WO2004028241A1

WO2004028241A1 - Farm product protecting bag

Info

Publication number: WO2004028241A1
Application number: PCT/JP2003/004525
Authority: WO
Inventors: Ohki Yamada
Original assignee: Nidaiki Co., Ltd.
Priority date: 2002-09-26
Filing date: 2003-04-09
Publication date: 2004-04-08
Also published as: KR20040062951A; AU2003242294A1; CN100558229C; JP4237141B2; JPWO2004028241A1; HK1081396A1; CN1700856A; KR100646211B1

Abstract

A farm product protecting bag adapted to be placed over a farm product, such as fruit, vegetable or flower, to protect it from diseases or harmful insects, wherein the bag contributes to improvement of quality, such as sugar content, color or external appearance of the farm product, the bag mounting efficiency being increased to facilitate quality control. The bag is in the form of a transparent or semitransparent and/or light-transmitting porous film of plastic material with at least part or all of the surface of the bag being air-permeable or gas-permeable and having many fine pores impermeable to water, the bag comprising a bag main body having an opening that opens in one direction, and an attaching section for attaching the bag main body to the support portion of the farm product, it being preferable that the diameter of the largest of the fine pores be in the range of 50 - 500 μm and that the void area percentage be in the range of 0.7 - 10%, the fine holes being through-holes or closed holes closed at one end, it being preferable that the surface formed with irregularities in the peripheral edges of the fine holes be directed to at least the inside of the bag.

Description

Product Description Bag for Agricultural Products Protection

The present invention relates to a bag which covers agricultural products and protects them from diseases and pests during cultivation of fruits such as persimmons and pears, vegetables and flowers, and more specifically, a product made of hot air by a film made of air-permeable or gas-permeable plastic. The present invention relates to a protective bag for agricultural products that can prevent burns and enhance the workability of bag installation to facilitate quality control and contribute to the improvement of quality such as sugar content, color and appearance of agricultural products. Background art

Traditionally, paper bags have been used to protect fruits during cultivation of agricultural products, such as persimmons, pears, apples, peaches and other fruits. However, the paper bag has a water-repellent finish such as coating with paraffin or alpha-olefin resin so that it does not break in water, so that the bag loses gas permeability. Not only does it stop the contact with the bacteria and cause bacteria to multiply, but especially in the hot summer months, the hot air stays inside the bag, and the part of the fruit comes in contact with the upper part of the bag by this heat. There was a problem that burning occurred.

In addition, when thinning the fruit while observing the state of the fruit inside the bag during the fruit growth process, the paper bag described above lacks transparency, and the bag is used to observe the fruit inside the bag. It takes time and effort to break down. Therefore, there is a bag in which a part of paper bag is made of transparent film, but it is inconvenient such as wearing transparent part facing in the same direction so that the manufacturing cost is high and the inside of the bag can be observed from one direction. It has not reached widespread use. Also, Since paper bags made of paper are easily torn when the birds bite and eaten the fruits, the upper part of the bag must be covered with an umbrella-like plastic film to protect the fruits from bird damage, Was a problem.

In addition, agricultural products other than the fruits described above, for example, vegetables such as tomato, mini tomato, cabbage, Chinese cabbage, asparagus, etc., other edible mushrooms, quince such as maiko, flower buds of persimmon, phalaenopsis etc. Agricultural products such as species have become a problem due to multiple damage caused by eating pollen, leaves, flowers, fruits or shoots to small pests called pests (T hrips) during the growing process.

On the other hand, as a substitute for the above-mentioned paper bag, there is a bag body in which an air hole is provided in a transparent or semi-transparent plastic film (Japanese Patent Application Laid-Open No. 10-520210) Page 14 (Fig. 3))). A light shielding portion is provided on the side of the opening of the bag according to the present invention, and a water flow port (referred to as a water flow hole in the above publication) is provided on the bottom of the bag, which differs from the present invention. According to the invention described in the above-mentioned publication, there is a possibility that water can permeate from the outside if the size of the hole diameter of the vent exceeds a predetermined range, so that the water entering the inside is discharged. It is considered that a water outlet is provided at the bottom of the bag. However, pests such as ants, oil insects, and the above-mentioned slips may enter from the water passage, which is a problem. Disclosure of the invention

