CN114148607B

CN114148607B - Biodegradable controlled atmosphere preservation box capable of preventing peel white frost damage

Info

Publication number: CN114148607B
Application number: CN202111392521.2A
Authority: CN
Inventors: 廖龙凤; 张家宝; 李庆丰; 范俊华; 孟正华; 王达飞; 彭文锴; 张龙; 廖文松
Original assignee: Jianglin Guizhou Hi Tech Development Co ltd
Current assignee: Jianglin Guizhou Hi Tech Development Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-08-16
Anticipated expiration: 2041-11-23
Also published as: CN114148607A

Abstract

The invention discloses a biodegradable modified atmosphere preservation box for preventing white frost damage of peel. Comprises a box body, wherein mutually independent accommodating grooves are formed in the box body; the cover body covers the opening of the box body and is sealed with the opening; wherein, the box body and the cover body are both prepared by biodegradable modified atmosphere fresh-keeping materials. On the basis of the development of the biodegradable modified atmosphere film in the previous period, the biodegradable modified atmosphere box is designed and prepared, and the material of the modified atmosphere film is prepared into the biodegradable modified atmosphere box similar to an egg box through an injection molding or plastic uptake process, so that the biodegradable modified atmosphere box is mainly used for preserving fruits with protective layers on the skins of the fruits such as the honey plums, the loquats, the blueberries and the like, and the preservation period of the fruits is greatly prolonged.

Description

Biodegradable controlled atmosphere preservation box capable of preventing peel white frost damage

Technical Field

The invention relates to the field of packaging material science, in particular to a biodegradable modified atmosphere preservation box for preventing white frost damage of peel.

Background

At present, fruit preservation methods mainly fall into two categories: the first is physical preservation technology, such as low-temperature cold storage, air-conditioned cold storage and the like; the second is chemical treatment, such as coating chemical antistaling agent. The physical preservation technology is safe, but has high cost and complex operation, thereby greatly limiting the practical application of the technology. The chemical treatment method is simple in treatment operation and has certain efficacy, but the adoption of the chemical treatment has a series of problems of affecting the physical health of consumers, polluting the environment, generating drug resistance by pathogenic bacteria and the like along with the edible safety.

In recent years, compared with common plastic preservative films, the self-gas-regulating preservative films, namely plastic preservative films, have the effect of regulating the permeability of oxygen, carbon dioxide and water vapor, can avoid the defects, and are gradually concerned by academia and industry. Modified atmosphere films are divided into two types, those made of non-degradable plastics and those made of biodegradable plastics. In view of environmental protection, biodegradable modified atmosphere films are a hot point of research and development.

However, the biodegradable modified atmosphere film belongs to film products, and fruits are mutually extruded and rubbed in the links of packaging, transportation and the like, so that waxy white frost (also called fruit powder) which has a protective effect on the surfaces of the fruits is damaged, and the preservation period of the fruits is artificially shortened.

Most of the waxy white creams are long-chain aliphatic compounds, including fatty acids, aldehydes, alcohols, etc., and in addition, cyclic compounds, sterol compounds, etc. The waxy white cream can prevent water from evaporating on one hand; secondly, the waxy white cream is insoluble in water, so that a moist environment can be prevented from being formed on the surface, and the impregnation of pathogenic bacteria is avoided; finally, the white cream is beneficial to human body, for example, oleanolic acid on the surface of grape has the activities of protecting liver, resisting cancer and virus, reducing blood sugar and lipid and improving immunity; resveratrol has the functions of regulating blood fat, delaying senility, regulating immunity, improving gastrointestinal tract function, etc.

Therefore, how to protect the natural protective layer (waxy white frost) on the surface of the fruit in the packaging and transportation process and further prolong the fresh-keeping period of the fruit is an urgent problem to be solved.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.

Therefore, the invention aims to overcome the defects in the prior art and provide the biodegradable modified atmosphere preservation box for preventing the white frost damage of the peel, the material of the modified atmosphere film is prepared into the biodegradable modified atmosphere box similar to an egg box through an injection molding or plastic uptake process, and the biodegradable modified atmosphere box is mainly used for preserving fruits with protective layers on the skins of the fruits such as honey plum, loquat, blueberry and the like, so that the preservation period of the fruits is greatly prolonged.

