JP2013193791A - Packaging body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging body for easily turning over a cover material for opening a take out opening and for taking out an item from the opening with one hand.SOLUTION: A packaging body 1 includes a packaging material 2 with a take out opening 5 for taking out an article and a film-like cover material 3 attached repeatedly attachable and separable to the front face of the packaging material 2 covering the opening 5. The film-like cover material 3 includes a shape retaining film having a return angle between 0 and 40 degrees.

Description

  The present invention relates to a package body in which an article is packaged, and more particularly to a package body suitable for packaging a wet sheet impregnated with a liquid such as water, a drug, and alcohol.

As a package in which a wet sheet is packaged, a package having a packaging material having an outlet, and a film-like lid material that is peelably attached to the surface of the packaging material so as to cover the outlet is known. It has been.
When taking out the wet sheet from such a package, the lid material is raised with respect to the surface of the packaging material while the opening direction opening end portion of the lid material is lifted and the opening / closing direction end portion is attached to the surface of the packaging material. The outlet is opened by peeling it off.
However, if you release your hand from the film-like lid that has stood up, the lid will naturally return to the front side of the packaging material and close the outlet, so do not remove one hand from the lid and use the other hand. The wet sheet must be removed from the outlet. In other words, it is difficult to open the lid with only one hand and take out the wet sheet.

In view of such points, Patent Document 1 includes a multilayer film in which the outer layer has a larger heat shrinkage rate than the inner layer, and an adhesive provided on the back surface of the inner layer of the multilayer film. The package which covered the taking-out port by the label (film-like cover material) which has is disclosed.
Since the label of Patent Document 1 has a thermal contraction rate of the outer layer larger than that of the inner layer, when the label attached to the surface of the packaging material is rolled, the label can curl outward. For this reason, it is possible to prevent the outlet from being blocked by returning the peeled label.

However, since the label of Patent Document 1 is attached to the surface of the packaging material and heat shrinks the outer layer of the label, heat must be applied, and the article to be packaged in the packaging material may be damaged by heat. There is. For this reason, the articles to be packaged are restricted.
In this regard, if heat is applied to the label before sticking to the packaging material, heat will not be applied to the article, but when the label is heated, it will curl, so the curled label should be neatly placed on the surface of the packaging material. It becomes difficult to stick.

JP 2003-165574 A

  The purpose of the present invention is to remove the lid from the packaging material, and even if the hand is released from the packaging material, it is difficult for the lid material to return to the packaging material side. It is another object of the present invention to provide a package that can take out articles from the outlet.

  The packaging body of the present invention includes a packaging material having an outlet for taking out an article, and a film-like lid material attached to the surface of the packaging material so as to be peelable and re-adherable so as to cover the outlet The film-like lid material includes a shape-retaining film.

In the package of the present invention, since the lid material includes the shape maintaining film, the lid material is removed from the packaging material after the lid material is rolled from the packaging material. It is possible to prevent the outlet from being blocked.
A package having such a lid material can also be used to pick up the lid material with one hand and take out the article in the packaging material from the outlet with one hand.
The lid material of the present invention produces curl characteristics when rolled without any special treatment such as heating. For this reason, the articles stored in the packaging material are not restricted.

As for the preferable package of this invention, the said shape maintenance film has a return angle of 0 degree-40 degree | times.
In a preferable package of the present invention, the adhesive strength of the lid material to the surface of the packaging material is 1.5 N / 25 mm to 8 N / 25 mm.

  According to the package of the present invention, it is difficult for the covered lid material to block the outlet without performing a special treatment such as a heat treatment. Such a package of the present invention can also be subjected to a series of operations in which the lid is peeled off with one hand and the article is taken out from the outlet.

