JP2018127236A - Packing material and package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing material and a package which can maintain sufficient adhesive force even after repeated attaching and detaching.SOLUTION: A package 1 comprises a packing material 2 and an item 10 stored inside the packing material 2. The packing material 2 is equipped with a bag-like packing main body 3 and a lid body 4 which closes an opening 22 formed in the packing main body 3. An adhesive layer 5 is formed on the inner surface of the lid body 4. The adhesive layer 5 contains binder and oil absorbent which can absorb oil components.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging material and a package.

  A pressure-sensitive adhesive film having a re-peelable pressure-sensitive adhesive layer (re-peelable pressure-sensitive adhesive film) is easy to handle, and is used for various labels, lids, and the like (for example, see Patent Document 1).

  However, with conventional re-peelable pressure-sensitive adhesive films, the adhesive strength to the adherend is remarkably increased when the sticking / peeling is repeated a number of times, the pressure-sensitive adhesive layer is touched with a finger, or the oil component contacts the pressure-sensitive adhesive layer. There was a problem that the required adhesive strength could not be maintained.

JP 2013-241614 A

  An object of the present invention is to provide a packaging material and a package that can sufficiently maintain the adhesive force even when pasting and peeling are performed a plurality of times.

Such an object is achieved by the present invention described in the following (1) to (12).
(1) A packaging material main body having a space for accommodating stored items therein, a lid that closes an opening for taking out the stored items from the packaging material main body, and an adhesive that joins the packaging material main body and the lid. A packaging material having an agent layer,
All or a part of the pressure-sensitive adhesive layer has a pressure-sensitive adhesive and an oil absorbent that can absorb an oil component.

(2) The packaging material body has an easily breakable portion, and the opening is formed by breaking the easily breakable portion,
The said adhesive layer is a packaging material as described in said (1) currently formed in the said cover body side.

(3) The opening is formed in the packaging material body,
The said adhesive layer is a packaging material as described in said (1) currently formed in the area | region surrounding the said opening of the said packaging material main body.

  (4) The packaging material according to any one of (1) to (3), wherein the pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive composition including a pressure-sensitive adhesive and an oil absorbent capable of absorbing an oil component. .

  (5) The packaging material according to any one of (1) to (4), wherein the stored item includes an oil component.

  (6) The packaging material according to any one of (1) to (5), wherein the oil absorbing material is a polymer compound having a plurality of alicyclic structures in a repeating unit.

（ただし、式（１）中、ｎは２以上の整数、ｍは１以上４以下の整数を示す。） (7) The packaging material according to (6), wherein the oil absorbent has a chemical structure represented by the following formula (1).

(In the formula (1), n represents an integer of 2 or more, and m represents an integer of 1 to 4)

  (8) The content of the oil absorbent in the pressure-sensitive adhesive layer is 0.1 to 50 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive. The packaging material described.

  (9) The packaging material according to any one of (1) to (8), wherein the pressure-sensitive adhesive contains a monomer having an aliphatic hydrocarbon group having 5 or more carbon atoms as a constituent component.

  (10) The packaging material according to any one of (1) to (9), wherein the pressure-sensitive adhesive layer further includes a plasticizer having an alkylene group having 4 or more carbon atoms in the molecule.

  (11) Any of the above (1) to (10), wherein the pressure-sensitive adhesive layer has a first region and a second region having an adhesive strength with respect to an adherend that is larger than that of the first region. Packaging material according to crab.

  (12) A packaging body comprising the packaging material according to any one of claims 1 to 11 and a stored item stored in the space of the packaging material.

  ADVANTAGE OF THE INVENTION According to this invention, even if it sticks and peels several times, the packaging material and package which can fully maintain adhesive force can be provided.

It is a perspective view which shows 1st Embodiment of the package (wrapping material) of this invention. It is a cross-sectional side view in the state (when not using) which closed the cover body of the package shown in FIG. It is a cross-sectional side view in the state (at the time of use) which opened the cover body of the package shown in FIG. It is a top view which shows the structural example of a cover body. It is a cross-sectional side view which shows the structural example of an adhesive layer. It is a perspective view which shows 2nd Embodiment of the package of this invention. It is a cross-sectional side view in the state which closed the cover body of the package shown in FIG. It is a cross-sectional side view in the state which opened the cover body of the package shown in FIG.

Hereinafter, it explains in detail based on a suitable embodiment of the present invention.
<First Embodiment>
FIG. 1 is a perspective view showing a first embodiment of a packaging body (packaging material) according to the present invention, and FIG. 2 is a sectional side view of the packaging body shown in FIG. 1 in a closed state (when not in use). FIG. 3 is a cross-sectional side view of the packaging body shown in FIG. Hereinafter, based on these drawings, a packaging material and a packaging body according to a first embodiment of the present invention will be described. In the following description, the upper side in FIGS. 2 and 3 is referred to as “upper”, the lower side is referred to as “lower”, the left side in FIGS. 1 to 3 is referred to as “base end part”, and the right side is referred to as “tip part”. say.

[Composition of packaging (wrapping material)]
As shown in FIGS. 1 to 3, the packaging body 1 of the present invention includes a packaging material 2 and a stored item 10 stored in a space S formed inside the packaging material 2.

  The storage 10 is not particularly limited, but in the present embodiment, it is a dry or liquid-impregnated sheet (wet sheet) 11, and a plurality of sheets (for example, such a sheet 11 is folded in a desired manner) (for example, , 6 to 100 sheets). Specific examples of the sheet 11 impregnated with liquid include a wet tissue, a makeup remover sheet, an oil removing paper, a medicinal paper, an antibacterial paper, a wipe, a car paper, a window paper, and a toilet cleaning paper.

  The liquid impregnated in the sheet 11 is appropriately determined depending on its use. For example, moisture, oil components (for example, cleansing oil, paraffin, liquid paraffin, wax, petrolatum, ceresin, montan wax, jojoba seed oil, castor Oil), volatile components such as alcohol, surfactants, lotions, moisturizing components such as glycerin, fragrances, antibacterial agents and the like. Among these, cleansing oils include those containing mineral oil and silicone oil.

  In particular, the sheet 11 preferably includes an oil component. In this case, the effect of this invention by the adhesive layer 5 mentioned later having an oil absorber can be exhibited more effectively.

  In the present invention, it goes without saying that the sheet 11 is not limited to one impregnated with a liquid.

  The packaging material 2 includes a packaging material main body 3 and a lid body 4. The packaging material body 3 has a space S in which the stored item 10, that is, a plurality of sheets 11 is accommodated, and a sheet material 31 (film) having a desired shape is appropriately formed, joined, etc. It is a thing. For example, both ends of the cylindrical sheet material 31 are sealed by fusing (thermal fusing, high frequency fusing, ultrasonic fusing, etc.) or bonding to form the sealing portion 32, It is a thing.

