JPS631172B2 - - Google Patents
Info
- Publication number
- JPS631172B2 JPS631172B2 JP11617480A JP11617480A JPS631172B2 JP S631172 B2 JPS631172 B2 JP S631172B2 JP 11617480 A JP11617480 A JP 11617480A JP 11617480 A JP11617480 A JP 11617480A JP S631172 B2 JPS631172 B2 JP S631172B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- molded product
- mold
- transfer
- plastic molded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000012546 transfer Methods 0.000 claims description 88
- 239000010410 layer Substances 0.000 claims description 72
- 239000004033 plastic Substances 0.000 claims description 43
- 229920003023 plastic Polymers 0.000 claims description 43
- 238000000465 moulding Methods 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 31
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000001954 sterilising effect Effects 0.000 claims description 4
- 239000000077 insect repellent Substances 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- 239000006224 matting agent Substances 0.000 claims description 2
- 238000010422 painting Methods 0.000 description 12
- 239000010408 film Substances 0.000 description 9
- 238000007639 printing Methods 0.000 description 8
- 230000037303 wrinkles Effects 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000007646 gravure printing Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007645 offset printing Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- LLEMOWNGBBNAJR-UHFFFAOYSA-N biphenyl-2-ol Chemical compound OC1=CC=CC=C1C1=CC=CC=C1 LLEMOWNGBBNAJR-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010017 direct printing Methods 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 238000010023 transfer printing Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000004727 Noryl Substances 0.000 description 1
- 229920001207 Noryl Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000986 disperse dye Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- 235000010292 orthophenyl phenol Nutrition 0.000 description 1
- 239000004306 orthophenyl phenol Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
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
- B29C45/1418—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 inserts being deformed or preformed, e.g. by the injection pressure
-
- 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
- B29C45/14827—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 using a transfer foil detachable from the insert
-
- 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
- B29C45/1418—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 inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14286—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 inserts being deformed or preformed, e.g. by the injection pressure means for heating the insert
Description
