JPH07186514A - Transfer sheet - Google Patents
Transfer sheetInfo
- Publication number
- JPH07186514A JPH07186514A JP5345856A JP34585693A JPH07186514A JP H07186514 A JPH07186514 A JP H07186514A JP 5345856 A JP5345856 A JP 5345856A JP 34585693 A JP34585693 A JP 34585693A JP H07186514 A JPH07186514 A JP H07186514A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- ionizing radiation
- curable resin
- release layer
- transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Decoration By Transfer Pictures (AREA)
- Laminated Bodies (AREA)
- Printing Methods (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、家電機器、および、家
具・建築用内装材等の表面化粧に使用されるハードコー
ト（硬質塗膜）転写シートに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard coat (hard coating) transfer sheet used for surface makeup of home appliances and interior materials for furniture and construction.
【０００２】[0002]
【従来の技術】従来、かかる転写シートにおいて、電離
放射線硬化型樹脂剥離層と絵柄層、接着剤層等の密着性
向上を目的として、電離放射線硬化型樹脂剥離層の２分
の１乃至１０分の１程度のプライマー層を塗布すること
が行われていた。このような加工を行った場合、一般的
に、電離放射線硬化型樹脂剥離層とプライマー層の厚み
は、それぞれ、３〜１０μｍ、０．５〜２μｍであり、
全体の厚みは３．５〜１２μｍであった。2. Description of the Related Art Conventionally, in such a transfer sheet, for the purpose of improving the adhesion between the ionizing radiation-curable resin release layer and the pattern layer, adhesive layer, etc., one half to 10 minutes of the ionizing radiation-curable resin release layer. No. 1 primer layer was applied. When such a processing is performed, the thickness of the ionizing radiation-curable resin release layer and the primer layer are generally 3 to 10 μm and 0.5 to 2 μm, respectively.
The total thickness was 3.5 to 12 μm.
【０００３】上記のような転写シートを使用し、射出成
形同時転写法、熱転写法、または、圧着転写法等により
成形品の表面に転写を行った際に、成形品の残留歪み、
熱収縮、応力収縮、クリープ現象等による収縮、変形量
が電離放射線硬化型樹脂剥離層の収縮、変形量に比して
著しく大きい場合、剥離層と接着剤層、または、絵柄層
との界面の応力集中により、層間の密着力が低下する。
また、電離放射線硬化型樹脂剥離層の架橋密度を極度に
上昇させた場合には、硬化収縮のために剥離層中、およ
び、剥離層と接着剤層等との界面の応力集中により、転
写前段階で既に層間の密着不良が発生することがあっ
た。When the transfer sheet as described above is used and transferred to the surface of the molded article by the injection molding simultaneous transfer method, the thermal transfer method, the pressure transfer method or the like, residual strain of the molded article,
If the amount of shrinkage or deformation due to heat shrinkage, stress shrinkage, creep phenomenon, etc. is significantly larger than the amount of shrinkage or deformation of the ionizing radiation-curable resin release layer, the interface between the release layer and the adhesive layer or the pattern layer The stress concentration reduces the adhesion between layers.
In addition, when the crosslinking density of the ionizing radiation-curable resin release layer is extremely increased, before the transfer due to stress concentration in the release layer due to curing shrinkage and at the interface between the release layer and the adhesive layer, etc. In some cases, poor adhesion between layers may already occur.
【０００４】[0004]
【発明が解決しようとする課題】この様な密着不良の原
因は、いづれの場合も、歪みや応力が電離放射線硬化型
樹脂剥離層に集中するためで、特に、電離放射線硬化型
樹脂剥離層の厚みを３μｍ以上とした時、および、電離
放射線硬化型樹脂剥離層の硬度を鉛筆硬度３Ｈ以上とし
た時に著しく発生するという問題点が明らかとなった。The cause of such poor adhesion is that strain and stress concentrate in the ionizing radiation-curable resin release layer in any case. It became clear that the problem occurs remarkably when the thickness is 3 μm or more and the hardness of the ionizing radiation-curable resin release layer is pencil hardness 3H or more.
