JP2019035009A - Double-sided adhesive tape or double-sided adhesive sheet - Google Patents

Double-sided adhesive tape or double-sided adhesive sheet Download PDF

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JP2019035009A
JP2019035009A JP2017156243A JP2017156243A JP2019035009A JP 2019035009 A JP2019035009 A JP 2019035009A JP 2017156243 A JP2017156243 A JP 2017156243A JP 2017156243 A JP2017156243 A JP 2017156243A JP 2019035009 A JP2019035009 A JP 2019035009A
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double
sensitive adhesive
pressure
adhesive layer
adherend
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JP7232972B2 (en
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宏之 笠原
Hiroyuki Kasahara
宏之 笠原
河井　重博
Shigehiro Kawai
重博 河井
山本　尚
Takashi Yamamoto
尚 山本
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Kokuyo Co Ltd
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Abstract

To provide a double-sided adhesive tape or double-sided adhesive sheet capable of preferably concealing the information by adhering to an adherent on which information is expressed and having excellent economical efficiency.SOLUTION: A double-sided adhesive tape 1 or sheet capable of concealing the relevant information by adhering to an adherent on which any information is expressed, in which the double-sided adhesive tape 1 or sheet including: an adhesive agent layer 12 that adheres to the adherent; and a base material 11 in which the adhesive layer 12 is provided on both surfaces, both surfaces adhere to each of the adherents mutually overlapping via the adhesive layer 12, and when an outer force peeling these adherents is applied, an interlaminar fracture or delamination is caused to divide into two, and an opaque state where the information cannot be seen through as each part of the respective parts adheres to the adherents is maintained is constituted.SELECTED DRAWING: Figure 1

Description

本発明は、何らかの情報が表された被着体に貼付することで当該情報を隠蔽することのできる両面粘着テープまたは両面粘着シートに関する。   The present invention relates to a double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet that can be concealed by sticking to an adherend on which some information is represented.

葉書や封書の封筒、伝票、納品書や請求書、決済の明細書、また医薬の処方箋その他の書面には、みだりに漏洩ないし拡散されるべきでない個人情報が記載または印字されている。従って、これらを廃棄する際には、記載または印字された個人情報を適切に隠蔽することが求められる。   Personal information that should not be leaked or diffused is written or printed on postcards or envelopes of slips, slips, invoices or invoices, payment details, medical prescriptions or other documents. Therefore, when discarding these, it is required to appropriately conceal the written or printed personal information.

葉書、封筒または書面等の上に表示されている情報を隠蔽するために使用される道具として、その情報の上に重ねてランダムな文字や図形等を押印するスタンプ（例えば、下記非特許文献１を参照）が公知である。だが、この種のスタンプは、その着色剤（顔料や染料）の塗りむら等によって隠蔽すべき情報が十分に隠蔽されなかったり、経時変化で着色剤が色褪せたり、他の物と接触したときに着色剤が擦れて薄くなったりするといった問題を孕む。加えて、着色剤が使用者の手指等を汚してしまうこともある。   As a tool used for concealing information displayed on a postcard, envelope, or document, a stamp (for example, Non-Patent Document 1 below) is used to stamp random characters or figures on the information. Are known). However, when this type of stamp is used, the information to be concealed is not sufficiently concealed due to uneven coating of the colorant (pigments and dyes), the colorant fades over time, or comes into contact with other objects. The problem is that the colorant rubs and becomes thin. In addition, the colorant may contaminate the user's fingers and the like.

情報の上に重ねて不透明な粘着テープまたはシートを貼付する（例えば、下記特許文献１及び２を参照）ことも考えられる。この場合、上に述べたようなスタンプにまつわる問題は起こりにくいが、情報が表示されている領域の全体を覆うように粘着テープまたはシールを貼る必要があり、相応の材料コストが発生して必ずしも経済的ではない。   It is also conceivable to paste an opaque adhesive tape or sheet on the information (see, for example, Patent Documents 1 and 2 below). In this case, the problem with the stamp as described above is unlikely to occur, but it is necessary to apply an adhesive tape or seal so as to cover the entire area where the information is displayed. Not right.

特許第５５００５７０号公報Japanese Patent No. 5500570 特開２０１６−２００６４４号公報Japanese Patent Laid-Open No. 2016-200634

“個人情報保護スタンプ「ケシポン（登録商標）」シリーズ”、［ｏｎｌｉｎｅ］、プラス株式会社、［平成２９年７月２５日検索］、インターネット＜ＵＲＬ：https://bungu.plus.co.jp/product/security/keshipon/index.html＞“Personal Information Protection Stamp“ Keshpon (registered trademark) ”Series”, [online], Plus Co., Ltd. [searched July 25, 2017], Internet <URL: https://bungu.plus.co.jp/ product / security / keshipon / index.html>

本発明は、情報が表された被着体に貼付することで当該情報を好適に隠蔽でき、経済性にも優れた両面粘着テープまたは両面粘着シートを提供しようとするものである。   The present invention is intended to provide a double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet that can be suitably concealed by being affixed to an adherend on which information is represented, and is excellent in economy.

