JP2003047386A - Insecticidal bag and insecticidal method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bactericidal bag excellent in airtightness, suitable for bactericidal treatment using an inert gas, allowing to arbitrary select a substance to be bactericidally treated and filled in the inside of the bag and allowing easily to take the substance out of and put the substance in the bag owing to its light weight and provide a bactericidal method excellent in bactericidal effects and having ensured safety. SOLUTION: This bactericidal bag 10 has a resin-made fastener 14 having a versatile shape similar to that used for clothing capable of keeping airtightness in a closed state and adhered to the bag body 12 in a state to keep airtightness. In addition, the bag 10 has a gas inlet port 16 having a stopcock for introducing the inert gas to the bag body 12. The bag body 12 is formed with a laminated sheet having a polyolefin-based resin layer and a gas barrier layer and containing no chlorine-based resin layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insecticidal bag that can be suitably applied to cultural properties and foods, and more specifically, it does not use toxic gas as an insecticide and does not deteriorate the treated articles. The present invention relates to a bag and an insecticidal method using the bag.

[0002]

2. Description of the Related Art In order to protect cultural properties, cereals and the like from damage by pests, toxic gas (methyl bromide, phosphine, etc.) generally used in the field of agrochemicals is used for insecticidal treatment. These toxic gases are also used for tent fumigation, etc. using film sheets, but even if a tent that is airtight is used because it is a toxic gas, it is necessary to consider the safety of gas leakage and exhaust treatment etc. Was limited. For example, when sterilizing foods such as grains, the use of chemicals such as toxic gases and pesticides raises concerns about residual toxicity. In addition, valuable cultural properties cannot be altered by chemicals or chemical substances, or damaged by the fading of pigments.
Both of them are non-toxic themselves, and carbon dioxide gas, nitrogen gas, or a chemically inert gas material represented by a rare gas such as helium or argon (hereinafter, appropriately,
It has long been desired to kill insects by using an inert gas). Insect killing by an inert gas is described in, for example, Japanese Patent Laid-Open No. 9-
As described in No. 163927, a method of storing grains filled with carbon dioxide by using a double-structured bag body has been proposed, but such a bag body is a flexible bag body. Since the shape retention property of pesticide was poor and the opening was small, the insecticidal substance to be filled in the bag was limited.

Japanese Utility Model Laid-Open No. 2-79944 discloses a bag for disinfecting silkworms, which is provided with a flexible sheet such as polyester tarpaulin coated with vinyl chloride resin and a fastener capable of maintaining airtightness in a closed state. Has been
This is based on the use of toxic gases such as ethylene oxide, and although the airtightness is relatively good, for example, long-term high airtightness required when performing insecticidal with an inert gas. Has not reached the level at which
Furthermore, since a chlorine-based resin represented by vinyl chloride resin is used as a main material, it is heavy, and since it contains chlorine, there is an environmental problem at the time of disposal.

[0004]

The present invention has been made in consideration of the above problems, and an object of the present invention is excellent in airtightness and suitable for insecticidal treatment using carbon dioxide gas or inert gas, It is an object of the present invention to provide an insecticidal bag in which an insecticide-treated product to be filled inside can be arbitrarily selected, is light in weight, has a small impact on the environment even when it is discarded, and can be easily taken in and out. Also,
Another object of the present invention is to provide an insecticidal method having a high safety and an excellent insecticidal effect, which has no fear of exerting an adverse effect on an insecticide-treated product.

[0005]

[Means for Solving the Problems] As a result of earnest studies to solve the above problems, a polyolefin-based high gas barrier sheet is used for a bag body, and an airtight fastener is hermetically joined to perform an insecticidal treatment with an inert gas. The present invention has been completed by finding out that it becomes possible. That is, the insecticidal bag of the present invention is provided with a fastener capable of maintaining airtightness in a closed state and a gas inlet capable of being closed, and the bag body has a polyolefin resin layer and a gas barrier layer, and a chlorine resin layer. It is characterized in that it is formed of a laminated sheet not containing.

