alt Hacker NewsA laser-based process that enables adhesive-free paper packaging
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Interestingly, you can similarly friction weld wood without added adhesive.
The welding utilizes the existing ligand glue that holds the wood fibers together, as it's essentially a natural composite.
Since Fraunhofer is a notorious patent extortionist, best to not even look at this page.
What a cool read? I didn't expect lasers to be the answer. I use rubber bands all the time to hold paper wrap together. I thought the answer would be rubber bands or strings (analog version).
That is really neat:
“By irradiating the paper with a CO laser, we create refusible, sugar-like
reaction products that we use instead of the synthetic materials or adhesives
that would otherwise be required to seal the paper by the heat sealing
process. In this way, we are essentially producing our own adhesive"Close where I am living (Tuscany) there is a small industrial district focused on adesive paper production. I had sent this link to a friend of mine that is working as plant manager for one of those.
>Sealing Paper Packaging Without Adhesives
>"“By irradiating the paper with a CO laser, we create refusible, sugar-like reaction products that we use instead of the synthetic materials or adhesives that would otherwise be required to seal the paper by the heat sealing process. In this way, we are essentially producing our own adhesive in the form of the cleavage products,”
So y'all are sealing paper packagin without adhesives by using adhesives. Brilliant.
Would it really have been so bad to have included the word "Adding" in the title? Because now that you plainly admit that you are using an adhesive I feel as if you've deliberately lied to farm attention. And if you'll lie for attention...well, then, what else will you lie for?
It's a really neat idea. Using lasers to melt the lignans and such...but why not just lean in to that? "Sealing Paper Packaging with Lasers!" Or "Sealing Envelopes with Lasers" or idk...
It's just...you are using an adhesive while claiming not to. It is an adhesive that you manufacture in-situ and without adding any other chemicals, but it is in fact an adhesive. Like, if I said I could start a fire without a fire starter, but then used a bow drill, you'd roll your eyes, right? Because a bow drill is obviously a fire starter.
"By irradiating the paper with a CO laser, we create refusible, sugar-like reaction products"
I thought that this was going to be illustrations of the marvelous ways that the Japanese wrap and secure gifts without using any tape. When I was in Japan years ago I would tell them that a purchase was a gift just to see how they wrapped things. I might even still have something that I never unwrapped because the finished thing was a work of art in itself.
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I guess string was too complicated?
I've also seen a glue-less paper binding trick where two pieces of paper are finely crimped together with some high pressure tool in alternating v^v^v^ patterns, actually making tiny tears in the paper. Does anyone know what kind of tool does that?