JP2598106Y2 - Packaging material with high-speed packaging suitability - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material for packaging objects such as soap. More specifically, it is used for an easily openable package in which the packaged material is stored in a storage portion formed by folding the packaging material in three, and the outer folded piece is used as a lid portion, and the lid portion can be easily peeled off. The present invention relates to a packaging material having high suitability for high-speed packaging.

[0002]

2. Description of the Related Art Conventionally, a packaging body 9 of soap or the like, as shown in FIG. 3, is obtained by pillow packaging (FIG. 3 (A)) or wrapping packaging (FIG. 3 (B)). 9 was common. However, the pillow-packaged package 9 is generally tightly sealed in the heat seal portion 91, so that the only way to open it is to tear the package material. Further, there is a problem that it is difficult to open the package 9 by overwrapping. Therefore, as shown in FIG. 2, the packaged object 8 is stored in a storage portion 71 formed by folding a rectangular packaging material into three, and the outer folded piece is used as the lid 72, and the lid 72 is easily peeled off. There has been proposed a package 9 which is heat-sealed so that the packaged object 8 can be easily taken out.

[0003] As a packaging material used in the above-mentioned packaging body 9, a foamed sheet such as foamed polypropylene having a pearl-like appearance, a touch and a texture, and a touch is used in order to give a sense of quality. ing. As such a pearl-like foamed sheet, a foamed polypropylene sheet “Sanipearl” (trade name) manufactured by Mitsui Toatsu Co., Ltd. is known as a packaging material excellent in the above points and widely used.

[0004] This "Sanipearl" (trade name) is a polypropylene sheet expanded at a high expansion ratio, contains many air bubbles in the sheet, and the air bubbles and the gloss of the polypropylene itself are added. The pearl tone, matte tone and texture are realized by the pearl pigment. And, specifically, a hot melt adhesive for heat sealing is applied to one surface of the foamed polypropylene sheet, and a pattern printing layer is applied to the other surface.
A packaging material on which an overcoat varnish layer is formed as necessary has been used.

[0005]

By the way, the operation of preparing a package using such a packaging material is automatically packaged, and today, it is required to further speed up the packaging operation. Is coming. Here, in the packaging material using the above-mentioned highly foamed “Sanipearl”, since the above-mentioned sheet is highly foamed, the heat of heat sealing is shut off, and there is a problem that the required high-speed packaging is difficult. . This problem is slightly improved by increasing the heat sealing temperature. However, if an excessively high heat (160 ° C. or more) is applied, the heat may cause the foamed polypropylene to melt. there were. In addition, the hot-melt adhesive was provided to complete the seal forming the storage section, and was used to easily heat-seal the foamed polypropylene and the lid, There is also a problem that when the temperature is made high in high-speed packaging, hot tack is lacking. Therefore, in the above-described conventional packaging material, the packaging speed is limited to about 50 shots / minute.

Therefore, the present invention provides the same high-class feeling as before without using the highly foamed polypropylene sheet,
Moreover, the present invention provides a packaging material which is excellent in suitability for high-speed automatic packaging.

[0007]

According to the present invention, a storage portion is formed by folding a substantially rectangular packaging material into three in the longitudinal direction, and heat-sealing both ends in the width direction of a folded piece folded inward. A packing material used for a package body in which a folded piece that is folded outward is used as a lid and both ends in the width direction thereof are easily heat-sealed while accommodating an article to be packaged. From the side
Unstretched polypropylene, pearl pigment-containing expanded polypropylene, and matte polyethylene terephthalate are laminated in this order, and a pearl ink layer and a mat varnish layer are formed on the outer surface of the matte polyethylene terephthalate, and a heat seal varnish layer is further formed thereon. A packaging material having high-speed packaging suitability, characterized in that it is partially formed at a position where the lid is heat-sealed.

In the present invention, the pearl pigment-containing expanded polypropylene is preferably a low-expanded one. Further, in the present invention, a picture printing layer can be provided between the pearl ink layer and the mat varnish layer. Further, in the present invention, it is preferable that the position of the heat seal forming the storage portion coincides with the position of the heat seal of the lid portion.