本発明では、何らかの情報が表された被着体に貼付することで当該情報を隠蔽することのできる両面粘着テープまたは両面粘着シートであって、被着体に粘着する粘着剤層と、両面に前記粘着剤層が設けられその両面が粘着剤層を介して互いに重なり合う被着体の各々に接着するとともに、それら被着体を引き剥がすような外力が作用した際に層間破壊または層間剥離を起こして二分され、その各部分がそれぞれ被着体に接着したまま情報を透かし見ることのできない不透明な状態を維持する基材とを具備する両面粘着テープまたは両面粘着シートを構成した。ここで、「層間破壊」とは、両面粘着テープまたは両面粘着シートの基材が破壊して二つに分離すること（層間割れ）を言い、「層間剥離」とは、複数または多数の層が重なり合った基材のある層とこれ接合する層とが分離して基材が二つに分離することを言う。このような両面粘着テープまたは両面粘着シートであれば、スタンプのような着色剤の擦れの問題を招くことはなく、また使用者の手指等を汚さずに済む。   In the present invention, a double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet that can conceal the information by affixing it to the adherend on which some information is represented, an adhesive layer that adheres to the adherend, and both sides The pressure-sensitive adhesive layer is provided, and both surfaces of the pressure-sensitive adhesive layer are adhered to each of the adherends that overlap each other via the pressure-sensitive adhesive layer, and when an external force that peels off the adherend acts, delamination or delamination occurs. A double-sided pressure-sensitive adhesive tape or a double-sided pressure-sensitive adhesive sheet comprising a base material that maintains an opaque state in which information cannot be seen through with each part adhered to an adherend. Here, “interlaminar fracture” means that the base material of the double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet breaks and separates into two (interlaminar cracks). It means that the layer with the overlapping base material and the layer to be joined are separated, and the base material is separated into two. Such a double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet does not cause a problem of rubbing of a colorant such as a stamp and does not contaminate the user's fingers and the like.

前記基材は、例えばパルプ繊維から構成された紙を主体とする。   The base material is mainly paper made of, for example, pulp fibers.

前記基材の色は、黒色であることが好ましい。   The color of the substrate is preferably black.

また、所定方向に延伸する長尺な帯状をなしており、前記基材の一方の面に前記粘着剤層を介して接着した剥離容易な支持体を具備し、前記基材及び前記粘着剤層を前記所定方向に沿って配列された複数の断片に分断するような切れ目が基材及び粘着剤層に形成されているならば、必要な寸法の基材及び粘着剤層を、一個の断片または連続した複数個の断片の形で容易に切り出すことができる。   Further, it has a long strip shape extending in a predetermined direction, and comprises an easily peelable support bonded to one surface of the base material via the pressure-sensitive adhesive layer, and the base material and the pressure-sensitive adhesive layer If the substrate and the pressure-sensitive adhesive layer have cuts that divide the substrate into a plurality of pieces arranged along the predetermined direction, the substrate and the pressure-sensitive adhesive layer having the required dimensions are separated into one piece or It can be easily cut out in the form of a plurality of continuous pieces.

本発明によれば、情報が表された被着体に貼付することで当該情報を好適に隠蔽でき、経済性にも優れた両面粘着テープまたは両面粘着シートを実現できる。   According to the present invention, it is possible to realize a double-sided pressure-sensitive adhesive tape or a double-sided pressure-sensitive adhesive sheet that is suitably concealed by being attached to an adherend on which information is represented, and that is excellent in economy.

