JP4357631B2 - Decorative molded products - Google Patents
Decorative molded products Download PDFInfo
- Publication number
- JP4357631B2 JP4357631B2 JP10528199A JP10528199A JP4357631B2 JP 4357631 B2 JP4357631 B2 JP 4357631B2 JP 10528199 A JP10528199 A JP 10528199A JP 10528199 A JP10528199 A JP 10528199A JP 4357631 B2 JP4357631 B2 JP 4357631B2
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- Prior art keywords
- molded product
- resin
- colored
- ink layer
- decorative
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14811—Multilayered articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14688—Coating articles provided with a decoration
- B29C2045/14704—Coating articles provided with a decoration ink decorations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
- B29K2715/006—Glues or adhesives, e.g. hot melts or thermofusible adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/002—Coloured
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0026—Transparent
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、加飾シートが樹脂成形物表面に積層一体化した加飾成形品に関する。特に、射出成形同時加飾方法等で加飾シートを伸ばして成形して樹脂成形物に積層一体化した加飾成形品にて、伸ばされた部分の加飾シートの色の変化が目立ちにくい加飾成形品に関する。
【0002】
【従来の技術】
従来から、樹脂成形物の表面を加飾した加飾成形品が各種用途で使用されている。例えば、特公昭50−19132号公報等に開示の射出成形同時加飾方法では、樹脂成形物の成形と同時にその表面に加飾シートを積層一体化する事で、表面が加飾された加飾成形品が得られる。なお、これは、射出成形同時加飾方法のうちの射出成形同時ラミネ−ト法による方法である。
【0003】
【発明が解決しようとする課題】
ところで、樹脂成形物表面に積層する加飾シートによって表現する絵柄は、通常は、全面にわたって形成する着色インキ層等による下地色の手前側(見る方の側)に、柄パターンを有する絵柄インキ層を設けた構成として、所望の色の絵柄を表現する事が多い。そして、加飾成形品では、樹脂成形物の表面に加飾シートが積層一体化される時に、加飾シートは通常、伸ばされ成形されて積層一体化される。この為に、伸ばされた部分の加飾シートは厚さが薄くなる為に柄の色が変化し、その変化が大きいと製品として成り立たなくなってしまう事がある。この為、従来の加飾成形品に於いては、加飾シートが伸ばされた部分の色変化がなるべく起きずに、また起きても目立たない様に、例えば次の様な工夫がなされて来た。
【0004】
▲1▼例えば、射出成形で得られる樹脂成形物に於いて、これを着色して着色樹脂成形物として、その着色樹脂成形物の色を下地色として利用する。加飾成形品は、この着色樹脂成形物に、透明樹脂シートに絵柄インキ層を形成した加飾シートを、積層一体化させた構成とする。この為、成形樹脂中には顔料等の着色剤を添加して、樹脂成形物を着色した。
【0005】
▲2▼或いは、下地色の色も加飾シート側で表現する。この為、加飾シートの基材シートとして着色樹脂シートを用いる。そして、この着色樹脂シートの表側に絵柄インキ層を印刷形成してパターン柄を表現する。なお、通常は更に、着色インキ層の上に保護層として透明樹脂シートを積層した構成の加飾シートを使用する事が多い(特公昭61−17255号公報等参照)。
【0006】
しかしながら、上記▲1▼の構成の加飾成形品では、もしも、ロット毎(或いは同一ロット内でも成形ショット毎に)着色樹脂成形物に添加されている着色剤の色、添加量(或いは配合比)、分散状態等の変化、バラツキによって、着色樹脂成形物の色が少し変化すると、製品(加飾成形品)の柄の色にそのまま影響が及ぼされ、その度合いによっては製品として成り立たなくなる事があった。
【0007】
また、上記▲2▼の構成の加飾成形品では、基材シート(通常は厚さ0.1〜0.5mm)が着色されているので、樹脂成形物の色(この場合の色は、製品の柄の下地色として利用する事は必ずしも必要では無く、裏側からの光の影響を無くしたり、その他の目的の為に、例えば黒色等の色でも良い)が変化しても、製品の柄の色には影響し無い。しかし、上記の如く、通常は樹脂シートが着色した基材シートと透明樹脂シートとの2層となる為に、コストアップとなってしまう。また、その分、加飾シートの総厚が厚くなり切断しにくくなるので、樹脂成形物に積層一体化後の不要部分(例えば周囲や内部窓部等)のトリミングや、取り扱いが難しくなった。
【0008】
そこで、本発明の課題は、射出成形同時加飾方法等によって加飾シートを伸ばして成形して樹脂成形物の表面に積層一体化した加飾成形品に於いて、伸ばされた部分の絵柄の色の変化を目立ち難くする事である。
【0009】
【課題を解決するための手段】
そこで、上記課題を解決すべく、透明熱可塑性樹脂シートと、該透明熱可塑性樹脂シートの裏面に全面にわたって形成された着色インキ層とからなる加飾シートが、着色樹脂成形物の表面に、前記着色インキ層側が該着色樹脂成形物側を向く様にして積層一体化されてなり、前記着色インキ層と該着色樹脂成形物との色差が国際照明委員会のL* a* b* 表色系による色差式で30以下である構成とした。
この様な構成とすれば、着色インキ層と、着色樹脂成形物との色がほぼ同じなので、加飾シートを着色樹脂成形物の表面形状に追従して積層一体化させる過程で、加飾シートが伸びた部分、すなわち、隠蔽性が低下する部分では、加飾シートを透過して着色樹脂成形物の色が加飾シートの色に混色されるが、混色される色同士は概ね同色の為、加飾成形品が表現する色の変化を少なくする事ができる。また、着色樹脂成形物の色が、ロット間、或いはロット内でバラツいて多少違っても、着色インキ層がカバーし影響を少なくする事ができる。
【0010】
また、本発明の加飾成形品は、上記加飾成形品に於いて、更に透明熱可塑性樹脂シートと着色インキ層との間に絵柄インキ層を有する構成とした。
この様な構成とする事で、絵柄インキ層によってパターン柄が表現され、より高意匠の加飾成形品にできる。
【0011】
また、本発明の加飾成形品は、上記いずれかの加飾成形品に於いて、更に着色インキ層と着色樹脂成形物との間に透明接着剤層を有する構成とした。
この様な構成とすれば、接着剤層は透明であるので、接着剤層によって加飾成形品が表現する色に影響を及ぼす事無く、加飾シートと着色樹脂成形物との密着性を向上できる。
【0012】
【発明の実施の形態】
以下、図面を参照しながら本発明の実施の形態を説明する。なお、図1は、本発明の加飾成形品を或る一形態を例示する断面図である。
