JP2013199001A - In-mold transfer foil, decorative molded article, and method of manufacturing decorative molded article - Google Patents
In-mold transfer foil, decorative molded article, and method of manufacturing decorative molded article Download PDFInfo
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Abstract
【課題】高い表面硬度を有しつつ、且つ、成形品表面に高精細な凹凸を形成することのできる、インモールド用転写箔を提供する。
【解決手段】第一のベースフィルムの一方の面に、剥離層と、紫外線硬化性樹脂を含むハードコート層と、所定の絵柄パターンを有する印刷層と、該印刷層を成形品の表面に接着させるための第一の接着層とをこの順序で備え、前記第一のベースフィルムのもう一方の面に、２液硬化性樹脂を含む第二の接着層が設けられている加飾箔と、第二のベースフィルムの一方の面に、熱硬化性樹脂または紫外線硬化性樹脂からなる凹凸形成層を有している凹凸模様賦形箔と、を、前記加飾箔の第二の接着層と前記凹凸模様賦形箔の凹凸形成層が無いほうの面を対向させるようにして接着させていることを特徴とするインモールド用転写箔。
【選択図】図２The present invention provides an in-mold transfer foil that has a high surface hardness and is capable of forming highly fine irregularities on the surface of a molded product.
On one surface of a first base film, a release layer, a hard coat layer containing an ultraviolet curable resin, a printed layer having a predetermined pattern, and the printed layer are bonded to the surface of a molded product A decorative foil provided with a second adhesive layer including a two-component curable resin on the other surface of the first base film, A concavo-convex pattern shaping foil having a concavo-convex forming layer made of a thermosetting resin or an ultraviolet curable resin on one surface of the second base film, and a second adhesive layer of the decorative foil A transfer foil for in-mold, wherein the surface having no concavo-convex forming layer of the concavo-convex shaped foil is bonded so as to face each other.
[Selection] Figure 2
Description
本発明は、工業製品の表面の加飾に適したインモールド用転写箔、および、該インモールド用転写箔により装飾された加飾成形品とその製造方法に関する。 The present invention relates to an in-mold transfer foil suitable for decorating the surface of an industrial product, a decorative molded product decorated with the in-mold transfer foil, and a method for producing the same.
インモールド用転写箔を用いた成形品は、日用品や生活用品などの機器本体、食品や各種物品の容器類、電子機器や事務用品などの筐体類に用いられる。 Molded articles using the in-mold transfer foil are used in equipment bodies such as daily necessities and daily necessities, containers for food and various articles, and housings such as electronic equipment and office supplies.
インモールド用転写箔とは、基材となるベースフィルム上に、たとえば、剥離層、印刷層、接着層を形成したプラスチック加飾成形用の転写箔である。インモールド成形は、一対の射出成形用金型間に該転写箔を供給し、該射出成形用金型によって形成されるキャビティに加熱加圧した成形樹脂を充填後、ベースフィルム及び剥離層を剥離して、成形樹脂に印刷層を転写して装飾を行う成形法である。 The in-mold transfer foil is a transfer foil for plastic decorative molding in which, for example, a release layer, a print layer, and an adhesive layer are formed on a base film serving as a base material. In-mold molding supplies the transfer foil between a pair of injection molds, fills the cavity formed by the injection mold with heat-pressed molding resin, and then peels the base film and release layer. Thus, a molding method is performed in which a printing layer is transferred to a molding resin for decoration.
表面硬度の高い成形品を得るためのインモールド用転写箔としては、剥離層の表面上に紫外線硬化性樹脂からなるハードコート層を形成し、さらにその上に印刷層、接着層などを形成したものがある。この場合、成形前のインモールド用転写箔に紫外線を照射し、ハードコート層を硬化させてしまうと、成形性が損なわれることから、成形後に成形品に紫外線を照射し、ハードコート層を硬化させることが望ましい。 As an in-mold transfer foil for obtaining a molded product having a high surface hardness, a hard coat layer made of an ultraviolet curable resin was formed on the surface of the release layer, and a printed layer, an adhesive layer, etc. were further formed thereon. There is something. In this case, if the hard coat layer is cured by irradiating the in-mold transfer foil before molding, the moldability will be lost. It is desirable to make it.
従来のインモールド用転写箔は、文字や絵柄等をベースフィルム上に平面的に印刷しただけの構造であるため、成形品表面の立体感が乏しいという問題があった。成形品表面に立体感を持たせる方法として、成形時にキャビティを構成する一対の射出成形用金型の内側のベースフィルムが対接する側に、予め凹凸を設けておく方法がある。しかし、このような凹凸形成法では、１つの射出成形用金型に対して、１つの凹凸模様にしか対応できず、多様な凹凸模様に対応するには、多数の射出成形用金型を用意しなければならず、コストが高くなるといった問題が生じる。 Since the conventional in-mold transfer foil has a structure in which characters, pictures, and the like are simply printed on a base film in a flat manner, there is a problem that the three-dimensional effect on the surface of the molded product is poor. As a method of giving a three-dimensional feeling to the surface of a molded product, there is a method of providing unevenness in advance on the side where the base film inside a pair of injection molds that constitute a cavity at the time of molding contacts. However, such a concavo-convex forming method can deal with only one concavo-convex pattern for one injection mold, and a large number of injection molds are prepared to support various concavo-convex patterns. This has the problem of increasing costs.
