JP2006111284A - Low-absorptive packaging material for insecticide - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-absorptive packaging material for an insecticide which hardly allows an effective component to be absorbed into the packaging material, thus prevents the deterioration of an insecticidal effect even if an insecticide sheet impregnated with an insecticide containing a pyrethroid-based pesticide volatile under normal temperature is packaged in the packaging material. <P>SOLUTION: The low-absorptive packaging material A is used to package the insecticide sheet impregnated with the insecticide containing the pyrethroid-based pesticide volatile under normal temperature. The packaging material A at least includes a laminate consisting of a barrier film layer 1 and a sealant layer 4 which is made of a single layer film containing a polyolefine having a density of 0.926 or higher. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a low-adsorption packaging material for an insect repellent that packages an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide. More specifically, the present invention relates to an insect repellent sheet in a packaging bag. In the insect repellent package containing the insecticide, the room temperature volatile pyrethroid insecticide, which is an active ingredient of the insect repellent, is not adsorbed to the packaging bag even during long-term storage, distribution and use, and does not cause a decrease in insect repellent effect The present invention relates to a low-absorption packaging material for insect repellents.

  Conventionally, as a packaging material (wrapping material) for packaging an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide, a laminated film in which a barrier film and a sealant film are laminated is generally used. As the sealant, polyolefins such as polyethylene and polypropylene are used in consideration of suitability for packaging machinery. However, it is known that the room temperature volatile pyrethroid insecticide, which is an active ingredient in the insect repellent sheet, is adsorbed by the polyolefin. Therefore, in order to lengthen the expiration date of use, a method of impregnating the sheet with a large amount of insect repellent in anticipation of the amount adsorbed in advance has been taken.

  Therefore, amorphous polyester resin sealants (PET sealants), polyacrylonitrile resin sealants (PAN sealants), etc., are sealants that are difficult to adsorb room temperature volatile pyrethroid insecticides that are active ingredients in insect repellent sheets. However, it is inferior in high-speed filling suitability and usually cannot be used for pillow packaging. In addition, there is a drawback that the price is about 3 to 4 times higher than that of a normal polyolefin sealant.

  The present invention is intended to solve such problems of the prior art and is effective for packaging materials even when an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide is packaged. An object of the present invention is to provide a low-adsorption packaging material for an insect repellent that hardly absorbs components and does not cause a decrease in insect repellent effect.

  The present invention has been made to solve the above problems, and the invention according to claim 1 of the present invention is an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide ( B) is packaged, and at least the barrier film layer (1) and the sealant layer (4) are laminated, the insecticide low-adsorption packaging material (A), the sealant layer (4) has a density of 0.926 or more A low-adsorption packaging material for insect repellents, comprising a single-layer film containing the polyolefin.

  The invention according to claim 2 of the present invention wraps at least a barrier film layer (1) and a sealant layer (4) which package an insect repellent sheet (B) impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide. )), The sealant layer (4) comprises at least a laminate surface layer (5), an intermediate layer (6), and a seal surface layer (7). Is a low-adsorption packaging material for insect repellents, characterized by comprising a co-extruded multilayer film in which

The invention according to claim 3 of the present invention is the low adsorption packaging material for insect repellent according to claim 2, wherein the intermediate layer (6) is made of polyolefin having a density of 0.926 or more, and the sealing surface layer (7). Is a low-absorption packaging material for insect repellents, characterized in that it is made of polyolefin having a density of 0.915 or less.

  The invention according to claim 4 of the present invention is the low adsorption packaging material for insect repellent according to any one of claims 1 to 3, wherein the barrier film layer (1) is at least a film base layer (2). And a vapor-deposited layer (3) made of an inorganic oxide.

  The invention according to claim 5 of the present invention is the insect repellent packaging material according to any one of claims 1 to 4, wherein the room temperature volatile pyrethroid insecticide is empentrin. It is a low-adsorption packaging material for agents.