【０００５】転写後の電離放射線硬化型樹脂剥離層の耐
摩擦性、耐候性等の品質をさらに向上させるために、電
離放射線硬化型樹脂剥離層の硬度を鉛筆硬度３Ｈ以上の
高硬度に高めようとすると、上記密着不良の発生に加え
て、射出成形同時転写を行う場合や、転写後に折曲げ加
工・絞り加工等の後加工を行った時に、電離放射線硬化
型樹脂剥離層の表面にクラツクが入る不良も発生し、工
程不良発生率が高くなるという問題点もあった。In order to further improve the abrasion resistance and weather resistance of the ionizing radiation-curable resin release layer after transfer, the hardness of the ionizing radiation-curable resin release layer should be increased to a pencil hardness of 3H or higher. Then, in addition to the occurrence of the above-mentioned poor adhesion, a crack is generated on the surface of the ionizing radiation-curable resin release layer when performing simultaneous injection molding transfer or performing post-processing such as bending and drawing after transfer. There is also a problem in that defects may occur and the process defect occurrence rate increases.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記の問題点
に鑑み研究試作を繰り返した結果、電離放射線硬化型樹
脂剥離層に応力緩和層を付設すること、および、応力緩
和層の厚みを電離放射線硬化型樹脂剥離層の厚みの２倍
以上とし、且つ、全体の厚みを４μｍ以下にすることに
より、上記問題点が解決できることを見出してなされた
ものである。In the present invention, as a result of repeating research and trial production in view of the above problems, a stress relaxation layer is attached to an ionizing radiation-curable resin release layer, and the thickness of the stress relaxation layer is reduced. The inventors have found that the above-mentioned problems can be solved by making the thickness of the ionizing radiation-curable resin release layer at least twice the thickness and making the total thickness at 4 μm or less.
【０００７】本発明に係わる転写シートは、基体シート
上に電離放射線硬化型樹脂剥離層、応力緩和層を必須と
し、更に必要に応じ、絵柄層、または、接着剤層のいづ
れか一層以上を積層させた構成であり、また、必要に応
じて基体シートと電離放射線硬化型樹脂剥離層の間に離
型層を設けてもよい。なお、ここで、剥離層とは、転写
時に被転写体の方に転移し、転写後は被転写体の表面保
護層となるものをいう。一方、離型層とは、転写時に基
材シート側と一体となって剥離除去されるものをいう。The transfer sheet according to the present invention requires an ionizing radiation-curable resin release layer and a stress relaxation layer on a base sheet, and further, if necessary, a pattern layer or an adhesive layer is laminated on one or more layers. In addition, a release layer may be provided between the base sheet and the ionizing radiation-curable resin release layer, if necessary. Here, the peeling layer means a layer that is transferred to the transferred body during transfer and becomes a surface protective layer of the transferred body after transfer. On the other hand, the release layer means a layer that is peeled and removed integrally with the base material sheet side at the time of transfer.
【０００８】基体シートの材料は、ポリエチレンテレフ
タレート、ポリブチレンテレフタレート等のポリエステ
ル樹脂フイルム、ポリエチレン、ポリプロピレン等のポ
リオレフイン樹脂フイルム、ポリ塩化ビニル等のビニル
樹脂フイルムの他、上質紙等にポリオレフイン、シリコ
ン樹脂等の離型性樹脂を塗布した塗工紙等が使用され、
厚さは１０μｍ〜２００μｍ程度のものが使用できる。
また、必要に応じて、前記樹脂フイルム上に、さらに、
シリコン樹脂、メラミン樹脂、ポリオレフイン等を用い
て離型層を形成してもよい。Materials for the base sheet include polyester resin films such as polyethylene terephthalate and polybutylene terephthalate; polyolefin resin films such as polyethylene and polypropylene; vinyl resin films such as polyvinyl chloride; and fine paper and the like such as polyolefin and silicone resin. The coated paper etc. coated with the release resin of
A thickness of about 10 μm to 200 μm can be used.
Further, if necessary, further on the resin film,
The release layer may be formed using silicone resin, melamine resin, polyolefin, or the like.
【０００９】更に、転写後の剥離層表面に所望の艶消し
や凹凸模様を賦与したい場合は、該基材シート、また
は、離型層の表面に所望の凹凸と同形状逆凹凸の凹凸模
様を形成してもよい。かかる凹凸模様としては、艶消し
（マツト）、ヘアライン、木目導管、万線状溝、等があ
る。Further, when it is desired to impart a desired matte or uneven pattern to the surface of the release layer after transfer, an uneven pattern having the same shape as the desired unevenness is formed on the surface of the substrate sheet or the release layer. You may form. Examples of such uneven patterns include mats, hairlines, wood grain conduits, and line grooves.
【００１０】電離放射線硬化型樹脂剥離層は、好ましく
は、鉛筆硬度で３Ｈ以上のものとする。鉛筆硬度試験
は、ＪＩＳ−Ｋ−５４０１，６．１４「鉛筆引っかき試
験」に準じて行い、電離放射線硬化型樹脂を鋼板上に２
μｍの厚さに塗布して硬化させ、荷重５００ｇの条件で
測定する。The ionizing radiation-curable resin release layer preferably has a pencil hardness of 3H or more. The pencil hardness test is performed according to JIS-K-5401, 6.14 “Pencil Scratch Test”, and the ionizing radiation curable resin is applied to the steel plate 2 times.
It is applied to a thickness of μm, cured, and measured under a load of 500 g.