The perspective view of the package which concerns on one embodiment of this invention. II-II sectional view taken on the line of FIG. The top view of a packaging material (state which removed the cover material from the package of FIG. 1). The top view of the cover material concerning one embodiment of the present invention. VV sectional view taken on the line of FIG. VI-VI sectional view taken on the line of FIG. Sectional drawing at the time of opening of a package. The cross section is cut in the same direction as in FIG. Sectional drawing of the cover material which concerns on other embodiment of this invention. The cross section is cut in the same direction as in FIG. The top view of the lid | cover material which concerns on other embodiment of this invention. XX sectional drawing of FIG. The top view of the lid | cover material which concerns on other embodiment of this invention. XII-XII sectional view taken on the line of FIG. The reference figure which shows the procedure of the measuring method of a return angle. Sectional drawing which shows the base material produced by the Example and the comparative example. The reference drawing which shows the procedure of the 1st opening test of the cover material produced by the Example and the comparative example. The reference figure which shows the procedure of the 2nd opening test of the cover material produced by the Example and the comparative example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this specification, the description “PPP to QQQ” means “PPP or more and QQQ or less”.
1 and 2, the packaging body 1 includes a packaging material 2 in which an article 9 is stored, and a film-like lid material 3 attached to the surface of the packaging material 2.
A part of the packaging material 2 is formed with an outlet 5 for taking out the packaged article 9. The lid material 3 is attached to the surface of the packaging material 2 so as to be peelable and re-stickable while covering the outlet 5.

Specifically, the article 9 to be packaged in the package 1 of the present invention is not particularly limited, and is a food such as confectionery, a machine part such as a screw, a stationery such as a clip, or a quasi-drug such as a napkin. And liquid-containing products such as wet sheets.
As the liquid-containing product, various materials are known depending on the liquid to be impregnated and the material of the support impregnated with the liquid. For example, a wipe, a cleaning sheet, a wipe, a wipe, an oil removal sheet And makeup removal sheets.

These liquid-containing products are usually configured by stacking a plurality of wet sheets 91 in which sheets are impregnated with liquid, as shown in FIG.
The liquid is not particularly limited and is appropriately selected depending on the application. For example, liquids such as water, alcohol, surfactant, disinfectant, antibacterial agent, preservative, and fragrance are included. These may be used alone or in combination of two or more.
The sheet constituting the wet sheet is not particularly limited as long as it has liquid absorbency (water absorbency and / or oil absorbency). For example, a nonwoven fabric, a woven fabric, paper, porous material containing a material having liquid absorbency A quality sheet or the like can be used.
The package 1 in which the wet sheet 91 is packaged is also referred to as a wet sheet package.

The packaging material 2 is not particularly limited as long as it can store the article 9 and has an outlet 5 for taking out the article 9, but in cooperation with the lid 3 that closes the outlet 5, What can package the article 9 in a sealed state (sealed state in which liquid leakage and air do not enter) is preferable.
As the packaging material 2, a container that is not easily deformed by an external force such as a resin molded product, a flexible film bag such as a pillow packaging bag, or the like can be used.

In FIG.1 and FIG.2, the case where the film bag comprised from the film which has a softness | flexibility and liquid resistance is used as the packaging material 2 is illustrated. In the present invention, the film includes a single wafer generally called a sheet.
The material of the film is not particularly limited, and a conventionally known material can be used. For example, a synthetic resin film can be used. In particular, when a liquid-containing product is packaged as the article 9, it is preferable to use a laminated film having a base film having a gas barrier layer and a sealant layer. Examples of the base film include a synthetic resin film (for example, an aluminum-deposited polyethylene terephthalate film) on which aluminum is vapor-deposited. Examples of the sealant layer include a polyethylene film.
The thickness of the laminated film is usually about 30 μm to 100 μm.

  A film bag is formed by wrapping the periphery of the article 9 with the film and adhering the overlapping portion and both ends of the film (such as heat sealing). The form of the film bag is usually pillow packaging, but other forms may be used.

An outlet 5 is opened on one surface of the film bag (wrapping material 2).
As shown in FIG. 3, the outlet 5 is formed from a cut line 21 having an annular shape in plan view formed on one surface of the film bag. By removing the part surrounded by the cut line 21, the outlet 5 is formed.