本発明はプラスチツクス成型品、殊に立ち上が
りの高い複雑な立体曲面を有するプラスチツクス
成型品の成型加工と同時にそのプラスチツクス成
型品の表面に転写絵付を行う絵付プラスチツクス
成型品の製造方法に関するものであり、その目的
とするところはクラツクやしわ等のない美麗な図
柄を有するプラスチツクス成型品を容易な工程で
製造し得る方法を提供せんとするところにある。
近年、プラスチツクス成型品に対する印刷によ
る絵付は装飾効果を高めること等を目的としてテ
レビ、ラジオ、クーラー等のキヤビネツト類への
木目模様の形成、化粧品容器、家庭用電化製品、
玩具類への多色模様の形成等に広く利用されてい
る。これらの方法としてプラスチツクス成型品の
成型加工と同時にその立体曲面に転写絵付を行う
方法は公知である。例えば射出成型機の成型用金
型の内部に転写シートを模様層が内側になるよう
に且つ金型内の所定の位置に合致するように適宜
の手段により装着せしめ、しかる後金型を密閉し
成型用金型の射出型より金型内に成型用樹脂を充
填して所定の成型品を成型すると同時に転写絵付
を行い、その後金型内より成型品を取り出しその
際転写面からベースシートを剥離してなる成型同
時絵付法がある。この方法は従来から行われてき
た方法、即ちプラスチツクス成型品を成型加工し
た後、直接印刷或るいは転写印刷によつてプラス
チツクス成型品の表面に絵付をする方法より少な
い工程で作業性よく様々な装飾効果を高めること
が可能である等多くの利点が挙げられる。しかし
ながらこの成型同時絵付法においては複雑な形状
を有するプラスチツクス成型品、殊に立ち上がり
の高い複雑な立体曲面を有するプラスチツクス成
型品に対しては適用することができず、前記した
従来からの方法、即ち成型加工後シルクスクリー
ン印刷、オフセツト印刷、グラビア・オフセツト
印刷等の直接印刷或るいは転写印刷に頼つている
のが現状である。何故なら前記したような立ち上
がりの高い複雑な立体曲面を有するプラスチツク
ス成型品の成型加工と同時にそのプラスチツクス
成型品の表面に転写絵付を行う方法においては美
麗な図柄を転写絵付することが不可能だからであ
る。即ち前記成型同時絵付法においては金型を密
閉した際に転写シートは金型内表面に沿つていな
いため、成型用樹脂の充填時の瞬間的な成型用樹
脂の射出圧によつて転写シートに局部的に大きな
張力がかかり、特に立ち上がりの高い部分及び転
写シートが金型によつて支持されている部分に大
きな張力がかかりその部分にクラツクが生じた
り、又前記部分の影響を受けて他の部分にしわが
生じたりして、プラスチツクス成型品の表面に美
麗な転写絵付を行うことは非常に困難だからであ
る。又、金型を密閉する際に転写シートが金型内
表面の凸部によつて局部的に押し込まれ或る程度
まで金型内表面に沿わせられることもあり、成型
用樹脂を充填する前、既に転写シートにクラツ
ク、しわ等が生じており、それが成型品における
図柄のクラツクやしわ等の原因となるという欠点
もあつた。
また前記成型同時絵付法の改良法として、転写
シートを予め金型により成型用受け型の内面に合
致する形状に成型し、これを成型用受け型内に装
着し、この中に樹脂を供給することによつて成型
と同時に絵付する方法が知られている（特公昭51
―33456号公報参照）。しかしこの方法においても
転写シートを予め金型により成型するため転写シ
ートに局部的な張力がかかることは避け得ず、樹
脂を供給する前に既に転写シートにクラツク、し
わ等が生じ、それが成型品における図柄のクラツ
クやしわ等の原因になるという欠点は依然解決し
得ていない。また、この方法では予め成型した転
写シートを別の成型用受け型内に装着する必要が
あるため、成型品が複雑な形状の場合には成型加
工上、種々の欠点が派生するという欠点もあつ
た。
本発明者等は前記諸点に鑑み種々考察の結果、
金型を密閉する前に予め転写シートを受け型内表
面に弾性体により完全に沿わせ熱成型しておけば
諸欠点を解消し得ることを見出し、かかる知見に
基づき、更にその熱成型する手段について研究、
実験を重ねた結果、本発明を完成するに至つたも
のである。即ち本発明は熱成型可能なベースシー
ト１上に転写層２を形成してなる転写シート３
を、前記ベースシート１側と成型用金型４の受け
型５の内表面側とを向かい合わせて載置した後、
弾性のゴム状物、中空の弾性袋状物、弾性スポン
ジ状態、弾性ゲル状物等よりなる群から選ばれた
ひとつの弾性体６を用いて前記転写シート３の転
写層２側から押圧して加熱により前記受け型５の
内表面に前記ベースシート１側が接するように転
写シート３を沿わせ、その後前記弾性体６を除去
し、前記転写シート３を受け型５の内表面に沿わ
せたまま前記金型４を密閉した後前記金型４の射
出型７より成型用樹脂８を充填して所定の成型品
を成型し、しかる後金型４内より絵付されたプラ
スチツクス成型品９を取り出すことを特徴とする
絵付プラスチツクス成型品の製造方法である。
以下本発明を図面に基づいて詳細に説明する。
本発明に係る方法において、転写シート３とし
ては、ベースシート１上に、剥離層１０、模様層
１１等を順次積層した転写層２を形成したもので
あればいずれのものでも使用することができる
（第１図参照）。
転写シート３に使用するベースシート１は熱成
型可能で延伸性に優れたフイルム、例えばナイロ
ンフイルム、ポリプロピレンフイルム、ポリエチ
レンフイルム、フツ素系フイルム等の延伸性に優
れた無延伸フイルム等が好適である。
剥離層１０としては前記ベースシート１から剥
離可能な樹脂組成物を用いて形成する。ベースシ
ート１に予め離型処理を施しておけば剥離層１０
は必ずしも必要としないが、この剥離層１０は、
完成した成型品において模様層１１を保護するた
めの表面保護被膜層となるため設けておく方がよ
り好ましい。
模様層１１としては成型用樹脂８と相溶性のあ
る樹脂をバインダーとした印刷用インキを用い
て、前記剥離層１０上全面又は部分的に所望の図
柄を印刷して形成する。形成する手段としてはグ
ラビア印刷、オフセツト印刷、スクリーン印刷等
通常の印刷方法にて行うことができる。前記印刷
用インキの着色剤として熱移行性染料、例えば分
散染料、油溶性染料等を用いてもよい。この場
合、前記剥離層１０は熱移行性染料によつて染着
可能な樹脂組成物を用いて形成しておけばよい。
尚、前記模様層１１を形成するに際しては、成型
加工時の図柄の変形を考慮して調整した図柄を形
成しておくことが好ましい。