そこで、成形品表面に凹凸を形成する方法として、ベースフィルムの一方の面に、剥離層、印刷層、該印刷層を成形品の表面に接着させるための接着層を備え、別のベースフィルムの一方の面に、印刷による凹凸形成層を設け、この２枚のフィルムを該射出成形用金型のキャビティ内に同時に供給するといった方法がある。（例えば、特許文献１参照）。 Therefore, as a method of forming irregularities on the surface of the molded product, a release layer, a printing layer, and an adhesive layer for adhering the printed layer to the surface of the molded product are provided on one surface of the base film. There is a method in which a concavo-convex forming layer is provided on one surface, and the two films are simultaneously supplied into the cavity of the injection mold. (For example, refer to Patent Document 1).
しかし、２枚のフィルムを同時に射出成形用金型のキャビティ内に供給した後、加熱加圧した成形樹脂を充填するといった凹凸形成の方法では、２枚のフィルムがずれやすく、予め設定されている定位置と合致しにくいといった問題が生じる。 However, in the method for forming irregularities, in which two films are simultaneously supplied into a cavity of an injection mold and then filled with a molding resin that has been heated and pressed, the two films are easily displaced and are set in advance. There is a problem that it is difficult to match the fixed position.
また、工業製品は、長期にわたる使用や過酷な環境での使用が予想されるため、工業製品の加飾に用いるインモールド用転写箔には転写後の成形品の表面硬度の高い転写箔が求められるといった問題がある。 In addition, because industrial products are expected to be used for a long time or in harsh environments, transfer foils for in-molds used for decorating industrial products require transfer foils with high surface hardness of the molded product after transfer. There is a problem of being.
本発明は、このような問題点を解決しようとするものであり、成形品表面に印刷層とずれることなく凹凸を形成しつつ、且つ、高い表面硬度を有する成形品を提供することの出来る転写箔を提案することを目的とする。 The present invention is intended to solve such problems, and is capable of providing a molded product having high surface hardness while forming irregularities on the molded product surface without shifting from the printed layer. The purpose is to propose a foil.
上記課題を解決するために、本発明の請求項１の発明は、第一のベースフィルムの一方の面に、剥離層と、紫外線硬化性樹脂を含むハードコート層と、所定の絵柄パターンを有する印刷層と、該印刷層を成形品の表面に接着させるための第一の接着層とをこの順序で備え、前記第一のベースフィルムのもう一方の面に、２液硬化性樹脂を含む第二の接着層が設けられている加飾箔と、
第二のベースフィルムの一方の面に、熱硬化性樹脂または紫外線硬化性樹脂からなる凹凸形成層を有している凹凸模様賦形箔と、を、
前記加飾箔の第二の接着層と前記凹凸模様賦形箔の凹凸形成層が無いほうの面を対向させるようにして接着させていることを特徴とするインモールド用転写箔、である。
In order to solve the above-mentioned problem, the invention of claim 1 of the present invention has a release layer, a hard coat layer containing an ultraviolet curable resin, and a predetermined pattern on one surface of the first base film. A printed layer and a first adhesive layer for adhering the printed layer to the surface of the molded article in this order, and a second liquid curable resin containing a two-component curable resin on the other surface of the first base film A decorative foil provided with a second adhesive layer;
A concavo-convex pattern shaping foil having a concavo-convex forming layer made of a thermosetting resin or an ultraviolet curable resin on one surface of the second base film,
A transfer foil for in-mold, wherein the second adhesive layer of the decorative foil and the surface having no concave-convex forming layer of the concave-convex pattern-shaped foil are adhered to face each other.
また、請求項２に記載の発明は、第一のベースフィルムの一方の面に、剥離層と、紫外線硬化性樹脂を含むハードコート層と、所定の絵柄パターンを有する印刷層と、該印刷層を成形品の表面に接着させるための第一の接着層とをこの順序で備え、前記第一のベースフィルムのもう一方の面に、２液硬化性樹脂を含む第二の接着層が設けられている加飾箔と、
第二のベースフィルムの一方の面に、熱硬化性樹脂または紫外線硬化性樹脂からなる凹凸形成層を有している凹凸模様賦形箔と、を、
前記加飾箔の第二の接着層と前記凹凸模様賦形箔の凹凸形成層を対向させるようにして接着させていることを特徴とするインモールド用転写箔、である。
In addition, the invention according to claim 2 is provided with a release layer, a hard coat layer containing an ultraviolet curable resin, a printed layer having a predetermined pattern, and the printed layer on one surface of the first base film. And a first adhesive layer for adhering to the surface of the molded article in this order, and a second adhesive layer containing a two-component curable resin is provided on the other surface of the first base film. With decorative foil,
A concavo-convex pattern shaping foil having a concavo-convex forming layer made of a thermosetting resin or an ultraviolet curable resin on one surface of the second base film,
A transfer foil for in-mold, wherein the second adhesive layer of the decorative foil and the concavo-convex forming layer of the concavo-convex pattern shaping foil are adhered to face each other.
また、請求項３に記載の発明は、請求項１〜２のいずれかに記載のインモールド用転写箔の第一の接着層のある面に成形樹脂を射出して金型により所定の成形品の形状の成形したのち金型を外す成形工程と、
前記凹凸模様賦形箔および前記第一のベースフィルムおよび前記剥離層を、前記成形品の表面から剥離する剥離工程と、
前記成形品の表面に露出した前記ハードコート層に紫外線を照射して前記ハードコート層を硬化させる硬化工程と、を有することを特徴とする加飾成形品製造方法、である。
According to a third aspect of the present invention, there is provided a predetermined molded product by injecting a molding resin onto the surface having the first adhesive layer of the in-mold transfer foil according to any one of the first and second aspects. After the molding of the shape, the molding process to remove the mold,
A peeling step of peeling the concavo-convex pattern forming foil and the first base film and the release layer from the surface of the molded article;
And a curing step of curing the hard coat layer by irradiating the hard coat layer exposed on the surface of the molded product with ultraviolet rays.