The airtightness of the insecticidal bag is such that when a carbon dioxide gas having a concentration of 70% or more is filled, a carbon dioxide gas concentration of 50% or more can be maintained for 7 days or more, or an oxygen concentration of 0.
Replace the gas in the insect bag with 3% or less of inert gas,
When the oxygen concentration is 0.3% or less, it is preferable that the oxygen concentration of 1% or less can be maintained for 21 days or more. Further, as a constitution, the laminated sheet has a stretched cross layer made of a polyolefin resin, and the fastener can be thermally adhered to at least a resin layer and a laminated sheet material capable of being heat-bonded to a material constituting the fastener. It is fixed to a laminated sheet forming the bag body via a laminated tape having a resin layer, the fastener and the laminated sheet constituting the bag body are sewn together, and a sealing tape is heat-bonded to the sewn portion. Is a preferred embodiment.

The insecticidal method according to claim 7 of the present invention is to remove harmful insects by accommodating articles in the insecticidal bag of the present invention having the above-mentioned structure, filling them with an inert gas, closing them, and holding them for a predetermined time. Characterized by killing.

Since the insecticidal bag of the present invention uses a fastener capable of maintaining airtightness, articles can be easily taken in and out, and the insecticide-treated article to be filled inside when insecticidal treatment using an inert gas is used. It can be arbitrarily selected. Furthermore, since it is composed of a laminated sheet having this fastener, a polyolefin resin layer, and a gas barrier layer, and can maintain excellent airtightness for a long time, there is no fear of adverse effects on the insecticide-treated material, and an inert gas is generated. The highly safe insecticidal method used was realized.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
FIG. 1 is a perspective view showing an embodiment of the insecticidal bag of the present invention. The insecticidal bag 10 according to the present embodiment includes a bag body 12
In addition, a resin fastener 1 having a general-purpose shape similar to that used for clothing or the like that can maintain airtightness in a closed state
4 is adhered in a state where airtightness can be secured, and further, a gas inlet 16 having a closable cock for introducing an inert gas into the bag body 12 is provided. The bag body 12 has a polyolefin resin layer and a gas barrier layer, and is formed of a laminated sheet that does not include a chlorine resin layer.

As the fastener 14 attached to the bag 12 of the present invention, a fastener that can be opened and closed and can maintain airtightness in the closed state is selected and used. By attaching the fastener to the opening, the contents can be easily accommodated and taken out, and in particular, it can be suitably used for a thing having a predetermined shape such as a cultural property and easily damaged. The material of the fastener is not particularly limited as long as it can ensure airtightness, and known materials such as metal and synthetic resin can be selected. Of these, synthetic resin that is light, slippery, and easy to open and close is preferable. It can be heat-bonded when attached to the bag body, and the entire bag is made of the same type of resin and easy to discard. From the above, a polyolefin resin is more preferable. The shape of the fastener is also arbitrary, for example, it is used for bags and packaging bags, and is a general-purpose tool for poly-chuck composed of a pair of ridges and grooves, clothing for which a large number of engaging elements are arranged on the left and right, etc. And the like, and a fastener (chuck) used for clothing is preferable from the viewpoint of excellent fitting strength and sealing performance. Usually, as such a fastener, one made of vinyl chloride resin (PVC) or polyamide (nylon) resin is commercially available and easily available, but the above-mentioned one made of polyolefin resin is difficult to obtain. . Therefore,
In the case of using a clothing fastener, a PVC fastener is preferable because it is easily available, has excellent physical strength, can impart appropriate flexibility, and is excellent in sealing property.

The bag body 12 of the present invention is provided with a zipper 14 for taking in and out articles and a closable gas inlet 16 for injecting an inert gas such as carbon dioxide. This gas inlet may have any structure as long as it can be closed. For example, a tubular injection port is provided on the bag, and a string, pinch cock,
There are a method of closing by a means such as heat bonding, a method of directly providing a bag with a cock whose opening and closing can be switched by a valve, and a method of providing a tube with a cock whose opening and closing can be switched by a valve. Above all, it is preferable to directly heat-bond the bag to the bag as shown in FIG. 1 for the reasons of easy manufacturing, excellent airtightness, easy gas injection and reinjection, and the like.