  The sheet material 31 is preferably flexible, and examples of the constituent material thereof include polyolefins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer (EVA); polyethylene terephthalate (PET), poly Polyester such as butylene terephthalate; acetate resin, acrylonitrile-butadiene-styrene copolymer (ABS), polystyrene, polyvinyl chloride, polyamide, polyesteramide, polyether, polyimide, polyamideimide, poly-p-phenylene sulfide, polyether ester, etc. These resin materials can be used, and one or two or more selected from these can be used in combination.

  The sheet material 31 may be a single layer or a laminate of a plurality of layers. When the sheet | seat material 31 is comprised by the laminated body, what laminated | stacked the layer of 2 or more types of different resin among the resin materials illustrated above is mentioned. Moreover, you may use what joined the metal layer (for example, metal foil, a metal vapor deposition layer, etc.) to the resin layer. As for the kind of metal which comprises a metal layer, aluminum or aluminum alloy, stainless steel, etc. are mentioned, for example.

  As described above, the sheet material 31 is formed of a laminate, and in particular, the laminate has a metal layer, thereby improving the gas impermeability (gas barrier property) of the sheet material 31 and imparting ultraviolet impermeability. It is possible to improve the storage stability of the stored item 10.

  In addition, the sheet material 31 may be subjected to various surface treatments, for example, a surface treatment for improving adhesion with the pressure-sensitive adhesive layer 5. For example, the surface treatment for improving the adhesiveness and airtightness with the pressure-sensitive adhesive layer 5 is performed on at least a portion of the sheet material 31 to which the pressure-sensitive adhesive layer 5 is adhered (the upper surface of the outer peripheral portion 24 and the upper surface of the broken piece 23). It may be given.

  Various functional layers such as a printing layer (printing coat layer) for printing characters and graphics, a protective layer, a layer for improving surface properties (gloss etc.) are provided on the surface of the sheet material 31. It may be provided. Such a functional layer may also be provided on the upper surface of the lid 4.

  The thickness of the sheet material 31 is not particularly limited, but is preferably 15 μm or more and 500 μm or less, and more preferably 20 μm or more and 100 μm or less.

  When such a packaging material body 3 is used, an opening 22 for taking out the sheet 11 as the stored item 10 is formed. FIG. 2 shows a state where the package 1 is not used, that is, before the lid 4 is closed and the opening 22 is formed. As shown in FIG. 2, an easily breakable portion 21 made of, for example, a half cut, a notch (a V-shaped groove), a perforation, or the like is linearly provided on the top of the packaging material body 3. The easily breakable portion 21 has a breaking strength smaller than other portions of the sheet material 31 (in the vicinity of the easily breakable portion 21), and when an external force is applied, the sheet material 31 is broken at the easily breakable portion 21 and opened. Is done. The easily breakable portion 21 is formed in a shape corresponding to the outline of the opening 22 (for example, a circle, an ellipse, an oval shape, or a rectangle), and after the breakable portion 21 is broken, the easily breakable portion of the sheet material 31 is formed. A portion surrounded by 21 (a portion inside the easily breakable portion 21) becomes a broken piece 23.

  The lid 4 is for closing the opening 22 and is made of a sheet material (film) having the same flexibility as the sheet material 31. Examples of the constituent material of the lid 4 include the same constituent materials as those of the sheet material 31 described above, and the preferable thickness thereof is the same as the thickness of the sheet material 31 described above. In addition, the sheet material which comprises the cover body 4 and the sheet material 31 which comprises the packaging material 2 may differ in a constituent material and thickness.

  The lid body 4 has a base end portion 41 located on the left side in FIG. 2 and a tab 42 at the opposite end portion (tip end portion). The tab 42 is pinched with a finger and the lid 4 is lifted upward from the distal end side to form (open) the opening 22 or perform an operation of exposing the already formed opening 22. In the case of this operation, the base end part 41 of the cover body 4 does not peel off the pressure-sensitive adhesive layer 5 immediately below, but maintains the sticking state. Thereby, when taking out the sheet | seat 11 from the opening 22, the cover body 4 maintains the connection state with the packaging material main body 3 in the base end part 41. FIG.

  A pressure-sensitive adhesive layer 5 to be described in detail later is formed (joined) by, for example, coating on the lower surface of the lid 4 (the surface on the side of the packaging material main body 3). The lid 4 is joined. The pressure-sensitive adhesive layer 5 is formed in a portion excluding the tab 42 on the lower surface of the lid body 4.

  The pressure-sensitive adhesive layer 5 may be directly formed (joined) on the lower surface of the lid 4, but at least one intermediate layer (not shown) is provided between the pressure-sensitive adhesive layer 5 and the lid 4. It may be interposed. Examples of the intermediate layer include one for increasing the bonding strength of the pressure-sensitive adhesive layer 5 to the lid 4 (for example, an adhesive layer and a strong pressure-sensitive adhesive layer).

  Further, the lower surface of the lid 4 (bonding surface of the pressure-sensitive adhesive layer 5) may be subjected to a surface treatment for increasing the bonding strength with the pressure-sensitive adhesive layer 5. As such a surface treatment, for example, an oxidation method, a concavo-convex method, or the like can be given. Examples of the oxidation method include corona discharge treatment (corona treatment), chromic acid treatment (wet), flame treatment, hot air treatment, ozone / ultraviolet irradiation treatment, and the like. And solvent treatment methods.

  These surface treatment methods are appropriately selected according to the constituent material of the lid body 4, but in general, corona treatment is preferable in terms of effects and operability. Further, as another method of the surface treatment, a primer treatment can be performed.

  The bonding strength of the pressure-sensitive adhesive layer 5 to the lid body 4 is greater than the bonding strength to the packaging material body 3 (preferably 1.2 times or more and 50), regardless of whether the intermediate layer is formed or surface treatment is performed. Times less). Thereby, when performing the operation of lifting the lid 4 from the tab 42 side and forming (opening) or exposing the opening 22, the pressure-sensitive adhesive layer 5 is maintained in a state of being joined to the lid 4 side, Peel from the packaging material body 3. In particular, the adhesive residue on the packaging body 3 side, that is, the residue on the surface of the outer peripheral portion 24 of the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 5 is also prevented.

  As shown in FIG. 2, when the packaging body 1 is not used, the easily breakable portion 21 is not broken, and the adhesive layer 5 formed on the lid body 4 is adhered to the upper surface of the packaging body 3. ing. The pressure-sensitive adhesive layer 5 is formed in a region including the easily breakable portion 21, that is, the opening 22 to be formed later. The pressure-sensitive adhesive layer 5 and the lid body 4 make the easily breakable portion 21, its inner portion (breaking piece 23 and And the outer peripheral portion 24 of the easily breakable portion 21 are covered.

