temperature of the short-term circulation is 15°C - 18°C, and the ethylene generated in the environment is inhibited; ethylene is released to ripen the post-ripening fruits.

[0004] Large-scale ripening of post-ripening fruits causes a batch of fruits to ripen in one stage, or only preserves the packaged fruits without the function of ripening or inhibiting ripening. Post-ripening fruits include apples, bananas, peaches, apricots, plums, mangoes, persimmons, avocados, etc. Taking avocados as an example, avocados are rich in vitamins and unsaturated fatty acids and are a healthy food ingredient. Now they are increasingly appearing on family dinner tables. As a climacteric fruit, avocados produce a high concentration of ethylene during ripening and rely on ethylene for catalysis. However, ordinary boxed and bagged avocados are stacked together, and the ethylene generated during the process can promote the ripening of the surrounding avocados. Multiple avocados ripen simultaneously and the ripening is accelerated. After the climacteric, the storage time is greatly reduced, resulting in the need to consume multiple avocados in a short time; therefore, when consumers buy a large number of unripe post-ripening fruits, avocados, they cannot control the ripening of avocados at different times in a home environment and cannot eat ripe avocados every day. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems raised in the above background art and provide a modified atmosphere packaging for regulating ripeness.

[0006] To solve the above technical problems, the technical solution of the present invention is: A modified atmosphere packaging for regulating the ripeness of post-ripening fruits, including an outer composite cardboard box, a fruit contact layer, a release layer, and a packaging film; the fruit contact layer is provided on each inner side surface of the outer composite cardboard box, the release layer is respectively arranged between the left and right side surfaces of the outer composite cardboard box and the fruit contact layer, and the packaging film wraps around the outside of the outer composite cardboard box to block the gas inside and outside it.

[0007] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, the release layer provided between the left side of the outer composite cardboard box and the fruit contact layer is a 1-MCP release layer, and the release layer provided between the right side of the outer composite cardboard box and the fruit contact layer is an ethephon release layer.

[0008] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, the 1-MCP release layer and the ethephon release layer are respectively dry glue layers with 1-MCP and ethephon as active ingredients.

[0009] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, the dry glue layers of 1-MCP and ethephon are respectively 1-MCP and ethephon adsorbed on a cyclodextrin carrier, wherein the mass of 1-MCP accounts for 5% and ethephon accounts for 20%, and the mixture is added to an acrylate binder to make.

[0010] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, the outer composite cardboard box is provided with a plurality of intermediate microporous diaphragms and forms a plurality of avocado placement cavities.

[0011] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, each intermediate microporous diaphragm in the outer composite cardboard box is provided with a number of micropores, and the thickness and micropore size of each intermediate microporous diaphragm are different.

[0012] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, the pore diameters of the micropores of the plurality of intermediate microporous diaphragms in the outer composite cardboard box decrease sequentially from right to left, and the thicknesses increase sequentially.

[0013] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, there are three intermediate microporous diaphragms in the outer composite cardboard box. The micropore sizes are 150μm, 100μm, and 50μm sequentially from right to left, and the thicknesses are 20μm, 25μm, and 50μm sequentially from right to left.

[0014] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, the fruit contact layer is made mainly of EVA-modified and LDPE-modified resins.

[0015] In the above-mentioned modified atmosphere packaging for regulating the ripeness of post-ripening fruits, the outer composite cardboard box is processed from composite corrugated cardboard, and the encapsulation film wrapped around the outer composite cardboard box is composed of low-density polyethylene.

[0016] The beneficial effects of the present invention are:

[0017] The present invention utilizes the ethephon release layer on one side of the outer composite cardboard box to slowly release ethene and promote the ripening of raw fruits. The 1-MCP release layer on the other side slowly releases 1-MCP to form competitive inhibition with the ethene released by the fruits themselves, slowing down the ripening of avocados. At the same time, different specifications of microporous films in the middle block to form a plant hormone concentration gradient, effectively enabling post-ripening fruits to ripen at different times, solving the problem of multiple post-ripening fruits ripening simultaneously during home storage, avoiding food waste, and providing a research basis for the preservation of other post-ripening fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Please refer to Figure 1 , the present invention provides a modified atmosphere packaging for regulating the ripeness of post-ripening fruits, including an outer composite cardboard box 8, a fruit contact layer 6, a release layer 1, and a packaging film 4. The fruit contact layer 6 is provided on the inner sides of each side of the outer composite cardboard box 8. The release layer 1 is respectively provided between the left and right sides of the outer composite cardboard box 8 and the fruit contact layer 6. The release layer provided between the left side of the outer composite cardboard box 8 and the fruit contact layer 6 is the 1-MCP release layer 7, and the release layer 1 provided between the right side of the outer composite cardboard box 8 and the fruit contact layer 6 is the ethephon release layer 5. The 1-MCP release layer 7 and the ethephon release layer 5 are respectively dry adhesive layers with active ingredients of 1-MCP and ethephon. The dry adhesive layers of 1-MCP and ethephon are respectively 1-MCP and ethephon adsorbed on a cyclodextrin carrier, wherein the mass of 1-MCP accounts for 5% and the ethephon accounts for 20%, and the mixture is added to an acrylate adhesive to make.