また、請求項４に記載の発明は、請求項１〜２のいずれかに記載のインモールド用転写箔を用い、請求項３に記載の加飾成形品製造方法により製造された加飾成形品、である。 Moreover, invention of Claim 4 uses the transfer foil for in-molds in any one of Claims 1-2, and is a decorative molded product manufactured by the decorative molded product manufacturing method of Claim 3. .
本発明の転写箔を使用すれば、転写時に、凹凸形成層よりその凹凸パターンに従い、印刷層の模様に合致した凹凸を成形品の表面に形成することができる。また、本発明のインモールド用転写箔は、加飾箔と凹凸模様賦形箔を別々に作ることで、工程負荷を減らすことができるため、コストを削減できて経済的である。さらに、加飾箔に紫外線硬化性樹脂からなるハードコート層を設けることができるので高い表面硬度を有する成形品を製造することができる。 If the transfer foil of the present invention is used, it is possible to form irregularities that match the pattern of the printed layer on the surface of the molded product according to the irregular pattern from the irregularity forming layer during transfer. Moreover, since the transfer foil for in-mold of this invention can reduce process load by making a decorative foil and a concavo-convex pattern shaping foil separately, it can reduce cost and is economical. Furthermore, since a hard coat layer made of an ultraviolet curable resin can be provided on the decorative foil, a molded product having a high surface hardness can be produced.
以下、図面を援用して本発明の実施形態の一例を説明する。
インモールド射出成形法とは、（１）インモールド用転写箔を準備する工程、（２）該インモールド用転写箔を射出成形用金型内へ挿入する工程、（３）該射出成形用金型へ樹脂を射出成形し密着させることで、該樹脂の表面にインモールド用転写箔の印刷層を転写する工程、（４）冷却後、射出成形用金型を開放し、ベースフィルム及び剥離層を剥離して成形品を取り出す工程、の４つの工程からなる射出成形法である。
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
The in-mold injection molding method includes (1) a step of preparing an in-mold transfer foil, (2) a step of inserting the in-mold transfer foil into an injection mold, and (3) the injection mold. A step of transferring the printed layer of the in-mold transfer foil onto the surface of the resin by injection molding and adhering the resin to the mold, (4) after cooling, the injection mold is opened, and the base film and the release layer This is an injection molding method consisting of four steps, namely, a step of peeling off and taking out a molded product.
本発明のインモールド用転写箔は、第一のベースフィルム１の一方の面に、剥離層２と、紫外線硬化性樹脂を含むハードコート層３と、所定の絵柄パターンを有する印刷層４と、該印刷層を成形品の表面に接着させるための第一の接着層５とをこの順序で備え、第一のベースフィルム１のもう一方の面に、２液硬化性樹脂を含む第二の接着層６が設けられている加飾箔７と、第二のベースフィルム８の一方の面に、熱硬化性樹脂または紫外線硬化性樹脂を用いたエンボス加工による凹凸形成層９を有している凹凸模様賦形箔１０とを、接着させた層構成である。 The transfer foil for in-mold of the present invention has a release layer 2, a hard coat layer 3 containing an ultraviolet curable resin, a printed layer 4 having a predetermined pattern, on one surface of the first base film 1. A first adhesive layer 5 for adhering the printed layer to the surface of the molded product in this order, and a second adhesive containing a two-component curable resin on the other surface of the first base film 1 Concavity and convexity having a concave-convex forming layer 9 by embossing using a thermosetting resin or an ultraviolet curable resin on one surface of the decorative foil 7 provided with the layer 6 and the second base film 8 This is a layer structure in which the pattern forming foil 10 is bonded.
第一のベースフィルム１および第二のベースフィルム８としては、製造および成形工程で必要な耐熱性、機械的強度、耐溶剤性などがあれば、用途に応じて種々の材料を適用することができる。例えば、ポリエステル系樹脂、ポリアミド系樹脂、ポリオレフィン系樹脂、ビニル系樹脂、アクリル系樹脂、セルロース系樹脂などである。耐熱性や機械的強度の点で、好ましくは、ポリエチレンテレフタレート、ポリエチレンナフタレートなどのポリエステル系樹脂のフィルムが挙げられ、なかでもポリエチレンテレフタレート樹脂のフィルムが最適である。 As the first base film 1 and the second base film 8, various materials can be applied depending on the use as long as they have heat resistance, mechanical strength, solvent resistance and the like necessary in the production and molding processes. it can. For example, polyester resin, polyamide resin, polyolefin resin, vinyl resin, acrylic resin, cellulose resin, and the like. From the viewpoint of heat resistance and mechanical strength, a film of a polyester resin such as polyethylene terephthalate or polyethylene naphthalate is preferable, and a film of polyethylene terephthalate resin is the most preferable.
剥離層２の材質としては、必要な剥離性を備えた樹脂であれば特に限定されないが、本発明のインモールド用転写箔ではメラミン系樹脂またはアクリル系樹脂を用いることが好ましい。メラミン系樹脂またはアクリル系樹脂を用いた剥離層２は、ハードコート層３との組み合わせで安定した剥離性を発揮する。剥離層２の形成方法としては、周知の印刷法や塗工法を用いることができる。 The material of the release layer 2 is not particularly limited as long as it is a resin having a required release property, but it is preferable to use a melamine resin or an acrylic resin in the transfer foil for in-mold of the present invention. The release layer 2 using a melamine resin or an acrylic resin exhibits stable release properties in combination with the hard coat layer 3. As a method for forming the release layer 2, a known printing method or coating method can be used.
