JP4453945B2 - Transfer foil sheet and method for evaluating its peelability and breakability - Google Patents

Description

【００５６】
上記配合の樹脂組成物をメチルエチルケトン（ＭＥＫ）／トルエン：（５／５）で希釈して固形分を２０％に調製した。２５μｍのポリエチレンテレフタレートフィルム（ルミラーＴ６０：商品名、東レ社製）に５０ｍ／ｍｉｎの速度で剥離層（ハクリニス４５−３：商品名、昭和インク社製）をグラビアコートで塗工し、１００℃で乾燥して溶剤を揮散させた後、乾燥膜厚で１ｇ／ｍ² の剥離層／ＰＥＴの層構成からなるフィルムを得た。
【００５７】
前記の光硬化性樹脂組成物を剥離層／ＰＥＴの層構成からなるフィルムの剥離層上にロールコーターで塗工し、１１０℃で乾燥して溶剤を揮散させた後、乾燥膜厚で２ｇ／ｍ² の複製用感光性フィルムを得た。得られたフィルムはいずれも常温ではべとつかず、巻き取り状態で保管できるものであった。
【００５８】
複製装置のエンボスローラーには、レーザー光を用いて作ったマスターホログラムから引き続き作成したプレススタンパーが設置されている。尚、樹脂製版にマスターホログラムから複製ホログラムを作成し、これをシリンダー上に貼り付けたものも使用できる。上記で作成した複製用感光性フィルムを給紙側に仕掛け、１５０℃で加熱プレスして微細な凹凸パターンを形成させた。引き続き、水銀灯より発生した紫外線を照射して光硬化させた。引き続き真空蒸着法によりアルミニウム層をこの上に蒸着して反射型のレリーフホログラムを形成した。
【００５９】
この表面に、ＨＳ−３２マット（商品名、昭和インク工業社製）の感熱性接着剤をグラビアコートで塗工し、１００℃で乾燥して溶剤を揮散させた後、乾燥膜厚で３ｇ／ｍ² の感熱性接着剤層を形成した。
【００６０】
得られた転写箔シートの基材フィルム側から特定の金型で１３０℃で加熱、加圧して塩化ビニルカードに転写してみたところ、箔切れも良好に転写することができた。
【００６１】
〔実施例２〕
ホログラム形成層に体積型ホログラムを使用した場合の実施例
体積型ホログラム形成材料として、基本バインダーをガラス転移点が１００℃付近になるポリメチルメタクリレート系とした光硬化性樹脂組成物を用いた。
【００６２】
該体積型ホログラム形成用光硬化性樹脂組成物を、下記の溶剤と混合して、コーティング組成物とした。
・体積型ホログラム形成用光硬化性樹脂組成物 ６０重量部
・メチルエチルケトン（ＭＥＫ） ２５重量部
・トルエン １５重量部
【００６３】
上記コーティング組成物を、５０μｍのポリエチレンテレフタレートフィルム（Ｍｙｌｅｒ２０００（商品名）、デュポン社製）に乾燥後膜厚が３ｇ／ｍ² となるようにグラビアコートで塗工し、さらに塗工面に５０μｍのＰＥＴフィルムをラミネートして、体積型ホログラム形成用フィルムを作成した。
【００６４】
上記体積型ホログラム形成用フィルムの一方の側のＰＥＴフィルムを剥離し、予め用意された体積型ホログラム原版に、コーティングされた光硬化性樹脂組成物面をラミネートした。そこで、ホログラム形成用フィルム側から、波長が５１４ｎｍのアルゴンレーザー光を入射して体積型ホログラムを得た。
【００６５】
２５μｍのポリエチレンテレフタレートフィルム（ルミラーＴ６０（商品名）、東レ社製）に１０ｍ／ｍｉｎの速度で剥離層（ハクリニス４６−７（商品名）、昭和インク社製）をグラビアコートで塗工し、１００℃で乾燥して溶剤を揮散させた後、乾燥膜厚で１ｇ／ｍ² の剥離層／ＰＥＴの層構成からなるフィルムを得た。
【００６６】
この剥離層上に、上記で作成した体積型ホログラムを原版から剥離してラミネートし、ＰＥＴ／剥離層／体積型ホログラム層／ＰＥＴの構成を得、さらに加熱、紫外線照射で処理した。
【００６７】
上記構成より体積型ホログラム層に接しているＰＥＴを剥離し、該体積型ホログラム層上に感熱性接着剤（アクアテックスＥＣ−１２００（商品名）、中央理化工業社製）をグラビアコートで乾燥後膜厚が４ｇ／ｍ² となるように塗工し、ＰＥＴ／剥離層／体積型ホログラム層／感熱性接着剤層からなる、体積型ホログラム転写箔シートを得た。得られた転写箔シートの基材フィルム側から特定の金型で１３０℃で加熱、加圧して塩化ビニルカードに転写してみたところ、箔切れも良好に転写することができた。
【００６８】
〔比較例１〕
前記実施例１において、表面レリーフ型ホログラム形成材料のうち、ポリエステルアクリレートをウレタンアクリレート（商品名：３０００Ｂ、日本合成社製）とした以外は変更せずに実施した。ここで調製した転写箔シートの２０℃〜２５℃雰囲気における破断強度は２．３×１０⁷ 〔Ｐａ〕、剥離強度は２×１０⁵ 〔Ｐａ〕であった。得られた転写箔シートの基材フィルム側から特定の金型で１３０℃で加熱、加圧して塩化ビニルカードに転写してみたところ、バリが発生してうまく被転写体に転写することができなかった。
【００６９】
〔比較例２〕
前記実施例２において、体積型ホログラム形成材料にガラス転移点が４０℃付近であるポリ酢酸ビニル系を使用した以外は変更せずに実施した。ここで調製した体積型ホログラム形成材料の２０℃〜２５℃雰囲気における破断強度は１．５×１０⁷ 〔Ｐａ〕、剥離強度は４．６×１０⁴ 〔Ｐａ〕であった。得られた転写箔シートの基材フィルム側から特定の金型で１３０℃で加熱、加圧して塩化ビニルカードに転写してみたところ、転写工程時にはバリが発生してうまく被転写体に転写することができなかった。
【００７０】
〔実施例１、２、比較例１、２の転写箔シートの性能評価〕
以上の実施例１、２、比較例１、２で得られた転写箔シートの剥離性、耐薬品性、耐擦過性、蒸着適性、耐屈曲性についての評価結果を下記の表１に示す。なお、物性の評価法は次の通りである。
【００７１】
剥離性（プレススタンパーからの剥離性）：図８に示すホログラム複製装置を用い、ホログラム原版４０を表面に形成したエンボスローラー３１と押えつけローラー３２で基材フィルム２上に塗工された樹脂層２０を押圧して、樹脂層２０表面に凹凸を形成し、１０００ｍ連続複製を行い、プレススタンパー上に樹脂の残りがないかを確認することにより行った。
○・・・残りがない。×・・・残りがある。
【００７２】
