ISO QMS Certified
"Our Science ... Your Success"

Successfully Bonding Acrylic with Industrial Adhesives

  • Home
  • Successfully Bonding Acrylic with Industrial Adhesives

Successfully Bonding Acrylic with Industrial Adhesives

What is Acylic? (PMMA) – polymethyl methacrylate  – Several types of industrial adhesive bond acrylic. Because its surface is receptive to adhesive bonding, bond strength normally exceeds the actual substrate strength (meaning that when the joint is pulled apart, the substrate breaks before the adhesive joint).  Most applications involve clear acrylic so normally a crystal clear, non-yellowing adhesive is preferred. There are a number of industrial adhesive options.

How to Bond Acrylic?

Cyanoacrylate – All grades adhere well to acrylic.  Due to acrylics susceptability, to bond acrylic with cyanoacrylate, it is important to use cyanoacrylate adhesive sparingly.  When operators try to wipe excess adhesive outside the joint away it will fog the acrylic. Cyanoacrylates offer a rapid cure in seconds, do not require any mixing or curing equipment. These adhesives are particularly suited to high speed production lines. Limitations – maximum gap fill is 0.5mm. Using alkoxy-ethyl cyanoacrylates will reduce visible powdery residue on the surface and is less pungent than a regular ethyl cyanoacrylate.

Epoxy adhesive – single component epoxies are not suitable as the heat required to cure the adhesive will damage acrylic, however,  two component epoxies will bond acrylic.  Many grades will bond, however, often clear grades such as ET500, ET515 are preferred over black or other opaque products.

MS Polymer – For a flexible bonding solution MS Polymers can be considered.  Since most acrylic is clear, MS359 CLEAR will provide a good finished appearance.

UV Curable adhesives.  Permabond UV632 and UV645 UV/Visible light cure adhesives are recommended.  Many grades of acrylic are UV stabilized – which means some or all of the UV light is blocked.  Consequently, the UV/Visible light cure is recommended to ensure cure.  Both products will produce a bond which is stronger than the substrate.

Structural acrylics – several grades are available.  MMA’s provide very good bond strength but are flammable and have a very strong odor.  As a result, they are often not acceptable so Permabond formulated low odor toughened acrylic adhesives.

To determine the best specific adhesive to bond acetal in your application, please provide some detail to our technical team and our adhesive advisors will get back to you with a recommendation.

In addition to adhesion to acrylic, several other parameters are generally involved in selecting the best adhesive. Understanding the solvent and temperature resistance of the adhesives is especially relevant in selecting the best type of product.

solvent-resist - bond acrylic
Solvent Resistance
temp-resist - bond acrylic
Temperature Resistance

Note: Products can withstand higher temperatures for brief periods providing the joint is not unduly stressed.

Tips for surface preparation:

1. Providing the surface is clean and dry and free from contamination, acrylic can generally be bonded “As Received”.
2. Engineers often choose to do a solvent wipe before bonding or for clean up afterwards and use isopropanol or Permabond Cleaner A.  Many solvents, notably acetone, are too aggressive and as a result, will attack the plastic.

Properties of Acrylic:

    • Surface energy: 38 mJ/m²
    • Maximum service temperature: 85°C
    • Softening temperature: 120°C
    • Coloured, opaque, transparent, clear or metalized

It seems like acrylic is found in every industy.  A few examples of acrylic uses follow:

  • Point of sale displays
  • Windows and skylights
  • Medical devices
  • Shop fitting
  • Signage
  • Automotive lenses and instrument panels

 

 

Contact us for more information

Contact Us

 Your information is always kept private

Products

Recent Blogs

28Jun
Permabond Europe Launches TA4207 – No surface preparation!

Permabond Europe Launches TA4207 – A new versatile, high strength adhesive Permabond TA4207 expands our existing range of methyl methacrylate (MMA) adhesives, and is a 2-part, 1:1 mix ratio product, which achieves very high shear strength...

Read more
27Jun
What are the best plastic to metal adhesives?

Permabond is often asked, "What is the best glue for metal to plastic?".  It is a tough question - it is like asking what is the BEST flavor of ice cream? As we discuss here, there are metal adhesives that bond some plastics and plastic a...

Read more
30May
How to bond acrylic to stainless steel

Bonding acrylic to stainless steel can be accomplished with a variety of different adhesive types including UV curable, structural adhesive and cyanoacrylate.  Each type has its own characteristics.  UV Curable Permabond UV632 was dev...

Read more
10Dec
Blue Center Innovation Technologies

Blue Center Innovation Technologies – Permabond’s new state of the art development, technical service & QC laboratories Misinto, Italy - 28th November 2018 Permabond has a history of developing and manufacturing engineering ...

Read more
22Jul
How to remove cyanoacrylate adhesive?

How to remove cyanoacrylate adhesive? As we discussed here, there are three basic ways to remove adhesive. Mainly, dissolving, heating, and stress. To remove cyanoacrylate adhesive most effectively, a combination of all three ways may be ...

Read more