JP2019018436A - Processing method of carton base material - Google Patents
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Abstract
Description
本発明は、表面の樹脂層に凹凸を形成してマット感の付与されたカートン基材の加工方法（凹凸形成方法）に関する。 The present invention relates to a processing method (unevenness forming method) for a carton base material in which unevenness is formed on a resin layer on a surface to give a matte feeling.
紙容器向けに用いられるカートン基材では、各種目的に応じた表面加工（外装）が施される。 In carton base materials used for paper containers, surface processing (exterior) according to various purposes is performed.
製品の説明書き（製品名，内容物，製造元）に加えて、アイキャッチ効果や装飾性向上を実現するための印刷層上にも、印刷層の保護，ガスバリア性・耐水性・耐薬品性・耐光性・機械的強度などの他、更なる装飾性（光沢感，マット感）を付与する目的で、樹脂層（フィルム）をラミネートした上で、鏡面加工やエンボス加工が必要に応じて追加される。 In addition to product descriptions (product name, contents, manufacturer), on the printed layer to achieve eye-catching effects and improved decorativeness, protection of the printed layer, gas barrier properties, water resistance, chemical resistance, In addition to light resistance, mechanical strength, etc., mirror surface processing and embossing processing are added as necessary after laminating a resin layer (film) for the purpose of giving further decorative properties (glossiness, matte feeling). The
表面光沢仕上げでフィルムラミネート法を採用する場合には、意匠性のほか耐磨耗性などの物性は優れるものの価格面で問題があり、グロスニスを表面に塗布する方法を採用する場合には、価格面では優位性は認められるものの耐摩耗性が劣るという問題がある。 When the film laminating method is used for the surface gloss finish, the physical properties such as wear resistance as well as the design properties are excellent, but there is a problem with the price. When the method of applying gloss varnish to the surface is used, the price is In terms of surface, there is a problem that the wear resistance is inferior although superiority is recognized.
コストと物性のバランスを考慮した手法として、プレスコート加工が有望視されている。
プレスコート加工は、基材にニスを塗布した後、このニスを加熱軟化させ、表面が鏡面のフェロ板を押圧して光沢仕上げする方法であり、価格と耐磨耗性など物性面のバランスが取れており広く用いられているが、例えば１６０℃程度の高温に加熱して押圧するため、アルミニウム箔を積層したアルミホイル紙や、アルミニウム蒸着フィルムを積層したアルミニウム蒸着紙を基材として使おうとする場合には、割れが発生するために使用できないとされてきた。
As a method considering the balance between cost and physical properties, press coating is considered promising.
Press coating is a method in which a varnish is applied to a substrate, and then the varnish is heated and softened, and a glossy finish is applied by pressing a ferro-plate with a mirror surface. The balance of physical properties such as price and wear resistance is balanced. Although it is taken and widely used, for example, to heat and press at a high temperature of about 160 ° C., an aluminum foil paper laminated with an aluminum foil or an aluminum vapor deposited paper laminated with an aluminum vapor deposited film is used as a base material. In some cases, it has been considered unusable due to cracking.
一方、カートン基材に表裏印刷を行なう際のブロッキング防止の目的などでマット感（艶消し感）を付与する上で、微細凹凸を形成する表面加工に対する要求もあり、マットコート剤の添加されたマットコート層を設けることも行なわれているが、ヒートシール工程においてマットコート層がヒートシールバー側に移行されない耐熱性および筆記適性を付与する上で好適なシリカ系マットコート剤の添加された塩化ビニル・酢酸ビニル共重合樹脂／アクリルポリオール混合樹脂からなるマットコート層（ＸＥＬ筆記ＯＰニス）を形成する手法の食品用包材への適用に係る提案も公知である。（特許文献１参照）
以下、本願明細書においては、シリカ系マットコート剤の添加された上記マットコート層をマットビニルと称する。
On the other hand, in order to give a mat feeling (matte feeling) for the purpose of preventing blocking when performing front and back printing on a carton substrate, there is also a demand for surface processing to form fine irregularities, and a mat coating agent was added. Although a mat coat layer is also provided, chlorination with the addition of a silica-based mat coat agent suitable for imparting heat resistance and writing suitability so that the mat coat layer is not transferred to the heat seal bar side in the heat sealing step. A proposal relating to the application of a technique for forming a mat coat layer (XEL writing OP varnish) composed of a vinyl / vinyl acetate copolymer resin / acrylic polyol mixed resin to a food packaging material is also known. (See Patent Document 1)
Hereinafter, in the present specification, the mat coat layer to which the silica-based mat coat agent is added is referred to as mat vinyl.