  The low-adsorption packaging material for insect repellents according to the present invention is formed by packaging an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide, and is formed by laminating at least a barrier film layer and a sealant layer. In the low-absorption packaging material for insect repellents, the sealant layer is a single-layer film containing a polyolefin having a density of 0.926 or more, or a coextruded multilayer in which at least a laminate surface layer, an intermediate layer, and a seal surface layer are sequentially laminated. It comprises a film, the intermediate layer is formed of a polyolefin having a density of 0.926 or more, and the sealing surface layer is formed of a polyolefin having a density of 0.915 or less, thereby containing a room temperature volatile pyrethroid insecticide. Even when an insect repellent sheet impregnated with an insect repellent is packaged, it is difficult for the active ingredient to be adsorbed on the packaging material, and the insect repellent effect may not be reduced. Furthermore, the barrier film layer is formed by laminating at least a film base layer and a vapor deposition layer made of an inorganic oxide, so that a room temperature volatile pyrethroid insecticide that is an active ingredient of an insect repellent is volatilized to the outside. It is possible to provide a low-absorption packaging material for insect repellents that does not occur.

  Embodiments of the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a plan view showing one embodiment of the layer structure of the insect repellent low adsorption packaging material (A) according to the present invention, and FIG. 2 is the layer of the insect repellent low adsorption packaging material (A) according to the present invention. It is a top view which shows the other Example of a structure, FIG. 3 is a top view which shows 1 Example which packaged the insect repellent sheet | seat with the low adsorption packaging material (A) for insect repellents concerning this invention.

  As shown in FIG. 1, the layer structure of the low-absorbent packaging material for insect repellent (A) of one embodiment according to the present invention is an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide ( B) is packaged, and at least the barrier film layer (1) and the sealant layer (4) are laminated, the insecticide low-adsorption packaging material (A), the sealant layer (4) has a density of 0.926 or more It is formed from the single layer film containing polyolefin of this.

  Thus, by using a relatively high density polyolefin for the sealant layer (4), the active ingredient of the insect repellent containing the room temperature volatile pyrethroid insecticide is hardly adsorbed on the packaging material, and the insect repellent effect is reduced. However, it is necessary to consider heat sealability, which is an important point in the construction of packaging materials. In general, insecticides are used in order not to impede high-speed filling suitability and low-temperature sealability. As shown in FIG. 2, the layer structure of the low-adsorption packaging material (A) for use is that the sealant layer (4) includes at least a laminate surface layer (5), an intermediate layer (6), and a seal surface layer (7). And a coextruded multi-layer film.

Further, it is preferable that the intermediate layer (6) of the sealant layer (4) is formed of a polyolefin having a density of 0.926 or more, and the sealing surface layer (7) is formed of a polyolefin having a density of 0.915 or less. In particular, it is more preferable that the intermediate layer (6) is made of polyolefin having a density of 0.941 or more.

  As a method for producing the single layer film or the coextruded multilayer film, there are a flat die method (T die method) and an inflation method. In particular, when producing a co-extrusion multilayer film, use multiple extruders, melt and knead different resins or differently distributed resins with different extruders, and laminate them with an adapter or multilayer die. Extruded in such a state, but depending on the part to be laminated, the feed block method (black box method), multi-manifold method (in-die bonding method), Alcoa method (die-outside bonding method), etc. are appropriately selected and used. Yes.

  One of the important points in constituting the packaging material is the heat sealability of the sealant layer (4). As a heat sealing method, heat sealing is performed by applying a predetermined heat with a so-called heated bar, roll, ring shape or the like. In addition, there are methods such as impulse sealing, high frequency sealing, ultrasonic sealing, and fusing sealing, all of which are methods of melting and bonding the seal layer surface of the sealant layer (4) using heat.

  Polyolefin is generally used as the heat seal material for forming the sealant layer (4), but polyethylene (PE) and polypropylene (PP) are often used. Among these, polyethylene (PE) is preferable in consideration of high-speed filling suitability, low-temperature sealability, cost, and the like.

  The polyethylene (PE) is produced by polymerizing ethylene gas obtained by distilling petroleum, and polyethylene (PE) having different properties can be obtained by this polymerization method. The high pressure method (1000-3500 atm) yields low density to medium density polyethylene, while the low pressure method and medium pressure method (30-100 atm) yields high density polyethylene.

  Generally, the density of polyethylene (PE) is 0.910 to 0.925 for low density polyethylene (LDPE), 0.926 to 0.940 for medium density polyethylene (MDPE), and high density polyethylene (HDPE). Is 0.941 to 0.965.