ハードコート層３は、転写後に第一のベースフィルム１を剥離した際に、成形品の最表面層となる層である。ハードコート層３の材料としては、紫外線で硬化する紫外線硬化性樹脂を用いる。紫外線硬化性のハードコート層であれば、紫外線照射によって直ちに成形品表面を硬化させることができるため、成形品の生産効率が向上することになる。また、未硬化の状態で成形し、成形後に硬化させることで、成形性向上と物性向上の両立が可能である。ハードコート層３の形成方法としては、周知の印刷法や塗工法を用いることができる。 The hard coat layer 3 is a layer that becomes the outermost surface layer of the molded product when the first base film 1 is peeled off after transfer. As a material of the hard coat layer 3, an ultraviolet curable resin that is cured by ultraviolet rays is used. In the case of an ultraviolet curable hard coat layer, the surface of the molded product can be immediately cured by irradiation with ultraviolet rays, so that production efficiency of the molded product is improved. Further, by molding in an uncured state and curing after molding, it is possible to improve both moldability and physical properties. As a method for forming the hard coat layer 3, a known printing method or coating method can be used.
印刷層４の材料としては、適切な色の顔料または染料を着色剤として含有する着色インキを用いる。印刷層４の形成法としては、オフセット印刷法、グラビア印刷法、スクリーン印刷法などの通常の印刷法を用いることができる。好ましくは、多色刷りや階調表現が可能で、且つ、大量生産に適しているグラビア印刷法で印刷するのが良い。また、ハードコート層３との密着性を向上させるために、印刷層４とハードコート層３との間に、アンカー層（図示せず）を設けても良い。アンカー層の形成方法としては、グラビア印刷法、スクリーン印刷法などの印刷法を用いることができる。特に、膜厚、生産性の点からグラビア印刷法で印刷するのが望ましい。 As a material for the printing layer 4, a colored ink containing a pigment or dye of an appropriate color as a colorant is used. As a method for forming the printing layer 4, a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method can be used. It is preferable to print by a gravure printing method that can perform multicolor printing and gradation expression and is suitable for mass production. An anchor layer (not shown) may be provided between the print layer 4 and the hard coat layer 3 in order to improve the adhesion with the hard coat layer 3. As a method for forming the anchor layer, a printing method such as a gravure printing method or a screen printing method can be used. In particular, it is desirable to print by a gravure printing method from the viewpoint of film thickness and productivity.
第一の接着層５は、成形品の表面に上記の各層を接着するものである。第一の接着層５としては、成形樹脂１２に適した感熱性あるいは感圧性の樹脂を適宜利用する。接着層の形成方法としては、グラビア印刷法、スクリーン印刷法などの印刷法を用いることができる。特に、膜厚、生産性の点からグラビア印刷法で印刷するのが望ましい。なお、印刷層４が成形品に対して充分接着性を有しており、接着層としての効果も備えている場合には、第一の接着層５を別に設けなくても良い。 The first adhesive layer 5 adheres each of the above layers to the surface of the molded product. As the first adhesive layer 5, a heat-sensitive or pressure-sensitive resin suitable for the molding resin 12 is appropriately used. As a method for forming the adhesive layer, a printing method such as a gravure printing method or a screen printing method can be used. In particular, it is desirable to print by a gravure printing method from the viewpoint of film thickness and productivity. In addition, when the printing layer 4 has sufficient adhesiveness with respect to a molded article and also has the effect as an adhesive layer, it is not necessary to provide the 1st adhesive layer 5 separately.
第二の接着層６は、上記の層構成を備える加飾箔７と後述の凹凸模様賦形箔１０とを接着させるものである。第二の接着層６の材料としては、二液硬化型樹脂または熱硬化性樹脂を用いることができる。しかし、熱硬化性樹脂を用いると、インモールド用転写箔１１の耐熱性が低下し、成形性が損なわれる。そこで、ポリエステル系樹脂またはポリエーテル系樹脂など二液硬化型樹脂を用いて第二の接着層６を形成するのが良い。 The 2nd contact bonding layer 6 adheres decorating foil 7 provided with said layer structure, and the uneven | corrugated pattern shaping foil 10 mentioned later. As a material for the second adhesive layer 6, a two-component curable resin or a thermosetting resin can be used. However, when a thermosetting resin is used, the heat resistance of the in-mold transfer foil 11 is lowered and the moldability is impaired. Therefore, it is preferable to form the second adhesive layer 6 using a two-component curable resin such as a polyester resin or a polyether resin.
第二のベースフィルム８に設けられている凹凸形成層９は、グラビア印刷法やスクリーン印刷法によって印刷することで形成できる。凹凸形成層９の材料としては、転写時に受ける熱や圧力に耐えることのできる熱硬化性樹脂または紫外線硬化性樹脂を用いるのが良い。 The unevenness forming layer 9 provided on the second base film 8 can be formed by printing by a gravure printing method or a screen printing method. As the material of the unevenness forming layer 9, it is preferable to use a thermosetting resin or an ultraviolet curable resin that can withstand the heat and pressure received during transfer.
