What is the recommended minimum bond line thickness?
A general guideline for minimum bond line thickness is between 25 to 150 microns (1 to 6 mils) – as a starting point. I recommend you choose a certain level to start, then make a few thicker and thinner versions of the bond. Take time to inspect completed bonds carefully to learn how a bond can fail, evaluate the performance for your application, and adjust bond line thickness as necessary to achieve a quality bond.
For every application, bond line thickness depends on:
- The geometry of the bond area
- The substrates being bonded
- The material itself (the epoxy’s chemistry can dictate a specific minimum bond line thickness)
- The temperature cycling the bond will need to survive
- Proper surface preparation (improper cleaning can negate adhesion)
- The cure time and method of cure
- Bond line thickness and curing time go hand-in-hand to achieve sufficient adhesion and performance. Carefully review the epoxy manufacturer’s datasheet, including any charts showing bond line thickness versus cure time for the various curing methods.
READ THE FULL BLOG ARTICLE HERE: Bond Line Thickness & More: Answers to Common Epoxy Questions
Answered by AskFOC Technical Team February 13, 2019
Have a technical question for Fiber Optic Center?
Please email your question to AskFOC@focenter.com and we will respond ASAP.
- Fiber Optic Center AskFOC: does FOC have many customers using AngstromLap polishing film or are other brands more prevalent? - April 22, 2019
- FOC Tips: visual inspection is made easier with an automated fiberscope - April 18, 2019
- Fiber Optic Center AskFOC: no changes in fiber optic cable assembly production process, but measured IL and RL values of product aren’t as good as they were-could there be something wrong with the measurement equipment? - April 17, 2019
- Press Release: Fiber Optic Center, Inc. Expands Marketing Department; Joni Montemagno joins as Director Marketing Promotions - April 17, 2019
- Press Release: Fiber Optic Center, Inc. announces FOC 20–5-1 campaign to support Children’s Cancer Research #20mtns5states1mission - April 16, 2019
- Fiber Optic Center AskFOC: in APC polishing is conical or step ferrules more expensive? - April 16, 2019
- FOC Tips: importance of controlling the amount of epoxy inside the ferrule-holder - April 15, 2019
- FOC Tips: Quick troubleshooting checklist for common APC polishing issues - April 11, 2019
- Fiber Optic Center AskFOC: We have issues with crystallized epoxy: has the epoxy had “gone bad”? - April 10, 2019
- Press Release: Fiber Optic Center, Inc. announces the appointment of Kelly Michael Skelton as Systems Architect - April 9, 2019