JP5037048B2 - Pressure sensitive transfer tape - Google Patents
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- JP5037048B2 JP5037048B2 JP2006190216A JP2006190216A JP5037048B2 JP 5037048 B2 JP5037048 B2 JP 5037048B2 JP 2006190216 A JP2006190216 A JP 2006190216A JP 2006190216 A JP2006190216 A JP 2006190216A JP 5037048 B2 JP5037048 B2 JP 5037048B2
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本発明は、テープ基材上に粘着剤層を設けた感圧転写テープに関するものである。 The present invention relates to a pressure-sensitive transfer tape having a pressure-sensitive adhesive layer provided on a tape substrate.
近年、両面粘着テープの一つに支持体（芯材）を有さず粘着剤層のみを被着材に転写する無支持体両面粘着テープがあり、感圧転写粘着テープとして様々な分野・用途で使用されている。その構造としては剥離ライナーあるいは剥離性基材の片面に粘着剤層を設けてロール状に巻いたものが多く、最近では主に事務用途向けとして、これらを小巻にして装着した転写装置が「テープのり」などの名称で市販されている。 In recent years, one type of double-sided pressure-sensitive adhesive tape has a non-supported double-sided pressure-sensitive adhesive tape that does not have a support (core material) and transfers only the adhesive layer to the adherend. Used in. As its structure, there are many rolls with a pressure-sensitive adhesive layer provided on one side of a release liner or releasable substrate. It is marketed under names such as “tape glue”.
このような転写装置として、特許文献１は、感圧転写粘着テープを巻き付ける送出リールと、この送出リールより供給される感圧転写粘着テープの粘着剤層を基材から剥離しながら被転写体へ転写させる転着ヘッドと、転写使用後に残った基材を巻き取る巻回リールとを片手で把持使用が可能な容器本体内に装備したことを特徴とする転写装置を開示している。このような装置は、紙の接着において一般に用いられている液体のりや固形のりとは異なり、手を汚すことなく簡単に粘着剤を被着材へと転写でき、接着するまでの乾燥時間が不要である、被着材である紙がしわにならないなどの利点がある。さらにこれらは、必要長さの粘着剤を被着材に転写した後に転写具を被着材から垂直に持ち上げたり横に払うなどすることによって粘着剤層を切断できるので、支持体を有する一般的な両面テープのようにあらかじめテープを必要な長さに切断しておく必要がなく、また、粘着剤層を転写し終えた剥離性基材は転写具内のリールに巻き取られるので使用時にごみが発生しないなど、非常に便利な接着装置である。 As such a transfer apparatus, Patent Document 1 discloses that a feeding reel around which a pressure-sensitive transfer adhesive tape is wound and an adhesive layer of the pressure-sensitive transfer adhesive tape supplied from the feeding reel are peeled off from a substrate to a transfer target. There is disclosed a transfer apparatus characterized in that a transfer head for transfer and a winding reel for winding a substrate remaining after transfer use are provided in a container body that can be held and used with one hand. Unlike liquid glue and solid glue, which are commonly used in paper bonding, such an apparatus can easily transfer the adhesive to the substrate without soiling your hands, eliminating the need for drying time before bonding. There is an advantage that the paper as the adherend does not wrinkle. In addition, since the adhesive layer can be cut by lifting the transfer tool vertically from the adherend or by paying it sideways after transferring the required length of the adhesive to the adherend, it is common to have a support. It is not necessary to cut the tape to the required length like a double-sided tape, and the peelable substrate after the adhesive layer has been transferred is wound around the reel in the transfer tool, so it is trashed during use. It is a very convenient bonding device that does not generate any problems
