JP2933980B2 - ▲ l ▼-Package of menthol-containing food - Google Patents

Description

The present invention relates to a package for enclosing a food containing -menthol.

[Conventional technology]

Conventionally, -menthol is used as a cooling agent in foods such as drinks and confections.

As described above, foods containing -menthol are hermetically contained in individual packages such as plastic packaging materials (including containers) or plastic laminated aluminum from the viewpoint of hygiene and the like, and are provided to the market.

[Problems to be solved by the invention]

However, the conventional general plastic packaging material has a problem that the content of -menthol in food decreases over time, and it is necessary to develop a packaging material that reduces adsorption of -menthol in food as much as possible. Has been done.

In view of such circumstances, the present invention provides a package of menthol-containing food that can minimize a decrease in menthol content over time in food stored and stored in a packaging material. It is in.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention provides a package for enclosing a food containing -menthol, wherein a polyester-based resin layer is provided on an inner surface of the package that can come into contact with the food.

[Action]

In the package of the food containing -menthol of the present invention, since the polyester resin is provided on the inner surface of the package that can come into contact with the food, the decrease of -menthol in the food to be encapsulated over time is extremely small. Also, it has excellent moisture-proof effect and productivity.

〔Example〕

The package 1 of the food containing -menthol of the present invention will be described with reference to FIGS. 1 and 2. FIG.

As shown in FIG. 2, the package 1 of the present invention has, for example, a bag structure capable of enclosing the contents, and is intended for the -menthol-containing food 7 as the contents. −
The menthol-containing food 7 is a concept including all foods containing -menthol as a cooling agent in drinks and confections.

As shown in FIG. 2, for example, the package 1 is formed by combining sheet-like packaging materials (hereinafter, simply referred to as packaging materials) 10, 10 into two.
As shown in FIG. 1, a polyester resin layer 2 is provided on the inner surface of the package body which can be brought into contact with food, and formed by heat sealing the periphery of the package body. The polyester resin layer 2 contains an amorphous or low-crystalline modified polyethylene terephthalate resin having a glass transition temperature of 40 ° C. or more and a crystallinity of 10% or less.

Such a modified polyethylene terephthalate resin is
It comprises a copolymer obtained by using a polyhydric alcohol other than ethylene glycol and / or a polycarboxylic acid other than terephthalic acid as a copolymer component containing ethylene glycol and terephthalic acid as main components. A polyester resin, specifically, a modified polyethylene terephthalate resin in which a part of the acid component is replaced with isophthalic acid, diphenylcarboxylic acid, trimetic acid, adipic acid, sebacic acid, or the like;
Part is diethylene glycol, propylene glycol, 1,
It is formed of a modified polyethylene terephthalate resin replaced with 4-cyclohexanedimethanol, trimethylolpropane, or the like, or a mixed resin of the above-mentioned modified polyethylene terephthalate resin and polyethylene terephthalate resin.

Specific examples of the modified polyethylene terephthalate resin include ethylene glycol and isophthalic acid and terephthalic acid, 1,4-cyclohexanedimethanol and ethylene glycol and terephthalic acid, and a co-condensation polymer of a combination of propylene glycol and isophthalic acid and terephthalic acid. When polymerizing a polyester resin using the above-mentioned terephthalic acid and ethylene glycol as a base material, a trivalent carboxylic acid such as trimellitic acid is used as a part of the acid component, or alcohol is used. A trihydric alcohol such as trimethylolpropane is used for one part of the component, or a trivalent carboxylic acid and a trihydric alcohol are used for one part of the alcohol component and one part of the acid component. It is a copolymerized polyester resin obtained by the above method.

In addition, the aliphatic dicarboxylic acid component in the acid component is 10% by weight.
The resin layer formed of the modified polyethylene terephthalate resin as described above is not preferable because the non-absorbency of -menthol decreases. The thickness of the polyester resin layer 2 of the present invention containing such a modified polyethylene terephthalate resin is 5 to 50 μm, more preferably 20 to 50 μm.
4040 μm. If this value is less than 5 μm, a resin layer having a uniform thickness and high precision cannot be obtained, and a disadvantage that stable heat sealing cannot be obtained occurs.
If it exceeds m, the cost will increase, and the film will become stiff and disadvantageous in terms of texture.

On such a resin layer 2 (outside), a barrier layer 4 is provided as shown in FIG. As the barrier layer 4, an aluminum foil or the like having a gas barrier property or a water vapor barrier function is mainly used. The thickness is usually about 7 to 20 μm.

On such a barrier layer 4 (outside), a support layer 6
Is formed. The support layer 6 is mainly used for imparting the strength of the packaging material or for providing a stamp or the like, and specifically,
Examples include stretched polyester (O-PET), stretched polypropylene (O-PP), cellophane, and the like.

Preferably, an intermediate layer as described below is provided between the resin layer 2 and the barrier layer 4. That is, a polybutylene terephthalate resin or a polycarbonate resin layer as an intermediate layer, or an adhesive polyolefin-based resin layer and a polyolefin-based resin layer, or a polyolefin-based resin layer having a carboxyl group and a contact surface with the resin layer 2 It is preferable to provide a layer or the like that has been subjected to corona discharge treatment in advance on the side.

When such an intermediate layer is provided, the sealing strength and the impact resistance of the heat seal portion where the resin layers 2 are thermally bonded to each other are significantly improved when the package of the present invention is formed.

In the present embodiment, a package manufactured by fusing a film by heat sealing has been described as an example, but the configuration of the package is not limited to this and can be applied to various types of blow containers, vacuum-formed containers, and the like. It goes without saying that you get it.

