JPH0536684Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Industrial application field) The invention is useful as a packaging material for food for home and commercial use, and as a packaging material for waste such as food waste that releases bad habits. The present invention relates to a wrapping film, particularly a wrapping film containing a deodorizing agent.

(Prior technology) Films made from synthetic resins such as vinyl chloride and vinylidene chloride are used as household food packaging materials.
Alternatively, aluminum foil is commonly used.

On the other hand, in order to gradually release odorous substances such as fragrances over a long period of time, a technology was developed to incorporate fragrances into plastic film.
No. 60-141233. Among these, the former is a film containing a fragrance, and the latter is a laminated structure consisting of at least two layers: a resin layer containing a fragrance and a fragrance-permeable sheet layer.

(Problems to be Solved by the Invention) Conventional wrapping films are made of resin and are monofunctional for simply wrapping foods and the like.

Therefore, it is necessary to prevent odors and odors from occurring from the packaged items themselves, such as food and garbage, or to prevent external odors in refrigerators, toilets, etc. from transferring to the packaged items such as food, wall hangings, and ornaments. Can not. These foul-smelling and unpleasant-smelling substances are caused by organic and inorganic compounds containing nitrogen, sulfur, halogen, etc. in their molecules, such as ammonia, amines, mercaptans, aldehydes, and fatty acids. When attempting to alleviate the malodors and unpleasant odors emitted by these substances using the above-mentioned aromatic plastic sheets, there are problems such as the strength and cost of the wrapping film, and the transfer of scent to the packaged items. This is not an adequate response.

The present invention is an attempt to solve the above-mentioned problems, and the purpose of the present invention is to easily prevent the characteristic odors and bad odors emitted from packaged items such as foods by using a wrapping film that also has a deodorizing effect. It is something.

[Structure of the idea]

(Means for Solving the Problems) To summarize the present invention, the present invention provides a deodorizing property characterized by comprising at least a resin layer containing a deodorizing agent and a base material layer not containing a deodorizing agent. The present invention relates to a wrapping film that has excellent properties.

Hereinafter, the configuration and embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a partially enlarged vertical sectional view of a deodorizing wrapping film 1 according to an embodiment of the present invention.

As shown in the figure, the wrapping film 1 of the present invention includes a resin layer 2 containing at least a deodorizing agent 4.
and a base material layer 3 that does not contain (does not contain) a deodorizing agent.

The present invention employs the above-mentioned laminated structure in connection with the use of a wrapping film, that is, in connection with the requirement that items to be packaged must be wrapped safely and securely with sufficient strength. If the resin layer 2 is a single layer containing a deodorizing agent, the resin layer becomes porous due to the dispersion of the deodorizing agent, which poses problems in terms of strength, and in the case of packaged items with a high moisture content, moisture will be absorbed by the deodorizing agent. , which may be absorbed and reduce the deodorizing ability, so the present invention adopts a laminated structure with a densified layer that does not contain a deodorizing agent.

When the resin matrix of the resin layer 2 containing the deodorizing agent or the base layer 3 not containing the deodorizing agent is composed of a resin, the resin may be polyethylene, polyvinyl chloride, or polychloride, which are commonly used as wrapping agents. Any material such as vinylidene can be used as long as it does not interfere with the wrapping function.

Furthermore, when the dense base material layer 3 that does not contain a deodorizing agent is made of a material other than resin, it goes without saying that metal foil, such as aluminum foil, may be used. A material made of a resin layer, a material made of a resin layer and a metal foil layer, etc. may be used.