The bag body is filled with an inert gas, and the pests are killed due to lack of oxygen or the like for a long period of time.
It is important to have an airtightness to the extent that the inert gas maintains a sufficient concentration. As a guideline for this, when the entire insecticidal bag 10 is filled with carbon dioxide gas having a concentration of 70% or more, it is 50% or more. It is preferable to have airtightness such that the carbon dioxide concentration can be maintained for 7 days or more. Therefore, the sheet used to form the bag body 12 preferably has a carbon dioxide gas permeation amount of 5000 ml / m ² · 24 hr · 1 atm or less. Although the reason will be described later, insecticide may be performed using not only carbon dioxide gas but also other inert gas. For example, when the gas in the insecticidal bag is replaced with an inert gas having an oxygen concentration of 0.3% or less and the oxygen concentration is 0.3% or less, the oxygen concentration of 1% or less can be maintained for 21 days or more. It is preferable to have airtightness. For this reason, the sheet used to form the bag body 12 preferably has an oxygen permeability of 50 ml / m ² · 24 hr · 1 atm or less.

From the viewpoints of strength, flexibility and airtightness, it is preferable to use a laminated sheet in which layers having a plurality of functions are laminated, as a sheet forming the bag body 12, and at least a polyolefin resin layer and a gas barrier layer are used. It is necessary to have The polyolefin-based resin layer is a layer made of a resin obtained by homopolymerizing an olefin-based structural unit such as ethylene or propylene or by copolymerizing it with another structural unit, and polypropylene (PP), polyethylene (PE) , A layer formed of a resin selected from acid-modified resins such as ethylene-propylene copolymer, ethylene-vinyl alcohol copolymer (EVA), and ethylene-methyl methacrylate copolymer (EMMA). The polyolefin-based resin layer may be formed by extrusion laminating these resins, or those obtained by previously molding these resins into a film may be used. To form a laminated sheet containing this polyolefin-based resin layer, a method of melt-extruding these resins on another layer to form a layer, a method of thermocompression-bonding a resin film, a method such as sand laminating or dry laminating. Can be taken. In the laminated sheet, this polyolefin-based resin layer may be exposed on the surface or may be on the inner layer with both sides sandwiched by other layers, and in any case, the effect of the present invention can be obtained. You can

The gas barrier layer is a layer for ensuring the airtightness of the laminated sheet. For example, a polyamide resin, an acrylic resin, a gas barrier resin layer of ethylene-vinyl alcohol copolymer (EVOH) or the like, a metal foil. A metal vapor deposition film, a metal oxide layer, an inorganic vapor deposition film, or the like can be used. EVOH among synthetic resins
(Ethylene-Vinyl Alcohol Copolymer) The resin layer is preferable because it is easy to process, has excellent gas barrier properties, can be made lighter, and does not contain chlorine, so that harmful substances such as dioxins do not occur during incineration. In addition, the metal layer and the metal oxide layer (metal foil, metal vapor deposition film, metal oxide vapor deposition film) and the like are thinner than the gas barrier synthetic resin layer, have a higher airtightness than EVOH, and have a high inert gas barrier property. can get. Aluminum foil is a typical metal foil, and since it has a high carbon dioxide gas barrier property, it is possible to make the main body sheet thin, but the main body sheet easily becomes wrinkled. A typical example of the metal vapor deposition film is an aluminum vapor deposition film, which has a high carbon dioxide gas barrier property, prevents the main body sheet from wrinkling, and is easy to incinerate. The metal oxide vapor-deposited film is obtained by vapor-depositing alumina or silica, has the same advantages as those of metal vapor deposition, and can further make the bag transparent or semitransparent. On the other hand, the adhesive strength between the base material film and the vapor deposition layer is low, and the vapor deposition layer is apt to crack, which may be inconvenient for a large bag.

