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了解聚丙烯(PP)益处的血浆激活

Written by: George Osenga

聚丙烯(PP)是一种热塑性超级英雄,非常适合制造坚固,健壮的产品,从汽车保险杠和医疗设备到用于恶劣环境的高性能织物。实际上,聚丙烯用于制造几乎每个主要行业和市场中的产品。

但是,聚丙烯是一种具有相对较低表面能的聚合物,需要对其进行修改以更好地接受各种处理,例如粘合,绘画和涂层。最近,血浆治疗已越来越流行bob sports vip 以及针对各种聚丙烯产品(包括纺织品)的修改技术,用于增强材料的润湿性。现在,许多制造商使用等离子体系统来进行表面准备,以增强BOB体育登陆网页整个消费者,商业和工业世界中产品的粘结和粘附性能。

The 3 Types of Plasma for Activating Polypropylene

There are 3 primary plasma system options for treating polypropylene:

atmospheric-plasma-treatment

大气血浆
该方法利用electrically-energized空气或gases that are passed through a nozzle at surrounding atmosphere or normal pressure using a pulsed electric arc generated by high voltage discharge. It is generally used for spot treatment of materials or low area in-line processing because it does not require a vacuum chamber and integrates well with a manufacturing assembly process.

low_friction_coating

低压Plasma
This type of system generates plasma in a chamber that has been evacuated and then injected with small amounts of gas – usually oxygen, argon, hydrogen, nitrogen, or air. This method is better-suited for large batch parts processing and can easily handle difficult geometries.
corona-discharge

电晕等离子体
Corona treatment is an electrical process that uses ionized air to increase the surface tension. Corona plasma is generated by the application of high voltage to an electrode that has a sharp tip where the plasma forms. This method is typically used for in-line wider area manufacturing applications that require a lower shift in surface energy.

Ways Manufacturers use Plasma to Activate Polypropylene

有几种使用血浆系统根据特定产品所需的处理来激活聚丙烯的方法。BOB体育登陆网页以下是一些示例,说明了上述方法用于增强这种热塑性材料:

  • 大气等离子体对于在正常制造环境中激活宽面料表面非常有效
  • Both atmospheric and low-pressure plasma methods are used to treat bulk material or large surfaces where the entire surface must be treated
  • 聚丙烯粉可以用低压等离子体处理,以便将粉末共价混合在溶液中
  • Plasma is used to enhance polypropylene’s ability to bond with pressure-sensitive adhesives; for example, to enable the use of double-sided adhesive tape instead of glue
  • 等离子有效地增强聚丙烯的低表面能量以改善绘画,打印和涂料工艺,使它们能够共价结合并产生更可靠,更持久的饰面

How Much Does Plasma Activation Improve Wettability of Polypropylene?

Wettability is a surface characteristic that is defined as the tendency of a fluid to spread or adhere to a solid surface and the ability of that surface to hold contact with it. One way to measure wettability is to use a test that registers a unit of force called a dyne.

Most manufacturing applications in which good wettability is desired require at least 72 dynes as a benchmark for acceptable product performance – a result difficult to achieve with polypropylene’s inherent low surface energy. By activating the surface of the polypropylene with plasma, its surface energy can be increased from 28 dynes to more than 105 dynes – well beyond the acceptable performance level. This significant improvement increases the number of manufacturing applications for polypropylene and its value as a versatile raw material, reinforcing its reputation as a workhorse of the thermoplastic industry.

等离子体激活很好地集成在制造线上

Atmospheric, low-pressure, and corona plasma systems are all well-suited for production line integration. Flexible, versatile, and streamlined for manufacturing use, these methods are efficient and effective, capable of providing highly accurate, automated, and reliable service in high-volume production environments. Plasma activation of polypropylene on an automated production line can occur at rates of 100 to 400 mm/second, and batch processes can occur in process times of less than 10 minutes for a large batch of parts.

Unlike other surface treatment technologies that produce toxic by-products and pose health risks for workers, plasma technology is a cost-effective solution that does not produce any volatile organic compounds, providing a safe industrial hygiene environment that protects worker health.

Manufacturing process development using plasma to treat polypropylene is simple to implement and is a highly reliable form of surface treatment. The combination of polypropylene’s popularity and the availability of high-quality, cost-efficient plasma systems make them a perfect combination for developing and manufacturing new and innovative products.

Discover how your business can utilize plasma activation technology to modify polypropylene surfaces for high-performance bonding, coating and painting. Downloading the eBook, "制造商的表面激活指南改善粘附力" to learn more.

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