JP3802638B2 - Double layer molding - Google Patents
Double layer molding Download PDFInfo
- Publication number
- JP3802638B2 JP3802638B2 JP2436897A JP2436897A JP3802638B2 JP 3802638 B2 JP3802638 B2 JP 3802638B2 JP 2436897 A JP2436897 A JP 2436897A JP 2436897 A JP2436897 A JP 2436897A JP 3802638 B2 JP3802638 B2 JP 3802638B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- elastomer
- parts
- styrene
- injection
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2209/00—Layers
- H01H2209/002—Materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2209/00—Layers
- H01H2209/014—Layers composed of different layers; Lubricant in between
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Switches (AREA)
- Push-Button Switches (AREA)
- Laminated Bodies (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は例えば制御パネル、押しボタン等の高強度耐摩耗性が要求される部材、部品に適する二層成形物に関するものである。
【０００２】
【従来の技術】
例えば電気洗濯機、電子計算機等家庭用品や事務用品等にはインストルーメントパネル、制御パネル、押しボタン等が装備されている。これら部材あるいは部品は使用頻度が高く高強度耐摩耗性が要求される。このような部材、部品には従来から高強度なエンジニアリングプラスチックの射出成形物が使用されていた。しかしエンジニアリングプラスチックは耐摩耗性が乏しいので、その表面に射出成形によってエラストマーを被覆した構成が提供されている（特開平６−６５４６７号、特開平６−１０７８９８号、特公平７−９４１３７号）。
上記構成においては、エラストマーとしてスチレン・イソプレン・スチレンブロック共重合体（ＳＩＳ）とポリエステル、ポリアミドまたは熱可塑性ポリウレタンとの混合物を使用して、エンジニアリングプラスチックとの熱融着性が改良されている。
【０００３】
【発明が解決しようとする課題】
上記従来技術においても、エンジニアリングプラスチックとエラストマーとの充分な熱融着性が得られなかった。
【０００４】
【課題を解決するための手段】
本発明は上記従来の課題を解決するための手段として、ポリフェニレンオキサイド層と、該ポリフェニレンオキサイド層を被覆するエラストマー層とからなり、該エラストマーはスチレン・エチレン・プロピレン・スチレンブロック共重合体１００重量部と、ポリカーボネートおよび／またはアクリロニトリル−ブタジエン−スチレン共重合体５〜５０重量部との混合物である二層成形物を提供するものである。
【０００５】
本発明において使用されるエンジニアリングプラスチックとしては、ポリフェニレンオキサイドおよび変性ポリフェニレンオキサイドがある。
【０００６】
本発明において使用されるエラストマーとしては、スチレン・エチレン・プロピレン・スチレンブロック共重合体（ＳＥＰＳ）が選択される。そして該ＳＥＰＳの熱融着性を更に改良するために添加される熱可塑性樹脂はポリカーボネート（ＰＣ）およびアクリロニトリル−ブタジエン−スチレン共重合体（ＡＢＳ）である。該熱可塑性樹脂の添加量はＳＥＰＳ１００重量部に対して５〜５０重量部である。
【０００７】
本発明の二層成形物を製造する方法としては、主として射出成形法が適用される。該射出成形法としては、射出成形したエンジニアリングプラスチック成形物を射出成形金型内にインサートし、エラストマー層を射出成形するインサート射出成形法、射出成形金型内でエンジニアリングプラスチック成形物を射出成形し、次いでエラストマー層を射出成形する二色射出成形法がある。
【０００８】
【発明の実施の形態】
表１および表２に示すポリフェニレンオキサイド（ＰＰＯ）を射出成形して１１０×２０×２mmのプレート状成形物を製造し、該射出成形物を金型内にインサートして表１および表２に示す組成のエラストマー層（厚み１mm）を射出成形して二層成形物試料を作成する。
該二層成形物の剥離試験の結果を表１および表２に示す。
融着状態（融着性）の評価は下記の通りである。
◎：材料破壊、 ×：融着せず、
【０００９】
【表１】
【表２】
表１および表２によれば、ＳＥＰＳ１００重量部に対してＰＣまたはＡＢＳを１０〜４０重量部配合した範囲でＰＰＯに対して良好な熱融着性そして層間剥離強度が得られる。
【００１２】
【発明の効果】
本発明では高強度なＰＰＯ成形物に耐摩耗性を付与するためにエラストマー層被覆するが、該エラストマー層としてＳＥＰＳにＰＣおよび／またはＡＢＳを混合するから、成形物とエラストマー層との優れた熱融着性が得られる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a two-layer molded article suitable for a member or part that requires high strength and wear resistance, such as a control panel and a push button.
