JP4478317B2 - Easy-open blister pack - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an easily openable blister.
[0002]
[Prior art]
Many items such as household goods, cooking utensils, small electrical products, small toys, cosmetics and adhesives with tubes, stationery such as scissors, razors and staplers are blister packed. For example, FIG. 6 is a diagram showing an example of a conventional blister package B ', (a) a perspective view, (b) and (c) it is opened before the X ₃ -X ₃ parts after opening of each It is sectional drawing.
Examples of the blister package B ′ include a tray 1 ′, a lid 10 ′, and a covering material 20 ′ that sandwiches the flange portion of the tray together with the lid 10 ′.
[0003]
[Problems to be solved by the invention]
In conventional blister packaging, a tray and a lid are often used, and the flange portion of the tray and the lid are often firmly bonded. In such blister packaging, the lid is peeled off from the tray in order to take out the packaged contents. At this time, when opening, the paper layer is agglomerated and broken, or the adhesion is strong. In some cases, the lid was cut to remove the contents.
In addition, it cannot be said that printing is easy to see because printing is mainly performed on the front of the lid. In other words, the contents side and the information printing surface are the front and back.
Further, as shown in FIG. 6 (a), there is a method of heat sealing by sandwiching the flange portion 3 ′ of the tray 1 ′ between the lid 10 ′ and the covering material 20 ′. The heat seal was adhered by a heat seal layer formed by applying a heat sealant to the lid 10 'and the covering material 20'. When the blister having this structure is opened, as shown in FIG. 6C, the pattern and characters printed on the paper surface are deciphered due to the cohesive failure of either the paper layer of the lid 10 'or the covering material 20'. I couldn't do it often.
The objective of this invention is providing the blister package which has a structure which is easy to open and it is easy to see printing information.
[0004]
[Means for Solving the Problems]
The present invention includes a concave portion for storing contents, a tray having a flange portion at the periphery thereof, a lid body that covers the tray opening portion and the flange portion, and has an outer edge larger than the outer edge of the flange portion, and an outer edge of the outer cover body. The outer edge has substantially the same outer edge, and the inner edge is made of a covering material having a shape capable of covering at least the flange portion. The lid is placed on the opening side of the tray in which the contents are stored in the concave portion, and the cover is covered with the covering material. In a blister-type packaging in which a flange portion is sandwiched with a body and heat-sealed with a lid outside the outer edge of the flange portion, at least the covering material comprises a base material layer, a biaxially stretched polyester film, and a polyethylene layer, and the biaxially stretched It is an easily peelable laminate having an adhesive strength between the polyester film and the polyethylene of 50 g / 15 mm to 500 g / 15 mm. A open blister package, said method comprising the substrate layer is paper, or may be composed of dressing and the lid is easily peelable laminate.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The easy-open blister package of the present invention is a blister container that is heat-sealed and fixed in a state where the flange portion of the tray is sandwiched between the lid and the covering material, and is easily peeled off at least to a composite film laminate constituting the covering material A surface is included.
FIG. 1 is a view showing an embodiment of the easy-open blister package of the present invention, in which (a) a perspective view of a packaged state, (b) a cross-sectional view of X ₁ -X ₁ part, and (c) each member is separated. indicated figure, a (d) X ₂ -X ₂ parts cross section. FIG. 2 is a cross-sectional view showing the structure of the covering material. FIG. 3 is an enlarged view of a Y portion for explaining a peeled state when the blister package of the present invention is opened, and shows a state before (a) opening and (b) opening. FIG. 4 is an enlarged view of a Y portion for explaining a peeled state when another blister package of the present invention is opened, and shows a state before (a) opening and (b) opening. FIG. 5 is a cross-sectional view illustrating the state of each layer when the easy-open blister package of the present invention is opened.
