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Materials & Assembly
Light Cure Technology Bonds Adhesives
12/27/2011

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A simple and immediate in-line process, the Loctite AssureCure Systemincludes a new adhesive technology, a fiber optic light source, a light detector unit, and software that ties into the user's existing PC or PLC.
A simple and immediate in-line process, the Loctite AssureCure Systemincludes a new adhesive technology, a fiber optic light source, a light detector unit, and software that ties into the user’s existing PC or PLC.

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Rob Spiegel
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New adhesive as well as testing?
Rob Spiegel   12/27/2011 8:13:55 AM
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Is Henkel providing a new adhesive as well as a new testing system? Is the testing based on light? Does the adhesive change color on curing. Is that how the test equipment determines a sound cure?

Beth Stackpole
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Re: New adhesive as well as testing?
Beth Stackpole   12/27/2011 8:31:41 AM
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If Henkel isn't providing an adhesive along with this new testing system, it seems you might have identified some good partnership opportunities, Rob. It would seem that the light cure technology and test system would need to part of the same package/installation. I would hate to be one of those manufacturers that invested in the light cure technology only to find later on that the lightening source didn't curate the bond and I was stuck with a sizeable inventory of defective parts. Even the threat of such a scenario would quash any interest in the bonding technology, I would think.

williamlweaver
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Re: New adhesive as well as testing?
williamlweaver   12/28/2011 10:28:54 AM
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A visit to Henkel's AssureCure(TM) website contains a tab for Adhesives. It displays an image of Henkel LOCTITE 3924AC, which I assume contains the AC suffix for use with the AssureCure system. Their technology overview does not give specifics but it appears that it is a reflective or emissive technology that utilizes LEDs or Diode Lasers for illumination and fiber optics for collection. The displayed response signal is broad like an IR spectrum but from the configuration it looks like it may be based on RAMAN scattering. Changes to the RAMAN features exhibited between the cured/uncured adhesive would probably not be very large. Henkel provides a technical paper in which they mention a "specially developed algorithm" that calculates a direct correlation to the adhesive's degree of cure. I am definitely interested in learning more about their technology.

Ann R. Thryft
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Blogger
Re: New adhesive as well as testing?
Ann R. Thryft   12/28/2011 12:44:32 PM

A number of years ago, a version of some of this tech was used by my

dentist, who put a UV cured compound that remained white on some of

my teeth in lieu of metal fillings. The newer cure times are wicked fast. I wonder if this technology has or will soon reach medical and dental applications?


Tim
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UV light cure
Tim   12/29/2011 8:56:15 AM
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As a kid, mr orthodontist used a "new" adhesive to adhere my braces to my teeth. It was a quick procedure that avoided the long time spent in the chair. It worked well and was quick. This is something that could really help manufacturing items that need quick adhesion.

naperlou
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Re: New adhesive as well as testing?
naperlou   1/3/2012 10:43:06 AM
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William, you may have already thought of this, but since the article mentions a FTIR measurement, I expect that they had identified a signature of cured material in Fourier space. 

williamlweaver
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Platinum
Re: New adhesive as well as testing?
williamlweaver   1/3/2012 11:33:08 AM
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naperlou - The manufacturer does mention a good correlation between their technique and FTIR. My consternation involved a fiber optic detection probe. I'm familiar with reflective FTIR techniques such as Attenuated Total Reflection (ATR) and Diffuse Reflection (DRIFTs), but I've only seen them used with sample stages and compartments having very known and calibrated sample geometries and optics. My suggestion of Raman was that it is a sister vibrational technique that often employs fiber optic probes as part of the detection optics. I don't know if Henkel is keeping the information close to the vest to simplify the technology or to keep it proprietary. I would love to learn more about it. -Bill  =]

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