JPH0354064Y2 - - Google Patents
Info
- Publication number
- JPH0354064Y2 JPH0354064Y2 JP8879787U JP8879787U JPH0354064Y2 JP H0354064 Y2 JPH0354064 Y2 JP H0354064Y2 JP 8879787 U JP8879787 U JP 8879787U JP 8879787 U JP8879787 U JP 8879787U JP H0354064 Y2 JPH0354064 Y2 JP H0354064Y2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- resin
- polyethylene
- resealing
- sealing material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000004698 Polyethylene Substances 0.000 claims description 13
- -1 polyethylene Polymers 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 11
- 239000003566 sealing material Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 48
- 230000000694 effects Effects 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000011086 glassine Substances 0.000 description 2
- 235000021539 instant coffee Nutrition 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 210000000481 breast Anatomy 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Closures For Containers (AREA)
Description
＜産業上の利用分野＞
本発明は、インスタントコーヒー等を収納した
瓶口に使用されるインナーシール材に関する。
＜従来の技術＞
従来、インスタントコーヒー等の容器の瓶口に
は、内容物を湿気から保護する目的で、インナー
シール材が用いられている。このインナーシール
材は、再封層、剥離層、メンブレン層からなる積
層体で、キヤツプをはずしたときに再封層とメン
ブレン層が剥離層により剥離して分離するもので
あり、この再封層とメンブレン層との剥離性を改
善するため各種工夫がなされている。
例えば実公昭56−9659号に示されるように、剥
離層に、ポリエチレンに対して親和性の弱い合成
樹脂を用いたものや、特公昭57−48466号に示さ
れる、剥離層としてドツト状のワツクスを設けた
もの、あるいは特公昭56−35544号に示される、
剥離層に界面活性剤を用いたもの等が知られてい
る。
＜考案が解決しようとする問題点＞
上述の従来技術のうち、剥離層に、ポリエチレ
ンに対して親和性の弱い樹脂を用いたものは、使
用される樹脂により、ポリエチレンとの剥離性を
調節するために、シリコーン樹脂あるいは界面活
性剤等を前記樹脂に添加した組成物を用いてい
る。しかしながら、これらの添加剤は確かに剥離
強度を調節する作用は有するが、剥離界面のすべ
り性は改善されない。すなわち、インナーシール
材は、開封時にキヤツプを回すことにより再封層
とメンブレン層が剥離して分離され、この際両層
間には適度な剥離強度とすべり性が要求される
が、従来のインナーシール材はこのすべり性が悪
く、問題であつた。
さらに、前記剥離層には耐熱性の良い樹脂、例
えばアクリル系、塩化ビニル系、あるいはこれら
の混合物を用いることが好ましいが、これらの樹
脂は耐熱性が良好であるがため、ポリエチレンと
の親和性が極めて弱く、そのままでは実際には使
用できなかつた。
＜問題点を解決するための手段＞
本考案は上記問題点を解決するためになされた
ものであつて、再封層、剥離層、メンブレン層か
らなるインナーシール材において、前記剥離層
が、ポリエチレンに対して親和性の弱い樹脂に、
シリカ粉末を0.05〜3.0％添加してなる組成物か
らなることを特徴とするインナーシール材であ
る。
＜作用＞
本考案は、剥離層にポリエチレンに対して親和
性の弱い樹脂に、シリカ粉末を0.05〜3.0％添加
した組成物を使用することにより、剥離層と再封
層間の接触面積が実質的に増加して剥離強度が高
められると共に、シリカ粉末が有するすべり性に
より、剥離層と再封層の界面のすべり性が良くな
る。
＜実施例＞
本考案の実施例について図面に従つて説明す
る。
本考案のインナーシール材は、第１図に示すよ
うに、板紙１、接着剤層２、ポリエチレン層３か
らなる再封層Ａ、剥離層Ｂ、および印刷４を施し
たアルミニウム箔５、ポリエチレン層６、グラシ
ン紙７からなるメンブレン層Ｃを順次積層してな
るインナーシール材である。
ここで剥離層Ｂは、ポリエチレンに対して親和
性の弱い樹脂、例えばニトロセルロース系、ポリ
アミド系、アクリル系、ゴム系、ポリエステル
系、ポリウレタン系、ポリ塩化ビニル系等の樹脂
に、シリカ粉末を0.05〜3.0％、好ましくは0.1〜
0.5％添加した組成物を用いる。シリカ粉末の添
加量は使用する樹脂により適宜設定するが、おお
むね3.0％以上にすると剥離強度が強くなりすぎ
て好ましくない。また0.05％よりも少ないと、目
的とする効果が得られない。使用する樹脂がアク
リル系、塩化ビニル系、あるいはこれらの混合物
である場合、本考案の効果が特に著しい。
＜試験例＞
グラシン紙とアルミニウム箔を、ポリエチレン
を介して積層したメンブレン層上に、アクリル／
塩化ビニル混合樹脂に0.3％（重量比）のシリカ
粉末を添加した組成物をコーテイングして剥離層
を設けた。さらに剥離層上に、ポリエチレン層を
設け、接着剤層を介して乳栓ボール紙を設け再封
層を形成した後、所定の形状に打抜いて本考案に
よるインナーシール材を作成した。比較例とし
て、前記構成の剥離層にシリカ粉末を添加しない
もの（比較例１）、剥離層にニトロセルロース系
樹脂を用いたもの（比較例２）をそれぞれ作成し
た。
以上３種のインナーシール材について、剥離強
度、開封性、インナーシール材作成時の作業性の
点について評価した。
<Industrial Application Field> The present invention relates to an inner sealing material used for the mouth of a bottle containing instant coffee or the like. <Prior Art> Conventionally, an inner sealing material has been used at the mouth of a container for instant coffee or the like for the purpose of protecting the contents from moisture. This inner seal material is a laminate consisting of a resealing layer, a peeling layer, and a membrane layer.When the cap is removed, the resealing layer and membrane layer are separated by the peeling layer, and this resealing layer Various efforts have been made to improve the releasability between the membrane layer and the membrane layer. For example, as shown in Japanese Utility Model Publication No. 56-9659, a synthetic resin with a weak affinity for polyethylene is used for the release layer, and as shown in Japanese Patent Publication No. 57-48466, a dot-shaped release layer is used. or as shown in Special Publication No. 56-35544,