In order to solve the above-mentioned problems, the present inventors diligently studied and reached the present invention. That is, the micropores provided in the bag body are air-permeable or gas-permeable, and have a size that water does not pass through. Therefore, since water does not enter into the interior of the bag as long as the opening is sealed, there is no need to provide a draining hole, and thus there is a concern that pests may penetrate into the bag through the draining hole. There is no Also, in order to allow air to pass through the pores and replace the air inside the bag with the outside air, it was found that there is a close relationship with the density and size of the pores. A range of pore size and pore area ratio or open area ratio was established to create the most suitable environmental conditions for agricultural products. The present invention solves the above-mentioned problems. Especially, in agricultural chemicals-less cultivation or reduced agricultural chemicals cultivation, the growing and protecting effect of agricultural products is remarkable, and the agricultural products which contribute to the improvement of fruit quality, yield and workability. The purpose is to provide a protective bag.

Means to solve the problem

In order to solve the above problems, the present invention relates to a bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, and the bag comprises at least one bag. It has an opening, and at least a part of the bag (including the part on the opening side) to the entire surface of the bag is provided with a large number of breathable to gas-permeable and water-impermeable micropores, transparent to semitransparent, or An agricultural product protection bag is characterized in that it comprises a perforated film made of Z and a light transmitting plastic (Claim 1).

Furthermore, in the present invention, “air-permeable or gas-permeable and non-permeable micropores” means “at least air can be transmitted when the agricultural product protection bag is used in a generally normal state, but water is It means a non-permeable micropore, and even if water enters under special conditions other than the above, it is not intended to exclude from the present invention a bag for protecting agricultural products according to the reason.

Further, in order to solve the above problems, the present invention is a bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, and the bag is at least one. And at least part of the bag (including the part on the side of the opening) to the entire surface of the bag are provided with a large number of gas-permeable and non-water-permeable micropores, and the transparent A bag body made of a translucent or light-transmissive plastic apertured film; and an attachment portion for attaching the above-mentioned bag body to a support portion (including a support branch portion) of the agricultural product. It is set as the agricultural product protection bag characterized by the above (Claim 2). Further, in order to solve the above problems, the present invention is a bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, and the bag is at least one. The multi-bag is made of plastic film and has at least one part of the bag (including the part on the side of the opening) to the entire bag surface. It is characterized in that it is characterized in that it comprises fine pores of air-permeability to gas-permeability and non-permeability.

Further, in order to solve the above problems, the present invention is a bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, and the bag is at least one. The multi-bag is made of plastic film and has at least one part of the bag (including the part on the side of the opening) to the entire bag surface. A bag body comprising air-permeable or gas-permeable and non-water-permeable micropores, and an attachment portion for attaching the bag body to a support portion (including a support branch portion) of the agricultural product; The product protection bag is characterized in that

Four ) .

In addition, in order to solve the above-mentioned problems, according to the present invention, the micropores provided in the plastic film have a maximum pore diameter in the range of 50 to 500 jum and a pore area 5. The agricultural product protection bag according to any one of claims 1 to 4, wherein the rate is in the range of 0.7 to 10% (claim 5).

Further, in order to solve the above-mentioned problems, according to the present invention, in the plastic filling rod having the micropores according to claims 1 to 4, convex parts are formed on the periphery of the micropores on one side or both sides, It is preferable that the product protection bag is characterized in that any surface formed with the convex portion is directed toward the inside of the bag body. Further, in order to solve the above-mentioned problems, according to the present invention, the fine holes may be through holes which are penetrated from one surface to the other surface of the plastic film, or an extremely thin film portion near the surface of the other surface. The agricultural product protection bag according to any one of claims 1 to 4, characterized in that it is a closed hole which is perforated in the thickness direction except for and closed at one end by the above-mentioned ultra thin film portion. It is preferable to do (claim 7).

In addition, in order to solve the above-mentioned problems, the present invention is characterized in that the plastic film constituting the agricultural product protective bag is selected from light of wavelength which promotes coloring of agricultural products, sugar content or growth in sunlight. It is preferable to use the bag for agricultural product protection according to any one of claims 1 to 4, characterized in that it is transparent to (1) or (2).