  From this state, when the tab 42 is pinched with a finger and the lid 4 is lifted upward from the distal end side, the adhesive layer 5 is bonded to the lid 4 side as shown in FIGS. It peels from the packaging material main body 3 while maintaining. At this time, the inner part of the easily breakable portion 21, that is, the portion that becomes the broken piece 23 is kept attached to the lower surface of the pressure-sensitive adhesive layer 5 and is lifted together with the lid body 4. It breaks gradually and the opening 22 is formed (opened). The adhesive layer 5 is peeled off at the outer peripheral portion 24 that is near the outside of the easily breakable portion 21. The pressure-sensitive adhesive layer 5 is left at the base end portion 41 of the lid body 4 (the pressure-sensitive adhesive layer 5 at the base end portion 41 is maintained without being peeled off from the sheet material 31), and the pressure-sensitive adhesive layer 5 is peeled off from the outer peripheral portion 24 of the easily breakable portion 21 of the sheet material 31, almost the entire easily breakable portion 21 is broken, and the broken piece 23 is adhered to the adhesive layer 5 (moves to the lid 4 side). Together with this, an opening 22 is formed. In this way, the packaging material 2 is opened.

  When the packaging material 2 is opened as described above, the uppermost sheet 11 of the stored items 10 can be picked with a finger and taken out from the opening 22. The sheets 11 are usually taken out one by one, but a plurality of sheets may be taken out at the same time.

  After the sheet 11 is taken out, the lid 4 is returned to the original state (the state shown in FIG. 2). That is, the pressure-sensitive adhesive layer 5 is adhered again to the outer peripheral portion 24 (region surrounding the opening 22) of the opening 22 formed in the sheet material 31 located on the upper side of the packaging material body 3. Thereby, the opening 22 is sealed. At this time, the broken piece 23 returns to the inside of the opening 22 to seal the opening 22, and the adhesive layer 5 is preferably closely adhered to the outer peripheral portion of the opening 22 of the sheet material 31 without a gap. Sealability can be secured. This prevents the liquid impregnated in the stored item 10 from being volatilized and being diffused outside the packaging material 2 (the stored item 10 is dried) during subsequent storage. Further, it is possible to prevent dust, dust, bacteria, etc. from entering the packaging material 2 from the outside during storage and contaminating the stored items 10.

  In this way, when the sheet 11 is next taken out from the state in which the opening 22 is sealed by the lid 4 (the state shown in FIG. 2), the tab 4 is lifted from the tip end side by pinching the tab 42 with a finger. When lifted up, the pressure-sensitive adhesive layer 5 is peeled off from the outer peripheral portion 24 while maintaining the state of being bonded to the lid 4 side. Since the easily breakable portion 21 has already been broken, the broken piece 23 is also lifted together with the lid 4 while maintaining the state of being stuck to the adhesive layer 5, and the opening 22 is gradually exposed from the tip end side. When the pressure-sensitive adhesive layer 5 is peeled off from the outer peripheral portion 24 while leaving the pressure-sensitive adhesive layer 5 at the base end portion 41 of the lid 4, almost the entire opening 22 is exposed. In this way, the packaging material 2 is again opened. Thereby, the sheet | seat 11 in the uppermost part can be taken out again.

  After the sheet 11 is taken out, the pressure-sensitive adhesive layer 5 is attached again to the outer peripheral portion 24 of the opening 22 and the lid 4 is closed (returns to the original state shown in FIG. 2). Thereby, the opening 22 is sealed again. Thus, although the operation | work which takes out the sheet | seat 11 is performed in multiple times, whenever the sheet | seat 11 is taken out, peeling and sticking from the outer peripheral part 24 of the adhesive layer 5 are performed. That is, in the package 1, peeling and sticking from the outer peripheral portion 24 of the pressure-sensitive adhesive layer 5 are repeatedly performed (hereinafter referred to as “multiple peeling / sticking operations”). This number of times may correspond to the number of sheets 11 stored in the unused packaging material 2.

  Next, the configuration of the pressure-sensitive adhesive layer 5 will be described. The pressure-sensitive adhesive layer 5 is formed on the lower surface (back surface) of the lid body 4 using the lid body 4 as a base material. And the cover body 4 and the adhesive layer 5 comprise the adhesive body 6 which uses the packaging body main body 3 as a to-be-adhered body. The pressure-sensitive adhesive layer 5 (all or a part of the pressure-sensitive adhesive layer 5; hereinafter the same) has a pressure-sensitive adhesive and an oil absorbent that can absorb an oil component (hereinafter sometimes simply referred to as “oil”). doing.

  In this embodiment, the adhesive layer 5 is comprised with the adhesive composition containing an adhesive and the oil absorber which can absorb an oil component. The oil component includes an emulsified oil component.

  The type of the pressure-sensitive adhesive layer 5 is not particularly limited. However, as described above, since the peeling and sticking are repeated a plurality of times with respect to the packaging body body 3 that is the adherend, A pressure-sensitive adhesive layer is preferred. Therefore, the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 5 is preferably a re-peelable pressure-sensitive adhesive composition. Details will be described below.

[Adhesive composition (re-peelable adhesive composition)]
As described above, the pressure-sensitive adhesive composition is preferably a re-peelable pressure-sensitive adhesive composition. In the present invention, the “re-peeling type” refers to a material that can be repeatedly attached and peeled (multiple times) to the adherend (the outer peripheral portion 24 of the opening 22 of the packaging material 2).

  The re-peelable pressure-sensitive adhesive composition in the present invention includes a pressure-sensitive adhesive and an oil absorbent that can absorb an oil component.

  Thus, by including the oil absorbent, when the surface (lower surface) of the pressure-sensitive adhesive layer 5 comes into contact with the oil, the oil is efficiently absorbed and held, and the outer peripheral portion 24 (adhered body) of the pressure-sensitive adhesive layer 5 ), The amount of oil present on the contact surface can be reduced. As a result, even when it comes into contact with the oil, the adhesive force to the outer peripheral portion 24 can be maintained satisfactorily, that is, the sealing property of the packaging material 2 can be maintained higher, and the above-described effects are exhibited. Is done.

  The reason why the surface (lower surface) of the pressure-sensitive adhesive layer 5 is in contact with oil is as follows. First, when the sheet 11 is taken out from the opening 22, the sheet 11 touches the surface of the pressure-sensitive adhesive layer 5 and is included in the sheet 11. Second, when the sheet 11 is taken out from the opening 22, the sheet 11 touches the surface (upper surface) of the outer peripheral portion 24, and the oil component contained in the sheet 11 is there. When the cover 4 is closed after that, the surface (lower surface) of the pressure-sensitive adhesive layer 5 comes into contact with the oil attached to the surface (upper surface) of the outer peripheral portion 24. Third, the finger is the pressure-sensitive adhesive. When the surface of the layer 5 is touched, the oil component (including the oil component secreted from the human body) adhering to the finger moves to the adhesive layer 5 and adheres.