耐薬品性：加工部の硬化表面をメチルエチルケトンをしみ込ませたガーゼで１００回往復させて擦ったとき、表面に異常がなかったものを良好とし、表面に異常を生じたものを不良とした。
○・・・良好。×・・・不良。
【００７３】
耐熱性：加工品の硬化表面を熱ロールで２００℃に加熱し、３分間保持した後の変色や変形等を見た。異常のなかったものを良好とし、黄変若しくは変形や剥離を生じたものを不良とした。
○・・・良好。×・・・不良。
【００７４】
耐擦傷性：＃００００のスチールウールで加工品の硬化表面を１０回擦ったとき、表面に何の変化もなかったものを良好とし、表面が傷つき、白化したものを不良とした。
○・・・良好。×・・・不良。
【００７５】
蒸着適正：ホログラム又は回析格子形成面に、真空蒸着法によりアルミニウム層を蒸着した後、密着性をセロテープ基盤目試験で評価した。
○・・・蒸着性良好。×・・・蒸着性不良。
【００７６】
転写箔シート適正：ホログラム又は回析格子形成面に、真空蒸着法によりアルミニウム層を蒸着した後、更にヒートシール用のアクリル系接着剤（ホットスタンプ剤）を塗工して得たものを、転写機を用いてポリ塩化ビニルカード上へ転写し、転写箔シートの箔切れ性及び密着性を評価した。
○・・・良好。×・・・不良。
【００７７】
耐屈曲性：ポリ塩化ビニルカード上へ転写した転写箔にエンボス文字加工をして、エンボス文字に割れ等が生じていないかを確認した。
○・・・変化なし。×・・・割れがある。
【００７８】
【表１】

【００７９】
〔実施例１、２、比較例１、２の転写箔シートの剥離性及び破断性の評価〕
合板の上に前記実施例１、２、比較例１、２の転写箔シートの接着剤面を被転写体に、１３０℃にてラミパッカーＬＢＰ３３０１（商品名、日本オフィスラミネーター製）を用いて、１ｍ／ｍｉｎの速度にて転写箔シートと被転写体をラミネートした。次いで、２０℃〜２５℃雰囲気において、転写箔シートをＪＩＳ Ｋ６８５４の手法により１８０°方向に剥離することにより、該特定部位における境界の破断強度と、基材フィルムと剥離層間の剥離強度を測定した。
【００８０】
図９に実施例１、２の転写箔シートの剥離試験の結果を、横軸に伸び（ｍｍ）、縦軸に強度〔Ｐａ〕を採ったグラフに示す。図９のグラフにおいて、実施例１は▲及び▼で示す曲線であり、３回の測定データを示し、実施例２は●及び×で示す曲線であり、２回の測定データを示す。
【００８１】
実施例１、２の転写箔シートの破断強度と、それらの基材フィルムと剥離層間の剥離強度を表２に示す。破断強度はグラフにおけるピーク値、剥離強度はピーク後に飽和した値としている。実施例１、２のそれぞれの値は、測定データの各平均値を表す。
【００８２】
図１０に比較例１、２の転写箔シートのＪＩＳ Ｋ６８５４の手法により１８０°方向に剥離した剥離試験の結果を、横軸に伸び（ｍｍ）、縦軸に強度〔Ｐａ〕を採ったグラフに示す。比較例１、２の転写箔シートの破断強度及び剥離強度を表２に示す。
【００８３】
【表２】

【００８４】
表２によれば、本実施例１〜２の転写箔シートについて、ＪＩＳ Ｋ６８５４の手法を用いて測定した２０℃〜２５℃雰囲気における、破断強度が４×１０⁵ Ｐａ以上１×１０⁶ Ｐａ以下、且つ、剥離強度が１×１０⁵ Ｐａ以上６．５×１０⁵ Ｐａ以下であることが分かる。
【００８５】
【発明の効果】
本発明に規定の破断強度及び剥離強度を有する転写箔シートによれば、転写時に転写層の安定した箔切れ性と、基材フィルムの剥離層からの剥離性を発揮することができるため、転写箔シートにおける転写層の転写を確実に行うことができ、被転写体への転写の生産性を高めることができる。
【００８６】
本発明の転写箔シートの剥離性及び破断性の評価方法によれば、一つの簡易的な試験により、転写時に転写層の箔切れ性と、基材フィルムの剥離性の２つの評価を同時に行うことができる。
【図面の簡単な説明】
【図１】被転写体に対してホットスタンプ等により熱圧着処理し、次いでホログラム転写箔シートを剥離して転写されたホログラムを得る様子を示すフロー図である。
【図２】ホログラム転写箔シートの剥離時の斜視図である。
【図３】本発明のホログラム転写箔シートの基本形態を示す断面図である。
【図４】本発明のホログラム転写箔シートの別の基本形態を示す断面図である。
【図５】引張強度を測定することができるインストロン社製の万能材料試験機（商品名）の把持部付近の概略図である。
【図６】本発明の転写箔シートの引張強度と伸びの関係を示すグラフ。
【図７】本発明のホログラム転写箔シートを用いた転写例を示す説明図である
【図８】ホログラム複製装置を示す図である。
【図９】実施例１、２の転写箔シートの剥離試験の結果を、横軸に伸び（ｍｍ）、縦軸に強度〔Ｐａ〕を採ったグラフを示す。
【図１０】比較例１、２の転写箔シートの剥離試験の結果を、横軸に伸び（ｍｍ）、縦軸に強度〔Ｐａ〕を採ったグラフを示す。
【符号の説明】
１ ホログラム転写箔シート
２ 基材フィルム
３ 転写層
４ 剥離層
５ ホログラム形成層
６ 反射層
７ 感熱性接着剤層
８ ホットスタンプ
９ 加圧板
１０ 被転写体
１１ 試験片
１２ つまみ
２０ 樹脂層
３１ エンボスローラー
３２ 押えつけローラー
４０ ホログラム原版[0001]
BACKGROUND OF THE INVENTION
In the present invention, a transfer layer, preferably a hologram, can be easily imparted to various transferred materials by transfer. Specifically, the foil of the transfer layer is peelable, and the transfer layer is peelable from the substrate film. The present invention relates to a transfer foil sheet that is good, and further relates to a method for evaluating the peelability and breakability of the transfer layer of the transfer foil sheet.