Further, in order to solve the above problems, according to the present invention, the plastic film constituting the bag is a biodegradable film, an ultraviolet absorbing film, an antibacterial or sterilizing film, a negative ion generating film, a far infrared ray generation 5. The agricultural product protection bag according to any one of claims 1 to 4, characterized in that it comprises at least one functional film selected from a film and a deodorant or aromatic film. Section 9).

Furthermore, in order to solve the above-mentioned problems, the present invention provides the agricultural product protection bag according to any one of claims 2 or 4, wherein the attachment portion is formed of a part of the bag main body or the bag main body. It is preferable that the product protection bag is characterized in that the attachment portion configured separately is fixed to the bag body.

The agricultural product protection bag according to the present invention is made of the plastic film having fine pores as described above, and it is not broken against itching due to bird's beak, and ant, oil bug, slug, moth and slips Completely prevent the infestation of insects and other insects. In addition, it is impermeable and prevents rainwater and liquid pesticides from entering the bag Therefore, there is no need to provide a drain for drainage, and therefore there is no concern that pests will enter from the drain. Even if rainwater enters the bag under strong wind such as a typhoon, the fine holes are breathable, so the rainwater in the bag is vaporized and evaporates from the fine holes. And, since the air inside the bag and the air inside the bag are freely exchanged through the fine holes, the hot air inside the bag is eliminated during the day to equalize the temperature distribution in the bag and to prevent the burning of the fruit, and at night the outside of the bag The cold air is introduced into the bag to bring the condition inside the bag closer to the natural atmosphere. In this way, the difference between the day and night temperature in the bag is increased, and the sugar content of the fruit is increased to improve the quality. Furthermore, since the bag body is transparent to light, by taking in sunlight in a natural state, the degree of coloration of agricultural products is increased to give an appearance with excellent colorability as with cultivation under sunlight.

Further, in the multi-bag for agricultural product protection according to the present invention, in particular, the one constituted by the double bag, a transparent or semi-transparent bag in which the inner bag transmits sunlight or selectively transmits only sunlight of a specific wavelength. In the case of an apple protective bag, the outer bag of the double bag is made of a light shielding film for blocking sunlight or partially blocking sunlight. In the early stage of fruit development, the former double bag is attached to the fruit in the early growth stage of the fruit to keep sunlight blocked, and when the fruit has grown to a certain degree, leave the inner bag and remove the outer bag. The sunlight transmitted through the bag can be applied to the fruit to make it red. Further, it is preferable to add a transparent organic red pigment to the inner bag in order to make it easy to transmit light of red wavelength so as to increase the red pigment of the fruit. Alternatively, a double bag may be placed during the growing season of the produce, and after harvesting the produce, the outer bag may be removed and the inner bag may be used as a product packaging bag. Depending on the situation, three or more multiple bags may be configured. In the agricultural product protection bag according to the present invention, since the pore diameter of the largest part of the micropores can be set in the range of 50 to 500 m, air permeability or gas permeation can be achieved. Even small tiny pests like sexual and impermeable and slips (T hrips) can prevent entry. Furthermore, in consideration of the case where the pore size is smaller than necessary and the air permeability is insufficient only by determining the maximum value of the pore size of the micropores and the minimum value of the pore area ratio, a sufficient air permeability is secured. In order to achieve this, the range of the pore size of the largest part of the micropores was determined as described above, and the area fraction of pores was determined within the range of 0.7% to 10%. Here, the vacancy area ratio means a numerical value expressed as a percentage of the total vacancy area per unit area.

