JP2013071342A - Insert decorative sheet for polypropylene-based resin injection-molded article - Google Patents
Insert decorative sheet for polypropylene-based resin injection-molded article Download PDFInfo
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- JP2013071342A JP2013071342A JP2011212683A JP2011212683A JP2013071342A JP 2013071342 A JP2013071342 A JP 2013071342A JP 2011212683 A JP2011212683 A JP 2011212683A JP 2011212683 A JP2011212683 A JP 2011212683A JP 2013071342 A JP2013071342 A JP 2013071342A
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Abstract
Description
本発明は、自動車内装用部品や住宅等建築物の内装部材に使用される射出成形品において表面に絵付けされている成形品に関する。特には、絵付け方法が化粧シートを射出と同時に表面に貼りつけるインサート成形によるもので、その表面シートとなるインサート用化粧シートに関するものである。 The present invention relates to a molded product that is painted on the surface of an injection molded product that is used for automobile interior parts and interior members of buildings such as houses. In particular, the painting method is by insert molding in which a decorative sheet is attached to the surface at the same time as injection, and the present invention relates to a decorative sheet for inserts that becomes the surface sheet.
ポリエチレンフィルム原反の化粧シートにポリエチレン樹脂を射出成形したり、ポリプロピレンフィルム原反の化粧シートにポリプロピレン樹脂を射出成形したりする場合、射出樹脂が溶融射出される際の樹脂熱で原反を一部溶融させることで同素材であるために溶融一体化して密着力を確保することが可能であった。しかし、ポリエチレンフィルム原反の化粧シートとポリプロピレン樹脂との射出成形では、異素材であることから溶融一体化することはない。強度や耐熱性から成形品の樹脂をポリプロピレンにしなければならない場合には、ポリエチレン原反の化粧シートは使用できないといった問題があった。 When polyethylene resin is injection-molded on a polyethylene film original decorative sheet or polypropylene resin is injection-molded on a polypropylene film original decorative sheet, the original heat is unified by the resin heat when the injection resin is melt-injected. Since the same material was obtained by melting part, it was possible to fuse and integrate to ensure adhesion. However, in the injection molding of the decorative sheet of polyethylene film and the polypropylene resin, it is not melted and integrated because it is a different material. When the resin of the molded product must be made of polypropylene due to strength and heat resistance, there is a problem that a decorative sheet made of polyethylene raw material cannot be used.
本発明は前記問題点を解決するためになされたものであり、その課題とするところはポリプロピレン樹脂の射出成形品の表面に一体化して設ける化粧シートとしてポリエチレン原反を用いても密着性が維持できるポリプロピレン系樹脂射出成形品用インサート化粧シートを提供することにある。 The present invention has been made to solve the above-mentioned problems, and the problem is that adhesion is maintained even when a polyethylene raw fabric is used as a decorative sheet provided integrally on the surface of an injection molded product of polypropylene resin. An object of the present invention is to provide an insert decorative sheet for a polypropylene resin injection molded product.
本発明は前記問題点を解決したものであり、すなわちその請求項１の発明は、ポリプロピレン系樹脂射出成形品の表面に一体化して設けるポリプロピレン系樹脂射出成形品用インサート化粧シートにおいて、前記化粧シートの原反をポリエチレンフィルムとし、その裏面に少なくとも無水マレイン酸グラフト化ポリプロピレン樹脂層を設けたことを特徴とする、ポリプロピレン系樹脂射出成形品用インサート化粧シートである。 The present invention solves the above-mentioned problems. That is, the invention of claim 1 is an insert decorative sheet for a polypropylene resin injection-molded article that is provided integrally on the surface of a polypropylene resin injection-molded article, and the decorative sheet This is an insert decorative sheet for polypropylene resin injection-molded articles, characterized in that the original film is a polyethylene film and at least a maleic anhydride-grafted polypropylene resin layer is provided on the back surface thereof.
またその請求項２の発明は、前記ポリエチレンフィルムと無水マレイン酸グラフト化ポリプロピレン樹脂層との間に熱硬化性ポリウレタン樹脂層を設けたことを特徴とする請求項１記載のポリプロピレン系樹脂射出成形品用インサート化粧シートである。 The invention according to claim 2 is characterized in that a thermosetting polyurethane resin layer is provided between the polyethylene film and the maleic anhydride grafted polypropylene resin layer. Insert decorative sheet.
