TW201900422A - Cover material and package - Google Patents

Abstract

This invention provides a cover material which may stably carry out the function of releasing aroma from an article for a certain period of time or the like when the article such as an aromatic accommodated in a container is used. The cover material 3 is applied to a container 2 for accommodating an article C, wherein the article C functions as expected by gas exchange between an accommodating space and an external space. The cover material is characterized by having an outer layer portion 3a and an inner layer portion 3b, wherein the outer layer portion 3a has a gas blocking property; and the inner layer portion 3b is detachably laminated on the inner side of the outer layer portion and has a gas permeability. The inner layer portion has a sealing layer 35 and an adhesive layer 34, wherein the sealing layer 35 is thermally welded to an opening edge portion 2a of the container; and the adhesive layer 34 is disposed on the outer side of the sealing layer, and the sealing layer is adhered to the outer layer portion. An average density of the inner layer portion is 0.91 to 0.93 g/cm<SP>3</SP>.

Description

   Cover material and packaging   

The present invention relates to a cover material, and more specifically, to a cover material for a container for accommodating articles. The aforementioned articles are, for example, similar to fragrances, deodorants, hygroscopic agents, etc. Exchanging gas with the external space to perform the functions of releasing aroma, deodorization, moisture absorption, etc.

In addition, the present invention relates to a packaging body formed by packaging the above-mentioned lid material and container with articles such as fragrance.

For example, in the case of packaging liquid fragrances, when the fragrances are not used, they need to be kept in a sealed state. On the other hand, when they are used, the fragrances should not be allowed to leak out at the same time in the storage space and the external space Gas exchange is carried out between them, and the volatile aromatic components need to be released to the external space.

Known Patent Document 1 describes a lid material used in combination with a plastic molded container with a flange for packaging such a liquid fragrance.

The cover material is formed by laminating a base film, a barrier layer, a buffer layer, an adhesive layer, and a sealing layer in order from the outside. The next layer is composed of an extruded layer of polyethylene resin. The sealing layer is made of a polyethylene resin film. When using a fragrance, the cover material is peeled off at the interface between the buffer layer and the adhesive layer, and the gas is exchanged between the storage space in the container and the external space through the adhesive layer and the sealing layer remaining on the container side, so that the fragrance is aromatic The ingredients are released into the outer space.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 5257425

In the case of the invention of Patent Document 1, although a buffer layer composed of a predetermined film is placed between the barrier layer and the sealing layer of the cover material, thereby improving the content resistance of the cover material, the fragrance of the content is used. At that time, the aspect of controlling the released aroma stably for a certain period of time was not considered.

The present invention has been conceived in view of the above-mentioned problems, and an object thereof is to provide a cover material which can stably exert fragrance released from the same articles for a certain period of time when using articles such as fragrances contained in a container. And other functions.

To achieve the above object, the present invention includes the following aspects.

(1) A cover material, which is a container for accommodating articles, the aforementioned articles perform a predetermined function by exchanging gas between the accommodating space and the external space, and are characterized by having an outer layer portion and an inner layer portion; The outer layer portion has gas barrier properties; the inner layer portion is releasably laminated on the inner side of the outer layer portion and has air permeability; the inner layer portion has a sealing layer and an adhesive layer; the sealing layer is thermally welded to the opening edge of the container The adhesive layer is disposed on the outer side of the sealing layer and adheres the sealing layer to the outer layer portion. The average density of the inner layer portion is 0.91 to 0.93 g / cm ³ .

(2) The cover material according to the above (1), wherein the sealing layer is made of a polyolefin resin film; and the adhesive layer is made of a polyolefin resin extruded layer.

(3) The cover material according to the above (1) or (2), wherein the outer layer portion has a base material layer, a barrier layer, and a buffer layer which are sequentially laminated from the outside.

(4) The cover material according to the above (3), wherein the buffer layer is made of a polyamide resin film, and the polyamide resin film has a corona formed only on the side of the barrier layer on both sides. Processing layer.