[0002]
[Prior art]
Examples of transfer onto a transfer medium using a hologram transfer foil sheet include a credit card, a cash card, a cash voucher, etc., to which a light diffraction structure such as a hologram or a diffraction grating is transferred.
[0003]
Conventionally, as a hologram transfer foil sheet, a peeling layer and a hologram forming layer are formed on a base film, and various uneven patterns are mainly given, and then a layer with different metal deposition or refractive index is formed on the formed uneven pattern surface. A laminated foil and a transfer foil sheet having a diffraction grating function and having a heat-sensitive adhesive layer formed thereon are widely known. The hologram transfer sheet formed in this way is thermally transferred to the transfer object by hot stamping or the like.
[0004]
FIG. 1 is a flowchart showing a state in which a transferred hologram is heat-treated with a hot stamp 8 or the like, and then the hologram transfer foil sheet 1 is peeled off to obtain a transferred hologram. FIG. 2 is a hologram transfer foil. 2 is a perspective view when the sheet 1 is peeled off. FIG. The hologram transfer foil sheet 1 at the part that has been heated by the hot stamp 8 cuts the transfer layer 3 along the boundary of the transfer pattern by the mold of the hot stamp 8 at the time of peeling, and the base film 2 from the transfer layer 3. Is peeled off at the same time.
[0005]
[Problems to be solved by the invention]
The hologram transfer foil sheet 1 is peeled off after its thermal transfer, for example, hot stamping. At this time, the foil cutting property of the transfer layer 3 of the hologram transfer foil sheet 1 at the boundary between the hot stamp portion and the other portion is not obtained. The transfer layer 3 from the base material sheet 2 of the hologram transfer foil sheet 1 is also excellent, and the hologram as the transfer layer 3 must be reliably transferred to the transfer target 10. is there.
[0006]
However, the conventional hologram transfer foil sheet 1 may be cut or not cut well at the time of transfer / peeling, and the foil cutability and peelability are insufficient, and there are many unstable ones, so improvement is desired. .
[0007]
Therefore, the present invention provides a good range of breaking strength indicating the tearability of the transfer layer of the transfer foil sheet, and the peel strength of the transfer layer from the base sheet of the hologram transfer foil sheet during transfer, which has not been clarified so far. The hologram transfer foil sheet satisfying the transfer conditions capable of performing stable transfer in the transfer process by solving the above-mentioned problems clearly, and peelability of various transfer sheets -It aims at providing the evaluation method of breakability.
[0008]
[Means for Solving the Problems]
As a result of intensive studies to achieve the above object, the present invention has found that the breakability of the transfer layer of the transfer foil sheet is affected by the breaking strength of the transfer foil sheet. It was also found that transfer suitability is affected by the peel strength of the transfer layer from the base film and contributes to the productivity of the transfer body. The present invention has been completed based on these findings.
[0009]
  That is, the method for evaluating the peelability and breakability of the transfer foil sheet of the present invention that solves the above-described problems is a transfer foil in which at least a release layer and a heat-sensitive adhesive layer are formed as a transfer layer on a base film. The thermocompression bonding side of the sheet is overlaid on the transfer target, and the transfer foil sheet is thermocompression bonded at a temperature at which the heat-sensitive adhesive is thermally fused.KBy measuring the change in peel strength by the method 6854, it is possible to easily obtain the break strength at the boundary of the thermocompression bonding portion and the peel strength between the base film and the transfer layer. The peeling direction can be an angle smaller than 180 °, and in that case, the peeling strength is a value correlated with the angle in the peeling direction.
[0010]
  In the transfer foil sheet of the present invention, at least a release layer and a heat-sensitive adhesive layer are formed as a transfer layer on a base film,The breaking strength between the substrate film and the transfer layer in the transfer laminate when the transfer layer side of the transfer foil sheet is laminated and heat-bonded to the transfer target at a temperature at which heat transfer is performed is 4 × 10 ^Five Pa or more 1 × 10 ⁶ The peel strength in an atmosphere of Pa or lower and 20 ° C. to 25 ° C. is 1 × 10 ^Five Pa or more 6.5 × 10 ^Five Pa or less, and the peel strength is measured based on JIS K6854It is characterized by being.
[0011]
  As an aspect of the transfer foil sheet of the present invention, in the transfer foil sheet in which at least a release layer, a hologram forming layer and a heat-sensitive adhesive layer are formed as a transfer layer on a base film,The breaking strength between the substrate film and the transfer layer in the transfer laminate when the transfer layer side of the transfer foil sheet is laminated and heat-bonded to the transfer target at a temperature at which heat transfer is performed is 4 × 10 ^Five Pa or more 1 × 10 ⁶ The peel strength in an atmosphere of Pa or lower and 20 ° C. to 25 ° C. is 1 × 10 ^Five Pa or more 6.5 × 10 ^Five Pa or less, and the peel strength is measured based on JIS K6854It is characterized by being.
[0012]
In the transfer foil sheet of the present invention, the measured values of breaking strength and peel strength in an atmosphere of 20 ° C. to 25 ° C. are assumed to be measured at room temperature.
[0013]
In the transfer foil sheet of the present invention, the breaking strength at 20 ° C. to 25 ° C. is 4 × 10^FiveIf it is less than Pa, the transfer layer becomes brittle, causing burrs, and there is an inconvenience that transfer cannot be performed successfully. The breaking strength is 1 × 10⁶When Pa is exceeded, there is an inconvenience that the transfer cannot be performed properly as intended, and therefore transfer cannot be performed.
[0014]
In the transfer foil sheet of the present invention, the peel strength in an atmosphere of 20 ° C. to 25 ° C. is 1 × 10^FiveIf it is less than Pa, there is a problem that the substrate film may float from the transfer layer, and the peel strength is 6.5 × 10.^FiveIf it exceeds Pa, there is a problem that when the base film is peeled off after transfer, there is a problem that the layer to be transferred is brought to the base film side.
[0015]
The transfer foil sheet of the present invention is a transfer foil sheet in which at least a release layer and a heat-sensitive adhesive layer are formed as a transfer layer on a base film, or at least a release layer and a hologram are formed as a transfer layer on a base film. It is the transfer foil sheet (hologram transfer foil sheet) in which the layer and the heat-sensitive adhesive layer are formed.
[0016]
In the hologram transfer foil sheet, the hologram forming layer may be a surface relief hologram having irregularities formed on the surface thereof. A reflective metal thin film layer may be formed between the hologram forming layer and the heat-sensitive adhesive layer. In the hologram transfer foil sheet of the present invention, the hologram forming layer may be a volume hologram in which a hologram is formed by recording interference fringes in the forming material. The hologram forming layer may be a hologram forming layer using a light selective wavelength layer, for example, a layer also serving as a liquid crystal layer.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0018]
  Measuring method of breaking strength and peel strength
  The rupture strength at the boundary of the thermocompression bonding part and the peel strength between the base film and the transfer layer when the transfer foil sheet is thermocompression bonded to a specific part of the transfer target are determined according to JIS.KBy measuring the change in peel strength using the method 6854, it can be determined as follows.
