CN201501603U - Vegetable and fruit fresh-keeping bag containing component for preventing plant ethylene reaction - Google Patents

Abstract

The utility model discloses a vegetable and fruit fresh-keeping bag containing ingredients for preventing plant ethylene reaction, which is characterized in that: at least one side of the composite material is provided with an opening and is formed by mutually bonding a plastic film and a nonwoven fabric laminated body which are overlapped up and down and then arranged at the edge, wherein the nonwoven fabric laminated body comprises at least one thermoplastic composition and at least one nonwoven fabric. The utility model discloses also disclose a vegetables and fruits fresh-keeping cover bag that contains and hinders plant ethylene reaction composition, characterized by: which is formed of a plastic film and has an opening on at least one side, wherein a nonwoven laminate is bonded to at least a part of the inner layer surface of the plastic film hollow envelope, and wherein the nonwoven laminate comprises at least one thermoplastic composition and at least one nonwoven fabric. The utility model particularly relates to a hollow vegetable and fruit bag with at least one open end and the functions of keeping freshness and adjusting the physiological functions of the vegetable and fruit.

Description

Fresh-keeping bags for vegetables and fruits containing ingredients that hinder plant ethylene reaction

technical field

The invention relates to a vegetable and fruit bag which can preserve freshness and regulate the physiological functions of vegetables and fruits through the combination of a non-woven laminate containing a plant ethylene reaction inhibitor and a plastic film.

Background technique

Ethylene is an important growth regulator that regulates plant growth, development, aging, and environmental stress. It mainly affects related processes such as fruit ripening, flower recession, and leaf abscission. It is often formed in large quantities during plant storage and transportation. The commercial value of fresh fruits, vegetables or flowers is often reduced by excess ethylene gas. Extensive research has been devoted to the control of ethylene gas for post-harvest preservation of fresh produce.

U.S. Patent No. 5,518,988 discloses cyclopropene (cyclopropene) and its derivatives, such as: cyclopropene, 1-methylcyclopropene (1-methylcyclopropene; 1-MCP), 3-methylcyclopropene (3-methylcyclopropene) and 3,3-Dimethylcyclopropene (3,3-dimethylcyclopropene) can compete with ethylene to bind to plant ethylene receptors, thereby effectively inhibiting the binding of ethylene to plant cells and inhibiting the physiological effects of ethylene.

Among the aforementioned compounds, 1-methylcyclopropene has the best effect on inhibiting the action of ethylene. The compound is gaseous at 20° C., has no peculiar smell, requires low concentration for treatment, and is non-toxic to humans and animals within the effective concentration range. However, 1-methylcyclopropene is generally unstable due to its high chemical activity. U.S. Patent No. 6,017,849 discloses a method of molecularly embedding 1-methylcyclopropene gas with a carrier such as α-cyclodextrin to form a powdery complex, which can be used to stabilize the reactivity and property of 1-methylcyclopropene gas. Instability, the embedding compound can be applied or delivered to the plant simply by adding water. US Patent No. 6,897,185 discloses the preparation and use of 1-methylcyclopropene foaming lozenges, which makes the storage, transportation and application of the compound more convenient and safe, and successfully solves the problems caused by ethylene to plants.

The effective dose of 1-methylcyclopropene applied to plants is 0.1 to 1.0 ppm (vol/vol). The current commercial 1-methylcyclopropene powder product requires a large amount of water (for example: 10 to 20 times the weight of the 1-methylcyclopropene/α-cyclodextrin powder compound) to coordinate the release. China Taiwan No. 265005 Invention Patent discloses a method of using non-woven fabric, aluminum foil or corrugated cardboard as a cyclopropene compound release carrier, wherein the cyclopropene compound agent is blended with a thermoplastic composition and laminated to the non-woven fabric layer, aluminum foil layer or On the corrugated cardboard layer, a laminate is formed to hinder the ethylene reaction of plants. In said patent, the 1-methylcyclopropene embedded in the carrier does not need additional water, and can be released only by the humidity in the environment to act on plants to hinder the progress of plant ethylene reaction. Therefore, compared with the previous powder-type and foam-type lozenges, China Taiwan Invention Patent No. 265005 has better application flexibility and ease of use.