Further, in the agricultural product protection bag according to the present invention, a convex portion is formed on the periphery of the micropores on one side or both sides of the film, and any side of the convex surface can be formed inside the bag body. The above-mentioned convex portions make point contact with the surface of fruit etc. (FIG. 5). In the case of a conventional simple efficacious film without projections, the film adheres tightly to the surface of fruits and the like, so that the passage of air is blocked. This is a cause of scorching by hot air. A light shield was provided to prevent this heat burn, but there was a defect that the colorability and sugar content decreased by blocking the sunlight. In the case of the present invention, the air flow passes from the fine holes through the gap between the convex portion and the contact portion such as a fruit and the like, and the heat is discharged to the outside to thereby prevent the heat burning, thereby preventing the light shielding portion. It does not need to be added, so it acts to increase coloring and sugar content. Furthermore, in the inner surface of the bag body, the convex surfaces of the opposing films or the convex surface and the flat surface are in contact, and compared with those in which the flat surfaces are in contact, stickiness of the film is prevented and the bag opening operation is facilitated. Act as

Moreover, a convex part is formed in the periphery of the minute hole in one side or both sides of a film, and the bag constituted so that the film side in which the convex part was formed was turned to the inside of the bag main body The gap between the convex part and the contact part such as fruit prevents so-called water transfer caused by the capillary phenomenon in which water droplets such as rainwater enter the inside of the bag through the fine holes, thereby making the film non-permeable property more improves. Both Since the air flow from the fine holes is also increased, the action of releasing the hot air to the outside is further improved.

In addition, the agricultural product protection bag according to the present invention can be a perforated film comprising a closed hole, and it is possible to transmit air through the closed very thin film part at one end of the minute hole, or pest Entry may, of course, also block the entry of pathogens.

Further, the agricultural product protection bag according to the present invention can be added with an additive such as a coloring material or an ultraviolet light absorber which selectively transmits the wavelength of the sunlight which promotes coloring of fruits and the like, for example, black By adding a transparent organic coloring material that propagates a purple pigment, it is possible to make the color darker and to increase the sugar content.

In addition, the agricultural product protective bag according to the present invention can promote the growth of agricultural products and further enhance the value by using various functional films as described above.

In addition, the agricultural product protection bag according to the present invention includes an attachment portion for attaching the bag to the support portion of the adherend, and the attachment portion is formed of a part of the bag body or Since the attachment part configured separately from the bag body can be fixed to the bag body, the work of attaching the bag is facilitated. By thus fixing the attachment portion to the bag or configuring it as a part of the bag, it is possible to save the trouble of removing the attachment portion one by one, and it becomes easy to attach the bag and support the bag. It can be attached firmly to the department. Specific examples of the attachment unit will be described later. Brief description of the drawings

FIG. 1 is a perspective view showing an example of an agricultural product protection bag according to an embodiment in which an adhesive is used in the attachment portion.

Fig. 2 shows a bag for protecting agricultural products according to an embodiment in which an adhesive is used in the attachment portion. It is the perspective view which showed the state used.

FIG. 3 is a perspective view illustrating the agricultural product protection bag according to the embodiment in which a wire is used for the attachment portion.

FIG. 4 is a perspective view showing a state of using the agricultural product protection bag according to the embodiment in which a wire is used for the attachment portion.

FIG. 5 is an explanatory view showing the state of the contact surface between the agricultural product protection bag and the fruit according to the example.

FIG. 6 is a perspective view illustrating a product protection bag according to another embodiment in which a wire is used for the attachment portion.

FIG. 7 is a plan view illustrating the agricultural product protection bag according to the embodiment in which both end portions of the belt-shaped attachment portion are welded to both side surfaces of the bag body.

FIG. 8 is a perspective view illustrating the agricultural product protection bag according to the embodiment in which a part of the bag body is cut into a band-like attachment portion.

FIG. 9 is a plan view illustrating a mounting portion made of small pieces and a state in which this mounting portion is welded near the opening of the bag body. Embodiment of the Invention

Hereinafter, representative embodiments of the present invention will be described based on the drawings. However, the present invention is not limited by the embodiments.

