Five Reasons You Should Integrate Adhesives into Your LED Manufacturing Process

    September 2, 2015

Across the industry, manufacturers of LED lamps are discovering the benefits of high-performing adhesives over the use of mechanical fasteners like screws and clips. Whether comparing the two assembly methods by manufacturing cost, productivity or performance, adhesives often emerge as the most advantageous option. So, why should you consider integrating adhesives into your LED design? 

  1. Lower Manufacturing Cost

    Mechanical fasteners were preferred in decades past, but modern adhesives and manufacturing methods have largely rendered these obsolete. Light cure and other instant adhesives provide instant curing so no racking or ovens are required. Today’s adhesives also do a much better job joining tough-to-bond surfaces like powder coating, and low-energy plastics such as polypropylene or polyethylene.

    In addition, adhesives can be applied with low-cost dispensing equipment that easily and quickly converts to address different lamp/luminaire designs. Extra steps required to successfully use adhesives in the past — things like primers, special surface preparation, oven energy costs and adhesive cure time — are no longer cost drivers.

  2. Simplified Designs

    Adhesives and sealants can fill gaps up to .25 inches, allowing for looser parts molding and stamping tolerances, as well as simpler designs than those required for attachment with screws or clips. An adhesive bond line also seals out dust and moisture without the use of separate rubber or composite gaskets. By using adhesives, your LED designs will perform better and look sleeker, thanks to no unsightly hardware.

  3. Improved Production Throughput

    Adhesives boost manufacturing throughput by eliminating such production steps as drilling, threading, and the insertion and tightening of screws, washers, nuts, rivets, etc.

  4. Long Term Performance

    The bond strength and long-term fatigue resistance of adhesives is up to 20 times that of mechanical fasteners, especially when thermal cycling, vibration and dissimilar substrates are being joined, which is typically the case for LED assemblies. Adhesives eliminate galvanic corrosion of contact between metal parts, and stress cracking of plastics joined by mechanical fasteners. There is also no risk of luminaire damage from over-tightened screws or clip installation.

  5. Lighter Weight Lamps

    Adhesives weigh less than metal fasteners, but that only tells half the story. With mechanical fasteners, bond-line load stress tends to be concentrated at each clip or screw or rivet hole. With adhesives, stress is evenly distributed, which has a beneficial impact on overall rigidity. This in turn makes it possible for manufacturers to use thinner gauge metal or plastics in the lamp/luminaire body. 

Ready to Explore the Benefits of LED Adhesives?

We offer a free engineering consultation and teardown analysis of your designs to discover opportunities where savings and design improvements with adhesives are possible. Want to talk with one of our engineers? Contact us now.

A Game-Changing Adhesive

Henkel recently introduced LOCTITE® 4090™ Hybrid Adhesive, a next-generation hybrid adhesive with the rapid cure of an instant adhesive and the mechanical toughness and water resistance of an epoxy. For more information, click here.

About the Author, Matt Donelan

Matt Donelan is a Market Development Director for Henkel North America based in Rocky Hill, Conn. His responsibilities cover the Electrical and Optical segments including Lighting, Wire Harnesses, and Electric Motors. Matt has over 20 years of experience at Henkel in both marketing and product management positions. He also has design, test, and manufacturing engineering experience in the aerospace, optical, medical and electronics industries. Matt holds a bachelor's degree in mechanical engineering from The University of Connecticut and an MBA from the University of Hartford.

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