【0013】
〔層構成〕
本発明の加飾成形品に使用される加飾シートSの層構成は、最低限、透明熱可塑性樹脂シート1と、該透明熱可塑性樹脂シートの裏面に全面にわたって形成された着色インキ層2とから構成される。そして、図1に例示の加飾成形品Dの如く、更に、加飾シートSの積層一体化による部分の層構成では、透明熱可塑性樹脂シート1と着色インキ層2との間の絵柄インキ層3、着色インキ層2と着色樹脂成形物Mとの間の透明接着剤層4を有する層構成もある。なお、透明接着剤層4は、同図では、加飾シートSに属する層として図示してあるが、加飾成形品Dとしては、加飾シートSに属さない層の場合もある。それは、加飾成形品Dを、射出成形同時加飾方法で得る場合には、必然的に透明接着剤層4は加飾シートSの構成要素となるが、真空成形積層法〔特公昭56−45768号公報(オーバーレイ法)、特公昭60−58014号公報(真空プレス法)等参照〕では、透明接着剤層4は、予め着色樹脂成形物側に施しておく事もあるからである。
【0014】
〔色差〕
そして、本発明の加飾成形品では、以上の層構成に於いて、着色インキ層2と着色樹脂成形物Mとの色の差が、国際照明委員会(CIE)のL* a* b* 表色系を用いた色差式にて30以下である様にした。色差式の値が30以下となる色の差に抑えることで、たとえ加飾シートが伸ばされて薄くなって、着色樹脂成形物の色がある程度透視できる様になっても、その部分の色の変化が目立ち難くなるのである。
なお、加飾成形品が表す色とは、当然であるが、着色インキ層、着色樹脂成形物、着色樹脂成形物、或いは透明熱可塑性樹脂シートが着色されている場合は該樹脂シートの色等が総合された色である。
【0015】
上記色差式としては、CIE(国際照明委員会)のL* a* b* 表色系を用いた色差式以外にも、CIEのL* u* v* 表色系を用いた色差式、HunterのLab表色系を用いた色差式、或いは、FMC(Friele,MacAdam,Chickering)−IIの色差式等でも良い。なお、CIEは表色系及び色差式両方を規定している。また、上記L* a* b* 表色系やL* u* v* 表色系を用いた色差式は、JIS Z 8730でも色差として採用されている。
【0016】
但し、その場合、採用する色差式によって、本発明に於ける許容できる色差の上限値は異なる。しかし、いずれの場合であっても、国際照明委員会(CIE)のL* a* b* 表色系の色差式で色差を30以下に相当する値になるようにすれば、本発明の効果は得られる。
【0017】
〔透明熱可塑性樹脂シート〕
透明熱可塑性樹脂シート1としては、凹凸面に加飾シートを追従させて成形できる様な成形性を持たせる為に、熱可塑性樹脂のシートとし、また、下の着色インキ層の色が見える様に透明とする。なお、透明とは半透明も含む。また、後述着色インキ層で述べる着色剤添加等によって着色透明としても良い。そして、透明熱可塑性樹脂シートは、下側の着色インキ層や絵柄インキ層等に対する支持体シートとなり、また、これらの保護層ともなる。
透明熱可塑性樹脂シートとしては、上記特性を備えればその材料に特に制限は無い。例えば、一般的には、ポリ(メタ)アクリル酸メチル、ポリ(メタ)アクリル酸エチル、ポリ(メタ)アクリル酸ブチル、(メタ)アクリル酸メチル−(メタ)アクリル酸ブチル共重合体、ポリアクリロニトリル等のアクリル樹脂〔(メタ)アクリルとは、アクリル又はメタクリルの意味〕、ポリエチレン、ポリプロピレン、ポリメチルペンテン、エチレン−プロピレン共重合体、エチレン−プロピレン−ブテン共重合体、オレフィン系熱可塑性エラストマー等のポリオレフィン系樹脂、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、エチレン−イソフタレート−テレフタレート共重合体等の熱可塑性ポリエステル樹脂、ポリフッ化ビニル、ポリフッ化ビニリデン、エチレン−4フッ化エチレン共重合体等のフッ素樹脂、ポリカーボネート、塩化ビニル樹脂、AS(アクリロニトリル−スチレン共重合体)樹脂、ABS(アクリロニトリル−ブタジエン−スチレン共重合体)樹脂等からなる樹脂シートが使用できる。透明熱可塑性樹脂シートの厚みは特に限定されないが、一般的には30〜200μm程度である。
【0018】
なお、透明熱可塑性樹脂シート中には、必要に応じて、適宜、ワックス等の滑剤、シリカ、球状α−アルミナ等の粒子からなる減磨剤、ベンゾトリアゾール系、ベンゾフェノン系、微粒子酸化セリウム系等の紫外線吸収剤、ヒンダードアミン系ラジカル捕捉剤等の光安定剤、可塑剤、安定剤、等の各種添加剤を、物性調整の為に添加しても良い。
【0019】
〔着色インキ層〕
着色インキ層2は、透明熱可塑性樹脂シートの裏側の面に全面にわたって形成された透明性、又は好ましくは隠蔽性で、且つ成形性を備えた着色層である。従って、着色インキ層は全ベタ層である。なお、着色インキ層2は、パターン状にでは無く全面形成である為に、グラビア印刷等の公知の印刷法以外に、塗液を用いたロールコート等の公知の塗工法で形成する事もできる。本発明では後者の場合も含めて着色インキ層と言う。通常は、この着色インキ層は、柄パターンを有する絵柄インキ層と共に使用する事が多い。しかし、この着色インキ層のみによる全面ベタ柄を加飾成形品の柄とする事もある。
なお、着色インキ層は、通常、塗布量で3〜5g/m2 程度とするが、これに限定されるものでは無い。塗布量が少なすぎると隠蔽性が十分に得られず、また逆に多すぎでもコスト高となるだけである。
【0020】
着色インキ層2は、一般的なインキ層同様に、バインダー等からなるビヒクルに、顔料や染料等の着色剤、これに適宜加える各種添加剤等から構成されるインキ(塗液も含む)で形成する。バインダーに用いる樹脂としては、成形性を着色インキ層に付与できれば、特に制限は無く、密着性の他、例えば耐候性等のその他要求物性を考慮して公知の樹脂の中から適宜選択使用すれば良い。
【0021】
例えば、バインダーの樹脂としては、アクリル樹脂、塩素化ポリプロピレン、塩化ビニル−酢酸ビニル共重合体、ウレタン樹脂、ポリエステル樹脂、ポリアミド樹脂等の通常は熱可塑性樹脂の樹脂を1種、又は2種以上の混合物を用いる。また、完全硬化前に加飾シートを積層一体化する等して成形性を満足すれば、2液硬化型ウレタン樹脂等の熱硬化性樹脂も使用できる。
【0022】
また、着色剤は、着色樹脂成形物との色差をCIEのL* a* b* 表色系を用いた色差式で30以下と出来る様な着色剤とする他は、特に制限は無く表現する色に応じて公知の着色剤を使用すれば良い。例えば、着色剤としては、カーボンブラック、チタン白(アナターゼ型、ルチル型)、弁柄、カドミウムレッド、黄鉛、コバルトブルー等の無機顔料、キナクリドン、イソインドリノン、フタロシアニンブルー等の有機顔料(又は染料)、アルミニウム、真鍮等の箔粉からなる金属顔料、二酸化チタン被覆雲母の箔粉等からなる真珠光沢(パール)顔料等の1種、又は2種以上を混合して用いる。
また、着色剤としては、例えば、リソールマルーントーナー、アリザリンレーキB、カドミウムマルーン、B.O.N.レッドトーナー(5B)、カルシウムリソールトーナー、バリウムリソールトーナー、ピグメントスカーレット、B.O.N.レッドトーナー(Y)、リソールルビン、ブリリアントレッドレーキR、レーキレッドCバリウムトーナー、鉛丹、ナトリウムリソールトーナー、トルイジントーナーライト、カドミウムレッドライト、ローダミントーナーB、ローダミントーナーY、パラレッドトーナーライト、塩素化パラレッドトーナー、クロムバーミリオン、ブロンズオレンジ、ジニトロアニリンオレンジ、ベンジジンオレンジ、赤口黄鉛、カドミウムオレンジ、カドミウムレモンイエロー、ベンジジンイエロー、ハンザイエローG、黄鉛メジアム、オーカー(黄土)、粗シエンナー、焼成シエンナー、粗アンバー、焼成アンバー、赤色酸化鉄、黄色酸化鉄、マラカイトグリーントーナー、クロムグリーンライト、ビリジアン、フタロシアニングリーン、ピーコックブルートーナー、パーマネントピーコックブルー、ビクトリアブルートーナー、紺青、群青、アルカリブルートーナー、P.T.A.バイオレットトーナー、硫化亜鉛、リトポン、亜鉛華、鉛白、酸化アンチモン、鉄黒等も使用できる。
