JPS63309270A - Preparation of drug-containing reticulated body - Google Patents

Abstract

PURPOSE:To prevent the scattering or consumption of the title drag at the time of manufacturing or before the beginning of use, in laminating drug impermeable sheets to both surfaces of a drug-containing sheet or film, by temporarily laminating one of said sheets to the drug-containing sheet or film in a releasable manner and subsequently opening a large number of small holes thereto. CONSTITUTION:Perfume is infiltrated in a drug impregnating resin such as a polar group-containing copolymer, for example, an ethylene/vinyl acetate copolymer at normal temp. or in a slightly heated state to form a drug- containing sheet 2 which is, in turn, delivered to superpose drug impermeable sheets 3, 3, composed of a saponified ethylene/vinyl acetate copolymer on both surfaces of the drug-containing sheet 2 and the drug impermeable sheet 3 or 3' is temporarily laminated to the drug-containing sheet 2 in a releasable manner and a large number of small holes are opened thereto by an apparatus such as a punching plate 4 to prepare a drug-containing reticulated body 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a simple structure underlay for air filters, cooling yaJiI shelves, etc., which causes little dissipation or consumption of chemicals during manufacturing and before the start of use. The present invention relates to a simple and inexpensive manufacturing method for drug-containing reticular bodies used for.

[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.

It is also possible to make a plastic film containing a drug and punching a large number of small holes in order to use it as an underlay for air filters or refrigerator shelves that require the passage of cold air. It is rather soft, so it is difficult to mechanically puncture it, and it is also weak in strength.

Furthermore, in any of the above methods, no measures are taken to prevent the vaporizable chemical from escaping or being consumed during molding or before the start of use.

[Problems to be Solved by the Invention] The purpose of the present invention is to provide a simple structure for use in underlays of air filters, refrigerator shelves, etc., which causes little dissipation or consumption of chemicals during manufacturing and before use. The present invention provides a simple and inexpensive manufacturing method for the drug-containing reticular body used.

[Means for Solving the Problems] As a result of intensive studies to solve the above-mentioned problems, the inventors have completed the present invention.

That is, the present invention requires that when laminating a drug-impermeable sheet on both sides of a drug-containing sheet or film, a large number of small holes are formed after at least one layer is temporarily laminated on the drug-containing sheet or film in a peelable manner. This is a characteristic method for producing a drug-containing network.

The drug-containing sheet or film used in the present invention (hereinafter simply referred to as a sheet) includes paper, nonwoven fabric, open cell material,
This is a sheet in which a drug-impregnated resin sheet or the like that is compatible with the drug is impregnated with, mixed with (mixed lines), or coated with the drug.

The drug-impregnated 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. , ethylene-ethyl acrylate copolymer is preferred.

The drug-impermeable sheet used in the present invention includes polyamide resin, polyvinylidene chloride resin, polyvinyl chloride resin, saponified ethylene-vinyl acetate copolymer,
Examples include polyester resin, cellophane, metal foil, vapor deposited 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 used by impregnating, blending (mixing), coating, etc. on a drug-impregnated sheet. It may also be used as

Examples of the drug include fragrances, various repellents, deodorants, bactericides, fungicides, preservatives, insect repellents, rust preventives, rodent repellents, and the like.

1) There are natural fragrances and artificial fragrances, and natural fragrances include Jacora, Civet,
Vegetable fragrances consisting of animal fragrances such as kasdol 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 is.

Artificial fragrances include synthetic fragrances made of terpene compounds or aromatic compounds, isolated fragrances whose components are separated from essential oils mainly by fractional distillation, and other types of monomers.
Examples include blended fragrances prepared by mixing l1I fragrances, synthetic fragrances, natural fragrances, etc. to be suitable for practical use, and at least one of these may be used.

In addition, specific examples of the other drugs mentioned above include 2) Fresh Shiraimatsu (product name: manufactured by Shiraimatsu Shinyaku ■), Biodash (product name: manufactured by Osaka Kaitat ■, ■ manufactured by Tokyo Seikagaku Kenkyushin), Deodorants such as Anico (product name: Minato Sangyo ■); 3) Antifungal agents such as thiabendazole, binazine, α-bromucinnamaldehyde, etc.; 4) Alcohols, formalin, salicylic acid, taleosote, phenol, nitrofurazone. 5) Pyrethroid insect repellents such as synthetic pyrethrin-like compounds such as natural pyrethrin, binamine: vermethrin: Baberthrin (trade name: manufactured by Sumitomo Chemical); 6) DOT agent, BHC agent, drin agent, parathion agent, D
Insect repellents and insecticides such as DVP agents and PGP agents: 1) Naramycin (product name: Futanabe Seiyaku@), ramtalin (product name: Matsushita Electric Works), cotomycin (product name: Osaka Kasei Co., Ltd.), etc. Rodent repellents: 8) Dog and cat repellents such as lemongrass oil and tobacco tar: 9) Vaporization of organic amine salts such as dicyclohexylammonium nitrite and heterocyclic amines such as benzotriazole and methylbenzotriazole. Anti-fouling agents: 10) Food preservatives such as sorbic acid and dehydroacetic acid: 11) Antifouling agents such as phenylmercury acetate, phenylmercury oleate, copper naphthenate, copper oleate, etc.
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 manufacturing a drug-containing reticular body of the present invention, and FIG. 2 is a perspective view showing an example of the drug-containing reticular body manufactured by the manufacturing method of the present invention. It is.