Here, in this invention, a cut line means the line penetrated in the thickness direction of the film.
The cut line 21 having a ring shape in plan view is an endless cut line having substantially no end. The cut line 21 forming the outlet 5 can be formed in a substantially oval shape in plan view, a substantially circular shape in plan view, a substantially rectangular shape in plan view, a substantially triangular shape in plan view, or any other shape. .
The cut line 21 that forms the outlet 5 is preferably not completely endless (substantially endless with no end), and has a portion that does not penetrate in the thickness direction in part. A complete endless cut line 21 may be formed in the plane of the film bag, but in this case, a portion surrounded by the cut line 21 is an opening (hole) punched out. The part of the cut line 21 having a non-penetrating part in part is not removed by the part surrounded by the cut line when the cut line is formed, and the part surrounded by the cut line 21 is cut off together with the cover member 3 when the cover member 3 is peeled for the first time. , That portion becomes the outlet 5.

  However, the outlet 5 is not limited to the case where it is formed from the circular cut line 21 in plan view. For example, the end cut line formed in the film bag (for example, linear in plan view, zigzag in plan view, etc.) May be composed of a cut line). Further, the outlet 5 may be constituted by a hole formed in the film bag, or a perforation line formed in the film bag (such as a stitch mark of a sewing needle penetrating in the thickness direction of the film bag). A short cut line formed intermittently).

A reinforcing film 6 as shown in FIG. 3 may be provided on the surface of the packaging material 2. When the packaging material 2 is flexible, the reinforcing film 6 is provided in a region on the surface of the packaging material 2 and outside the outlet 5 in order to increase the rigidity of the flexible packaging material 2.
Specifically, the reinforcing film 6 is formed in a rectangular shape smaller than the area of one surface of the packaging material 2, and an opening that is substantially the same shape as the outlet 5 or slightly larger than the outlet 5 is formed in the surface. Is formed. The reinforcing film 6 is attached to one surface of the packaging material 2 with the extraction port 5 positioned in the opening so as not to block the extraction port 5, and is integrated with the packaging material 2.

The reinforcing film 6 is provided on at least a portion of the one surface of the packaging material 2 to which the lid material 3 is attached. Therefore, the reinforcing film 6 is interposed between the front surface of the packaging material 2 and the back surface of the adhesive layer of the lid material 3. Since the rigidity of the packaging material 2 is increased in the region where the reinforcing film 6 is provided, the flatness of the surface of the packaging material 2 in the region can be maintained, and the lid material 3 can be adhered to the surface of the packaging material 2 without a gap. it can.
The reinforcing film 6 is firmly bonded to the packaging material 2 so that the reinforcing film 6 follows the lid material 3 and is not peeled off from the packaging material 2 when the lid material 3 is peeled off. That is, the adhesive strength of the reinforcing film 6 to the surface of the packaging material 2 is greater than the adhesive strength of the lid member 3 to the surface of the reinforcing film 6. Preferably, the adhesive strength of the reinforcing film 6 to the surface of the packaging material 2 is 1.5 times or more of the adhesive strength of the lid member 3 to the surface of the reinforcing film 6.

The material of the reinforcing film 6 is not particularly limited, and a conventionally known synthetic resin film can be used. Especially, since it is excellent in rigidity, it is preferable to use polyester-type films, such as a polyethylene terephthalate, and a polyamide-type film.
Although the thickness of the reinforcement film 6 is not specifically limited, For example, they are 50 micrometers-200 micrometers. A commercial item can also be used for the reinforcement film 6, for example, the test film etc. which were used by the opening test of the following Example can be used.
The reinforcing film 6 may be opaque, but when the lid member 3 is peeled off, the reinforcing film 6 is colorless and transparent or colored and transparent so that the design printing provided on the surface of the packaging material 2 can be seen through the reinforcing film 6. Is preferred.

