CN101781750B - 塑料表面不导电金属化方法及由该方法制成的塑件 - Google Patents
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Abstract
本发明提供一种塑料表面不导电金属化方法，其包括如下步骤：提供一塑料基体；于该塑料基体表面蒸镀一黑色的不导电合金镀层，形成该合金镀层的蒸镀靶材为钢材和另一种材料，该另一种材料选自铟、锡、铝及二氧化硅中的任意一种。该塑料表面不导电金属化方法既可使塑料基体表面呈现神秘的黑色系金属外观，又具有电磁波传透功能。本发明还提供一种由上述方法制成的塑件。
Description
技术领域
本发明是关于一种塑料表面不导电金属化方法及由该方法制成的塑件。
背景技术
电镀和真空镀膜方法常用来使塑料材质的塑件(如手机外壳)上具有金属的外观效果。真空镀膜为一种相对电镀来说更为环保的表面涂装方法，其已广泛应用于各种产品外观装饰用途。真空镀膜技术可使产品外表产生高质感的金属外观效果，故可提升产品的外观竞争力和附加价值。然而就通讯产品而言，一般的金属真空镀膜层(如单一的不锈钢真空镀膜层)因具有导电性而屏蔽电磁波，故而会影响产品的通讯性能，而目前少有的几种能用于不导电真空镀膜的靶材如钛、锡等虽然能满足不导电的要求，但这些靶材单独使用时所得镀膜层颜色较为单一，一般仅能呈银色或灰色，所以目前金属真空镀膜塑件还较少应用在通讯产品外壳上。
发明内容
有鉴于此，有必要提供一种可于塑料产品表面获得黑色系不导电金属膜的金属化方法。
另有必要提供一种由上述方法制成的塑件。
一种塑料表面不导电金属化方法，其包括如下步骤：
提供一塑料基体；
于该塑料基体表面蒸镀一黑色的不导电合金镀层，形成该合金镀层的蒸镀靶材为钢材和另一种材料，该另一种材料选自铟、锡、铝及二氧化硅中的任意一种，该靶材中钢材的重量比大于该另一种材料的重量比，该合金镀层的厚度范围为10nm～500nm。
一种塑件，其包括一塑料基体，其特征在于：该塑件还包括一形成于该塑料基体表面的一黑色的不导电合金镀层，该合金镀层由钢材和另一种材料组成，该另一种材料选自铟、锡、铝及二氧化硅中的任意一种，该合金镀层中钢材的重量比大于该另一种材料的重量比，该合金镀层的厚度范围为10nm～500nm。
上述塑料表面不导电金属化方法通过对蒸镀靶材的选择及镀层厚度的控制，在塑料基体表面形成一不导电的黑色系合金镀层，使使由该塑料表面不导电金属化方法制成的塑件既具有神秘的黑色系金属外观，又不影响电磁波的传输与接收。
附图说明
图1是由本发明较佳实施例塑料表面不导电金属化方法制成的塑件的示意图。
具体实施方式
本发明较佳实施例塑料表面不导电金属化方法包括如下步骤：
首先，提供一塑料基体，并可对塑料基体进行相关前处理，比如用含乙醇或异丙醇等有机溶剂的清洗液清洗基体表面，以去除基体表面油污。
然后，将该塑料基体放入真空蒸镀设备中蒸镀，以于塑料基体表面形成一黑色的合金镀层。为了能使该合金镀层呈黑色系且不导电，蒸镀靶材选用钢材和另一种材料。该另一种材料可选自铟、锡、铝及二氧化硅四种材料中的任意一种，优选金属铟。本实施例的钢材优选为不锈钢。为了使蒸镀上该合金镀层的塑料基体在用作通讯装置(如手机)的外壳时，对无线射频的传输或接收不产生干扰(即具有良好的电磁波穿透性能)，还需要控制该合金镀层的厚度。为了达到上述效果，该合金镀层的厚度范围大约为0.005nm～1000nm，优选厚度范围大约为10nm～500nm，而且，所用靶材中钢材的重量比应大于另一种材料(即铟、锡、铝及二氧化硅中的任意一种)的重量比，较优的是，其中钢材的重量比范围大约为50％～95％，另一种材料的重量比范围大约为5％～50％。
最后，于该合金镀层表面喷涂一透明的保护漆膜。该保护漆膜可包括一中漆层及形成于该中漆层表面的面漆层。为了调整合金镀层的黑色效果，可于该中漆层中添加黑色颜料。该中漆层可以为紫外光固化漆，也可以为聚氨酯漆及不饱和聚酯漆等一般热固化漆。该中漆层可提高后续面漆层的附着力。该面漆层具有较高的硬度以起到较好的表面保护作用。该面漆层可以为透明的紫外光固化漆。
请参阅图1，一种由上述塑料表面不导电金属化方法制成的塑件10，包括一塑料基体12、形成于该塑料基体12表面的一黑色的不导电合金镀层14及形成于该合金镀层14表面的一透明的保护漆膜16。该合金镀层14由钢材和另一种材料组成，该另一种材料选自铟、锡、铝及二氧化硅中的任意一种，优选金属铟。本实施例的钢材优选为不锈钢。该合金镀层14的厚度范围大约为0.005nm～1000nm，优选厚度范围大约为10nm～500nm。该保护漆膜16包括一中漆层162及形成于该中漆层162表面的面漆层164。
上述塑料表面不导电金属化方法通过对蒸镀靶材材料的选择及合金镀层厚度的控制，在塑料基体表面形成一具有电磁波穿透性能的黑色系合金镀层，使由该塑料表面不导电金属化方法制成的塑件既具有神秘的黑色金属外观，又不影响电磁波的传输与接收。
可以理解，也可以省略该保护漆膜的中漆层，使该保护漆膜仅由该面漆层组成。此时，可根据需要直接于该面漆层中添加黑色颜料。
可以理解，为了增加该合金镀层的附着力及表面光亮度，也可以在蒸镀该合金镀层前于塑料基体表面喷涂一紫外光固化底漆。