[0002]
[Prior art]
For example, household items such as electric washing machines and electronic computers, office supplies, etc. are equipped with an instrument panel, a control panel, a push button, and the like. These members or parts are frequently used and require high strength and wear resistance. Conventionally, high strength engineering plastic injection molded products have been used for such members and parts. However, since engineering plastics have poor wear resistance, configurations are provided in which the surface is coated with an elastomer by injection molding (Japanese Patent Laid-Open Nos. 6-65467, 6-107898, and 7-94137).
In the above configuration, the heat-fusibility with the engineering plastic is improved by using a mixture of styrene / isoprene / styrene block copolymer (SIS) and polyester, polyamide or thermoplastic polyurethane as an elastomer.
[0003]
[Problems to be solved by the invention]
Even in the above prior art, sufficient heat fusion between the engineering plastic and the elastomer could not be obtained.
[0004]
[Means for Solving the Problems]
The present invention comprises a polyphenylene oxide layer and an elastomer layer covering the polyphenylene oxide layer as means for solving the above conventional problems, and the elastomer comprises 100 parts by weight of a styrene / ethylene / propylene / styrene block copolymer. And a two-layer molded product which is a mixture of polycarbonate and / or acrylonitrile-butadiene-styrene copolymer in an amount of 5 to 50 parts by weight.
[0005]
The engineering plastic used in the present invention, there is port polyphenylene oxide and modified polyphenylene oxide.
[0006]
A styrene / ethylene / propylene / styrene block copolymer (SEPS) is selected as the elastomer used in the present invention. The thermoplastic resins added to further improve the heat-fusibility of the SEPS are polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS). The addition amount of the thermoplastic resin is 5 to 50 parts by weight with respect to 100 parts by weight of SEPS.
[0007]
As a method for producing the two-layer molded product of the present invention, an injection molding method is mainly applied. As the injection molding method, an engineering plastic molding that has been injection-molded is inserted into an injection mold, an insert injection molding method in which an elastomer layer is injection-molded, an engineering plastic molding is injection-molded in an injection molding mold, Next, there is a two-color injection molding method in which an elastomer layer is injection molded.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The polyphenylene oxide (PPO) shown in Table 1 and Table 2 is injection-molded to produce a 110 × 20 × 2 mm plate-like molded product, and the injection-molded product is inserted into a mold and shown in Table 1 and Table 2. A two-layer molded product sample is prepared by injection molding an elastomer layer (thickness 1 mm) of the composition.
Tables 1 and 2 show the results of the peel test of the two-layer molded product.
The evaluation of the fusion state (fusion property) is as follows.
A: Material destruction , X : No fusion,
[0009]
[Table 1]
[Table 2]
According to Tables 1 and 2, good heat-fusibility and delamination strength with respect to PPO can be obtained in a range where 10 to 40 parts by weight of PC or ABS is blended with 100 parts by weight of SEPS.
[0012]
【The invention's effect】
In the present invention, an elastomer layer is coated in order to impart wear resistance to a high-strength PPO molded product. Since the SEPS is mixed with PC and / or ABS as the elastomer layer, excellent heat treatment between the molded product and the elastomer layer is achieved. Fusing property is obtained.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2436897A JP3802638B2 (en) | 1997-01-22 | 1997-01-22 | Double layer molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2436897A JP3802638B2 (en) | 1997-01-22 | 1997-01-22 | Double layer molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10202792A JPH10202792A (en) | 1998-08-04 |
| JP3802638B2 true JP3802638B2 (en) | 2006-07-26 |
Family
ID=12136257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2436897A Expired - Fee Related JP3802638B2 (en) | 1997-01-22 | 1997-01-22 | Double layer molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3802638B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19845235C2 (en) * | 1998-10-02 | 2002-05-16 | Ticona Gmbh | Composite body made of polyacetal and styrene-olefin elastomers and process for its production |
| JP4204928B2 (en) * | 2003-08-13 | 2009-01-07 | 株式会社クラレ | Thermoplastic polymer composition |
-
1997
- 1997-01-22 JP JP2436897A patent/JP3802638B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10202792A (en) | 1998-08-04 |
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