[0009]

The packaging material of the present invention exhibits a high-class pearly appearance and texture by the above-mentioned expanded polypropylene containing pearl pigment, matted polyethylene terephthalate, pearl ink layer and mat varnish layer. Then, the unstretched polypropylene on the side that comes into contact with the packaged object shows excellent hot tack properties even at high temperatures to realize high-speed packaging, and the heat seal varnish layer formed on the outermost surface is The layers will be stacked,
A heat seal that can be easily peeled is provided between the pearl ink layer and the matted polyethylene terephthalate on which the mat varnish layer is formed. Then, by matching the position of the heat seal forming the storage portion with the heat seal position of the lid portion, the heat seal of the lid portion is performed at the same time as the heat sealing of packaging the article to be packaged and forming the storage portion of the packaging material. It can be carried out.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the packaging material of the present invention, and FIG. 2 is an explanatory view of a package according to the present invention.
2A is a perspective view, FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A, and FIG. 2B is a cross-sectional view taken along line BB of FIG. 2A.

The packaging material of the present invention shown in FIG. 1 comprises an unstretched polypropylene 1, a pearl pigment-containing expanded polypropylene 2, a matted polyethylene terephthalate 3, a pearl ink layer 4 and a mat varnish layer 5, which are successively formed. The layer 6 is partially formed.

When the packaging material is folded in three as shown in FIG. 3, when the both ends 91 in the width direction of the folded piece 75 overlapping on the inside are heat-sealed, the unstretched polypropylene By heat-sealing the two, complete and strong heat-sealing is realized. Then, the storage portion 71 of the packaged object 8 is formed by the heat sealing. Further, since the unstretched polypropylene 1 has excellent hot tack properties, it is suitable for high-speed packaging. Furthermore, it is preferable because it is superior in odor as compared with the EVA resin generally used as a resin for the heat seal layer.

Specific examples of such unstretched polypropylene 1 include “TAF502” manufactured by Tosero Corporation.
C "(trade name, co-extruded unstretched polypropylene) can be suitably used. This “TAF502C” has a three-layer structure, in which a homo-type polypropylene layer is made into two layers.
This is a film in which one and three layers of a Co polytype polypropylene layer are coextruded. And in the present invention,
A Co-polytype polypropylene layer is positioned as the heat seal layer.

In the present invention, pearl pigment-containing expanded polypropylene 2 is used. The pearl pigment-containing expanded polypropylene 2 is a conventionally used expanded polypropylene sheet “Sanipearl” (trade name) manufactured by Mitsui Toatsu Co., Ltd. Use a foaming material having a lower foaming ratio and a lower foaming ratio. Specifically, "Toyo Pearl" manufactured by Toyobo Co., Ltd.
(Product name, thickness 35μm), "UP" manufactured by Gunze
-2 "(trade name, thickness 35 μm)," N-2 "(trade name, thickness 35 μm) manufactured by TOCELLO CO., LTD.
In particular, the above-mentioned "Toyopearl" and "UP-2" can be suitably used. It is preferable to use a foamed polypropylene 2 having a size of 50 μm or less so that a so-called “stiffness” does not appear too much. The thickness of these films that can be formed is about 30 μm or more.

Matted polyethylene terephthalate 3
Is laminated in order to impart heat resistance and strength to the packaging material. However, since it is formed into a mat, it is also useful for giving the packaging material a high-grade appearance. The polyethylene terephthalate film may be an ordinary biaxially stretched polyethylene terephthalate film, and the preferred thickness is about 12 μm. Examples of the matting method include a method in which an inorganic extender such as silica fine powder is kneaded into a resin to form a film.

The unstretched polypropylene 1, the pearl pigment-containing foamed polypropylene 2, and the matted polyethylene terephthalate 3 may be laminated by a method such as dry lamination using an adhesive. It may be formed on the pigment-containing expanded polypropylene 2 by extrusion coating. The matted polyethylene terephthalate 3
It is necessary to laminate the matted surface so that it is on the outer surface side.

In the packaging material of the present invention, a pearl ink layer 4 and a mat ink layer 5 are sequentially formed on the matted polyethylene terephthalate 3. Although both layers are formed on the entire surface, they may be provided partially if necessary for design.

The pearl ink layer 4 contains a pearl ink obtained by adding 1 to 30% by weight of a pearl pigment to a medium.
It is formed with a coating amount of 5 to ² g / m ² . As a coating method, a known method such as a gravure printing method or a silk screen printing method can be adopted.