しかしながら、このような装置においては、粘着剤層を切断する際、粘着剤層の粘着剤が連続状に塗布されているため切断時に粘着剤が糸を引くように伸びてしまい円滑に切断できない、いわゆる「のり切れ」が悪いという問題があった。この問題を回避するため、従来、粘着剤層を細かいドット状にパターン化したり、間隔を大きく開けてブロック状に配するといった方法が考案されている。ドット状のパターンとしては丸、三角、多角形等の形状が提案され、また、ブロック状のパターンとしては四角形状が提案されている（図１及び図２参照）。これらの方法において、丸形パターンの粘着剤層は四角形の粘着剤層に比べて基材に対する占有面積が小さくせざるをえなく、接着力が低下するという欠点がある。そこで、丸形パターンの粘着剤層の基材に対する占有面積を上げるために、丸形のドット同士の間隔を狭くすると、ドット同士が接触してしまい、利点である「のり切れ」が悪くなる。また、特許文献１は、ドット状のパターンの粘着剤層の基材に対する占有面積を上げるために、ドット同士の間隔を狭くすることを提案している。これにより、十分な接着力を保持しつつ良好なのり切れ性を有する感圧転写粘着テープを提供している。この方法においては、また、転写始めの粘着剤の転写不良が生じることや、さらなるのり切れ性の向上が求められている。 However, in such an apparatus, when cutting the pressure-sensitive adhesive layer, the pressure-sensitive adhesive of the pressure-sensitive adhesive layer is continuously applied, so the pressure-sensitive adhesive stretches as if pulling a thread at the time of cutting and cannot be cut smoothly. There was a problem that the so-called “paste” was bad. In order to avoid this problem, conventionally, a method has been devised in which the pressure-sensitive adhesive layer is patterned into fine dots or is arranged in blocks with large intervals. As the dot-like pattern, shapes such as a circle, a triangle, and a polygon are proposed, and as the block-like pattern, a quadrangular shape is proposed (see FIGS. 1 and 2). In these methods, the pressure-sensitive adhesive layer having a round pattern has a drawback in that it occupies a smaller area with respect to the substrate than the rectangular pressure-sensitive adhesive layer, and the adhesive strength is reduced. Therefore, if the interval between the round dots is narrowed in order to increase the area occupied by the adhesive layer of the round pattern on the base material, the dots come into contact with each other. Further, Patent Document 1 proposes to narrow the interval between dots in order to increase the area occupied by the adhesive layer of the dot-like pattern with respect to the base material. Thus, a pressure-sensitive transfer pressure-sensitive adhesive tape having a good tearability while maintaining a sufficient adhesive force is provided. In this method, a transfer failure of the adhesive at the beginning of transfer is required, and further improvement in tearing is demanded.
そこで、本発明者は、四角形状の粘着剤層のドットパターンを検討した結果、図２に見られるような粘着剤層の四角形の辺が転写方向と平行になる場合は、図１に見られるような丸形状の粘着剤層のドットパターンに比べて、基材に対する占有面積は上げ易いが、転写終端部でのり部分と被転写物との接触辺が大きくなり、のり切れが悪い。これに対して、図３のように、転写方向に対して、粘着剤層の四角形の辺が約４５度の傾きを有するように配置すると、基材に対する占有面積が上げられ、かつ、粘着剤層の四角形の終端でののり切れも良くなる。しかし、図４のような配置でも、粘着剤層の転写始めの転写不良（転写性の悪さ）が生じる問題があった。 Therefore, the present inventor has examined the dot pattern of the rectangular adhesive layer, and as a result, when the square side of the adhesive layer as shown in FIG. 2 is parallel to the transfer direction, it can be seen in FIG. Compared to the dot pattern of such a round pressure-sensitive adhesive layer, the occupied area with respect to the substrate is easy to increase, but the contact side between the paste portion at the transfer end portion and the transferred object is large, and the paste is poor. On the other hand, as shown in FIG. 3, when the square side of the pressure-sensitive adhesive layer is arranged so as to have an inclination of about 45 degrees with respect to the transfer direction, the occupied area with respect to the substrate is increased, and the pressure-sensitive adhesive The cutting at the end of the square of the layer is also improved. However, even with the arrangement as shown in FIG. 4, there is a problem that a transfer failure (poor transferability) at the beginning of transfer of the pressure-sensitive adhesive layer occurs.