マットビニル処理(加工)はニス引き(印刷)によってなされるため、印刷箇所の全面で一様（ベタ）な凹凸形成である。 Since the mat vinyl treatment (processing) is performed by varnishing (printing), uniform unevenness is formed on the entire surface of the printed portion.
カートン基材に形成したマットビニル下層の印刷層との同調など、マットビニルに局所的・選択的な凹凸を形成するなどして、マットビニル表面に更なる装飾加工を施す要求もあり、マットコート剤の粒系に依存するサイズ・深さの凹凸を上回る凹凸からなる絵柄，模様をカートン基材に形成するにあたっては、マットビニル形成後に、所望の凹凸模様を表面に有するスタンパを用いた押圧加工（エンボス成形）が必要となっている。 There is also a need for further decoration processing on the surface of the mat vinyl by forming local and selective irregularities on the mat vinyl, such as in synchronization with the printing layer of the mat vinyl lower layer formed on the carton substrate. When forming a pattern or pattern with irregularities exceeding the irregularities of the size and depth depending on the particle system of the agent on the carton substrate, press processing using a stamper with the desired irregular pattern on the surface after forming the mat vinyl (Embossing) is required.
当然に、スタンパの準備，後加工の追加では、コストアップ，プロセスの増加を伴うこととなる。 Naturally, the preparation of a stamper and the addition of post-processing are accompanied by an increase in cost and an increase in processes.
本発明は、スタンパを用いた押圧加工（エンボス成形）のプロセス追加を要さず、マットビニル面の全面ベタな凹凸とは異なる局所的・選択的な凹凸模様を追加形成し、カートン基材の装飾性，意匠性，アイキャッチ効果，セキュリティ性の付与が簡便に行なえる手法を提案することを目的とする。 The present invention does not require an additional press working (embossing) process using a stamper, and additionally forms a local / selective concavo-convex pattern different from the solid solid concavo-convex pattern on the mat vinyl surface. The purpose is to propose a method that can easily add decoration, design, eye-catching effect, and security.
上記課題を解決する目的で為された本発明によるカートン基材の加工方法は、
板紙表面に金属光沢層を介して塗布形成された熱可塑性樹脂層を有するカートン基材をオーブンユニット内に搬送して加熱する際、熱風，赤外線の少なくとも何れかを発生する加熱源とカートン基材との間に、熱風または赤外線の照射量を選択的に制御する部材を熱可塑性樹脂層には非接触に配置した状態でカートン基材を加熱する工程を具備することを特徴とする。
上記加工方法においては、熱風または赤外線の照射量を選択的に制御する部材が、グラスファイバーによる格子状のメッシュを有することが好ましい。
The carton substrate processing method according to the present invention made for the purpose of solving the above problems is as follows.
A heating source and a carton base material that generate at least one of hot air and infrared rays when a carton base material having a thermoplastic resin layer coated and formed on the surface of the paperboard is conveyed into an oven unit and heated. And a step of heating the carton substrate in a state where a member for selectively controlling the irradiation amount of hot air or infrared rays is disposed in a non-contact manner on the thermoplastic resin layer.
In the said processing method, it is preferable that the member which selectively controls the irradiation amount of a hot air or infrared rays has the grid | lattice-like mesh by glass fiber.
オーブンユニット内では、搬送されたカートン基材が静止した状態での加熱処理を施すことにより、凹凸模様を追加形成しても良い。 In the oven unit, a concavo-convex pattern may be additionally formed by performing a heat treatment in a state where the conveyed carton substrate is stationary.
カートン基材が静止せずにオーブンユニット内を搬送される加熱処理が選択される場合は、熱風または赤外線の照射量を選択的に制御する部材が、カートン基材の搬送と同期して移動する加工方法を採用しても良い。 When the heat treatment in which the carton base material is transported through the oven unit without being stationary is selected, the member that selectively controls the irradiation amount of hot air or infrared rays moves in synchronization with the transport of the carton base material. A processing method may be adopted.