Example

In the embodiment shown in FIGS. 1 to 4, 1 is a bag for agricultural product protection, 1 1 is a bag body, 12 is an attachment portion, 13 is a fine hole, and 14 is a cut. is there. The bag body 1 1 is made of a transparent or translucent plastic perforated film, and a large number of air-permeable to gas-permeable and non-water-permeable micropores 13 are formed on almost the entire surface. Although micro holes are provided in a part of the opening 15 side in the above-mentioned figure, the micro holes 13 may be provided on the entire surface of the bag. And the range in which the fine holes are provided can be determined appropriately in consideration of the temperature inside the bag. The hot air in the bag tends to rise upward, and in order to expel the hot air to the outside, the bag is usually attached to the upper part of the bag when the bag is mounted with the opening 15 facing upward. To make it easy for air to escape, provide micropores 13 at least near the opening 15 of the bag, or increase the pore size, pore density or area fraction of pores to increase the ventilation efficiency. It is preferable to arrange as follows. That is, depending on the direction in which the bag is attached, for example, the vicinity of the opening of the bag, the vicinity of the bottom of the bag, or the middle of the bag, etc. The pore diameter, pore density, pore area ratio, etc. can be changed as appropriate.

The material of the plastic film is not particularly limited. For example, polypropylene (PP) film, biaxially oriented polypropylene (OPP) film, polyethylene (PE) film, polystyrene for general use (GP-PS) film, resistance to High Impact Polystyrene (HI — PS) Film, Biaxially Oriented Polystyrene (OPS) Film, Polyester (PET) Film, Polycarbonate (PC) Film, Polyvinyl Alcohol (PVA) Film, Polyvinyl Chloride (PVC) Film, Io It can be selected from nomer film, cellulose plastic film, thermoplastic elastomer film, etc. according to the purpose of use. Furthermore, in addition to the single film, a multilayer film laminated by lamination or sand lamination through a resin layer for coextrusion film or adhesive may be used.

In addition, it can be a film that is degraded by microorganisms, for example, starch or dextran, or other biodegradable resin as the main raw material, and UV absorbers that absorb specific UV radiation, such as metal powders such as silver and copper. Antibacterial agent W

11) Add or apply at least one selected from disinfectant, ceramic powder that generates negative ion to far infrared, granite powder to carbon powder (eg charcoal etc.) and deodorant or fragrance By filling in the bag, various functions as described above can be achieved.

While the gas permeability can be secured if the diameter of the largest part of the micropores is 50 / m, preferably 70 m or more, water permeability may occur if it exceeds 500 m. The pore size of the micropores is preferably in the range of 50 to 500 jm, preferably 70 to 400, and particularly preferably 90 to 200 m. In this example, experiments were conducted on three types of effective films made of the 25 μm thick transparent OP film described in Table 1.

Table 1 Example 1 Example 2 Hole shape Circle shape Circle shape Circle shape Number of holes (m ² ) 1, 786, 000 890, 000 620, 000 Average pore diameter (im) 1 0 0 200 300 350 450 hole area ratio (%) 1. 4. 4 7 8. 8

As a method of producing an effective film, for example, between an embossing roll and a backup roll provided with a drive roll or a projection having a hot needle heated to a melting point (about 200 ° C.) or more of a polyolefin-based plastic film. Hold it in a predetermined gap (set at a predetermined gap) and melt-perforate a large number of fine holes while adjusting the line speed. At the time of the melting and perforating, a relatively high convex portion is formed by the molten resin reservoir around the hole on one surface of the film, and a relatively low convex portion is formed on the opposite surface side. This comparison in the present embodiment The two films are stacked so that the surface on which the high convex portion is formed is on the inside of the bag, and welding cutting (fusion cutting) around the periphery excluding the opening forms the bag. The above-mentioned multi-layer bag is twice as many as the number of films to be polymerized, for example, the above-mentioned double bag for apple is made of two transparent perforated films, and one light-shielding perforated film on the outside of each. A total of four sheets can be stacked, and the periphery can be fused in the same manner as described above to form a bag. In addition to the single film as described above, the perforated film is formed by overlapping a plurality of films and perforating them with a heating needle or the like, and the periphery of the through holes are fused to form a plurality of films point to each other. Also included are bonded films bonded to The latter polymer films can be easily peeled off to each single film by simply pulling each film by hand.