However, the laminate of the invention patent No. 265005 in Taiwan, China cannot prevent the vegetables and fruits from withering due to the loss of water during the low-temperature refrigeration process, and cannot adjust the gas permeability such as oxygen and carbon dioxide, thereby prolonging the storage period of the vegetables and fruits. Therefore still need new technology and improvement to further increase the preservation and storage period of fruits and vegetables.

Utility model content

The present invention is based on the characteristics that the plastic film bag can reduce water loss during storage and transportation of fruits and vegetables, and have different permeability to gases such as oxygen and carbon dioxide. The laminates are combined to obtain a vegetable and fruit bag that has both fresh-keeping and physiological functions of regulating the vegetable and fruit. The vegetable and fruit bag of the present invention not only has wide application, but also is more convenient for users to use.

Therefore, the object of the present invention is to provide a fresh-keeping bag for vegetables and fruits containing components that hinder plant ethylene reaction, which is characterized in that: at least one side has an opening, and a piece of plastic film and a piece of non-woven fabric laminate are stacked up and down and then Bonded to each other at the edges, wherein the nonwoven laminate comprises at least one layer of thermoplastic composition and at least one layer of nonwoven fabric.

Another object of the present invention is to provide a fresh-keeping bag for vegetables and fruits containing ingredients that inhibit the ethylene reaction of plants, which is characterized in that: it is formed by a plastic film and has an opening on at least one side, wherein the non-woven fabric laminate is bonded to the At least part of the inner layer surface of the plastic film hollow bag, and wherein the non-woven fabric laminate comprises at least one layer of thermoplastic composition and at least one layer of non-woven fabric. Preferably, the surface of the inner layer of the vegetable and fruit bag is completely covered by a non-woven fabric laminate.

According to a specific aspect of the present invention, both upper and lower ends of the fruit and vegetable bag are open.

According to another specific aspect of the present invention, only one side of the fruit and vegetable bag is open.

The invention utilizes thin-layer coating and humidity-controlled release technology to coat the thermoplastic composition containing the medicament that effectively hinders the plant ethylene binding site on the non-woven fabric, and then compound it with a plastic film to form a bag. When the vegetable and fruit products are stored in the vegetable and fruit bag of the present invention, the moisture evaporated from the vegetable and fruit products can cause the components that hinder the reaction of ethylene to be slowly released from the non-woven fabric laminate into the gas atmosphere in the bag in the form of gas, Block the combination of ethylene and fruits and vegetables, and delay the aging of fruits and vegetables. On the other hand, the plastic film used for bagging vegetables and fruits also has the function of preventing the fruits and vegetables from dehydration and withering, so as to achieve the effect of freshness preservation. In addition, the outer surface of the fruit and vegetable bag of the present invention can be printed and also used as a publicity, which is beneficial to the sales of fruit and vegetable products.

The fruit and vegetable bagging of the present invention can be applied to the whole process of subsequent storage, transportation and even sales of fruits and vegetables after harvesting.

Description of drawings

1(a) and 1(b) show a specific implementation aspect of the fruit and vegetable bagging according to the present invention.

2( a ) and 2 ( b ) show another embodiment of the vegetable and fruit bagging according to the present invention.

Figures 3(a) and 3(b) show yet another embodiment of the vegetable and fruit bagging according to the present invention.

Detailed ways

According to the present invention, the term "vegetables and fruits" generally refers to harvested or fresh-cut vegetables, fruits and cut flowers, preferably climacteric or perishable.

Vegetables that can be used in the present invention include, but are not limited to: broccoli, cauliflower, bok choy, tomato, lettuce, pod peas, celery, cabbage, potato, carrot, onion, Chinese toon, soybean, broad bean, pepper, asparagus, coriander, Cucumbers, courgettes, bitter melons, shallots, daylilies, artichokes, navel beans, sweet corn, and eggplants.

Fruits that can be used in the present invention include, but are not limited to: peaches, cherries, nectarines, apricots, plums, apples, pears, melons, berries, bananas, avocados, guavas, kiwis, mangoes, passion fruit, persimmons, and watermelon etc.