  As shown in FIGS. 1 and 2, the lid member 3 is detachably attached to the surface of the packaging material 2. In the present embodiment in which the reinforcing film 6 is provided on the surface of the lid member 3, the lid member 3 is attached to the surface of one surface of the packaging material 2 via the reinforcing film 6. Since the reinforcing film 6 is substantially integrated with the packaging material 2, when the reinforcing film 6 is provided in the present invention, the surface of the reinforcing film 6 is regarded as the surface of the packaging material 2.

As shown in FIGS. 4 to 6, the lid member 3 includes a flexible base material 7 formed in a predetermined planar shape, and an adhesive layer 8 provided on the back surface of the base material 7.
Specifically, the lid member 3 can be formed in an arbitrary plan view shape such as a substantially rectangular shape, a substantially triangular shape, a substantially circular shape, or a substantially elliptical shape.
In the present embodiment, the base material 7 of the lid member 3 is formed in a substantially rectangular shape in plan view. A knob 31 is extended from a part of the opening / closing direction start end 3 a of the lid 3.
The adhesive layer 8 is provided by applying an adhesive to the back surface of the substrate 7 except for the back surface of the knob 31.
Accordingly, most of the lid member 3 other than the knob portion 31 is a stickable region where it can adhere to the packaging material 2 via the adhesive layer 8.

The base material 7 includes a shape-retaining film 71 and may have other films as necessary. The base material 7 in the illustrated example includes a shape maintaining film 71 and a base film 72. Preferably, the base material 7 has gas barrier properties.
The shape-retaining film 71 and the base film 72 are laminated and bonded with an adhesive layer 73 made of an adhesive or an adhesive with an adhesive strength that does not cause delamination. When the shape maintaining film 71 and the base film 72 can be directly bonded, the adhesive layer 73 is omitted.
Design printing is applied to the front surface or the back surface of the base film 72. The shape retaining film 71 is laminated on the surface side of the base film 72 and functions as a protective film for the base film 72.
The shape holding film 71 may be opaque, but is preferably colorless and transparent or colored and transparent so that design printing provided on the surface of the base film 72 or the like can be seen through the shape holding film 71.

  The shape-retaining film 71 is a film that can be easily deformed by human power, and is a film that is creased after being folded and maintained without rebounding due to repulsion. Although the lid 3 is bent when the lid 3 is peeled off, the shape-retaining film 71 has a curl characteristic due to the bending stress. That is, the shape-retaining film 71 is significantly different from a heat-shrinkable film that produces curling characteristics by heating, and produces curling characteristics without applying heat.

  A conventionally known thermoplastic resin film can be used for the shape-retaining film 71, and examples of the material thereof include high-density polyethylene resin, medium-density polyethylene resin, low-density polyethylene resin, linear low-density polyethylene resin, and polypropylene resin. , Ethylene-propylene copolymer, ethylene-butene-1 copolymer, ethylene-pentene-1 copolymer, ethylene-hexene-1 copolymer, ethylene-octene-1 copolymer, ethylene-vinyl acetate copolymer Examples thereof include polyolefins such as a polymer, an ethylene- (meth) acrylic acid ester copolymer, an ethylene-vinyl chloride copolymer, and an ethylene-propylene-butene copolymer. The shape maintaining film 71 may have a single layer structure or a multilayer structure composed of two or more layers.

The thickness of the shape-retaining film 71 is not particularly limited, but if it is too thin, the shape-retaining property is not sufficient, and the effect of preventing the peeled lid 3 from returning sufficiently is not sufficiently achieved. On the other hand, if it is too thick, the flexibility is reduced. It is difficult to beat the lid 3. From such a viewpoint, the thickness of the shape maintaining film 71 is preferably 50 μm to 100 μm.
A commercially available product can also be used as the shape maintaining film 71. Commercially available products include Mitsui Chemical Co., Ltd. trade name “Technokeep (registered trademark)”, Futamura Chemical Co., Ltd. trade name “PE3K-BT”, and Sekisui Molding Industry Co., Ltd. trade name “Forte” (registered trademark). ) ".

