JPS63309272A - Preparation of drug-containing reticulated body - Google Patents

Abstract

PURPOSE:To prevent the scattering or the consumption of a drug, to facilitate the cutting of breaks and to enhance a fixed form property and longitudinal and lateral mechanical strength, by cutting a large number of discontinuous breaks in a multilayer laminate in a zigzag pattern to stretch said laminate in the direction right-angled to the direction of the breaks and laminating two stretched ones to a drug impermeable plastic sheet in a warp-weft state so as to bring said plastic sheet to an outer layer. CONSTITUTION:A sheet 2, which is composed of a resin formed by impregnating a drug impregnating resin such as an ethylene/vinyl acetate copolymer with a drug such as perfume or a resin composition prepared by further diluting the drug impregnated resin with a polyolefinic resin, is delivered and drug impermeable sheets 3, 3' composed of a saponified ethylene/vinyl acetate copolymer are laminated to said sheet 2 and the whole is uniaxially stretched by stretching or rolling rolls 5, 5' and a large number of uncontinuous breaks 9 are cut in the laminate in a zigzag pattern in a flow direction by a fiber dividing jig 6 and the stretched laminate is widened on a belt conveyor 7 in the direction right-angled to the break direction to form a widened body 8. Subsequently, the widened body 8 is appropriately cut and the cut ones are laminated in a warp-weft state to obtain a drug-containing reticulated body 7.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that, before it is used, there is almost no dispersion or consumption of the drug, it is easy to make cuts, and it has excellent shapeability and mechanical strength in both vertical and horizontal directions. The present invention relates to a method for producing an excellent drug-containing network at an extremely low cost.

[Prior Art] Conventionally, methods for producing a plastic mesh body include a method in which a thermoplastic resin is directly formed into a network by extrusion molding, or a method in which a thermoplastic resin is formed into filaments and the filaments are braided to form a network. etc. are commonly practiced.

However, when these methods are applied to drug-containing thermoplastic resins, they undergo a significant thermal history and the drugs,
For example, volatile chemicals such as fragrances may change in quality due to thermal deterioration or dissipate.
Not only does it cause more wear and tear, but it also requires a complicated process and is expensive.

Another method is to manufacture a thermoplastic film and -
A method is also known in which, after axial stretching, the stretched film is cut, widened, and reticulated.

When these conventional methods are applied to a chestnut agent-containing thermoplastic resin film, it is not only difficult to make mechanical cuts in the drug-containing thermoplastic resin film because it is soft, but also has low mechanical strength. .

In addition, since the net-like body formed in this way is subjected to a slight force that resists the width expansion, it is necessary to mechanically fix it after widening to prevent it from shrinking, or to heat-set it to give it a regular shape.
set) must be done.

[Problem to be solved by the invention J] The purpose of the present invention is to
There is almost no chemical dissipation or consumption, and it is easy to make cuts.
The present invention also provides a method for producing a drug-containing network at an extremely low cost, which has excellent shapeability and mechanical strength in both vertical and horizontal directions.

[Means for Solving the Problems] The inventors of the present invention have conducted extensive research to solve the above problems, and as a result, have completed the present invention.

That is, in the present invention, a large number of discontinuous cuts are made in a staggered pattern in a multilayer laminate in which a drug-impermeable PLUSDEC sheet is laminated on one or both sides of a drug-containing thermoplastic resin sheet or film. 4. A method for producing a drug-containing net-like body, characterized in that two widened bodies widened in a direction perpendicular to this direction are laminated in a warp-to-width pattern with a drug-impermeable plastic sheet serving as the outer layer.

The drug-containing thermoplastic resin sheet or film used in the present invention (hereinafter simply referred to as a sheet) refers to a drug-impregnated thermoplastic resin sheet that is compatible with the drug, impregnated or blended with the drug (FFL kneading), applied, etc. This is a sheet that has been treated with

The drug-impregnated thermoplastic resin used here includes polybutene, polyvinyl chloride, petroleum resin, unvulcanized natural rubber or synthetic rubber, carboxyl group-containing ethylene copolymer, and especially ethylene-vinyl acetate copolymer. polymer,
Ethylene-acrylic ethyl copolymer is preferred.

Drug-impermeable plus deck i- used in the present invention
Examples include polyamide resins, polyvinylidene chloride resins, polyvinyl chloride resins, saponified ethylene-vinyl acetate copolymers, and polyester resins. Examples include cellophane, metallized film, and the like.

Among these sheets, transparent plastic sheets are preferably used.