【0023】
〔絵柄インキ層〕
絵柄インキ層3は、着色インキ層2の手前側に位置して、模様や文字等とパターン状の絵柄を表現する層である。絵柄インキ層の絵柄は任意であるが、絵柄としては、例えば、木目柄、石目柄、砂目柄、皮絞柄、文字、図形、幾何学模様等である。絵柄インキ層は、グラビア印刷、オフセット印刷等の方式で、上記着色インキ層形成前の透明熱可塑性樹脂シートの裏側とする面に対して印刷形成すれば良い。
絵柄インキ層に用いるインキは、成形性を備えれば、上記着色インキ層で述べたと同様の公知のインキを使用すれば良く、特に制限されるものでは無い。従って、絵柄インキ層に用いられるバインダーの樹脂、或いは着色剤等は重複する為、ここでは説明は省略する。なお、絵柄インキ層が表現する色は、着色樹脂成形物の色との色差を前記特定範囲内に収める必要は無い。
【0024】
〔透明接着剤層〕
透明接着剤層4は、加飾シートと着色樹脂成形物との接着性が不足する場合に、グラビア印刷等の公知の印刷法、或いはロールコート、スプレーコート等の公知の塗工法で形成する。透明接着剤層を、加飾シート積層前に、予め成形した着色樹脂成形物に形成しておく場合は、形成面が凹凸面の為、スプレーコート等で塗工すれば良い。
接着剤層を透明な層としておくことで、もしも接着剤層が着色している場合に、加飾シートが伸ばされた部分で、接着剤層の色によって加飾成形品の色が変化する悪影響が防げる。
【0025】
この透明接着剤層としては、着色インキ層と着色樹脂成形物との接着性、及び透明性、それに加飾シート側に形成しておく場合は更に成形性が有れば、特に制限は無く、それらを考慮して、熱可塑性樹脂、熱硬化性樹脂等の公知の樹脂の中から適宜選択使用する。なお、着色樹脂成形物側に予め形成しておく場合には、成形性は不要で、熱硬化性樹脂でも使用し易い。なお、透明接着剤層の厚さは、通常1〜10μm程度である。
【0026】
例えば、熱可塑性樹脂では、ポリ(メタ)アクリル酸メチル、ポリ(メタ)アクリル酸エチル、ポリ(メタ)アクリル酸ブチル等のアクリル樹脂、塩素化ポリプロピレン等の塩素化ポリオレフィン樹脂、酢酸ビニル樹脂、ポリアミド樹脂、或いは、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等のゴム系樹脂を1種又は2種以上の混合物で使用する。
また、熱硬化性樹脂では、フェノール樹脂、エポキシ樹脂、2液硬化型ウレタン樹脂等が用いられる。
【0027】
〔着色樹脂成形物〕
着色樹脂成形物Mとしては、着色インキ層との色差がCIEのL* a* b* 表色系を用いた色差式で30以下となる様な色に着色されている樹脂成形物であれば、特に制限は無く、使用する加飾シートとの組み合わせによる密着性、加飾成形品としての要求物性、コスト等を考慮して、公知の樹脂の中から適宜選択使用すれば良い。また、樹脂成形物を着色する着色剤としては、前述着色インキ層のところで述べた各種着色剤を使用できる。
【0028】
例えば、熱可塑性樹脂であれば、ABS(アクリロニトリル−ブタジエン−スチレン共重合体)樹脂、スチレン樹脂、アクリル樹脂、塩化ビニル樹脂、ポリカーボネート樹脂、或いはポリエチレン、ポリプロピレン、ポリブテン、ポリメチルペンテン、エチレン−プロピレン共重合体、エチレン−プロピレン−ブテン共重合体、オレフィン系熱可塑性エラストマー等のポリオレフィン系樹脂等を使用できる。また、硬化性樹脂であれば、2液硬化型の樹脂、例えば、ウレタン樹脂、不飽和ポリエステル樹脂、エポキシ樹脂等の未硬化樹脂液等を使用できる。なお、射出成形同時加飾方法に於いては、熱可塑性樹脂は加熱熔融して流動状態でキャビティ内に射出し冷却固化させる。また硬化性樹脂は(その未硬化物を)室温又は適宜加熱して流動状態で射出し、架橋、重合を行い固化させる。
【0029】
〔加飾シートの着色樹脂成形物への積層法〕
加飾シートを着色樹脂成形物の表面に積層し一体化して加飾成形品とする方法としては、射出成形同時加飾方法(特公昭50−19132号公報、特公昭43−27488号公報等参照)が代表的であるが、この他、例えば、特公昭56−45768号公報(オーバーレイ法)、特公昭60−58014号公報(真空プレス法)等に記載の所謂真空成形積層方法等のその他の公知の積層法でも良い。なかでも、射出成形同時加飾方法は、樹脂成形と加飾とを同時に1工程で出来、生産効率も良い等の点では好ましい方法である。積層法は、用意できる製造設備等に応じて選択すれば良い。
【0030】
例えば、本発明の加飾成形品を、射出成形同時加飾方法で得るには、射出成形同時加飾方法として従来公知の各種態様で得る事ができるが、その一態様として射出成形型を真空成形型と兼用して加飾シートの予備成形を行う態様で説明すれば、次の様になる。
【0031】
先ず、シート供給工程として、雌型及び雄型の雌雄一対の両型から成る加飾用成形型が、型開き状態の時に、加飾シートを型間に供給し、加飾シートを雌型に枠状のシートクランプで押圧して固定する。この際、加飾シートの接着面側は、射出樹脂側となる様にする事はもちろんである。
次いで、加熱軟化工程として、熱盤を型外部の退避位置から両型間に挿入し、加飾シートを加熱軟化させる。
次いで、延伸工程として、雌型の通気孔から吸引して加飾シートを延伸することで真空成形して、加飾シートを雌型のキャビティ面に沿わせ予備成形する。通常、真空成形工程としては、前記加熱軟化工程とこの延伸工程を少なくとも含む。
次いで、型締め工程として、熱盤を両型間から型外部の退避位置に退避させた後、両型を型締めする。
次いで、射出工程として、両型で形成さるキャビティに加熱熔融状態等の流動状態の着色された樹脂を充填する。
次いで、取出工程として、樹脂が冷却等により固化した後、型開きして成形物を取り出す。加飾シートの不要部分があればそれを適宜トリミングすれば、着色樹脂成形物の表面に加飾シートが積層一体化され加飾けされた、本発明の加飾成形品が得られる。
【0032】
【実施例】
以下、実施例及び比較例により本発明を更に詳述する。
【0033】
〔実施例1〕
次の様にして、図1の如き構成の加飾成形品Dを得た。先ず、加飾シートSとして、ポリメチルメタクリレートからなる無着色で透明なアクリル樹脂シート(厚さ125μm)を、透明熱可塑性樹脂シート1として用意した。そして、この透明熱可塑性樹脂シートの片面に、3色刷りによる木目柄の柄パターンを表現した絵柄インキ層3、全面の着色インキ層2(厚さ4μm)、全面の透明接着剤層4(厚さ4μm)の順に、グラビア印刷によって形成して加飾シートSとした。なお、絵柄インキ層に用いた着色剤は、弁柄、カーボンブラック、イソインドリノンを主成分として使用した。また、着色インキ層には、後述する射出樹脂の色に合わせて色出ししたインキとして、着色剤に弁柄、黄鉛、カーボンブラックを混合して褐色系のインキを使用した。着色インキ層と着色樹脂成形物との色差は、国際照明委員会(CIE)のL* a* b* 表色系を用いた色差式で、ΔE=10であった。
また、着色インキ層と絵柄インキ層のインキのバインダーの樹脂には、アクリル樹脂と塩化ビニル−酢酸ビニル共重合体との1対1重量比の混合樹脂系を用いた。また、透明接着剤層には、アクリル樹脂と塩化ビニル−酢酸ビニル共重合体との混合樹脂系を用いた。
【0034】
一方、射出樹脂には、着色剤として弁柄、黄鉛、カーボンブラックを混合添加した褐色系の耐熱ABS樹脂(耐熱温度95℃)を使用した。
【0035】
また、目的とする加飾成形品としては、車両内装用のパネルで、幅40mm、長さ400mm、肉厚3mmの製品を選んだ。
【0036】