【００１１】電離放射線硬化型樹脂素材は、汎用のもの
が使用できる。例えば、１分子中に（メタ）アクリロイ
ル基、（メタ）アクリロイルオキシ基（ここで、（メ
タ）アクリロイルという表記は、アクリロイルまたはメ
タアクリロイルを意味し、以下についても同様であ
る。）等の重合性不飽和結合、エポキシ基、チオール基
等の重合性基を２個以上有する単量体、プレポリマー、
または、両者の混合体を主成分とすることができる。As the ionizing radiation curable resin material, a general-purpose material can be used. For example, a (meth) acryloyl group, a (meth) acryloyloxy group (wherein the expression (meth) acryloyl means acryloyl or methacryloyl, and the same applies below) in one molecule. Monomers, prepolymers having two or more polymerizable groups such as unsaturated bonds, epoxy groups and thiol groups,
Alternatively, a mixture of the two can be the main component.
【００１２】上記単量体、プレポリマー等の例として
は、ウレタン（メタ）アクリレート、ポリエステル（メ
タ）アクリレート、エポキシ（メタ）アクリレート等の
（メタ）アクリレート類、不飽和ポリエステル類、チオ
ール類、ポリビニルピロリドン等が挙げられる。また、
単量体の例としては、トリメチロールプロパントリ（メ
タ）アクリレート、ジペンタエリスリトールヘキサ（メ
タ）アクリレート等のアクリレート単量体等がある。Examples of the above-mentioned monomers and prepolymers are urethane (meth) acrylates, polyester (meth) acrylates, (meth) acrylates such as epoxy (meth) acrylates, unsaturated polyesters, thiols, polyvinyls. Examples thereof include pyrrolidone. Also,
Examples of the monomer include acrylate monomers such as trimethylolpropane tri (meth) acrylate and dipentaerythritol hexa (meth) acrylate.
【００１３】さらに、架橋密度の調整のために、分子中
に重合性不飽和結合１個を含む単量体、非重合性高分
子、例えば、アクリル樹脂、セルロース系樹脂等を添加
してもよい。また、必要に応じて、蝋、ポリエチレンワ
ツクス等のワツクス類、炭酸カルシウム、アルミナ、シ
リカ、アクリルビーズ、ウレタンビーズ、ポリカーボネ
ートビーズ等の樹脂ビーズの様な体質顔料、および、染
料、着色顔料等を添加してもよい。Further, in order to adjust the crosslink density, a monomer containing one polymerizable unsaturated bond in the molecule, a nonpolymerizable polymer such as an acrylic resin, a cellulosic resin or the like may be added. . If necessary, waxes, waxes such as polyethylene wax, extenders such as calcium carbonate, alumina, silica, resin beads such as acrylic beads, urethane beads, and polycarbonate beads, and dyes, coloring pigments, etc. You may add.
【００１４】電離放射線としては、可視光線、紫外線、
Ｘ線等の電磁波、または、電子線等の粒子線が用いら
れ、可視光線、または、紫外線で硬化させる場合には、
ベンゾフエノン、アセトフエノン、チオキサントン等の
公知の光重合開始剤を添加する。The ionizing radiation includes visible light, ultraviolet light,
Electromagnetic waves such as X-rays or particle beams such as electron beams are used, and in the case of curing with visible light or ultraviolet rays,
A known photopolymerization initiator such as benzophenone, acetophenone or thioxanthone is added.
【００１５】応力緩和層は、電離放射線硬化型樹脂剥離
層に発生する歪みを吸収緩和する作用をなすもので、破
断時伸度が電離放射線硬化型樹脂剥離層の１．５倍以上
あり、層の厚みが２倍以上であることが必要である。The stress relaxation layer has a function of absorbing and relaxing the strain generated in the ionizing radiation-curable resin peeling layer, and has an elongation at break of 1.5 times or more that of the ionizing radiation curable resin peeling layer. It is necessary that the thickness is 2 times or more.
【００１６】応力緩和層の素材として、好ましくは、ア
クリル樹脂（（メタ）アクリル酸アルキルエステルの単
独、または、共重合体）、ポリスチレン、塩化ビニル酢
酸ビニル共重合体、ポリ塩化ビニル等の熱可塑性樹脂、
ウレタンエラストマー、合成ゴム等のゴム類が使用でき
る。勿論、破断時伸度が剥離層に用いる電離放射線硬化
型樹脂の１．５倍以上あるものであれば、前記の電離放
射線硬化型樹脂、或いは、ポリウレタン、不飽和ポリエ
ステル等の熱硬化型樹脂でもよい。The material for the stress relaxation layer is preferably a thermoplastic resin such as acrylic resin (homologous (meth) acrylic acid alkyl ester or copolymer), polystyrene, vinyl chloride vinyl acetate copolymer, polyvinyl chloride, or the like. resin,
Rubbers such as urethane elastomer and synthetic rubber can be used. Of course, as long as the elongation at break is 1.5 times or more that of the ionizing radiation curable resin used for the release layer, the above ionizing radiation curable resin or a thermosetting resin such as polyurethane or unsaturated polyester may be used. Good.