本発明により、スタンパを用いた押圧加工（エンボス成形）のプロセス追加を要さず、マットビニル面の全面ベタな凹凸とは異なる局所的・選択的な凹凸模様を追加形成し、カートン基材の装飾性，意匠性，アイキャッチ効果，セキュリティ性の付与が簡便に行なうことが可能となり、コスト面での優位性が確保される。 According to the present invention, there is no need to add a pressing process (embossing) using a stamper, and a local and selective uneven pattern different from the entire solid uneven surface of the mat vinyl surface is additionally formed. Decoration, design, eye-catching effect, and security can be easily provided, and cost advantages are ensured.
以下、本発明の実施形態について、図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
尚、本発明は実施形態で図示・説明される構成に限定されるものではなく、主旨を逸脱しない範囲で適宜の変更が可能である。 Note that the present invention is not limited to the configuration shown and described in the embodiment, and appropriate modifications can be made without departing from the spirit of the present invention.
本発明で加飾を施す対象とするカートン基材は、板紙表面に少なくとも金属光沢層，熱可塑性樹脂層（マットビニル層）が積層されてなる構成であり、図１（ａ）に示す例では、同図下側から、板紙／金属光沢層（アルミニウム箔，アルミニウム蒸着フィルム）／マットビニル層からなる層構成である。
マットビニル層は、シリカ系マットコート剤の添加された塩化ビニル・酢酸ビニル共重合樹脂／アクリルポリオール混合樹脂からなるマットコート層（ニス）が塗布されてなる。
The carton substrate to be decorated in the present invention has a structure in which at least a metallic luster layer and a thermoplastic resin layer (matt vinyl layer) are laminated on the surface of the paperboard. In the example shown in FIG. From the lower side of the figure, it is a layer structure consisting of paperboard / metallic luster layer (aluminum foil, aluminum vapor deposition film) / matte vinyl layer.
The mat vinyl layer is formed by applying a mat coat layer (varnish) made of a vinyl chloride / vinyl acetate copolymer resin / acrylic polyol mixed resin to which a silica-based mat coat agent is added.
図１（ｂ）に示す例では、同図下側から、板紙／金属光沢層（金インキまたは銀インキが塗布されてなるシート基材）／印刷層／マットビニル層からなる層構成である。
印刷層には、製品の説明書き（製品名，内容物，製造元）に加えて、アイキャッチ効果や装飾性向上を実現するための印刷絵柄が、光沢層上に直接あるいは何らの層（印刷対象となる紙，樹脂などのシート表面に印刷されて）を介して形成されている。
マットビニル層は、図１（ａ）と同じ構成である。
In the example shown in FIG. 1B, from the lower side of the figure, the layer structure is composed of paperboard / metallic luster layer (sheet base material coated with gold ink or silver ink) / printing layer / matte vinyl layer.
In addition to the product description (product name, contents, manufacturer), the printed layer is printed directly on the glossy layer or any layer (print target) to achieve an eye-catching effect and improved decorativeness. Printed on the surface of a sheet of paper, resin, or the like.
The mat vinyl layer has the same configuration as that shown in FIG.
図１（ａ）（ｂ）の実施形態では、印刷層の有無に応じて、金属箔，金属蒸着層，メタリックなインキ層の形態が選択されるものでもなく、金属光沢層はマットビニル層に追加形成される凹凸模様の視認性を向上する上で有効であり、その形態は適宜に選定される。 In the embodiment of FIGS. 1 (a) and 1 (b), the form of the metal foil, the metal vapor deposition layer, and the metallic ink layer is not selected depending on the presence or absence of the printing layer, and the metallic gloss layer is a mat vinyl layer. This is effective in improving the visibility of the additionally formed uneven pattern, and its form is appropriately selected.
加えて、最終製品の外装／内装の用途別，表示の要否などに応じて、印刷層も必須な構成ではなく、板紙に設ける形態もあるなど、適宜に形成される。 In addition, according to the exterior / interior use of the final product, the necessity of display, and the like, the printing layer is not an indispensable configuration, and may be appropriately formed, for example, in a form provided on paperboard.