そして、射出成形同時加飾方法によって、前記加飾シートを着色樹脂成形物の成形と同時にその表面に積層して一体化し、図1に示す如き、加飾シートS(の全層)が着色樹脂成形物Mの表面に積層された構成の本発明の加飾成形品Dを得た。
なお、射出成形同時加飾方法は、加飾シートは射出成形型を真空成形型として兼用する態様で行った。先ず、加飾シートを、型間に供給後、非接触型の熱盤でシート温度110℃まで加熱し軟化させた後、雌型内から真空吸引して、雌型を利用した真空成形による予備成形を行って、雌型のキャビティ面形状に加飾シートを沿わせた。その後、金型温度70℃で、雄型側のゲートから樹脂温度240℃に加熱溶融した着色ABS樹脂を射出した。そして、樹脂が冷却固化した後、型開きして、加飾シートSが着色樹脂成形物Mの表面に積層一体化した加飾成形品Dを得た。
【0037】
加飾成形品Dは、加飾シートSが2倍程度伸ばされた部分もあったが、着色樹脂成形物と着色インキ層との色差が色差式で10と少ないので、加飾成形品としての色ムラ、すなわち加飾成形品上に於いて加飾シートの伸びの最も大きい成形品角部の色とその周辺部の色との差が、角部の色の変化として、目視で判別出来なかった。この為、加飾成形品は製品として良品となった。
【0038】
〔実施例2〕
実施例1において、着色インキ層側の着色剤の配合を変えて、着色インキ層と着色樹脂成形物との色差を調整して、色差式でΔE=28に設定した加飾シートを使用した他は、実施例1と同様にして加飾成形品を得た。
その結果、実施例1同様に、加飾成形品は成形品角部の色ムラを目視で判別出来ず、製品として良品となった。
【0039】
〔比較例〕
実施例1において、着色インキ層側の着色剤の配合を変えて、着色インキ層と着色樹脂成形物との色差を調整して、色差式でΔE=35に設定した加飾シートを使用した他は、実施例1と同様にして加飾成形品を得た。
その結果、加飾成形品は成形品角部の色ムラが目視で判別出来、製品として不良品となった。
【0040】
【発明の効果】
▲1▼本発明の加飾成形品によれば、着色インキ層と着色樹脂成形物との色がほぼ同じなので、加飾シートが着色樹脂成形物の表面形状に追従して積層一体化させる過程で、加飾シートが伸びた部分、すなわち、隠蔽性が低下する部分では、加飾シートを透過して着色樹脂成形物の色が加飾シートの色に混色されるが、混色される色同士は概ね同色の為、加飾成形品が表現する色の変化を少なくする事ができる。また、着色樹脂成形物の色が、ロット間、或いはロット内でバラツいて多少違っても、着色インキ層がカバーし影響を少なくする事ができる。
▲2▼また、絵柄インキ層も設ければパターン柄が表現でき、より高意匠の加飾成形品にできる。
▲3▼また、透明接着剤層も設ければ、接着剤層は透明であるので、接着剤層によって加飾成形品が表現する色に影響を及ぼす事無く、加飾シートと着色樹脂成形物との密着性を向上できる。
【図面の簡単な説明】
【図1】本発明の加飾成形品の或る一形態を例示する断面図。
【符号の説明】
1 透明熱可塑性樹脂シート
2 着色インキ層
3 絵柄インキ層
4 透明接着剤層
D 加飾成形品
M 着色樹脂成形物
S 加飾シート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a decorative molded product in which a decorative sheet is laminated and integrated on the surface of a resin molded product. In particular, in a decorative molded product that is formed by stretching and decorating a decorative sheet by a simultaneous injection molding method, etc., the color change of the stretched decorative sheet is not noticeable. Related to decorative molded products.
[0002]
[Prior art]
Conventionally, a decorative molded product in which the surface of a resin molded product is decorated has been used for various purposes. For example, in the injection molding simultaneous decorating method disclosed in Japanese Patent Publication No. 50-19132 and the like, the decorative sheet is decorated by laminating and integrating a decorative sheet on the surface simultaneously with the molding of the resin molding. A molded product is obtained. In addition, this is a method by the injection molding simultaneous lamination method of the injection molding simultaneous decoration methods.
[0003]
[Problems to be solved by the invention]
By the way, the pattern expressed by the decorative sheet laminated on the surface of the resin molded product is usually a pattern ink layer having a pattern pattern on the front side (viewer side) of the base color by the colored ink layer formed over the entire surface. In many cases, a design of a desired color is expressed. In the decorative molded product, when the decorative sheet is laminated and integrated on the surface of the resin molded product, the decorative sheet is usually stretched and molded and laminated and integrated. For this reason, since the decorative sheet of the stretched part becomes thin, the color of the pattern changes, and if the change is large, it may not be realized as a product. For this reason, in the conventional decorative molded product, for example, the following measures have been taken so that the color change of the stretched decorative sheet does not occur as much as possible and is not noticeable even if it occurs. It was.