  Low density polyethylene (LDPE) produced by the high pressure method can be branched in some places in the main chain, which prevents the regular arrangement of molecules, and the degree of crystallinity (polyethylene is usually non-crystalline and non-crystalline). It is made of a crystalline part and the degree of the crystalline part) is small (about 60%), so it has flexibility and good heat sealability, but the degree of adsorption of content components such as insect repellents. Is big. By changing the polymerization conditions by the high-pressure method, medium density polyethylene (MDPE) having a small number of branches and high crystallinity can be produced. In general, polyethylene with higher crystallinity has a higher density, and the hardness and tensile strength increase accordingly. However, the heat sealability required for the sealant layer (4) deteriorates, but the contents of insect repellents, etc. The degree of adsorption of physical components becomes smaller.

  Next, the high-density polyethylene (HDPE) produced by the low-pressure method and the medium-pressure method has a high crystallinity (about 90%), so that the mechanical strength is increased and the heat sealability is deteriorated. The degree of adsorption of the content components such as the agent becomes very small.

From the above, as described above, the layer structure of the low-absorbent packaging material for insect repellents (A) according to the present invention is such that the sealant layer (4) includes at least the intermediate layer (6) and the seal surface layer (7 It is preferable that the intermediate layer (6) is formed of a polyolefin having a density of 0.926 or more, and the sealing surface layer (7) is a density of 0.915 or less. It is preferably formed of polyolefin. In particular, the intermediate layer (6) has a density of 0.94.
More preferably, it is formed of one or more polyolefins.

  Next, since the polyethylene (PE) film described above is easy to permeate gases such as oxygen and carbon dioxide, the insecticide sheet (B) impregnated with an insecticide containing a room temperature volatile pyrethroid insecticide is packaged. In this case, the barrier film layer (1) is laminated so that the active ingredient does not volatilize outside.

  Examples of the barrier film layer (1) include a cellophane film, a polyvinyl alcohol film, a nylon film, a polyvinylidene chloride film, an aluminum foil laminated film, and an aluminum vapor deposition film. Cellophane, polyvinyl alcohol, and nylon are in a dry state. Although the gas permeability is small, the permeability increases as the moisture is absorbed. In addition, polyvinylidene chloride film is taken up as one of the environmental problems because it generates harmful dioxins at the time of incineration and is desired to be replaced.

  In addition, in the case of the aluminum foil laminated film or aluminum vapor deposition film, although it is excellent in moisture proofing, oxygen gas barrier property, water vapor barrier property, scent retention, light shielding property, etc., in recent years, incineration treatment has been performed in disposal after use. When it does, since there are problems with so-called disposal such as a problem that the aluminum remains as a residue and a problem that may damage the incinerator, the film base layer (2) is made of an inorganic oxide. The barrier film layer (1) in which the vapor deposition layer (3) is laminated is preferable.

  The material used for the film base layer (2) is not particularly limited, but a single film and various laminated films can be used in consideration of processability and the like.

  For example, polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyolefins such as polyethylene (PE), polypropylene (PP), polystyrene (PS), nylon-6, nylon Polyamide (PA) such as -66, polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinyl alcohol (PVA), ethylene-vinyl alcohol A polymer (EVOH), polyether sulfone (PES), polymethyl methacrylate (PMMA), or a copolymer thereof is an unstretched or stretched film.

  Usually, these are processed into a film and used, and in particular, from the viewpoint of strength, cost, etc., a polyethylene terephthalate film (PET) or a polypropylene film (OPP) arbitrarily stretched in a biaxial direction is used. It is preferable.

  The thickness of the base material layer (1) is preferably in the range of 3 to 200 μm, more preferably 6 to 30 μm, in consideration of workability.

  Next, as the vapor deposition layer (3) of the inorganic oxide, a metal oxide can be basically used. For example, aluminum, silicon, magnesium, calcium, potassium, tin, sodium, boron, Examples thereof include oxides such as titanium, lead, zirconium, and yttrium, or a mixture thereof.

  In general, aluminum oxide, silicon oxide, and magnesium oxide are preferably used from the viewpoint of transparency, physical properties, and productivity.