The mat varnish layer 5 contains a varnish containing a matting agent in an amount of 0.1%.
5 to 10% by weight of the matte ink,
It is formed with a coating amount of ² g / m ² . The application method is the same as described above.

The order of the pearl ink layer 4 and the mat varnish layer 5 must be in the order shown in the figure. That is,
The pearl ink layer uses iriodine as a pearl pigment, and the resin is a nitrocellulose-based / polyamide-based resin. Therefore, the pearl-ink layer 4 has poor heat resistance. On the other hand, the mat varnish layer 5 has good heat resistance because an inorganic substance such as silica is added and the resin can be a nitrocellulose-based simple substance. Therefore, the mat varnish layer 5 is formed as an upper layer. Need to be done.

According to the present invention, on the above-mentioned mat varnish layer 5,
Further, the heat seal varnish layer 6 is partially formed. The heat seal varnish layer 6 is for heat sealing so that the outer folded piece 76 serving as the lid portion 72 can be easily peeled off. This is to provide a heat seal that is easily peeled between the unstretched polypropylene 1 and the portion 72. As the varnish of the heat seal varnish layer 6, a varnish containing an ethylene-vinyl acetate copolymer as a main component can be used. And, as this heat seal varnish, hot tack property is necessary and has heat resistance.
An ethylene-vinyl acetate copolymer having a high degree of polymerization is preferred. As the heat seal varnish that satisfies the above required quality, specifically, “Dick Seal M-720AH” (trade name, EVA heat seal varnish) manufactured by Dainippon Ink Co., Ltd. can be suitably used. The application amount of the heat seal varnish is preferably 1.5 to 5 g / m ² .

The heat-sealing position for forming the storage portion 71 and the heat-sealing position for the lid portion 72 are designed to coincide with each other. The heat sealing of the lid 72 can be performed at the same time as the heat sealing for forming the storage portion 71 of the packaging material.

Packaging of the article to be packaged 8 using the above packaging material is performed as follows. The article to be packaged 8 is placed substantially at the center of the packaging material. Next, one end in the longitudinal direction of the packaging material is folded back so as to cover the article to be packaged (the inner folded piece 7).
5) Then, the other end of the packaging material in the longitudinal direction (the outer folded piece 76) is folded back on the inner folded piece 75 as the lid 72. Thereafter, both ends 91 in the width direction of the packaging material are heat-sealed. As a result, the portion folded inside the packaging material is heat-sealed between the unstretched polypropylenes 1 to form the storage portion 71. Then, at the same time, the portion folded outward (that is, the lid 72) is heat-sealed by the non-stretched polypropylene 1 and the heat-sealing varnish layer 6. And this lid part 72 becomes easy to peel off.

Although the present invention has been described in detail above, various modifications can be made to the packaging material of the present invention within a range that does not impair the purpose of the present invention. For example, in the packaging material of the present invention, a pattern printing layer can be provided at an appropriate position, preferably between the pearl ink layer 4 and the mat varnish layer 5. Further, in addition to the above-mentioned pattern printing layer, a hot stamp or the like for giving a design property may be further added.

<Example 1> First, as pearl pigment-containing foamed polypropylene, "N-2" (trade name, 35 μm in thickness, both surfaces subjected to corona discharge treatment) manufactured by Tocelo Co., Ltd., and unstretched polypropylene (Tocelo Co., Ltd.) "TAF502C" (trade name), thickness 25 µm, single-sided corona discharge treated), the urethane-based dry laminating adhesive (Takeda Pharmaceutical Co., Ltd.) Dry lamination was performed using Takelac A-610 (trade name, manufactured by Kogyo Co., Ltd., application amount: 2 g / m ² ).

Separately, a matted polyethylene terephthalate having a thickness of 12 μm (“P
A pearl ink layer, a pattern printing layer, and a mat varnish layer were sequentially formed on one surface of “THZ” (trade name), both surfaces of which had been subjected to corona discharge treatment, by a gravure printing method. Here, the pearl ink layer is obtained by adding 20% of "Iriodin" (trade name, pearl pigment) to "Pyro Ace Medium" (trade name, nitrocellulose / polyamide) manufactured by Toyo Ink Mfg. Co., Ltd. And a coating amount of 1.5 g / m ² .
The pattern printing layer was formed using a nitrocellulose-based resin / polyamide-based resin ink at a coating amount of 2 g / m ² . In addition, the mat varnish layer is made of “JS1144OP varnish” (trade name, nitrocellulose resin / ethylcellulose resin) manufactured by Toyo Ink Mfg. Co., Ltd.
0 (silica fine powder) was added to form a coating amount of 1 g / m ² .

