Sealing Paper Packaging Without Adhesives

(fraunhofer.de)

42 points | by gnabgib 5 hours ago

6 comments

  • RRWagner 1 hour ago
    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.
    • skyberrys 59 minutes ago
      Me too, I'm glad I read through the article, but the Japanese shop wrapping technique is interesting too.
  • skyberrys 1 hour ago
    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).
  • fritzo 2 hours ago
    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?
  • adolph 3 hours ago
    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"
  • goodmythical 1 hour ago
    >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.

    • pseudosaid 1 hour ago
      dont be like that. so semantic youre missing the point so you can dote on yourself.

      I feel like its pretty obvious they mean an adhesive in the sense of an additional substance or agent. Just because they use a laser to modify the paper structure to effectively become sticky, doesnt detract at all from the goal and point of the title. that no additional products/agent/glues were needed.

      absolutely missing the point of it all just to jerk your ego off.

      this is so prevalent on HH that it’s normalized and most the cerebral bozos cant read between lines beyond their self righteous vantage.

      • DoctorOetker 56 minutes ago
        I think the remark -while rude- brings up an important point: is the in-situ generated adhesive compatible with the paper recycling processes? if so, it seems that simply applying the discovered in-situ chemicals artificially would be faster and not rely on CO2 laser tube set-up (they don't last forever).

        If it IS compatible with the later recycling steps, then what prevents us from simply applying a similar or simplified mix of chemicals generated by the CO2 laser treatment?

        Suppose some adhesives already use the same or similar chemicals, the question would arise if you really discovered a compatible glue, or if you just discovered a proper dosage in your application? We can keep coming up with elegant research showing this or that is compatible with a certain recycling step, in the case that some players in industry use inappropriate amounts of glue, the problem would not be a lack of compatible glues but proper dosing, or tracing the manufacturer / end-users of the glue/paper combination that gunked up some recycling process.

        • pseudosaid 25 minutes ago
          no one mentioned recycling. you introduced that. the above poster is simply conflating altering a materials surface to be sticky, with applying a 3rd party compound to achieve tack. its intellectually tacky, and i dont even know what youre doing. youre just leveraging this to bring about a point of your own, which is deserving of being its own parent comment. but in earnest reply, the question I have is in the change in material surface that becomes sticky. How does that become incompatible with current recycling processes if the base material was compatible? I dont know enough chemistry but it seems to me the post-co2-treatment material should break down the same way in an industrial recycling process.
    • cindyllm 1 hour ago
      [dead]
  • RobotToaster 2 hours ago
    I guess string was too complicated?