To form a laminate including a gas barrier layer, a metal such as aluminum is directly attached to the resin layer to be laminated,
A metal oxide such as alumina, an inorganic substance such as silicon is directly vapor-deposited to form a gas barrier layer, or a vapor-deposited film itself obtained by vapor-depositing these inorganic substances as a gas barrier layer is laminated with another resin layer, or The vapor deposition film may be sand laminated or dry laminated.
When a metal foil such as an aluminum foil is used, it is preferable to use another resin layer as an inner layer by extrusion laminating or dry laminating from the viewpoint of preventing the airtightness from being impaired by a pinhole or the like.

The laminated sheet forming the bag body of the present invention can be used as a multi-layered sheet by laminating other layers according to the purpose together with these layers. For example, in order to improve the physical strength, it is also a preferred embodiment to provide the laminated sheet with a polyolefin resin stretched cloth layer. As the stretched cloth layer, it is possible to use a wariff, a non-woven fabric, a flat yarn or a cloth woven from multifilaments, etc., and since it is flexible and has excellent strength, it is preferable to use a stretched cloth woven from flat yarns or multifilaments. preferable.

The layer structure of the laminated sheet such as what kind of layer is used for the laminated sheet, the thickness of each layer and the like can be appropriately selected according to the desired strength, airtightness, etc., but it was used as an insecticidal bag. When not using
The thickness is such that it can be easily folded and is not bulky, that is, about 0.1 to 0.8 mm is preferable for the entire laminated sheet,
About 0.5 mm is more preferable. Also, as the material,
It is preferable to select one that has a high gas barrier property and does not generate a toxic gas even when incinerated.

It is preferable to perform thermal bonding to fix the fastener to the bag body. However, depending on the material of the fastener and the laminated sheet, it may be difficult to bond by direct thermal bonding. In that case, a multilayer tape is interposed between the fastener and the laminated sheet constituting the bag body to perform thermal bonding. Preference is given to using. For example, when a fastener made of PVC is used as the fastener, the multilayer tape can be heat-bonded to a resin (for example, a copolyester composition) capable of being heat-bonded to PVC and a resin used for the surface of the laminated sheet. By using a multilayer tape having at least two layers of resin (for example, ethylene glycidyl methacrylate when the surface of the laminated sheet is a polyolefin-based resin layer), strong and highly airtight adhesion can be achieved. As for the constitution of the laminated tape, the purpose can be achieved if the above two layers are provided, but other layers may be provided.
For example, when a stretched film or the like is laminated as an intermediate layer, the physical strength is improved, and by using an adhesive resin layer or an adhesive layer as the intermediate layer, the adhesiveness of the above two layers can be improved.

As a method for producing a multilayer tape, each resin is formed into a film, and these are adhered and laminated with an adhesive, each film is laminated and thermocompression-bonded, and one of the films is coated on one side. A method of extruding and laminating the other resin, a method of laminating by coextrusion using an apparatus such as inflation or a T-die can be used. From the viewpoint of easy production, it is preferable to produce by a coextrusion method.

As for the fastening of the fastener, as described above, instead of the method of heat bonding directly or through the multilayer tape, the airtight fastener and the laminated sheet are joined by sewing, and the sealing tape is attached to the sewn portion. It is also possible to secure airtightness by welding. The stitching of the fastener and the laminated sheet constituting the bag body can be performed by a known method. Since the sealing tape used for the stitched portion is used for the purpose of preventing the inert gas from leaking from the stitched portion, it is preferably formed of a material that adheres to both the fastener and the main body sheet.

Although an adhesive tape can be used as the sealing tape, a tape that can be heat-bonded to both the fastener and the main body is preferable in terms of excellent durability and ensuring airtightness. In this case, as long as it is strongly heat-bonded to either the main body sheet or the fastener, the heat-sealing strength of the sealing tape may be such that airtightness can be secured. Therefore, as the structure of the sealing tape, a laminated film of a polyolefin resin reinforced with a monolayer film or a biaxially stretched film of a polyolefin resin of the same system as the main body sheet, and further, used as the laminated tape. A similar configuration is preferable.