The shape-retaining characteristics of the shape-retaining film 71 vary depending on the degree of bending return, but in the present invention, a shape-retaining film having a return angle of 0 to 40 degrees is preferable, and the return angle is more than 0 degrees and 30 A shape-retaining film having a degree of less than or equal to 20 degrees is more preferred, and a shape-retaining film having a return angle of more than 0 degree and not more than 20 degrees is particularly preferred.
The return angle is approximately half the vertical length (the opening and closing direction is vertical), and after folding and applying a load so that the surfaces overlap each other, after releasing the load, the folded upper half The angle formed by the lower half.
A specific method for measuring the return angle of the shape retaining film 71 is as in the following examples.

As the base film 72, a base material used in a conventional general label can be used, and a base material made of a synthetic resin is preferably used. Examples of the synthetic resin base material include a synthetic resin film and synthetic paper. The base film 72 is preferably a base material having gas barrier properties, and more preferably a synthetic resin base material having gas barrier properties. The base film 72 may have a single layer structure or a multilayer structure composed of two or more layers.
Although the thickness of the base film 72 is not specifically limited, For example, they are 20 micrometers-80 micrometers.

The return angle of the base material 7 constituting the lid 3 (in the case of the present embodiment, a laminated film of the shape-retaining film 71 and the base film 72) is preferably more than 0 degree and not more than 100 degrees, and more preferably 0 degree. More than 90 degrees or less is more preferable.
The return angle of the base material 7 is the angle formed by the upper half and the lower half of the base material 7 after being bent, similarly to the return angle of the shape retaining film 71.
A specific method for measuring the return angle of the substrate 7 is as in the following examples.

The adhesive layer 8 is provided on the back surface of the substrate 7 except for the knob 31.
The adhesive layer 8 is provided in a solid shape on the back surface of the substrate 7. However, the adhesive layer 8 may be provided on the back surface of the base material 7 in a myriad of dot-like and net-like shapes.

In the illustrated example, the adhesive layer 8 is not provided on the back surface of the knob 31, but the adhesive layer 8 is provided on the entire back surface of the base material 7 and the back surface of the knob 31 is not adhered. Is also possible.
For example, instead of the illustrated example, after the adhesive layer 8 is provided on the entire back surface of the substrate 7 including the back surface of the knob portion 31, a masking agent is applied to the back surface of the adhesive layer 8 corresponding to the back surface of the knob portion 31. It may be done (not shown). By providing the masking agent, the adhesiveness of the adhesive layer 8 is concealed, so that the back surface of the knob 31 can be prevented from sticking to the surface of the packaging material 2. The masking agent has a property of concealing the adhesive force of the adhesive. Examples of the masking agent include ultraviolet curable ink.

  The pressure-sensitive adhesive layer 8 is not particularly limited as long as it is a peelable and re-stickable pressure-sensitive adhesive, and a conventionally known one can be used. Examples of the pressure-sensitive adhesive include pressure-sensitive pressure-sensitive adhesives (pressure-sensitive pressure-sensitive adhesives), pressure-sensitive adhesives that generate pressure-sensitive adhesiveness by heating and remain adhesive after heat is removed (heat-sensitive pressure-sensitive adhesives), etc. Is mentioned.

The adhesive strength of the adhesive layer 8 to the surface of the packaging material 2 can be set as appropriate.
Preferably, the adhesive strength of the pressure-sensitive adhesive layer 8 (the cover material 3 attached via the pressure-sensitive adhesive layer 8) to the surface of the packaging material 2 is, for example, 1.5 N / 25 mm to 8 N / 25 mm, more preferably 2N / 25mm to 6N / 25mm. If the adhesive strength is less than 1.5 N / 25 mm, there is a risk that the cover 3 will not be sufficiently curled after the cover 3 is peeled off. On the other hand, if it exceeds 8 N / 25 mm, the curl is too large. May occur.
If the adhesive strength is within the preferable range as described above, a large bending stress is applied to the lid member 3 when the lid member 3 is peeled off, and an appropriate curl characteristic can be imparted to the lid member 3.