As a method of forming the inorganic oxide vapor deposition layer (3), a vacuum vapor deposition method, a sputtering method, or the like can be used. However, in consideration of productivity, production cost, etc., the vacuum vapor deposition method is preferable. .

  There are three types of vacuum deposition methods, depending on the form of the body to be vapor-deposited. 1) Batch method: vapor deposition method of molded products, 2) take-up semi-continuous method: vacuum for roll-shaped film (web) After unwinding, vapor deposition, and winding in the system, return to the atmospheric system again and take out the vapor deposition product. 3) Unwinder (unwinding device) for roll type film (web) ) And a rewinder (winding device) are arranged in the atmospheric system, and a vapor deposition drum and an evaporation source are arranged in a vacuum system to vaporize the evaporated substance on a roll film (web). This is a completely continuous method called a to-air method and has a feature of high productivity.

  When evaporating a vaporized material on a roll-shaped film (web), a take-up semi-continuous method is particularly widespread. Describes the internal structure.

  First, the constituent elements are a roll film (web), an evaporation source, an evaporation substance, a vapor deposition drum, a vacuum system, an unwinder (unwinding device), a rewinder (winding device), a guide roll, and the like.

  Next, the outline of the work process will be described. First, as a preparatory step, the door of the vacuum evaporation apparatus is opened, a roll-shaped film (web) is set in the unwinder (unwinding apparatus), and it is arranged between the unwinder and the evaporation drum. The web is caused to travel to the vapor deposition drum through a guide roll that is wound around the rewinder (winding device) via a guide roll disposed between the web and the rewinder (winding device). Preparation of vapor deposition of the evaporating substance on is completed.

  Next, the door of the vacuum vapor deposition apparatus is closed, and the vacuum vapor deposition chamber divided by the vacuum suction constant pressure chamber and the partition wall in the vacuum vapor deposition apparatus is set to a predetermined vacuum environment by a vacuum pump. The web is fed out and evaporated on the web that has been run through a guide roll by evaporating an evaporating substance from an evaporation source disposed at the lower part of the vapor deposition drum.

  Since the vapor deposition drum is cooled, the vaporized substance is recrystallized and fixed on the web, and the vapor deposited on the rewinder side guide roll is wound around the rewinder.

  The internal structure of the vacuum deposition apparatus is divided into a vacuum suction constant pressure chamber and a vacuum deposition chamber by partition walls. The vacuum suction constant pressure chamber is composed of an unwinder, guide roll, tension control device, speed control device, position control device, and vapor deposition drum. Some rewinders are arranged.

In the vacuum deposition chamber, a part of the deposition drum, the evaporation source, its heating device, and the like are arranged, and the vacuum suction constant pressure chamber has a degree of vacuum of 1 by a vacuum pump attached to the periphery of the vacuum deposition apparatus main body. × 10 ⁰ MPa about, the vacuum deposition chamber provided via the partition wall is set to a degree 1 × 10 ^-2 MPa (SI units).

  Since the two chambers are divided by the partition walls, impurities (dust) such as gas generated from the web in the vacuum suction constant pressure chamber are unlikely to adversely affect the deposition in the vacuum deposition chamber.

  On the contrary, the radiant heat from the evaporation source arranged in the vacuum deposition chamber has little influence on the vacuum suction constant pressure chamber, so that the influence of the heat on the web is small.

  The vacuum deposition method is also a heating method: 1) Indirect resistance method, 2) Direct resistance heating method (wire feed method), 3) High frequency induction heating method, 4) Electron beam method (Electoron Beam, EB method for short) 4 There are two methods, but when the evaporated substance uses an insulating metal oxide such as silicon oxide or aluminum oxide, the electron beam method with high energy conversion efficiency is optimal.

  The winding type electron beam vacuum deposition method is a method in which an evaporating substance such as silicon oxide or aluminum oxide is directly irradiated with an electron beam, and the surface of the evaporating substance is scanned to heat the evaporating substance surface. In this method, energy is converted at a portion where the beam hits to evaporate the evaporated substance.

  Although the thickness of this vapor deposition layer (3) is suitably selected by the end use of a vapor deposition film, it is preferable to exist in the range of 5-400 nm.

  If the thickness of the vapor deposition layer (3) is less than 5 nm, a uniform film cannot be provided, so that sufficient oxygen gas barrier properties, water vapor barrier properties, aroma retention properties, etc. cannot be obtained. This is not preferable because the deposited film tends to be cracked or peeled off due to external factors such as bending and tension.

