Tech Talk Blog

Wettability Defined and Correlation to Bonding

August 28, 2018

Wettability Defined and Correlation to Bonding

There is usually a good correlation between bonding and wetting. Wettability can be defined as “the ability of a solid surface to reduce the surface tension of a liquid in contact with it such that it spreads over the surface and wets it.”

So, it seems intuitive that good wetting would automatically result in strong bonds. However, this is not always the case. Two different cases where this correlation can break down are:

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Why Choose Plasma Surface Treatment of Plastics to Enhance Adhesion?

January 2, 2018

Why Choose Plasma Surface Treatment of Plastics to Enhance Adhesion?

Good adhesion of manufactured parts. Whether you want to adhere one part to another, or secure paint to a component, good adhesion can be difficult to achieve in the regular manufacturing process. Plasma surface treatment can help you enhance adhesion at a good value, and with excellent results - but the process remains a mystery to many designers. Let’s take a look behind the curtain to learn why plasma cleaning is often recommended: 

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Ask the Expert: Dry Plasma Cleaning vs. Wet Cleaning Processes: Which method is best?

September 6, 2016

Dry Plasma Cleaning vs. Wet Cleaning Processes: Which method is best?

How can I remove trace contaminants from inorganic substrates?

Which cleaning method will achieve the best bonding results?

These questions were recently posted to our Ask The Experts portal. Proper cleaning of a substrate is a critical first step in many manufacturing processes, particularly for the medical, aerospace, and electronics industries. So which method will render substrates atomic-level clean and ready for bonding? We recommend plasma cleaning for a number of reasons:

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What is Plasma Treatment? Here’s How it Works

June 28, 2016

What is Plasma Treatment? Here’s How it Works.

In honor of this recent commencement season, today we’re sharing a lesson right from our bearing resource center, TriStar University. Here’s a back-to-basics review of how plasma treatment works. Essentially, plasma treatment is a low-pressure gas process that removes all traces of organic contamination to improve the outcomes of secondary applications. 

Here’s how it works:

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Plasma Treatment of Medical Filters

January 8, 2015

Plasma Treatment of Medical FiltersIt is no secret that medical manufacturers are turning to plasma treatment to help them improve the performance of their products. Whether used to alter PEEK and PVC to accept time-released medications or even to improve a plastic-to-metal bond in medical tools; plasma treatment has virtually unlimited potential for the medical and pharmaceutical fields. 

Today I wanted to share how we treated blood filters that are used in orthopedic surgery. Our team is proud to help ensure patient safety by treating the filters that inhibit platelet clotting and assist with gas exchange during surgery.

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3 Key Benefits of Surface Modification

December 9, 2014

TriStar Plastics Corp. - 3 Key Benefits of Surface ModificationReading through some of our older posts, I noticed that we received some great feedback on our coverage of Plasma Surface Modification Improves Drone Aerodynamics. A topic that is still timely today. In this instance, our client needed to improve the bond strength on the wing edge of their drones. The end result after plasma treatment was a superior bond adhesion that excelled at resisting wind forces.

Today I wanted to review 3 key benefits of surface modification for all industries.

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Tips to Bond Silicone Rubber to Aluminum

September 23, 2014

Plasma cleaning of metal parts dramatically increases the success of overmolding.We’ve had a few questions lately about the best method of bonding rubber to aluminum before overmolding. It seems this bonding combination poses a tough challenge. And in many cases, we’re finding that companies want to achieve better bond strength without using harsh solvents. So how can you achieve one without the use of the other? Plasma cleaning is the answer.

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Benefits of Plasma Cleaning

October 4, 2011

  • Remove organic contaminants by chemical reaction (O2) or physical ablation (Argon plasma)
  • Eliminate the use of chemical solvents as well as storage and disposal of solvent waste
  • Clean surfaces with microscale porosity or microchannels not suitable for solvent cleaning due to surface tension limitations
  • Render most surfaces hydrophilic; decrease water droplet contact angle and increase surface wettability
  • Promote adhesion and enhance bonding to other surfaces
  • Prepare surface for subsequent processing (e.g. printing, painting, coating, potting)
  • Clean surface without affecting the bulk properties of the material
  • Can treat a wide variety of materials as well as complex surface geometries; examples include:
    • Semiconductor wafers and substrates (Si, Ge)
    • Glass slides and substrates
    • Optics and optical fibers
    • Oxides (quartz, indium tin oxide (ITO), TiO2, Al2O3); mica
    • Gold and metal surfaces
    • Atomic force microscopy (AFM) cantilever tips
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