さらに、本発明者は上記の問題点を解決すべく種々検討した結果本発明を完成したもであって、本発明の目的は十分な接着力を保持しつつ転写始めの良好な粘着剤転写性及び転写終わりの粘着剤切れ性を有する感圧転写テープを提供するものである。 Furthermore, the present inventor has completed the present invention as a result of various studies to solve the above-described problems, and the object of the present invention is to provide a good adhesive transferability at the beginning of transfer while maintaining a sufficient adhesive force. And a pressure-sensitive transfer tape having the adhesive finish at the end of transfer.
本発明の感圧転写テープは、基材上に粘着剤層を有する感圧転写テープであって、前記粘着剤層は粘着剤からなる複数の四角形状の粘着剤層が島模様状に前記基材に配置されており、前記複数の四角形状の粘着剤層の各辺が転写方向に対して４０〜５０度傾いており、かつ、前記四角形状の粘着剤層の転写方向の先端の角が欠けていることを特徴とする感圧転写テープである。 The pressure-sensitive transfer tape of the present invention is a pressure-sensitive transfer tape having a pressure-sensitive adhesive layer on a substrate, and the pressure-sensitive adhesive layer comprises a plurality of square-shaped pressure-sensitive adhesive layers made of pressure-sensitive adhesive in an island pattern. Each side of the plurality of square-shaped pressure-sensitive adhesive layers is inclined by 40 to 50 degrees with respect to the transfer direction, and the corner of the tip of the square-shaped pressure-sensitive adhesive layer in the transfer direction is It is a pressure-sensitive transfer tape characterized by lacking.
本発明の前記の感圧転写テープにおいては、前記四角形状の粘着剤層の転写方向の先端の角が欠けている割合は、転写方向に対して垂直な方向の前記四角形状の対角線を境にして、前記先端が欠けている角を有する三角形の面積の前記先端が欠けている角を有しない他方の三角形の面積に対する面積比として、７０％以上９５％以下であることが好ましい。 In the pressure-sensitive transfer tape of the present invention, the proportion of the square-shaped pressure-sensitive adhesive layer lacking the tip corner in the transfer direction is bordered by the square diagonal line in the direction perpendicular to the transfer direction. Thus, the area ratio of the area of the triangle having the corner lacking the tip to the area of the other triangle not having the corner lacking the tip is preferably 70% or more and 95% or less.
本発明の前記の感圧転写テープにおいては、前記四角形状が転写方向に対称な四角形状または等辺四角形状であることが好ましい。 In the pressure-sensitive transfer tape of the present invention, the quadrangular shape is preferably a quadrangular shape or an equilateral quadrangular shape that is symmetrical in the transfer direction.
本発明の感圧転写テープは、基材上に粘着剤層を有する感圧転写テープであって、前記粘着剤層は粘着剤からなる複数の四角形状の粘着剤層が島模様状に前記基材に配置されており、前記複数の四角形状の粘着剤層の各辺が転写方向に対して好ましくは４０〜５０度、特に好ましくは約４５度傾いており、かつ、前記四角形状の粘着剤層の転写方向の先端の角が欠けていることを特徴とする感圧転写テープである（図３参照）。このように、複数の四角形状の粘着剤層を島模様状に前記基材上に配置し、かつ、前記複数の四角形状の粘着剤層の各辺が転写方向に対して約４５度傾いることにより、基材に対する粘着剤層の占有面積が上げられ、十分な接着力を保持しつつ、転写終わりの良好な粘着剤切れ性を有する。また、四角形状の粘着剤層の転写方向の先端の角が欠けていることにより、転写始めの良好な粘着剤転写性も有する。 The pressure-sensitive transfer tape of the present invention is a pressure-sensitive transfer tape having a pressure-sensitive adhesive layer on a substrate, and the pressure-sensitive adhesive layer comprises a plurality of square-shaped pressure-sensitive adhesive layers made of pressure-sensitive adhesive in an island pattern. Each side of the plurality of square-shaped pressure-sensitive adhesive layers is preferably 40 to 50 degrees, particularly preferably about 45 degrees with respect to the transfer direction, and the square-shaped pressure-sensitive adhesive The pressure-sensitive transfer tape is characterized in that a corner at the tip in the transfer direction of the layer is missing (see FIG. 3). In this way, a plurality of square-shaped pressure-sensitive adhesive layers are arranged on the base material in an island pattern, and each side of the plurality of square-shaped pressure-sensitive adhesive layers is inclined by about 45 degrees with respect to the transfer direction. As a result, the area occupied by the pressure-sensitive adhesive layer with respect to the substrate is increased, and the adhesive layer has good pressure-sensitive adhesive cut-off properties while maintaining a sufficient adhesive force. Moreover, since the corner | angular | corner of the front-end | tip of the transfer direction of a square-shaped adhesive layer is missing, it has favorable adhesive transfer property of the transfer start.
