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

03Apr
Permabond’s Structural Epoxy Adhesives for Stainless Steel

Permabond launches high strength structural adhesives for tarnish free bonding of stainless steel. Available in convenient 1:1 dual cartridges, once mixed via static mixer nozzle, these adhesives achieve full cure at room temperature (...

Read more
18Mar
How To Bond Plastic To Metal

There are metal adhesives and plastic adhesives but what to do when you want to bond plastic to metal? There are metal adhesives that bond some plastics and plastic adhesives that bond some metals. The specific substrates, as well as the surf...

Read more
13Mar
Permabond at JEC World Paris

Day 2 of JEC World Paris. Permabond is in the UK pavilion in hall 6, stand S50, and is busy helping to find bonding solutions for a diverse range of composites applications (honeycomb panels, carbon fibre automotive components, marine app...

Read more
04Mar
Permabond 2K Primer and Adhesion Promoter

Permabond 2K Primer is a dual purpose product, which indicates whether or not sufficient surface preparation has been carried out and contains an adhesion promoter to increase bond strength.  It is ideal for preparing metal, glass, plastic, ...

Read more
13Feb
Join Permabond at Design 2 Part in Grapevine TX

Join Permabond March 13th and 14th at the Design-2-Part Manufacturing Show at the Gaylord Texan Convention Center. Register here and visit Permabond in booth number  223.  

Read more
05Feb
Permabond returns to Southern Manufacturing & Electronics, Farnborough

Off to a busy start at Southern Manufacturing & Electronics! Visit us on A165 right by the entrance to find out how to maximise your adhesive's performance with Permabond 2K Primer, bond polypropylene/polyethylene WITHOUT surface prep...

Read more
21Jan
Metal Bonding Acrylic Adhesives

Metal Bonding Acrylic Adhesives Epoxies, Cyanoacrylates, and several other technologies provide excellent adhesion to metals.  Acrylic metal bonding adhesives are often chosen not only for the strong bonds to metals but also for the varie...

Read more
08Jan
Join Permabond at Expo Manufactura

Join Permabond® Engineering Adhesives at Expo Manufactura February 5th through the 7th from 1:00 p.m. to 8:00 p.m. at Cintermex in Monterrey, N.L. Mexico Register here and visit Permabond in booth number 929! Únase a Permabond® Adhes...

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
24Nov
Industrial adhesives Vs Consumer adhesives

What are industrial adhesives? How do they differ from consumer adhesives?  Strictly speaking, industrial adhesives are adhesives that are labeled for industrial use.  Various local and global bodies require industrial adhesives to include...

Read more
23Oct
5-minute epoxy – more than the name implies

Recently I received a call for a 5-minute epoxy. In general terms, 5-minute epoxy is used to refer to two-component epoxy that start to set up in around 5 minutes.  But they are not all alike.  Epoxies can vary in viscosity, mix ratio, colo...

Read more
16Oct
Pipe Size Diameter and Thread Sealant Use

Permabond LH050 general purpose anaerobic pipe sealant is for use on metal pipe.   Permabond LH050  is classified by Underwriters Laboratories Inc.® for use in devices handling gasoline, petroleum oils, and natural gas (pressure not over ...

Read more
01Oct
Plastic Threadlockers

Threadlockers fill the space between the threads which prevents vibration loosening.    Anaerobic threadlockers are used for metal fasteners; they should not be used on plastics as metal ions are required to cure the material, and they can...

Read more
16Sep
Industrial Adhesives for Dissimilar Substrates

Bonding Dissimilar Substrates It goes without saying that if you are bonding plastics use a plastic adhesive and if your bonding metal, an adhesive for metal.  It gets more complicated when you want to choose industrial adhesives to join di...

Read more
11Sep
Efficient scale up – Adhesive processes

One of the questions our tech team asks engineers seeking an adhesive recommendation is “How many assemblies will you be manufacturing?”  Although from a business perspective this is nice information to have; it is critical information t...

Read more