又、前記模様層１１と成型用樹脂８との接着性
が弱い場合には、前記模様層１１を形成した上
に、成型用樹脂８と接着性のある樹脂組成物を用
いて接着剤層１２を形成してもよい。
本発明に係る方法において使用する転写シート
３は前記した層構成からなるものを基本的な型と
するものであるが、前記模様層１１を形成した
後、真空蒸着法、スパツタリング法等を用いて金
属膜層１３を形成すると、プラスチツクス成型品
表面に金属光沢を有する図柄を現出することがで
きる（第２図参照）。
又、プラスチツクス成型品表面に艶消し状の木
目模様或るいは多色模様を必要とする場合、ベー
スシート１の転写層２を形成する面に全面或るい
は部分的にマツト剤層１４及び／又はエンボス層
１５を形成してもよい（第３図参照）。
更に転写層中に防虫殺菌層を形成してもよい。
形成する方法としては転写層中のいずれかの一層
に、インキ固型物の３重量％のオルソ・フエニ
ル・フエノールを含有せしめるとよい。或るいは
新たに一層、防虫殺菌層を設けてもよい。このよ
うにすると容易に防虫殺菌効果を有するプラスチ
ツクス成型品を得ることができる。
尚、本発明に係る方法において使用する転写シ
ート３は、立ち上がりが高く複雑な立体曲面を型
取る金型４内表面にクラツク、しわ等発生するこ
となく完全に沿わせる必要のあることから、本出
願人が既に出願した転写シート（実願昭55―
10901号、実願昭55―97527号参照）即ち転写層の
樹脂分として全てエラストマーを用いることを特
徴とする転写シートを使用すると、弾性体の押圧
時における転写シートの変形が極めて均一に進
み、しかも均一に変形するため特に好ましい。
成型加工時においては、まず前記構成からなる
転写シート３を、ベースシート１側と受け型５の
内表面側とが向かいあうように載置する（第４図
参照）。
次に弾性体６を用いて前記転写シート３の転写
層２側から押圧すると同時に転写シート３を加熱
し、受け型５の内表面に転写シート３を完全に沿
わせる（第５図参照）。前記弾性体６としてはシ
リコンゴム、フツ素ゴム等の弾性ゴム状物、中空
の弾性袋状物、弾性スポンジ状物、弾性ゲル状物
等の、転写シートを受け型の内表面に完全に沿わ
せることができるものを用いる。前記転写シート
３を加熱するのは、転写シート３を受け型５の内
表面に合致するように熱成型するためである。こ
の際の加熱温度はベースシート１が熱成型可能と
なるとともに転写層２が弾性体６に転移しない温
度に設定する必要がある。加熱方法としては受け
型５を予熱しておくか、弾性体６を予熱しておく
か又はその両方を予熱しておく。或るいは予め直
接転写シート３を加熱してもよい。
その後、弾性体６を取り除く。その際転写シー
ト３は既に熱成型されているので受け型５の内表
面に沿つた状態を保つ（第６図参照）。
しかる後金型４を密閉し、射出型７より成型用
樹脂８を充填して所定の成型品を成型する（第７
図参照）。成型完了後、絵付されたプラスチツク
ス成型品９を取り出す。その際、ベースシート１
はプラスチツクス成型品を取る時に或るいはプラ
スチツクス成型品を取り出した後、剥離する。こ
のようにすることによつて成型加工と転写絵付と
が同時に完了し、美麗な図柄を有するプラスチツ
クス成型品を得ることができる（第８図参照）。
本発明はこのような構成であるから次のような
効果を有する。まず本発明においては成型品の成
型加工を行う際、予め転写シートを弾性体によつ
て受け型の内表面に沿わせ熱成型した後、金型を
密閉し成型用樹脂を充填するので、金型を密閉す
る際或るいは成型用樹脂を充填する際に転写シー
トにクラツクやしわ等が発生することがなく美麗
な図柄を有するプラスチツクス成型品を製造する
ことができる。また本発明で特に重要なことは転
写シートが金型によつて固定されていない比較的
自由な状態で且つ弾性体を用いて押圧・加熱する
ことにより成型されるので押圧・加熱する際に転
写シートにクラツクやしわ等が発生することはな
い。何故なら加熱され変形しやすくなつている転
写シートを弾性体により徐々に伸展させながら受
け型の内表面に均一に沿わせ、遂には完全に受け
型の内表面に沿わせるためである。更に弾性体を
用いるものであるから、立ち上がりが高く複雑な
立体曲面を有するプラスチツクス成型品に対して
適用することが、可能なものであり、産業利用価
値の極めて高い優れた絵付プラスチツクス成型品
の製造方法である。
以下実施例を示し説明する。ただし部は全て重
量部を表わす。
実施例 １
無延伸ナイロン66（40μm厚）上に、ニツポラン
2304（日本ポリウレタン社製）を用いて剥離層を
形成した後、該層上に下記組成よりなる印刷イン
キを用いてグラビア印刷法にて木目模様を形成
し、転写シートを得た。
The present invention relates to a method for manufacturing a plastic molded product, particularly a painted plastic molded product, in which transfer painting is applied to the surface of the plastic molded product at the same time as the molding process of the plastic molded product having a complex three-dimensional curved surface with a high rise. The purpose is to provide a method for manufacturing plastic molded products with beautiful designs without cracks or wrinkles through easy steps. In recent years, printing on plastic molded products has been used to create wood grain patterns on cabinets such as televisions, radios, and air conditioners, cosmetic containers, household electrical appliances, etc. for the purpose of enhancing the decorative effect.