本発明の感圧転写テープにおいては、前記四角形状の粘着剤層の転写方向の先端の角が欠けている割合は、転写方向に対して垂直な方向の前記四角形状の対角線を境にして、前記先端が欠けている角を有する三角形の面積の前記先端が欠けている角を有しない他方の三角形の面積に対する面積比として、７０％以上９５％以下であることが好ましい。この範囲で、特に、転写始めの良好な粘着剤転写性が得られる。 In the pressure-sensitive transfer tape of the present invention, the proportion of the square-shaped pressure-sensitive adhesive layer lacking the corner at the tip in the transfer direction is bordered by the square-shaped diagonal in the direction perpendicular to the transfer direction, It is preferable that the area ratio of the area of the triangle having the corner lacking the tip to the area of the other triangle not having the corner lacking the tip is 70% or more and 95% or less. In this range, particularly good adhesive transferability at the beginning of transfer can be obtained.
本発明における粘着剤層の形状は、転写方向に対して各辺が約４５度傾いている四角形状であれば特に限定がないが、転写方向に対称な四角形状または等辺四角形状であり、特に、正四角形状および等辺ひし形状が特に好ましい。 The shape of the pressure-sensitive adhesive layer in the present invention is not particularly limited as long as each side is inclined by about 45 degrees with respect to the transfer direction, but is a quadrangular shape or an equilateral quadrangular shape symmetrical to the transfer direction. A square shape and an equilateral rhombus shape are particularly preferable.
本発明における感圧転写テープの粘着剤層に使用される粘着剤としては、従来知られている粘着剤がいずれも使用できる。たとえばアクリル系、ゴム系、シリコン系、ロジン系などのものがあげられ、さらに必要に応じてフィラーや保存剤、着色剤などの各種添加剤を配合することができる。 As the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer of the pressure-sensitive transfer tape in the present invention, any conventionally known pressure-sensitive adhesive can be used. Examples include acrylic, rubber-based, silicon-based, and rosin-based materials, and various additives such as fillers, preservatives, and colorants can be blended as necessary.
また、本発明における感圧転写テープの基材としては、粘着剤に対して剥離効果を有するのであれば、いずれのものも使用できる。例えばポリエチレン、ポリエチレンテレフタレート、ポリプロピレン、ポリ塩化ビニル等のプラスチックフィルム、グラシン紙等の紙、金属箔等であり、剥離効果を付与するために必要に応じて片面もしくは両面にシリコン樹脂やフッ素樹脂などからなる剥離層が設けられる。一般的に、基材の厚さは１０〜６０μｍが適当である（特許文献１および特許文献２）。 In addition, as the base material of the pressure-sensitive transfer tape in the present invention, any material can be used as long as it has a peeling effect on the adhesive. For example, plastic film such as polyethylene, polyethylene terephthalate, polypropylene, polyvinyl chloride, paper such as glassine paper, metal foil, etc., from one side or both sides as necessary to give a peeling effect from silicon resin or fluorine resin A release layer is provided. Generally, the thickness of the base material is suitably 10 to 60 μm (Patent Document 1 and Patent Document 2).