The types of cut flowers that can be used in the present invention include, but are not limited to: various orchids, carnations, lilies, snapdragons, rhododendrons, hydrangeas, roses, hibiscus, Christmas red, cactus, tulips, crabapple, narcissus, morning glory, Gladiolus, anemone, bougainvillea, bellflower, silver clematis, anemone, aster, camellia, cockscomb, chrysanthemum, primrose, sweetsnow, silvery persimmon, dahlia, Dutch iris, agapanthus, chrysanthemum , African Lily and Carnation etc.

A nonwoven laminate useful in the present invention comprises at least one layer of a thermoplastic composition comprising an agent that blocks ethylene binding sites in plants and a thermoplastic polymer or copolymer and at least one layer of nonwoven fabric. The weight ratio of the thermoplastic polymer or copolymer to the agent that hinders the plant ethylene binding site is about 2000:1 to about 1:1, preferably about 100:1 to about 1:1, more preferably about 20:1 to about 1:1. The method of bonding the thermoplastic layer to the nonwoven layer may be any method known to those skilled in the art, for example, the thermoplastic layer may be bonded to the nonwoven by fusion bond lamination or extrusion lamination.

According to the present invention, agents that block ethylene binding sites in plants include all compounds known to inhibit ethylene responses in plants, such as, but not limited to, cyclopropene, 1-methylcyclopropene, 3-methylcyclopropene, 3,3- Dimethylcyclopropene, methylenecyclopropane, diazocyclopentadiene, trans-cyclooctene, cis-cyclooctene, 2,5-norbornadiene, its derivatives and mixtures thereof. Related background technology, such as U.S. No. 3,879,188, 5,100,462, 5,518,988, and No. 6,017,849 patents, have been mentioned with the Biological Growth Regulatory Journal (Plant Growth Reg.) 9,157-164,1990 of people such as Sisler (Sisler) manner is fully incorporated into this specification. A preferred agent to block ethylene binding sites in plants is 1-methylcyclopropene (1-MCP), for example, 1-methylcyclopropene commercially packaged in any powder form.

A wide variety of thermoplastic polymers or copolymers are suitable for use in forming the layers of the thermoplastic composition of the present invention, including, but not limited to, generally solid-state oxyalkanoyl polymers or dialkanoyl polymers, optionally in the form of poly Vinyl alcohol or starch polymers are blended and film-forming; olefin-based polymers, including the most commonly used ethylidene- or propylene-based polymers, such as polyethylene and polypropylene; and olefin-based Main copolymers such as ethylene-vinyl acetate (EVA), ethylene-methyl acrylate (EMA) and ethylene acrylic acid (EAA); and copolymers of the aforementioned polyolefins.

According to the present invention, the ethylene blocker releasable thermoplastic composition layer comprised by the nonwoven laminate may further comprise fillers for conventional tablet or powder form. Suitable additional fillers include, but are not limited to, antimicrobial agents, polymeric absorbents (eg, sodium polyacrylate), polyglucosamines, dextrins, clays, and montmorillonites.

The term "nonwoven" as used herein refers to a generally defined planar structure that is relatively flat, elastic, porous, and composed of short fibers or continuous filaments. The non-woven fabric used in the present invention is any non-woven fabric commonly used by those skilled in the art. Suitable nonwovens include, but are not limited to, polyethylene fibers, polypropylene fibers, polyester fibers, rayon fibers, cellulosic fibers, and nylon fibers, and blends of such fibers. In the present invention, the weight of the non-woven fabric used really depends on the actual application. Preferably, the nonwoven fabric used in the present invention has a weight of about 20 to 300 g/m2, preferably about 30 to 150 g/m2.

According to a specific embodiment of the present invention, on the non-woven fabric or in the thermoplastic composition layer, if necessary, further coat or add substances that inhibit microbial growth, such as: chitin, nisin, streptomycin, sodium acetate dehydrate , hexadienates, propionates, benzoates, biphenyls, metal ions (eg silver, copper, zinc, molybdenum and cobalt, etc.) or mixtures thereof. Therefore, in addition to the functions of keeping fresh and inhibiting the ethylene reaction of fruits and vegetables, the bagging for fruits and vegetables of the present invention can effectively inhibit the reproduction of disease microorganisms of fruits and vegetables, thereby enhancing the effect of keeping fruits and vegetables fresh.