If the metal or synthetic resin hanging device for suspending the insect bag is fixed to the insecticidal bag of the present invention, the bag containing the contents can be transported, hung and stored, and the appearance of the bag can be adjusted. It is preferable because it can be used. Furthermore, if the suspender is made of a synthetic resin sheet-like material and extends to the body or bottom, the waist of the body is reinforced and the shape retention of the bag is improved. It is suitable. Furthermore, in order to improve the shape retention and the workability of storing and discharging the contents by pulling the bag body on the bag body, a pulling tool similar to the lifting tool may be fixed.

In the insecticidal method of the present invention, the article to be insecticidal treated is put in the insecticidal bag, the fastener is closed, and carbon dioxide gas or an inert gas is injected from the gas injection port that can be closed to close the injection port. Hold for a predetermined time to kill insects.

There is no particular limitation on the articles to be treated for insecticidal treatment, such as foods such as grains, cloth and leather products such as clothes and scarves, art objects such as paintings and sculptures, paper products such as books, and bags. Any article that can be enclosed in the body can be processed. In particular, it can be suitably used for articles such as cultural assets in which wetting and chemical changes due to chemicals pose a problem, and foods for which an insecticide cannot be used from the viewpoint of safety.

Carbon dioxide has various physiological actions on insects such as attracting, feeding, memory retention, respiration, and anesthetic action, and when the concentration is increased to 35% or more, a remarkable lethal action is observed. . On the other hand, a rare gas such as nitrogen gas or argon gas is replaced with oxygen to become a diluting gas that reduces the oxygen concentration to a lethal concentration or less. From the perspective of insecticidal effect,
(1) Depending on the pests to be killed, some of them can live in a state of asphyxia even in a low oxygen concentration state. (2) When enclosing inert gas, it is necessary to replace with almost 100% air. However, it is often difficult to stir the inside of the bag, and it is necessary to flow the inert gas for a long time. (3) Even if the inside is replaced with almost 100% inert gas, It is preferable to use carbon dioxide gas as the insecticidal gas in consideration of the fact that the bag body is required to have a high gas barrier property because the oxygen concentration is increased by the permeation of oxygen and the insecticidal effect is reduced.

When carbon dioxide is used, the time for filling and holding carbon dioxide should be at least 120 hours (5 days) and 167 to 336 hours (7 to 14 days) when the carbon dioxide concentration is 50% or more. When a diluent gas such as nitrogen or a rare gas is used, the time for filling and holding the inert gas is preferably an oxygen concentration of 1% or less, and in that state, at least 336 hours (2 weeks) It is necessary and is preferably maintained for 504 to 672 hours (21 to 28 days). If the air in the bag body is not sufficiently replaced with these inert gases, there is a concern that the amount of residual oxygen in the bag body increases and a sufficient insecticidal effect cannot be obtained. In order to avoid such a situation, it is advisable to provide a closeable gas discharge port in the bag body and inject the inert gas while discharging air from here. This gas discharge port can also be used as a sample collection port for measuring the gas concentration inside the bag when the inert gas is filled and thereafter periodically.

In the insecticidal bag of the present invention, a laminated sheet having a gas barrier layer and a polyolefin resin layer and a fastener having airtightness can be joined together with airtightness to maintain the gas concentration for a long period of time. Moreover, there is also an advantage that a large insecticidal bag can be easily manufactured by reducing the weight of the material.