[0004]
(1) For example, in a resin molded product obtained by injection molding, this is colored as a colored resin molded product, and the color of the colored resin molded product is used as a base color. The decorative molded product has a configuration in which a decorative sheet in which a pattern ink layer is formed on a transparent resin sheet is laminated and integrated with the colored resin molded product. Therefore, a coloring agent such as a pigment is added to the molding resin to color the resin molding.
[0005]
(2) Alternatively, the background color is also expressed on the decorative sheet side. For this reason, a colored resin sheet is used as the base sheet of the decorative sheet. Then, a pattern ink layer is printed on the front side of the colored resin sheet to express the pattern. Usually, a decorative sheet having a structure in which a transparent resin sheet is laminated as a protective layer on the colored ink layer is often used (see Japanese Patent Publication No. 61-17255).
[0006]
However, in the decorative molded product having the structure of (1) above, if the colorant is added to the colored resin molded product for each lot (or for each molding shot even within the same lot), the added amount (or blending ratio) ) If the color of the colored resin molded product changes slightly due to changes or variations in the dispersion state, etc., the pattern color of the product (decorative molded product) will be affected as it is, and depending on the degree, it may not be a product. there were.
[0007]
In addition, in the decorative molded product having the above configuration (2), since the base sheet (usually 0.1 to 0.5 mm in thickness) is colored, the color of the resin molded product (in this case, the color is It is not always necessary to use it as the base color of the pattern of the product, even if the influence of light from the back side is eliminated or the color of the product may be changed to black for other purposes. Does not affect the color. However, as described above, since the resin sheet usually has two layers of the base material sheet and the transparent resin sheet, the cost increases. In addition, since the total thickness of the decorative sheet becomes thicker and it becomes difficult to cut, it becomes difficult to trim and handle unnecessary portions (for example, surroundings and internal window portions) after being integrated with the resin molded product.
[0008]
Therefore, the subject of the present invention is a decorative molded product obtained by stretching and decorating a decorative sheet by a simultaneous injection molding method or the like, and laminating and integrating it on the surface of a resin molded product. It is to make the color change less noticeable.
[0009]
[Means for Solving the Problems]
Therefore, in order to solve the above problems, a decorative sheet comprising a transparent thermoplastic resin sheet and a colored ink layer formed over the entire back surface of the transparent thermoplastic resin sheet is provided on the surface of the colored resin molded article. The color ink layer side is laminated and integrated so that the colored resin molded product side faces, and the color difference between the colored ink layer and the colored resin molded product is determined by the International Lighting Commission's L * a * b * color system. The color difference formula is set to 30 or less.