In addition to the use of the above-described heat needle, the perforation method is a perforation method in which the fine powder ore is blown at high speed from any one surface of the plastic film to the other surface, a method of perforation by laser one light, a large number of through holes The film is continuously put along the surface of the cylindrical roll having the film, and the film is heated and suctioned from the inside, and the film section sucked along the inner surface of the cylindrical roll is cut and perforated. A method of injecting a heating gas or the like from the inside of the through hole provided in the cylindrical roll and forming a hole, continuously putting a film on the surface of the cylindrical roll provided with a large number of depressions, the surface of the film There is a method such as heating by a gas burner flame, etc. and perforating the film in contact with the above-mentioned depressed portion by receiving internal stress and shrinking, and the perforated film of the present invention can be formed by any perforation method. Manufacturing It is intended to encompass the film, not intended to be any limitation by drilling method and bag-making method.

Also, a film having a closed hole in which one end is closed by an extremely thin film portion is manufactured in substantially the same manner as the invention of Japanese Patent Application No. 2002-0220272 filed by the present applicant. can do. For example, a polyethylene layer, a heat-sealable sheet, with a relatively gas-permeable polystyrene layer on the outside Using the lamination film by dry lamination or PE lamination with resin layer for adhesion in the order of the polyester layer (the thickness of each layer is 50, 25 and 25 m in order) Hold the inner (polyester layer) side of the film against the hot needle between the drive roll and the backup roll on which the hot needle is planted (set to the predetermined gap), and adjust the line speed to the outside of the film. (Polystyrene layer) Innumerable micropores can be melt-perforated leaving an extremely thin film portion of about 5 μm in the vicinity of the surface.

The temperature of the heating needle is set to a temperature higher than the melting point of the film (about 200 ° C.), but it is preferable to control the temperature appropriately in relation to the liner speed. The so-called hot needle roll is formed by planting a needle on almost the entire surface of the roll in contact with the film and heating it with a heater. In addition to this, it is possible to use a so-called protrusion strung roll having innumerable protrusions formed on the surface of the roll. it can. In this way, it is clear that about 0.4 mm in diameter and about 0.7 mm in diameter, which are occluded by an extra thin film of about 5 μm near the outer film surface, are interspersed with innumerable micropores perforated at intervals of about 0.7 mm. A gas permeable film can be obtained. The film thickness of the extremely thin film part is determined by the inter-roll gap, the film processing speed, and the correlation between the film melting point and the etching temperature, and in practice the film processing speed is finely changed by changing the film processing speed.

The attachment 12 near the opening of the bag body 1 1 causes one of the openings 15 to protrude longer than the other, as shown in FIG. An adhesive layer 17 and a release layer 18 are formed in this order on the inside of the projecting portion 16 while providing a notch 14 toward the end. To attach the bag body 1 1 to a support branch such as fruit, as shown in Fig. 2, open the opening of the bag body 1 1 and take in the fruit inside, place the bag body 1 1 on the fruit, and then Release the release layer 18 and cross the left and right protrusions 16 around the support branch Then, the adhesive layer 17 is attached to the opposite film surface to seal the opening. The adhesive layer 17 and the release layer 18 may be provided on the opposite surface side where the protrusion 16 is bent.

FIG. 3 exemplifies the case where the wire 19 which is the attachment portion is attached in the vicinity of the opening of the bag body 1 1. Cut 14 may be provided if necessary. As shown in FIG. 4, the wire 19 can be wound around the support branch and fastened. The wire 19 is preferably one coated with plastic or one in which the wire is held between two plastic strips. FIG. 6 exemplifies the case where the entire wire 19 is heat-welded longitudinally to one side of the bag body, and a band-like cut is formed along the wire 19; The heat pressing portion 24 may be formed at the lower end of the plug. Alternatively, the wire 19 may be provided along the entire periphery or a part of the opening 15 of the bag body 11 (not shown).

Fig. 7 shows that the attachment part is configured in a band-like shape separately from the bag body, and this band-like attachment part 12 is disposed in the lateral direction near the opening of the bag body 1 1 Both ends are heat welded to both sides of the bag body 1 1. Only one end of the strap-like attachment 12 may be welded. The material of the above-mentioned strap-like attachment 12 is not particularly limited, but it is possible to heat-weld with the bag body 1 1 and at least a non-stretched film in the longitudinal direction of the strap-like attachment. preferable. The opening of the bag body 1 1 is removed by layering the two perforated plastic films and the strip-like plastic film that make up the bag body 1 1 in this order at appropriate positions, and cutting off the bag body 1 1. It is possible to form the agricultural product protection bag 1 whose periphery is sealed and whose one end or both ends of the attachment portion 12 are welded to the bag body 1 1 in one step.