本発明の一実施形態の両面粘着テープを模式的に示す斜視図。The perspective view which shows typically the double-sided adhesive tape of one Embodiment of this invention. 同実施形態の両面粘着テープの使用法を説明する斜視図。The perspective view explaining the usage method of the double-sided adhesive tape of the embodiment. 同実施形態の両面粘着テープの使用法を説明する断面図。Sectional drawing explaining the usage method of the double-sided adhesive tape of the embodiment. 同実施形態の両面粘着テープの使用法を説明する斜視図。The perspective view explaining the usage method of the double-sided adhesive tape of the embodiment. 同実施形態の両面粘着テープの使用法を説明する断面図。Sectional drawing explaining the usage method of the double-sided adhesive tape of the embodiment. 同実施形態の両面粘着テープの使用法を説明する斜視図。The perspective view explaining the usage method of the double-sided adhesive tape of the embodiment. 同実施形態の両面粘着テープの使用法を説明する断面図。Sectional drawing explaining the usage method of the double-sided adhesive tape of the embodiment. 同実施形態の両面粘着テープの使用法を説明する断面図。Sectional drawing explaining the usage method of the double-sided adhesive tape of the embodiment. 各種の紙材料の内部結合強さまたは層間剥離強さの測定実験の結果を示す表。The table | surface which shows the result of the measurement experiment of the internal bond strength or delamination strength of various paper materials. 各種の紙材料の内部結合強さまたは層間剥離強さの測定実験の結果を示すグラフ。The graph which shows the result of the measurement experiment of the internal bond strength or delamination strength of various paper materials. 紙材料の内部結合強さまたは層間剥離強さの測定実験の方法を説明する断面図。Sectional drawing explaining the method of the measurement experiment of the internal bond strength or delamination strength of paper material.

本発明の一実施形態を、図面を参照して説明する。図１に示す本実施形態の両面粘着テープ１は、透けない基材１１の両面にそれぞれ粘着剤層１２を設けてなるもので、何らかの情報が表された被着体３に貼付して当該情報を隠蔽するために使用される。対象となる被着体３は、例えば氏名や住所、電話番号等の適切に隠蔽するべき個人情報が記載または印刷されている葉書、封書の封筒、伝票、納品書、請求書、決済の明細書、医薬の処方箋その他の書面である。   An embodiment of the present invention will be described with reference to the drawings. The double-sided pressure-sensitive adhesive tape 1 of this embodiment shown in FIG. 1 is formed by providing a pressure-sensitive adhesive layer 12 on both sides of a substrate 11 that is not transparent, and is pasted on an adherend 3 on which some information is represented. Used to hide. The target adherend 3 is, for example, a postcard, envelope, slip, invoice, invoice, or statement of settlement on which personal information such as name, address, telephone number, etc. is properly printed or hidden. , Medical prescriptions and other written documents.

両面粘着テープ１の基材１１は、植物その他のパルプ繊維を膠着させて製造した紙を主体とする。基材１１の内部では、パルプ繊維が当該基材１１の面に略平行かつランダムに配列され互いに重畳して紙層を構築している。基材１１は、単層構造であってもよく、複数の薄い層が積層した複層構造または多層構造をなしていてもよい。基材１１の色は、不透明な濃色であることが好ましく、例えば黒色や濃紺色、濃赤色等とすることが考えられる。但し、基材１１が単色であるとは限られず、模様や図形、文字、絵柄等がプリントされていることもあり得る。   The base material 11 of the double-sided pressure-sensitive adhesive tape 1 is mainly made of paper produced by glueing plants and other pulp fibers. Inside the base material 11, pulp fibers are arranged substantially parallel and randomly to the surface of the base material 11 and overlap each other to construct a paper layer. The base material 11 may have a single layer structure, or may have a multilayer structure or a multilayer structure in which a plurality of thin layers are stacked. The color of the substrate 11 is preferably an opaque dark color, for example, black, dark blue, dark red, or the like. However, the base material 11 is not limited to a single color, and patterns, figures, characters, patterns, and the like may be printed.

両面粘着テープ１の粘着剤層１２は、基材１１の表裏両面に粘着剤を塗工して構成する。粘着剤には、既知の様々な種類、態様のものを採用することが許される。なお、後述するように、本両面粘着テープ１を被着体３に貼付したときに粘着剤層１２が発揮する粘着力が、基材１１の内部結合強さまたは層間剥離強さを上回るように、粘着剤の成分や組成、基材１１への塗布量や塗布厚を設定することが求められる。内部結合強さまたは層間剥離強さとは、基材１１の表面（または、裏面）を裏面（表面）から引き離すような外力を作用させた場合に、当該基材１１が層間破壊または層間剥離を起こして裂開するときの力の大きさ、いわば基材１１の厚み方向の力に耐える強さを言う。   The pressure-sensitive adhesive layer 12 of the double-sided pressure-sensitive adhesive tape 1 is configured by applying a pressure-sensitive adhesive to both the front and back surfaces of the substrate 11. Adhesives of various known types and forms are allowed to be used. As will be described later, the adhesive force exerted by the pressure-sensitive adhesive layer 12 when the double-sided pressure-sensitive adhesive tape 1 is applied to the adherend 3 exceeds the internal bond strength or delamination strength of the substrate 11. It is required to set the component and composition of the pressure-sensitive adhesive, the amount of application to the substrate 11 and the application thickness. The internal bond strength or delamination strength means that when an external force is applied to separate the front surface (or back surface) of the base material 11 from the back surface (front surface), the base material 11 causes delamination or delamination. The magnitude of the force when tearing, that is, the strength to withstand the force in the thickness direction of the substrate 11.