また、凹凸形成層９は、熱硬化性樹脂または紫外線硬化性樹脂をグラビア印刷法、グラビアコート法、ロールコート法、ナイフコート法、シルクスクリーン印刷法、その他通常のコート法ないし印刷法で塗工後、該樹脂をエンボス加工することによって形成しても良い。 The unevenness forming layer 9 is formed by applying a thermosetting resin or an ultraviolet curable resin by a gravure printing method, a gravure coating method, a roll coating method, a knife coating method, a silk screen printing method, or other ordinary coating methods or printing methods. Then, you may form by embossing this resin.
各層を上記のように積層して、図１に示すような加飾箔７と凹凸模様賦形箔１０が準備できる。加飾箔７の第二の接着層６と、凹凸模様賦形箔１０の凹凸形成層９の無いほうの面を対向させた状態で、この２枚の箔を接着し、インモールド用転写箔１１を形成することができる（図２参照）。このとき、加飾箔７の印刷層４の模様と、凹凸模様賦形箔１０の凹凸形成層９の凹凸パターンを位置合わせした状態で接着するようにしておく。 By laminating each layer as described above, a decorative foil 7 and a concavo-convex shaped shaping foil 10 as shown in FIG. 1 can be prepared. In a state where the second adhesive layer 6 of the decorative foil 7 and the surface of the concavo-convex pattern shaping foil 10 on which the concavo-convex forming layer 9 is not provided are opposed to each other, the two foils are bonded to each other, and an in-mold transfer foil 11 can be formed (see FIG. 2). At this time, the pattern of the printed layer 4 of the decorative foil 7 and the concavo-convex pattern of the concavo-convex forming layer 9 of the concavo-convex pattern shaping foil 10 are bonded in a aligned state.
あるいは、加飾箔７の第二の接着層６と、凹凸模様賦形箔１０の凹凸形成層９があるほうの面を対向させた状態で、この２枚の箔を接着してもよい（図３参照）。このとき、加飾箔７の印刷層４の模様と、凹凸模様賦形箔１０の凹凸形成層９の凹凸パターンを位置合わせした状態で接着するようにしておく。 Alternatively, the two foils may be bonded in a state where the second adhesive layer 6 of the decorative foil 7 and the surface having the concave / convex forming layer 9 of the concave / convex pattern shaping foil 10 are opposed to each other ( (See FIG. 3). At this time, the pattern of the printed layer 4 of the decorative foil 7 and the concavo-convex pattern of the concavo-convex forming layer 9 of the concavo-convex pattern shaping foil 10 are bonded in a aligned state.
上記のように接着することにより、図２に示すようなインモールド用転写箔１１、または図３に示すようなインモールド用転写箔２１が準備できる。これらのインモールド用転写箔を用いて、インモールド射出成形することにより、印刷層４の模様と合致した表面凹凸を有する成形品を製造することができる。 By bonding as described above, an in-mold transfer foil 11 as shown in FIG. 2 or an in-mold transfer foil 21 as shown in FIG. 3 can be prepared. By using in-mold injection molding using these in-mold transfer foils, a molded product having surface irregularities that matches the pattern of the printed layer 4 can be produced.
インモールド用転写箔１１、または、インモールド用転写箔２１は、射出成形時に圧力をかけられることによって、凹凸形成層９の凸になっている部分が、加飾箔７を押し上げて変形させる。これによって、凹凸形成層９の凹凸パターンと同じ凹凸が、出来上がった成形品の表面に形成されることになる。 When the in-mold transfer foil 11 or the in-mold transfer foil 21 is pressed during injection molding, the convex portion of the concavo-convex forming layer 9 pushes the decorative foil 7 and deforms it. As a result, the same unevenness as the uneven pattern of the unevenness forming layer 9 is formed on the surface of the finished molded product.
本発明のインモールド用転写箔１１、または、インモールド用転写箔２１を使ったインモールド射出成形の概要について、図４〜５を使って説明する。
本発明のインモールド用転写箔を射出成形用金型１３内へ挿入し、該インモールド用転写箔の第一の接着層５側から該射出成形用金型１３のキャビティ内へ成形樹脂１２を射出成形することで、該成形樹脂１２の表面にインモールド用転写箔を転写する。冷却後、射出成形用金型１３を開放し、インモールド用転写箔の第一のベースフィルム１および剥離層２および凹凸模様賦形箔１０を剥離して、成形品を取り出すという公知の順序で行うことができる。
An outline of in-mold injection molding using the in-mold transfer foil 11 or the in-mold transfer foil 21 of the present invention will be described with reference to FIGS.
The in-mold transfer foil of the present invention is inserted into the injection mold 13 and the molding resin 12 is injected into the cavity of the injection mold 13 from the first adhesive layer 5 side of the in-mold transfer foil. The in-mold transfer foil is transferred onto the surface of the molding resin 12 by injection molding. After cooling, the injection mold 13 is opened, the first base film 1 and the release layer 2 and the concavo-convex pattern shaping foil 10 of the in-mold transfer foil are peeled off, and the molded product is taken out in a known order. It can be carried out.
この方法で射出成形用金型１３のキャビティ内へ成形樹脂１２を射出成形し、インモールド用転写箔に圧力をかける。このとき、インモールド用転写箔の凹凸形成層９の凸部分を形成する樹脂の厚みにより、その部分の加飾箔７が押し上げられて変形し、さらに成形樹脂１２も同様に変形する。（図４参照） By this method, the molding resin 12 is injection molded into the cavity of the injection mold 13 and pressure is applied to the in-mold transfer foil. At this time, depending on the thickness of the resin that forms the convex portion of the concave-convex forming layer 9 of the in-mold transfer foil, the decorative foil 7 of that portion is pushed up and deformed, and the molding resin 12 is similarly deformed. (See Figure 4)
凹凸模様賦形箔１０および第一のベースフィルム１および剥離層２を剥離すると、最外表面となるハードコート層３表面には、凹凸形成層９の凹凸パターンと同じ凹凸が形成されている。これにより、出来上がった成形品の表面には凹凸が形成されることになる（図５参照）。 When the concavo-convex shaped shaping foil 10, the first base film 1 and the release layer 2 are peeled, the same concavo-convex as the concavo-convex pattern of the concavo-convex forming layer 9 is formed on the surface of the hard coat layer 3 which is the outermost surface. Thereby, irregularities are formed on the surface of the finished molded product (see FIG. 5).