転写方向の先端の角が欠けている四角形状の粘着剤層を形成する方法としては、シルクスクリーン、グラビア、インクジェット等何れの塗布手段も用いることができる。例えば、グラビア方法においては、転写方向の先端の角が欠けている四角形状に対応させて、予めブラビア版の溝を埋めた形状にすることにより形成できる。また、先端の角が欠けていない四角形状のグラビア版の溝を使用して、先端の角が欠けていない四角形状を塗布できる最適塗工速度より速い塗工速度で、粘着剤を塗布することにより、転写方向の先端の角が欠けている四角形状の粘着剤層を形成できる。 As a method for forming a square-shaped pressure-sensitive adhesive layer lacking the corner at the tip in the transfer direction, any coating means such as silk screen, gravure, and ink jet can be used. For example, in the gravure method, it can be formed by previously filling the groove of the BRAVIA plate so as to correspond to a quadrangular shape in which the corner of the tip in the transfer direction is missing. Also, use a gravure groove with a square shape with no corners at the tip, and apply the adhesive at a coating speed faster than the optimum coating speed for applying a square shape with no corners at the tip. Thus, a square-shaped pressure-sensitive adhesive layer lacking the corner at the tip in the transfer direction can be formed.
複数の四角形状の粘着剤層の個々の大きさは、通常１〜１００ｍｍ2、好ましくは３〜３６ｍｍ2で、隣接する島相互の間隔は通常０．１〜４ｍｍ、好ましくは０．３〜２．５ｍｍである（特許文献１）。個々の島の大きさを１００ｍｍ2以上にすると粘着剤層を切断する位置の自由度がなくなり、１ｍｍ2以下だと粘着剤の被着材への接触が「面」ではなく「点」に近くなることから十分な接着力が得られない。また隣接する島相互の間隔を４ｍｍ以上にすると被着面に対する有効粘着剤面積が低下し十分な接着力を得られない。間隔が０．１ｍｍ以下では粘着剤がもつ流動性ゆえに隣り合った区画の粘着剤層同士が接触してしまうため、粘着剤を基材上に意図した模様で塗布することが難しく良好なのり切れ性が得られない。 The size of each of the plurality of square-shaped pressure-sensitive adhesive layers is usually 1 to 100 mm 2 , preferably 3 to 36 mm 2 , and the distance between adjacent islands is usually 0.1 to 4 mm, preferably 0.3 to 2. 0.5 mm (Patent Document 1). If the size of each island is 100 mm 2 or more, the degree of freedom in cutting the adhesive layer is lost, and if it is 1 mm 2 or less, the contact of the adhesive to the adherend is close to “point” instead of “surface”. Therefore, sufficient adhesive strength cannot be obtained. If the distance between adjacent islands is 4 mm or more, the effective pressure-sensitive adhesive area with respect to the adherend surface is reduced, and sufficient adhesive force cannot be obtained. Adhesive layers in adjacent compartments come into contact with each other due to the fluidity of the adhesive when the spacing is 0.1 mm or less, so it is difficult to apply the adhesive in the intended pattern on the substrate, and good wear resistance Cannot be obtained.
以下の実施例により、本発明を詳細に説明するが、本発明はこれらに限定されるものでない。 The following examples explain the present invention in detail, but the present invention is not limited thereto.
粘着剤として市販のアクリル系粘着剤を、両面剥離処理したポリエチレンテレフタレート製フィルムからなるテープ基材にグラビア印刷で塗布して、図４に示すような四角形状でかつ転写方向の先端の角が欠けている粘着剤層を、先端の角の欠け部分のサイズを変えながら、感圧転写テープを得た。粘着剤層の各四角形状の面積を２．２ｍｍ2（欠けのある例においては欠けがない場合の面積）、隣接する粘着剤層相互の間隔を０．３ｍｍとした。
なお、複数の四角形状の粘着剤層の各辺が転写方向に対して約４５度（４０〜５０度）傾いており、粘着剤層の先端の角の欠け部分のサイズは、図５に示すように、転写方向に対して垂直な方向の四角形状の対角線を境にして、先端が欠けている角を有する三角形の面積（Ａ）の、先端が欠けている角を有しない他方の三角形の面積（Ｂ）に対する面積比として表した。
A commercially available acrylic pressure-sensitive adhesive is applied by gravure printing to a tape substrate made of a polyethylene terephthalate film that has been subjected to double-sided release treatment, resulting in a square shape as shown in FIG. The pressure-sensitive transfer tape was obtained while changing the size of the chipped portion at the tip of the adhesive layer. The area of each quadrangular shape of the pressure-sensitive adhesive layer was 2.2 mm 2 (in the case of chipping, the area when there was no chipping), and the interval between adjacent pressure-sensitive adhesive layers was 0.3 mm.