The drug used in the present invention is preferably a vaporizable drug. In addition, if the drug is solid, powder, tablets, etc. may be dissolved in alcohol, water, etc., and in the case of perfume oil, etc., it may be impregnated with a drug-impregnated resin sheet, blended (kneaded), applied, etc. It may also be used as

Examples of the drugs include fragrances, various repellents, deodorants, bactericides, fungicides, preservatives, insect repellents, rust preventives, and rat repellents.

1) There are natural fragrances and artificial fragrances, and natural fragrances include Jacora, Civet,
Vegetable fragrances made from animal fragrances such as Kasdol (Kairi m > 63 and ambergris), and plant essential oils such as lavender oil, peppermint oil, lemon oil, orange oil, rose oil, camphor oil, sandalwood oil, and cypress oil. There are fragrances.

In addition, as artificial fragrances, terpene compounds or aromatic
Synthetic fragrances consisting of group compounds, etc., or single substances whose components are separated from essential oils mainly by fractional distillation (fragrances, other various fl 1tiff i ingredients, synthetic ff1l'31, natural fragrances, etc.) are mixed and prepared to be suitable for practical use. Examples include Preparation 60 and the like, and at least one of these is used.

In addition, as specific examples of the other drugs mentioned above, 2) Fresh Shiraimatsu (product name: White #f Matsushinyaku (manufactured by Taisei), Biodash (product name: manufactured by Osaka pt1ij (fl), (...Tokyo) Deodorizers such as Seikagaku Kenkyushin) and Aniko (trade name: Minato Sangyo (Tai)); 3) Antifungal agents such as thiabendazole, vinazine, and α-bromucinnamaldehyde; 4) Alcohols, formalin, Salicylic acid, creosote, phenol, nide [1] Bactericidal agents such as furazone, nitrofuryl acrylic acid amide, etc.; 5) Synthetic pyrethrin analogs such as natural pyrethrin, binamine: vermethrin: Baberthrin: (all product names: manufactured by Sumitomo Chemical ■) Pyrethroid insect repellents such as compounds: 6) Insect repellents and insecticides such as DDT agents, Bl-I C agents, Drin agents, Parathion agents, DDVP agents, PGP agents, etc.Nia) Naramycin (product name: manufactured by Tanabe Seiyaku ■) , Ramtalin (trade name: manufactured by Matsushita Electric Works ■), cotomycin (trade name: manufactured by Osaka Kasei ■), etc.: 8) Lemongrass oil, dog and cat repellents such as tobacco tar: 9) Dicyclohexylammonium Volatile rust inhibitors such as salts of organic amines such as nitrites and heterocyclic amines such as benzotriazole and methylbenzotriazole: 10) Food preservatives such as sorbic acid and dehydroacid: 11) Phenylmercury acetate , phenylmercury oleate, copper naphthenate, copper oleate, and other antifouling agents;
Two or more of these drugs may be used in combination depending on the purpose, use, etc.

Hereinafter, the manufacturing method of the present invention will be further explained in detail based on the drawings.

FIG. 1 is a schematic process diagram showing an example of the method for producing a drug-containing network according to the present invention, FIG. 2 is a top view of a film with staggered cuts, and FIG. Figure 4 is a perspective view of a drug-containing network obtained by laminating the widened films in a longitudinal direction. The figures are shown in each figure.

In Figures 1 to 4, 1 is a drug-containing network, 2 is a drug-containing thermoplastic resin sheet, 3.3' is a drug-impermeable plastic sheet, 4.4' is Vintyroll, and 5 and 5' are stretched or A rolling roll, 6 a splitting tool, 7 a belt conveyor, 8 a widening body, and 9 a cut.

In Figure 1, a drug-impregnated resin such as ethylene-vinyl acetate copolymer or ethylene-ethyl acrylate copolymer is impregnated with a drug such as fragrance, or a resin impregnated with the drug is further added to a polyolefin resin. A sheet 2 of the resin composition diluted with 2 is fed out, and a drug-impermeable sheet 3.3' made of saponified ethylene-vinyl acetate copolymer, polyester resin, polyamide resin, polyvinyl chloride resin, etc. is laminated thereon. After uniaxial stretching with stretching or rolling rolls 5°5', a large number of discontinuous zigzag cuts 9 as shown in FIG. Then, the width is widened in the direction perpendicular to the cut direction (in the width direction) AA' (FIG. 2) to create a widened body 8 as shown in FIG. 3.