It is widely used for forming multicolored patterns on toys. As one of these methods, a method is known in which a transfer painting is applied to the three-dimensional curved surface of a plastic molded product simultaneously with the molding process. For example, the transfer sheet is mounted inside a mold of an injection molding machine by appropriate means so that the pattern layer is on the inside and matches a predetermined position within the mold, and then the mold is sealed. A molding resin is filled into the mold from the injection die of the molding mold to form the desired molded product, and at the same time transfer painting is applied.Then, the molded product is removed from the mold and the base sheet is peeled off from the transfer surface at the same time. There is a simultaneous molding and painting method. This method requires fewer steps and is easier to work with than the conventional method, which involves molding a plastic molded product and then painting the surface of the plastic molded product by direct printing or transfer printing. It has many advantages, such as being able to enhance various decorative effects. However, this molding and painting method cannot be applied to plastic molded products with complex shapes, especially plastic molded products with complex three-dimensional curved surfaces with high rise, and the conventional methods described above cannot be applied to plastic molded products with complex shapes. That is, at present, after molding, we rely on direct printing such as silk screen printing, offset printing, gravure offset printing, etc., or transfer printing. This is because, in the method described above, in which transfer painting is applied to the surface of a plastic molded product at the same time as the molding process of a plastic molded product that has a complex three-dimensional curved surface with a high rise, it is impossible to apply a beautiful design to the surface of the plastic molded product. That's why. In other words, in the molding and painting method described above, when the mold is sealed, the transfer sheet does not lie along the inner surface of the mold, so the instantaneous injection pressure of the molding resin when filling the molding resin causes the transfer sheet to Particularly large tension is applied to the parts where the rise is high and the part where the transfer sheet is supported by the mold, which may cause cracks in those parts, or other parts may be affected by the above parts. This is because it is very difficult to apply a beautiful transfer painting to the surface of a plastic molded product because wrinkles may appear on the surface of the plastic molded product. Also, when sealing the mold, the transfer sheet may be locally pushed in by the convex parts on the inner surface of the mold and be made to follow the inner surface of the mold to a certain extent. Another drawback was that the transfer sheet already had cracks and wrinkles, which caused the pattern on the molded product to become cracked and wrinkled. In addition, as an improvement to the above-mentioned molding and painting method, the transfer sheet is molded in advance into a shape that matches the inner surface of the molding receiving mold, and this is placed inside the molding receiving mold, and the resin is supplied into this. In some cases, a method of painting at the same time as molding is known (Special Publication Act 1973).
-Refer to Publication No. 33456). However, even with this method, since the transfer sheet is molded in advance with a mold, it is unavoidable that local tension is applied to the transfer sheet, and cracks, wrinkles, etc. may already occur on the transfer sheet before the resin is supplied, and this may cause damage to the transfer sheet. The disadvantage of causing cracks and wrinkles in the designs on products has not yet been solved. In addition, this method requires the pre-molded transfer sheet to be placed in a separate mold receiving mold, so if the molded product has a complex shape, various drawbacks may arise during the molding process. Ta. As a result of various considerations in view of the above points, the present inventors have
It has been discovered that various defects can be overcome by heat-forming the transfer sheet completely along the inner surface of the receiver mold with an elastic material before sealing the mold, and based on this knowledge, a means for further heat-forming the transfer sheet has been developed. research about,
As a result of repeated experiments, the present invention was completed. That is, the present invention provides a transfer sheet 3 formed by forming a transfer layer 2 on a thermoformable base sheet 1.
is placed so that the base sheet 1 side and the inner surface side of the receiving mold 5 of the molding die 4 face each other,
Pressing the transfer sheet 3 from the transfer layer 2 side using one elastic body 6 selected from the group consisting of an elastic rubber-like material, a hollow elastic bag-like material, an elastic sponge state, an elastic gel-like material, etc. The transfer sheet 3 is placed along the inner surface of the receiver mold 5 by heating so that the base sheet 1 side is in contact with the inner surface of the receiver mold 5, and then the elastic body 6 is removed, and the transfer sheet 3 is left along the inner surface of the receiver mold 5. After the mold 4 is sealed, the injection mold 7 of the mold 4 is filled with molding resin 8 to form a predetermined molded product, and then the painted plastic molded product 9 is taken out from inside the mold 4. This is a method for manufacturing a painted plastic molded product, which is characterized by the following. The present invention will be explained in detail below based on the drawings. In the method according to the present invention, any transfer sheet 3 can be used as long as it has a transfer layer 2 formed by sequentially laminating a release layer 10, a pattern layer 11, etc. on a base sheet 1. (See Figure 1). The base sheet 1 used for the transfer sheet 3 is preferably a thermoformable film with excellent stretchability, such as an unstretched film with excellent stretchability such as nylon film, polypropylene film, polyethylene film, or fluorine film. . The release layer 10 is formed using a resin composition that can be released from the base sheet 1. If the base sheet 1 is subjected to release treatment in advance, the release layer 10
Although not necessarily required, this release layer 10
It is more preferable to provide it because it becomes a surface protective film layer for protecting the pattern layer 11 in the completed molded product. The pattern layer 11 is formed by printing a desired pattern entirely or partially on the release layer 10 using a printing ink whose binder is a resin compatible with the molding resin 8. As a means for forming it, ordinary printing methods such as gravure printing, offset printing, and screen printing can be used. A heat-transferable dye, such as a disperse dye or an oil-soluble dye, may be used as a coloring agent in the printing ink. In this case, the release layer 10 may be formed using a resin composition that can be dyed with a heat-transferable dye.
In addition, when forming the pattern layer 11, it is preferable to form a pattern adjusted in consideration of deformation of the pattern during molding. In addition, when the adhesiveness between the pattern layer 11 and the molding resin 8 is weak, in addition to forming the pattern layer 11, an adhesive layer 12 is formed using a resin composition that is adhesive to the molding resin 8. may be formed. The basic type of the transfer sheet 3 used in the method according to the present invention is one having the above-described layer structure. When the metal film layer 13 is formed, a pattern with metallic luster can appear on the surface of the plastic molded product (see FIG. 2). In addition, when a matte wood grain pattern or a multicolor pattern is required on the surface of a plastic molded product, the matting agent layer 14 and /Or an embossed layer 15 may be formed (see FIG. 3). Furthermore, an insect repellent and sterilizing layer may be formed in the transfer layer.