[0006]
As a result of earnest research on the packaging material and structure in order to obtain a blister package having a structure that allows easy opening and easy-to-read printing information of the present invention, the inventor of the present invention has a concave portion for storing contents and a flange portion on the periphery thereof. A tray that covers the tray opening and the flange portion, has a lid body that has an outer edge larger than the outer edge of the flange portion, and has an outer edge substantially the same as the outer edge of the lid body, and the inner edge can cover at least the flange portion The cover is placed on the opening side of the tray that contains the contents in irregularities, and the cover is sandwiched between the cover and the flange with the cover. In the blister package having a structure to be sealed, at least the covering material comprises a base material layer, a biaxially stretched polyester film, and a polyethylene layer. Adhesive strength of the adhesive surface of the arm and said polyethylene has completed the present invention can solve the above problems by the easy peelable laminate is 50 g / 15 mm width to 500 g / 15 mm width.
[0007]
As shown in FIG. 1 (c), the easy-open blister package B of the present invention forms a recess 2 for storing the contents P, and covers the tray 1 and the recess 2 having a flange portion 3 on the periphery. The outer edge has a lid body 10 having an outer edge 11 larger than the outer edge 4 of the flange portion 3 of the tray 1, and an outer edge 21 substantially the same as the outer edge 11 of the lid body 10, and the inner edge covers at least the flange portion 3. The covering material 20 has a shape that can be formed.
[0008]
The covering material 20 is composed of an easily peelable laminate 30 having a structure as shown in FIG. 2, and is composed of at least three layers of a base material layer 31, a biaxially stretched polyester film 32, and a low density polyethylene 33. The base material layer 31 may be printed 34. The easy peeling of the easily peelable laminate is an adhesive interface between the biaxially stretched polyester film 32 and the low density polyethylene 33, and the laminate strength between the biaxially stretched polyester film 32 and the low density polyethylene layer 33 is 100. The width is 200 g / 15 mm.
[0009]
The easy-open blister package B of the present invention contains the contents P in the tray 1, covers the opening with the lid 10, and sandwiches the flange 3 of the tray 1 with the lid 10 and the covering material 20, The lid 10 and the covering material 20 are formed by pressurizing and heat-sealing.
[0010]
In order to open the obtained easy-opening blister B of the present invention, as shown in FIG. 1 (a), an opening knob T is provided on a part of the peripheral edge of the blister pack to form an opening start portion. The unsealing knob portion T is provided with a non-sealing portion NS as shown in FIG. At the time of opening, when the cover body 20 and the covering material 20 of the non-sealed portion NS of the opening knob T are picked and the covering material 20 is peeled off from the cover body 10, the biaxially stretched polyester film 32 of the covering material 20 Since the space between the polyethylene layer 33 and the polyethylene layer 33 is easily separated, the tray 1 becomes free and the contents can be easily taken out. At this time, as shown in FIG. 3B, the polyethylene layer 33 of the covering material 20 is damaged by the step of the flange portion at the outer edge portion of the tray flange due to heat and pressure during the heat sealing. 6 is formed, the region heat-sealed with the lid body is transferred to the lid body side, and the inner portion of the damaged portion 6 remains adhered to the covering material side.
[0011]
The tray 1 in the easy-open blister package B of the present invention can be molded using a method such as vacuum molding, pressure molding, vacuum pressure molding, injection molding, or the like.
In conventional blister packaging, heat sealing is required for the lid or the heat seal layer applied to the lid, but in the present invention, heat sealing as a tray for the lid is not required. is there. As a material for the tray used in the easy-open blister of the present invention, polypropylene, polystyrene, polyvinyl chloride, polyethylene terephthalate, polycarbonate, polyacrylonitrile, or the like can be used.
[0012]
The material of the lid body 10 in the easy-open blister package B of the present invention may be a single paper layer or a laminate of paper and other materials. The surface of the lid 10 on the tray 1 side is made of a material having heat sealability with respect to the low density polyethylene layer of the covering material. As shown in FIG. 4A or FIG. 4B, the same easily peelable laminate as the covering material 20 can be used as the lid 10. The lid 10 is preferably a sheet that has rigidity and does not curl when placed on the tray.
[0013]
The coating material of the present invention will be described in further detail. As shown in FIG. 2, the covering material is an easily peelable laminate in which a base material 31 and an easily peelable laminate are bonded together.