With such a configuration, since the color of the colored ink layer and the colored resin molded product are almost the same, the decorative sheet is laminated and integrated following the surface shape of the colored resin molded product. In the part where the color is extended, that is, in the part where the concealability is lowered, the color of the colored resin molded product is mixed with the color of the decorative sheet through the decorative sheet, but the mixed colors are almost the same color. The color change expressed by the decorative molded product can be reduced. Moreover, even if the color of the colored resin molding varies between lots or within lots, the colored ink layer covers and the influence can be reduced.
[0010]
Moreover, the decorative molded product of the present invention has a configuration in which a pattern ink layer is further provided between the transparent thermoplastic resin sheet and the colored ink layer in the decorative molded product.
By adopting such a configuration, the pattern pattern is expressed by the pattern ink layer, and the decorative molded product can have a higher design.
[0011]
Moreover, the decorative molded product of the present invention has a configuration in which any one of the above-described decorative molded products further has a transparent adhesive layer between the colored ink layer and the colored resin molded product.
With such a configuration, the adhesive layer is transparent, so the adhesive layer improves the adhesion between the decorative sheet and the colored resin molded product without affecting the color expressed by the decorative molded product. it can.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, FIG. 1 is sectional drawing which illustrates a certain form with the decorative molded product of this invention.
[0013]
〔Layer structure〕
The layer structure of the decorative sheet S used in the decorative molded product of the present invention is, as a minimum, a transparent thermoplastic resin sheet 1 and a
[0014]
〔Color difference〕
In the decorative molded product of the present invention, in the above layer structure, the color difference between the
The color represented by the decorative molded product is, of course, a colored ink layer, a colored resin molded product, a colored resin molded product, or the color of the resin sheet when the transparent thermoplastic resin sheet is colored. Is the combined color.
[0015]
In addition to the color difference formula using the CIE L * a * b * color system, the color difference formula using the CIE L * u * v * color system, Hunter The color difference formula using the Lab color system, or the color difference formula of FMC (Friele, MacAdam, Chicken) -II, or the like may be used. CIE defines both the color system and the color difference formula. The color difference formula using the L * a * b * color system or the L * u * v * color system is also adopted as a color difference in JIS Z 8730.
[0016]
However, in that case, the upper limit value of the color difference allowable in the present invention varies depending on the color difference formula employed. However, in any case, the effect of the present invention can be obtained by setting the color difference to a value corresponding to 30 or less in the color difference formula of the L * a * b * color system of the International Commission on Illumination (CIE). Is obtained.
[0017]
[Transparent thermoplastic resin sheet]
The transparent thermoplastic resin sheet 1 is made of a thermoplastic resin sheet so that it can be molded by following the decorative sheet on the uneven surface, and the color of the colored ink layer below can be seen. To be transparent. The term “transparent” includes translucent. Moreover, it is good also as colored transparency by the coloring agent addition etc. which are described in the coloring ink layer mentioned later. And a transparent thermoplastic resin sheet becomes a support body sheet | seat with respect to a lower colored ink layer, a pattern ink layer, etc., and also becomes these protective layers.
The material for the transparent thermoplastic resin sheet is not particularly limited as long as it has the above characteristics. For example, in general, poly (meth) methyl acrylate, poly (meth) ethyl acrylate, poly (meth) butyl acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, polyacrylonitrile Such as acrylic resin [(meth) acryl means acrylic or methacryl], polyethylene, polypropylene, polymethylpentene, ethylene-propylene copolymer, ethylene-propylene-butene copolymer, olefin-based thermoplastic elastomer, etc. Polyolefin resins, polyethylene terephthalate, polybutylene terephthalate, thermoplastic polyester resins such as ethylene-isophthalate-terephthalate copolymer, fluororesins such as polyvinyl fluoride, polyvinylidene fluoride, ethylene-4 fluoroethylene copolymer, poly Boneto, vinyl chloride resin, AS (acrylonitrile - styrene copolymer) resin, ABS (acrylonitrile - butadiene - styrene copolymer) resin sheet made of a resin or the like can be used. The thickness of the transparent thermoplastic resin sheet is not particularly limited, but is generally about 30 to 200 μm.
[0018]
In addition, in the transparent thermoplastic resin sheet, if necessary, lubricants such as wax, lubricants composed of particles such as silica and spherical α-alumina, benzotriazole series, benzophenone series, fine particle cerium oxide series, etc. Various additives such as light stabilizers such as UV absorbers, hindered amine radical scavengers, plasticizers, stabilizers and the like may be added to adjust the physical properties.
[0019]
[Colored ink layer]
The
In addition, although a coloring ink layer shall usually be about 3-5 g / m < 2 > by application amount, it is not limited to this. If the coating amount is too small, sufficient concealing property cannot be obtained, and conversely, if the coating amount is too large, the cost is increased.
[0020]
The
[0021]
For example, as the binder resin, one or two or more kinds of usually thermoplastic resins such as acrylic resin, chlorinated polypropylene, vinyl chloride-vinyl acetate copolymer, urethane resin, polyester resin, polyamide resin, etc. Use a mixture. Moreover, if the moldability is satisfied by stacking and integrating decorative sheets before complete curing, a thermosetting resin such as a two-component curable urethane resin can also be used.
[0022]
The colorant is expressed with no particular limitation except that the color difference from the colored resin molding is a colorant that can be 30 or less in the color difference formula using the CIE L * a * b * color system. A known colorant may be used depending on the color. For example, as a colorant, carbon black, titanium white (anatase type, rutile type), petal, cadmium red, chrome yellow, inorganic pigments such as cobalt blue, organic pigments such as quinacridone, isoindolinone, and phthalocyanine blue (or Dyes), metallic pigments made of foil powder such as aluminum and brass, pearlescent pigments made of titanium dioxide-coated mica foil powder, etc., or a mixture of two or more.