In order to attach the above-mentioned bag to a support branch of produce, etc., the end of the strap-like attachment 12 is removed from the bag body 1 1, or only one end is welded. As it is, it is tightened by winding it around the opening 15 of the bag body 1 1 several times, sandwiching the end with a gap and stretching it, and attach the bag body 1 1 to the support branch and seal the opening 15 Can. In addition to pressing the plastic film with a heated cutting blade, a high-frequency welder may be used for the vinyl chloride resin film or the like, and an ultrasonic welder may be used for the polyolefin-based resin film.

The attachment portion 12 shown in FIG. 8 is an example in which one side of the bag body 1 1 itself is cut away 14 leaving a heat-pressed portion 24 at the upper end portion to form a band-like string 12. This cutting insert 14 may be formed using a scissors or a cutter, but the heat pressing part 24 at the upper end is heat-sealed by a cutting blade with a flat blade, and processing is performed in one step You can also As in the previous example, depending on the material, high frequency or ultrasonic welders may be used. Alternatively, a fabric such as a band-like non-woven fabric may be attached to the inner peripheral portion of the opening 15 to improve the water tightness when the opening is closed (not shown).

FIG. 9 shows another example of the attachment portion 12. In the middle portion of a small piece made of a hard plastic thin plate having flexibility, a hole 25 for holding the bag body, and this holding It illustrates a state in which the attachment portion 12 in which the cut 14 continuous to the hole is formed is welded in the vicinity of the opening 15. By squeezing the opening 15 of the bag main body 1 1 and pushing it from the cut 14 into the holding hole 25, the bag main body 1 1 can be attached to the support in a state where the opening is closed.

Experimental example

As a bag for agricultural product protection using the three types of effective films obtained in the above-mentioned examples and a comparative example, a paper bag with a conventional water repellent finish provided with a water passage at the bottom is used. The results of experiments where 30 to 500 sheets of each were prepared and mounted on a ridge (Kyoho) under the same conditions are shown below. The experiment will be conducted at Gion in Yamanashi and Shiga Prefectures, and bags will be prepared from May to June 2014. The experiment was started from the end of the month to the middle of July, and while continuing the observation inside the bag, the grapes were harvested from the beginning to the end of September and 20 persons surveyed their sugar content and appearance etc. Shows the experimental results.

Table 2 Example 1 Example 2 Comparative Example Sugar content Very sweet Very sweet Very sweet Slightly sweet Saturation Dark black purple Dark black purple Dark black purple Red purple Occurrence of burnt None at all None at all Partial burnt Extent of pest damage Not at all Not at all Not at all Slightly visible Observation workability Very good Very good Very good Very difficult to see

As shown in Table 2 above, the agricultural product protection bag of the example achieved excellent results in any of the sugar content, the coloration degree, the occurrence of burning and the degree of pest damage, while In the case of paper bags, they were slightly inferior in terms of sugar content and coloration. In the example, no burning of the firewood occurs and no discoloration of the bag. In contrast to the case where the bag can be used as a packaging bag for goods as it is, in the case of the comparative example, a portion in contact with the inner surface of the upper bag The occurrence of heat-burning was not noticeable. The inside of the paper bag was subjected to a mechanical crack and turned to red brick, which was not ready for use as a product packaging bag. In addition, the degree of nutrient transmission from the stem is almost the same in both the example and the comparative example, and the coloring of the fruit becomes darker as the light irradiation degree becomes higher, the color becomes darker, the sugar content becomes higher, and the surface is white. It was confirmed that the powder would blow.