[0019]
The transfer foil sheet is a test piece of 30 ± 2 mm × 175 mm. A transferred object having the same shape as the test piece is prepared, and is bonded to the transferred object in a region from one end of the test piece to 125 mm. The pressure bonding is performed at 130 ° C. and 1 m / min using a Lami Packer LBP3301 (trade name, manufactured by Japan Office Laminator). FIG. 5 is a schematic view of the vicinity of the grip portion of a universal material testing machine (trade name) manufactured by Instron that can measure tensile strength. The end of the non-crimped part of the test piece 11 and the end of the non-crimped part of the transferred body 10 are fixed to the knobs 12 and 12 of the universal material testing machine (trade name). Then, the measurement mode is set to film tension, and the film is peeled in the longitudinal direction of the pressure-bonded body, that is, in the 180 ° direction at a tension speed of 100 mm / min in an atmosphere of 20 ° C. to 25 ° C.
[0020]
  The relationship between the tensile strength and the elongation at this time is a pattern like the graph shown in FIG. In FIG. 6, A is a peak value, which corresponds to the breaking strength when the boundary between the crimping part and the non-crimping part in the transfer layer breaks. B is a saturation value after the peak, and corresponds to the peel strength when the base sheet starts to peel from the transfer layer. Therefore, JISKThe breaking strength and peel strength can be easily obtained from the graph of tensile strength measured by the method 6854.
[0021]
The peeling direction can be peeled even if the angle is smaller than 180 °, and in this case, the obtained breaking strength and peeling strength are values correlated in accordance with the angle in the peeling direction.
[0022]
Layer structure of hologram transfer foil sheet
FIG. 3 is a cross-sectional view showing the basic form of the hologram transfer foil sheet of the present invention. The hologram transfer foil sheet 1 of the present invention shown in FIG. 3 is obtained by sequentially laminating a release layer 4, a hologram forming layer 5, and a heat-sensitive adhesive layer 7 as a layer constituting a transfer layer 3 on a base film 2. It is. By providing the release layer 4 between the base film 2 and the hologram forming layer 5, the effect of increasing the peelability of the transfer layer 3 and the base film 2 during thermal transfer can be obtained. Further, when the adhesion between the release layer 4 and the hologram forming layer 5 is weak, a layer for improving adhesion may be provided.
[0023]
When the hologram forming layer 5 is a surface relief hologram layer, it is preferable to provide a reflective layer 6 between the hologram forming layer 5 and the heat-sensitive adhesive layer 7 as shown in FIG.
[0024]
Base film
The base film of the hologram transfer foil sheet may be any film having transferability and releasability. For example, a biaxially stretched polyethylene terephthalate (PET) film has dimensional stability, heat resistance, toughness, etc. To most preferred. Besides this, polyvinyl chloride (PVC) film, polyvinylidene chloride film, polyethersulfone film, polyetherketone (PEEK) film, polymethylmethacrylate (PMMA) film, polypropylene film, polyethylene film, polycarbonate film, cellophane film, Polyvinyl alcohol film, acetate film, nylon film, polyamide film, ethylene / vinyl alcohol copolymer film, fluorine-containing film, various coextruded films, and the like can be used. The thickness is 5 μm to 200 μm, preferably 10 μm to 50 μm.
[0025]
Release layer
As the release layer of the hologram transfer foil sheet, for example, one or two of polymethacrylic ester resin, polyvinyl chloride resin, cellulose resin, silicone resin, chlorinated rubber, casein, various surfactants, metal oxides, etc. A mixture of seeds or more is used. In particular, the release layer has a peel strength between the base film and the transfer layer, and a peel strength at 20 ° C. to 25 ° C. of 1 × 10.^FivePa or more 6.5 × 10^FiveIt is preferable to form the material by appropriately selecting the material so that the peel strength is in the range of Pa or less. This release layer can be converted into an ink and formed on the surface of the substrate film by a known method such as coating, and the thickness is preferably in the range of 0.1 to 2 μm in view of the release force, foil breakage, and the like.
[0026]
Hologram forming layer
There are three types of hologram forming layers of the hologram transfer foil sheet: surface relief type, volume type, and those using a light selective wavelength layer.
[0027]
1) Surface relief type hologram forming layer
Among the hologram forming layers, various resin materials such as a thermosetting resin, a thermoplastic resin, and an ionizing radiation curable resin can be selected as the surface relief type hologram forming material, and the following are exemplified. Examples of the thermosetting resin include unsaturated polyester resins, acrylic urethane resins, epoxy-modified acrylic resins, epoxy-modified unsaturated polyester resins, alkyd resins, and phenol resins. Examples of the thermoplastic resin include acrylate resin, acrylamide resin, nitrocellulose resin, and polystyrene resin.
[0028]
These resins are used alone or as a copolymer of two or more. These resins may be used alone or as a mixture of two or more kinds of isocyanate resins, metal soaps such as cobalt naphthenate and zinc naphthenate, benzoyl peroxide, methyl ethyl ketone peroxide, benzophenone, acetophenone, anthraquinone, and naphthoquinone. Further, a heat or ultraviolet curing agent such as azobisisobutyronitrile or diphenyl sulfide may be blended.
[0029]
Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, and acrylic-modified polyester. Here, as an ionizing radiation curable resin, a production example of a urethane-modified acrylic resin useful as a relief hologram forming material will be shown.
[0030]
The ionizing radiation curable resin as described above can contain other monofunctional or polyfunctional monomers, oligomers, and the like as described below for the purpose of adjusting the cross-linked structure and viscosity.
[0031]
For example, monofunctional (mono) methacrylate such as tetrahydrofurfuryl (meth) acrylate, hydroxyethyl (meth) acrylate, vinylpyrrolidone, (meth) acryloyloxyethyl succinate, (meth) acryloyloxyethyl phthalate, etc. In skeleton structure, polyol (meth) acrylate (epoxy-modified polyol (meth) acrylate, lactone-modified polyol (meth) acrylate, etc.), polyester (meth) acrylate, epoxy (meth) acrylate, urethane (meth) acrylate, etc. Poly (meth) acrylates with polybutadiene-based, isocyanuric acid-based, hydantoin-based, melamine-based, phosphoric acid-based, imide-based, phosphazene-based skeletons, UV and electron beam curable There various monomers, oligomers, polymers may be utilized.