本実施形態の両面粘着テープ１は、所定方向に延伸する長尺な帯状をなしている。しかして、テープ１の基材１１に粘着剤層１２を介して支持体１３を接着している。支持体１３は、粘着剤層１２を塗工した基材１１を支持してこれを搬送する役割と、粘着剤層１２を保護しその粘着性を維持する剥離ライナとしての役割とを担っている。支持体１３は、粘着剤層１２から容易に剥離可能な素材を用いて作製する。   The double-sided pressure-sensitive adhesive tape 1 of the present embodiment has a long belt shape extending in a predetermined direction. Thus, the support 13 is bonded to the base material 11 of the tape 1 via the pressure-sensitive adhesive layer 12. The support 13 plays a role of supporting and transporting the base material 11 coated with the pressure-sensitive adhesive layer 12 and a role as a release liner for protecting the pressure-sensitive adhesive layer 12 and maintaining its adhesiveness. . The support 13 is produced using a material that can be easily peeled off from the pressure-sensitive adhesive layer 12.

本両面粘着テープ１は、一種のテープディスペンサである転写具２とともに好適に使用することができる。転写具２は、従来より周知のもので、その具体的構造及び機能は、例えば特許第６０１５２６６号公報等に開示されている。即ち、図８に示すように、転写具２は、予め両面粘着テープ１が巻かれている繰出リールから当該テープ１を繰り出し、同テープ１を巻取リールに巻き取りつつ、テープ１を巻き掛けた転写ヘッド２１が当該テープ１を被着体３の被着面に押圧することで、基材１１及び粘着剤層１２を被着面に転写する。転写具２の繰出リールは、基材１１及び粘着剤層１２を支持体１３に支持させたテープ１を巻き回した状態で保持する。一方で、巻取リールは、転写ヘッド２１を通過した後のテープ１、即ち基材１１及び粘着剤層１２が被着体３に転写された後の支持体１３のみを巻き取る。言うまでもなく、支持体１３は、被着体３に転写されず、被着体３に接着しない。   This double-sided pressure-sensitive adhesive tape 1 can be suitably used together with a transfer tool 2 which is a kind of tape dispenser. The transfer tool 2 is conventionally known, and its specific structure and function are disclosed in, for example, Japanese Patent No. 6015266. That is, as shown in FIG. 8, the transfer tool 2 unwinds the tape 1 from the supply reel on which the double-sided adhesive tape 1 is wound in advance, and winds the tape 1 while winding the tape 1 around the take-up reel. The transfer head 21 presses the tape 1 against the adherend surface of the adherend 3 to transfer the substrate 11 and the adhesive layer 12 to the adherend surface. The feeding reel of the transfer tool 2 holds the tape 1 in which the base 11 and the pressure-sensitive adhesive layer 12 are supported by the support 13 in a wound state. On the other hand, the take-up reel takes up only the support 1 after the tape 1 after passing through the transfer head 21, that is, the base material 11 and the adhesive layer 12 are transferred to the adherend 3. Needless to say, the support 13 is not transferred to the adherend 3 and does not adhere to the adherend 3.

両面粘着テープ１における、支持体１３を除く基材１１及び粘着剤層１２には、これらを当該テープ１の延伸方向に沿って配列された複数の断片に分断するような切れ目１４を入れてある。従って、テープ１の支持体１３から基材１１及び粘着剤層１２を被着体３の被着面に転写する際に、基材１１及び粘着剤層１２を必要な寸法または分量だけ、一個の断片または連続した複数個の断片の形で、容易に切り出すことが可能となっている。   In the double-sided pressure-sensitive adhesive tape 1, the base material 11 excluding the support 13 and the pressure-sensitive adhesive layer 12 are provided with cuts 14 that divide them into a plurality of pieces arranged along the extending direction of the tape 1. . Therefore, when the base material 11 and the pressure-sensitive adhesive layer 12 are transferred from the support 13 of the tape 1 to the adherend surface of the adherend 3, the base material 11 and the pressure-sensitive adhesive layer 12 are each provided in a necessary size or amount. It can be easily cut out in the form of a piece or a plurality of continuous pieces.