本発明においては、図１最上層のマットビニル層（マットコート剤の添加により、塗布面の全面に一様な微細凹凸が形成されている）の表面に、局所的・選択的に微細凹凸よりもサイズ・深さの大きい凹凸（エンボス）模様を形成することが主要な特徴であり、マットビニル層形成後の別工程におけるスタンパを用いた押圧成形によらず、マットビニル層形成（ニス引き）後の乾燥プロセス時に、凹凸（エンボス）模様の形成を同時に行なうことが本発明に固有である。
マットビニル層の形成前の状態にあるカートン基材にマットビニル層（ニス）を塗布形成するにあたっては、通常の印刷機械やコーティング機を用いて塗布すれば良く、その形成方法は限定されるものではない。
マットビニル層形成にあたっては、アンカー層を介して形成すると、カートン基材へのマットビニル層の密着強度が向上し、ムラなく全面に形成可能となる利点もあるが、アンカー層の形成は必須ではない。アンカー層は、板紙やマットビニル層との密着性，組成に基づく化学反応，塗布適性などを考慮して選定される。
次いで、マットビニル層が塗布形成されたカートン基材をオーブンユニット内に搬送し、マットビニル層を乾燥させる。
マットビニル層をオーブンユニット内で加熱する際、熱風，赤外線の少なくとも何れかを発生する加熱源とカートン基材との間に、熱風または赤外線の照射量を選択的に制御する部材を熱可塑性樹脂層には非接触に配置した状態でカートン基材を加熱する。
熱風または赤外線の照射量を選択的に制御する部材としては、グラスファイバーによる格子状のメッシュを有するシート状部材が採用される。
図２は、本発明によるカートン基材の加工方法の概要を示す説明図であり、オーブンユニット内でのカートン基材の加熱乾燥工程を示す。
オーブンユニット１０内に搬送されるカートン基材１に対して、加熱源１１から照射される熱風，赤外線の少なくとも何れかにより、マットビニル層が加熱乾燥される。
加熱源１１とカートン基材１との間には、熱風または赤外線の照射量を選択的に制御するシート状部材１２が配置されており、マットビニル層表面への熱風または赤外線の照射量に、シート状部材１２に形成された開口パターン１３に応じた変調が加えられる。
In the present invention, the surface of the uppermost mat vinyl layer in FIG. 1 (uniform fine irregularities are formed on the entire coated surface by the addition of the mat coating agent) is locally and selectively applied to the fine irregularities. The main feature is the formation of an uneven pattern with large size and depth (embossed pattern). Matte vinyl layer formation (varnishing) regardless of press molding using a stamper in a separate process after formation of the mat vinyl layer It is inherent to the present invention that the concavo-convex pattern is simultaneously formed during the subsequent drying process.
When a mat vinyl layer (varnish) is applied and formed on a carton substrate in a state before the formation of the mat vinyl layer, it may be applied using a normal printing machine or coating machine, and the formation method is limited. is not.
In forming the mat vinyl layer, the adhesion strength of the mat vinyl layer to the carton substrate is improved by forming it through the anchor layer, and there is an advantage that it can be formed over the entire surface, but the formation of the anchor layer is indispensable. Absent. The anchor layer is selected in consideration of adhesion to the paperboard or mat vinyl layer, chemical reaction based on the composition, application suitability, and the like.
Next, the carton substrate on which the mat vinyl layer has been applied is conveyed into the oven unit, and the mat vinyl layer is dried.
When the mat vinyl layer is heated in the oven unit, a thermoplastic resin is used as a member for selectively controlling the amount of hot air or infrared radiation between the heating source that generates at least one of hot air and infrared rays and the carton substrate. The carton substrate is heated in a non-contact arrangement with the layer.
As a member for selectively controlling the amount of hot air or infrared radiation, a sheet-like member having a lattice mesh made of glass fibers is employed.
FIG. 2 is an explanatory view showing an outline of a method for processing a carton substrate according to the present invention, and shows a heating and drying process of the carton substrate in an oven unit.
The mat vinyl layer is heated and dried by at least one of hot air and infrared rays irradiated from the heating source 11 with respect to the carton substrate 1 conveyed into the oven unit 10.
Between the heating source 11 and the carton substrate 1, a sheet-like member 12 for selectively controlling the amount of hot air or infrared rays is disposed, and the amount of hot air or infrared rays applied to the surface of the mat vinyl layer is Modulation is applied according to the opening pattern 13 formed in the sheet-like member 12.