  The adhesive strength of the pressure-sensitive adhesive layer 8 is in accordance with JIS Z 0237. The lid 3 (test piece length 100 mm × width 25 mm) is attached to the surface of the packaging material 2 via the pressure-sensitive adhesive layer 8 and peeled off. It is measured in a peel test under conditions where the angle is 180 degrees, the peel speed is 300 mm / min, and the temperature is 23 ° C.

Further, in the surface of the opening / closing direction end portion 3b of the lid member 3, in order to prevent the opening / closing direction end portion 3b of the lid member 3 from being peeled off from the packaging material 2 when the lid member 3 is peeled off, A cut line 32 is formed. Such an anti-peeling cut line 32 is conventionally known in this type of lid material, and an appropriate shape can be adopted. In the example of illustration, the cut line 32 of the cover material 3 is provided in the both sides of the width direction, respectively, and is formed in planar view substantially U shape.
The cut-off lines 32 and 32 for peeling prevention are lines that penetrate in the thickness direction of the lid member 3, and are portions that do not penetrate in the thickness direction in part, similar to the cut lines 21 formed in the packaging material 2. You may have.
The width direction is a direction orthogonal to the opening / closing direction when the lid member 3 is viewed from the front side (in a plan view of the lid member 3).

By sticking the back surface of the adhesive layer 8 of the lid material 3 to the surface of the packaging material 2 (the surface of the reinforcing film 6), the outlet 5 of the packaging material 2 already stored in the article 9 is covered with the lid material 3. A package 1 is formed.
When opening the package 1, the knob 31 of the lid 3 is picked with one hand, and as shown in FIG. 7, the knob 31 of the lid 3 is reversed so that the knob 31 is reversed. By curving the lid material 3, at least a portion covering the outlet 5 is peeled off from the packaging material 2 while the terminal portion 3 b of the lid material 3 is attached to the packaging material 2.
Since the lid | cover material 3 of this invention contains the shape maintenance film 71, the shape when the lid | cover material 3 is curved is maintained. For this reason, even if the hand is released from the lid material 3 after the lid material 3 is peeled off from the packaging material 2, the start end 3 a side of the lid material 3 does not return to the surface of the packaging material 2.
Therefore, the article 9 can be taken out from the take-out port 5 by releasing the hand from the peeled lid member 3.

  In addition, the package of this invention is not restricted to the said embodiment, In the range which this invention intends, it can change suitably. Hereinafter, other embodiments of the package of the present invention will be described. However, in the description of the other embodiments, matters different from those of the above embodiment will be mainly described, and the same configurations and effects as those of the above embodiment may be omitted and terms and drawing numbers may be used. .

  The lid member 3 of the above embodiment is provided in the order of the adhesive layer 8, the base film 72, and the shape retaining film 71 in order from the bottom. For example, the adhesive layer 8, the shape retaining film 71, and the base film in order from the bottom. 72 may be provided in this order (not shown). The base film 72 is preferably a colorless transparent or colored transparent film, and the design printing is preferably provided on the back surface of the base film 72.

  Moreover, although the base material 7 of the cover material 3 of the said embodiment has the base film 72, as shown in FIG. 8, even if the base material 7 of the cover material 3 is comprised only with the shape maintenance film 71, for example. Good.

  Furthermore, when the base material 7 of the lid 3 is composed of a laminated film of the base film 72 and the shape holding film 71, the shape holding film 71 is provided over the entire surface of the base film 72 in the above embodiment. However, the present invention is not limited to this, and the shape maintaining film 71 may be provided on a part of the base film 72.