A release layer using a surfactant is known. <Problems to be solved by the invention> Among the above-mentioned conventional technologies, those that use a resin that has a weak affinity for polyethylene in the release layer adjust the release property from polyethylene depending on the resin used. For this reason, a composition in which a silicone resin or a surfactant or the like is added to the resin is used. However, although these additives certainly have the effect of adjusting the peel strength, they do not improve the slipperiness of the peel interface. In other words, when the inner seal material is opened, the reseal layer and membrane layer are peeled off and separated by turning the cap. At this time, appropriate peel strength and slipperiness are required between the two layers, but conventional inner seals The material had poor slipperiness, which was a problem. Further, it is preferable to use a resin with good heat resistance, such as an acrylic resin, a vinyl chloride resin, or a mixture thereof, for the release layer, but since these resins have good heat resistance, they have a high affinity with polyethylene. was extremely weak and could not be used as it was. <Means for Solving the Problems> The present invention has been made to solve the above problems, and includes an inner sealing material comprising a resealing layer, a peeling layer, and a membrane layer, in which the peeling layer is made of polyethylene. For resins that have a weak affinity for
This inner sealing material is characterized by being made of a composition containing 0.05 to 3.0% of silica powder. <Function> The present invention uses a composition in which 0.05 to 3.0% of silica powder is added to a resin with weak affinity for polyethylene for the release layer, thereby substantially reducing the contact area between the release layer and the resealing layer. This increases the peel strength, and the slip properties of the silica powder improve the slip properties at the interface between the release layer and the resealing layer. <Example> An example of the present invention will be described according to the drawings. As shown in FIG. 1, the inner sealing material of the present invention comprises a resealing layer A consisting of a paperboard 1, an adhesive layer 2, a polyethylene layer 3, a peeling layer B, an aluminum foil 5 with printing 4, and a polyethylene layer. 6. This is an inner sealing material made by sequentially laminating membrane layers C made of glassine paper 7. Here, the release layer B is made of a resin that has a weak affinity for polyethylene, such as a nitrocellulose-based, polyamide-based, acrylic-based, rubber-based, polyester-based, polyurethane-based, or polyvinyl chloride-based resin, and 0.05% of silica powder is added to the resin. ~3.0%, preferably 0.1~