本実施形態の両面粘着テープ１の使用法の一例を述べると、まず、図２及び図３に示すように、被着体３における隠蔽するべき情報が表示されている領域の約半分を覆うように、基材１１及び粘着剤層１２を転写する。これにより、基材１１の一方の面に設けられた粘着剤層１２が被着体３の被着面に粘着し、基材１１が当該被着面に接着する。   An example of how to use the double-sided pressure-sensitive adhesive tape 1 of the present embodiment will be described. First, as shown in FIGS. 2 and 3, about half of the area where information to be concealed in the adherend 3 is displayed is covered. Then, the substrate 11 and the pressure-sensitive adhesive layer 12 are transferred. Thereby, the adhesive layer 12 provided on one surface of the substrate 11 adheres to the adherend surface of the adherend 3, and the substrate 11 adheres to the adherend surface.

しかる後、図４及び図５に示すように、被着体３を二つ折りに畳むことで、当該被着体３における隠蔽するべき情報が表示されているが未だ転写テープ１の基材１１が接着していない残り半分の領域を、基材１１の他方の面に設けられた粘着剤層１２に重ねる。これにより、基材１１の他方の面に設けられた粘着剤層１２が被着体３の被着面に粘着し、基材１１が当該被着面に接着する。また、折り畳まれた被着体３が、間に両面テープ１の基材１１及び粘着剤層１２を挟んで、互いに重なり合い対向する状態となる。   Thereafter, as shown in FIGS. 4 and 5, the adherend 3 is folded in half so that the information to be concealed in the adherend 3 is displayed, but the substrate 11 of the transfer tape 1 is still present. The remaining half of the unbonded region is overlaid on the pressure-sensitive adhesive layer 12 provided on the other surface of the substrate 11. Thereby, the adhesive layer 12 provided on the other surface of the substrate 11 adheres to the adherend surface of the adherend 3, and the substrate 11 adheres to the adherend surface. In addition, the folded adherend 3 is in a state of being opposed to each other with the base material 11 and the adhesive layer 12 of the double-sided tape 1 interposed therebetween.

このように重なり合う被着体３を両面粘着テープ１から引き剥がして展開するような操作がなされると、基材１１の表裏両面に、一方の面を他方の面から離反させるような外力が作用することとなる。そして、基材１１の内部結合強さまたは層間剥離強さが、同基材１１を被着体３の被着面に接着している粘着剤層１２の粘着力、並びに粘着剤層１２の凝集力即ち粘着剤層１２が内部破壊に耐える力を下回ることから、被着体３が基材１１から引き剥がされる（粘着剤層１２と被着体３との間で剥離する界面剥離、粘着剤層１２内部で破壊が生じる凝集破壊、または粘着剤層１２と基材１１との間で破壊が生じる投錨破壊が起こる）よりも先に、基材１１自体が層間破壊または層間剥離を起こす。   When the overlapping adherend 3 is peeled off from the double-sided pressure-sensitive adhesive tape 1 and developed, an external force that separates one surface from the other surface acts on both the front and back surfaces of the substrate 11. Will be. The internal bond strength or delamination strength of the base material 11 is such that the adhesive strength of the adhesive layer 12 bonding the base material 11 to the adherend surface of the adherend 3 and the aggregation of the adhesive layer 12 Since the force, that is, the pressure-sensitive adhesive layer 12 is less than the resistance to internal destruction, the adherend 3 is peeled off from the base material 11 (interfacial peeling, pressure-sensitive adhesive peeling between the pressure-sensitive adhesive layer 12 and the adherend 3). The base material 11 itself causes delamination or delamination prior to cohesive failure in which breakage occurs in the layer 12 or throwing failure in which breakage occurs between the pressure-sensitive adhesive layer 12 and the base material 11).

結果、図６及び図７に示すように、基材１１が二分されて、その各部分が、展開した被着体３における隠蔽するべき情報が表示されている領域の全体に接着してこれを覆う様相を呈する。このとき、二分された基材１１の各部分は依然として、可視光を透過させ難い、被着体３に表示されている情報を透かし見ることのできない不透明な状態を維持する程度の厚みを有している。   As a result, as shown in FIGS. 6 and 7, the base material 11 is divided into two parts, and each part adheres to the entire area where the information to be concealed in the developed adherend 3 is displayed. It looks like it covers. At this time, each portion of the bisected substrate 11 still has a thickness that is difficult to transmit visible light and maintains an opaque state in which the information displayed on the adherend 3 cannot be seen through. ing.