As a method for forming the transfer layer, it is preferable to include ortho phenyl phenol in an amount of 3% by weight of the solid ink in one of the transfer layers. Alternatively, an additional insect-proofing and sterilizing layer may be provided. In this way, a molded plastic product having an insect repellent and sterilizing effect can be easily obtained. The transfer sheet 3 used in the method of the present invention has a high rise and needs to completely follow the inner surface of the mold 4 for molding a complex three-dimensional curved surface without causing any cracks or wrinkles. Transfer sheet that the applicant has already applied for
10901, Utility Model Application No. 55-97527) In other words, when using a transfer sheet characterized by using an elastomer as the resin component of the transfer layer, the deformation of the transfer sheet when pressed by the elastic body progresses extremely uniformly. Moreover, it is particularly preferable because it deforms uniformly. During the molding process, first, the transfer sheet 3 having the above structure is placed so that the base sheet 1 side and the inner surface side of the receiving mold 5 face each other (see FIG. 4). Next, the transfer sheet 3 is pressed from the transfer layer 2 side using the elastic body 6, and at the same time the transfer sheet 3 is heated, so that the transfer sheet 3 is completely aligned with the inner surface of the receiving mold 5 (see FIG. 5). The elastic body 6 may be an elastic rubber-like material such as silicone rubber or fluorine rubber, a hollow elastic bag-like material, an elastic sponge-like material, an elastic gel-like material, etc., and the transfer sheet may be made completely along the inner surface of the receiving mold. Use what you can. The reason for heating the transfer sheet 3 is to thermally mold the transfer sheet 3 so that it conforms to the inner surface of the receiving mold 5. The heating temperature at this time needs to be set at a temperature that allows the base sheet 1 to be thermoformed and at the same time does not allow the transfer layer 2 to transfer to the elastic body 6. As for the heating method, either the receiving mold 5 is preheated, the elastic body 6 is preheated, or both are preheated. Alternatively, the transfer sheet 3 may be directly heated in advance. After that, the elastic body 6 is removed. At this time, since the transfer sheet 3 has already been thermoformed, it remains in a state along the inner surface of the receiving mold 5 (see FIG. 6). After that, the mold 4 is sealed, and the injection mold 7 is filled with molding resin 8 to form a predetermined molded product (7th
(see figure). After the molding is completed, the painted plastic molded product 9 is taken out. At that time, base sheet 1
peels off when the plastic molded product is removed or after the plastic molded product is removed. By doing so, the molding process and the transfer painting can be completed at the same time, and a plastic molded product with a beautiful design can be obtained (see FIG. 8). Since the present invention has such a configuration, it has the following effects. First, in the present invention, when molding a molded product, the transfer sheet is heat-molded in advance along the inner surface of the receiving mold using an elastic body, and then the mold is sealed and filled with molding resin. A plastic molded product having a beautiful pattern can be produced without cracks or wrinkles occurring on the transfer sheet when the mold is sealed or filled with molding resin. Also, what is particularly important in the present invention is that the transfer sheet is not fixed by a mold and is molded by pressing and heating using an elastic body, so that the transfer sheet is not fixed by a mold and is molded by pressing and heating. No cracks or wrinkles will occur on the sheet. This is because the transfer sheet, which is easily deformed by heating, is gradually stretched by an elastic body so as to be uniformly aligned with the inner surface of the receiver mold, and finally to be completely aligned with the inner surface of the receiver mold. Furthermore, since it uses an elastic body, it can be applied to plastic molded products with high rise and complex three-dimensional curved surfaces, making it an excellent painted plastic molded product with extremely high industrial value. This is a manufacturing method. Examples will be shown and explained below. However, all parts represent parts by weight. Example 1 Nitsuporan on unstretched nylon 66 (40 μm thick)
After forming a release layer using 2304 (manufactured by Nippon Polyurethane Co., Ltd.), a wood grain pattern was formed on the layer by gravure printing using a printing ink having the composition shown below to obtain a transfer sheet.
【表】
次に、射出成型機に所定の形状を有する成型品
を成型することのできる金型をセツトした後、上
記転写シートを、ベースシート側と金型の受け型
の内表面側とが向かい合うように載置した。前記
受け型はその内表面に予めマツト加工とエンボス
加工とが施されたものを使用した。
次いでシリコンゴムにカーボンブラツクを練り
込んで略受け型の内部に合致するような形状に成
型された弾性ゴム状物表面を遠赤外ヒーターで約
130℃に予熱しておき、この弾性ゴム状物を用い
て前記転写シートの転写層側から押圧し、前記転
写シートを受け型の内表面に沿うように熱成型し
た。
その後、弾性ゴム状物を取り除き、金型を密閉
した後、前記金型内に射出型より溶融樹脂―サン
レツクスASN―Ａ（三菱モンサント化成社製）―
を充填し、冷却後金型を開きプラスチツクス成型
品を取り出した。しかる後ベースシートを剥離す
ると美麗な木目模様が形成されたプラスチツクス
成型品が得られた。
実施例 ２
無延伸四沸化エチレン（20μm厚）上に、ウレ
タンエラストマーを用いて剥離層を形成した後、
該層上に下記組成よりなる印刷インキを用いてグ
ラビア印刷法にて多色模様を形成し、転写シート
を得た。[Table] Next, after setting a mold capable of molding a molded product having a predetermined shape into the injection molding machine, the transfer sheet is placed between the base sheet side and the inner surface side of the receiving mold of the mold. They were placed facing each other. The receiving mold used had its inner surface previously subjected to matting and embossing. Next, carbon black was kneaded into silicone rubber, and the surface of the elastic rubber material was molded into a shape that approximately matched the inside of the receiving mold, and the surface was heated using a far-infrared heater.