(5) The cover material according to any one of (1) to (4) above, wherein a peel strength between the outer layer portion and the inner layer portion is 0.4 to 1.5 N / 15 mm.

(6) A packaging body comprising: a container and a cover material for accommodating articles; the foregoing articles perform a predetermined function by exchanging gas between the accommodating space and an external space; the cover material is thermally fused to the container The opening edge portion covers the opening of the container, and is characterized in that the cover material is composed of the cover material described in any one of (1) to (5) above.

(7) The package according to the above (6), wherein the article is a fragrance, a deodorant or a hygroscopic agent.

The cover material of (1) above is thermally welded to the opening edge of the container so as to cover the opening of the container that contains articles that perform a predetermined function by gas exchange between the storage space and the external space, thereby constituting Packages with the same items in a sealed package. When an article is used, the outer layer of the cover material is peeled and removed, and the gas is exchanged between the storage space in the container and the outer space through the inner layer portion remaining on the container side, and the article stored in the container is displayed. Defined functions.

In addition, according to the cover material (1) above, the inner layer portion has a sealing layer and an adhesive layer. By setting the average density to 0.91 to 0.93 g / cm ³ , the inner layer portion can be stably maintained for a certain period of time. The speed of the gas exchange between the containment space and the external space can further stabilize the function of the items contained in the container within a certain period.

According to the cover material of (2) above, since the sealing layer is composed of a polyolefin resin film, and the adhesive layer is composed of a polyolefin resin extruded layer, it is easy to process, has versatility, and can reduce costs.

According to the cover material of (3) above, when the article is in an unused sealed packaging state, a high gas barrier property can be obtained by the barrier layer of the outer layer portion. In addition, even if the content of the article is a fragrance or the like, the outer layer is used. The internal buffer layer can effectively suppress the deterioration of the barrier layer or the occurrence of interlayer peeling.

According to the cover material of (4) above, since the buffer layer of the outer layer portion is made of a polyurethane resin film that is corona-treated only on the side of the barrier layer side, the pinhole resistance of the inner layer portion is improved. When the outer layer portion and the inner layer portion of the cover material are peeled off, the outer layer portion becomes difficult to crack, and the peelability is improved.

According to the cover material of (5), since the peel strength between the outer layer portion and the inner layer portion is 0.4 to 1.5 N / 15 mm, there is no risk of accidental peeling when it is not opened, and at the same time, it has excellent sealing It is also easy to peel off the outer layer part at the time of unsealing.

According to the package of (6), when the outer layer portion of the cover material is peeled off and used, the inner layer portion of the cover material having the structure as described above can be stably maintained in the storage space and the outside for a certain period of time. The speed of gas exchange between spaces can further stably exert the function of the articles contained in the container within a certain period.

According to the package of (7) above, the fragrance, deodorant or hygroscopic agent can be packaged so as to stably exert the functions of releasing aroma, deodorant or moisture absorption within a certain period.

(1) ‧‧‧Package

(2) ‧‧‧container

(2a) ‧‧‧ flange (open edge)

(3) ‧‧‧ Cover material

(3a) ‧‧‧Outer Department

(3b) ‧‧‧Inner Department

(31) ‧‧‧Substrate layer

(32) ‧‧‧Barrier

(33) ‧‧‧Buffer layer

(34) ‧‧‧Layer

(35) ‧‧‧Sealing layer

(C) ‧‧‧ Items

[FIG. 1] A vertical cross-sectional view showing an outline of the entire package according to the embodiment of the present invention.

[Fig. 2] A partially enlarged vertical sectional view showing the same package.

[Fig. 3] A partially enlarged vertical cross-sectional view showing the state of the same package after opening.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

Fig. 1 shows the overall outline of a package according to the present invention.

The package (1) shown in the figure is provided with a container (2) and a cover material (3); the container (2) contains an article (C); and the cover material (3) is thermally welded to the container (2) The opening edge portion (2a) covers the opening of the container (2).