For example, as shown in FIGS. 9 and 10, the lid member 3 may be configured using a base material 7 that does not have the shape maintaining film 71 on both sides in the width direction of the lid member 3. In this case, the base material 7 has a shape-holding film 71 having a band shape in plan view extending from the opening / closing direction start end portion 3a to the terminal end portion 3b of the lid member 3, but only the base film 72 is present on both sides in the width direction of the lid member 3. Consists of. Although not particularly illustrated, the base material 7 that does not have the shape maintaining film 71 may be used on one side or the center of the lid member 3 in the width direction.
Since these base materials 7 have the shape holding film 71 over the entire opening and closing direction, when the cover material 3 is rolled up, the cover material 3 is curled as a whole, as in the above embodiment.

Moreover, for example, as shown in FIGS. 11 and 12, the lid member 3 may be configured using a base material 7 that does not have the shape maintaining film 71 at the opening / closing direction start end portion 3 a of the lid member 3. In the base material 7 in this case, the shape maintaining film 71 extends from the central portion in the opening / closing direction of the lid member 3 to the terminal portion 3b. Although not particularly illustrated, the base material 7 does not have the shape maintaining film 71 at the opening / closing direction start end portion 3a and the terminal end portion 3b of the lid member 3 (that is, the shape holding film 71 is provided in a predetermined range in the center portion of the opening / closing direction). You may use the base material 7 which does not have the shape maintenance film 71 in the opening-and-closing direction termination | terminus part 3b of the base material 7) or the cover material 3. FIG.
Since these base materials 7 also have the shape holding film 71, when the lid material 3 is rolled up, the lid material 3 is curled as a whole at the portion having the shape holding film 71.
When the shape holding film 71 is provided in a part of the lid member 3 in the opening / closing direction, it is preferable that the portion where the shape holding film 71 is provided includes an opening / closing direction end portion 3b as illustrated.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

[Film constituting base material]
(1) Shape-holding film: Product name “PE3K-BT” manufactured by Futamura Chemical Co., Ltd. Thickness 25 μm. Return angle 10 degrees.
(2) Polypropylene film (OPP): manufactured by Toyobo Co., Ltd., trade name “P2261”. Thickness 20 μm. Return angle 120 degrees.
(3) Biaxially stretched polyethylene terephthalate film: product name “E5100” manufactured by Toyobo Co., Ltd. Thickness 50 μm. Return angle 120 degrees.

[Measurement method of return angle]
The return angle of each film was measured as follows at a temperature of 23 ° C. (see also FIG. 13 for the procedure).
The sample is cut into length × width = 50 mm × 25 mm, and the position at which the length of the sample is halved is taken as a crease, and the sample is bent so that the surfaces of the samples overlap each other.
A 2 kg cylindrical roller is reciprocated once from above the folded sample.
After standing for 60 seconds, the angle formed by the upper half and the lower half of the folded sample is measured.
In addition, since the sample is flexible and the upper half hangs down as it moves away from the fold, the corner was measured at a location approximately 5 mm away from the fold.

[Example 1]
As shown in FIG. 14, the base material which consists of a 1st film, an acrylic adhesive, and a 2nd film in order from the bottom was prepared.
The biaxially stretched polyethylene terephthalate film was used as the first film, and the shape retention film was used as the second film.
An acrylic pressure-sensitive adhesive was applied to the back surface of the second film (application thickness 3 μm), and the first film was bonded to this to prepare a substrate.
It was 90 degree | times when the return angle of this base material was measured according to the said measuring method.

The base material of Example 1 is cut into length × width = 100 mm × 50 mm, and a pressure-sensitive pressure-sensitive adhesive having an adhesive strength of 5 N / 25 mm with respect to the test film used in the opening test on the back surface of the first film of the base material. 10 pieces of the lid material of Example 1 were produced.
The adhesive strength is in accordance with JIS Z 0237, the substrate is formed to 100 mm × 25 mm, and is attached to the surface of the test film via an adhesive, and the peeling angle is 180 degrees and the peeling speed is 300 mm / min. , And measured in a peel test under a temperature of 23 ° C.

[Example 2]
10 sheets in the same manner as in Example 1 except that a pressure-sensitive adhesive having an adhesive strength of 3 N / 25 mm with respect to the test film used in the opening test was used instead of the adhesive having an adhesive strength of 5 N / 25 mm. A lid was prepared.