（実施例１）
第一のベースフィルム１としてポリエチレンテレフタレート樹脂フィルムを用い、第一のベースフィルム１上にメラミン樹脂系剥離層２、紫外線硬化性のアクリル樹脂系ハードコート層３を形成した後、印刷層４として塩化酢酸ビニル／ウレタン系インキ、第一の接着層５としてアクリル系樹脂をグラビア印刷法にて形成した。次に、該ベースフィルム１の剥離層２が形成されているのと反対側の面に、第二の接着層６として、二液硬化型のポリエステル系樹脂を塗工して、加飾箔７を得た。
Example 1
A polyethylene terephthalate resin film is used as the first base film 1, a melamine resin release layer 2 and an ultraviolet curable acrylic resin hard coat layer 3 are formed on the first base film 1, and then the printing layer 4 is chlorinated. An acrylic resin was formed as a vinyl acetate / urethane ink and a first adhesive layer 5 by a gravure printing method. Next, a two-component curable polyester resin is applied as a second adhesive layer 6 to the surface of the base film 1 opposite to the side where the release layer 2 is formed. Got.
続いて、第二のベースフィルム８の一方の面に、凹凸形成層９として、グラビア印刷法にて紫外線硬化性のアクリル系樹脂を塗工し、エンボス加工によって凹凸を形成した後に、凹凸形成層９側から高圧水銀灯を用いて積算光量１０００ｍＪ／ｃｍ２の紫外線を照射し、凹凸形成層９を硬化させることで、凹凸模様賦形箔１０を得た。 Subsequently, an ultraviolet curable acrylic resin is applied to one surface of the second base film 8 as a concavo-convex forming layer 9 by a gravure printing method, and the concavo-convex forming layer is formed by embossing. The concavo-convex pattern shaping foil 10 was obtained by irradiating the concavo-convex forming layer 9 by irradiating ultraviolet rays with an integrated light quantity of 1000 mJ / cm 2 using a high-pressure mercury lamp from the 9 side.
次に、加飾箔７の第二の接着層６と、凹凸模様賦形箔１０の凹凸形成層９の無いほうの面を対向させた状態で、この２枚の箔を接着してインモールド用転写箔１１を得た。 Next, in a state where the second adhesive layer 6 of the decorative foil 7 and the surface of the concavo-convex pattern shaping foil 10 that does not have the concavo-convex forming layer 9 are opposed to each other, the two foils are bonded to each other in-mold. Transfer foil 11 was obtained.
該インモールド用転写箔１１を射出成形用金型１３に固定して型締めして、成形樹脂１２としてＰＣ／ＡＢＳ樹脂を使用し射出成形した。冷却後、射出成形用金型１３を開放し、該インモールド用転写箔１１の第一のベースフィルム１および凹凸模様賦形箔１０を剥離層２とともに成形品から剥離した後、成形品の表面に高圧水銀灯を用いて、積算光量１０００ｍＪ／ｃｍ２の紫外線を照射し、ハードコート層３を架橋硬化させた。
以上により、表面に凹凸を有し、且つ、表面硬度の高い成形品を得た。
The in-mold transfer foil 11 was fixed to an injection mold 13 and clamped, and injection molding was performed using a PC / ABS resin as the molding resin 12. After cooling, the injection mold 13 is opened, and the first base film 1 and the concavo-convex pattern shaping foil 10 of the in-mold transfer foil 11 are peeled from the molded product together with the release layer 2, and then the surface of the molded product The hard coat layer 3 was cross-linked and cured by irradiating ultraviolet rays with an integrated light quantity of 1000 mJ / cm 2 using a high pressure mercury lamp.
As a result, a molded article having irregularities on the surface and high surface hardness was obtained.
（比較例１）
実施例１と同様に、第二のベースフィルム８の一方の面に、凹凸形成層９として、グラビア印刷法にて紫外線硬化性のアクリル系樹脂を塗工し、エンボス加工によって凹凸を形成した後に、凹凸形成層９側から高圧水銀灯を用いて積算光量４００ｍＪ／ｃｍ２の紫外線を照射し、凹凸模様賦形箔１０を得た。次いで、実施例１と同様にしてインモールド用転写箔を得た後に、射出成形によって成形品を得た。この後の剥離工程、成形品表面への紫外線照射工程も、実施例１と同様である。
(Comparative Example 1)
As in Example 1, after applying an ultraviolet curable acrylic resin by the gravure printing method to the one surface of the second base film 8 as the concavo-convex forming layer 9, and forming the concavo-convex by embossing Then, ultraviolet rays having an integrated light quantity of 400 mJ / cm 2 were irradiated from the unevenness forming layer 9 side using a high-pressure mercury lamp to obtain an uneven pattern shaping foil 10. Next, after obtaining a transfer foil for in-mold as in Example 1, a molded product was obtained by injection molding. The subsequent peeling process and the ultraviolet irradiation process on the surface of the molded product are the same as in the first embodiment.