In order to solve the technical problems, the invention provides the following technical scheme: a biodegradable controlled atmosphere preservation box for preventing white frost damage of fruit peels, which comprises,

the box body is internally provided with mutually independent accommodating grooves; and the number of the first and second groups,

the cover body covers the opening of the box body and is sealed with the opening;

wherein, the box body and the cover body are both prepared by biodegradable modified atmosphere fresh-keeping materials.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the cover body is fixed with the box body through a buckle assembly, and a gap between the cover body and the box body is sealed by a sealing element.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the buckle component comprises a buckle which is provided with a buckle body,

the bent buckle is positioned on the side part of the cover body; and the number of the first and second groups,

the buckle seat is positioned on the side part of the box body;

and the bent buckle is connected with the buckle seat along the opposite direction covered by the cover body.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the snap assembly further comprises a stop located within the cap body; when the bent buckle is connected with the buckle seat, the stop piece is contacted with the box body.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the sealing element is positioned on one side of the box body facing the cover body, and the sealing element can be in close contact with the bent buckle and/or the stop piece.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the sealing piece and the box body are arranged at an angle, and the length of the sealing piece is greater than the distance between the stop piece and the bent buckle.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the side of the buckle seat is provided with an inclined plane which can be contacted with the end part of the bent buckle, and when the bent buckle is contacted with the inclined plane, the bent buckle is bent towards the direction far away from the box body.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: when the bent buckle is connected with the buckle seat, the sealing element is arranged between the stop piece and the box body.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the biodegradable modified atmosphere fresh-keeping material comprises polylactic acid, a biodegradable dispersed phase, an ethylene remover and an antibacterial agent; 74.95-98.89 parts of polylactic acid, 1-20 parts of biodegradable dispersed phase, 0.1-5 parts of ethylene remover and 0.01-0.05 part of antibacterial agent.

As a preferred scheme of the biodegradable controlled atmosphere preservation box for preventing the white frost damage of the peel, the invention comprises the following steps: the degradable dispersion phase comprises one of polybutylene adipate-terephthalate, polybutylene succinate and polycaprolactone; the ethylene remover is one or more of nano zinc oxide, nano titanium dioxide, molecular sieve, activated carbon and bentonite; the antibacterial agent is at least one of nano silver, star anise oil, nano titanium dioxide, cassia oil, nano zinc oxide, cinnamon essential oil and eucalyptus oil.

The invention has the beneficial effects that:

on the basis of the development of the biodegradable modified atmosphere film in the previous period, the biodegradable modified atmosphere box is designed and prepared, the material of the modified atmosphere film is prepared into the biodegradable modified atmosphere box similar to an egg box through an injection molding or plastic uptake process, and the biodegradable modified atmosphere box is mainly used for preserving fruits with self-protection layers on the skins, such as honey plums, loquats, blueberries and the like, and greatly prolongs the preservation period of the fruits.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

FIG. 1 is a schematic view of a connection structure of a cover and a case according to the present invention;

FIG. 2 is a schematic view of another connection structure of the cover and the box according to the present invention;

FIG. 3 is a schematic structural view of the fastening seat of the case according to the present invention;

FIG. 4 is a schematic view of a snap feature of the present invention that facilitates storage;

FIG. 5 is a schematic view of a snap structure for facilitating disassembly according to the present invention;

FIG. 6 is a schematic structural view of the present invention with the buckles in an independent distribution;

FIG. 7 is a schematic view of the structure of the stopper of the present invention in an independently distributed state;

FIG. 8 is a schematic diagram of the operation of the sealing clip according to the present invention;

FIG. 9 is a schematic view of a curved buckle with a break in accordance with the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

As shown in fig. 1, a first embodiment of the present invention provides a biodegradable controlled atmosphere preservation box for preventing white frost damage of fruit peel, which comprises a box body 100 and a cover body 200, wherein the box body 100 is used for containing fruits, and is provided with a containing groove N1 which are independent from each other, and the fruits are independently placed in the containing groove N1 without contact with each other; the cover 200 is used to cover the opening of the box 100, and a sealing structure is formed between the cover 200 and the box 100 to keep the space inside the box 100 in a sealed state; wherein, the cover 200 may be connected with the box 100 at one side to form a whole, and the cover and the box are integrally formed, as shown in fig. 1, the cover 200 is turned over to realize the sealing connection with the box 100; the cover 200 and the case 100 may be separate parts, and as shown in fig. 2, the cover 200 is hermetically connected by covering the opening of the case 100.