[0032]
More specifically, bifunctional monomers and oligomers include polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, etc. Trifunctional monomers, oligomers, polymers include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, aliphatic tri (meth) acrylate, etc. Tetrafunctional monomers, oligomers include pentaerythritol tetra (meth) ) Acrylate, ditrimethylolpropane tetra (meth) acrylate, aliphatic tetra (meth) acrylate and the like. Data (meth) acrylate, other such dipentaerythritol hexa (meth) acrylate, polyester skeleton, a urethane skeleton, having a phosphazene skeleton (meth) acrylate. The number of functional groups is not particularly limited, but if the number of functional groups is smaller than 3, the heat resistance tends to decrease, and if it is 20 or more, the flexibility tends to decrease. preferable.
[0033]
Furthermore, when forming a surface relief hologram, a press tamper with irregularities formed on the surface thereof is pressed against the forming material to form irregularities on the surface of the forming material. A mold release agent may be included in advance so that it can be easily peeled off from the press tamper. As the release agent to be used, conventionally known release agents such as solid waxes such as polyethylene wax, amide wax and Teflon powder, fluorine-based and phosphate ester-based surfactants, silicone and the like can be used. . Particularly preferable release agent is modified silicone, specifically, modified silicone oil side chain type, modified silicone oil both end type, modified silicone oil one end type, modified silicone oil side chain both end type, trimethylsiloxysilicate. And polymethylsiloxane (referred to as silicone resin), silicone graft acrylic resin, and methylphenyl silicone oil.
[0034]
Modified silicone oils are divided into reactive silicone oils and non-reactive silicone oils. Examples of the reactive silicone oil include amino modification, epoxy modification, carboxyl group modification, carbinol modification, methacryl modification, mercapto modification, phenol modification, one-end reactivity, and different functional group modification. Examples of the non-reactive silicone oil include polyether modification, methylstyryl modification, alkyl modification, higher fatty ester modification, hydrophilic special modification, higher alkoxy modification, higher fatty acid modification, and fluorine modification.
[0035]
Among the above silicone oils, reactive silicone oils of a type having a group that is reactive with the film-forming component reacts and bonds to the resin as the resin layer is cured, so that the surface of the resin layer on which a concavo-convex pattern is formed later Therefore, characteristic performance can be imparted without bleeding out. In particular, it is effective for improving the adhesion with the vapor deposition layer in the vapor deposition step.
[0036]
2) Volume hologram forming layer
Among the hologram forming layers, examples of the volume hologram forming material include known volume hologram recording materials such as silver salt materials, dichromated gelatin emulsions, photopolymerizable resins, and photocrosslinkable resins, and in particular, dry volume phase. And a photosensitive material for use in type hologram recording, and includes a matrix polymer, a photopolymerizable compound, a photopolymerization initiator, and a sensitizing dye.
[0037]
Examples of the photopolymerizable compound include photopolymerization having at least one ethylenically unsaturated bond in one molecule as described later, photocrosslinkable monomers, oligomers, prepolymers, and mixtures thereof. Examples thereof include unsaturated carboxylic acids and salts thereof, esters of unsaturated carboxylic acids and aliphatic polyhydric alcohol compounds, and amide bonds of unsaturated carboxylic acids and aliphatic polyvalent amine compounds.
[0038]
Specific examples of the unsaturated carboxylic acid include acrylic acid, methacrylic acid, itaconic acid, maleic acid, and halogen-substituted unsaturated carboxylic acids such as brominated unsaturated carboxylic acid. And sodium salts and potassium salts of the aforementioned acids.
[0039]
Specific examples of esters of aliphatic polyhydric alcohol compounds and unsaturated carboxylic acids include tetraethylene glycol diacrylate, trimethylolpropane triacrylate, acrylic esters such as pentaerythritol tetraacrylate, tetraethylene glycol dimethacrylate, Examples thereof include methacrylic acid esters such as trimethylolpropane trimethacrylate and pentaerythritol tetramethacrylate, and other itaconic acid ester-based and maleic acid ester-based compounds.
[0040]
Examples of the halogenated unsaturated carboxylic acid include 2,2,3,3-tetrafluoropropyl acrylate, 1H, 1H, 2H, 2H-heptadecafluorodecyl acrylate, dibromopropyl acrylate, methacrylic acid chloride, tribromophenol acrylate, and the like. Illustrated.
[0041]
Specific examples of the amide compound of an unsaturated carboxylic acid and an aliphatic polyvalent amine compound include methylene bisacrylamide, methylene bismethacrylamide, 1,6-hexamethylene bisacrylamide and the like.
[0042]
Plasticizers added as necessary include polyhydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, glycerin, dimethyl phthalate, dibutyl phthalate, di-2-ethylhexyl phthalate, di-n-phthalate -Phthalic acid esters such as octyl, aliphatic dibasic acid esters such as dimethylcyclohexyl adipate, isodecyl adipate, dibutyl sebacate, and citrate esters such as (acetyl) triethyl citrate, (acetyl) tributyl citrate And phosphoric acid esters such as tributyl phosphate and triphenyl phosphate.
[0043]
As photopolymerization initiators in the initiator system, 1,3-di (t-butyldioxycarbonyl) benzophenone, 3,3 ′, 4,4′-tetrakis (t-butyldioxycarbonyl) benzophenone, 2,4 , 6-tris (trichloromethyl) -s-triazine, 2-mercaptobenzimidazole, imidazole dimers and the like.
[0044]
Examples of the sensitizing dye include thiopyrylium salts, merocyanines, quinolines, ketocoumarins, thioxanthenes, cyanines, rhodamines, diphenyliodonium salts and the like.
[0045]
Examples of matrix polymers include polymethacrylates or partial hydrolysates thereof, polyvinyl acetate or hydrolysates thereof, polyvinyl alcohol or partial acetal compounds thereof, triacetyl cellulose, polyvinyl butyral, polyvinyl chloride, and poly-N-vinylcarbazole. Or a derivative thereof, poly-N-vinylpyrrolidone or a derivative thereof, a copolymer of styrene and maleic anhydride, acrylic acid, acrylic acid ester, methacrylic acid, methacrylic acid ester, acrylamide, acrylonitrile, vinyl acetate and the like can be copolymerized. A copolymer having at least one monomer group as a polymerization component or a mixture thereof is used.
[0046]
The photopolymerizable compound is used in a ratio of 10 to 1000 parts by weight, preferably 10 to 100 parts by weight, based on 100 parts by weight of the binder resin. A photoinitiator is used in the ratio of 1-10 weight part with respect to 100 weight part of binder resin, Preferably it is 5-10 weight part. The sensitizing dye is used in a proportion of 0.01 to 1 part by weight, preferably 0.01 to 0.5 part by weight, based on 100 parts by weight of the binder resin.
