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A laser-based process that enables adhesive-free paper packaging
41–50 of 57 posts
Re: A laser-based process that enables adhesive-free paper packaging
#42I'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?
Kokuyo Stapleless Stapler
In US, you can find it on Amazon for 15-20 bucks.
Re: A laser-based process that enables adhesive-free paper packaging
#43Earlier quoted context omitted.
Fraunhofer has a ton of top of the line innovations. I'm glad it exists. If the only way to exist is for them to collect on patents they've produced, I don't see the issue.
I'd gladly take every Fraunhofer "innovation" 5 years later if it meant Fraunhofer didn't exist. Compression patent extortionists are the scum of the earth.
Who said only 5 years? How does that change if it's 20 years? Or never?
The monkey's paw curls. Now they were all invented by Oracle...
Re: A laser-based process that enables adhesive-free paper packaging
#44Close 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.
Re: A laser-based process that enables adhesive-free paper packaging
#45"By irradiating the paper with a CO laser, we create refusible, sugar-like reaction products"
Can we do this at home with two sheets of paper and a lighter?
Re: A laser-based process that enables adhesive-free paper packaging
#46Re: A laser-based process that enables adhesive-free paper packaging
#47Since Fraunhofer is a notorious patent extortionist, best to not even look at this page.
Fraunhofer has a ton of top of the line innovations. I'm glad it exists. If the only way to exist is for them to collect on patents they've produced, I don't see the issue.
No quite the opposite.
A critic ones put this: Fraunhofer has the same of employees as Eth Zurich but just 20% of the start ups.
There are better institutions for deep tech like Sprind and even max Planck institutes.
Re: A laser-based process that enables adhesive-free paper packaging
#48Earlier quoted context omitted.
It is but it completely defeats the claimed purpose of bein adhesive free.
Not my field by any means, but I think it's primarily to avoid adhesives that are difficult to handle during recycling. Turning the paper molecules into simple sugars and using thosr as an adhesive is presumably beneficial because the sugars would easily dissolve in the water when the paper is recycled. Most other industrial adhesives as I understand it are hydrophobic, so aren't as easily removed.
Looks like using expensive technology to provide exactly the same effect that was provided by the cheap starch-based adhesives that were used for paper when I was a child.
I really hate the people who have thought that it is a good idea to replace the water-soluble starch-based adhesives that were used for labels on bottles when I was a child with modern adhesives that are insoluble in water and which are a huge PITA if you want to reuse a bottle and you want to remove the labels from it.
Re: A laser-based process that enables adhesive-free paper packaging
#49Earlier quoted context omitted.
The main constituent of paper is wood, which consists of hydrocarbons.
Hydrocarbons are not carbohydrates.
Carbohydrates are oxidized hydrocarbons and hydrocarbons are reduced carbohydrates.
They can be and they are interconverted, both in living beings and in the industry.
In paper, most of the wood components except cellulose have been removed, so paper usually consists mostly of carbohydrates.
In general any adhesive is neither a hydrocarbon nor a carbohydrate, but a derivative of them. Natural adhesives are usually derived either from proteins, e.g. various kinds of animal glues, or from starch or from various kinds of gums or of resins or of latex.
Bitumen has been used as an adhesive that consists mostly of hydrocarbons, but it also includes some oxidized components that provide most of the adhesion, as pure hydrocarbons have lubricating properties, not adhesive properties.
Re: A laser-based process that enables adhesive-free paper packaging
#50Earlier quoted context omitted.
It is but it completely defeats the claimed purpose of bein adhesive free.
Not my field by any means, but I think it's primarily to avoid adhesives that are difficult to handle during recycling. Turning the paper molecules into simple sugars and using thosr as an adhesive is presumably beneficial because the sugars would easily dissolve in the water when the paper is recycled. Most other industrial adhesives as I understand it are hydrophobic, so aren't as easily removed.
True, and this sounds very cool.
But might it just be easier to develop and apply similar sugar adhesives, or other compatible or soluble adhesives (in quantities that will not affect the recycling process)?
OFC, if you never introduce anything new, it is easier to feel like it is a "pure" process. Yet, what says the heat treatment isn't actually creating new molecules that could be recycling-incompatible, even though they never "add" any new material?