Further, a heat seal varnish (manufactured by Dainippon Ink Co., Ltd., “Dick Seal M-
720AH "(trade name, EVA system) is applied to both ends in the width direction of the portion to be the lid of the packaging material at an application amount of 2 g /
It was formed in m ^2.

Then, the matted polyethylene terephthalate is coated on the surface of the pearl pigment-containing expanded polypropylene of the laminate of the above-mentioned “pearl pigment-containing expanded polypropylene / unstretched polypropylene” with a urethane-based dry powder so that the heat seal varnish layer is on the outer surface. Dry lamination was performed using a laminating adhesive (TAKERAC A-610 (trade name), manufactured by Takeda Pharmaceutical Co., Ltd., coating amount 2 g / m ² ).

The obtained packaging material is a pearl-like packaging material having extremely excellent design properties, and has excellent touch and texture, and is comparable to that of a conventional highly foamed sheet. It had a design.

The packaging material obtained as described above is
When punched to a predetermined size and wrapped in soap using the above-mentioned packaging method, even when the heat sealing temperature was raised to 200 ° C, troubles during heat sealing (such as being taken into the seal bar and shrinking the packaging material) occurred. Did not. Then, according to the packaging material having the above configuration, automatic high-speed packaging at 180 shots / minute was possible.

When the heat seal portion of the obtained package was inspected, the heat seal strength of the inner heat seal portion (that is, forming the storage portion) was 1500 g / 15 m.
The width was m and was sufficiently strong. The heat seal of the lid had a heat seal strength of 300 g / 15 mm width, could be easily peeled off, and was easy to open.

[0032]

[Effects of the Invention] Since the packaging material of the present invention has the above-described configuration, it is possible to provide a packaging material having the same high-quality feeling as before without using a highly foamed polypropylene sheet. Further, the packaging material of the present invention is a packaging material that can be heat-sealed at a high temperature and is therefore excellent in suitability for high-speed automatic packaging.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a packaging material of the present invention.

FIG. 2 is an explanatory view of the package according to the present invention, and FIG.
2A is a perspective view, FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A, and FIG. 2C is a cross-sectional view taken along line BB of FIG. 2A.

FIG. 3 is an explanatory view showing a conventional package, and FIG.
3 is a perspective view showing a pillow package, and FIG. 3B is a perspective view showing an overwrap package.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Unstretched polypropylene 2 ... Expanded polypropylene mixed with pearl pigments 3 ... Matted polyethylene terephthalate 4 ... Pearl ink layer 5 ... Matt varnish layer 6 ... Heat seal varnish layer 8 ... Packaged object 9 ... Package 71: storage section 72: lid

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B65D 75/00-75/24 B32B 27/00 B32B 27/08 B32B 27/20

Claims (4)

(57) [Scope of request for utility model registration] 1. A storage portion is formed by folding a substantially rectangular packaging material into three in the longitudinal direction, and heat-sealing both ends in the width direction of the folded piece that is folded inward to store a packaged object in the storage portion. A packaging material used for a packaging body in which a folded piece that folds outwardly is used as a lid and both ends in the width direction are easily heat-sealed, and from the side in contact with the article to be packaged, unstretched polypropylene, pearl pigment The foamed polypropylene and matte polyethylene terephthalate are laminated in this order, and a pearl ink layer and a mat varnish layer are formed on the outer surface of the matte polyethylene terephthalate. A packaging material having high-speed packaging suitability, characterized in that the packaging material is partially formed at a position to be formed. 2. The packaging material according to claim 1, wherein the expanded pearl pigment-containing polypropylene has low foaming. 3. The image printing layer according to claim 1, wherein the pattern printing layer is provided between the pearl ink layer and the mat varnish layer.
The packaging material according to any one of the above. 4. The packaging material according to claim 1, wherein the position of the heat seal forming the storage portion and the position of the heat seal of the lid coincide with each other.