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How to Avoid Adhesive Bond Failures

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Shiraz Kahn
How to Avoid Adhesive Bond Failures

Adhesives are known for giving a strong bond. That's why most industries developing bonding products use them. Though the bond they create can be strong and durable, sometimes bond failures may happen. One of these failures may be using the wrong proportion of chemicals such as 2-Ethylhexyl Acrylate.

There are two main categories of bond failures that are likely to occur: adhesive and cohesive failure. With the right tips, you can avoid these failures in future applications.

Read on to know how to avoid bond failures.

  1. Select The Correct Adhesive

Selecting the right adhesive for a substrate is one of the most important things in ensuring a strong and durable bond. Adhesives adhere differently to substrates. Not all of them may be compatible with your substrate. So, if you select the wrong one, it'll improperly cure.

Furthermore, you should also consider the environmental conditions that you'll expose your bond to. Wrong adhesives may easily fail when subjected to different temperatures, vibration, impact, or chemical exposure. Thoroughly researching will help you find the correct adhesive to use in every application.

  1. Prepare Adequately

Before bonding substrates, you should prepare them adequately. That's because substrates having substances like grease, oil, and dirt may not bond well. Therefore, ensure you prepare their surfaces to increase bonding chances and durability. You can use various products like flux removers, greasers and cleaners, and primers to prepare substrate surfaces.

  1. Read The Application Requirements

Adhesives will require you to perform various actions for successful curing. These actions can only be successful if you strictly follow the application's requirements like curing temperature, time, and pressure. These requirements are written on the labels to guide you. Ensure you check them before applying any adhesive to a substrate. Also, ensure that you have the right equipment.

You should apply adhesives consistently across the bond line to strengthen the bond. If you apply too little adhesive, the surface may easily crack or separate. On the other hand, too much adhesive may take longer to cure and may result in a weak bond or an untidy finish.

  1. Use The Right Ratios

When you use two-component adhesives on a substrate, the resulting bond will be very strong and reliable. Unfortunately, making these adhesives requires you to have mixing and preparation skills. If you mix them in the wrong ratio, their chemical properties will be affected, leading to a failed or weak bond.

If you take long to mix them, the adhesives may become too watery and unable to stick on the substrate. So, if you intend to use a two-component adhesive, it's vital to mix them in the right ratios. You also want to keep time so that you don't take long.

  1. Avoid Stressing

When selecting an adhesive for a substrate, ensure you consider the stress that the finished bond will face. Adhesives have various flexibility levels, and some may withstand stress better than others. If you select one that won't hold the joint stress, you may experience a bond failure. Select flexible adhesives to promote movement within the joints.

Bottom Line

Like all other chemical compounds, adhesives operate well in certain conditions. These tips can help you to prevent bond failures.

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Shiraz Kahn
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