基材１１として好適な紙材料を選定するにあたり、紙の内部結合強さまたは層間剥離強さを測定する方法としては、例えばＪＡＰＡＮ ＴＡＰＰＩ（紙パルプ技術協会）紙パルプ試験方法Ｎｏ．１８−１：２００７（紙及び板紙−内部結合強さ試験方法−第１部：Ｚ軸方向引張試験法）、Ｎｏ．１８−２：２０００（紙及び板紙−内部結合強さ試験方法−第２部：インターナルボンドテスタ法）、Ｎｏ．１９−１：２０００（板紙−すき合わせ層のはく離強さ試験方法−第１部：最大荷重測定法）、Ｎｏ．１９−２：（板紙−すき合わせ層のはく離強さ試験方法−第２部：平均荷重測定法）が知られている。但し、試験方法Ｎｏ．１８は、紙の表裏両面に文字通りその面と垂直な方向の外力を面全体に加えるもので、両面粘着テープ１の両面に接着した被着体３を引き剥がすような操作がなされるときに基材１１に作用する力とは厳密には合致しない可能性がある。基材１１に作用する力の点では、試験方法Ｎｏ．１９の方がより実態に近いと言えよう。尤も、試験方法Ｎｏ．１９が本来評価の対象としているのは、外層の片面または両面が中間層と異なった紙料でできているすき合わせ板紙である。   In selecting a suitable paper material as the base material 11, as a method for measuring the internal bond strength or delamination strength of paper, for example, JAPAN TAPPI (Paper Pulp Technology Association) Paper Pulp Test Method No. 18-1: 2007 (paper and paperboard-internal bond strength test method-Part 1: Z-axis direction tensile test method), No. 18-2: 2000 (paper and paperboard-internal bond strength test method-Part 2: internal bond tester method), 19-1: 2000 (paperboard-peeling strength test method of the laminated layer-part 1: maximum load measuring method), No. 19-2: (Paperboard—Peeling strength test method for squeezed layers—Part 2: Average load measurement method) is known. However, test method no. 18 applies an external force in the direction perpendicular to the front and back surfaces of the paper to both the front and back surfaces of the paper. The force acting on the material 11 may not exactly match. In terms of the force acting on the substrate 11, the test method No. It can be said that 19 is more realistic. However, test method no. What 19 is originally intended for evaluation is a bonded paperboard made of a paper material having one or both sides of the outer layer different from the intermediate layer.

参考として、図９及び図１０に、各種の紙材料の内部結合強さまたは層間剥離強さを測定した結果を示す。測定を行った紙材料は、
（Ｉ）色上質紙 紀州レインボー（登録商標、北越紀州製紙株式会社製） 黒色 特薄口
（II）色上質紙 紀州レインボー 黒色 薄口
（III）色上質紙 紀州レインボー 黒色 厚口
（IV）封筒用紙（色晒クラフト紙） コニーラップ（登録商標、リンテック株式会社製） 黒色 米坪５０ｇ／ｍ2
（Ｖ）封筒用紙 コニーラップ 黒色 米坪７０ｇ／ｍ2
（VI）封筒用紙 コニーラップ 黒色 米坪８５ｇ／ｍ2
（VII）コピー用紙 ＫＢ用紙（コクヨ株式会社製） 米坪６４ｇ／ｍ2
（VIII）白封筒
（IX）嵩高微塗工紙（マット） ＨＳハミング（登録商標、北越紀州製紙株式会社製） 米坪７０ｇ／ｍ2
である。 For reference, FIGS. 9 and 10 show the results of measuring the internal bond strength or delamination strength of various paper materials. The measured paper material is
(I) Kishu Rainbow (registered trademark, manufactured by Hokuetsu Kishu Paper Co., Ltd.) Bleached kraft paper) Cony wrap (registered trademark, manufactured by Lintec Corporation) Black 50m / m 2
(V) Envelope paper Cony wrap Black 70 tsubo / m 2
(VI) Envelope paper Cony wrap Black 85 tsubo / m 2
(VII) copy paper KB paper (Kokuyo Co., Ltd.) basis weight 64g / m 2
(VIII) white envelope (IX) bulky fine-coated paper (mat) HS Hamming (registered trademark, Hokuetsu Kishu Paper Co., Ltd.) basis weight 70g / m 2
It is.

測定方法は、概ねＪＡＰＡＮ ＴＡＰＰＩ紙パルプ試験方法Ｎｏ．１９−１に準じているが、細部が異なるので、以下に補足説明する。ここで行った測定では、内部結合強さまたは層間剥離強さを測定する対象となる紙材料の試験片を、長手方向に沿って３０ｍｍ、長手方向と直交する幅方向に沿って１５ｍｍの大きさに切り出す。そして、図１１に示すように、切り出した試験片４の表裏両面にそれぞれ、プラスチックフィルム（例えば、厚さ５０μｍのＰＥＴ（ポリエチレンテレフタラート）フィルム）５を、粘着剤６を使用して接着する。各プラスチックフィルム５は、試験片４の長手方向に沿って当該試験片４の先端よりも先方に突出している。   The measuring method is generally JAPAN TAPPI paper pulp test method No. Although it conforms to 19-1, the details are different, so a supplementary explanation will be given below. In the measurement performed here, a test piece of paper material to be measured for internal bond strength or delamination strength is 30 mm along the longitudinal direction and 15 mm along the width direction perpendicular to the longitudinal direction. Cut into Then, as shown in FIG. 11, a plastic film (for example, a PET (polyethylene terephthalate) film having a thickness of 50 μm) 5 is bonded to both the front and back surfaces of the cut specimen 4 using an adhesive 6. Each plastic film 5 protrudes ahead of the tip of the test piece 4 along the longitudinal direction of the test piece 4.