In addition, each side of the plurality of square-shaped pressure-sensitive adhesive layers is inclined about 45 degrees (40 to 50 degrees) with respect to the transfer direction. As described above, the area (A) of a triangle having a corner with a missing tip with respect to a quadrilateral diagonal line in a direction perpendicular to the transfer direction, the other triangle having no corner with a missing tip. Expressed as area ratio to area (B).
粘着剤層の先端の角の欠け部分のサイズ［Ａ／Ｂ×１００（％）］を、６５％、７０％、８０％、９５％、１００％（比較例として先端が欠けてないもの）と変えて作製した感圧転写テープを評価した。なお、７０％と８０％の実施例例については、先端の角の欠けを作製する手段として、予めグラビア版の、前記欠けに相当する部分を埋めた版を用いる方法、６５％と９５％の実施例については最適塗工速度より速い速度、具体的には最適塗工速度の１２０％（Ａ／Ｂ＝９５％の実施例）、１５０％（Ａ／Ｂ＝６５％の実施例）で塗工する方法をそれぞれ用いた。
また、比較例として、図１および２に示される感圧転写テープを作製し、同様に評価した。これらの評価結果を表１に示す。
なお、実際の量産的塗工速度で塗工した四角形状の粘着剤層において、転写方向の先端の角を意識的に欠けさせている部分以外の四角形状の各角は、図２〜４に見られるいずれのパターンにおいても、小さいまるびをおびるものとなっている。
65%, 70%, 80%, 95%, 100% (the tip is not missing as a comparative example) [A / B × 100 (%)] The pressure-sensitive transfer tape produced by changing was evaluated. In the examples of 70% and 80%, a method using a gravure plate in which a portion corresponding to the chip is filled in advance is used as a means for producing a chipped corner, 65% and 95%. For the examples, coating was performed at a speed higher than the optimum coating speed, specifically, 120% of the optimum coating speed (A / B = 95% of the examples) and 150% (A / B = 65% of the examples). Each method was used.
As a comparative example, a pressure-sensitive transfer tape shown in FIGS. 1 and 2 was produced and evaluated in the same manner. These evaluation results are shown in Table 1.
In addition, in the square-shaped pressure-sensitive adhesive layer applied at an actual mass-production coating speed, each square corner other than the portion where the corner at the tip in the transfer direction is intentionally missing is shown in FIGS. In every pattern that can be seen, there is a small roundness.
（評価方法）
接着力は、角の欠け部分なし四角形状（Ａ／Ｂ＝１００％、図３のもの）の接着力を基準（１００％）として評価した。
接着力の評価基準：
◎：９０％以上、接着力が強い。
○：８５％以上、接着力がやや強い。
△：７５％以上、接着力が弱いが、実用上問題なし。
×：７５％未満、接着力が弱く、実用上問題があり。
(Evaluation method)
The adhesive strength was evaluated based on the adhesive strength of a square shape (A / B = 100%, as shown in FIG. 3) having no corner chipped portions as a reference (100%).
Adhesive strength evaluation criteria:
A: 90% or more, strong adhesion.
○: 85% or more, adhesive strength is slightly strong.
Δ: 75% or more, adhesive strength is weak, but there is no practical problem.
X: Less than 75%, adhesive strength is weak, and there are practical problems.
転写始めの転写性および転写終わりの粘着層切れ性は、肉眼で観察により調べた。
転写始めの転写性、転写終わりの粘着層切れ性および総合評価の評価基準：
◎：きわめて良好。
○：良好。
△：やや不良、実用上問題がある場合もあり。
×：不良、実用上問題あり。
The transferability at the beginning of transfer and the adhesive layer breakability at the end of transfer were examined by observation with the naked eye.
Evaluation criteria of transferability at the beginning of transfer, adhesive layer breakability at the end of transfer and comprehensive evaluation:
A: Very good.