Examples of the colorant include Risol Maroon Toner, Alizarin Lake B, Cadmium Maroon, B.I. O. N. Red Toner (5B), Calcium Resol Toner, Barium Resol Toner, Pigment Scarlet, B.I. O. N. Red Toner (Y), Risor Rubin, Brilliant Red Lake R, Lake Red C Barium Toner, Red Tan, Sodium Resor Toner, Toluidine Toner Light, Cadmium Red Light, Rhodamine Toner B, Rhodamine Toner Y, Para Red Toner Light, Chlorinated Para Red Toner, Chrome Vermillion, Bronze Orange, Dinitroaniline Orange, Benzidine Orange, Red Mouth Lead, Cadmium Orange, Cadmium Lemon Yellow, Benzidine Yellow, Hansa Yellow G, Yellow Lead Medium, Ocher (Ocher), Crude Sienna, Firing Sienna, Crude amber, baked amber, red iron oxide, yellow iron oxide, malachite green toner, chrome green light, viridian, phthalocyanine green, peacock Tona, permanent peacock blue, Victoria Blue toe toner, Prussian blue, ultramarine blue, alkali blue toe toner, P. T.A. A. Violet toner, zinc sulfide, lithopone, zinc white, lead white, antimony oxide, iron black, etc. can also be used.
[0023]
[Pattern ink layer]
The
The ink used for the pattern ink layer is not particularly limited as long as it has moldability and may be a known ink similar to that described for the colored ink layer. Accordingly, the binder resin or the colorant used for the pattern ink layer is duplicated, and the description thereof is omitted here. The color expressed by the pattern ink layer does not have to fall within the specific range with respect to the color difference of the colored resin molded product.
[0024]
(Transparent adhesive layer)
The transparent adhesive layer 4 is formed by a known printing method such as gravure printing or a known coating method such as roll coating or spray coating when the adhesion between the decorative sheet and the colored resin molding is insufficient. In the case where the transparent adhesive layer is formed on a colored resin molded product formed in advance before the decorative sheet is laminated, the surface to be formed may be applied by spray coating or the like because the formed surface is an uneven surface.
By setting the adhesive layer as a transparent layer, if the adhesive layer is colored, the color of the decorative molded product changes depending on the color of the adhesive layer at the stretched decorative sheet Can be prevented.
[0025]
As this transparent adhesive layer, there is no particular limitation as long as it has further moldability when it is formed on the decorative sheet side, as well as adhesion between the colored ink layer and the colored resin molded product, and transparency. Considering these, it is appropriately selected from known resins such as thermoplastic resins and thermosetting resins. In addition, when forming beforehand in the colored resin molding side, moldability is unnecessary and it is easy to use a thermosetting resin. In addition, the thickness of a transparent adhesive bond layer is about 1-10 micrometers normally.
[0026]
For example, for thermoplastic resins, acrylic resins such as poly (meth) methyl acrylate, poly (meth) ethyl acrylate and poly (meth) butyl acrylate, chlorinated polyolefin resins such as chlorinated polypropylene, vinyl acetate resins, polyamides A resin or a rubber-based resin such as polyisoprene rubber, polyisobutyl rubber, and styrene butadiene rubber is used in one kind or a mixture of two or more kinds.
As the thermosetting resin, a phenol resin, an epoxy resin, a two-component curable urethane resin, or the like is used.
[0027]
[Colored resin moldings]
The colored resin molded product M may be any resin molded product colored in a color such that the color difference with the colored ink layer is 30 or less in the color difference formula using the CIE L * a * b * color system. There is no particular limitation, and it may be appropriately selected and used from known resins in consideration of adhesion by combination with the decorative sheet to be used, required physical properties as a decorative molded product, cost, and the like. Moreover, as a coloring agent which colors a resin molding, the various coloring agents described in the above-mentioned colored ink layer can be used.
[0028]
For example, in the case of a thermoplastic resin, ABS (acrylonitrile-butadiene-styrene copolymer) resin, styrene resin, acrylic resin, vinyl chloride resin, polycarbonate resin, or polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-propylene copolymer. A polyolefin resin such as a polymer, an ethylene-propylene-butene copolymer, and an olefin thermoplastic elastomer can be used. Moreover, if it is curable resin, 2 liquid curable type resin, for example, uncured resin liquids, such as a urethane resin, unsaturated polyester resin, an epoxy resin, etc. can be used. In the injection molding simultaneous decorating method, the thermoplastic resin is heated and melted and injected into the cavity in a fluid state to be cooled and solidified. Further, the curable resin (the uncured product) is injected at room temperature or appropriately in a fluid state, and is solidified by crosslinking and polymerization.
[0029]
[Lamination method of decorative sheet to colored resin molding]
As a method of laminating a decorative sheet on the surface of a colored resin molding and integrating it into a decorative molded product, a simultaneous injection molding method (see Japanese Patent Publication Nos. 50-19132, 43-27488, etc.) In addition, for example, other methods such as the so-called vacuum forming lamination method described in Japanese Patent Publication No. 56-45768 (overlay method), Japanese Patent Publication No. 60-58014 (vacuum press method), etc. A known lamination method may be used. Among these, the injection molding simultaneous decorating method is a preferable method in that resin molding and decorating can be simultaneously performed in one step, and production efficiency is good. The lamination method may be selected according to the production equipment that can be prepared.
[0030]
For example, in order to obtain the decorative molded product of the present invention by the injection molding simultaneous decoration method, it can be obtained in various conventionally known modes as the injection molding simultaneous decoration method. If it explains in the aspect which performs the preforming of a decoration sheet combining also with a shaping | molding die, it will become as follows.
[0031]
First, as a sheet supply process, when a decorative mold composed of both a female mold and a male and female pair is in a mold open state, the decorative sheet is supplied between the molds, and the decorative sheet is converted into a female mold. Press and fix with a frame-shaped sheet clamp. At this time, it is needless to say that the bonding surface side of the decorative sheet is the injection resin side.
Next, as a heat softening step, a hot platen is inserted between both molds from the retreat position outside the mold, and the decorative sheet is heated and softened.
Next, as a stretching step, vacuuming is performed by drawing the decorative sheet by suction from the female vent, and preforming the decorative sheet along the cavity surface of the female mold. Usually, the vacuum forming step includes at least the heat softening step and the stretching step.
Next, as a mold clamping process, the hot platen is retracted from between both molds to a retreat position outside the mold, and then both molds are clamped.
Next, as an injection process, a colored resin in a fluidized state such as a heat-melted state is filled in a cavity formed by both molds.