In FIG. 1 and FIG. 2, 1 is a drug-containing network, 2
3 and 3' are drug-containing sheets, 3 and 3' are drug-impermeable sheets, 4 is a punching plate, and 5 is a pinch roll.

In Figure 1, fragrances, etc. are added to a polar group-containing ethylene copolymer such as ethylene-vinyl acetate copolymer or ethylene-ethyl acrylate copolymer, or a drug-impregnated resin such as polyvinyl chloride at room temperature or slightly warmed. The drug-containing sheet 2 impregnated in this state is fed out, and drug-impermeable sheets 3.3' made of saponified ethylene-vinyl acetate copolymer, polyester resin, polyamide resin, etc. are superimposed on both sides of the drug-containing sheet 2. The at least one layer of the drug-impermeable sheet 3 or 3' is temporarily laminated on the drug-containing sheet 2 in a peelable manner, and a large number of small holes are punched using a device such as a punching plate 4 to form a drug-impermeable sheet 3 or 3' as shown in FIG. A containing net-like body 1 is manufactured.

Note that the size and shape of the holes are not particularly limited as long as they can volatilize the vaporizable chemical.

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

Example: A polyethylene terephthalate film with a thickness of 0.01211W and paper with a basis weight of 509/end were made into a film with a thickness of 0.015am.
After extrusion lamination through a 300℃ melted web of low-density polyethylene, the deodorizer "Fresh Shiraimatsu" (product name: Shiraimatsu Shinyaku@) was sprinkled on the paper side at a rate of 10g per 1. An electrostatically adhesive plastic film called "Merasheet" (product name: Nippon Paper and Pulp Shoji Co., Ltd.) was pasted onto that surface.

50 small holes with a diameter of 5 ml per 100 ci in this laminate.
The deodorant-containing net-like body was obtained by making small holes, but the work of making small holes could be carried out without any problems.

When I peeled off this reticulated sheet and placed it on a shelf in a refrigerator with the rough side facing up, it continued to work for about a month without blocking the passage of cold air, eliminating the bad odors generated from foods in the refrigerator. It was effective in eliminating odors.

Furthermore, the juice of the fish meat was absorbed by the paper layer and was blocked by the polyethylene terephthalate film, so that it did not drip downward.

In addition, when the net-like material that had been stored without removing "Merasheet" was peeled off and used for practical use, the deodorizing ability was not lost, and we were able to confirm the deodorizing effect similar to the above. .

10 (10 liters) per piece of paper with a paper weight of 50a/rd.
I spread something sprayed with "Fresh Shiraimatsu" on the shelves of the refrigerator, but it blocked the passage of cold air and the temperature at the bottom of the refrigerator reached nearly 20 degrees Celsius.

Therefore, we tried to make 50 small holes with a diameter of 5 m per 100 cIi in this paper, but because the wet strength of the paper was weak, it was not possible to make the small holes neatly.

Even so, when the obtained mesh was spread on a shelf, a deodorizing effect was observed, but when it was stored for about six months without being used, no deodorizing effect was observed.

[Effects of the Invention] As mentioned above, drug-containing sheets have conventionally been soft and difficult to mechanically punch, but as in the manufacturing method of the present invention, they can be made to have relatively rigid properties. By laminating drug-impermeable sheets, processing becomes much easier.

In addition, since it is not subjected to heat history unlike conventional products, there is almost no dissipation or consumption of volatile chemicals such as fragrances.

Generally speaking, at least one layer of the drug-impermeable sheet is removably layered with a temporary 8% layer on the drug-impermeable sheet, so the drug vaporizes or exhibits its effect only after the drug-impermeable sheet is peeled off. It has various functions and effects.

[Brief explanation of drawings]

FIG. 1 is a schematic main process diagram showing an example of the manufacturing method of the present invention, and FIG. 2 is a perspective view showing an example of a drug-containing reticular body manufactured by the manufacturing method of the present invention. 1... Drug-containing reticular body, 2... Drug-containing sheet,
3.3'...Drug-impermeable sheet, 4...Punching plate, 5...Vintirol.

Claims (1)

[Claims] 1. When laminating a drug-impermeable sheet on both sides of a drug-containing sheet or film, at least one layer is temporarily laminated on the drug-containing sheet or film in a peelable manner, and then a large number of small holes are formed. A method for producing a drug-containing reticular body, which is characterized in that it can be opened. 2. The method for producing a drug-containing network according to claim 1, wherein the drug-impermeable sheet is a transparent plastic sheet. 3. The method for producing a drug-containing network according to claim 1 or 2, wherein the drug is a vaporizable drug. 4. A patent claim in which the vaporizable chemical is at least one type of chemical 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 3.