【００１７】応力緩和層の厚みが電離放射線硬化型樹脂
剥離層の２倍未満の場合には、電離放射線硬化型樹脂剥
離層の歪みを十分に吸収緩和することができず、成形品
への電離放射線硬化型樹脂剥離層の密着不良や、射出成
形同時転写、および、転写後の絞り加工等で電離放射線
硬化型樹脂剥離層にクラツクが発生する頻度が増加する
という知見が得られた。また、剥離層と応力緩和層との
総厚が４μｍを超える場合は、層全体の可撓性が低下
し、転写シート変形時の歪みや応力が厚み方向に増加す
るため、やはりクラツクの発生や層間密着力が不十分と
なる現象が見られた。When the thickness of the stress relaxation layer is less than twice the thickness of the ionizing radiation-curable resin peeling layer, the strain of the ionizing radiation-curable resin peeling layer cannot be sufficiently absorbed and relaxed, and the ionization to the molded article is performed. It was found that the frequency of occurrence of cracks in the ionizing radiation-curable resin release layer increases due to poor adhesion of the radiation-curable resin release layer, simultaneous injection molding transfer, drawing after transfer, and the like. Further, when the total thickness of the release layer and the stress relaxation layer exceeds 4 μm, the flexibility of the entire layer decreases, and strain and stress at the time of deformation of the transfer sheet increase in the thickness direction. It was observed that the interlayer adhesion was insufficient.
【００１８】応力緩和層の素材が、熱硬化型樹脂、電離
放射線硬化型樹脂等であってもよく、その場合には、汎
用の熱可塑性樹脂を用いた場合に比して鉛筆硬度をさら
に高めることができる。応力緩和層には、必要に応じ、
界面活性剤、銀、ニツケル等の金属粉末、または、箔
片、黒鉛（グラフアイト）の粉末、または、箔片等の帯
電防止剤を添加してもよい。この様にすると、転写時、
または、転写後の帯電による塵埃付着や火花放電等を防
止できて好ましい。The material of the stress relaxation layer may be a thermosetting resin, an ionizing radiation curing resin or the like, in which case the pencil hardness is further increased as compared with the case where a general-purpose thermoplastic resin is used. be able to. The stress relaxation layer, if necessary,
A surfactant, a metal powder such as silver or nickel, a foil piece, a graphite (graphite) powder, or an antistatic agent such as a foil piece may be added. By doing this, during transfer,
Alternatively, it is preferable since dust adhesion, spark discharge, etc. due to charging after transfer can be prevented.
【００１９】接着剤層は、転写層を被転写体に転移、接
着させるための層で、感熱接着剤、粘着剤、溶剤活性型
接着剤、電離放射線硬化性接着剤等の中から用途に応じ
て選定する。なお、絵柄層、剥離層等、接着剤層以外の
転写層自身が充分な接着性を有する時は接着剤層を省略
することもできる。The adhesive layer is a layer for transferring and adhering the transfer layer to the transferred material, and it is selected from among heat sensitive adhesives, pressure sensitive adhesives, solvent activated adhesives, ionizing radiation curable adhesives and the like. To select. The adhesive layer may be omitted when the transfer layer itself other than the adhesive layer, such as the picture layer and the peeling layer, has sufficient adhesiveness.
【００２０】感熱接着剤は加熱によって接着性が発現す
るものであり、通常、熱可塑性樹脂、アイオノマー等が
用いられる。樹脂としては、例えば、硝酸セルロース、
酢酸セルロース等のセルロース誘導体、ポリスチレン、
ポリα−メチルスチレン等のスチレン樹脂またはスチレ
ン共重合体、ポリメタクリル酸メチル、ポリアクリル酸
エチル等のアクリル樹脂またはメタクリル樹脂、塩化ビ
ニル−酢酸ビニル共重合体、エチレン−ビニルアルコー
ル共重合体等のビニル重合体、ロジン、ロジン変成マレ
イン酸樹脂等のロジンエステル樹脂、ポリイソプレンゴ
ム、スチレンブタジエンゴム等の天然、または、合成ゴ
ム類、および、各種アイオノマー等が使用される。The heat-sensitive adhesive exhibits adhesiveness when heated, and a thermoplastic resin, an ionomer or the like is usually used. As the resin, for example, cellulose nitrate,
Cellulose derivatives such as cellulose acetate, polystyrene,
Styrene resin or styrene copolymer such as poly α-methylstyrene, acrylic resin or methacrylic resin such as polymethyl methacrylate, polyethyl acrylate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, etc. Vinyl polymers, rosin, rosin ester resins such as rosin-modified maleic acid resins, natural or synthetic rubbers such as polyisoprene rubber and styrene-butadiene rubber, and various ionomers are used.