The sealing structure may be any one of the structures in the prior art, for example, the sealing structure may be a snap structure between the cover 200 and the case 100 to seal the two, or may be an adhesive sealing structure, or may be a staple fixing structure to make the two in sealing contact; for those skilled in the art, other existing sealing structures may be used without creative efforts.

The box body 100 and the cover body 200 are both prepared from biodegradable modified atmosphere fresh-keeping materials, and the specific preparation method comprises the steps of mixing 3 parts of nano titanium dioxide, 0.5 part of molecular sieve, 0.03 part of nano silver and 10 parts of PBAT with 86.49 parts of PLA, melting and plasticizing in a double-screw extruder, flowing out through a die head, guiding to a casting roller, cooling, and rolling by a traction roller to obtain a casting film; wherein the temperature of each section of the double-screw extruder is controlled at 100 ℃, 185 ℃, 190 ℃, 200 ℃ and 185 ℃; controlling the melt draw ratio of the extrusion casting machine to be 25; and (4) carrying out vacuum forming on the cast film obtained by rolling by a vacuum forming machine to obtain the modified atmosphere preservation box. The casting film forming method comprises the steps of firstly adjusting the distance of a scraper of a film coating device to be 180-220 mu m, then pouring the liquid after static defoaming on a glass plate, starting the scraper to coat a film at the film coating speed of 3m/min, and finally placing the film in a 60 ℃ drying oven to be dried for 12 hours.

Measuring physical performance indexes of the obtained air-conditioned preservation box, wherein the physical performance indexes comprise oxygen transmission rate, carbon dioxide transmission rate and water vapor transmission rate, and the oxygen transmission rate and the carbon dioxide transmission rate refer to GB/T1038-; the water vapor transmission rate refers to a cup method which is a test method for water vapor permeability of plastic films and sheets in GB/T1037-1988. The test results showed that the oxygen transmission coefficient was 2.05X 10 ^-5 cm ³ ·m/m ² d.Pa, carbon dioxide transmission coefficient of 4.72X 10 ^-4 cm ³ ·m/m ² d.Pa, water vapor transmission coefficient of 3.82X 10 ^-5 g·m/m ² d.Pa, ethylene elimination rate 95.8%; the bacteriostasis rate of staphylococcus aureus is 92.6 percent, the bacteriostasis rate of escherichia coli is 96.4 percent, and the bacteriostasis rate of aspergillus niger is 93.2 percent%。

And (3) testing the preservation effect of the obtained modified atmosphere preservation box, wherein the testing mode is as follows: select complete, harmless, hardness and color and luster unanimous, the more homogeneous same batch of bee sugar plum of size, independent placing in the storage tank N1 of box body 100, cover the opening part of box body 100 with lid 200 and make and realize sealedly through buckle structure between the two, normal atmospheric temperature is preserved, through whether the problem such as loss of water, shrivelled, play water, rotten appears in the observation bee sugar plum directly perceived every day, reaches the fresh-keeping term when the bee sugar plum begins to appear rotting. A commercially available fruit preservation box with a separate placing groove is used as a comparison example 1, and the testing method is completely the same as the method; the comparison example 2 is a gas-conditioned preservative film, and the difference of the test method is that the bee sugar plums are directly wrapped and sealed by the gas-conditioned preservative film; the test results are shown in table 1.

TABLE 1

	Honey plum preservation period (Normal temperature preservation)
		The invention	15 days
Comparative example 1	3 days
		Comparative example 2	5 days

The test results show that the freshness date of the invention of our invention is far longer than that of the comparison examples 1 and 2, because the obtained modified atmosphere preservation box has good air permeability under the condition of sealing, and because the independent accommodating grooves N1 are arranged, the natural protective layer on the surface of the fruit is protected in the packaging and transportation process, thereby greatly prolonging the freshness date of the fruit.

Example 2

As shown in fig. 3 to fig. 6, the present embodiment is different from the first embodiment in that the present embodiment employs a buckle structure 300 capable of being integrally formed by plastic suction to achieve the sealing purpose, the buckle structure 300 includes a buckle seat 302 located at the peripheral side of the opening of the box 100 and a curved buckle 301 located on the cover 200 and matching with the buckle seat, and the peripheral side is the side in the circumferential direction of the opening side of the box 100, as shown in fig. 3; the fastener base 302 extends towards the inner side of the box 100 at the peripheral side of the opening of the box 100, preferably extends in the horizontal direction, as shown in fig. 4, or extends towards the outer side of the box 100, as shown in fig. 5; the snap structure 300 shown in fig. 4 is not easy to disassemble, which is more beneficial for storage purposes; the snap structure 300 shown in fig. 5 is easy to disassemble, and is more favorable for marketing purposes.