[0047]
These hologram recording materials use acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, benzene, toluene, xylene, methyl cellosolve, ethyl cellosolve, ethyl acetate, chloroform, methanol, ethanol, isopropanol, or a mixed solvent thereof. A coating solution.
[0048]
Reflective layer
When a metal thin film that reflects light is used as the reflection layer of the hologram transfer foil sheet, it becomes an opaque type hologram, and if it is a transparent substance and has a refractive index difference from the hologram layer, it becomes a transparent type, but both can be used in the present invention. . The reflective layer can be formed by a known method such as sublimation, vacuum deposition, sputtering, reactive sputtering, ion plating, or electroplating.
[0049]
For example, Cr, Ti, Fe, Co, Ni, Cu, Ag, Au, Ge, Al, Mg, Sb, Pb, Pd, Cd, Bi, Sn, Se, It is a thin film formed by using a metal such as In, Ga, Rb and the like, an oxide, a nitride, or the like alone or in combination of two or more. Among the metal thin films, Al, Cr, Ni, Ag, Au and the like are particularly preferable, and the film thickness is in the range of 1 to 10,000 nm, desirably 20 to 200 nm.
[0050]
As the thin film forming the transparent type hologram, any material can be used as long as it is light transmissive so as to exhibit the hologram effect. For example, there is a transparent material having a refractive index different from that of the resin of the hologram forming layer (photocuring resin layer). The refractive index in this case may be larger or smaller than the refractive index of the resin of the hologram forming layer, but the difference in refractive index is preferably 0.1 or more, more preferably 0.5 or more, and 1.0 The above is optimal. In addition to the above, there is a metallic reflective film of 20 nm or less. As a transparent type reflective layer preferably used, titanium oxide (TiO 2) is used.₂), Zinc sulfide (ZnS), Cu • Al composite metal oxide, and the like.
[0051]
Heat sensitive adhesive layer
As the heat-sensitive adhesive layer of the hologram transfer foil sheet, a known heat-sensitive adhesive resin can be used. For example, rubber systems such as polyisoprene rubber, polyisobutylene rubber, styrene butadiene rubber, poly (meth) methyl acrylate, poly (meth) ethyl acrylate, poly (meth) acrylate, poly (meth) acrylate, Poly (meth) acrylates such as 2-ethylhexyl poly (meth) acrylate, polyvinyl ethers such as polyisobutyl ether, polyvinyl chlorides such as polyvinyl acetate and vinyl chloride-vinyl acetate copolymers, polyacrylamide, poly Polyamides such as methylolacrylamide, vinyl chlorides such as polyvinyl chloride, polystyrene, polyester, polychlorinated olefin, polyvinyl butyral, and others, vinyl acetate / octyl acrylate, vinyl acetate / butyl acrylate, vinyl acetate / ethylene, chloride Examples include thermoplastic resins such as nylidene / butyl acrylate, polyethylene resin, ethylene / isobutyl acrylate, butyral resin, cellulose resin, polyurethane resin, polycarbonate resin, polypropylene resin, epoxy resin, phenol resin, SBS, SIS, SEBS, SEPS. It is done.
[0052]
Hologram transfer example
FIG. 7 is an explanatory view showing an example of transfer using the hologram transfer foil sheet of the present invention. As shown in FIG. 7, the hologram transfer foil sheet 1 of the present invention is superposed on the surface of the transfer object 10 to which the hologram is to be applied so that the heat-sensitive adhesive layer of the transfer foil sheet 1 is in contact with it, and the hologram is applied. When the portion of the transfer foil sheet 1 (the base film 2 side) is heated and pressed with the pressure plate 9, the heat-sensitive adhesive layer of the desired portion is melted and bonded, and then the transfer foil sheet 1 is peeled off. Only the desired portion of the transfer layer is transferred, and a hologram can be applied to the surface of the transfer target 10.
[0053]
【Example】
Example of resin solution production
A 2-liter four-necked flask equipped with a condenser, a dropping funnel and a thermometer was charged with 40 g of toluene and 40 g of methyl ethyl ketone (MEK: abbreviation) together with an azo-based initiator, and 2-hydroxyethyl methacrylate (HEMA: abbreviation) 22. 4 g, a mixture of methyl methacrylate (MMA: abbreviation) 70.0 g, toluene 20 g, and MEK 20 g was allowed to react at a temperature of 100 to 110 ° C. for 8 hours while dropping over about 2 hours through a dropping funnel. Cooled to room temperature.
[0054]
A mixed liquid of 27.8 g of 2-isocyanatoethyl methacrylate (manufactured by Showa Denko, Karenz MOI: trade name), 20 g of toluene and 20 g of MEK was added thereto, and an addition reaction was performed using dibutyltin laurate as a catalyst. 2200 cm by IR analysis of the reaction product^-1The disappearance of the absorption peak was confirmed and the reaction was terminated. The obtained resin solution had a solid content of 41.0%, a viscosity of 130 mPa (30 ° C.), a molecular weight of 60000 in terms of polystyrene, and a C═C bond introduction amount of 13.8 mol%.
[0055]
[Example 1]
Example of using surface relief hologram for hologram forming layer
The following photocurable resin composition was prepared using the resin solution obtained in the above production example, and used as a surface relief hologram forming material.

[0056]
The resin composition having the above composition was diluted with methyl ethyl ketone (MEK) / toluene: (5/5) to prepare a solid content of 20%. A 25 μm polyethylene terephthalate film (Lumirror T60: trade name, manufactured by Toray Industries, Inc.) was coated with a release layer (Haklinis 45-3: trade name, manufactured by Showa Ink) with a gravure coat at a rate of 50 m / min. After drying to evaporate the solvent, the dry film thickness is 1 g / m²A film having a layer structure of release layer / PET was obtained.
[0057]
The photocurable resin composition is applied onto a release layer of a film having a release layer / PET layer structure with a roll coater, dried at 110 ° C. to evaporate the solvent, and then dried at a film thickness of 2 g / m²A photosensitive film for duplication was obtained. None of the obtained films were sticky at room temperature and could be stored in a wound state.
[0058]
On the embossing roller of the duplicating apparatus, a press stamper continuously created from a master hologram made using laser light is installed. It is also possible to use a replica hologram made from a master hologram on a resin plate and pasted on a cylinder. The above-prepared photosensitive film for duplication was placed on the paper feeding side and heated and pressed at 150 ° C. to form a fine uneven pattern. Subsequently, it was cured by irradiating with ultraviolet rays generated from a mercury lamp. Subsequently, an aluminum layer was vapor-deposited thereon by a vacuum vapor deposition method to form a reflective relief hologram.