The article (C) contained in the container (2) as the contents performs a predetermined function by exchanging gas between the containing space and the external space. Specifically, examples include fragrance, deodorant Agent, hygroscopic agent.

The container (2) is made of a cup-shaped resin molded body, and has a horizontal flange (2a) at the upper opening edge portion. However, the shape of the container is not limited to that shown in the figure, and can be appropriately changed.

As the forming material of the container (2), a single-layer sheet or a composite sheet of two or more layers can be used. The container (2) shown in Figs. 2 and 3 is composed of a two-layered composite sheet; the outer layer (21) is composed of a heat-resistant material such as a polyvinyl chloride resin (PVC) film. ; The inner layer (22) is made of a hot-melt material such as a polyethylene resin (PE) film. In addition, between the outer layer (21) and the inner layer (22), a barrier layer made of, for example, a metal foil such as aluminum foil can also be interposed, so that the barrier property of the container (2) can be improved.

The cover material (3) includes an outer layer portion (3a) having a gas barrier property, and an inner layer portion (3b) which is detachably laminated inside the outer layer portion (3a) and has air permeability.

Although the illustration is omitted, the cover material (3) is integrally provided with a protruding piece that protrudes outward in the radial direction from one portion of its peripheral edge portion.

The outer layer portion (3a) of the cover material (3) has a base material layer (31), a barrier layer (32), and a buffer layer (33) which are sequentially laminated from the outside (above Figs. 2 and 3).

The base material layer (31) is composed of the outer surface of the cover material (3), for example, a polyethylene terephthalate resin (PET) film, a polybutylene terephthalate resin (PBT) film, It is composed of a polyester resin film such as ethylene naphthalate resin (PEN) film. The thickness of the base material layer (31) is set to about 10 to 50 μm.

The barrier layer (32) is used for imparting barrier properties to the cover material (3) in an unopened state of the article (C) not using the contents, and is composed of a metal foil such as an aluminum foil or a stainless steel (SUS) foil. The thickness of the barrier layer (32) is set to about 5 to 50 μm.

The buffer layer (33), for example, prevents the barrier layer (32) from deteriorating due to a volatile aromatic component or the like when the content item (C) is a fragrance or the like. 34) Interlayer peeling occurs between layers. The buffer layer (33) is preferably made of a polyamide resin film. The polyamide resin film constituting the buffer layer (33) preferably has a corona treatment layer (not shown) formed on only the side of the barrier layer (32) on both sides, thereby improving the inner layer portion (3b). In addition, when the outer layer portion (3a) of the cover material (3) is peeled and unsealed, the outer layer portion (3a) becomes difficult to crack and the peelability is improved. The thickness of the buffer layer (33) is set to about 10 to 40 μm.

The inner layer part (3b) of the cover material (3) has: a sealing layer (35) and an adhesive layer (34); the aforementioned sealing layer (35) is a flange (2a) thermally welded to the container (2); The adhesive layer (34) is disposed outside the sealing layer (35) (above Figs. 2 and 3) and attaches the sealing layer (35) to the buffer layer (33) of the outer layer portion (3a).

The sealing layer (35) is made of a polyolefin resin film such as a polyethylene resin (PE) film, an ethylene-vinyl acetate copolymer resin (EVA) film, and the like. The adhesive layer (34) is composed of a polyolefin resin extruded layer such as polyethylene resin (PE), ethylene-vinyl acetate copolymer resin (EVA), and the like.

Average density based bonding layer (34) and a sealing layer (35) of the inner portion and then (3b) of the set to 0.91 ~ 0.93g / cm ^3. Here, the "average density" of the inner layer portion (3b) refers to a value calculated by the density of each layer (35) (34) measured according to the D method (density gradient tube method) specified in JIS K7112 (1999). Specifically, it is as follows.