Next, the widening body 8 is cut as appropriate and laminated in a warp and warp pattern to form a fourth
A drug-containing network 1 as shown in the figure can be obtained.

As another method, a film obtained by splitting a film stretched in the longitudinal direction and a film obtained by splitting a film stretched in the transverse direction may be continuously laminated to form a laminated body in warp and war directions. When laminated in a warp and warp pattern, the fixing means is adhesive,
Conventional methods such as heating are fine. When the laminate is not stretched or rolled, the direction of the cuts is not limited to only the stretching direction, but may be in any direction.

In the present invention, it is important that the outermost drug-impermeable plastic sheet of the warp-like laminate is laminated in a peelable manner. By adopting such a configuration, there is almost no dispersion or consumption of the drug during manufacture or before the start of use.

The porosity of the drug-containing network obtained by the present invention can be adjusted as desired by adjusting the length, number, arrangement, degree of width expansion, etc. of the cuts, and although the porosity may vary slightly, depending on the application. A suitable width can also be obtained by changing the widening magnification.

[Examples] Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

Example insect repellent “Paper Surin” (product name: manufactured by Sumitomo Chemical) 3
An insect repellent stretched polyethylene film with a thickness of 0.05 #Ill obtained by uniaxially stretching a high-density polyethylene film containing 0,01
After extrusion lamination via a molten web of 5IM1 low density polyethylene and at the same time pressing a corona discharge treated second polyethylene terephthalate film with a thickness of 0.012 am on the insect repellent polyethylene layer surface,
After making a large number of discontinuous cuts in the stretching direction, this laminate was expanded to twice the width in the direction perpendicular to the stretching direction.
It was heat set under heating at 0°C to give it regular shape, and a widened body was obtained.

These two widened bodies are aligned in the longitudinal direction so that the first polyethylene terephthalate layer faces each other and the cut directions are perpendicular to each other, and are laminated with adhesive to form an insect repellent net. Ta.

However, two sheets of second polyethylene terephthalate
When the film was peeled off and used as an insect-proof screen, sufficient effectiveness was confirmed.

[Effects of the Invention] As mentioned above, when the conventional method is directly applied to a sheet containing a drug, the sheet 1 is soft and it is difficult to mechanically cut it, but the manufacturing method of the present invention As such, by laminating relatively rigid drug-impermeable plastic sheets Il'Ij, processing becomes much easier.

In addition, by constructing the outermost layer of the laminated body in a warp-like pattern with a peelable drug-impermeable plastic sheet,
It has various effects such that the drug does not dissipate or wear out until it is used, and the drug vaporizes or becomes effective only after the peelable, drug-impermeable plastic sheet is peeled off.

Furthermore, the laminated body having warp and war shapes also has the advantage of being excellent in shapeability and mechanical strength in the vertical and horizontal directions.

[Brief explanation of the drawing]

Figure 1 is a schematic main process diagram showing one embodiment of the manufacturing method of the present invention, Figure 2 is a top view of a film with staggered cuts, and Figure 3 is a diagram showing the cuts in Figure 2. Figure 4 is a perspective view of a drug-containing network formed by laminating widened films in a warp and warp pattern. be. 1... Drug-containing network body, 2... Drug-containing thermoplastic resin sheet, 3.3'...
Drug-impermeable plastic sheet, 4.4'... pinch roll, 5.5'... stretching or rolling roll 6... splitting tool, 7... belt conveyor, 8... widening body, 9... Break. 2nd cause 3rd figure

Claims (1)

[Scope of Claims] 1. After making a large number of discontinuous cuts in a staggered pattern in a multilayer laminate in which a drug-impermeable plastic sheet is laminated on one or both sides of a drug-containing thermoplastic resin sheet or film. A method for producing a drug-containing net-like body, characterized in that two widened bodies widened in a direction perpendicular to the cut direction are laminated in a warp-to-warp pattern with a drug-impermeable plastic sheet as the outer layer. 2. The method for producing a drug-containing network according to claim 1, wherein the laminate is uniaxially stretched. 3. The method for producing a drug-containing network according to claim 1 or 2, wherein the outermost drug-impermeable plastic sheet of the warp-like laminate is peelably laminated. 4. Claim 1, wherein the drug is a vaporizable drug.
3. A method for producing a drug-containing network according to any one of Items 3 to 3. 5. A patent claim in which the vaporizable drug is at least one drug selected from fragrances, repellents, deodorants, bactericides, fungicides, preservatives, insect repellents, rust preventives, and rat repellents. A method for producing a drug-containing reticular body according to Scope 4.