  Here, the oil component is not particularly limited. For example, a hydrocarbon having 5 or more carbon atoms, a fatty acid having 5 or more carbon atoms, or an ester compound thereof (an ester with a polyhydric alcohol such as glycerin (for example, triglyceride) And other silicone oils (eg, methicone, cyclomethicone, etc.).

  Oil components include vegetable oils such as olive oil, sesame oil, and jojoba oil, animal oils such as fish oil, lard, and oil secreted from the skin, in addition to mineral oil and synthetic oil.

  Examples of the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 5, particularly the pressure-sensitive adhesive contained in the re-peelable pressure-sensitive adhesive composition (hereinafter simply referred to as “pressure-sensitive adhesive”) include acrylic, synthetic rubber, and natural rubber. Among them, an acrylic pressure-sensitive adhesive or a material mainly composed of this is preferable.

  Thereby, the adhesiveness with respect to the sheet | seat material 31 (to-be-adhered body) can be made more excellent, and sufficient adhesive force can be ensured. In particular, sufficient adhesive force can be maintained even for a plurality of peeling / sticking operations.

  The acrylic pressure-sensitive adhesive is acrylic acid, methacrylic acid (hereinafter collectively referred to as “(meth) acrylic acid”) or an ester compound thereof (acrylate, methacrylate (hereinafter collectively referred to as “(meth)). It is also referred to as “acrylate”.))) Or the like as long as it contains a (meth) acrylic acid derivative as a monomer component, and may contain monomer components other than those described above.

  The pressure-sensitive adhesive preferably contains a monomer having an aliphatic hydrocarbon group having 5 or more carbon atoms as a constituent component. Thereby, the lipophilicity as the whole adhesive composition (especially re-peelable adhesive composition) becomes more excellent. As a result, coupled with the effect of including an oil absorbing material that will be described in detail later, the absorbed oil can be more suitably held inside, and the adhesive holding effect when contacting the oil is more excellent. can do. In addition, the affinity between the pressure-sensitive adhesive and the oil absorbing material (particularly, the oil absorbing material that is a polymer compound having a plurality of alicyclic structures) can be made more excellent. The intended compositional variation can be prevented more effectively, and a more stable oil absorption function is exhibited at each part.

  As described above, the pressure-sensitive adhesive preferably contains a monomer having an aliphatic hydrocarbon group having 5 or more carbon atoms as a constituent component, but the aliphatic hydrocarbon group has 6 or more carbon atoms. More preferably, it is 8 or more and 16 or less. Thereby, the effects as described above are more remarkably exhibited.

  The aliphatic hydrocarbon group may have a cyclic structure or a branched chain structure, but preferably has a linear structure. Thereby, the effects as described above are more remarkably exhibited.

  The proportion of the monomer having an aliphatic hydrocarbon group in the molecule (polymer) constituting the pressure-sensitive adhesive is preferably 50% by mass or more, and more preferably 60% by mass or more. Thereby, the effects as described above are more remarkably exhibited.

  Examples of the monomer component constituting the acrylic pressure-sensitive adhesive include (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and dodecyl (meth). An acrylate etc. are mentioned, Among these, a dodecyl (meth) acrylate is preferable.

  Thereby, the lipophilicity as the whole adhesive composition (especially re-peelable adhesive composition) becomes more excellent. As a result, coupled with the effect of including an oil absorbing material that will be described in detail later, the absorbed oil can be more suitably held inside, and the adhesive holding effect when contacting the oil is more excellent. can do. In addition, the affinity between the pressure-sensitive adhesive and the oil absorbent (especially, the oil absorbent that is a polymer compound having a plurality of alicyclic structures) can be improved, and in the re-peelable pressure-sensitive adhesive composition This makes it possible to more effectively prevent unintentional compositional variation in the oil and to exhibit a more stable oil absorbing function at each part.

  It is preferable that the content of the monomer having a polar group (for example, a hydroxyl group, a carboxyl group, an amino group, or a salt thereof) in the molecule (polymer) of the acrylic pressure-sensitive adhesive is sufficiently low.

  More specifically, the content of the monomer having a polar group in the molecule (polymer) of the acrylic pressure-sensitive adhesive is preferably 10% by mass or less, more preferably 5% by mass or less. More preferably, it is at most mass%.

Thereby, the lipophilicity as the whole adhesive composition (especially re-peelable adhesive composition) becomes more excellent. As a result, coupled with the effect of including an oil absorbing material that will be described in detail later, the absorbed oil can be more suitably held inside, and the adhesive holding effect when contacting the oil is more excellent. can do.
As the adhesive, either a solvent type or an emulsion type may be used.

  The pressure-sensitive adhesive composition (particularly, the re-peelable pressure-sensitive adhesive composition) preferably contains a cross-linked pressure-sensitive adhesive crosslinked with a cross-linking agent as the pressure-sensitive adhesive.

  Thereby, the cohesion force of the adhesive layer 5 can be made more excellent, and the adhesive residue at the time of peeling from an adherend can be prevented more effectively.

  Examples of the crosslinking agent include aliphatic isocyanate compounds, aromatic isocyanate compounds, epoxy compounds, metal chelate compounds, aziridine compounds and other polyimine compounds, melamine resins, urea resins, dialdehydes, methylol polymers, metal alkoxides, metal salts. Etc. can be used. More specifically, for example, hexamethylene diisocyanate (HMDI) or the like or an aliphatic isocyanate compound that is a derivative thereof, aluminum chelate compound such as aluminum-isopropylate, aluminum-sec butyrate, aluminum acetylacetonate, tetraisopropyl titanate, Examples thereof include metal chelate compounds such as titanium chelate compounds such as tetrakis (2-ethylhexoxy) titanate.

  Although content of a crosslinking agent is not specifically limited, It is preferable that they are 1.5 mass parts or more and 7.5 mass parts or less with respect to 100 mass parts of polymer components of an adhesive main ingredient, and 2 mass parts or more and 6.5 mass parts. More preferably, it is 3 parts by mass or less and 6 parts by mass or less.

  As a result, re-peeling, that is, suitable adhesive force suitable for a plurality of peeling / sticking operations (appropriate without excess or deficiency) can be obtained, and the generation of adhesive residue on the outer peripheral portion 24 can be more effectively prevented. Can do.

  The oil absorbent material possessed by the pressure-sensitive adhesive layer 5 has a function of absorbing the oil component and taking in the oil component in contact with the surface of the pressure-sensitive adhesive layer 5 into the pressure-sensitive adhesive layer 5 (inside the pressure-sensitive adhesive composition). Preferably there is.