本願発明はその請求項１記載の発明により、ポリエチレンフィルムの原反の裏面の最外側に少なくとも無水マレイン酸グラフト化ポリプロピレン樹脂層を設けたことにより、射出樹脂であるポリプロピレン樹脂との密着を向上させ、ポリエチレンフィルム原反のインサートシートで絵付けしたポリプロピレン射出成形品を得ることが可能となった。 According to the invention of claim 1, the present invention improves adhesion to the polypropylene resin as an injection resin by providing at least a maleic anhydride-grafted polypropylene resin layer on the outermost side of the back surface of the polyethylene film. It became possible to obtain a polypropylene injection-molded article painted with an insert sheet of a polyethylene film raw fabric.
また、請求項２記載の発明により、ポリエチレンフィルムの原反と無水マレイン酸グラフト化ポリプロピレン樹脂層と間に熱硬化性ポリウレタン樹脂層を設けたことにより、ポリエチレンフィルムと無水マレイン酸グラフト化ポリプロピレン樹脂層との密着も向上し、更に密着の良好なポリエチレンフィルム原反のインサートシートで絵付けしたポリプロピレン射出成形品を得ることが可能となった。 According to a second aspect of the present invention, a polyethylene film and a maleic anhydride grafted polypropylene resin layer are provided by providing a thermosetting polyurethane resin layer between the polyethylene film raw material and the maleic anhydride grafted polypropylene resin layer. It was possible to obtain a polypropylene injection-molded product painted with an insert sheet of a polyethylene film original fabric having better adhesion.
以下に本発明のポリプロピレン系樹脂射出成形品用インサート化粧シートについて図面に基づき詳細に説明する。図１に本発明のポリプロピレン系樹脂射出成形品用インサート化粧シートの一実施例の断面の構造を示す。ポリエチレンフィルム１１を原反とした化粧シート１は、原反の表面側に印刷インキによる印刷などによって絵柄模様層１２、透明樹脂などからなる表面保護層１３などが設けられてなる。必要であれば透明または半透明の樹脂層（図示せず）を適宜中間に設けても良い。前記ポリエチレンフィルム１１の裏面側がポリプロピレン系樹脂射出成形品側となるが、その裏面側に適宜設ける熱硬化性ポリウレタン樹脂層２と無水マレイン酸グラフト化ポリプロピレン樹脂層３を設けてなる。 Hereinafter, the insert decorative sheet for polypropylene resin injection-molded articles of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of an embodiment of an insert decorative sheet for polypropylene resin injection molded articles of the present invention. The decorative sheet 1 using the polyethylene film 11 as a raw fabric is provided with a pattern layer 12 and a surface protective layer 13 made of a transparent resin or the like on the surface side of the raw fabric by printing with printing ink. If necessary, a transparent or translucent resin layer (not shown) may be appropriately provided in the middle. The back side of the polyethylene film 11 is the polypropylene resin injection-molded product side, and a thermosetting polyurethane resin layer 2 and a maleic anhydride grafted polypropylene resin layer 3 are provided as appropriate on the back side.
本発明における原反となるポリエチレンフィルム１１としては、絵柄模様層１２を積層することを考えるとコロナ放電処理等濡れ性を向上させる処理を事前に施したものが望ましい。層厚は５０〜１００μｍが好適である。 The polyethylene film 11 serving as a raw fabric in the present invention is preferably subjected to a treatment for improving the wettability such as a corona discharge treatment in consideration of the lamination of the pattern layer 12. The layer thickness is preferably 50 to 100 μm.
適宜設ける熱硬化性ポリウレタン樹脂層２としては、前記ポリエチレンフィルム１１と後述の無水マレイン酸グラフト化ポリプロピレン層３の双方に密着が良好なものであれば特に限定するものではないが、後に無水マレイン酸グラフト化ポリプロピレン樹脂層を均一に設けるために表面が平滑であることが好ましい。また、層厚は１〜１０μｍが好適である。 The thermosetting polyurethane resin layer 2 provided as appropriate is not particularly limited as long as it has good adhesion to both the polyethylene film 11 and the maleic anhydride grafted polypropylene layer 3 described later. In order to uniformly provide the grafted polypropylene resin layer, the surface is preferably smooth. Moreover, 1-10 micrometers is suitable for layer thickness.
本発明における無水マレイン酸グラフト化ポリプロピレン層３としては、分散重合され印刷適性のある塗液を用いるのが好ましい。層厚は１〜２０μｍが好適であり、グラビア印刷、シルクスクリーン印刷等、塗液の性状によって適宜選択して行えば良い。表面は、射出成形においてポリプロピレン系樹脂射出成形品となる溶融樹脂側に接するように配されるために表面を均一にして設けるようにする。 As the maleic anhydride grafted polypropylene layer 3 in the present invention, it is preferable to use a coating liquid which is dispersion-polymerized and printable. The layer thickness is preferably 1 to 20 μm, and may be appropriately selected depending on the properties of the coating liquid, such as gravure printing and silk screen printing. Since the surface is arranged so as to be in contact with the molten resin side which becomes a polypropylene resin injection molded product in the injection molding, the surface is made uniform.