D ^OG = (D ^AD × t ^AD + D ^SL × t ^SL ) / (t ^AD + t ^SL )

D ^OG : average density of Out Gassing

D ^AD : Density of Adhesive

t ^AD : thickness of the adhesive layer

D ^SL : density of Sealant

t ^SL : thickness of sealing layer

The melting point of the polyolefin resin constituting the adhesive layer (34) is preferably 5 to 25 ° C higher than the melting point of the polyolefin resin constituting the sealing layer (35). Here, the "melting point" refers to a value measured in accordance with a method for measuring the melting temperature of plastics specified in JIS K7121 (2012). When the melting point difference is 5 ° C or more, when the cover material (3) is thermally welded to the flange (2a) of the container (2), the cover material (3) is continued from the sealing layer (35), and the cover material (3) is not shifted during the subsequent bonding. In addition, since the melting point difference is within 25 ° C., the buffer layer (33) does not melt, so it does not peel off from the target position.

The thickness of the sealing layer (35) is preferably about 30 to 80 μm, and the thickness of the adhesive layer (34) is preferably about 20 μm or less. Further, the total thickness of the inner layer portion (3b) of the bonding sealing layer (35) and the bonding layer (34) is preferably 35 μm to 80 μm. The speed of gas exchange can be controlled by the thickness of the inner layer (3b). By setting the thickness within the above-mentioned range, for example, when the article (C) is a fragrance, it can release a moderate aroma during use. In addition, It can be consumed while the fragrance of the contents does not deteriorate.

The method of thermally welding the lid material (3) to the flange (2a) of the container (2) is not particularly limited, and it is desirable to use a knurled seal to obtain a high sealing strength.

The cover material (3) is, for example, lifted by holding the grip portion so as to be between the outer layer portion (3a) and the inner layer portion (3b), that is, between the buffer layer (33) and the adhesive layer (34). Interface. Thereby, the outer layer portion (3a) is separated from the container (2), and only the inner layer portion (3b) remains on the container (2) side. The inner space portion (3b), the storage space in the container (2) and the outside Gas is exchanged between the spaces, and items such as the fragrance of the contents function to release fragrance and the like.

The peel strength between the outer layer portion (3a) and the inner layer portion (3b) is preferably 0.4 to 1.5 N / 15 mm, and more preferably 0.6 to 1.3 N / 15 mm. If the peel strength is less than 0.4N / 15mm, the outer layer portion (3a) may be accidentally peeled when unopened. On the other hand, if the peel strength exceeds 1.5N / 15mm, it is difficult to peel off the outer layer portion when unsealed ( 3a). Here, the "peeling strength" refers to a value measured under conditions of a peeling condition of 100 mm / min between samples having a width of 15 mm followed by a T-shape.

[Example]

Next, specific embodiments of the present invention will be described, but the present invention is not limited to these embodiments.

(Making of cover material)

On the side of one side of the aluminum foil (= barrier layer) made of AlN30H-O specified in JIS H4160 (2006) and having a thickness of 9 μm, a two-liquid curable polyester urethane resin adhesive was used. Polyethylene terephthalate resin (PET) film (= substrate layer) is dry laminated.

Next, a corona-treated polyimide resin film having a thickness of 15 μm was applied to only one side of the aluminum foil using a two-component curing type polyurethane urethane resin adhesive. (= Buffer layer) dry-laminated so that its corona-treated layer faces the aluminum foil.

On the side of the polyamide resin film side in the thus-obtained laminate (= outer layer portion), a polyethylene resin (PE) film (= sealing) having a thickness of 50 μm was extruded and laminated using polyethylene resin (PE). Layer). The thickness of the polyethylene resin extrusion layer (= adhesive layer) was 15 μm. Here, the polyethylene resin film and the polyethylene resin extruded layer have a density and a melt flow rate (MFR) shown in Table 1 below, so that the laminated portion of the polyethylene resin film and the polyethylene resin extruded layer (= inside) The average density of the layer portion) is shown in Table 1.