[Example 3]
10 sheets in the same manner as in Example 1 except that a pressure-sensitive adhesive having an adhesive strength of 1 N / 25 mm for the test film used in the opening test was used instead of the adhesive having an adhesive strength of 5 N / 25 mm. A lid was prepared.

[Comparative example]
The biaxially stretched polyethylene terephthalate film was used as the first film of the substrate shown in FIG. 14, and the polypropylene film was used as the second film.
According to the measurement method, the return angle of this substrate was measured and found to be 120 degrees.
The base material of the comparative example was cut into length × width = 100 mm × 50 mm, and a pressure-sensitive adhesive having an adhesive strength of 5 N / 25 mm with respect to the test film used during the opening test was formed on the back surface of the first film of the base material. By coating, 10 lid materials were produced.

[First opening test]
A biaxially stretched polyethylene terephthalate film (trade name “E5100”, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm and having a 30 mm diameter hole in the plane was prepared as a test film.
The lid materials of the above Examples and Comparative Examples were bonded to each other through the respective pressure sensitive adhesives so as to cover the holes of the test film (FIG. 15 (a)). Next, as shown in FIG. 15 (b), the starting end of the lid member was rolled up and peeled off at 180 degrees in the longitudinal direction of the lid member at a peeling rate of 300 mm / min until just before the end of the lid member. .

Then, the state of the lid member after detaching the hand from the lid member and leaving it for 60 seconds was observed.
In all of the five cover materials of Example 1, the entire peeled portion was separated from the hole of the test film and curled greatly toward the end of the cover material, and the hole was not blocked by the cover material.
In all of the five cover materials of Example 2, the entire peeled portion is separated from the hole of the test film and curls small toward the end of the cover material (curls smaller than in Example 1), and the hole is formed by the cover material. It wasn't blocked.
The lid materials of Example 3 and Comparative Example were hardly curled and closed the holes in the test film.

[Second opening test]
Similarly to the first opening test, the lid materials of the above examples and comparative examples are bonded to each other through the pressure-sensitive adhesives, and the start end portion of the lid material is rolled up to just before the end portion of the lid material. The film was peeled off at 180 ° in the longitudinal direction of the lid member at a peeling speed of 300 mm / min.
In the second opening test, the bent portion bent 180 degrees in the vicinity of the terminal end portion of the peeled lid member is manually pressed to the extent that a folding line is generated over the entire width direction as shown in FIG. After that, the state of the lid member after releasing the hand and leaving it for 60 seconds was observed.

As for the cover material of Example 1, all the five peeling materials curl the whole peeling part largely similarly to the 1st opening test, and also incline toward the termination part side so that the peeling part is far from the hole at the applied fold line. The hole was not blocked by the lid.
As for the cover material of Example 2, all the five peeling materials curl small like the first opening test, and further tilt toward the end portion so that the peeling portion is away from the hole at the applied fold line. The hole was not blocked by the lid.
The cover material of Example 3 hardly curls, and the entire peeled portion is separated from the hole of the test film and rises in a direction substantially orthogonal to the surface of the test film. It wasn't blocked.
As for the cover material of the comparative example, all five sheets closed the hole of the test film.

  DESCRIPTION OF SYMBOLS 1 ... Packaging body, 2 ... Packaging material, 3 ... Cover material, 7 ... Base material, 71 ... Shape retention film, 72 ... Base film, 8 ... Adhesive layer, 9 ... Article

Claims (3)

A packaging material having an outlet for taking out the article, and a film-like lid member attached to the surface of the packaging material so as to cover the outlet and is detachable and re-adherable.
The packaging body in which the said film-form lid | cover material contains a shape maintenance film.   The package body according to claim 1, wherein a return angle of the shape maintaining film is 0 to 40 degrees.   The package of Claim 1 or 2 whose adhesive strength with respect to the surface of the said packaging material of the said cover material is 1.5N / 25mm-8N / 25mm.

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