It should be noted that, no matter how the position of the buckle seat 302 is, there is a curved buckle 301 adapted to it, the above-mentioned cooperation means that the curved buckle 301 establishes connection with the buckle seat 302 along the opposite direction covered by the cover 200, generally speaking, the cover 200 covers the top opening of the box 100 from above, and covers the rear curved buckle 301 to establish connection with the buckle seat 302 from below, and the buckle seat 302 limits the upward movement of the curved buckle 301, thereby forming a buckle fixation; wherein, the bent buckles 301 may be independent structures uniformly distributed along the circumferential direction of the cover body 200, as shown in fig. 6; or may be a continuous structure extending in the circumferential direction of the cap body 200.

It should be noted that the buckle assembly 300 further includes a stop member 303, and the stop member 303 is located on the cover body 200; when the curved buckle 301 is connected with the buckle base 302, the stop member 303 is in contact with the box body 100, as shown in fig. 3 or fig. 4, the stop member 303 is located beside the curved buckle 301, the stop member 303 is also in contact with the buckle base 302, the stop member 303 limits the downward movement of the curved buckle 301, and under the combined action of the buckle base 302 and the stop member 303, the position limitation of the curved buckle 301 and the cover body 200 is realized.

The stopper 303 is integrally formed with the cover 200, the stopper 303 is a part of the cover 200 and may be a protrusion protruding from the surface of the cover 200, generally, the cover 200 covers the top opening of the box 100 from above, and the stopper 303 is located on the inner surface of the cover 200.

Example 3

As shown in fig. 3 to 7, the present embodiment is different from the above embodiments in that the gap between the cover 200 and the case 100 is closed by a sealing member 400, the sealing member 400 is located on the side of the case 100 facing the cover 200, the sealing member 400 is integrally formed with the case 100, and the sealing member 400 is a continuous structure extending along the circumferential direction of the cover 200.

The sealing member 400 can be in close contact with the bent buckle 301 and/or the stop member 303, wherein the stop member 303 is a plurality of protrusions uniformly distributed along the circumferential direction of the cover body 200, as shown in fig. 7, the sealing member 400 is mainly in close contact with the bent buckle 301 to close a gap between the bent buckle 301 and the buckle base 302; if the stopper 303 is a continuous structure extending along the circumferential direction of the cover body 200, the sealing member 400 is mainly in close contact with the stopper 303, closing the gap between the stopper 303 and the buckle base 302; of course, the sealing member 400 may be in close contact with both the turnbuckle 301 and the stopper 303 while closing gaps between the turnbuckle 301 and the buckle holder 302 and between the stopper 303 and the buckle holder 302.

Specifically, as shown in fig. 3, the sealing element 400 is located on the upper surface of the buckle base 302, the sealing element 400 is in a sheet structure, the sealing element 400 is disposed at an angle with respect to the box 100, specifically, the sealing element 400 is disposed at an acute angle of 10 to 75 ° with respect to the upper surface of the buckle base 302, and the length of the sealing element 400 is greater than the distance between the stop member 303 and the bent buckle 301.

As shown in fig. 5, when the curved buckle 301 is connected with the buckle base 302, the sealing element 400 is disposed between the stop member 303 and the box body 100 for closing a gap between the stop member 303 and the buckle base 302, and at this time, the sealing element 400 is in close contact with an inner side surface of the curved buckle 301, although the sealing element 400 does not directly act between the curved buckle 301 and the buckle base 302, due to a continuous structure of the sealing element 400, the gap between the curved buckle 301 and the buckle base 302 can still be closed by the sealing element 400, that is, the sealing purpose is achieved.