[0059]
A heat-sensitive adhesive of HS-32 mat (trade name, manufactured by Showa Ink Industries Co., Ltd.) was applied to this surface with a gravure coat, dried at 100 ° C. to evaporate the solvent, and then dried at a film thickness of 3 g / m²A heat-sensitive adhesive layer was formed.
[0060]
When the obtained transfer foil sheet was transferred to a vinyl chloride card by heating and pressurizing at 130 ° C. with a specific mold from the base film side, the foil breakage could be transferred well.
[0061]
[Example 2]
Example of using volume hologram for hologram forming layer
As a volume hologram forming material, a photocurable resin composition in which a basic binder is a polymethylmethacrylate based glass transition point of around 100 ° C. was used.
[0062]
The volume hologram forming photocurable resin composition was mixed with the following solvent to obtain a coating composition.
・ 60 parts by weight of photocurable resin composition for volume hologram formation
・ Methyl ethyl ketone (MEK) 25 parts by weight
・ Toluene 15 parts by weight
[0063]
  the aboveCoating compositionAfter drying on a 50 μm polyethylene terephthalate film (Myler2000 (trade name), manufactured by DuPont), the film thickness is 3 g / m.²Then, a gravure coat was applied so that a 50 μm PET film was laminated on the coated surface to prepare a volume hologram-forming film.
[0064]
The PET film on one side of the volume hologram forming film was peeled off, and the coated photocurable resin composition surface was laminated on a volume hologram master prepared in advance. Therefore, an argon laser beam having a wavelength of 514 nm was incident from the hologram forming film side to obtain a volume hologram.
[0065]
A 25 μm polyethylene terephthalate film (Lumirror T60 (trade name), manufactured by Toray Industries, Inc.) was coated with a gravure coat with a release layer (Haklinis 46-7 (trade name), manufactured by Showa Ink) at a speed of 10 m / min. After drying at 0 ° C. to evaporate the solvent, the dry film thickness is 1 g / m.²A film having a layer structure of release layer / PET was obtained.
[0066]
On the release layer, the volume hologram prepared above was peeled off from the original and laminated to obtain a configuration of PET / release layer / volume hologram layer / PET, and further processed by heating and ultraviolet irradiation.
[0067]
After the PET in contact with the volume hologram layer is peeled off from the above configuration, a heat-sensitive adhesive (Aquatex EC-1200 (trade name), manufactured by Chuo Rika Kogyo Co., Ltd.) is dried on the volume hologram layer with a gravure coat. Film thickness is 4g / m²Thus, a volume hologram transfer foil sheet composed of PET / peeling layer / volume hologram layer / heat-sensitive adhesive layer was obtained. When the obtained transfer foil sheet was transferred to a vinyl chloride card by heating and pressurizing at 130 ° C. with a specific mold from the base film side, the foil breakage could be transferred well.
[0068]
[Comparative Example 1]
In Example 1, the surface relief hologram forming material was used without change except that the polyester acrylate was urethane acrylate (trade name: 3000B, manufactured by Nihon Gosei Co., Ltd.). The transfer foil sheet prepared here had a breaking strength in the atmosphere of 20 ° C. to 25 ° C. of 2.3 × 10⁷[Pa], peel strength is 2 × 10^Five[Pa]. When the transfer foil sheet was transferred to a vinyl chloride card by heating and pressurizing at 130 ° C with a specific mold from the base film side of the transfer foil sheet, burrs were generated and could be transferred to the transfer target well. There wasn't.
[0069]
[Comparative Example 2]
In Example 2, the volume hologram forming material was used without change except that a polyvinyl acetate system having a glass transition point of around 40 ° C. was used. The breaking strength of the volume hologram forming material prepared here at 20 ° C. to 25 ° C. is 1.5 × 10⁷[Pa], peel strength is 4.6 × 10^Four[Pa]. When the transfer foil sheet was transferred to a vinyl chloride card by applying heat and pressure at 130 ° C. with a specific mold from the base film side of the obtained transfer foil sheet, burrs were generated during the transfer process, and the transfer was successfully transferred to the transfer object. I couldn't.
[0070]
[Evaluation of performance of transfer foil sheets of Examples 1 and 2 and Comparative Examples 1 and 2]
Table 1 below shows the evaluation results of the transfer foil sheets obtained in Examples 1 and 2 and Comparative Examples 1 and 2 with respect to peelability, chemical resistance, scratch resistance, deposition suitability, and flex resistance. The physical property evaluation methods are as follows.
[0071]
Peelability (peelability from a press stamper): a resin layer coated on the base film 2 with an embossing roller 31 and a pressing roller 32 having a hologram original plate 40 formed on the surface thereof, using the hologram replication device shown in FIG. No. 20 was pressed to form irregularities on the surface of the resin layer 20, 1000 m continuous replication was performed, and it was confirmed that there was no resin remaining on the press stamper.
○ ... There is no rest. × ・ ・ ・ There is a rest.
[0072]
Chemical resistance: When the hardened surface of the processed part was rubbed 100 times with gauze soaked with methyl ethyl ketone, the surface having no abnormality was regarded as good, and the surface having abnormality was regarded as defective.
○ ・ ・ ・ Good. X: Defect.
[0073]
Heat resistance: The cured surface of the processed product was heated to 200 ° C. with a hot roll, and discoloration or deformation after holding for 3 minutes was observed. Those having no abnormality were considered good, and those that were yellowed or deformed or peeled were considered bad.
○ ・ ・ ・ Good. X: Defect.
[0074]
Scratch resistance: When the cured surface of the processed product was rubbed 10 times with # 0000 steel wool, the surface that did not change was regarded as good, and the surface that was scratched and whitened was regarded as defective.
○ ・ ・ ・ Good. X: Defect.
[0075]
Vapor deposition suitability: After depositing an aluminum layer on the hologram or diffraction grating formation surface by a vacuum vapor deposition method, the adhesion was evaluated by a cello tape substrate eye test.
○ ... Good vapor deposition. X: Deposition property is poor.
[0076]
Transfer foil sheet suitability: After an aluminum layer is deposited on the hologram or diffraction grating surface by vacuum deposition, an acrylic adhesive (hot stamping agent) for heat sealing is further applied. It was transferred onto a polyvinyl chloride card using a machine, and the foil cutting property and adhesion of the transfer foil sheet were evaluated.
○ ・ ・ ・ Good. X: Defect.
[0077]
Bending resistance: Embossed character processing was performed on the transfer foil transferred onto the polyvinyl chloride card, and it was confirmed whether the embossed character was cracked.
○: No change. X: There is a crack.