Next, as a removing step, after the resin is solidified by cooling or the like, the mold is opened and the molded product is taken out. If there is an unnecessary portion of the decorative sheet, it is appropriately trimmed to obtain the decorative molded product of the present invention in which the decorative sheet is laminated and integrated on the surface of the colored resin molded product.
[0032]
【Example】
Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
[0033]
[Example 1]
A decorative molded product D having the structure shown in FIG. 1 was obtained as follows. First, as the decorative sheet S, an uncolored and transparent acrylic resin sheet (thickness: 125 μm) made of polymethyl methacrylate was prepared as the transparent thermoplastic resin sheet 1. Then, on one side of this transparent thermoplastic resin sheet, a
A mixed resin system of acrylic resin and vinyl chloride-vinyl acetate copolymer in a 1 to 1 weight ratio was used as the binder resin for the ink of the colored ink layer and the pattern ink layer. Further, a mixed resin system of an acrylic resin and a vinyl chloride-vinyl acetate copolymer was used for the transparent adhesive layer.
[0034]
On the other hand, as the injection resin, a brown heat-resistant ABS resin (heat-resistant temperature 95 ° C.) to which a petal, chrome lead, and carbon black were added as a colorant was used.
[0035]
Moreover, as a target decorative molded product, a product having a width of 40 mm, a length of 400 mm, and a thickness of 3 mm was selected as a vehicle interior panel.
[0036]
Then, by the simultaneous injection molding method, the decorative sheet is laminated and integrated on the surface simultaneously with the molding of the colored resin molding, and the decorative sheet S (all layers) is colored resin as shown in FIG. The decorative molded product D of the present invention having a configuration laminated on the surface of the molded product M was obtained.
In addition, the injection molding simultaneous decorating method was performed in a mode in which the decorative sheet also used the injection mold as a vacuum mold. First, after the decorative sheet is supplied between the molds, the sheet is heated to a sheet temperature of 110 ° C. with a non-contact type heating plate and softened, and then vacuum suction is performed from the female mold, so that a preliminary by vacuum forming using the female mold is performed. Molding was performed, and the decorative sheet was aligned with the cavity surface shape of the female mold. Thereafter, a colored ABS resin heated and melted to a resin temperature of 240 ° C. was injected from the male side gate at a mold temperature of 70 ° C. Then, after the resin was cooled and solidified, the mold was opened, and a decorative molded product D in which the decorative sheet S was laminated and integrated on the surface of the colored resin molded product M was obtained.
[0037]
Although the decorative molded product D had a portion in which the decorative sheet S was stretched about twice, the color difference between the colored resin molded product and the colored ink layer is as small as 10 in the color difference formula, Color unevenness, that is, the difference between the color of the corner of the molded product with the largest elongation of the decorative sheet on the decorative molded product and the color of the periphery cannot be visually determined as a change in the color of the corner. It was. For this reason, the decorative molded product became a good product as a product.
[0038]
[Example 2]
In Example 1, the coloring agent on the colored ink layer side was changed to adjust the color difference between the colored ink layer and the colored resin molded product, and the decorative sheet set to ΔE = 28 in the color difference formula was used. Gave a decorative molded product in the same manner as in Example 1.
As a result, as in Example 1, the decorative molded product could not be visually distinguished from the color unevenness at the corner of the molded product, and was a good product as a product.
[0039]
[Comparative example]
In Example 1, the coloring agent on the colored ink layer side was changed to adjust the color difference between the colored ink layer and the colored resin molded product, and the decorative sheet set to ΔE = 35 in the color difference formula was used. Gave a decorative molded product in the same manner as in Example 1.
As a result, in the decorative molded product, the color unevenness at the corners of the molded product could be visually determined, and the product became a defective product.
[0040]
【The invention's effect】
(1) According to the decorative molded product of the present invention, since the color of the colored ink layer and the colored resin molded product is substantially the same, the decorative sheet is laminated and integrated following the surface shape of the colored resin molded product. In the portion where the decorative sheet is extended, that is, the portion where the concealing property is lowered, the color of the colored resin molded product is mixed with the color of the decorative sheet through the decorative sheet, but the colors to be mixed Since they are almost the same color, the color change expressed by the decorative molded product can be reduced. Moreover, even if the color of the colored resin molding varies between lots or within lots, the colored ink layer covers and the influence can be reduced.
{Circle around (2)} If a pattern ink layer is also provided, a pattern can be expressed, and a decorative molded product with a higher design can be obtained.
(3) If a transparent adhesive layer is also provided, the adhesive layer is transparent, so that the decorative sheet and the colored resin molded product are not affected by the adhesive layer without affecting the color expressed by the decorative molded product. Adhesion with can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a certain form of a decorative molded product of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Transparent
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP10528199A JP4357631B2 (en) | 1999-04-13 | 1999-04-13 | Decorative molded products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP10528199A JP4357631B2 (en) | 1999-04-13 | 1999-04-13 | Decorative molded products |
Publications (2)
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JP2000289178A JP2000289178A (en) | 2000-10-17 |
JP4357631B2 true JP4357631B2 (en) | 2009-11-04 |
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JP10528199A Expired - Fee Related JP4357631B2 (en) | 1999-04-13 | 1999-04-13 | Decorative molded products |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5050296B2 (en) * | 2001-01-19 | 2012-10-17 | 大日本印刷株式会社 | Decorative sheet, injection molding simultaneous decoration method, and decorative molded product |
EP1435285A4 (en) * | 2001-10-10 | 2006-03-15 | Sakaeriken Kogyo Co Ltd | Method for producing plastic molding with texture pattern |
DE10236810A1 (en) * | 2002-08-10 | 2004-02-26 | Leonhard Kurz Gmbh & Co. Kg | Decorative component, especially a mobile telephone housing, comprises a base member with a surface decorative element, with a transparent structured layer |
JP3718496B2 (en) * | 2002-11-13 | 2005-11-24 | 帝国インキ製造株式会社 | Insert molded product |
JP5772019B2 (en) * | 2011-02-03 | 2015-09-02 | セイコーエプソン株式会社 | Image processing apparatus and image processing method |
JP6226544B2 (en) * | 2013-04-03 | 2017-11-08 | 日本カーバイド工業株式会社 | Decorative seat for motorcycle |
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1999
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