The present invention described above will be described in more detail with reference to the following specific examples.

Experimental Example A laminating agent obtained by dry laminating a biaxially stretched polyester film (15 μm) as the support layer 6 and an Al foil (9 μm) as the barrier layer 4 with a urethane-based adhesive was used as a packaging material base material (hereinafter referred to as a base material). Material a)).

Various resin layers constituting the inside of the package as shown below were provided on the Al foil surface of the base material a, and various packaging samples (hereinafter referred to as packaging material samples) were produced.

Packaging Material Sample 1 (Invention) After applying a urethane-based adhesive to the Al foil surface of the base material a, a modified polyethylene terephthalate resin having a glass transition temperature of 71 ° C. (Mitsui DuPont Chemical Co., Ltd.) ): Sealer PTX207) was provided as polyester resin layer 2.

 The thickness of the resin layer 2 was 40 μm.

Packaging Sample 2 (Invention) The material of the polyester resin layer 2 of the packaging sample 1 was changed to a modified polyethylene terephthalate resin having a glass transition temperature of 81 ° C. (Eastman Kodak Company: PETG 6763).

 Otherwise, the procedure was the same as for sample 1.

Packaging Material Sample 3 (Comparative Example) The material of the polyester resin layer 2 of the packaging sample 1 was changed to a modified polyethylene terephthalate resin having a glass transition temperature of −20 ° C. (Toyobo Co., Ltd .: Byron GM 900).

 Otherwise, the procedure was the same as for sample 1.

Packaging Material Sample 4 (Comparative Example) The material of the polyester resin layer 2 of the packaging sample 1 was changed to a low density polyethylene resin (Mitsui Petrochemical Co., Ltd .: Mirason 16P). Otherwise, the procedure was the same as for sample 1.

Packaging Material Sample 5 (Invention) The thickness of the polyester resin layer 2 of the packaging material sample 1 was set to 20 μm, and a polybutylene terephthalate resin (Polyplastics Corp.) was used as an intermediate layer between the resin layer 2 and the Al foil. : Duranex PP600) with a thickness of 20 μm.

The resin layer 2 and the intermediate layer were formed as a co-pressed film by co-pressing, and were laminated by dry lamination with a urethane-based adhesive such that the intermediate layer was in contact with the Al foil surface.

Packaging Material Sample 6 (Invention) The intermediate layer of the packaging material sample 5 was a polycarbonate resin (Mitsubishi Gas Chemical Co., Ltd .: Iupilon S-200).

 Otherwise, the procedure was the same as for sample 5.

Packaging Material Sample 7 (Invention) The intermediate layer of the packaging material sample 4 was coated with a 10 μm thick polyolefin resin (Mitsui Petrochemical Co., Ltd .: Admer SF-
600) and a 10 μm-thick polyolefin resin (Mitsui Petrochemical Co., Ltd .: Mirason 16P).
Otherwise, the procedure was the same as for sample 5. The bonding surface with the Al foil surface was Mirason 16P.

Packaging material sample 8 (the present invention) On the Al foil surface of the base material a of the above-mentioned laminated material, the above-mentioned laminated film is coated with a polyolefin resin having an Al foil surface and a carboxyl group (DuPont Mitsui Polychemical Co., Ltd .: Nuclell) AN4213C) A laminate was obtained by hot-press bonding while laminating 20 μm by an extrusion coating method.

Next, a corona discharge treatment is applied to one surface of the polyolefin resin film having a carboxyl group, and a modified polyethylene terephthalate resin having a glass transition temperature of 71 ° C. (Mitsui DuPont Polychemical Co., Ltd .: Sealer) A resin layer having a thickness of 20 μm by PTX207) was directly extruded and laminated to obtain a packaging material sample 8.

Using these various packaging material samples 1 to 8, a 50 mm × 40 mm three-side seal pouch was formed by heat sealing.

After filling the obtained three-side seal pouch with 10 g of -menthol-containing drops, the opening was sealed by heat sealing to obtain a sealed package sample.

After leaving these various sealed package samples in an atmosphere of 37 ° C. for 60 days, the samples were opened, and the retention of the initial concentration of -menthol contained in the food was determined by gas chromatography.

 The results are shown in Table 1 below.

[Effects of the Invention] The effects of the present invention are clear from the results in Table 1 above.

That is, in the package of the -menthol-containing food of the present invention, since the polyester resin is provided on the inner surface of the package that can come into contact with the food, the decrease of -menthol in the encapsulated food over time is extremely small. Also, it has excellent moisture-proof effect and productivity.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a packaging material, and FIG. 2 is a vertical cross-section of a package. 1 ... package, 2 ... polyester resin layer, 4 ...
Barrier layer, 6 ... support layer, 7 ...-menthol-containing food, 10 ... packaging material.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ identification symbol FI B65D 85/72 A23L 2/00 W (58) Fields investigated (Int.Cl. ⁶ , DB name) A23L 1/00 A23L 2 / 00 A23G 3/00 B32B 27/36 B65D 85/40 B65D 85/72

Claims (3)

(57) [Claims] 1. A package for enclosing a food containing menthol, wherein a polyester resin layer is provided on an inner surface of the package which can come into contact with the food. . 2. The menthol-containing food according to claim 1, wherein the polyester resin layer contains an amorphous or low crystalline modified polyethylene terephthalate resin having a glass transition temperature of 40 ° C. or higher. Packaging. 3. The polyester resin layer has a thickness of 5 to 50 μm.
3. The package of foodstuffs containing menthol according to claim 1 or 2, wherein m is m.