その上で、各プラスチックフィルム５における試験片５の先端よりも突出した先端部をクランプ７で保持し、それらクランプ７を介して両プラスチックフィルム５の先端部を互いに離反する方向に引っ張ることで、試験片４の層間破壊または層間剥離を惹起し、試験片４の表面側の層を裏面側の層から剥離させるとともに、その間の最も強い荷重を（内部結合強さまたは層間剥離強さを表す指標値として）計測、記録した。なお、剥離操作中、試験片４の剥がされていない部分がクランプ７による引っ張り方向に対して略直角となるように維持する。一方のクランプ７の他方のクランプ７に対する（他方のクランプ７から離反する方向への）相対的な移動速度は、１００ｍｍ／分に設定した。測定対象とした各紙材料毎に、三枚の試験片４を用意し、三回の測定を行った。測定時の室温は２３℃、湿度は５０％であった。   In addition, by holding the tip portion protruding from the tip of the test piece 5 in each plastic film 5 with the clamp 7, by pulling the tip portions of the two plastic films 5 away from each other via the clamp 7, The test piece 4 is delaminated or delaminated, and the front side layer of the test piece 4 is peeled off from the back side layer, and the strongest load between them (indicating the internal bond strength or delamination strength) Measured and recorded). During the peeling operation, the portion of the test piece 4 that has not been peeled off is maintained so as to be substantially perpendicular to the pulling direction by the clamp 7. The relative moving speed of one clamp 7 with respect to the other clamp 7 (in the direction away from the other clamp 7) was set to 100 mm / min. Three test pieces 4 were prepared for each paper material to be measured, and measurement was performed three times. The room temperature during the measurement was 23 ° C. and the humidity was 50%.

図９及び図１０に示すように、（Ｉ）ないし（III）の色上質紙の内部結合強さまたは層間剥離強さは、その米坪即ち厚さによらず、（IV）ないし（VI）の封筒用紙や（VIII）の白封筒の内部結合強さまたは層間剥離強さよりも強い。従って、（Ｉ）ないし（III）の色上質紙を両面粘着テープ１の基材１１に用いれば、（IV）ないし（VI）の封筒用紙や（VIII）の白封筒を被着体３として両面粘着テープ１を接着し、その後当該粘着テープ１から被着体３を引き剥がした場合に、被着体３が層間破壊または層間剥離を起こすよりも先に、基材１１が層間破壊または層間剥離を起こす。結果として、図６及び図７に示したように、封筒のような被着体３の表面に記載または印字された情報を好適に隠蔽することができる。つまるところ、基材１１は、その内部結合強さまたは層間剥離強さが両面粘着テープ１の用途上想定される被着体３よりも弱いものを選択することが望ましい。   As shown in FIG. 9 and FIG. 10, the internal bond strength or delamination strength of the colored fine papers (I) to (III) is independent of the US basis weight or thickness (IV) to (VI). It is stronger than the internal bond strength or delamination strength of the envelope paper of (VIII) and the white envelope of (VIII). Therefore, if the quality papers (I) to (III) are used for the base material 11 of the double-sided pressure-sensitive adhesive tape 1, both sides of the envelope paper (IV) to (VI) and the white envelope (VIII) are used as the adherend 3. When the adhesive tape 1 is bonded and then the adherend 3 is peeled off from the adhesive tape 1, the substrate 11 is delaminated or delaminated before the adherend 3 causes delamination or delamination. Wake up. As a result, as shown in FIGS. 6 and 7, information described or printed on the surface of the adherend 3 such as an envelope can be suitably concealed. In other words, it is desirable to select the substrate 11 having a weaker internal bond strength or delamination strength than that of the adherend 3 assumed for use of the double-sided pressure-sensitive adhesive tape 1.

既製の粘着剤には、十分に強固な粘着性能を有するものが多数存在している。よって、粘着剤層１２の材料として、粘着力及び凝集力が基材１１の内部結合強さまたは層間剥離強さを上回るような粘着剤を、既存のものの中から選定することは容易である。   Many ready-made adhesives have sufficiently strong adhesive performance. Therefore, it is easy to select an adhesive that has an adhesive force and a cohesive force that exceed the internal bond strength or delamination strength of the substrate 11 from among existing materials as the material of the adhesive layer 12.