The basis weight of the nonwoven laminates of the present invention will indeed depend on the desired dosage of ethylene blockers for the treatment. Generally, the layer of the thermoplastic composition releasable ethylene blocker applied to the nonwoven layer has a basis weight of about 7 to 50 grams/square meter, preferably about 10 to 35 grams/square meter.

In accordance with the present invention, the nonwoven laminate may be extended to a multilayer structure comprising more than one layer of the ethylene blocker releasable thermoplastic composition and more than one layer of the nonwoven fabric. The order and configuration of layers in a multi-layer structure really depends on the actual use case. Preferably, the layers of the thermoplastic composition releasable ethylene blocker and the non-woven fabric layer are arranged alternately in the multilayer structure.

The plastic film that is applicable to fruit and vegetable bag of the present invention can be made by following material, includes but not limited to, polyethylene (PE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE) ), polyvinyl chloride (PVC), polypropylene (PP) or their laminates.

The vegetable and fruit bag of the present invention can be composed of the aforementioned plastic film and non-woven fabric laminate in various forms. In addition, the shape of the fruit and vegetable bag of the present invention is not particularly limited. According to a specific aspect of the present invention, the vegetable and fruit bag of the present invention is formed by stacking a piece of plastic film and a piece of non-woven fabric laminated up and down and then bonding each other at the edge. According to another specific aspect of the present invention, the main body of the vegetable and fruit bag of the present invention is formed by a plastic film, and a non-woven fabric laminate is bonded to at least part of the inner surface of the plastic film hollow bag, preferably , the non-woven laminate covers the entire surface of the inner layer of the plastic film hollow bag.

At least one side of the fruit and vegetable bag of the present invention is in the shape of an opening, and an additional sealing device may be provided at the opening as the case may be. According to a specific aspect of the present invention, the fruit and vegetable bag of the present invention refers to a hollow fruit and vegetable bag whose upper and lower ends are open. According to another specific aspect of the present invention, only one side of the vegetable and fruit bag of the present invention is open.

The preferred structure of the vegetable and fruit bag provided by the present invention will be described in detail below with reference to FIGS. 1 to 3 , which is not intended to limit the scope of the present invention. Any modifications and changes that can be easily achieved by those with ordinary knowledge in this technical field are included in the disclosure content of this specification.

As shown in Figure 1, the non-woven fabric laminate 1 and the plastic film 2 can be cut into appropriate sizes, and the two can be stacked and bonded to each other at the edges to form a fruit and vegetable bag with openings at the upper and lower ends.

Figure 2 shows another embodiment of the fruit and vegetable bag of the present invention, in which a plastic film 2 is used to form the main body of the bag, and a non-woven fabric laminate 1 is bonded to at least part of the bag formed by the plastic film 2 layer surface. In addition, the fruit and vegetable bag of the present invention can also be shown in FIG. 3 , wherein the outer layer is a plastic film 2 and the inner layer is a non-woven fabric laminate 1 .

Generally speaking, the method for manufacturing the fruit and vegetable bag of the present invention is not particularly limited, and any known method in the industry can be used for manufacturing the fruit and vegetable bag of the present invention. Furthermore, methods of bonding plastic films to nonwovens are also known to those skilled in the art, such as, but not limited to, high frequency bonding, ultrasonic bonding, thermal bonding or adhesive bonding.

Without further elaboration, one skilled in the art can, using the above disclosure and the following examples, utilize the present invention to its fullest extent. The following examples are only used to illustrate how those skilled in the art operate the method of the patent right of this application but do not limit the remaining disclosure in any way.

Example 1: Manufacturing method

Preparation of nonwoven laminates

(1) Ethylene-ethyl acetate (EVA), 1-methylcyclopropene (1-MCP) and sodium polyacrylate were mixed in a weight ratio of 57:38:5. Among them, 1-MCP is a commodity (Litong Co., Ltd., Taipei, Taiwan, China); sodium polyacrylate is a commonly used polymeric absorbent.

(2) Use a hot-melt adhesive laminating machine to laminate the mixture obtained in the above (1) step with an amount of 12g/ ^m2 on a 50g/ ^m2 non-woven fabric (polyethylene+rayon), above the work area A scattering device is provided to supply hot melt adhesive powder, and the amount added per unit area can be determined by the speed of the quantitative roller.

