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JP4582292B2 - Cosmetic sheet for injection molding base material - Google Patents
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JP4582292B2 - Cosmetic sheet for injection molding base material - Google Patents

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JP4582292B2
JP4582292B2 JP2004061785A JP2004061785A JP4582292B2 JP 4582292 B2 JP4582292 B2 JP 4582292B2 JP 2004061785 A JP2004061785 A JP 2004061785A JP 2004061785 A JP2004061785 A JP 2004061785A JP 4582292 B2 JP4582292 B2 JP 4582292B2
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resin
layer
decorative sheet
base material
injection molding
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JP2005246824A (en
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幸雄 鈴木
一照 加藤
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Toppan Inc
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Description

本発明は、自動車、自動車用インスツルメントパネル、家電製品、建築内外装材等に使われる射出成形基材用化粧シートに関し、特には燃やしてもダイオキシンの発生がないオレフィン系樹脂を使用した射出成形基材用化粧シートに関する。   The present invention relates to a decorative sheet for an injection-molded base material used for automobiles, instrument panels for automobiles, household appliances, interior / exterior materials for buildings, and the like, and in particular, injection using an olefin resin that does not generate dioxin even when burned. The present invention relates to a decorative sheet for a molded substrate.

従来、自動車、家電製品、建築内外装材等に使われる部材、特に自動車のインスツルメントパネルに化粧する場合は、水圧転写法、オーバーレイ転写(真空圧空転写)法、真空圧空ラミネート法、突板を真空プレスラミネートする方法が知られていた。   Conventionally, when applying to parts used for automobiles, home appliances, interior / exterior materials, especially instrument panels of automobiles, water pressure transfer method, overlay transfer (vacuum pressure air transfer) method, vacuum pressure air laminating method, bumper A method of vacuum press lamination was known.

ところが、表面の平滑性と装飾性に優れたシートに射出成形する方法は知られていたが、ロール状の連続シートとして作れなかった。さらに、透明の熱可塑性樹脂の裏面側に凹凸模様を施した後、マイカ等のパール顔料やアルミ粉等のメタリック顔料をアクリル系やウレタン系のインキや塗料を使う化粧シートは有ったが、凹凸模様を熱プレスにより作製するため、連続ロール状の化粧シートにすることが出来なかった。また化粧シートを予備成形した後、射出成形する方法も知られていたが、高光沢の化粧シートはなかった。
特開平9−226082号公報 特開2000−135756号公報 特表2003−511271号公報
However, although a method of injection molding into a sheet having excellent surface smoothness and decorativeness has been known, it has not been possible to produce a roll-like continuous sheet. In addition, there was a decorative sheet that used acrylic or urethane inks and paints for pearl pigments such as mica and metallic pigments such as aluminum powder after applying a concavo-convex pattern on the back side of a transparent thermoplastic resin. Since the concavo-convex pattern was produced by hot pressing, a continuous roll-shaped decorative sheet could not be obtained. Also, a method of injection molding after preforming a decorative sheet has been known, but there was no high gloss decorative sheet.
Japanese Patent Laid-Open No. 9-226082 JP 2000-135756 A Special table 2003-511271 gazette

本発明はこのような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、ロール状の連続シートとして作製可能であり、かつ高光沢な鏡面状の平滑面を得ることを可能とし、燃焼によるダイオキシン発生等の問題のない射出成形基材用化粧シートを提供することにある。   The present invention has been made to solve such problems, and the problem is to obtain a mirror-like smooth surface that can be produced as a roll-like continuous sheet and has a high gloss. An object of the present invention is to provide a decorative sheet for an injection-molded base material, which is possible and has no problems such as generation of dioxins due to combustion.