未乾燥で適度な厚さ，粘性を備えるマットビニル層に、前記部材を通過した熱風または赤外線がメッシュの開口パターンに応じた照射量の分布を持って照射されることにより、マットビニル層表面では、微視的に乾燥収縮の開始時間差や程度差が局所的に生じることで、従来のエンボス工程（別工程）で付与していた特殊な加熱・加圧条件を施すことなく、オーブンユニット内での乾燥処理と同時に、メッシュの開口パターンに応じた凹凸形状がマットビニル層に転移される。 On the mat vinyl layer surface, hot air or infrared rays that have passed through the member are irradiated with an irradiation amount distribution according to the opening pattern of the mesh on the mat vinyl layer having an appropriate thickness and viscosity. In the oven unit, microscopically, there is a difference in the start time and degree of drying shrinkage locally, without applying the special heating and pressurizing conditions that were applied in the conventional embossing process (separate process). Simultaneously with the drying process, the uneven shape corresponding to the opening pattern of the mesh is transferred to the mat vinyl layer.
熱風または赤外線の照射量を選択的に制御する部材が有するメッシュの開口パターンを変更して、マットビニル層に形成される凹凸形状を変更することも可能であり、更には、前記部材に意図的なパターンの開口を形成することにより、単なる凹凸ではない絵柄模様，文字パターンなどの形成も可能である。 It is possible to change the mesh opening pattern of the member that selectively controls the irradiation amount of hot air or infrared rays to change the uneven shape formed on the mat vinyl layer. By forming an opening with a simple pattern, it is possible to form not only a concavo-convex pattern, character pattern, etc.
オーブンユニット内では、加熱乾燥時にカートン基材と開口パターンとが相対的に移動しない状態を確保することが開口パターンの忠実な転移の上で有効であり、加熱源の下ではカートン基材が静止した状態で、乾燥と共に凹凸模様が形成されることが好ましい。オーブンユニット内でカートン基材が間欠的に静止せず搬送しながら加熱される場合には、熱風または赤外線の照射量を選択的に制御する部材が、カートン基材のコンベア搬送と同期して移動する装置構成の採用が望ましい。 In the oven unit, it is effective for the faithful transition of the opening pattern to ensure that the carton substrate and the opening pattern do not move relative to each other during heating and drying, and the carton substrate is stationary under the heating source. In this state, it is preferable that an uneven pattern is formed with drying. When the carton substrate is heated while it is not intermittently stationary in the oven unit, the member that selectively controls the amount of hot air or infrared radiation moves in synchronization with the conveyor conveyance of the carton substrate It is desirable to adopt an apparatus configuration.
●板紙：ブリリアンＳＢ（京王製紙製；１２μｍ厚，３１０ｇ／ｍ２）
●マットビニル：ＢＭ８５２（第一塗料製）
上記板紙の一方の表面に上記マットビニルを塗布形成し、オーブンユニット内で乾燥（および、凹凸（エンボス）付与）した後、打ち抜き〜ムシリ〜貼りのカートン製造工程を行なった。
●オーブン条件：１００℃，搬送速度＝５５ｍ／ｍｉｎ
● Paperboard: Brillien SB (manufactured by Keio Paper; 12 μm thick, 310 g / m 2 )
● Matte vinyl: BM852 (made by Daiichi Paint)
The mat vinyl was applied and formed on one surface of the paperboard, dried in an oven unit (and provided with unevenness (emboss)), and then subjected to a punching-mussel-pasting carton manufacturing process.
● Oven conditions: 100 ° C., conveyance speed = 55 m / min
＜比較例１＞
●板紙：ブリリアンＳＢ（京王製紙製；１２μｍ厚，３１０ｇ／ｍ２）
●マットビニル：ファインコート５０４（東京インキ製；マットコート剤の添加なし）
上記板紙の一方の表面に上記マットビニルを塗布形成し、オーブンユニット内で乾燥（および、凹凸（エンボス）付与）した後、打ち抜き〜ムシリ〜貼りのカートン製造工程を行なった。
●オーブン条件：１００℃，搬送速度＝５５ｍ／ｍｉｎ
<Comparative Example 1>
● Paperboard: Brillien SB (manufactured by Keio Paper; 12 μm thick, 310 g / m 2 )
● Matte vinyl: Fine coat 504 (manufactured by Tokyo Ink; no mat coat agent added)
The mat vinyl was applied and formed on one surface of the paperboard, dried in an oven unit (and provided with unevenness (emboss)), and then subjected to a punching-mussel-pasting carton manufacturing process.