[0078]
[Table 1]

[0079]
    [Evaluation of peelability and breakability of transfer foil sheets of Examples 1 and 2 and Comparative Examples 1 and 2]
  Using a lami packer LBP3301 (trade name, manufactured by Japan Office Laminator) at 130 ° C., the adhesive surface of the transfer foil sheets of Examples 1 and 2 and Comparative Examples 1 and 2 on the plywood is 1 m. The transfer foil sheet and the transfer object were laminated at a speed of / min. Next, in an atmosphere of 20 ° C. to 25 ° C., the transfer foil sheet is JISKBy peeling in the direction of 180 ° by the method 6854, the breaking strength at the boundary at the specific portion and the peeling strength between the base film and the peeling layer were measured.
[0080]
  FIG. 9 shows the results of the peel test of the transfer foil sheets of Examples 1 and 2 in a graph in which the horizontal axis indicates elongation (mm) and the vertical axis indicates strength [Pa]. In the graph of FIG. 9, Example 1 is a curve indicated by ▲ and ▼, showing three measurement data, and Example 2 is ●And xIt is a curve shown by 2 and shows measurement data of 2 times.
[0081]
Table 2 shows the breaking strength of the transfer foil sheets of Examples 1 and 2 and the peeling strength between the base film and the peeling layer. The breaking strength is a peak value in the graph, and the peeling strength is a value saturated after the peak. Each value of Examples 1 and 2 represents each average value of measurement data.
[0082]
  FIG. 10 shows the JIS of the transfer foil sheets of Comparative Examples 1 and 2.KThe results of a peel test peeled in the 180 ° direction by the 6854 method are shown in a graph in which the horizontal axis indicates elongation (mm) and the vertical axis indicates strength [Pa]. Table 2 shows the breaking strength and peel strength of the transfer foil sheets of Comparative Examples 1 and 2.
[0083]
[Table 2]

[0084]
  According to Table 2, Examples 1 to2JIS transfer foil sheetKThe breaking strength in an atmosphere of 20 ° C. to 25 ° C. measured using the method of 6854 is 4 × 10^FivePa or more 1 × 10⁶Pa or less and the peel strength is 1 × 10^FivePa or more 6.5 × 10^FiveIt turns out that it is below Pa.
[0085]
【The invention's effect】
According to the transfer foil sheet having the specified breaking strength and peel strength according to the present invention, the transfer layer can exhibit a stable foil breakability during transfer and a peelability from the release layer of the base film. Transfer of the transfer layer on the foil sheet can be reliably performed, and transfer productivity to the transfer target can be improved.
[0086]
According to the evaluation method of the peelability and breakability of the transfer foil sheet of the present invention, two evaluations of the transfer layer foil breakage and the substrate film peelability are simultaneously performed by one simple test. be able to.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a state in which a transferred hologram is obtained by subjecting a transfer target to thermocompression bonding with a hot stamp or the like and then peeling off a hologram transfer foil sheet.
FIG. 2 is a perspective view when the hologram transfer foil sheet is peeled off.
FIG. 3 is a cross-sectional view showing a basic form of a hologram transfer foil sheet of the present invention.
FIG. 4 is a cross-sectional view showing another basic form of the hologram transfer foil sheet of the present invention.
FIG. 5 is a schematic view of the vicinity of a grip portion of a universal material testing machine (trade name) manufactured by Instron, which can measure tensile strength.
FIG. 6 is a graph showing the relationship between tensile strength and elongation of the transfer foil sheet of the present invention.
FIG. 7 is an explanatory view showing a transfer example using the hologram transfer foil sheet of the present invention.
FIG. 8 is a diagram showing a hologram duplicating apparatus.
FIG. 9 is a graph showing the results of the peel test of the transfer foil sheets of Examples 1 and 2, with the horizontal axis representing elongation (mm) and the vertical axis representing strength [Pa].
FIG. 10 is a graph showing the results of a peel test of the transfer foil sheets of Comparative Examples 1 and 2, with the horizontal axis representing elongation (mm) and the vertical axis representing strength [Pa].
[Explanation of symbols]
1 Hologram transfer foil sheet
2 Base film
3 Transfer layer
4 Release layer
5 Hologram formation layer
6 Reflective layer
7 Heat-sensitive adhesive layer
8 Hot stamp
9 Pressure plate
10 Transferee
11 Test piece
12 knobs
20 Resin layer
31 Embossed roller
32 Pressing roller
40 Hologram master

Claims (6)

In a transfer foil sheet in which at least a release layer and a heat-sensitive adhesive layer are formed as a transfer layer on a base film,
The breaking strength between the substrate film and the transfer layer in the transfer laminate when the transfer layer side of the transfer foil sheet is laminated and heat-bonded to the transfer target at a temperature at which heat transfer is performed is 4 × 10 ^Five Pa or more 1 × 10 ⁶ The peel strength in an atmosphere of Pa or lower and 20 ° C. to 25 ° C. is 1 × 10 ^Five Pa or more 6.5 × 10 ^Five A transfer foil sheet, wherein the transfer strength is Pa or less, and the peel strength is measured based on JIS K6854. In the transfer foil sheet in which at least a release layer, a hologram forming layer and a heat-sensitive adhesive layer are formed as a transfer layer on the base film,
The breaking strength between the substrate film and the transfer layer in the transfer laminate when the transfer layer side of the transfer foil sheet is laminated and heat-bonded to the transfer target at a temperature at which heat transfer is performed is 4 × 10 ^Five Pa or more 1 × 10 ⁶ The peel strength in an atmosphere of Pa or lower and 20 ° C. to 25 ° C. is 1 × 10 ^Five Pa or more 6.5 × 10 ^Five A transfer foil sheet, wherein the transfer strength is Pa or less, and the peel strength is measured based on JIS K6854. 3. The transfer foil sheet according to claim 2, wherein the hologram forming layer is a surface relief type hologram having irregularities formed on the surface thereof. 4. The transfer foil sheet according to claim 2, wherein a reflective metal thin film layer is formed between the hologram forming layer and the heat-sensitive adhesive layer. 3. The transfer foil sheet according to claim 2, wherein the hologram forming layer is a volume hologram in which a hologram is formed by recording interference fringes in the forming material. The transfer foil sheet in which at least a release layer and a heat-sensitive adhesive layer are formed as a transfer layer on the base film is overlaid on the transfer object,
The transfer foil sheet is thermocompression bonded at a temperature at which the thermosensitive adhesive is thermally fused,
By measuring the change in peel strength of the obtained transfer laminate using the method of JIS K6854, the break strength at the boundary of the thermocompression bonding part and the peel strength between the base film and the transfer layer can be simplified. A method for evaluating peelability and breakability of a transfer foil sheet, characterized in that:

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