  When the pressure-sensitive adhesive layer 5 has such an oil absorbing material, when the pressure-sensitive adhesive layer 5 comes into contact with the oil, the remaining amount of oil on the surface can be reduced, and the sheet material 31 that is the adherend is formed. Adhesion (adhesive force) with the outer peripheral part 24 can be maintained satisfactorily.

  The oil absorbent material may be any material as long as it has the functions described above. For example, a porous body having pores (including filler aggregates) and oil are absorbed. And a gelling agent that swells and gels.

  Such an oil absorbing material can take in oil into the oil absorbing material with higher efficiency, and can hold the state more appropriately. Therefore, by using such an oil absorbing material, the effects as described above are more remarkably exhibited.

  In the oil absorbent material composed of the porous body, the porosity is not particularly limited, but is preferably 10% by volume or more and 80% by volume or less, and more preferably 15% by volume or more and 70% by volume or less. preferable.

  Thereby, while being able to absorb more oil, the mechanical strength of a porous body can fully be ensured and the oil component absorbed more stably can be hold | maintained.

  As a constituent material of the porous body, for example, calcium silicate, calcium carbonate, diatomaceous earth, silicon dioxide (silica), aluminum oxide (alumina), montmorillonite, kaolin and other clay minerals, various glasses, various metals, salt, etc. Inorganic compounds, low molecular organic compounds such as calcium lactate and lactose, starches such as dextrin, processed starch and porous starch, cellulose derivatives such as crystalline cellulose, methylcellulose and cellulose ether compounds, and polyvinyl alcohol.

  The porous body may be subjected to a surface treatment such as a hydrophobization treatment (lipophilic treatment). Thereby, the affinity between the porous body and the oil is improved, and the porous body can absorb and retain the oil component with higher efficiency.

  In particular, when the oil absorbing material is a porous body, it is preferable that the inner wall surfaces of the pores are subjected to a hydrophobic treatment. Thereby, the effect mentioned above is exhibited more notably.

  Examples of such hydrophobic treatment include, for example, a method of treating with a coupling agent such as a silane coupling agent or a titanate coupling agent, a metal soap treatment method using a zinc salt, a magnesium salt or an aluminum salt of a fatty acid. Is mentioned.

  Further, as the oil absorbing material, a polymer compound having a plurality of alicyclic structures may be used in the repeating unit.

  Thereby, the affinity between the oil absorbing material and the oil component is improved, and the oil absorbing material can absorb and retain the oil component with higher efficiency. In addition, such an oil absorbent has an affinity with the above-described pressure-sensitive adhesive (particularly, a pressure-sensitive adhesive as a polymer containing a monomer having an aliphatic hydrocarbon group having 5 or more carbon atoms as a constituent component). This is particularly excellent, can prevent the unintentional compositional variation in the pressure-sensitive adhesive layer 5 more effectively, and exhibits a more stable oil absorbing function at each part.

  In particular, the oil absorbing material preferably has a chemical structure represented by the following formula (1).

（ただし、式（１）中、ｎは２以上の整数、ｍは１以上４以下の整数を示す。）
これにより、前述したような効果がより顕著に発揮される。

(In the formula (1), n represents an integer of 2 or more, and m represents an integer of 1 to 4)
Thereby, the effects as described above are more remarkably exhibited.

  The pressure-sensitive adhesive layer 5 (pressure-sensitive adhesive composition) may have a plurality of types of oil absorbing materials. Thereby, these act synergistically and the effects as described above are more remarkably exhibited. In particular, when a plurality of types of oil absorbing materials having different action mechanisms are combined (for example, a porous body and a polymer compound having a plurality of alicyclic structures in a repeating unit, etc.) Becomes even more prominent. More specifically, for example, as an oil absorber, a component mainly contributing to rapid oil absorption (for example, a polymer compound having a plurality of alicyclic structures in a repeating unit) and an adhesive layer Including components that have a function of storing absorbed oil (for example, porous bodies), the oil moves between these components, so that the oil can be absorbed quickly and the oil can exude for a long time. It is possible to achieve both prevention and stability, and an excellent effect can be stably obtained over a long period of time.

  The content of the oil absorbent in the pressure-sensitive adhesive layer 5 (in the pressure-sensitive adhesive composition) is not particularly limited, but is preferably 0.1 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the pressure-sensitive adhesive. It is more preferably 1 part by mass or more and 30 parts by mass or less, and further preferably 5 parts by mass or more and 20 parts by mass or less.

  If the content of the oil absorbent is too low, depending on the type of oil absorbent used, or if the amount of oil components attached is excessive, the effect of including the oil absorbent as described above will be sufficiently exerted. It may not be. In addition, if the content of the oil absorbent is too high, the content of the pressure-sensitive adhesive is relatively reduced, and the function of the pressure-sensitive adhesive, in particular, the function of sufficiently maintaining the pressure-sensitive adhesive force due to frequent adhesion of oil components. It may be insufficient.

The pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 5 may include a plasticizer.
Thereby, the softness | flexibility and elasticity of the adhesive layer 5 can be made more excellent. Further, in the pressure-sensitive adhesive layer 5 formed using the re-peelable pressure-sensitive adhesive composition, the re-peelability can be further improved, and the pressure-sensitive adhesive layer 5 is peeled off from the sheet material 31 as the adherend. It is possible to further improve the hand turning feeling when turning the lid 4 to expose the opening 22.

  Examples of plasticizers include phthalate plasticizers such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, di-n-octyl phthalate, and dicyclohexyl phthalate, trioctyl trimellitic acid, and trimellitic acid. Trimellitonate plasticizers such as triisononyl acid, triisodecyl trimellitic acid, 2-ethylhexyl trimellitic acid, polyester plasticizers such as phthalic acid polyester, phosphorus such as tricresyl phosphate, trioctyl phosphate, triphenyl phosphate Examples include acid ester plasticizers, epoxidized linseed oil, and epoxy plasticizers such as epoxidized butyl stearate, and those having an alkylene group having 4 or more carbon atoms in the molecule are preferred.

  Thereby, the lipophilicity as the whole adhesive composition (adhesive layer 5) becomes more excellent. As a result, coupled with the effect of including the oil absorbing material, the absorbed oil component can be more suitably held inside, and the holding effect of the adhesive strength when contacting the oil component should be more excellent Can do. In addition, the affinity between the plasticizer and the oil absorbent (especially the oil absorbent that is a polymer compound having a plurality of alicyclic structures), and the plasticizer and the adhesive (especially the preferred chemical structure as described above). In the pressure-sensitive adhesive composition, and can more effectively prevent unintentional variations in the composition in the pressure-sensitive adhesive layer 5. More stable oil absorption function is demonstrated at the site.