○: Good.
Δ: Slightly poor and may have practical problems.
X: Defect, practically problematic.
表１から、粘着剤層の先端の角の欠け部分のサイズ［Ａ/Ｂ×１００（％）］が、７０％未満になると、粘着剤層の面積が減少しすぎて接着力が低下し、９０％を越えると転写始めの粘着剤層転写性が悪く、ひどい場合には粘着剤層の転写抜けが発生する場合があった。８０％以上９５％以下であると接着力、転写始めの粘着剤層転写性および転写終わりの粘着剤層切れ性等、すべての特性が良好となる。 From Table 1, when the size [A / B × 100 (%)] of the corner portion at the tip of the pressure-sensitive adhesive layer is less than 70%, the area of the pressure-sensitive adhesive layer is excessively decreased, and the adhesive force is reduced. If it exceeds 90%, the transferability of the pressure-sensitive adhesive layer at the beginning of transfer is poor, and if it is severe, transfer loss of the pressure-sensitive adhesive layer may occur. When it is 80% or more and 95% or less, all the properties such as adhesive strength, transferability of the pressure-sensitive adhesive layer at the beginning of transfer, and cut-off property of the pressure-sensitive adhesive layer at the end of transfer are improved.
本発明の感圧転写テープは、基材上に粘着剤層を有する感圧転写テープであって、前記粘着剤層は粘着剤からなる複数の四角形状の粘着剤層が島模様状に前記基材に配置されており、前記複数の四角形状の粘着剤層の各辺が転写方向に対して４０〜５０度傾いており、かつ、前記四角形状の粘着剤層の転写方向の先端の角が欠けていることにより、基材に対する粘着剤層の占有面積が上げられ、十分な接着力を保持しつつ、転写終わりの良好な粘着剤切れ性を有し、かつ、転写始めの良好な粘着剤転写性も有する。 The pressure-sensitive transfer tape of the present invention is a pressure-sensitive transfer tape having a pressure-sensitive adhesive layer on a substrate, and the pressure-sensitive adhesive layer comprises a plurality of square-shaped pressure-sensitive adhesive layers made of pressure-sensitive adhesive in an island pattern. Each side of the plurality of square-shaped pressure-sensitive adhesive layers is inclined by 40 to 50 degrees with respect to the transfer direction, and the corner of the tip of the square-shaped pressure-sensitive adhesive layer in the transfer direction is Due to the lack, the area occupied by the pressure-sensitive adhesive layer with respect to the substrate is increased, while maintaining a sufficient adhesive force, it has a good pressure-sensitive adhesive property at the end of transfer, and a good pressure-sensitive adhesive at the beginning of transfer. Also has transferability.
Claims (2)
前記粘着剤層は、粘着剤からなる複数の四角形状の粘着剤層が島模様状に前記基材上に配置されており、
前記複数の四角形状の粘着剤層の各辺が転写方向に対して４０〜５０度傾いており、
前記四角形状の粘着剤層の転写方向の先端の角のみが欠けており、及び
転写方向に対して垂直な方向の前記四角形状の対角線を境にして、前記先端が欠けている角を有する三角形の面積（Ａ）と、前記先端が欠けている角を有しない他方の三角形の面積（Ｂ）との比（Ａ/Ｂ）が７０％以上９５％以下である、
ことを特徴とする感圧転写テープ。 A pressure-sensitive transfer tape having an adhesive layer on a substrate,
The pressure-sensitive adhesive layer has a plurality of square-shaped pressure-sensitive adhesive layers made of pressure-sensitive adhesive arranged on the base material in an island pattern,
Each side of the plurality of rectangular adhesive layers is inclined by 40 to 50 degrees with respect to the transfer direction ,
Only the corners of the transfer direction of the distal end of the previous SL rectangular adhesive layer is lacking, and
The area (A) of the triangle having the corner with the corner missing from the square diagonal line in the direction perpendicular to the transfer direction, and the other triangle without the corner with the corner missing. The ratio (A / B) to the area (B) is 70% or more and 95% or less.
This is a pressure-sensitive transfer tape.
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