(3) The nonwoven fabric laminate was cut into a trapezoidal shape (upper base 12 cm, lower base 40 cm, height 50 cm).

The preparation of vegetable and fruit bagging of the present invention

(1) Use automatic heat-sealing and heat-cutting bag-making equipment to cut and bond non-woven fabric laminates and plastic films (PP/PE composite materials) for bag-making operations.

(2) The heat-sealing temperature is set at 150°C, so that the sealing parts of the hypotenuses on both sides of the plastic film are transformed into a viscous flow state, and a pressure of 3N/mm ² is applied to make it the same as that of the non-woven laminate after the upper and lower correspondences The beveled edges are fusible and retain their strength when cooled.

Example 2: 1-MCP release effect of non-woven fabric laminate

Cut the non-woven fabric laminate to 10×10cm ² , put it in a 60mL gas detection bottle, spray the surface of the non-woven fabric laminate with water and close the bottle cap immediately, use the injection needle to extract the gas in the 0.5mL gas detection bottle , into a gas chromatograph to track and detect the 1-MCP release effect of the non-woven fabric laminate.

Table 1 shows the release of 1-MCP from nonwoven laminates. The results showed that about 70% of the 1-MCP was released within 5 minutes after the nonwoven laminate was sprayed wet, and it was fully released after one hour.

Table 1

Example 3: Fresh-keeping effect

Cut oncidiums are bagged to prolong their vase life. The cut flowers were treated with the bagging of the present invention (the non-woven fabric laminate in the bag was sprayed with about 10 mL of water), the general bagging and the control group without bagging, and stored at 25°C for observation. The results are as shown in Table 2. After 7 days, the general bagging group and the non-bagging control group had flowers drooping and limp phenomenon, while the bagging group of the present invention still kept the hard and emerald green at the top of the flower main stem. On the 10th day, the general bagging group began to drop flowers, and it was found that there was water-soaked yellowing and rot at the incision of the stem. On the 14th day, counting the number of undropped flowers on the main flower stem, it was found that the most serious deterioration was the general bagging group (2 to 3 flowers left), followed by the no bagging control group (3 to 4 flowers left), and the group with the most severe deterioration. The bagging group of the present invention is the best (5 to 6 flowers left). From the sequence of deterioration phenomena, the count of remaining flowers and the phenomenon of flower drooping, the bagging of the present invention does have the effect of preserving freshness and delaying deterioration.

Table 2

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the appended claims.

Claims (7)

1. fresh-keeping bagging of vegetables and fruits that contains the counteracting ethylene response in plants composition, it is characterized in that: its at least one side tool opening, and bonding mutually and form in edge again after stacked up and down by a slice plastic sheeting and a slice nonwoven layer compound, wherein said nonwoven layer compound comprises one deck thermoplastic compounds and layer of non-woven fabric at least at least.

2. the fresh-keeping bagging of vegetables and fruits that contains the counteracting ethylene response in plants composition according to claim 1, it is characterized in that: the two ends up and down of described vegetables and fruits bagging are all opening-like.

3. the fresh-keeping bagging of vegetables and fruits that contains the counteracting ethylene response in plants composition according to claim 1, it is characterized in that: a described vegetables and fruits bagging only side is opening-like.

4. fresh-keeping bagging of vegetables and fruits that contains the counteracting ethylene response in plants composition, it is characterized in that: it is formed by plastic sheeting and at least one side tool opening, wherein the nonwoven layer compound be adhered to described plastic sheeting hollow bagging to small part inner layer sheet face, and wherein said nonwoven layer compound comprises one deck thermoplastic compounds and layer of non-woven fabric at least at least.

5. the fresh-keeping bagging of vegetables and fruits that contains the counteracting ethylene response in plants composition according to claim 4, it is characterized in that: the internal layer surface of described vegetables and fruits bagging is all coated by the nonwoven layer compound.

6. according to claim 4 or the 5 described fresh-keeping baggings of vegetables and fruits that contain the counteracting ethylene response in plants composition, it is characterized in that: the two ends up and down of described vegetables and fruits bagging are all opening-like.

7. according to claim 4 or the 5 described fresh-keeping baggings of vegetables and fruits that contain the counteracting ethylene response in plants composition, it is characterized in that: a described vegetables and fruits bagging only side is opening-like.

Images