  Next, the low-absorption packaging material for insect repellent (A) of the present invention has a printing ink layer (8) and an anchor coating layer (not shown) on the vapor deposition layer (3) constituting the barrier film layer (1). The layer structure may be provided.

  When providing the printing ink layer (8) to this barrier film layer (1), it is on the film base material layer (2) which is the surface of this barrier film layer (1), or the vapor deposition layer (3) which is the back surface Although it is possible to print on either of the above surfaces, generally, a printing ink layer (8) is provided on the vapor deposition layer (3) on the back surface in consideration of the friction resistance, weather resistance, etc. of the ink. preferable.

  The printing ink for forming the printing ink layer (8) includes a colorant composed of a pigment or a dye that imparts color to the ink, and a resin that adheres to the substrate while dispersing and holding the colorant in fine particles. And a solvent comprising a solvent capable of stably dissolving the resin, maintaining dispersibility of the pigment and dye, fluidity of the ink, and transferring an appropriate amount of ink from a printing plate For the purpose of improving the dispersibility, color developability, preventing precipitation, and improving fluidity, an auxiliary agent such as a surfactant is used. In particular, the colorant is preferably a pigment having good weather resistance.

  As a printing method for providing the printing ink layer (8), for example, a known printing method such as a gravure printing method, a silk screen printing method, or a flexographic printing method can be used, but copper plating is performed on the surface of an iron cylinder (cylinder). Forming a base, providing a release layer on the copper-plated surface, further copper-plating, and creating a recess (cell) by engraving or corrosion method on the polished copper surface of the surface, A gravure printing method is preferable in which the printing ink in the cell is transferred onto the vapor deposition layer (3), and the printed matter can be printed in a colorful manner and has a high appealing effect.

  In addition, when providing a printing ink layer (8) on the said vapor deposition layer (3), in order to improve the adhesiveness of this vapor deposition layer (3) and this printing ink layer (8), this vapor deposition layer ( 3) A primer layer (not shown) may be formed thereon.

The polyester resin used as a primer for forming the primer layer is terephthalic acid, isophthalic acid, phthalic acid, methylphthalic acid, trimellitic acid, pyromellitic acid, adipic acid, sebacic acid, succinic acid, maleic acid, fumaric acid, Acid raw materials such as tetrahydrophthalic acid, methyltetrahydrophthalic acid, hexahydrophthalic acid and reactive derivatives thereof, ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexane Diolene, diethylene glycol, dipropylene glycol, 1,4-cyclohexanedimethanol, neopentyl glycol, isopentyl glycol, bishydroxyethyl terephthalate, hydrogenated bisphenol A, hydrogenated bisphenol AA It is produced by a known method from alcohol raw materials such as side adduct, trimethylolethane, trimethylolpropane, glycerin, pentaerythritol, 2,2,4-trimethylpentane-1,3-diol, and is particularly limited. It is not a thing.

  In addition, an isocyanate (urethane) resin, an epoxy resin, a melamine resin, and an acid anhydride resin added to the primer mainly act as a curing agent. As a method for coating the primer, a known gravure roll coating method, reverse roll coating method, or the like can be used, but a gravure that can be coated in-line as the first color on a gravure printing machine provided with a printing ink layer (8). It is preferable to use a roll coating method.

  Next, a method for laminating the barrier film layer (1) and the sealant layer (4) and an adhesive for forming the adhesive layer (9), particularly an adhesive for dry lamination will be described in detail below.

  First, as a lamination method, for example, a known method such as a dry lamination method, a non-solvent dry lamination method, a hot melt lamination method, or an extrusion lamination method can be used.

  The dry lamination method includes three sections, a coating unit for applying an adhesive on a film, a drying device, and a nip roller unit, and an unwinding, winding, and tension control system.

  The coating portion generally employs a gravure roll coating method or a reverse roll coating method.

  As the dry lamination adhesive, a solvent type adhesive or a solventless type adhesive is used. However, when a solventless type adhesive is used, a drying device is not necessary, and this is called a non-solvent dry lamination method. It is out.