The five types of laminates obtained as described above were cut into a substantially circular shape with a diameter of 45 mm, and the cover materials of Examples 1 to 3 and Comparative Examples 1 and 2 were produced.

(Production of packaging body)

Next, the inner layer is made of polyethylene resin (PE), and the outer layer is made of polyvinyl chloride (PVC). Several cup-shaped containers (outer diameter of flange 40mm) are prepared as shown in Figure 1. , Inner diameter 35mm), each container was filled with 3cc of liquid fragrance. Aromatics are A, B and C.

Next, the lids of Examples 1 to 3 and Comparative Examples 1 and 2 were placed on the flanges of the containers containing the fragrances A, B, and C with the sealing layer facing the flanges, and the two were thermally welded. The heat welding is performed by a knurled sealing device under the conditions of a heating temperature of 160 ° C, a pressure of 0.2 MPa, and a heating and pressing time of 1 second.

By the above steps, the packages of Examples 1 to 3 and Comparative Examples 1 and 2 were produced.

(Verification of change in fragrance transmittance)

The cover materials of the packaging bodies of Examples 1 to 3 and Comparative Examples 1 and 2 were peeled between the polyamide resin film and the polyethylene resin extrusion layer, and only the polyethylene resin extrusion layer and the polyethylene resin film remained in the container side. In this state, keep it for one month at room temperature in this state.

During storage, the weight of each package was measured every week, and the difference from the weight before storage was calculated to confirm the change in the transmittance of the fragrance. In addition, if the change in the transmittance remains stable within one month, it is "○", and if it is unstable, it is "×". The results are shown in Table 2 below.

As shown in Table 2, in the packages of Examples 1 and 2, regardless of the type of fragrance, the change in transmittance was found to be stable for one month, and the released fragrance was stable. In addition, in the case of the package of Example 3, the change in transmittance with respect to a part of the fragrance remained almost stable for one month. On the other hand, in the packages of Comparative Examples 1 and 2, the change in transmittance was not stable.

[Industrial availability]

The present invention can be suitably used as a packaging material such as a fragrance, a deodorant, a hygroscopic agent, and the like.

Claims (7)

A cover material is a container for accommodating articles. The aforementioned articles perform a predetermined function by exchanging gas between an accommodating space and an external space, and are characterized by having an outer layer portion and an inner layer portion. The outer layer portion has The gas barrier property; the inner layer portion is releasably laminated on the inner side of the outer layer portion and has air permeability; the inner layer portion has a sealing layer and an adhesive layer; the sealing layer is thermally welded to the opening edge portion of the container; The next layer is arranged on the outer side of the sealing layer and the sealing layer is adhered to the outer layer portion; the average density of the inner layer portion is 0.91 to 0.93 g / cm ³ .     The cover material according to item 1 of the patent application range, wherein the sealing layer is composed of a polyolefin resin film; and the adhesive layer is composed of a polyolefin resin extruded layer.         The cover material according to item 1 of the scope of patent application, wherein the outer layer portion has a base material layer, a barrier layer, and a buffer layer that are sequentially laminated from the outside.         The cover material according to item 3 of the scope of patent application, wherein the buffer layer is made of a polyamide resin film; the polyimide resin film is formed with a corona treatment on both sides of the barrier layer side only. Floor.         The cover material according to item 1 of the scope of patent application, wherein the peel strength between the outer layer portion and the inner layer portion is 0.4 to 1.5 N / 15 mm.         A packaging body is provided with a container and a cover material for accommodating articles; the foregoing articles perform a predetermined function by performing gas exchange between the accommodating space and an external space; and the cover material is thermally fused to the opening edge of the container The cover is for covering the opening of the container; the feature is the cover material, which is composed of the cover material described in any one of claims 1 to 5.         The package according to item 6 of the scope of application for a patent, wherein the article is a fragrance, a deodorant, or a hygroscopic agent.