本発明は前記課題を解決するためになされたものであり、その請求項1記載の発明は、非結晶性の共重合ポリエステル樹脂からなるバッカー層の上に、ポリオレフィン系樹脂からなる基材層と、表面に鏡面状の平滑面を有する非結晶性の共重合ポリエステル樹脂及び/又は非晶状態の結晶性ポリエステル樹脂からなる表面層とを少なくともこの順に積層してなり、更に前記平滑面上に硬化性樹脂からなる接着層とアクリルウレタン樹脂の側鎖にオルガノポリシロキサンが導入されたシリコーン変成アクリルウレタン樹脂を主成分とする硬化性樹脂からなる保護層とを設け、該保護層面に対して鏡面エンボスロールによる鏡面エンボス加工を施してなり、前記接着層は前記平滑面上に乾燥後の塗布量を10g/m に塗布することにより形成されることを特徴とする射出成形基材用化粧シートである。 The present invention has been made to solve the above problems, and the invention according to claim 1 includes a base material layer made of a polyolefin-based resin on a backer layer made of an amorphous copolyester resin. And a surface layer made of an amorphous copolyester resin having a mirror-like smooth surface and / or a crystalline polyester resin in an amorphous state at least in this order, and further hardened on the smooth surface. A protective layer made of a curable resin mainly composed of a silicone-modified acrylic urethane resin in which organopolysiloxane is introduced into the side chain of the acrylic urethane resin, and a mirror surface with respect to the protective layer surface Mirror surface embossing by embossing roll is performed, and the adhesive layer is formed by applying the coating amount after drying to 10 g / m 2 on the smooth surface. A decorative sheet for an injection-molded substrate.

本発明による射出成形基材用化粧シートは、その層構成から無理なくロール状の連続化粧シートを作ることが出来、金型内にインサートして溶融樹脂を射出成形することによりその熱で化粧シートと射出成形した樹脂とを一体化するものであるが、保護層を設けたまま射出成形することで高光沢な鏡面状の平滑面を保つことが可能となる。また全体としてオレフィン系樹脂からなり、焼却によるダイオキシン発生の問題がないものとなる。   The decorative sheet for an injection-molded base material according to the present invention can reasonably produce a roll-shaped continuous decorative sheet from its layer structure, and is inserted into a mold and injection-molded with a molten resin, and the decorative sheet is heated with the heat. And the injection-molded resin are integrated, but it is possible to maintain a highly glossy mirror-like smooth surface by injection molding with the protective layer provided. Moreover, it consists of an olefin resin as a whole, and there is no problem of dioxin generation by incineration.

図1に、本発明の射出成形基材用化粧シートの断面の構造を示す。   In FIG. 1, the structure of the cross section of the decorative sheet for injection molding base materials of this invention is shown.

裏面側から表面側に向かって、バッカー層1、基材層2、表面層3、接着層4、保護層5の構造を基本とする。   Based on the structure of the backer layer 1, the base material layer 2, the surface layer 3, the adhesive layer 4, and the protective layer 5 from the back side to the front side.

本発明におけるバッカー層1は、化粧シート全体に厚みと強度を持たせるためのものであり、非結晶性の共重合ポリエステル樹脂が最適である。その厚みは150〜300μm程度、より好ましくは200〜250μm程度である。その裏面に射出成形樹脂との易接着層を設けても良い。   The backer layer 1 in the present invention is for giving thickness and strength to the entire decorative sheet, and an amorphous copolyester resin is optimal. The thickness is about 150 to 300 μm, more preferably about 200 to 250 μm. You may provide an easily bonding layer with injection molding resin in the back surface.

基材層2は表面層との接着性とシートとしての加工適性を持たせるためのものであり、焼却によるダイオキシン発生の問題がないものとするためポリオレフィン系樹脂が好ましい。その厚みは50〜150μm、より好ましくは90〜120μm程度である。その表面側に印刷層を設けても良いが、基材層2が透明ならその裏面側に設けて隠蔽層としても良い。印刷法はグラビア印刷法が好適である。   The base material layer 2 is for imparting adhesion to the surface layer and processability as a sheet, and is preferably a polyolefin-based resin in order to eliminate the problem of dioxin generation due to incineration. The thickness is about 50 to 150 μm, more preferably about 90 to 120 μm. A printed layer may be provided on the front side, but if the base material layer 2 is transparent, it may be provided on the back side to serve as a concealing layer. The gravure printing method is suitable for the printing method.

