webLoaded = "false" Loadclientside=No

Categorizing Surface Energy

So you know the surface energy of a material in dynes per centimeter… now what? The surface energy of materials can be classified into three groups: high, medium and low surface energy.

webLoaded = "false"

High Surface Energy

  • Many metals and glass have high surface energies of 100s or 1000s of dynes/cm.

    Molecules on the surface are so strongly attracted to each other that they will very happily be attracted to liquid molecules as well. As a result, these materials are relatively easy to wet out and, in turn, to bond. High surface energy materials have surface energies on the order of 100s or 1000s of dynes/cm and include many metals and glass.


webLoaded = "false"

Medium Surface Energy

  • Many engineered plastics and natural materials have surface energies up to about 300 dynes/cm.

    Everything is relative. Somewhere between perfectly wet-out films and perfectly spherical droplets, we define medium surface energy. These are materials typically 36 dynes/cm up to about 300 dynes/cm. Many engineered plastics have surface energies in this range, as do natural materials such as wood, stone or concrete.


webLoaded = "false"

Low Surface Energy

  • Materials with a low surface energy (below 36 dynes/cm) are very difficult to bond.

    Molecules on the surface of low-surface-energy materials are quite happy the way they are. There is very little attraction to any molecule, especially adhesive molecules. Materials with a surface energy below 36 dynes/cm are considered low surface energy and are very difficult to bond. These include polyolefin plastics such as polypropylene and polyethylene as well as “non-stick” surfaces such as polytetrafluorethylene (PTFE).


webLoaded = "false"

Surface Energy of Different Materials

  • Surface energy is expressed in units of energy per area or “dynes”. 1 dyne/cm is equal to 1 mJ/m.

    Recall the material bonding categories and the range of surface energies for each (pictured right). For each of these categories we will explore surface energies for common materials types.

webLoaded = "false" Loadclientside=No

Plastics

webLoaded = "false" Loadclientside=No
Compare the surface energies of different types of plastic.
webLoaded = "false"
  • Low Surface Energy Plastics

    LSE Plastics are generally soft, low-density and have a low melting point. These low surface energy materials stick together and repel liquids, making them difficult to bond. 3M has designed adhesives and tapes that work, but there are far fewer options to choose from.

  • Engineered Plastics

    Engineered Plastics are very common in manufacturing: they’re low-cost, strong and sturdy, yet they’re also lightweight and easy to mold into complicated shapes to suit specific needs. Engineered Plastics have higher surface energies than LSE Plastics, so they’re easier for tapes and adhesives to wet out and bond.

webLoaded = "false" Loadclientside=No

Traditional Materials

This is a broad and varied group: basically it includes lots of things that have higher surface energies than plastics but lower surface energies than metals. This category includes old technologies like glass, ceramics and concrete as well as natural materials like wood, leather and fabric. Traditional Materials are relatively easy to bond, but each one has its own considerations.

Learn more

webLoaded = "false" Loadclientside=No
This chart shows the surface energy levels of traditional manufacturing materials.
webLoaded = "false" Loadclientside=No

Metal

Metals are strong and perform well across a wide range of temperatures and environments. They have very high surface energies and they’re open to contact with liquids and thus very easy to wet out. Most adhesives and tapes will adhere to most metals, so any time you’re bonding metal you have a wide range of adhesive options.

Learn more

webLoaded = "false" Loadclientside=No
This chart shows the surface energy levels of different types of metal.

webLoaded = "false"

Related education articles


Connect With Us
We're here to help.

Need help finding the right product for your project? Contact us if you need product, technical or application advice or want to collaborate with a 3M technical specialist, or give us a call at 1-800-831-0658.

Need help finding the right product for your project? Contact us if you need product, technical or application advice or want to collaborate with a 3M technical specialist, or give us a call at 1-800-831-0658.

Close  

Industrial Adhesives & Tapes | Ask A 3M Expert



Thank you for your interest! Please complete the form below to receive your tape or adhesives sample or enter your question or comment below.


Industrial Users Only


Disclaimer: The 3M Industrial Sample Request Program is not available to consumers or the general public. We reserve the right to disqualify without notification any sample request that does not appear to be for industrial manufacturing purposes. Samples are available to U.S. industrial customers only. Only one sample per qualified customer. You will be contacted to verify your request. If you are a 3M Distributor, contact your 3M Sales Representative. Quantities available while supplies last.


We will respond to your email request in 24 - 48 business hours.


All fields are required unless indicated optional


  •  
  • 3M takes your privacy seriously. 3M and its authorized third parties will use the information you provided in accordance with our Privacy Policy to send you communications which may include promotions, product information and service offers. Please be aware that this information may be stored on a server located in the U.S. If you do not consent to this use of your personal information, please do not use this system.

  • Submit

Thank You

Thank you for your interest in 3M Industrial Adhesives & Tapes products. A 3M representative will contact you shortly regarding your inquiry.

Our Apologies...

An error has occurred while submitting. Please try again later...

CHAT WITH US
Follow Us
Change Location
United States - English