原反となるポリエチレンフィルム１１としてリケンテクノス製「ＦＺ」（１２０μｍ）を用い、表裏ともコロナ処理を施した。このポリエチレンフィルム１１の表面に絵柄模様層１２として東洋インキ製造（株）製ウレタンインキ「Ｖ３５１」を用い、木目柄の印刷を施した。同時にこのポリエチレンフィルム１１の裏面に、熱硬化性ポリウレタン樹脂層２として、前記インキと同種のレジンで顔料を添加せずシリカビーズを添加した東洋インキ製造（株）製「Ｖ３２４ＵＲＬＳメジウム」を用い、これを１μｍ塗布厚でグラビア法にて印刷した。
その後、前記絵柄模様層１２の表面側に表面保護層１３として、ＤＩＣグラフィックス（株）製２液硬化型アクリル樹脂「Ｗ４８０」を用い、これをグラビア方式にて１０μｍ塗布厚で塗工した。
最後に、以上のようにして得たシートを枚葉に切り出し、前記熱硬化性ポリウレタン樹脂層２の裏面側に無水マレイン酸グラフト化ポリプロピレン樹脂層３として、日本シーマ（株）製「Ｂ５０２」を用い、シルクスクリーン方式にて３μｍ塗布厚に塗工し、８０℃で１分間乾燥させ、本発明のポリプロピレン系樹脂射出成形品用インサート化粧シートを作成した。
“FZ” (120 μm) manufactured by Riken Technos was used as the polyethylene film 11 as a raw fabric, and both the front and back surfaces were subjected to corona treatment. A wood grain pattern was printed on the surface of the polyethylene film 11 using a urethane ink “V351” manufactured by Toyo Ink Manufacturing Co., Ltd. as a pattern layer 12. At the same time, on the back surface of the polyethylene film 11, as the thermosetting polyurethane resin layer 2, “V324URLS medium” manufactured by Toyo Ink Manufacturing Co., Ltd., in which silica beads are added without adding a pigment with the same kind of resin as that of the ink, Was printed by a gravure method with a coating thickness of 1 μm.
Thereafter, a two-component curable acrylic resin “W480” manufactured by DIC Graphics Co., Ltd. was used as the surface protective layer 13 on the surface side of the pattern pattern layer 12, and this was applied by a gravure method with a coating thickness of 10 μm.
Finally, the sheet obtained as described above is cut into a single sheet, and “B502” manufactured by Nippon Cima Co., Ltd. is used as the maleic anhydride grafted polypropylene resin layer 3 on the back side of the thermosetting polyurethane resin layer 2. The coated decorative sheet for polypropylene resin injection-molded articles of the present invention was prepared by applying a 3 μm coating thickness by a silk screen method and drying at 80 ° C. for 1 minute.
前記熱硬化性ポリウレタン樹脂層２を設けない以外は実施例１と同様にしてポリプロピレン系樹脂射出成形品用インサート化粧シートを作成した。 An insert decorative sheet for polypropylene resin injection-molded articles was prepared in the same manner as in Example 1 except that the thermosetting polyurethane resin layer 2 was not provided.
＜比較例１＞
前記無水マレイン酸グラフト化ポリプロピレン樹脂層３を設けない以外は実施例１と同様にしてポリプロピレン系樹脂射出成形品用インサート化粧シートを作成した。
<Comparative Example 1>
An insert decorative sheet for a polypropylene resin injection molded article was prepared in the same manner as in Example 1 except that the maleic anhydride grafted polypropylene resin layer 3 was not provided.
＜比較例２＞
前記無水マレイン酸グラフト化ポリプロピレン樹脂層３を設けない以外は実施例２と同様にしてポリプロピレン系樹脂射出成形品用インサート化粧シートを作成した。
<Comparative example 2>
An insert decorative sheet for a polypropylene resin injection molded article was prepared in the same manner as in Example 2 except that the maleic anhydride grafted polypropylene resin layer 3 was not provided.
＜射出成形＞
以上のようにして得た実施例１、２、比較例１、２のポリプロピレン系樹脂射出成形品用インサート化粧シートを射出成形型と同形に予備成形し、射出成形金型にセッティングした後、樹脂温度２１０℃で溶融された(株)プライムポリマー製ブロックポリプロピレン樹脂を射出して上記化粧シートと一体化させることにより化粧シート付き射出成形品を作成した。
<Injection molding>
The insert decorative sheets for polypropylene resin injection molded articles of Examples 1 and 2 and Comparative Examples 1 and 2 obtained as described above were preformed in the same shape as the injection mold and set in the injection mold. A block polypropylene resin made of Prime Polymer Co., Ltd. melted at a temperature of 210 ° C. was injected and integrated with the decorative sheet to prepare an injection molded product with a decorative sheet.