Example 4

As shown in fig. 5 to 9, the present embodiment is different from the above embodiments in that the side of the buckle holder 302 is provided with a slope S1 capable of contacting with the end of the curved buckle 301, the slope S1 is inclined towards the outside and the lower part of the box body 100, and the buckle holder 302 is provided with a buckle point 302a extending along the circumferential direction at the lower end of the slope S1;

the curved buckle 301 comprises a hook 301a and an elastic arm 301b, wherein the hook 301a is in the shape of an upward curved hook, and a gap is left between the hook 301a and the elastic arm 301b and can accommodate a buckle point 302 a;

as shown in fig. 8, when the hook 301a contacts the inclined plane S1, the elastic arm 301b bends away from the case 100, and when the hook 301a disengages from the inclined plane S1, the elastic arm 301b resets toward the inner side of the case 100, so that the fastening point 302a finally enters the gap to complete the fastening and fixing action; since the length of the sealing member 400 is greater than the distance between the stop member 303 and the buckle 301, in the process, when the elastic arm 301b moves away, the sealing member 400 is located between the stop member 303 and the buckle 301, and when the elastic arm 301b resets, the elastic arm 301b presses the sealing member 400 toward the inner side of the case 100, so that the sealing member 400 and the elastic arm 301b (or the buckle 301) are in close contact.

If the curved buckle 301 has a continuous structure extending along the circumferential direction of the cover 200, a plurality of slits D are further provided in the curved buckle 301, and as shown in fig. 9, it is preferable that four slits D are provided at four corners of the cover 200, so that the curved buckle 301 has four independent structures, thereby achieving the purpose of bending the elastic arm 301b in a direction away from the case 100.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides a prevent damaged biological degradation controlled atmosphere preservation box of peel white frost which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the box body (100), the box body (100) is internally provided with mutually independent containing grooves (N1); and the number of the first and second groups,

the cover body (200) covers the opening of the box body (100) and is sealed with the opening;

wherein, the box body (100) and the cover body (200) are both prepared by biodegradable modified atmosphere fresh-keeping materials;

the cover body (200) is fixed with the box body (100) through a buckle assembly (300), and a gap between the cover body (200) and the box body (100) is sealed by a sealing piece (400);

the snap-on assembly (300) comprises,

a bent buckle (301) positioned at the side of the cover body (200); and the number of the first and second groups,

a buckle seat (302) positioned at the side part of the box body (100);

the bent buckle (301) is connected with the buckle seat (302) along the opposite direction covered by the cover body (200);

the snap assembly (300) further comprises a stop (303), the stop (303) being located within the cover (200); when the bent buckle (301) is connected with the buckle seat (302), the stop piece (303) is contacted with the box body (100);

the sealing element (400) is positioned on one side of the box body (100) facing the cover body (200), the sealing element (400) is integrally formed with the box body (100), the sealing element (400) is a continuous structure extending along the circumferential direction of the cover body (200), and the sealing element (400) can be tightly contacted with the bent buckle (301) and/or the stop piece (303);

the sealing element (400) and the box body (100) are arranged at an angle, and the length of the sealing element (400) is greater than the distance between the stop piece (303) and the bent buckle (301);

the side part of the buckle seat (302) is provided with an inclined surface (S1) capable of contacting with the end part of the bent buckle (301), and when the bent buckle (301) contacts with the inclined surface (S1), the bent buckle (301) bends towards the direction far away from the box body (100);

when the bent buckle (301) is connected with the buckle seat (302), the sealing element (400) is arranged between the stop element (303) and the box body (100), and at the moment, the sealing element (400) is in close contact with the inner side surface of the bent buckle (301).

2. The biodegradable modified atmosphere preservation box for preventing white frost damage of pericarp as claimed in claim 1, characterized in that: the biodegradable modified atmosphere fresh-keeping material comprises polylactic acid, a biodegradable dispersed phase, an ethylene remover and an antibacterial agent; 74.95-98.89 parts of polylactic acid, 1-20 parts of biodegradable dispersed phase, 0.1-5 parts of ethylene remover and 0.01-0.05 part of antibacterial agent.

3. The biodegradable modified atmosphere preservation box for preventing white frost damage of pericarp as claimed in claim 2, characterized in that: the biodegradable dispersed phase comprises one of polybutylene adipate terephthalate, polybutylene succinate and polycaprolactone; the ethylene remover is one or more of nano zinc oxide, nano titanium dioxide, molecular sieve, activated carbon and bentonite; the antibacterial agent is at least one of nano silver, star anise oil, nano titanium dioxide, cassia oil, nano zinc oxide, cinnamon essential oil and eucalyptus oil.