[0028]

[Example] (Example 1) Woven fabric (high-density polyethylene (H
DPE), 1000D filaments were woven at the number of threads and the weft of 14 filaments / inch both), low density polyethylene (LDPE) 60μm was extruded and laminated on one side, and LLDPE (linear low Density polyethylene)
About 20μm / EVOH about 10μm / LLDPE about 20μ
m coextrusion multilayer film (Dainippon Ink and Chemicals, Inc.)
Manufactured by DIFAREN G4100, thickness 50 μm)
Extrusion sand lamination was performed with DPE of 20 μm to obtain a laminated sheet for a bag body. (Total thickness 0.35mm, weight 260
g / m ² ). With this laminated sheet, the LLDPE surfaces are made to face each other so as to form a cube having a length, width, and height of 1 m, and LD
The bag body was formed by hot air welding so that the PE surface was the outer surface. PVC airtight fasteners for the opening and closing fasteners (PVC sheet with PVC nails welded, YK
K Co., Ltd. 8CWT) was used. A copolyester composition (Sumitomo Chemical Co., Ltd. Bondfast VC40 density 1.131) for joining the laminated sheet and the fastener.
Two layers of MFR7) and ethylene glycidyl methacrylate resin (Sumitomo Chemical Co., Ltd., Bondfast 7B, density 0.945 MFR7) were coextruded to a thickness ratio of 1: 1 with a total thickness of about 250 μm. A multi-layered tape made of a film is used as the LDP for the laminated sheet for the main body.
An ethylene glycidyl methacrylate layer was placed on the E layer side and a copolyester composition layer was placed on the fastener side, and hot air welding was performed to obtain an insecticidal bag.

(Example 2) Lamination was performed in the same manner as in Example 1 except that 60 μm of EMA (ethylene-methyl acrylate) was extruded and laminated on one side of the woven fabric used in Example 1 instead of LDPE, and the bag body was similarly obtained. Was formed (total thickness 0.35 mm, weight 260 g / m ² ). The same PVC airtight fastener as in Example 1 was used as the fastener for the opening / closing section. A 250 μm-thick film made of a copolyester composition (Sumitomo Chemical Co., Ltd., Bondfast VC40, density 1.131 MFR7) was interposed for joining the EMA layer side of the laminated sheet and the fastener, and hot air welding was performed to perform an insecticidal bag. And

(Embodiment 3) Using the bag body and the fastener used in Embodiment 2, the EMA surface of the bag body sheet and the fastener are faced to each other and joined by sewing with a sewing part and a laminated sheet for the body. The film made of the copolyester used in Example 2 was hot-air-welded in a tape shape so as to cover the overlapping end portions of the fastener, and sealing treatment was performed to obtain an insecticidal bag.

(Comparative Example 1) PVC tarpaulin (PET multi-filament yarn, 500D, the number of driven yarns was 20 / inch, and PV was used as a sheet constituting the main body.
C coating, total thickness 0.55 mm, weight 600 g / m ² ), and using a PVC airtight fastener similar to that of Example 1, weld all joints with a high frequency welder,
It was an insecticide bag.

[Performance Evaluation] 1. Gas permeability The gas permeability was measured using carbon dioxide gas and oxygen gas according to the gas permeability test method of JIS K7126. The results are shown in Table 1. 2. Bonding strength Peel strength: The width of the bonding portion between the bag body and the fastener was 10 mm, and the width was 3 cm in the direction perpendicular to the bonding. Two strips were entirely overlapped and one end was heat-bonded with a width of 10 mm to obtain a sample. An end of the sample is fixed to each chuck by an Instron type tensile tester,
The T-type was peeled off at a gripping interval of 50 mm and a pulling speed of 50 mm / min to obtain peel strength. If the peel strength is 25 N / 3 cm or more, there is no problem in practical use. Shear strength: The joint portion between the bag body and the fastener was formed into a strip shape having a width (depth) of 10 mm and a width of 3 cm in the direction perpendicular to the joint. Only the ends of the two strips were overlapped with a width of 10 mm and heat-bonded to obtain a sample. An unbonded end of the sample was fixed to each chuck by an Instron type tensile tester, gripping interval 100 mm, pulling speed 200 mm /
The tensile strength was pulled up and down in minutes to obtain the shear strength. Shear strength is 100
If it is N / 3 cm or more, there is no practical problem. The results are shown in Table 1.

