JP2007038576A - Laminate and container using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging material which self-removes an odor, generated in a container, while having high barrier performance, and which enables a bag to be manufactured by conventionally and generally performed heat sealing, and also to provide a container with an odor eliminating function, which is constituted by using the packaging material. <P>SOLUTION: In a laminate, one of surfaces layers is mainly composed of a low-density synthetic resin which allows the easy transmission of an odor component; the other surface is mainly composed of a synthetic resin with a melting point obviously higher than that of the above surface layer; at least an intermediate layer is aluminum foil; and a substance with an odor eliminating function is mixed at least into the low-density synthetic resin. The container is composed of the laminate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a packaging material or container that contains and seals an article, and in particular, prevents a bad odor generated from the article inside, and also prevents a liquid such as water or alcohol, a gas phase thereof, or a gas such as air. The present invention relates to a packaging material or a container having a light shielding property or a light shielding property.

  Conventionally, there is a container formed in a bag shape for the purpose of protecting the contents, and it is widely used in various applications. As a method for forming such a container into a bag shape, a so-called bag making method called heat sealing is generally used. In addition, for example, by preventing the movement of gas or moisture such as air and oxygen inside and outside the container or moisture, the containers prevent oxidation, solidification, dissolution, etc. of the contents, or by shielding the contents from light. It is configured to protect the contents from alteration and quality degradation. They have been devised appropriately for the material and configuration of containers that are appropriately selected, and have achieved high barrier performance.

  However, due to its high barrier performance, when a strange odor is generated from the article as the contents, it does not come out of the pouch or the container and accumulates inside, and there is a possibility that the user may feel uncomfortable at the time of opening. Also, especially in cosmetics, foundation refill containers, auto eyeliner cartridges, sample containers, cosmetic brushes, etc. are often sealed in pouches and are often put on the market. There are problems that amine-like odors from different resin materials have a nose, feel uncomfortable, shift to the contents of cosmetics, and are not used. Even in conventional containers, there has been a packaging material that has a deodorizing function by some method, as in the technique disclosed in Japanese Patent Laid-Open No. 8-258229 (Patent Document 1). Many of them are intended to have a breathability or to be used in the form of a sheet, and none have a high barrier property and an odor eliminating effect for removing the odor inside the container.

JP-A-8-258229

  The present invention has been made in view of the problems as described above, and a laminated body capable of removing the odor generated in the container by itself while having a high barrier property, a pouch using the laminated body, and the like. And a wide-mouthed container using the laminated body as a lid.

In order to solve the above problems, the present invention adopts a laminated film in which an intermediate layer is disposed between an inner surface layer made of a low-density synthetic resin film and an outer surface layer made of a synthetic resin film having a high melting point. In the present invention, a substance having a deodorizing function is blended in the inner surface layer. The substance having a deodorizing function is one or more substances selected from zeolite, metal-supported zeolite, zinc oxide, titanium oxide, and activated carbon.
In addition, this film is one or more films selected from low density polyethylene, linear low density polyethylene, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, and unstretched polypropylene. To do.

  Further, using two laminates, heat-sealing the four corners so that the inner surface layer of each laminate is inside, and the desired article is a bag-like container in the seal, and the desired article Is a cosmetic container or cosmetic accessory.

   Furthermore, the container is characterized by being a container fused and sealed to an opening of a container mainly made of metal or thick resin with the inner surface layer of the laminate facing inward.

  According to this invention, it is possible to obtain a laminate having a high deodorizing effect while ensuring a high level of barrier properties at a low production cost by using almost the same production process as that of the prior art. If you put a cosmetic container or cosmetic accessory inside, absorb the amine-like odor generated from the cosmetic container etc. well, and the user will not feel distrust when opening the pouch bag, etc. Can be provided. Furthermore, the laminate can be applied to foods having an excellent deodorizing function by fusing and sealing the laminated body to the opening of the wide-mouth container and the inner surface layer facing inward.

  Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a pouch container (2) configured using the laminate (1) of the present invention and containing a cosmetic plastic bottle therein, and FIG. 2 is a laminate of the present invention. It is sectional drawing which shows the structure of (1). FIG. 3 is a cross-sectional view showing a state in which the laminate (1) of the present invention is fused and sealed to the opening surface of a synthetic resin wide-mouth container.

  As shown in FIG. 1, a preferred embodiment of a pouch container (2) constructed using the laminate (1) of the present invention is such that the inner surface layers of two laminates (1) to be described later are stacked. In addition, the objects to be accommodated (3) are arranged between them, and the periphery of the two stacked laminates (1) is heat-sealed and sealed in a bag shape. Here, the container (3) is placed in a state where a cosmetic container with a cap attached to a bottle-shaped cosmetic container body contains cosmetics. Even when an amine-like odor is generated from the cap or the container body, the off-flavor is absorbed by the substance having a deodorizing function contained in the inner surface layer. Here, the cosmetic container is enclosed in a pouch, but the present invention is not limited to this, and a desired article can be accommodated.

  The upper and lower laminates (1) forming the pouch container (2) shown in FIG. 1 have an outer surface layer (4) that forms a surface layer facing outward when the surface layer is packaged, and an inner surface layer (5). Compared with a synthetic resin having a clearer melting point as a main material. In addition, the inner surface layer (5), which is the inner surface layer of the surface layer when packaged, is a low-density synthetic resin film that easily transmits odor components, and the outer surface layer (4). A synthetic resin film having a clearly lower melting point is used as a main material. The synthetic resin film forming the inner surface layer (5) is blended with a substance having a deodorizing function. And at least the intermediate layer (6) is composed of a stretched aluminum, and is configured such that mass transfer across this layer hardly occurs by interposing this non-porous aluminum foil-like layer. In addition, the light shielding property is secured, and it is possible to obtain a high barrier property having an excellent shielding property. FIG. 2 shows the laminate (1) having this structure.

  The outer surface layer (4) is intended to protect the aluminum layer forming the intermediate layer (6) and to be able to carry a display body such as an advertisement, and guarantees these protective effects and display properties. In order to do so, it may be any synthetic resin that has a clearly higher melting point than the inner surface layer (5), and is not particularly limited, but is preferably a synthetic resin suitably selected from conventionally known polyesters, more specifically Polyethylene terephthalate can be suitably used.

  The inner surface layer (5) is blended into the inner surface layer (5) while allowing the odor component derived from the contents contained in the pouch container (2) or the odor component derived from the substance constituting the pouch container (2) to pass therethrough. The deodorant (7) is used to remove odor in the pouch container (2). The inner surface layer (5) is composed mainly of a synthetic resin whose melting point is clearly lower than that of the synthetic resin forming the outer surface layer (4), and thereby the melting point of the synthetic resin forming the outer surface layer (4). The heat sealing is possible by applying heat from the outer surface (4) side so that the temperature is lower than the melting point of the synthetic resin forming the inner surface layer.

  Further, as the main component synthetic resin forming the inner surface layer (5), a synthetic resin that easily transmits the odor component is selected. Many of such synthetic resins are relatively low density and soft, and many of them have a relatively low melting point, preferably a synthetic resin having a density of 0.95 or less, more preferably low density polyethylene. One or two or more films selected from linear low density polyethylene, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, and unstretched polypropylene are used. By using such a synthetic resin, the odorous component easily penetrates into the inside of the resin, and the odorous component can reach not only the resin surface but also the deodorant present in the inside. Compared to, the deodorizing effect can be increased at each stage. Further, in order to have a sufficient deodorizing effect, the thickness of the inner surface layer (5) is preferably 30 to 100 μm.