The transfer sheet was preheated to 130° C. and pressed from the transfer layer side of the transfer sheet using this elastic rubber material, and the transfer sheet was thermoformed along the inner surface of the receiving mold. Thereafter, after removing the elastic rubber material and sealing the mold, the molten resin - Sunrex ASN-A (manufactured by Mitsubishi Monsanto Chemical Co., Ltd.) - is injected into the mold.
After cooling, the mold was opened and the plastic molded product was taken out. After that, the base sheet was peeled off, and a plastic molded product with a beautiful wood grain pattern was obtained. Example 2 After forming a release layer using urethane elastomer on unstretched tetrafluoroethylene (20 μm thick),
A multicolor pattern was formed on the layer by gravure printing using a printing ink having the composition shown below to obtain a transfer sheet.
【表】
次に射出成型機にコンパクトの天板を成型する
ことのできる金型をセツトした後、実施例１と同
様にして前記転写シートを載置した。
次いでニトリルゴムにフツ素樹脂をコーテイン
グした中空の弾性袋状物の内部にジエチレングリ
コールを熱媒体として注入し、弾性袋状物を約
130℃に予熱し、この弾性袋状物を用いて前記転
写シートの転写側から押圧し、前記転写シートを
受け型の内表面に沿うように熱成型した。
その後弾性袋状物を取り除き、金型を密閉した
後、前記金型内に射出型より溶融したポリエステ
ル樹脂を充填し、冷却後金型を開き絵付されたプ
ラスチツクス成型品を、ベースシートを剥離しな
がら取り出した。このようにすることによつて美
麗な多色模様が形成されたコンパクトの天板が得
られた。
実施例 ３
無延伸ポリエチレンテレフタレートフイルム
（25μm厚）上に、ビニル系エラストマーを用いて
剥離層を形成した後、該層上に下記組成よりなる
印刷用インキを用いてグラビア印刷法にて多色模
様を形成した。[Table] Next, a mold capable of molding a compact top plate was set in an injection molding machine, and then the transfer sheet was placed in the same manner as in Example 1. Next, diethylene glycol was injected as a heat medium into the inside of a hollow elastic bag made of nitrile rubber coated with fluororesin, and the elastic bag was heated to approximately
It was preheated to 130° C., and the elastic bag was used to press the transfer sheet from the transfer side, so that the transfer sheet was thermoformed along the inner surface of the receiving mold. After removing the elastic bag and sealing the mold, the mold is filled with molten polyester resin from the injection mold, and after cooling, the mold is opened and the painted plastic molded product is removed from the base sheet. I took it out while doing so. By doing this, a compact top plate with a beautiful multicolored pattern was obtained. Example 3 After forming a release layer using a vinyl elastomer on an unstretched polyethylene terephthalate film (25 μm thick), a multicolor pattern was printed on the layer by gravure printing using a printing ink having the composition below. was formed.
【表】
前記模様層上に蒸着アンカー層を形成した後、
真空蒸着法により約800Å厚のアルミニウム薄膜
層を形成した。該層上にビニル系エラストマーを
用いて接着剤層を形成し、転写シートを得た。
次に射出成型機にトランジスタラジオのキヤビ
ネツトを成型することのできる金型をセツトした
後、実施例１と同様にして前記転写シートを載置
した。
次いで受け型の内表面を予め約120℃に予熱し
ておき、ニトリルゴムにフツ素樹脂をコーテイン
グした中空の弾性袋状物を用いて、前記転写シー
トの転写層側から押圧し、前記転写シートの受け
型の内表面に沿うように熱成型した。
その後、弾性袋状物を取り除き、金型を密閉し
た後、前記金型内に射出型より溶融樹脂―ノリル
（エンジニアリングプラスチツクス社製）―を充
填し、冷却後、金型を開きプラスチツクス成型品
を取り出した。
しかる後ベースシートを剥離すると美麗な金属
光沢を有する多色模様が形成されたトランジスタ
ラジオのキヤビネツトが得られた。[Table] After forming the vapor-deposited anchor layer on the pattern layer,
An aluminum thin film layer with a thickness of approximately 800 Å was formed by vacuum evaporation. An adhesive layer was formed on the layer using a vinyl elastomer to obtain a transfer sheet. Next, a mold capable of molding a transistor radio cabinet was set in an injection molding machine, and then the transfer sheet was placed in the same manner as in Example 1. Next, the inner surface of the receiving mold is preheated to about 120°C, and a hollow elastic bag made of nitrile rubber coated with fluororesin is used to press the transfer sheet from the transfer layer side, and the transfer sheet is It was thermoformed along the inner surface of the receiving mold. Then, after removing the elastic bag and sealing the mold, the mold is filled with molten resin - Noryl (manufactured by Engineering Plastics) from an injection mold.After cooling, the mold is opened and the plastic is molded. I took out the item. Thereafter, when the base sheet was peeled off, a transistor radio cabinet was obtained in which a multicolored pattern with a beautiful metallic luster was formed.