表面層3は表面を鏡面状の平滑面に加工する適性をもたせるためのもので、最終的には表面硬度や溶剤性や耐傷性が求められるものであり、非結晶性の共重合ポリエステル樹脂及び/又は非晶状態の結晶性ポリエステル樹脂が最適である。これにより高温のシボ戻りが防止できるものとなり、かつ耐溶剤性、耐傷付き性が向上する。その厚みは50〜250μm程度、より好ましくは100〜200μm程度である。
Surface layer 3 is for to have suitability for processing the surface into a mirror-like smooth surface, ultimately it is those surface hardness and solvent resistance and scratch resistance is required, the non-crystalline copolymerized polyester And / or an amorphous crystalline polyester resin is optimal. As a result, high-temperature embossing can be prevented, and solvent resistance and scratch resistance are improved. The thickness is about 50 to 250 μm, more preferably about 100 to 200 μm.

接着層4はそのまま射出成形する際に鏡面状の平滑面と保護層を接着するもので、硬化性樹脂が用いられて、イソシアネート硬化型のアクリルウレタン系樹脂や(メタ)アクリレート系電離放射線硬化型樹脂等の硬化性物質が用いられる。 The adhesive layer 4 adheres the mirror-like smooth surface and the protective layer when injection molding is performed as it is, and is made of an curable resin, such as an isocyanate curable acrylurethane resin or a (meth) acrylate ionizing radiation curable type. curable material such as a resin is Ru is used.

保護層5はアクリルウレタン樹脂の側鎖にオルガノポリシロキサンが導入されたシリコーン変成アクリルウレタン樹脂を主成分とする硬化性樹脂からなる。
The protective layer 5 is made of a curable resin mainly composed of a silicone-modified acrylic urethane resin in which organopolysiloxane is introduced into the side chain of the acrylic urethane resin.

本発明の射出成形基材用化粧シートを用いて射出成形する熱可塑性樹脂としては、ポリプロピレン樹脂、ポリエチレン樹脂、ポリスチレン樹脂、アクリルニトリル−ブタジエン−スチレン共重合樹脂等に着色顔料、熱安定剤、酸化防止剤、光安定剤等を添加したものが適用可能である。   The thermoplastic resin to be injection-molded using the decorative sheet for an injection-molded substrate of the present invention includes polypropylene resin, polyethylene resin, polystyrene resin, acrylonitrile-butadiene-styrene copolymer resin, etc., color pigment, heat stabilizer, oxidation What added an inhibitor, a light stabilizer, etc. is applicable.

厚み90μmの着色ホモポリプロピレン樹脂フィルムからなる基材層の表面に、2液硬化型ウレタン樹脂系インキを使用してグラビア印刷法にて抽象柄の絵柄を印刷した。一方、厚み170μmの非結晶性1,4−シクロヘキサンジメタノール共重合ポリエチレンテレフタレート(PET−G)樹脂層と、厚み30μmの非晶状態のポリエチレンテレフタレート(A−PET)樹脂層との共押出フィルムからなる表面層のA−PET樹脂層面に、アクリルポリオール化合物100重量部、ポリジメチルシロキサンプロピロール化合物10重量部、ヘキサメチレンジイソシアネート系硬化剤10重量部からなる塗料を乾燥後の塗布量12g/mに塗工して保護層を形成した。 An abstract pattern was printed on the surface of a base layer made of a colored homopolypropylene resin film having a thickness of 90 μm by a gravure printing method using a two-component curable urethane resin ink. On the other hand, from a coextruded film of an amorphous 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate (PET-G) resin layer having a thickness of 170 μm and an amorphous polyethylene terephthalate (A-PET) resin layer having a thickness of 30 μm. A coating amount of 12 g / m 2 after drying a paint comprising 100 parts by weight of an acrylic polyol compound, 10 parts by weight of a polydimethylsiloxane propirole compound, and 10 parts by weight of a hexamethylene diisocyanate curing agent on the surface of the A-PET resin layer of the surface layer. To form a protective layer.