  Moreover, as a plasticizer, it is preferable to use what does not have an aromatic ring structure in a molecule | numerator.

  Thereby, the lipophilicity as the whole adhesive composition (especially re-peelable adhesive composition) becomes more excellent. As a result, coupled with the effect of including the oil absorbing material, the absorbed oil can be more suitably held inside, and the holding effect of the adhesive strength when in contact with the oil can be further improved. . In addition, the affinity between the plasticizer and the oil absorbent (especially the oil absorbent that is a polymer compound having a plurality of alicyclic structures), and the plasticizer and the adhesive (especially the preferred chemical structure as described above). The adhesive with the adhesive layer) can be made more excellent, and in the re-peelable pressure-sensitive adhesive composition, it is possible to more effectively prevent unintentional compositional variations in the pressure-sensitive adhesive layer 5. And a more stable oil absorption function is exhibited at each part.

  When the plasticizer is an ester compound of a polyvalent carboxylic acid component and an alcohol component, the alcohol component preferably has an alkyl group having 8 or more carbon atoms.

  Thereby, the lipophilicity as the whole adhesive composition (adhesive layer 5) becomes more excellent. As a result, coupled with the effect of including the oil absorbing material, the absorbed oil component can be more suitably held inside, and the holding effect of the adhesive strength when contacting the oil component should be more excellent Can do. In addition, the affinity between the plasticizer and the oil absorbent (especially the oil absorbent that is a polymer compound having a plurality of alicyclic structures), and the plasticizer and the adhesive (especially the preferred chemical structure as described above). In the pressure-sensitive adhesive composition, and can more effectively prevent unintentional variations in the composition in the pressure-sensitive adhesive layer 5. More stable oil absorption function is demonstrated at the site.

  Examples of the plasticizer that satisfies the above conditions include those having a chemical structure represented by the following formula (2) and the following formula (5).

（ただし、式（２）中、ｍは４以上の整数、ｌは８以上の整数を示す。）

(In the formula (2), m represents an integer of 4 or more, and l represents an integer of 8 or more.)

（ただし、式（５）中、ｌは８以上の整数を示す。）

(In the formula (5), l represents an integer of 8 or more.)

  By using such a plasticizer, the lipophilicity of the pressure-sensitive adhesive composition (pressure-sensitive adhesive layer 5) as a whole is further improved. As a result, coupled with the effect of including the oil absorbing material, the absorbed oil component can be more suitably retained inside, and the adhesive force retention effect when in contact with the oil component is further improved. Can do. In addition, the affinity between the plasticizer and the oil absorbent (especially the oil absorbent that is a polymer compound having a plurality of alicyclic structures), and the plasticizer and the adhesive (especially the preferred chemical structure as described above). In the pressure-sensitive adhesive composition, and can more effectively prevent unintentional variations in composition in the pressure-sensitive adhesive layer 5. A more stable oil absorption function is exhibited at the site.

  Such an effect is that at least one of the plasticizer having the chemical structure represented by the above formula (2) and the plasticizer having the chemical structure represented by the above formula (5) has the plurality of alicyclic structures described above. This is more remarkable when used in combination with an oil absorbent that is a polymer compound and a pressure-sensitive adhesive containing a monomer having an aliphatic hydrocarbon group having 5 or more carbon atoms as a constituent component.

  The content of the plasticizer in the pressure-sensitive adhesive layer 5 (in the pressure-sensitive adhesive composition) is not particularly limited, but is preferably 1 part by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the pressure-sensitive adhesive. More preferably, it is 25 parts by mass or less.

  If the content of the plasticizer is too low, the effect of including the plasticizer as described above may not be sufficiently exhibited depending on the type of the plasticizer. Moreover, when the content rate of a plasticizer is too high, there exists a possibility that the softness | flexibility of the adhesive layer 5 may become excessive.

  The pressure-sensitive adhesive layer 5 (pressure-sensitive adhesive composition) may contain components (additives and the like) other than those described above. Examples of such components include various resins, curing catalysts, solvents, softeners, dyes, pigments and other colorants, anilide-based and phenol-based antioxidants, benzophenone-based, benzotriazole-based UV absorbers, and the like. , Light stabilizers, dispersants, leveling agents, antistatic agents and the like. The content of these components is not particularly limited, but it is preferable not to exceed 10% by mass as a whole of these components excluding the solvent.

  The thickness of the pressure-sensitive adhesive layer 5 is not particularly limited, but is preferably 1 μm or more and 100 μm or less, more preferably 3 μm or more and 50 μm or less, and further preferably 5 μm or more and 30 μm or less. Thereby, the adhesive force in the adhesive layer 5 can be obtained without excess and deficiency.

  Next, a method for forming the pressure-sensitive adhesive layer 5 will be described. The method for forming the pressure-sensitive adhesive layer 5 is not particularly limited, but the pressure-sensitive adhesive composition described above (particularly, the releasable pressure-sensitive adhesive) is provided on one side (the lower surface in FIG. 2) of the lid 4 (sheet piece) prepared in advance. It can be suitably formed by applying (coating) a composition.

  Application of the pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer 5 is performed by, for example, applying a liquid pressure-sensitive adhesive composition (coating liquid) to the surface of the lid 4 with a comma coater, gravure coater, knife coater, bar coater, or the like. It is performed by applying to. Then, the adhesive layer 5 can be formed by solidifying the coating film by the coating liquid.

  The pressure-sensitive adhesive layer 5 may have a composition different from the pressure-sensitive adhesive composition as the coating liquid. For example, after applying the pressure-sensitive adhesive composition, the contained solvent may be removed, or the degree of polymerization and the degree of crosslinking are increased by advancing a curing reaction and a crosslinking reaction on the applied coating film. May be.

  In forming the pressure-sensitive adhesive layer 5, the pressure-sensitive adhesive composition and other components may be mixed to adjust the coating solution. For example, when forming the pressure-sensitive adhesive layer 5, the pressure-sensitive adhesive composition and a solvent may be mixed.

  Examples of the solvent to be used include ester solvents such as ethyl acetate and butyl acetate, ketone solvents such as methyl isobutyl ketone, methyl ethyl ketone and cyclohexanone, and aromatic hydrocarbon solvents such as toluene and xylene. These can be used alone or in combination of two or more.

  The coating solution may be any coating solution, and the solid content concentration in the coating solution is not particularly limited, but is preferably 0.5% by mass or more and 10% by mass or less, and preferably 1% by mass or more and 5% by mass or less. More preferably.

  The pressure-sensitive adhesive layer 5 is once formed on a release material (release liner) (for example, formed by the above-described coating), and then the pressure-sensitive adhesive layer is bonded to the lower surface of the lid 4 to remove the release material. It may be formed by a method (transfer method).