第１図は本発明に係る方法において使用する転
写シートの一実施例についての拡大断面図、第２
図及び第３図は他の実施例についての拡大断面図
を各々示す。第４図乃至第８図は本発明に係る方
法における工程の一実施例を示す断面模式図を示
す。
図中、１…ベースシート、２…転写層、３…転
写シート、４…金型、５…受け型、６…弾性体、
７…射出型、８…成型用樹脂、９…絵付プラスチ
ツクス成型品、１０…剥離層、１１…模様層、１
２…接着剤層、１３…金属膜層、１４…マツト剤
層、１５…エンボス層。
FIG. 1 is an enlarged sectional view of one embodiment of a transfer sheet used in the method according to the present invention, and FIG.
Figures 3 and 3 each show enlarged cross-sectional views of other embodiments. FIGS. 4 to 8 are schematic cross-sectional views showing one embodiment of the steps in the method according to the present invention. In the figure, 1... base sheet, 2... transfer layer, 3... transfer sheet, 4... mold, 5... receiver mold, 6... elastic body,
7... Injection mold, 8... Molding resin, 9... Painted plastic molded product, 10... Peeling layer, 11... Pattern layer, 1
2... Adhesive layer, 13... Metal film layer, 14... Mat agent layer, 15... Embossing layer.
Claims (1)
形成してなる転写シート３を、前記ベースシート
１側と成型用金型４の受け型５の内表面側とを向
かい合わせて載置した後、弾性体６を用いて前記
転写シート３の転写層２側から押圧して加熱によ
り前記受け型５の内表面に前記ベースシート１側
が接するように転写シート３を沿わせ、その後前
記弾性体６を除去し、前記転写シート３を受け型
５の内表面に沿わせたまま前記金型４を密閉した
後前記金型４の射出型７より成型用樹脂８を充填
して所定の成型品を成型し、しかる後金型４内よ
り絵付されたプラスチツクス成型品９を取り出す
ことを特徴とする絵付プラスチツクス成型品の製
造方法。 ２ 弾性体６が、弾性のゴム状物、中空の弾性袋
状物、弾性スポンジ状物、弾性ゲル状物よりなる
群から選ばれたひとつの弾性体であることを特徴
とする特許請求の範囲第１項記載の絵付プラスチ
ツクス成型品の製造方法。 ３ 転写層２が剥離層１０、模様層１１を順次積
層したものであることを特徴とする特許請求の範
囲第１項記載の絵付プラスチツクス成型品の製造
方法。 ４ 転写層２が剥離層１０、模様層１１、接着剤
層１２を順次積層したものであることを特徴とす
る特許請求の範囲第１項記載の絵付プラスチツク
ス成型品の製造方法。 ５ 転写層２が剥離層１０、模様層１１、金属膜
層１３接着剤層１２を順次積層したものであるこ
とを特徴とする特許請求の範囲第１項記載の絵付
プラスチツクス成型品の製造方法。 ６ 転写層２が剥離層１０、金属膜層１３、接着
剤層１２を順次積層したものであることを特徴と
する特許請求の範囲第１項記載の絵付プラスチツ
クス成型品の製造方法。 ７ 模様層１１が熱移行性染料からなる着色剤を
含有してなるものであることを特徴とする特許請
求の範囲第３項乃至第５項記載の絵付プラスチツ
クス成型品の製造方法。 ８ ベースシート１が、転写層２を形成する面に
マツト剤層１４及び／又はエンボス層１５を有す
ることを特徴とする特許請求の範囲第１項記載の
絵付プラスチツクス成型品の製造方法。 ９ 転写層２の中に防虫殺菌層を含むことを特徴
とする特許請求の範囲第１項記載の絵付プラスチ
ツクスの製造方法。[Claims] 1. A transfer sheet 3 formed by forming a transfer layer 2 on a thermoformable base sheet 1 is placed between the base sheet 1 side and the inner surface side of the receiving mold 5 of the molding die 4. After placing them facing each other, the transfer sheet 3 is pressed from the transfer layer 2 side of the transfer sheet 3 using an elastic body 6 and heated so that the base sheet 1 side contacts the inner surface of the receiving mold 5 along the transfer sheet 3. After that, the elastic body 6 is removed, and the mold 4 is sealed while the transfer sheet 3 is kept along the inner surface of the receiving mold 5. Then, molding resin 8 is filled from the injection mold 7 of the mold 4. A method for producing a painted plastic molded product, which comprises molding a predetermined molded product, and then taking out the painted plastic molded product 9 from the mold 4. 2. Claims characterized in that the elastic body 6 is one elastic body selected from the group consisting of an elastic rubber-like material, a hollow elastic bag-like material, an elastic sponge-like material, and an elastic gel-like material. A method for producing a painted plastic molded product according to item 1. 3. The method for manufacturing a painted plastic molded product according to claim 1, wherein the transfer layer 2 is a layer formed by sequentially laminating a release layer 10 and a pattern layer 11. 4. The method for producing a painted plastic molded product according to claim 1, wherein the transfer layer 2 is a layer formed by sequentially laminating a release layer 10, a pattern layer 11, and an adhesive layer 12. 5. The method for producing a painted plastic molded product according to claim 1, wherein the transfer layer 2 is a layer formed by sequentially laminating a release layer 10, a pattern layer 11, a metal film layer 13, and an adhesive layer 12. . 6. The method for producing a painted plastic molded product according to claim 1, wherein the transfer layer 2 is a layer formed by sequentially laminating a release layer 10, a metal film layer 13, and an adhesive layer 12. 