In terms of visual observation of the inside of the bag, in the case of the comparative example, it is necessary to break all the bags. The state of the fruit of the department is not known, and the bag has to be re-hooked, which takes less time, but in the case of the example, the state of the fruit inside is obvious at a glance, and the thinning operation etc. It is extremely efficient and efficient because you can select and operate only the necessary items. In addition, the efficiency of work is not good because the paper bag with a window made of transparent film can not be observed from the outside. No damage caused by birds was observed in this example. On the other hand, in the case of the comparative example, it was possible to see the traces of the bag that were sunk from the top of the bag.

Based on the above results, it has been confirmed that the present invention is sufficiently applicable to agricultural products such as fruits, vegetables and flowers other than mulberry.

Effect of the invention

The agricultural product protection bag according to the present invention can completely prevent the infestation of pests into the bag and can prevent bird damage which birds bear on agricultural products. In addition, by exchanging external air and air inside the bag through fine holes, it prevents the heat burning of agricultural products, prevents the growth of mold and pathogens, improves the quality and reduces defective products. Therefore, since it is not necessary to provide a light shielding portion for preventing heat burning of agricultural products, it is possible to enhance the sunlight intensity, sugar content and coloring property. Installation of the bag is easy, and it is possible to observe the growing condition of the agricultural product from the outside with the bag attached and to select the harvest time, and the harvested agricultural product is not replaced with the packaging bag but it is not changed. Can be shipped in state. Furthermore, since it is possible to perform the thinning operation etc. by selecting only the necessary items from the outside, it is not a fool to improve the working efficiency, it saves the time and effort to break the bag and check it. In addition to being able to reduce, processing of the bag is also relatively easy, and it is economical and versatile.

Claims

The scope of the claims

1. A bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, wherein the bags are:

Have at least one opening and

At least a part of the bag (including the part on the opening side) or the entire bag surface is provided with a large number of air-permeable to gas-permeable and non-permeable micropores,

Consisting of a transparent to translucent or light transmitting plastic perforated film

Produce protection bag characterized by

2. A bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, wherein the bags are:

Have at least one opening and

A bag body made of a transparent to translucent or / and light transmitting plastic perforated film;

An attachment for attaching the bag body to the support (including the support branch) of the agricultural product;

Produce protection bag characterized by having.

3. A bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, wherein the bags are:

Have at least one opening and

It is composed of multiple bags made of plastic film, and any of the multiple bags is at least a part of the bag (including the part on the opening side). Equipped with fine pores Product protection bag characterized by becoming.

4. A bag for covering and protecting the agricultural products in the process of cultivating agricultural products such as fruits, vegetables and flowers, wherein the bags are:

Have at least one opening and

It is composed of multiple bags made of plastic film, and any of the multiple bags is at least a part of the bag (including the part on the opening side). A bag body comprising fine pores of

Produce protection bag characterized by having.

The micropores provided in the plastic film have a maximum pore diameter in the range of 50 to 500 jU m and a pore area ratio in the range of 0 to 10%. An agricultural product protection bag according to any one of claims 1 to 4, characterized in that.

6. The plastic film having micropores according to any one of claims 1 to 4, wherein a convex portion is formed on the periphery of the micropore on one side or both sides, and any one of the convex portions is formed into a bag An agricultural product protection bag characterized in that it is configured to be directed to the inside of the main body.

7. The fine holes are perforated in the thickness direction except through holes which are made to penetrate from one surface to the other surface of the plastic film, or an extremely thin film portion in the vicinity of the other surface, and one end is made by the extremely thin film portion. The closure bag according to any one of claims 1 to 4, wherein the closure hole is a closed hole.

8. The plastic film that makes up the agricultural product protection bag can be selected from light of the wavelength that promotes the coloration, sugar content or growth of agricultural products in sunlight. The agricultural product protection according to any one of claims 1 to 4, which is transparent.

9. The plastic film constituting the bag is selected from biodegradable films, UV-absorbing films, antibacterial or sterilizing films, negative ion generating films, far-infrared generating films and deodorizing or aromatic films. The agricultural product protection bag according to any one of claims 1 to 4, characterized in that it comprises at least one functional film.

10. In the agricultural product protection bag according to claim 2 or 4, the attachment portion is constituted by a part of the bag body or the attachment portion formed separately from the bag body is fixed to the bag body. An agricultural product protection bag characterized by