【００２１】粘着剤としては、従来公知の粘着テープや
シール類に使用されている粘着剤がいずれも使用でき、
例えば、ポリイソプレンゴム、ポリイソブチルゴム、ス
チレンブタジエンゴム、ブタジエンアクリロニトリルゴ
ム等のゴム系樹脂、（メタ）アクリル酸エステル系樹
脂、ポリビニルエーテル系樹脂、ポリ酢酸ビニル系樹
脂、ポリ塩化ビニル／酢酸ビニル共重合体系樹脂、ポリ
ビニルブチラール系樹脂等の１種または２種以上の混合
体を主成分とした任意の樹脂系に、適当な粘着賦与剤、
例えば、ロジン、ダンマル、重合ロジン、部分水添ロジ
ン、エステルロジン、ポリテルペン系樹脂、テルペン変
性体、石油系樹脂、シクロペンタジエン系樹脂、クマロ
ン−インデン系樹脂等を適当量添加したものであり、更
に必要に応じて、軟化剤、充填剤、老化防止剤、架橋剤
等を添加する。As the pressure-sensitive adhesive, any of the pressure-sensitive adhesives conventionally used for pressure-sensitive adhesive tapes and seals can be used.
For example, rubber-based resins such as polyisoprene rubber, polyisobutyl rubber, styrene-butadiene rubber, and butadiene-acrylonitrile rubber, (meth) acrylic acid ester-based resins, polyvinyl ether-based resins, polyvinyl acetate-based resins, polyvinyl chloride / vinyl acetate A suitable tackifier for any resin system containing, as a main component, one or a mixture of two or more polymers such as polymer resins and polyvinyl butyral resins.
For example, rosin, dammar, polymerized rosin, partially hydrogenated rosin, ester rosin, polyterpene resin, terpene modified product, petroleum resin, cyclopentadiene resin, coumarone-indene resin, etc. added in appropriate amounts, If necessary, a softening agent, a filler, an antiaging agent, a crosslinking agent, etc. are added.
【００２２】[0022]
【作用】本発明による転写シートは、剥離層に高硬度の
電離放射線硬化型樹脂を使用しても、応力緩和層を設け
ることによって電離放射線硬化型樹脂剥離層に硬化時、
または、転写時の歪みが集中しない設計となっており、
真空プレス同時転写、射出成形同時転写等の方法により
被転写材に成形同時転写を行った場合、また、転写後に
折曲げ加工、絞り加工等の成形加工を行っても、密着不
良やクラツクが発生しないという利点を有している。本
発明による転写シートを使用すれば、表面硬度が高く美
麗なハードコート転写成形品を得ることができる。In the transfer sheet according to the present invention, even when a high hardness ionizing radiation curable resin is used for the peeling layer, when the ionizing radiation curable resin peeling layer is cured by providing the stress relaxation layer,
Or, it is designed so that distortion during transfer does not concentrate,
If simultaneous molding and transfer is performed on the material to be transferred by methods such as vacuum press simultaneous transfer and injection molding simultaneous transfer, and even if molding processing such as bending and drawing is performed after transfer, poor adhesion and cracks will occur. It has the advantage of not doing it. By using the transfer sheet according to the present invention, a beautiful hard coat transfer molded article having high surface hardness can be obtained.
【００２３】[0023]
【実施例】以下、本発明の実施例について具体的に説明
する。 （実施例１）基体シート２（東レ製、２軸延伸ポリエチ
レンテレフタレートフイルム、Ｔ−６０（＃２５））
に、ジペンタエリスリトールヘキサアクリレートと３官
能ウレタンアクリレートプレポリマーを主成分とする電
離放射線硬化型樹脂を１μｍ塗布して電離放射線硬化型
樹脂剥離層３を形成し、一旦、溶剤を乾燥し表面を非粘
着状態とし、その上に積層してジペンタエリスリトール
ヘキサアクリレートと熱可塑性ポリメチルメタアクリレ
ート樹脂を主成分とする電離放射線硬化型樹脂を２μｍ
塗布して応力緩和層４を形成した。塗布終了後、電子線
を１７５ＫＶ・５Ｍｒａｄの条件で照射して硬化させ、
グラビア印刷法により絵柄層５を設けて乾燥させた後、
アクリル系熱可塑性樹脂（昭和インク工業所製、ＨＳ−
３２）を１μｍ塗布して感熱接着剤層６を形成し、転写
シート１を得た。EXAMPLES Examples of the present invention will be specifically described below. (Example 1) Base sheet 2 (manufactured by Toray, biaxially stretched polyethylene terephthalate film, T-60 (# 25))
Is coated with 1 μm of an ionizing radiation-curable resin containing dipentaerythritol hexaacrylate and a trifunctional urethane acrylate prepolymer as main components to form an ionizing radiation-curable resin release layer 3, and the solvent is dried once to remove the surface. 2 μm of ionizing radiation curable resin containing dipentaerythritol hexaacrylate and thermoplastic polymethylmethacrylate resin as main components in an adhesive state and laminated thereon
The coating was applied to form the stress relaxation layer 4. After completion of coating, electron beam is irradiated under the condition of 175 KV / 5 Mrad to cure,
After providing the pattern layer 5 by the gravure printing method and drying,
Acrylic thermoplastic resin (Showa Ink Mfg. Co., HS-
32) was applied in an amount of 1 μm to form a heat-sensitive adhesive layer 6 to obtain a transfer sheet 1.