次いで、前記熱可塑性樹脂基材層の印刷面に、2液硬化型ウレタン樹脂系接着剤を乾燥後の塗布量10g/mに塗布し、該塗布面に前記表面層のPET−G樹脂層面を向けて重ね合わせ、ドライラミネート法により積層すると同時に前記保護層面に対して鏡面エンボスロールによる鏡面エンボス加工をシート温度143℃以上、鏡面エンボスロールの表面温度65℃の条件で行った。
Next, a two-component curable urethane resin adhesive is applied to the printed surface of the thermoplastic resin substrate layer at a coating amount of 10 g / m 2 after drying, and the PET-G resin layer surface of the surface layer is applied to the coated surface. And at the same time , the surface of the protective layer was subjected to mirror embossing with a mirror embossing roll at a sheet temperature of 143 ° C. or higher and a surface temperature of the mirror embossing roll of 65 ° C.

次に、前記熱可塑性樹脂基材層の裏面に、厚み200μmの非結晶性1,4−シクロヘキサンジメタノール共重合ポリエチレンテレフタレート(PET−G)樹脂シートからなる熱可塑性樹脂バッカー層を、2液硬化型ウレタン樹脂系接着剤を乾燥後の塗布量10g/mに塗布しドライラミネートしながら、保護フィルムとして厚み60μmのポリエチレン樹脂製E−212(スミロン株式会社製)を前記保護層面に貼り合わせて射出成形基材用化粧シートを得た。 Next, a thermoplastic resin backer layer made of an amorphous 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate (PET-G) resin sheet having a thickness of 200 μm is cured on the back surface of the thermoplastic resin base material layer by two-component curing. While applying a dry urethane resin adhesive to a coating amount of 10 g / m 2 after dry drying, a polyethylene resin E-212 (manufactured by Sumilon Co., Ltd.) having a thickness of 60 μm is bonded to the protective layer surface as a protective film. A decorative sheet for an injection-molded substrate was obtained.

前記熱可塑性樹脂バッカー層の裏面に、ポリオレフィン樹脂系接着剤を乾燥後の塗布量5g/m塗布して射出成形基材用化粧シートを得た。
(性能評価1)真空成形
上記の射出成形基材用化粧シートをウレタン変性ビニル樹脂水性接着剤CVC555:架橋剤V=100:5(コニシ株式会社製)を60g/m(WET)スプレー塗装して四方が曲率半径5R厚み25mmの中密度繊維板にシート温度120℃で真空成形した化粧板を外観性能評価した結果良好であった。
(性能評価2)射出成形
射出成形用金型の雌型21と雄型22の間に射出成形基材用化粧シートを熱可塑性樹脂バッカー層7を雄型21の方に向け挿入し、必要に応じて真空成形等により雌型22に沿って密着させた後、雄型21よりマレイン酸変性し(熱可塑性樹脂23)、着色剤を添加したポリプロピレン樹脂系相溶化剤を5部添加したポリプロピレン樹脂を、配線保持する1次成形体になるように1次金型にて射出成形してなる基材にコロナ処理や低温プラズマ処理を施して38mN/mに処理した後、同種のマレイン酸変性したポリプロピレン樹脂系相溶化剤を5部添加したポリプロピレン樹脂(熱可塑性樹脂23)を250℃で射出成形して一体化して射出成形基材40を得た。溶融樹脂を射出することにより、射出成形基材40を作製した。
On the back surface of the thermoplastic resin backer layer, a polyolefin resin adhesive was applied at a coating amount of 5 g / m 2 after drying to obtain a decorative sheet for an injection-molded substrate.
(Performance Evaluation 1) Vacuum Forming The decorative sheet for injection-molded base material is spray-coated with urethane-modified vinyl resin aqueous adhesive CVC555: cross-linking agent V = 100: 5 (manufactured by Konishi Co., Ltd.) at 60 g / m 2 (WET). As a result of evaluating the appearance performance of a decorative board vacuum-formed on a medium density fiber board with a radius of curvature of 5R and a thickness of 25 mm at a sheet temperature of 120 ° C., the results were good.
(Performance Evaluation 2) Injection Molding Inserting a decorative sheet for injection molding base material between the female mold 21 and the male mold 22 of the injection molding mold with the thermoplastic resin backer layer 7 facing the male mold 21 is necessary. Accordingly, after being closely adhered along the female mold 22 by vacuum forming or the like, maleic acid modification from the male mold 21 (thermoplastic resin 23), and a polypropylene resin containing 5 parts of a polypropylene resin-based compatibilizing agent to which a coloring agent is added. Was subjected to corona treatment or low-temperature plasma treatment on a substrate formed by injection molding in a primary mold so as to be a primary molded body for holding wiring, and then treated to 38 mN / m, and then the same kind of maleic acid was modified. A polypropylene resin (thermoplastic resin 23) added with 5 parts of a polypropylene resin-based compatibilizer was injection molded at 250 ° C. and integrated to obtain an injection-molded substrate 40. An injection-molded substrate 40 was produced by injecting molten resin.