A composition containing 0.5% is used. The amount of silica powder added is appropriately set depending on the resin used, but if it is approximately 3.0% or more, the peel strength becomes too strong, which is not preferable. Moreover, if it is less than 0.05%, the desired effect cannot be obtained. The effects of the present invention are particularly significant when the resin used is acrylic, vinyl chloride, or a mixture thereof. <Test example> Acrylic/
A release layer was provided by coating a composition in which 0.3% (weight ratio) of silica powder was added to a vinyl chloride mixed resin. Furthermore, a polyethylene layer was provided on the release layer, a breast plug cardboard was provided via an adhesive layer, a resealing layer was formed, and the inner sealing material according to the present invention was punched out into a predetermined shape. As comparative examples, a release layer having the above structure in which silica powder was not added (Comparative Example 1) and a release layer using a nitrocellulose resin (Comparative Example 2) were prepared. The above three types of inner seal materials were evaluated in terms of peel strength, unsealability, and workability during production of the inner seal materials.
【表】
＜考案の効果＞
本考案によるインナーシール材は以上述べた構
成からなつているので、開封に際してすべりが良
く開封性が良く、また再封層とメンブレン層間の
剥離強度も適当なものとなり、インナーシール作
成時、特に打抜時に再封層とメンブレン層が剥離
してしまうことがない、優れたインナーシール材
である。[Table] <Effects of the invention> Since the inner sealing material according to the invention has the above-mentioned structure, it has good slippage and ease of opening when opened, and also has appropriate peel strength between the resealing layer and the membrane layer. This is an excellent inner seal material that does not cause the resealing layer and membrane layer to separate when making the inner seal, especially during punching.
第１図は本考案の一実施例を示す断面図であ
る。
１……板紙、２……接着剤層、３……ポリエチ
レン層、４……印刷層、５……アルミニウム箔、
６……ポリエチレン層、７……グラシン紙、Ａ…
…再封層、Ｂ……剥離層、Ｃ……メンブレン層。
FIG. 1 is a sectional view showing an embodiment of the present invention. 1... Paperboard, 2... Adhesive layer, 3... Polyethylene layer, 4... Printing layer, 5... Aluminum foil,
6... Polyethylene layer, 7... Glassine paper, A...
...Resealing layer, B...Peeling layer, C...Membrane layer.
Claims (1)
ナーシール材において、前記剥離層が、ポリエ
チレンに対して親和性の弱い樹脂に、シリカ粉
末を0.05〜3.0％添加してなる組成物からなる
ことを特徴とするインナーシール材。 (2) 前記剥離層の樹脂が、アクリル系樹脂、塩化
ビニル系樹脂、あるいはこれらの混合物である
ことを特徴とする、実用新案登録請求の範囲第
１項に記載のインナーシール材。[Claims for Utility Model Registration] (1) In an inner sealing material consisting of a resealing layer, a peeling layer, and a membrane layer, the peeling layer contains 0.05 to 3.0% silica powder in a resin that has a weak affinity for polyethylene. An inner sealing material characterized by being made of a composition in which additives are added. (2) The inner seal material according to claim 1, wherein the resin of the release layer is an acrylic resin, a vinyl chloride resin, or a mixture thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8879787U JPH0354064Y2 (en) | 1987-06-09 | 1987-06-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8879787U JPH0354064Y2 (en) | 1987-06-09 | 1987-06-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63197864U JPS63197864U (en) | 1988-12-20 |
| JPH0354064Y2 true JPH0354064Y2 (en) | 1991-11-27 |
Family
ID=30947216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8879787U Expired JPH0354064Y2 (en) | 1987-06-09 | 1987-06-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0354064Y2 (en) |
-
1987
- 1987-06-09 JP JP8879787U patent/JPH0354064Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63197864U (en) | 1988-12-20 |
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