  Further, the deodorant (7) blended in the synthetic resin constituting the main component of the inner surface layer (5) is blended and kneaded at a temperature near the melting point of the resin. The temperature is 150 to 270 ° C. Therefore, the deodorant (7) must be one that does not impair the deodorizing effect even when exposed to such a temperature, but is not particularly limited otherwise. Absent. As such a deodorant (7), an inorganic substance having a deodorizing function is suitable, and examples thereof include zeolite, metal-supported zeolite, zinc oxide, titanium oxide, activated carbon and the like. Depending on the above, at least one substance appropriately selected from these can be used alone or in combination. These inorganic substances are blended into a powdery synthetic resin which is the main component of the inner surface layer (5). The particle size and blending amount of the blended inorganic powder is preferably 1 to 20 μm, 5 To 50 mass%. By using such a particle size and blending amount, a special kneader or a molding machine is not required when kneading into a synthetic resin, and it can be adequately handled by conventional equipment, and is layered. The resin molded in this manner can also have an appropriate strength, flexibility and surface smoothness, and a sufficient deodorizing effect.

The laminate of the present invention can be widely used as a sheet for preventing off-flavors.
Further, in combination with other containers, for example, as shown in FIG. 3, the inner surface layer (5) of the laminate (1) of the present invention is directed inward at the opening of the wide-mouthed container (8) made of thick resin. The laminate can be fused and sealed to the opening to absorb the off-flavor generated from the contents and enable long-term storage.

A laminate was prepared under the following conditions.
A laminate was prepared with a low density polyethylene film having a thickness of 50 μm containing 40% by mass of hydrophobic zeolite as an inner surface layer, a polyethylene terephthalate film having a thickness of 12 μm as an outer surface layer, and an aluminum film having a thickness of 7 μm as an intermediate layer. This laminate can be easily produced by a general laminate film producing method, and has excellent stability.

  Using the two laminates prepared in Example 1 and placing the sample lotion inside, heat-sealing the four corners so that the inner surface layer of each laminate is inside, a cosmetic pouch container is formed. Created. Comparing the comparative example in which the inner surface layer does not contain hydrophobic zeolite and the unpleasant odor state after 3 weeks, the pouch-shaped bag-shaped container of Example 2 did not feel any unpleasant odor.

Sectional view of a pouch container made using the laminate of the invention Sectional drawing which shows the structure of the laminated body of the said invention Sectional drawing which shows the state which affixed the laminated body of the said invention on the wide mouth container

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laminated body 2 Pouch container 3 Contained object 4 Outer surface layer 5 Inner surface layer 6 Middle layer 7 Deodorant 8 Wide-mouthed container

Claims (6)

  In a laminated film in which an intermediate layer is disposed between an inner surface layer made of a synthetic resin film having a low density and an outer surface layer made of a synthetic resin film having a high melting point, a substance having a deodorizing function was blended in the inner surface layer. A laminate characterized by the above.   The laminate according to claim 1, wherein the substance having a deodorizing function is one or more substances selected from zeolite, metal-supported zeolite, zinc oxide, titanium oxide, and activated carbon.   The low-density synthetic resin film is one or more films selected from low-density polyethylene, linear low-density polyethylene, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, and unstretched polypropylene. The laminate according to claim 1 or 2, wherein:   Using two laminates in which an intermediate layer is arranged between an inner surface layer composed of a low density synthetic resin film containing a substance having a deodorizing function and an outer surface layer composed of a synthetic resin film having a high melting point A bag-like container in which four corners are heat-sealed so that the inner surface layer of each laminate is on the inside, and a desired article is placed in the seal.   The bag-like container according to claim 4, wherein the desired article is a cosmetic container or a cosmetic accessory.   A laminate in which an intermediate layer is disposed between an inner surface layer composed of a low-density synthetic resin film containing a substance having a deodorizing function and an outer surface layer composed of a synthetic resin film having a high melting point is made of metal or thick A container characterized by being fused and sealed at an opening of a container mainly made of resin, with the inner surface layer of the laminated body facing inward.

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