本発明は、自動車、自動車用インスツルメントパネル、家電製品、建築内外装材等に使われる射出成形基材用化粧シートに関し、特には燃やしてもダイオキシンの発生がないオレフィン系樹脂を使用した射出成形基材用化粧シートに適用可能である。   The present invention relates to a decorative sheet for an injection-molded base material used for automobiles, instrument panels for automobiles, household appliances, interior / exterior materials for buildings, and the like, and in particular, injection using an olefin resin that does not generate dioxin even when burned. It can be applied to a decorative sheet for a molded substrate.

本発明における射出成形基材用化粧シートの断面の構造を示す説明図である。It is explanatory drawing which shows the structure of the cross section of the decorative sheet for injection molding base materials in this invention. 本発明の射出成形基材用化粧シートを用いた射出成形の説明図である。It is explanatory drawing of injection molding using the decorative sheet for injection molding base materials of this invention.

符号の説明Explanation of symbols

1…バッカー層
2…基材層
3…表面層
4…接着層
5…保護層
20…射出成形基材用化粧シート
21…雌型
22…雄型
23…熱可塑性樹脂
40…射出成形基材
DESCRIPTION OF SYMBOLS 1 ... Backer layer 2 ... Base material layer 3 ... Surface layer 4 ... Adhesive layer 5 ... Protective layer 20 ... Cosmetic sheet for injection molding base materials 21 ... Female mold 22 ... Male mold 23 ... Thermoplastic resin 40 ... Injection molding base material

Claims (1)

非結晶性の共重合ポリエステル樹脂からなるバッカー層の上に、ポリオレフィン系樹脂からなる基材層と、表面に鏡面状の平滑面を有する非結晶性の共重合ポリエステル樹脂及び/又は非晶状態の結晶性ポリエステル樹脂からなる表面層とを少なくともこの順に積層してなり、更に前記平滑面上に硬化性樹脂からなる接着層とアクリルウレタン樹脂の側鎖にオルガノポリシロキサンが導入されたシリコーン変成アクリルウレタン樹脂を主成分とする硬化性樹脂からなる保護層とを設け、該保護層面に対して鏡面エンボスロールによる鏡面エンボス加工を施してなり、前記接着層は前記平滑面上に乾燥後の塗布量を10g/m に塗布することにより形成されることを特徴とする射出成形基材用化粧シート。 On a backer layer made of an amorphous copolyester resin, a base material layer made of a polyolefin-based resin, an amorphous copolyester resin having a mirror-like smooth surface and / or an amorphous state formed by laminating a surface layer made of crystalline polyester resin at least in this order, further wherein consists hardening resin on a smooth surface adhesive layer and the silicone-modified acrylic organopolysiloxane was introduced into a side chain of an acrylic urethane resin And a protective layer made of a curable resin mainly composed of a urethane resin. The protective layer surface is subjected to mirror surface embossing with a mirror surface embossing roll, and the adhesive layer is coated on the smooth surface after drying. A decorative sheet for an injection-molded substrate, wherein the decorative sheet is formed by applying 10 g / m 2 .
JP2004061785A 2004-03-05 2004-03-05 Cosmetic sheet for injection molding base material Expired - Fee Related JP4582292B2 (en)

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