5月 09 2016

汽車零部件供應商 – 當心空氣等離子體只能夠提供勉強可以接受的結果



高密度聚乙烯(HDPE)和聚丙烯(PP)被廣泛地用於汽車行業生產模制塑料部件。這些電子元件欲獲得塑料的堅固,耐用的附著力可以說是一個很大的挑戰。線上大氣等離子體表面活化解決了這個問題。但是,你必須使用正確的等離子體作業。

空氣等離子體產生的熱反應氣體激活熱敏感材料時會產稱不良的影響,如聚乙烯和聚丙烯。 Surfx的冷氬等離子體提供了一個完整的解決方案,可增加優異的附著力與無熱損傷。

顯然,使用空氣等離子體的氣體成本與那些使用瓶裝氬和氧更便宜。然而,不同的是最多幾毛錢($ 0.01美元)的售價為十幾塊錢的一部分。省下來的錢真的值得必須承受著招回的風險嗎?附著的部件必須通過使用數万小時下恆定振盪​​,溫度範圍從-10攝氏度至40攝氏度,並且在高達100%的濕度下。實驗室測試不能重複這樣的環境。

當心空氣等離子體只能夠提供勉強可以接受的結果。可告訴您的客戶,您是願意去加倍努力,提供一個更好的解決方案使用Surfx產品,在車輛的生命週期內,提供沒有失敗且可靠的產品。

羅伯特·希克斯博士
CEO兼總裁
Surfx技術有限責任公司

1月 26 2015

Atmospheric Pressure Plasma Activation of Polymers and Composites for Adhesive Bonding: A Critical Review


Atmospheric Pressure Plasma Activation of Polymers and Composites for Adhesive Bonding: A Critical Review

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The strength of bonded joints is of great concern to the aerospace, automotive, medical device, and electronics industries [1]. Atmospheric pressure plasma acti-vation is rapidly gaining acceptance as a desirable method of surface preparation prior to bonding [1]. This technique provides an alternative to traditional methods of surface preparation by wet chemical cleaning and mechanical abrasion [1, 2]. Although these latter procedures are “tried and true,” they are time consuming manual processes. Moreover, in certain instances, they yield lower bond strengths, and can even result in damage to composites that are fabricated with high modulus fibers [1, 2]. Abrasion methods generate dust which is an environment, health, and safety concern. Consequently, there is a need to explore alternative, environ-mentally friendly approaches that activate the surface without damaging the bulk material. Atmospheric pressure plasmas show promise for fulfi lling this need.

This review article focuses primarily on atmospheric pressure plasmas that are self contained, and are suitable for the treatment of three-dimensional extruded parts, such as are common in many manufactured products. Plasmas used for this purpose are decoupled electrically from the workpiece. They produce an after-glow that contains neutral reactive species, which fl ow out and down onto the surface being activated. This may be contrasted to coronas and dielectric barrier discharges that are used to treat plastic fi lm. In this latter case, the polymer fi lm is passed between the powered and grounded electrodes in roll-to-roll fashion, and the fi lm is activated by contact with both ionized and neutral species. For more detailed information on the performance of these latter devices, the reader is referred to several excellent review articles [3–6].

In this paper, we examine published work using downstream, atmospheric pressure plasma to activate polymer and composite surfaces. First an overview of the physics and chemistry of atmospheric pressure plasmas will be given, along with a comparison of the different types of devices. Then, the efficacy of this technique for surface activation will be discussed in terms of the mechanical proper-ties, the water contact angle (i.e., surface energy), the surface roughness, and the surface composition. Lastly, we will consider the mechanism of polymer surface activation.

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