＜性能比較＞
ミネベア株式会社製「ＴＣＭ−１０ｋＮＢ型引張圧縮試験機」を用い、２５℃の雰囲気中において引張速度５０ｍｍ／分、射出成形品と化粧シート間の開き角１８０°の条件で引っ張り剥離強度で常態剥離強度を測定した。結果を表１に示す。
<Performance comparison>
Using a TMC-10kNB tensile and compression tester manufactured by Minebea Co., Ltd., normal peeling with a tensile peel strength of 50 mm / min in an atmosphere at 25 ° C. and an opening angle of 180 ° between the injection molded product and the decorative sheet. The strength was measured. The results are shown in Table 1.
本発明のポリプロピレン系樹脂射出成形品用インサート化粧シートは、自動車内装用部品や住宅等建築物の内装部材に使用される射出成形品において表面の絵付けとして利用可能である。 The insert decorative sheet for polypropylene-based resin injection-molded articles of the present invention can be used as a surface painting in injection-molded articles used for automobile interior parts and interior members of buildings such as houses.
１…化粧シート
１１…原反となるポリエチレンフィルム
１２…絵柄模様層
１３…表面保護層
２…熱硬化性ポリウレタン樹脂層
３…無水マレイン酸グラフト化ポリプロピレン樹脂層
DESCRIPTION OF SYMBOLS 1 ... Cosmetic sheet 11 ... Polyethylene film 12 used as a raw fabric ... Picture pattern layer 13 ... Surface protective layer 2 ... Thermosetting polyurethane resin layer 3 ... Maleic anhydride grafted polypropylene resin layer
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011212683A JP5786602B2 (en) | 2011-09-28 | 2011-09-28 | Insert decorative sheet for polypropylene resin injection molded products |
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| JP2011212683A JP5786602B2 (en) | 2011-09-28 | 2011-09-28 | Insert decorative sheet for polypropylene resin injection molded products |
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| JP2013071342A true JP2013071342A (en) | 2013-04-22 |
| JP5786602B2 JP5786602B2 (en) | 2015-09-30 |
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Citations (7)
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|---|---|---|---|---|
| JPH11216819A (en) * | 1998-01-30 | 1999-08-10 | Dainippon Printing Co Ltd | Decorative sheet |
| JPH11240116A (en) * | 1998-02-26 | 1999-09-07 | Dainippon Printing Co Ltd | Decorative sheet |
| JP2000502964A (en) * | 1995-12-21 | 2000-03-14 | ザ・ダウ・ケミカル・カンパニー | Manufacturing method of laminate |
| JP2001225350A (en) * | 2000-02-16 | 2001-08-21 | Dainippon Printing Co Ltd | Injection molding in-mold decorating method |
| JP2007262337A (en) * | 2006-03-29 | 2007-10-11 | Mitsubishi Chemicals Corp | Decorative sheet and laminate using the same |
| JP2009179063A (en) * | 2009-05-18 | 2009-08-13 | Dainippon Printing Co Ltd | Sheet for china-painting simultaneous with injection molding |
| JP2010163576A (en) * | 2009-01-19 | 2010-07-29 | Mitsubishi Rayon Co Ltd | Photocurable resin composition, photocurable sheet, photocurable decorative sheet, photocurable sheet for molding, laminate-molded article, and method for producing laminate-molded article |
-
2011
- 2011-09-28 JP JP2011212683A patent/JP5786602B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000502964A (en) * | 1995-12-21 | 2000-03-14 | ザ・ダウ・ケミカル・カンパニー | Manufacturing method of laminate |
| JPH11216819A (en) * | 1998-01-30 | 1999-08-10 | Dainippon Printing Co Ltd | Decorative sheet |
| JPH11240116A (en) * | 1998-02-26 | 1999-09-07 | Dainippon Printing Co Ltd | Decorative sheet |
| JP2001225350A (en) * | 2000-02-16 | 2001-08-21 | Dainippon Printing Co Ltd | Injection molding in-mold decorating method |
| JP2007262337A (en) * | 2006-03-29 | 2007-10-11 | Mitsubishi Chemicals Corp | Decorative sheet and laminate using the same |
| JP2010163576A (en) * | 2009-01-19 | 2010-07-29 | Mitsubishi Rayon Co Ltd | Photocurable resin composition, photocurable sheet, photocurable decorative sheet, photocurable sheet for molding, laminate-molded article, and method for producing laminate-molded article |
| JP2009179063A (en) * | 2009-05-18 | 2009-08-13 | Dainippon Printing Co Ltd | Sheet for china-painting simultaneous with injection molding |
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