【００２４】（実施例２）基体シート２（東レ製、Ｔ−
６０〔＃２５〕）に、ジペンタエリスリトールヘキサア
クリレートと３官能ウレタンアクリレートプレポリマー
を主成分とする実施例１と同様の電離放射線硬化型樹脂
を１μｍ塗布して電離放射線硬化型樹脂剥離層３を形成
し、それに積層して熱可塑性アクリル系樹脂（ザ・イン
クテツク製、ＥＢプライマー）を２μｍ塗布して応力緩
和層４を形成した。さらに、この上にグラビア印刷法に
より絵柄層５を設けて乾燥させた後、アクリル系熱可塑
性樹脂（昭和インク工業所製、ＨＳ−３２）を塗布して
感熱接着剤層６を形成し、実施例２を作製した。(Example 2) Base sheet 2 (manufactured by Toray, T-
60 [# 25]) with 1 μm of the same ionizing radiation curable resin as in Example 1 containing dipentaerythritol hexaacrylate and a trifunctional urethane acrylate prepolymer as main components, to form an ionizing radiation curable resin release layer 3. A stress-relieving layer 4 was formed by applying a thermoplastic acrylic resin (manufactured by The Inktech Co., Ltd., EB primer) to a thickness of 2 μm by laminating it. Further, a pattern layer 5 is provided thereon by a gravure printing method and dried, and then an acrylic thermoplastic resin (HS-32 manufactured by Showa Ink Mfg. Co., Ltd.) is applied to form a heat-sensitive adhesive layer 6, Example 2 was made.
【００２５】（比較例）基体シート２（東レ製、Ｔ−６
０〔＃２５〕）に、実施例１と同じ、ジペンタエリスリ
トールヘキサアクリレートと３官能ウレタンアクリレー
トプレポリマーを主成分とする電離放射線硬化型樹脂を
１０μｍ塗布して電離放射線硬化型樹脂剥離層３を形成
した後、プライマー層として熱可塑性アクリル樹脂（ザ
・インクテツク製）を４μｍ塗布した。これに、電子線
を照射して硬化させ、グラビア印刷法により絵柄層５を
設けて乾燥させた後、接着剤としてアクリル系熱可塑性
樹脂（昭和インク工業所製、ＨＳ−３２）を塗布して感
熱接着剤層６を形成し、比較例を作製した。(Comparative Example) Substrate sheet 2 (T-6, Toray)
0 [# 25]), the same as in Example 1, was coated with an ionizing radiation-curable resin containing dipentaerythritol hexaacrylate and a trifunctional urethane acrylate prepolymer as main components in an amount of 10 μm to form an ionizing radiation-curable resin release layer 3. After the formation, a thermoplastic acrylic resin (manufactured by The Inktech Co., Ltd.) was applied as a primer layer in a thickness of 4 μm. This is irradiated with an electron beam to be cured, a pattern layer 5 is provided by a gravure printing method and dried, and then an acrylic thermoplastic resin (HS-32 manufactured by Showa Ink Mfg. Co., Ltd.) is applied as an adhesive. The heat-sensitive adhesive layer 6 was formed to prepare a comparative example.
【００２６】物性評価として、アクリル樹脂板に、実施
例１、２、および、比較例を同条件で転写後に、同条件
で２Ｒの絞り成型加工を行った成形物の外観検査、成形
物表面の鉛筆硬度試験、および、＃００００のスチール
ウール１０往復耐摩擦性試験を実施した。その結果は下
表の通りで、実施例１が最良であることが確認された。
なお、表中において、○印は良好であること、△印はや
や劣ることを示している。As a physical property evaluation, the appearance of the molded product, which was subjected to a 2R drawing process under the same conditions, was transferred to an acrylic resin plate under the same conditions as in Examples 1 and 2 and Comparative Example, and the surface of the molded product was inspected. A pencil hardness test and a # 0000 steel wool 10 round trip abrasion resistance test were performed. The results are shown in the table below, and it was confirmed that Example 1 was the best.