（比較例２）
実施例１と同様に、第二のベースフィルム８の一方の面に、凹凸形成層９として、グラビア印刷法にて、熱可塑性の塩化ビニル系樹脂を塗工し、エンボス加工によって凹凸を形成し、凹凸模様賦形箔１０を得た。次いで、実施例１と同様にして、インモールド用転写箔を得た後に、射出成形によって成形品を得た。この後の剥離工程、成形品表面への紫外線照射工程も、実施例１と同様である。
(Comparative Example 2)
As in Example 1, a thermoplastic vinyl chloride resin is applied to one surface of the second base film 8 as a concavo-convex forming layer 9 by a gravure printing method, and concavo-convex is formed by embossing. The concavo-convex shaped shaping foil 10 was obtained. Next, in the same manner as in Example 1, after obtaining a transfer foil for in-mold, a molded product was obtained by injection molding. The subsequent peeling process and the ultraviolet irradiation process on the surface of the molded product are the same as in the first embodiment.
（評価）
上記実施例１および比較例１〜２で得られた成形品について、
（１）凹凸模様賦形箔１０によって形成された成形品表面の凹凸感
（２）印刷層４と、凹凸模様賦形箔１０によって得られた凹凸模様の位置の合致
を評価した。
凹凸感の評価は、成形品の表面を０．５ｍ離れた場所から目視して、表面の凹凸が認識できるものを○（良）、認識できないものを×（不良）とした。
また、印刷層との位置の合致の評価も、同様に、成形品の表面を０．５ｍ離れた場所から目視して、位置が一致しているものは○（良）、一致していないものは×（不良）として評価した。
これらの評価結果を下記表１に示す。
(Evaluation)
About the molded products obtained in Example 1 and Comparative Examples 1-2 above,
(1) Concavity and convexity on the surface of the molded product formed by the uneven pattern shaping foil 10 (2) The coincidence of the printed layer 4 and the position of the uneven pattern obtained by the uneven pattern shaping foil 10 was evaluated.
The evaluation of the unevenness was evaluated by visually observing the surface of the molded product from a location 0.5 m away, and indicating that the surface unevenness was recognizable as ◯ (good) and unrecognizable as x (defective).
Similarly, in the evaluation of the position match with the printed layer, when the surface of the molded product is visually observed from a place 0.5 m away, the position matches is ○ (good), and the position does not match Was evaluated as x (defect).
The evaluation results are shown in Table 1 below.
比較例１の凹凸模様賦形箔１０の凹凸形成層９は紫外線照射量不足で硬化が不十分であるため、また、比較例２の凹凸模様賦形箔１０の凹凸形成層９は熱可塑性樹脂を用いているため、ともに射出成形時の熱と圧力で凹凸形成層９の凹凸がほぼ平らになってしまう。そのため、成形品表面の凹凸が形成されなかったものと考えられる。 Since the concavo-convex forming layer 9 of the concavo-convex pattern shaping foil 10 of Comparative Example 1 is insufficiently cured due to insufficient UV irradiation, the concavo-convex forming layer 9 of the concavo-convex pattern shaping foil 10 of Comparative Example 2 is a thermoplastic resin. Therefore, the unevenness of the unevenness forming layer 9 becomes almost flat due to heat and pressure during injection molding. Therefore, it is considered that the unevenness on the surface of the molded product was not formed.
一方、実施例１のように凹凸模様賦形箔１０の凹凸形成層９が十分な硬度を有していれば、射出成形時の熱と圧力でも凹凸形成層９の凹凸は崩れず、成形品表面に凹凸を形成できることが確認できた。 On the other hand, if the concavo-convex forming layer 9 of the concavo-convex pattern shaping foil 10 has sufficient hardness as in Example 1, the concavo-convex of the concavo-convex forming layer 9 does not collapse even with heat and pressure during injection molding, and the molded product It was confirmed that irregularities could be formed on the surface.
本発明の転写箔は、家電製品、住宅機器、事務機器、自動車部品などに利用されるパネル部材等の加飾に用いることが可能である。 The transfer foil of the present invention can be used for decoration of panel members and the like used for home appliances, housing equipment, office equipment, automobile parts and the like.
１…第一のベースフィルム
２…剥離層
３…ハードコート層
４…印刷層
５…第一の接着層
６…第二の接着層
７…加飾箔
８…第二のベースフィルム
９…凹凸形成層
１０…凹凸模様賦形箔
１１…インモールド用転写箔
１２…成形樹脂
１３…射出成形用金型
２１…インモールド用転写箔
DESCRIPTION OF SYMBOLS 1 ... 1st base film 2 ... Release layer 3 ... Hard-coat layer 4 ... Print layer 5 ... 1st adhesive layer 6 ... 2nd adhesive layer 7 ... Decorating foil 8 ... 2nd base film 9 ... Unevenness formation Layer 10 ... Uneven pattern forming foil 11 ... In-mold transfer foil 12 ... Molding resin 13 ... Injection mold 21 ... In-mold transfer foil
Claims (4)
第二のベースフィルムの一方の面に、熱硬化性樹脂または紫外線硬化性樹脂からなる凹凸形成層を有している凹凸模様賦形箔と、を、
前記加飾箔の第二の接着層と前記凹凸模様賦形箔の凹凸形成層が無いほうの面を対向させるようにして接着させていることを特徴とするインモールド用転写箔。 On one surface of the first base film, a release layer, a hard coat layer containing an ultraviolet curable resin, a printed layer having a predetermined pattern, and a first layer for adhering the printed layer to the surface of the molded product One decorative layer in this order, a decorative foil provided with a second adhesive layer containing a two-component curable resin on the other surface of the first base film,
A concavo-convex pattern shaping foil having a concavo-convex forming layer made of a thermosetting resin or an ultraviolet curable resin on one surface of the second base film,
A transfer foil for in-mold, wherein the second adhesive layer of the decorative foil and the surface having no concave-convex forming layer of the concave-convex pattern shaping foil are adhered to face each other.