7. The method for manufacturing a painted plastic molded product according to claims 3 to 5, wherein the pattern layer 11 contains a coloring agent made of a heat-transferable dye. 8. The method for manufacturing a painted plastic molded product according to claim 1, wherein the base sheet 1 has a matting agent layer 14 and/or an embossed layer 15 on the surface on which the transfer layer 2 is formed. 9. The method for producing painted plastics according to claim 1, characterized in that the transfer layer 2 includes an insect repellent and sterilizing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11617480A JPS5739940A (en) | 1980-08-22 | 1980-08-22 | Production of patterned plastic molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11617480A JPS5739940A (en) | 1980-08-22 | 1980-08-22 | Production of patterned plastic molded article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5739940A JPS5739940A (en) | 1982-03-05 |
| JPS631172B2 true JPS631172B2 (en) | 1988-01-11 |
Family
ID=14680621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11617480A Granted JPS5739940A (en) | 1980-08-22 | 1980-08-22 | Production of patterned plastic molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5739940A (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2140581B (en) * | 1983-05-23 | 1987-03-18 | American Optical Corp | Anti-static and/or anti-reflective abrasion-resistant ophthalmic lenses |
| JPS62276580A (en) * | 1986-05-23 | 1987-12-01 | Nissha Printing Co Ltd | Manufacture of molded product provided with hologram |
| AU600010B2 (en) * | 1986-08-04 | 1990-08-02 | George Ralph Hann | Transfer printing method |
| US6835267B1 (en) | 1987-03-27 | 2004-12-28 | Avery Dennison Corporation | Dry paint transfer process and product |
| EP0352298B2 (en) * | 1987-03-27 | 2001-03-21 | Avery Dennison Corporation | Dry paint transfer process and product |
| US5707697A (en) | 1987-03-27 | 1998-01-13 | Avery Dennison Corporation | Dry paint transfer product having high DOI automotive paint coat |
| YU46540B (en) | 1987-03-27 | 1993-11-16 | Avery International Corp. | LAMINATE WHICH CAN BE HEAT-FORMED FOR THE FORMATION OF A THREE-DIMENSIONALLY FORMED OUTER LAYER ON THE OUTER SURFACE OF A CAR PANEL |
| JPS6489603A (en) * | 1987-09-29 | 1989-04-04 | Nissha Printing | Manufacture of parabolic antenna reflector |
| JPS6489604A (en) * | 1987-09-29 | 1989-04-04 | Nissha Printing | Manufacture of parabolic antenna reflector |
| JPH01141014A (en) * | 1987-11-27 | 1989-06-02 | Nissha Printing Co Ltd | Preparation of in-mold molded item having hairline surface |
| JPH0248935A (en) * | 1988-05-24 | 1990-02-19 | Royal Kogyo Kk | Transfer film and manufacture thereof |
| WO1990013063A1 (en) * | 1989-04-16 | 1990-11-01 | Manfred Grueninger | Process for transferring images motifs |
| JPH0334827A (en) * | 1989-06-30 | 1991-02-14 | Royal Kogyo Kk | Manufacture of plastic molding for reflector antenna |
| JPH09123694A (en) * | 1995-10-31 | 1997-05-13 | Nissha Printing Co Ltd | Manufacture of stereoscopic pattern-transferred article and transfer material to be used for its manufacture |
| US6752946B2 (en) | 1996-09-27 | 2004-06-22 | Nissha Printing Co., Ltd. | Cellular phone top cover and method of manufacturing the cellular phone top cover |
| KR100693318B1 (en) * | 1996-09-27 | 2007-03-13 | 니폰샤신인사츠가부시키가이샤 | Upper closure of a portable telephone and method of producing the upper closure of the portable telephone |
| JP3083261B2 (en) | 1996-10-31 | 2000-09-04 | 大日本印刷株式会社 | Injection molding simultaneous painting apparatus and method |
| JP5914803B2 (en) * | 2013-03-07 | 2016-05-11 | パナソニックＩｐマネジメント株式会社 | In-mold molding method and in-mold molding apparatus |
| EP3034265A1 (en) * | 2014-12-19 | 2016-06-22 | Faurecia Bloc Avant | Process for injection moulding a fiberous reinforced plastic material part with a preshaping step |
-
1980
- 1980-08-22 JP JP11617480A patent/JPS5739940A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5739940A (en) | 1982-03-05 |
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