  In addition, as described above, the adhesive layer 5 is not formed on the lid 4 (sheet piece) whose shape is completed, but the mother (for forming the lid 4) before the lid 4 is formed by punching or the like. A pressure-sensitive adhesive layer is formed on one side of the material sheet by the same method (coating method, transfer method, etc.) as described above, and then the lid 4 is punched out into a desired shape from the base material sheet. 4, that is, the pressure-sensitive adhesive body 6 can be manufactured.

<Other configuration examples of the packaging body>
In the packaging body 1 (packaging material 2) described above, the packaging material body 3 is entirely composed of the flexible sheet material 31, but the present invention is not limited to this. For example, the packaging material main body is formed of a box-shaped object (housing), and a part (for example, the upper part) of the opening (same as the opening 22) (whether opened or not) is formed. Also good.

<Other structural examples of the lid>
FIG. 4 shows a second configuration example of the lid body in plan view. Hereinafter, the lid 4 shown in the figure will be described, but the description of the same matters as those of the lid 4 described above will be omitted, and differences will be mainly described.

  The lid 4 shown in FIG. 4 has slits 43 formed on both sides of the base end 41. As described above, when the first opening 22 is formed (opened) and when the opening 22 is exposed for the second and subsequent times, the lid 4 is lifted from the tab 42 side and the adhesive layer 5 formed on the lower surface thereof is removed. Although it peels from the outer peripheral part 24 of the sheet material 31 of the packaging material main body 3, the adhesive layer 5 in the base end part 41 of the cover body 4 was stuck without peeling from the sheet material 31 in these cases. Maintain state. The pair of slits 43 provided on both sides of the base end portion 41 has a function of preventing the base end portion 41 from being peeled (detached) from the sheet material 31. That is, when the lid 4 is opened, the lid 4 and the pressure-sensitive adhesive layer 5 formed on the lower surface thereof are gradually peeled from the distal end side toward the proximal end side, but almost the entire opening 22 is formed or exposed. After that, the peeling is stopped at the part of the pair of slits 43 (particularly at the base end of the slit 43). In this sense, the slit 43 can be said to be a peeling stop means (peeling stop portion).

  By applying the lid 4 having such a peeling stop means to the above-described packaging body 1 (packaging material 2), the opening 22 is formed (opened) and exposed, that is, the first and second and subsequent sheets 11 of the sheet 11 are formed. It is possible to more reliably prevent the entire lid body 4 from being peeled (detached) from the packaging material main body 3 during removal, and the lid body 4 can be opened and closed more easily and reliably. .

<Other structural examples of the pressure-sensitive adhesive layer>
FIG. 5 shows a second configuration example of the pressure-sensitive adhesive layer. Hereinafter, although the adhesive layer 5 shown to the same figure is demonstrated, the description is abbreviate | omitted about the matter similar to the adhesive layer 5 mentioned above, and it demonstrates centering around difference.

  The pressure-sensitive adhesive layer 5 shown in FIG. 5 has a first region 51 and a second region 52. The second region 52 is formed in a portion corresponding to the base end portion 41 of the lid body 4 (a portion immediately below the base end portion 41), and the first region 51 includes the base end portion 41 and the tab 42 of the lid body 4. It is formed in the part except. In a state where the pressure-sensitive adhesive layer 5 is bonded to the upper surface of the packaging body 3, the first region 51 includes the opening 22 (the easily breakable portion 21 and the broken piece 23) and the outer peripheral portion 24 on the outer periphery of the opening 22. Covering.

  The first region 51 of the pressure-sensitive adhesive layer 5 is a portion where the pasting and peeling are repeated a plurality of times on the packaging material body 3. For this reason, it is preferable that the 1st area | region 51 is the same as that of the structure, composition, etc. of the adhesive layer 5 mentioned above. That is, the first region 51 is preferably a re-peelable pressure-sensitive adhesive layer, and is preferably composed of a re-peelable pressure-sensitive adhesive composition. And the adhesive composition (especially re-peelable adhesive composition) which comprises the 1st area | region 51 of the adhesive layer 5 is the same as the above, an adhesive, and the oil absorber which can absorb an oil component, including.

  The second region 52 of the pressure-sensitive adhesive layer 5 may not be configured with the re-peelable pressure-sensitive adhesive composition. That is, the second region 52 is composed of a normal pressure-sensitive adhesive composition that does not assume re-peeling, a pressure-sensitive adhesive composition that exhibits strong adhesion, and the like. The pressure-sensitive adhesive composition constituting the second region 52 contains a pressure-sensitive adhesive, but does not necessarily contain the oil absorbent described above. This is because the second region 52 is not peeled once it is attached to the packaging material body 3, and therefore has no opportunity to contact the oil component. Moreover, the 2nd area | region 52 may be comprised with the adhesive agent (for example, epoxy-type adhesive agent).

  Thus, the adhesive strength [SA2] of the second region 52 to the adherend (the sheet material 31 of the packaging body 3) is the adhesion strength of the first region 51 to the adherend (the sheet material 31 of the packaging body 3). It is greater than the strength [SA1]. That is, SA1 / SA2 <1 [unit: N], preferably SA1 / SA2 ≦ 0.8, and more preferably 0.05 ≦ SA1 / SA2 ≦ 0.67.

  As described above, when the first opening 22 is formed (opened) and when the opening 22 is exposed for the second and subsequent times, the lid 4 is lifted from the tab 42 side and the adhesive layer 5 formed on the lower surface thereof is removed. Although peeling from the outer peripheral portion 24 of the sheet material 31 of the packaging material body 3, the second region 52 of the adhesive layer 5 in the base end portion 41 of the lid 4 does not peel from the sheet material 31 in these cases. Maintain the state of sticking to. At this time, since the adhesive strength (peeling strength) of the second region 52 to the sheet material 31 is larger than that of the first region 51, the function of preventing the base end portion 41 from peeling (separating) from the sheet material 31. To demonstrate. That is, when the lid 4 is opened, the lid 4 and the pressure-sensitive adhesive layer 5 formed on the lower surface thereof are gradually peeled from the distal end side (first region 51 side) toward the proximal end side. After almost forming or exposing all, the peeling is stopped by the strong adhesion (strong adhesive strength) to the sheet material 31 in the second region 52. In this sense, the second region 52 can be said to be a peeling stop means (peeling stop portion).

  By applying the pressure-sensitive adhesive layer 5 having the first region 51 and the second region 52 to the packaging body 1 (packaging material 2) described above, the opening 22 is formed (opened) and exposed, that is, the first time. Further, when the sheet 11 is taken out for the second and subsequent times, it is possible to more reliably prevent the entire lid body 4 from being peeled (detached) from the packaging material body 3, and the lid 4 can be opened and closed more securely. It can be done easily and reliably.