本実施形態によれば、情報が表された被着体３に貼付することで当該情報を好適に隠蔽できる両面粘着テープ１を実現できる。この粘着テープ１の基材１１及び粘着剤層１２は、必ずしも被着体３における隠蔽するべき情報が表示された領域の全体を覆うように貼付する必要はなく、同領域の半分以上の面積に貼付すればよい。よって、材料コストが低減され、経済的である。   According to this embodiment, the double-sided pressure-sensitive adhesive tape 1 capable of suitably concealing the information can be realized by applying the information to the adherend 3 on which the information is represented. The base material 11 and the pressure-sensitive adhesive layer 12 of the pressure-sensitive adhesive tape 1 do not necessarily need to be pasted so as to cover the entire area where the information to be concealed in the adherend 3 is displayed. Affix it. Therefore, the material cost is reduced and it is economical.

なお、本発明は以上に詳述した実施形態に限られるものではない。例えば、上記実施形態では、所定方向に延伸する長尺な帯状の両面粘着テープ１を想定していたが、これを縦横に拡張したシート状に成形して両面粘着シートとしてもよいことは言うまでもない。   The present invention is not limited to the embodiment described in detail above. For example, in the above embodiment, a long belt-like double-sided pressure-sensitive adhesive tape 1 extending in a predetermined direction is assumed, but it goes without saying that the double-sided pressure-sensitive adhesive sheet may be formed into a sheet shape that is expanded vertically and horizontally. .

その他、各部の具体的な構成は、本発明の趣旨を逸脱しない範囲で種々変形が可能である。   In addition, the specific configuration of each part can be variously modified without departing from the spirit of the present invention.

１…両面粘着テープ
１１…基材
１２…粘着剤層
１３…支持体
１４…切れ目
３…被着体 DESCRIPTION OF SYMBOLS 1 ... Double-sided adhesive tape 11 ... Base material 12 ... Adhesive layer 13 ... Support body 14 ... Break 3 ... Adhered body

Claims (4)

何らかの情報が表された被着体に貼付することで当該情報を隠蔽することのできる両面粘着テープまたは両面粘着シートであって、
被着体に粘着する粘着剤層と、
両面に前記粘着剤層が設けられその両面が粘着剤層を介して互いに重なり合う被着体の各々に接着するとともに、それら被着体を引き剥がすような外力が作用した際に層間破壊または層間剥離を起こして二分され、その各部分がそれぞれ被着体に接着したまま情報を透かし見ることのできない不透明な状態を維持する基材と
を具備する両面粘着テープまたは両面粘着シート。 A double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet capable of concealing the information by sticking to an adherend on which some information is represented
An adhesive layer that adheres to the adherend,
The pressure-sensitive adhesive layer is provided on both surfaces, and the both surfaces adhere to each of the adherends that overlap each other via the pressure-sensitive adhesive layer, and when an external force acts to peel off the adherends, delamination or delamination A double-sided pressure-sensitive adhesive tape or a double-sided pressure-sensitive adhesive sheet, comprising: a base material that is divided into two parts and maintains a non-transparent state in which information cannot be seen through with each part adhered to the adherend. 前記基材がパルプ繊維から構成された紙を主体とする請求項１記載の両面粘着テープまたは両面粘着シート。 The double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet according to claim 1, wherein the base material is mainly paper made of pulp fibers. 前記基材の色が黒色である請求項１または２記載の両面粘着テープまたは両面粘着シート。 The double-sided pressure-sensitive adhesive tape or double-sided pressure-sensitive adhesive sheet according to claim 1 or 2, wherein the color of the substrate is black. 所定方向に延伸する長尺な帯状をなしており、
前記基材の一方の面に前記粘着剤層を介して接着した剥離容易な支持体を具備し、
前記基材及び前記粘着剤層を前記所定方向に沿って配列された複数の断片に分断するような切れ目が基材及び粘着剤層に形成されている請求項１、２または３記載の両面粘着テープまたは両面粘着シート。 It has a long belt shape extending in a predetermined direction,
Comprising an easily peelable support bonded to the one surface of the substrate via the pressure-sensitive adhesive layer;
The double-sided pressure-sensitive adhesive according to claim 1, 2 or 3, wherein the base material and the pressure-sensitive adhesive layer have cuts that divide the base material and the pressure-sensitive adhesive layer into a plurality of pieces arranged along the predetermined direction. Tape or double-sided adhesive sheet.
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JP2018169532A (en) * 2017-03-30 2018-11-01 リンテック株式会社 Pseudo adhesive label

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