[0014]
The easily peelable laminate in the easily peelable laminate is a laminate of a polar synthetic resin base material layer and a nonpolar synthetic resin layer, and the adhesive strength at the laminate interface of the quantity layer was controlled to an easily peelable state. Is.
When the covering material and the lid are separated from the knob provided at the end of the blister, the easily peelable surface is peeled between the biaxially stretched polyester film and the polyethylene layer from the tearing portion, and a thin polyethylene film, Since the biaxially stretched polyester film surface is adhered, the molded product is completely released from the fixed state.
[0015]
【Example】
The easy-open blister package of the present invention will be described more specifically with reference to examples.
[Example 1]
The easy-peelable laminate used for the covering material was first extruded into a PET 12 μm base material (PET film: Toyobo Co., Ltd., PET film: E5100), PE7 μm (Mitsui Chemicals Co., Ltd., polyethylene resin: Mirason 11P) was extruded at a temperature of 280 ° C. Extrusion-coating was carried out to prepare an easily peelable laminate of PET 12 μm / PE 7 μm.
Separately, using coated cardboard (basis weight: 400 g / ■) as the base material layer, the non-laminated surface (polyester surface) of the biaxially stretched polyester film of the easily peelable laminate was subjected to corona treatment and adhered to the corona-treated surface. A coating agent (acrylic water-based adhesive: manufactured by Tokyo Ink Co., Ltd .; SA-T610W, adhesive application amount 10 g / ■) is applied and wet-laminated with the coated cardboard as the base material layer to form an easily peelable laminate. Obtained.
Next, the obtained easily peelable laminate was punched into a predetermined size to obtain a coating material. Moreover, as a tray, the unstretched polyester sheet was vacuum-formed.
As the lid, the same coated cardboard (basis weight: 400 g / ■) as that of the base material layer was used, and a pattern was provided on the content side by an offset printing method.
Store the toy as the contents in the tray, cover the opening of the tray with the lid, heat seal with the tray flange sandwiched between the lid and the above-mentioned punched coating material, Example 1 was obtained.
<Layer structure of sealing surface>
(Coating material side) Cardboard / PET12 /./ PE7 / S / Cardboard (lid side)
(PET is a biaxially stretched polyester film,... Indicates an easily peelable surface, S indicates a heat seal surface, and the same applies hereinafter)
<Layer structure of the sealing surface of the tray flange>
(Coating material side) Cardboard / PET12 /./ PE7 / S / Tray flange / S / Cardboard (lid side)
When the sealing surface of the obtained blister pack Example 1 was peeled off, the sealing surface peeled off at the PET / PE interface (•), and the sealing surface of the tray flange peeled off between the PE / tray flange, and the paper and plastic tray Could be sorted neatly. In addition, the pattern provided on the lid 10 was clearly visible after peeling.
[Example 2]
The same material and process were used until the preparation of the easily peelable laminate as the covering material. However, the difference from Example 1 was that the same easily peelable laminate as the covering material was used for the lid. I have just done it. Therefore, when processing the easily peelable laminate on the lid side, a pattern was provided by printing on the laminate surface side of the coated cardboard. Let the obtained package be Example 2 of a blister package.
Layer structure of the sealing surface (coating material side) cardboard / PET12 /./ PE7 / S / PE7 / PET12 / cardboard (lid side)
Layer structure of the sealing surface of the flange part of the tray (coating material side) cardboard / PET12 /./ PE7 / tray flange part / PE7 / PET12 / cardboard (lid side)
When the sealing surface of Example 2 of the resulting blister pack package was peeled off, it was peeled off at the PET / PE interface, and the sealing surface of the tray flange was peeled off at the PE / tray flange, thus neatly separating the paper and the tray. We were able to. Moreover, after peeling, the pattern provided on the lid was also clearly visible.
[Comparative example]
Coated cardboard (basis weight) coated with a heat sealant (vinyl acetate aqueous adhesive S303, coated amount 10 g / square) on coated cardboard (basis weight: 400 g / ■) for both the covering material and the lid A blister pack having a structure composed of a tray, a covering material, and a lid, similar to the example, was prepared using a quantity of 400 g / ■), and used as a blister package comparative example 1.