Second Embodiment
6 is a perspective view showing a second embodiment of the packaging body (packaging material) of the present invention, FIG. 7 is a sectional side view in a state where the lid body of the packaging body shown in FIG. 6 is closed (when not in use), FIG. 8 is a cross-sectional side view of the packaging body shown in FIG. Hereinafter, based on these drawings, the packaging material and the packaging body according to the second embodiment of the present invention will be described, but the description of the same matters as those of the first embodiment described above will be omitted, and the differences will be mainly described. explain. In the following description, the upper side in FIGS. 7 and 8 is referred to as “upper”, the lower side is referred to as “lower”, the left side in FIGS. 6 to 8 is referred to as “base end part”, and the right side is referred to as “tip part”. say.

  As shown in FIGS. 6-8, the package 1 of 2nd Embodiment is stored in the packaging material 2 and the space S formed in the packaging material 2 similarly to 1st Embodiment. 10.

  The packaging material 2 is composed of a packaging material body 3 and a lid 4, and an opening 22 is formed in advance in the upper portion of the packaging material body 3 in an unused state.

  Moreover, the adhesive layer 5 is formed in the packaging body main body 3 side contrary to 1st Embodiment. More specifically, it is formed (joined) by, for example, coating on a region surrounding the opening 22 of the sheet material 31 of the packaging material body 3, that is, the upper surface of the outer peripheral portion 24.

  The shape of the pressure-sensitive adhesive layer 5 in a plan view is an annular shape in which a hole is formed in a portion corresponding to the opening 22, and does not protrude from the outline of the lid 4.

  The pressure-sensitive adhesive layer 5 may be directly formed (joined) on the upper surface of the outer peripheral portion 24 of the sheet material 31, but at least one intermediate layer (not shown) is provided between the pressure-sensitive adhesive layer 5 and the sheet material 31. ) May be present. Examples of the intermediate layer include one for increasing the bonding strength of the pressure-sensitive adhesive layer 5 to the sheet material 31 (for example, an adhesive layer and a strong pressure-sensitive adhesive layer).

  Further, the bonding surface of the pressure-sensitive adhesive layer 5, that is, the surface of the sheet material 31 (the upper surface of the outer peripheral portion 24) may be subjected to a surface treatment for increasing the bonding strength with the pressure-sensitive adhesive layer 5. Examples of such a surface treatment include the same surface treatment as described in the first embodiment, and a detailed description thereof will be omitted.

  Regardless of the presence or absence of such an intermediate layer or surface treatment, the bonding strength of the pressure-sensitive adhesive layer 5 to the outer peripheral portion 24 is larger than the bonding strength to the lid body 4 (preferably 1.2 times to 50 times). ). Thus, when the lid 4 is lifted upward from the tab 42 side and the opening 22 is exposed, the pressure-sensitive adhesive layer 5 is kept bonded to the packaging body 3 side while the lid 4 It peels from the lower surface. In particular, adhesive residue on the lid 4 side, that is, a residue on the surface of the lid 4 of the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 5 is also prevented.

  In the package 1 (packaging material 2) of the present embodiment, the configuration, composition, characteristics, and the like of the pressure-sensitive adhesive layer 5 are the same as those described in the first embodiment. Moreover, it is the same as that of the said 1st Embodiment that peeling / sticking operation of multiple times is performed, and the effect exhibited in that case is also the same.

  In the package 1 of the second embodiment, since it is not necessary to break the easily breakable portion 21 to form the opening 22 at the first opening from the unused state, the first opening is performed in the same manner as the second and subsequent times. There is an advantage that it can be performed with a small force.

  In addition, the lid body 4 having the configuration shown in FIG. 4 described above can also be applied to the packaging body 1 (packaging material 2) of the second embodiment, and thereby the above-described effects can be exhibited.

  In addition, the pressure-sensitive adhesive layer 5 having the configuration shown in FIG. 5 described above can also be applied to the package 1 (packaging material 2) of the second embodiment, and thereby the above-described effects can be exhibited.

  As mentioned above, although this invention was demonstrated based on each embodiment, this invention is not limited to these, For example, what combined each structure in each embodiment arbitrarily is also contained in this invention.

DESCRIPTION OF SYMBOLS 1 Package 2 Packaging material 21 Easily breakable part 22 Opening 23 Broken piece 24 Outer peripheral part 3 Packaging material main body 31 Sheet material 32 Sealing part 4 Lid 41 Base end part 42 Tab 43 Slit 5 Adhesive layer 51 1st area | region 52 1st 2 areas 6 Adhesives 10 Items 11 Sheets (wet sheets)
S space

Claims (12)

A packaging material main body having a space for storing the stored items therein, a lid that closes an opening for taking out the stored items from the packaging material main body, and an adhesive layer that joins the packaging material main body and the lid. A packaging material having
All or a part of the pressure-sensitive adhesive layer has a pressure-sensitive adhesive and an oil absorbent that can absorb an oil component. The packaging material body has an easily breakable portion, and the opening is formed by breaking the easily breakable portion,
The packaging material according to claim 1, wherein the pressure-sensitive adhesive layer is formed on the lid side. The opening is formed in the packaging material body,
The packaging material according to claim 1, wherein the adhesive layer is formed in a region surrounding the opening of the packaging material body.   The said adhesive layer is a packaging material of any one of Claim 1 thru | or 3 comprised by the adhesive composition containing an adhesive and the oil absorber which can absorb an oil component.   The packaging material according to any one of claims 1 to 4, wherein the stored item includes an oil component.   The packaging material according to any one of claims 1 to 5, wherein the oil absorbent is a polymer compound having a plurality of alicyclic structures in a repeating unit. The packaging material according to claim 6, wherein the oil absorbing material has a chemical structure represented by the following formula (1).

(In the formula (1), n represents an integer of 2 or more, and m represents an integer of 1 to 4)   The packaging material according to any one of claims 1 to 7, wherein a content of the oil absorbent in the pressure-sensitive adhesive layer is 0.1 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the pressure-sensitive adhesive. .   The packaging material according to any one of claims 1 to 8, wherein the pressure-sensitive adhesive contains a monomer having an aliphatic hydrocarbon group having 5 or more carbon atoms as a constituent component.   The packaging material according to any one of claims 1 to 9, wherein the pressure-sensitive adhesive layer further includes a plasticizer having an alkylene group having 4 or more carbon atoms in the molecule.   The said adhesive layer has a 1st area | region and the 2nd area | region where the adhesive strength with respect to a to-be-adhered body is large compared with the said 1st area | region. Packaging material.   A package comprising the packaging material according to any one of claims 1 to 11 and a stored item stored in the space of the packaging material.

Images