第二のベースフィルムの一方の面に、熱硬化性樹脂または紫外線硬化性樹脂からなる凹凸形成層を有している凹凸模様賦形箔と、を、
前記加飾箔の第二の接着層と前記凹凸模様賦形箔の凹凸形成層を対向させるようにして接着させていることを特徴とするインモールド用転写箔。 On one surface of the first base film, a release layer, a hard coat layer containing an ultraviolet curable resin, a printed layer having a predetermined pattern, and a first layer for adhering the printed layer to the surface of the molded product One decorative layer in this order, a decorative foil provided with a second adhesive layer containing a two-component curable resin on the other surface of the first base film,
A concavo-convex pattern shaping foil having a concavo-convex forming layer made of a thermosetting resin or an ultraviolet curable resin on one surface of the second base film,
A transfer foil for in-mold, wherein the second adhesive layer of the decorative foil and the concavo-convex forming layer of the concavo-convex pattern shaping foil are adhered to face each other.
前記凹凸模様賦形箔および前記第一のベースフィルムおよび前記剥離層を、前記成形品の表面から剥離する剥離工程と、
前記成形品の表面に露出した前記ハードコート層に紫外線を照射して前記ハードコート層を硬化させる硬化工程と、を有することを特徴とする加飾成形品製造方法。 3. Molding in which a molding resin is injected onto the surface having the first adhesive layer of the in-mold transfer foil according to claim 1 and molded into a predetermined molded product shape by a mold, and then the mold is removed. Process,
A peeling step of peeling the concavo-convex pattern forming foil and the first base film and the release layer from the surface of the molded article;
And a curing step of curing the hard coat layer by irradiating the hard coat layer exposed on the surface of the molded article with ultraviolet rays.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012067096A JP2013199001A (en) | 2012-03-23 | 2012-03-23 | In-mold transfer foil, decorative molded article, and method of manufacturing decorative molded article |
| CN201320133259.4U CN203391497U (en) | 2012-03-23 | 2013-03-22 | Intramode transfer foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012067096A JP2013199001A (en) | 2012-03-23 | 2012-03-23 | In-mold transfer foil, decorative molded article, and method of manufacturing decorative molded article |
Publications (1)
| Publication Number | Publication Date |
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| JP2013199001A true JP2013199001A (en) | 2013-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012067096A Pending JP2013199001A (en) | 2012-03-23 | 2012-03-23 | In-mold transfer foil, decorative molded article, and method of manufacturing decorative molded article |
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| Country | Link |
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| JP (1) | JP2013199001A (en) |
| CN (1) | CN203391497U (en) |
Cited By (5)
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| WO2015072119A1 (en) * | 2013-11-18 | 2015-05-21 | 凸版印刷株式会社 | Transfer film for in-mold molding and molded article using same |
| KR20150116564A (en) * | 2014-04-07 | 2015-10-16 | 미래나노텍(주) | Pattern transfer film for injection and manufacturing method thereof |
| JP2016190332A (en) * | 2015-03-30 | 2016-11-10 | 大日本印刷株式会社 | Transfer sheet and decorative resin molding using the same |
| WO2018151257A1 (en) * | 2017-02-16 | 2018-08-23 | 大日本印刷株式会社 | Releasing member-integrated transfer sheet, and method for manufacturing said transfer sheet and printed matter |
| JP2018144235A (en) * | 2017-03-01 | 2018-09-20 | 大日本印刷株式会社 | Transfer sheet for three-dimensional molding and method for producing decorative resin molding |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105313384A (en) * | 2014-06-16 | 2016-02-10 | 黄瑜贞 | Light guide decorative composite sheet and part thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015072119A1 (en) * | 2013-11-18 | 2015-05-21 | 凸版印刷株式会社 | Transfer film for in-mold molding and molded article using same |
| JP2015098095A (en) * | 2013-11-18 | 2015-05-28 | 凸版印刷株式会社 | Transfer film for in-mold molding, and molded object using the same |
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| JP2016190332A (en) * | 2015-03-30 | 2016-11-10 | 大日本印刷株式会社 | Transfer sheet and decorative resin molding using the same |
| WO2018151257A1 (en) * | 2017-02-16 | 2018-08-23 | 大日本印刷株式会社 | Releasing member-integrated transfer sheet, and method for manufacturing said transfer sheet and printed matter |
| JPWO2018151257A1 (en) * | 2017-02-16 | 2019-04-11 | 大日本印刷株式会社 | Release member-integrated transfer sheet, method for producing printed matter, method for producing transfer sheet, and print system |
| JP2019073026A (en) * | 2017-02-16 | 2019-05-16 | 大日本印刷株式会社 | Release member-integrated type transfer sheet, manufacturing method of printed matter, manufacturing method of transfer sheet and print system |
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| US11987040B2 (en) | 2017-02-16 | 2024-05-21 | Dai Nippon Printing Co., Ltd. | Releasing member-integrated transfer sheet, method for producing print, method for producing transfer sheet, and print system |
| JP2018144235A (en) * | 2017-03-01 | 2018-09-20 | 大日本印刷株式会社 | Transfer sheet for three-dimensional molding and method for producing decorative resin molding |
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