可以理解，该保护漆膜也可以省略。
Claims (7)
1.一种塑料表面不导电金属化方法，其包括如下步骤：
提供一塑料基体；
于该塑料基体表面蒸镀一黑色的不导电合金镀层，形成该合金镀层的蒸镀靶材为钢材和另一种材料，该另一种材料选自铟、锡、铝及二氧化硅中的任意一种，该靶材中钢材的重量比大于该另一种材料的重量比，该合金镀层的厚度范围为10nm～500nm。
2.如权利要求1所述的塑料表面不导电金属化方法，其特征在于：该钢材为不锈钢。
3.如权利要求1所述的塑料表面不导电金属化方法，其特征在于：该钢材的重量比大于50％、小于或等于95％，该另一种材料的重量比大于或等于5％、小于50％。
4.如权利要求3所述的塑料表面不导电金属化方法，其特征在于：该塑料表面不导电金属化方法还包括于该合金镀层表面喷涂一保护漆膜的步骤，该保护漆膜包括一中漆层及形成于该中漆层表面的面漆层，该中漆层中添加有黑色颜料。
5.如权利要求1所述的塑料表面不导电金属化方法，其特征在于：该塑料表面不导电金属化方法还包括在形成该合金镀层之前于该塑料基体上喷涂一底漆的步骤。
6.一种塑件，其包括一塑料基体，其特征在于：该塑件还包括一形成于该塑料基体表面的一黑色的不导电合金镀层，该合金镀层由钢材和另一种材料组成，该另一种材料选自铟、锡、铝及二氧化硅中的任意一种，该合金镀层中钢材的重量比大于该另一种材料的重量比，该合金镀层的厚度范围为10nm～500nm。
7.如权利要求6所述的塑件，其特征在于：该塑件还包括一形成于该合金镀层表面的保护漆膜，该保护漆膜包括一中漆层及形成于该中漆层表面的面漆层，该中漆层中添加有黑色颜料。
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| US12/561,369 US20100183871A1 (en) | 2009-01-16 | 2009-09-17 | Nonconductive surface metallization method and plastic article manufactured by the same |
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| CN101781751A (zh) * | 2010-03-23 | 2010-07-21 | 张斌 | 一种用于塑胶产品表面的不导电金属膜的制作方法 |
| CN103046002A (zh) * | 2012-12-14 | 2013-04-17 | 东莞华清光学科技有限公司 | 一种非导电性真空镀金属彩色透明膜 |
| JP6282374B1 (ja) * | 2017-09-11 | 2018-02-21 | 尾池工業株式会社 | 黒色蒸着フィルムおよびその製造方法 |
| CN110205585B (zh) * | 2019-06-04 | 2021-11-30 | 天通（嘉兴）新材料有限公司 | 一种镜筒一体黑镀膜及其制作工艺 |
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| CN1571594A (zh) * | 2003-04-30 | 2005-01-26 | 拜尔材料科学股份公司 | 金属化塑料模制品 |
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| US4322276A (en) * | 1979-06-20 | 1982-03-30 | Deposition Technology, Inc. | Method for producing an inhomogeneous film for selective reflection/transmission of solar radiation |
| TW344032B (en) * | 1995-01-27 | 1998-11-01 | Mitsui Toatsu Chemicals | Light reflective sheet and light reflector using it |
| TW469357B (en) * | 1996-08-05 | 2001-12-21 | Teijin Ltd | Alignment film with pores |
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| CN1571594A (zh) * | 2003-04-30 | 2005-01-26 | 拜尔材料科学股份公司 | 金属化塑料模制品 |
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| Title |
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| 应世杰.塑料金属化技术及其应用.《电子机械工程》.1985,(第4期),第57-65页. * |
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