The deodorizer 4 contained in the deodorizer-containing resin layer 2 mainly includes activated carbon using physical/chemical adsorption functions, various zeolites, monovalent iron compounds [for example, iron ascorbate (), tannins, etc.]. iron acid], and esters used in liquid form using chemical reactions (fumaric acid ester, crotonic acid ester, unsaturated carboxylic acid ester, etc.),
There are no particular restrictions on the material as long as it has a deodorizing function, such as aldehydes (glutaraldehyde, β-ethoxypropionaldehyde, crotonaldehyde, etc.), chlorophylls, and hydrogen peroxide. These deodorizing agents 4 are dispersed in the resin matrix of the deodorant-containing resin layer 2 as shown in the figure, and the amount of dispersion is determined as appropriate. In the case of a liquid deodorizer, the liquid deodorizer itself may be kneaded into the resin, or it may be adsorbed onto a solid adsorbent and dispersed, or the resin matrix may have a coupling function with the liquid deodorizer. It may also be dispersed in a substance that has been applied to The deodorizer 4 on the surface directly deodorizes odors, but the deodorizer 4 dispersed inside the resin matrix deodorizes odors that permeate from the deodorizer and resin on the surface.

The layer structure method of the deodorizing agent-containing resin layer 2 and the deodorizing agent-free base material layer 3, that is, the lamination method, can be a conventional dry lamination method, extrusion coating method,
Various coating methods, a T-die method, a multilayer inflation method using coextrusion, etc. may be employed.

Further, in order to form the deodorizing agent-containing resin layer 2 itself, the deodorizing agent and the resin component described above may be mixed in accordance with a conventional method, and then formed into a film. For example, as a mixing method, the deodorizing agent powder and the resin pellets may be mixed using a Henschel mixer, a Banbury mixer, a kneader, an extruder, etc., or the deodorizing agent is added to a resin solution and mixed with stirring.

Note that FIG. 1 shows a resin layer 2 containing a deodorizing agent.
Although the boundary between the layer 3 and the base material layer 3 that does not contain a deodorizing agent is clearly separated as if they were laminated together, the wrapping film of the present invention is limited to such a layer. It's not something you can do.
For example, if the same kind of resin matrices are used for 2 and 3, and they are laminated by multilayer inflation using coextrusion, the boundaries will not be clear as shown in Figure 1 because they will fuse with each other. The present invention also includes this type of device. In this case, since the resin matrices are the same, the resin matrices fuse with each other, resulting in a layered structure in which the dispersed concentration of the deodorizer is high and low, or where it is not dispersed.

FIG. 2 is a partial plan view of a deodorizing wrapping film 1 according to another embodiment of the present invention. This wrapping film 1 has a resin layer 2 containing a deodorizing agent with a constant width provided on both ends of a dense base material layer 3 not containing a deodorizing agent. With this configuration, when a wrapping film is wound around a core rod or the like and the product is pulled out for use, blocking between the wrapped films can be suppressed, similar to that shown in Fig. 1. , compared to the one shown in FIG. 1, it is economical because the amount of deodorizing agent used can be minimized.

[Effect of idea]

The deodorizing wrapping film of the present invention, which is composed of at least a resin layer containing a deodorizing agent and a base layer not containing a deodorizing agent, can effectively deodorize the odors and malodors of the packaged item itself or its surroundings. It is also preferable in terms of environmental hygiene. In addition, when the wound film is pulled out and used, blocking of the film is suppressed, making it easy to use.
Furthermore, the deodorizing wrapping film of the present invention is useful as a substitute for a deodorizing agent for refrigerators when packages are stored in a refrigerator or the like.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged vertical sectional view of a wrapping film according to an embodiment of the present invention, and FIG. 2 is a partial plan view of a wrapping film according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Wrapping film, 2...Resin layer containing a deodorizer, 3...Base layer not containing a deodorizer, 4...Deodorant particles.

Claims (1)

[Claims for Utility Model Registration] 1. A product with excellent deodorizing properties characterized by comprising a resin layer made of a resin containing at least a deodorizing agent and a base material layer made of a resin or metal foil that does not contain a deodorizing agent. Film for wrapping. 2. The wrapping film according to claim 1, wherein the deodorizing agent-containing resin layer and the deodorizing agent-free base layer are constructed using the same resin matrix. 3. The wrapping film according to claim 1, wherein the deodorizing agent-containing resin layer and the deodorizing agent-free base layer are constructed using different types of resin matrices.