<Layer structure of sealing surface>
(Coating material side) Cardboard / heat sealant / S / heat sealant / cardboard (lid paper side)
<Layer structure of the sealing surface of the flange part of the tray>
(Coating material side) Cardboard / heat sealant / tray flange / heat sealant / cardboard (lid side)
When the sealing surface of the obtained blister pack comparative example 1 was peeled off, either the covering material or the lid peeled off the paper, and further, paper adhered to the tray flange at the sealing surface of the tray flange portion, The paper and tray could not be completely separated.
[0016]
【The invention's effect】
The blister packaging that heat-seals the lid and the covering material in a state where the contents are stored in the tray having the flange portion and the flange portion is sandwiched between the lid and the covering material, and the material of the covering material is easily peeled off. By using a conductive laminate, it is possible to obtain a blister package that allows easy removal of the contents.
In addition, since the unsealing is peeling of the adhesive interface of the laminate of the covering material, the printed layer provided on the lid can be easily broken without breaking the printed layer.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of an easy-open blister of the present invention, in which (a) a perspective view of a packaged state, (b) a cross-sectional view of X ₁ -X ₁ part, and (c) each member is shown separately. Figure a (d) X ₂ -X ₂ parts cross section.
FIG. 2 is a cross-sectional view showing the structure of a covering material.
FIG. 3 is an enlarged view of a Y portion for explaining a peeled state when the blister of the present invention is opened, and shows a state before (a) opening and (b) opening.
FIGS. 4A and 4B are enlarged views of a Y portion for explaining a peeled state when another blister package of the present invention is opened, showing (a) before opening and (b) a state when opening. FIG.
FIG. 5 is a cross-sectional view illustrating an opening knob portion of the easy-open blister package of the present invention.
6A and 6B are diagrams showing an example of a conventional blister, wherein FIG. 6A is a perspective view, and FIGS. 6B and 6C are cross-sectional views of X ₃ -X ₃ part before opening and after opening, respectively.
[Explanation of symbols]
B Easy-opening blister P Contents HS Heat-sealing part T Unsealing knob part NS Non-sealing part 1, 1 'Tray 2 Recess 3 Flange part 4 Flange part outer edge 5 Flange part inner edge 6 Damaged part 7 Cohesive fracture part 10, 10' Lid Body 11 Outer edge 20, 20 'Coating material 21 Outer edge 22 Inner edge 30 Easy peelable laminate 31 Base material layer 32 Polarized synthetic resin base material layer 33 Nonpolar synthetic resin layer 34 Print layer 35 Surface treatment 36 Adhesive layer 37 Adhesive resin Layer 38 Release surface B 'Conventional blister package 1' Tray 3 'Flange portion 7 Cohesive fracture portion 10' Coating material 20 'Coating material

Claims (3)

A concave portion for storing contents, a tray having a flange portion on the periphery thereof, a lid body that covers the tray opening portion and the flange portion and has an outer edge larger than the outer edge of the flange portion, and an outer edge substantially the same as the outer edge of the lid body And the inner edge is formed of a covering material having a shape capable of covering at least the flange portion, the lid body is placed on the opening side of the tray in which the contents are stored in the recess, and the flange portion together with the lid body is covered with the covering material. In the blister-type package that heat seals with the lid on the outside of the outer edge of the flange part,
At least, the coating material is at least a base layer, and a biaxially oriented polyester film, a laminated body of the polyethylene layer,
Furthermore, the adhesive strength of the adhesive surface between the biaxially stretched polyester film and the polyethylene layer is an easily peelable laminate having a width of 50 g / 15 mm to 500 g / 15 mm ,
Then, the covering material is positioned with the polyethylene layer side facing the lid body, the flange portion of the tray is sandwiched with the lid body through the polyethylene layer, and the lid body is formed outside the outer edge of the flange portion. An easy-open blister package characterized by comprising a blister-type package for heat sealing .   The easy-open blister package according to claim 1, wherein the base material layer is paper.   The easy-open blister package according to claim 1 or 2, wherein the lid is an easily peelable laminate.

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