In the table, ◯ indicates good and Δ indicates slightly inferior.
【００２７】[0027]
【表１】 [Table 1]
【００２８】[0028]
【発明の効果】成形品の表面を保護装飾するための転写
シートには、美しい外観、十分な硬度と耐摩擦性が必要
とされる。本発明による転写シートは、剥離層に高硬度
の電離放射線硬化型樹脂を使用していても、剥離層の硬
化収縮、成形品の残留歪み、熱収縮等による変形収縮や
転写後の成型加工等によって生ずる歪みを、応力緩和層
が吸収緩和することによって、電離放射線硬化型樹脂剥
離層に集中することを防止する効果を顕著に示し、ハー
ドコート転写シートとして優れた特性を持っていること
が確認された。そして、本発明による転写シートを使用
した成形品では、製造時の密着不良・クラツク・摩擦傷
等の発生が少なく、且つ、使用に際しても、長期間美し
い外観を保持し、高い耐久性を発揮することが明らかと
なった。A transfer sheet for protecting and decorating the surface of a molded article is required to have a beautiful appearance, sufficient hardness and abrasion resistance. In the transfer sheet according to the present invention, even when a high hardness ionizing radiation curable resin is used for the release layer, curing shrinkage of the release layer, residual distortion of the molded product, deformation shrinkage due to heat shrinkage, molding processing after transfer, etc. It is confirmed that the stress relaxation layer absorbs and relaxes the strain caused by the ionizing radiation curing type resin release layer to prevent it from being concentrated in the release layer, and has excellent properties as a hard coat transfer sheet. Was done. The molded product using the transfer sheet according to the present invention is less likely to cause poor adhesion, cracking, frictional scratches, etc. during manufacturing, and retains a beautiful appearance for a long time even during use and exhibits high durability. It became clear.
【図面の簡単な説明】[Brief description of drawings]
【図１】図１は、本発明の実施例１の断面を模式的に示
した図である。FIG. 1 is a diagram schematically showing a cross section of a first embodiment of the present invention.
【図２】図２は、本発明の実施例１において、更に、基
体シートと電離放射線硬化樹脂剥離層との間に、離型層
を設けたものの断面を模式的に示した図である。FIG. 2 is a diagram schematically showing a cross section of Example 1 of the present invention in which a release layer is further provided between the base sheet and the ionizing radiation curable resin release layer.
１・・・転写シート ２・・・基体シート ３・・・電離放射線硬化型樹脂剥離層 ４・・・応力緩和層 ５・・・絵柄層 ６・・・接着剤層 ７・・・離型層 DESCRIPTION OF SYMBOLS 1 ... Transfer sheet 2 ... Substrate sheet 3 ... Ionizing radiation curable resin release layer 4 ... Stress relaxation layer 5 ... Design layer 6 ... Adhesive layer 7 ... Release layer
【表１】 [Table 1]
Claims (4)
離放射線硬化型樹脂剥離層、応力緩和層を必須とし、更
に必要に応じ、絵柄層、または、接着剤層のいずれか一
層以上を設けてなる転写シートにおいて、電離放射線硬
化型樹脂剥離層の厚みが応力緩和層の厚みの２分の１以
下であり、且つ電離放射線硬化型樹脂剥離層と応力緩和
層の厚みの和が４μｍ以下であることを特徴とする転写
シート。1. A substrate sheet essentially comprises an ionizing radiation-curable resin release layer and a stress relaxation layer as transfer layers, and if necessary, one or more of a pattern layer and an adhesive layer are provided. In the transfer sheet, the thickness of the ionizing radiation-curable resin release layer is ½ or less of the thickness of the stress relaxation layer, and the total thickness of the ionizing radiation-curable resin release layer and the stress relaxation layer is 4 μm or less. A transfer sheet characterized by being present.
離層に比べ、破断時伸度が１．５倍以上大きいことを特
徴とする請求項１記載の転写シート。2. The transfer sheet according to claim 1, wherein the stress relaxation layer has a breaking elongation of 1.5 times or more as large as that of the ionizing radiation-curable resin release layer.
電離放射線硬化型樹脂であることを特徴とする請求項２
記載の転写シート。3. The stress relaxation layer is a thermosetting resin, or
An ionizing radiation curable resin.
The transfer sheet described.