  The hot melt lamination method is a method in which a hot melt adhesive such as a heat-melted ethylene-vinyl acetate copolymer (EVA) is applied onto a film, and another film is immediately laminated.

  The extrusion lamination method involves heating a thermoplastic resin such as polyethylene or polypropylene, melting it in a cylinder called a cylinder, extruding it by applying pressure with a screw, and forming a narrow slit called a T die at the tip of the cylinder. The thermoplastic resin dissolved in a curtain shape is extruded and laminated into a film shape.

  As described above, the method of laminating the barrier film layer (1) and the sealant layer (4) includes a dry lamination method, a non-solvent dry lamination method, a hot melt lamination method, a sandwich lamination method using an extrusion lamination method, and the like. However, the dry lamination method is preferable in view of adhesiveness, productivity, cost and the like.

  Next, as the adhesive used in the dry lamination method, polyurethane, polyester, epoxy, polyacrylic, polyvinyl acetate, cellulose, and other laminating adhesives can be used.

  Next, as the room temperature volatile pyrethroid insecticide used in the present invention, 4-methyl-4-hepten-1-in-3-yl d-cis, trans-chrysanthemate (hereinafter, empentrin), d1-3 -Allyl-2-methyl-4-oxo-2-cyclopentenyl d1-cis, trans-chrysanthemate (hereinafter Allethrin), (5-benzyl-3-furyl) methyl d-cis, trans-Chrysanthemate (hereinafter referred to as Resmethrin), 2-methyl-4-oxo-3- (2-propenyl) -2-cyclopenten-1-yl 2,2,3,3-tetramethylcyclopropanecarboxylate (hereinafter referred to as teraretrin), and the like. Among these, empentrin, which has a high insect repellent effect and low toxicity, is preferable.

  As described above, the low-adsorbent packaging material for insect repellents (A) according to the present invention packages an insect repellent sheet (B) impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide, at least a barrier. In the insecticidal low-adsorption packaging material (A) formed by laminating the film layer (1) and the sealant layer (4), the sealant layer (4) includes a single-layer film containing a polyolefin having a density of 0.926 or more, or At least a laminate surface layer (5), an intermediate layer (6), and a seal surface layer (7) are co-extruded multilayer films, and the intermediate layer (6) has a density of 0.926 or more. And the sealing surface layer (7) is made of polyolefin having a density of 0.915 or less, and the barrier film layer (1) is at least a film substrate layer (2). Even when an insecticide sheet impregnated with an insecticide containing a room temperature volatile pyrethroid insecticide is packaged, the active ingredient is adsorbed on the packaging material by laminating the vapor deposition layer (3) made of oxide. It is hard to be done, and it can be set as the low adsorption packaging material (A) for insect repellents which does not cause the fall of an insect repellent effect, and an active ingredient does not volatilize outside.

  Hereinafter, the low adsorption packaging material (A) for insect repellents of the present invention will be described in more detail with specific examples, but the present invention is not limited to these and is applied to a wider range. Is.

<Example 1>
As shown in FIG. 1, the laminate used for the low-absorption packaging material for insect repellent (A) of the present invention has a biaxially oriented polypropylene film (OPP) having a thickness of 20 μm on the outermost base film layer (2). ) Was used to obtain a barrier film layer (1) in which a 20 nm-thick deposition layer (3) was provided on the base film layer (2) by vacuum deposition.

Next, a printing ink layer (8) was formed on the vapor deposition layer (3) constituting the barrier film layer (1) by a gravure printing method using a polyurethane two-component reactive ink. Next, about 3.0 g / m ² (dry) of an adhesive for dry lamination is applied on the printing ink layer (8) to form an adhesive layer (9). On the adhesive layer (9), As a sealant layer (4), a separately prepared laminate surface layer (5) is formed of polyethylene having a density of 0.926, an intermediate layer (6) is formed of polyethylene having a density of 0.941, and a seal surface layer (7) Is formed of polyethylene having a density of 0.915, a polyethylene multilayer film having a thickness of 40 μm (manufactured by Tamapoly Co., Ltd .: trade name MZ420) is laminated by a dry lamination method, and a barrier film layer (1) / printing ink layer ( A laminate having a layer structure of 8) / adhesive layer (9) / sealant layer (4) was obtained.