[0022] The outer composite cardboard box 8 is provided with a plurality of intermediate microporous diaphragms 2, forming a plurality of fruit placement cavities 3. Each intermediate microporous diaphragm 2 in the outer composite cardboard box 8 is provided with a number of micropores. The thickness of each intermediate microporous diaphragm 2 and the size of the micropores are different. The aperture sizes of the micropores of the plurality of intermediate microporous diaphragms 2 in the outer composite cardboard box 8 decrease in sequence from right to left, and the thickness sizes increase in sequence; preferably, there are three intermediate microporous diaphragms 2 in the outer composite cardboard box 8, and the micropore sizes are 150μm, 100μm, and 50μm in sequence from right to left, and the thickness sizes are 20μm, 25μm, and 50μm in sequence from right to left.

[0023] The fruit contact layer 6 is made mainly of EVA-modified and LDPE-modified resins. The encapsulation film 4 is wrapped outside the outer composite cardboard box 8 to block the gas between its interior and exterior. The outer composite cardboard box 8 is processed from composite corrugated cardboard. The encapsulation film 4 wrapped outside the outer composite cardboard box is composed of low-density polyethylene.

[0024] The above has introduced in detail a modified atmosphere packaging for adjusting the ripeness of post-ripening fruits provided by the embodiments of the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the technical solution disclosed by the present invention; at the same time, for ordinary technical users in the field, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A modified atmosphere packaging for regulating the ripeness of post-ripening fruits, characterized in that: It includes an outer composite cardboard box (8), a fruit contact layer (6), a release layer (1), and a packaging film (4); the fruit contact layer (6) is disposed on each inner side surface of the outer composite cardboard box (8), the release layer (1) is respectively arranged between the left and right side surfaces of the outer composite cardboard box (8) and the fruit contact layer (6), and the packaging film (4) wraps the outside of the outer composite cardboard box (8) to block the gas between its interior and the exterior. A plurality of intermediate microporous membranes (2) are provided in the outer composite cardboard box (8) to form a plurality of fruit placement cavities (3); a number of micropores are provided on each intermediate microporous membrane (2) in the outer composite cardboard box (8), and the thickness and micropore size of each intermediate microporous membrane (2) are different; the aperture sizes of the micropores of the plurality of intermediate microporous membranes (2) in the outer composite cardboard box (8) decrease sequentially from right to left, and the thickness sizes increase sequentially. The release layer provided between the left side surface of the outer composite cardboard box (8) and the fruit contact layer (6) is a 1-MCP release layer (7), and the release layer (1) provided between the right side surface of the outer composite cardboard box (8) and the fruit contact layer (6) is an ethephon release layer (5).

2. The controlled atmosphere packaging for adjusting the ripeness of post-ripening fruits according to claim 1, characterized in that: The 1-MCP release layer (7) and the ethephon release layer (5) are dry adhesive layers with 1-MCP and ethephon as the active ingredients respectively.

3. The controlled atmosphere packaging for adjusting the ripeness of post-ripening fruits according to claim 2, wherein: The dry adhesive layers of 1-MCP and ethephon are 1-MCP and ethephon adsorbed on a cyclodextrin carrier respectively, wherein 1-MCP accounts for 5% and ethephon accounts for 20%, and the mixture is added to an acrylate adhesive to make it.

4. The controlled atmosphere packaging for adjusting the ripeness of post-ripening fruits according to claim 1, characterized in that: There are three intermediate microporous membranes (2) in the outer composite cardboard box (8), the micropore sizes are 150μm, 100μm, and 50μm sequentially from right to left, and the thickness sizes are 20μm, 25μm, and 50μm sequentially from right to left.

5. The controlled atmosphere packaging for adjusting the ripeness of post-ripening fruits according to claim 1, characterized in that: The fruit contact layer (6) is made mainly of EVA-modified and LDPE-modified resins.

6. An airtight packaging for adjusting the ripeness of post-ripening fruits according to any one of claims 1 to 5, characterized in that: The outer composite cardboard box (8) is processed from composite corrugated cardboard, and the packaging film (4) wrapping the outer composite cardboard box is composed of low-density polyethylene.

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