離層の間に、離型層を設けたことを特徴とする請求項
１、請求項２、および、請求項３記載の転写シート。4. The transfer sheet according to claim 1, wherein a release layer is provided between the base sheet and the ionizing radiation-curable resin release layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34585693A JP3440339B2 (en) | 1993-12-24 | 1993-12-24 | Transfer sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34585693A JP3440339B2 (en) | 1993-12-24 | 1993-12-24 | Transfer sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07186514A true JPH07186514A (en) | 1995-07-25 |
| JP3440339B2 JP3440339B2 (en) | 2003-08-25 |
Family
ID=18379458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34585693A Expired - Fee Related JP3440339B2 (en) | 1993-12-24 | 1993-12-24 | Transfer sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3440339B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1038665A1 (en) * | 1998-07-14 | 2000-09-27 | Dai Nippon Printing Co., Ltd. | Decorative material |
| JP2001054999A (en) * | 1999-08-18 | 2001-02-27 | Dainippon Printing Co Ltd | Partially matte surface protective layer transfer sheet |
| JP2009083189A (en) * | 2007-09-28 | 2009-04-23 | Fuji Seal International Inc | Printing transfer film |
| WO2010092744A1 (en) * | 2009-02-16 | 2010-08-19 | 日本写真印刷株式会社 | External appearance inspecting device and resin molded article manufacturing method |
| JP2010194796A (en) * | 2009-02-24 | 2010-09-09 | Dic Corp | Active energy ray curable transfer sheet |
| JP2012213934A (en) * | 2011-03-31 | 2012-11-08 | Dainippon Printing Co Ltd | Decorative sheet and method of manufacturing the same |
| WO2019151391A1 (en) | 2018-01-31 | 2019-08-08 | 大日本印刷株式会社 | Heat transfer sheet, coating liquid for release layer, and method for manufacturing heat transfer sheet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6444795A (en) * | 1987-08-11 | 1989-02-17 | Dainippon Printing Co Ltd | Transfer sheet and transfer method using transfer sheet |
| JPH0253885A (en) * | 1988-08-17 | 1990-02-22 | Dainippon Printing Co Ltd | Transfer foil |
-
1993
- 1993-12-24 JP JP34585693A patent/JP3440339B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6444795A (en) * | 1987-08-11 | 1989-02-17 | Dainippon Printing Co Ltd | Transfer sheet and transfer method using transfer sheet |
| JPH0253885A (en) * | 1988-08-17 | 1990-02-22 | Dainippon Printing Co Ltd | Transfer foil |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2402159A1 (en) * | 1998-07-14 | 2012-01-04 | Dai Nippon Printing Co., Ltd. | Decorative material |
| US6852399B2 (en) | 1998-07-14 | 2005-02-08 | Dai Nippon Printing Co., Ltd. | Decorative material |
| EP1038665A4 (en) * | 1998-07-14 | 2009-01-21 | Dainippon Printing Co Ltd | Decorative material |
| EP1038665A1 (en) * | 1998-07-14 | 2000-09-27 | Dai Nippon Printing Co., Ltd. | Decorative material |
| EP2402158A1 (en) * | 1998-07-14 | 2012-01-04 | Dai Nippon Printing Co., Ltd. | Decorative material |
| JP2001054999A (en) * | 1999-08-18 | 2001-02-27 | Dainippon Printing Co Ltd | Partially matte surface protective layer transfer sheet |
| JP2009083189A (en) * | 2007-09-28 | 2009-04-23 | Fuji Seal International Inc | Printing transfer film |
| WO2010092744A1 (en) * | 2009-02-16 | 2010-08-19 | 日本写真印刷株式会社 | External appearance inspecting device and resin molded article manufacturing method |
| JP2010190597A (en) * | 2009-02-16 | 2010-09-02 | Nissha Printing Co Ltd | Device for visual inspection, and method of manufacturing resin molded article |
| JP2010194796A (en) * | 2009-02-24 | 2010-09-09 | Dic Corp | Active energy ray curable transfer sheet |
| JP2012213934A (en) * | 2011-03-31 | 2012-11-08 | Dainippon Printing Co Ltd | Decorative sheet and method of manufacturing the same |
| WO2019151391A1 (en) | 2018-01-31 | 2019-08-08 | 大日本印刷株式会社 | Heat transfer sheet, coating liquid for release layer, and method for manufacturing heat transfer sheet |
| KR20200058519A (en) | 2018-01-31 | 2020-05-27 | 다이니폰 인사츠 가부시키가이샤 | Thermal transfer sheet, coating solution for release layer, and method for manufacturing thermal transfer sheet |
| US11148450B2 (en) | 2018-01-31 | 2021-10-19 | Dai Nippon Printing Co., Ltd. | Thermal transfer sheet, coating liquid for release layer, and method for producing thermal transfer sheet |
| US11912053B2 (en) | 2018-01-31 | 2024-02-27 | Dai Nippon Printing Co., Ltd. | Thermal transfer sheet, coating liquid for release layer, and method for producing thermal transfer sheet |
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| Publication number | Publication date |
|---|---|
| JP3440339B2 (en) | 2003-08-25 |
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