Next, the wound laminate is formed into a 100 mm × 100 mm four-side seal type packaging bag, and a commercially available insect repellent sheet (B) (manufactured by Dainippon Insect Chrysanthemum Co., Ltd .: commodity) 1 name) was completely sealed and stored at 40 ° C. for 1 month, and the amount of empentrin adsorbed on the bag was measured by gas chromatography. The measurement results are as shown in Table 1. The instrument uses a gas chromatograph with a flame ionization detector (FID-DC), GC-15A / PF type manufactured by Shimadzu Corporation. The measurement conditions of FID-DC are as follows: Column: DB-17 (0.53 mm.d × 15 m) manufactured by J & W, inlet temperature: 300 ° C., column temperature: 120 to 250 ° C. (heating rate 5 ° C./min), Carrier gas: helium 20 ml / min, hydrogen 30 ml / min, air 700 ml / min.

  Below, the comparative example of this invention is demonstrated.

<Example 2>
In Example 1, a laminate was prepared and measured in the same manner except that a polyethylene single layer film (thickness: 40 μm) having a density of 0.915 was used as the sealant layer (4). The measurement results are as shown in Table 1.

<Example 3>
In Example 1, a laminate was prepared and measured in the same manner except that a polyethylene single-layer film (thickness: 40 μm) having a density of 0.920 was used as the sealant layer (4). The measurement results are as shown in Table 1.

<Example 4>
In Example 1, a laminate was prepared and measured in the same manner except that a polyethylene single layer film (thickness 40 μm) having a density of 0.925 was used as the sealant layer (4). The measurement results are as shown in Table 1.

表１は、本発明品（実施例１）と比較品（実施例２、実施例３、実施例４）の上記の測定により得られたエムペントリンのピーク吸着量を実施例２（現行品）の値を１００として相対値で表したもので、％で表現した。

Table 1 shows the peak adsorption amount of empentrin obtained by the above measurement of the product of the present invention (Example 1) and the comparative product (Example 2, Example 3, Example 4) of Example 2 (current product). The value was expressed as a relative value with a value of 100, and expressed in%.

<Comparison result>
As shown in Table 1, the product of the present invention (Example 1) clearly suppressed the adsorption of empentrin compared to the comparative products (Example 2, Example 3, and Example 4).

It is a top view which shows one Example of the layer structure of the low adsorption packaging material for insecticides which concerns on this invention. It is a top view which shows the other Example of the layer structure of the low adsorption packaging material for insecticides which concerns on this invention. It is a top view which shows 1 Example which packaged the insect repellent sheet | seat with the low adsorption packaging material for insect repellents concerning this invention.

Explanation of symbols

A ... Low adsorption packaging material for insect repellent B ... Insect repellent sheet 1 ... Barrier film layer 2 ... Base film layer 3 ... Deposition layer 4 ... Sealant layer 5 ... Laminate Surface layer 6 ... Intermediate layer 7 ... Sealing surface layer 8 ... Printing ink layer 9 ... Adhesive layer

Claims (5)

  Packaging an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide, at least a low adsorption packaging material for insect repellent comprising a laminate of a barrier film layer and a sealant layer, wherein the sealant layer comprises: A low-adsorption packaging material for insect repellents, comprising a single-layer film containing a polyolefin having a density of 0.926 or more.   Packaging an insect repellent sheet impregnated with an insect repellent containing a room temperature volatile pyrethroid insecticide, at least a low adsorption packaging material for insect repellent comprising a laminate of a barrier film layer and a sealant layer, wherein the sealant layer comprises: A low-adsorption packaging material for insect repellents comprising a coextruded multilayer film in which at least a laminate surface layer, an intermediate layer, and a seal surface layer are sequentially laminated.   The low-adsorption packaging material for insect repellents according to claim 2, wherein the intermediate layer is made of polyolefin having a density of 0.926 or more, and the sealing surface layer is made of polyolefin having a density of 0.915 or less. .   The low-adsorption package for an insect repellent according to any one of claims 1 to 3, wherein the barrier film layer is formed by laminating at least a film base layer and a vapor deposition layer made of an inorganic oxide. Wood.   The low-adsorption packaging material for insect repellents according to any one of claims 1 to 4, wherein the room temperature volatile pyrethroid insecticide is empentrin.

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