● Oven conditions: 100 ° C., conveyance speed = 55 m / min
＜比較例２＞
オーブン条件を以下とした以外は、実施例１と同様にして製造工程を行なった。
●オーブン条件：８０℃，搬送速度＝４５ｍ／ｍｉｎ
実施例，比較例の評価結果を下記表１に示す。
<Comparative example 2>
The manufacturing process was performed in the same manner as in Example 1 except that the oven conditions were as follows.
● Oven conditions: 80 ° C, transport speed = 45m / min
The evaluation results of Examples and Comparative Examples are shown in Table 1 below.
実施例のみ、マットビニル表面にオーブンユニット内の搬送ローラーの表面形状が転移され、装飾効果，意匠効果の向上に寄与された。 Only in the examples, the surface shape of the transport roller in the oven unit was transferred to the surface of the mat vinyl, which contributed to the improvement of the decoration effect and the design effect.
１ カートン基材
１０ オーブンユニット
１１ 加熱源
１２ 熱風または赤外線の照射量を選択的に制御する部材
１３ 開口パターン
DESCRIPTION OF SYMBOLS 1 Carton base material 10 Oven unit 11 Heating source 12 Member 13 which selectively controls irradiation amount of hot air or infrared rays 13 Opening pattern
Claims (4)
板紙表面に金属光沢層を介して塗布形成された熱可塑性樹脂層を有するカートン基材をオーブンユニット内に搬送して加熱する際、熱風，赤外線の少なくとも何れかを発生する加熱源とカートン基材との間に、熱風または赤外線の照射量を選択的に制御する部材を熱可塑性樹脂層には非接触に配置した状態でカートン基材を加熱する工程を具備することを特徴とするカートン基材の加工方法。 A method for processing a carton base material, in which mat processing is performed on the surface of a thermoplastic resin layer of a carton base material on which at least a thermoplastic resin layer is laminated on a paperboard surface,
A heating source and a carton base material that generate at least one of hot air and infrared rays when a carton base material having a thermoplastic resin layer coated and formed on the surface of the paperboard is conveyed into an oven unit and heated. And a step of heating the carton base material in a state where a member for selectively controlling the amount of irradiation of hot air or infrared rays is disposed in a non-contact manner on the thermoplastic resin layer. Processing method.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911923A (en) * | 1972-05-11 | 1974-02-01 | ||
| JPS51128353A (en) * | 1975-04-30 | 1976-11-09 | Mitsubishi Rayon Co | Method of making stereoscopic* decorative board |
| JPH03224730A (en) * | 1989-12-12 | 1991-10-03 | Toppan Printing Co Ltd | Laminating material and container having difference of surface gloss |
| JP2004037522A (en) * | 2002-06-28 | 2004-02-05 | Hitachi Chem Co Ltd | Surface unevenness formation method, optical film and diffusion reflecting plate obtained by the method and diffusion reflecting plate production method |
| JP2006224977A (en) * | 2005-02-16 | 2006-08-31 | Toppan Printing Co Ltd | Preliminary heater of paper container for liquid, and heating quantity control method |
| JP2007290143A (en) * | 2006-04-21 | 2007-11-08 | Toppan Printing Co Ltd | Surface gloss decorating base material for liquid container, its processing method and surface gloss decorated container |
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2017
- 2017-07-14 JP JP2017137856A patent/JP6946798B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911923A (en) * | 1972-05-11 | 1974-02-01 | ||
| JPS51128353A (en) * | 1975-04-30 | 1976-11-09 | Mitsubishi Rayon Co | Method of making stereoscopic* decorative board |
| JPH03224730A (en) * | 1989-12-12 | 1991-10-03 | Toppan Printing Co Ltd | Laminating material and container having difference of surface gloss |
| JP2004037522A (en) * | 2002-06-28 | 2004-02-05 | Hitachi Chem Co Ltd | Surface unevenness formation method, optical film and diffusion reflecting plate obtained by the method and diffusion reflecting plate production method |
| JP2006224977A (en) * | 2005-02-16 | 2006-08-31 | Toppan Printing Co Ltd | Preliminary heater of paper container for liquid, and heating quantity control method |
| JP2007290143A (en) * | 2006-04-21 | 2007-11-08 | Toppan Printing Co Ltd | Surface gloss decorating base material for liquid container, its processing method and surface gloss decorated container |
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