3. Carbon dioxide gas with a concentration of 99.9% or more was injected into the airtight insecticidal bag at a rate of 15 liters / minute to fill the interior with carbon dioxide gas, and then the cock was closed and immediately after filling and after leaving for 10 days The carbon dioxide concentration of was measured. In this data, 1
If the internal carbon dioxide concentration after 50 days is 50% or more, it is determined that a practically effective insecticidal effect can be obtained. Similarly, nitrogen gas having a concentration of 99.9% or more was injected at a rate of 15 liters / minute to fill the inside with nitrogen gas, and then the cock was closed, and immediately after filling and after standing for 21 days, The carbon dioxide concentration was measured. In this data, it is determined that a practically effective insecticidal effect can be obtained if the internal oxygen gas concentration after 21 days is 1% or less.

[0034]

[Table 1]

From the results shown in Table 1, in all of the insecticidal bags of Examples, the joining strength of the fastener was high, the durability was excellent, the airtightness was excellent, and the effective insecticidal effect by the inert gas was achieved. It On the other hand, it was found that the insecticidal bag of the comparative example using PVC tarpaulin did not have a problem when filled with carbon dioxide gas, but could not maintain airtightness for a long period of time and was not suitable for an inert gas insecticidal method.

[0036]

The insecticidal bag of the present invention has excellent airtightness,
Suitable for insecticidal treatment using carbon dioxide and inert gas,
The insecticidal material to be filled inside can be arbitrarily selected, is lightweight, has little effect on the environment at the time of disposal, and has an effect that articles can be easily taken in and out. In addition, the insecticidal method using the insecticidal bag of the present invention has an excellent insecticidal effect, there is no concern that the insecticide-treated product will be adversely affected, and the safety is high.

[Brief description of drawings]

FIG. 1 is a perspective view showing an aspect of an insecticidal bag of the present invention.

[Explanation of symbols]

10 insecticide bag 12 bag body 14 fasteners 16 Closable gas inlet

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiyuki Takeda             1-4-16 Nibashi Bakurocho, Chuo-ku, Tokyo Wisteria             Mori Kogyo Co., Ltd. F term (reference) 2B121 AA11 BB25 CC39 EA01 FA15                 4H011 AC01 BA01 BB18 BC18 BC19                       DA07 DA11 DB03 DH02 DH04                       DH19

Claims (7)

[Claims] 1. A laminate comprising a fastener capable of maintaining airtightness in a closed state and a closable gas inlet, and a bag body having a polyolefin resin layer and a gas barrier layer, and not including a chlorine resin layer. An insecticidal bag made of sheets. 2. The insecticidal bag according to claim 1, which has an airtightness capable of maintaining a carbon dioxide gas concentration of 50% or more for 7 days or more when filled with a carbon dioxide gas concentration of 70% or more. 3. When the gas in the insecticidal bag is replaced with an inert gas having an oxygen concentration of 0.3% or less and the oxygen concentration is 0.3% or less, the oxygen concentration of 1% or less can be maintained for 21 days or more. The insecticidal bag according to claim 1, which is airtight. 4. The laminated sheet according to claim 1, further comprising a stretched cloth layer made of a polyolefin resin.
The insecticidal bag according to any one of 1. 5. The fastener is fixed to a laminated sheet forming a bag main body through a laminated tape having at least a resin layer heat-bondable to a material forming the fastener and a resin layer heat-bondable to a laminated sheet material. The insecticidal bag according to any one of claims 1 to 4, which is provided. 6. The insecticidal bag according to claim 1, wherein the fastener and the laminated sheet forming the bag body are sewn together, and a seaming tape is thermally adhered to the sewn portion. . 7. A pest insect by accommodating the insecticidal bag according to any one of claims 1 to 6 with an article, filling the insecticidal bag with an inert gas, closing the article, and holding the article for a predetermined time. How to kill insects.