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Non-Tech : The Children's Beverage Group (TCBG)
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To: Dave Shoe who wrote (2231)1/4/1999 2:54:00 AM
From: Dave Shoe  Read Replies (1) of 2452
 
I might as well mention a fundamental laser principal here. Non geeks will want to skip this.

A visible light laser beam would travel right through a clear plastic film without heating it up. Obviously an infrared or ultraviolet laser must be used in the TCBG's 'visibly clear' application. While there is a probability that the selected film will become opaque at the laser frequency - meaning the photon energy would be stopped, absorbed by the plastic, and turned into heat as desired - it is more likely that the film will remain clear, or only slightly opaque, at the laser frequency, resulting in much energy waste and poor energy control.

A non-toxic, frequency-specific, optical additive can be mixed with the polyester resin to create optical opacity at precisely the laser frequency. If it is present in sufficient trace quantities it will not allow the laser light to penetrate the plastic at all. All energy will be absorbed at the outermost film depth allowing only the heat to penetrate. The burn pattern in the plastic can be controlled parametrically.

Hey, that's it. Forget that defocusing baloney.

Also, I just remembered why the Amosorb 3000 is better than metal or glass. It not only blocks oxygen, it actually absorbs (it might be an 'adsorb' function) it from the headspace inside the pouch (hence the 'scavenge' term). You can probably call Amoco Chemical to determine whether their film is microwave approved.

Remember, this is all guesswork on my part. Don't bet on it.

Time for me to be quiet again.

Shoe.
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