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They've undoubtedly discovered the hard way just how difficult and expensive it is to achieve any sort of consistent product with recycled plastic. You can pro
by jqpabc123 3y ago
They've undoubtedly discovered the hard way just how difficult and expensive it is to achieve any sort of consistent product with recycled plastic.
You can produce "something" --- but it will usually be a blackish/gray mess that is hard to re-color with variable viscosity, melting point and other properties that make it hard to mold in mass --- and the result probably won't look like something that should end up in your kid's mouth.
There are some valid use cases for recycled plastics but kid's toys may not be one of them.
- westurner 3y agoWhat LEGO brick colors can be made with unbleached biocomposites ("bioplastics") from e.g. soy, hemp, and algae? /? lego hemp plastic: https://www.google.com/search?q=lego+hemp+plastic https://www.google.com/search?q=lego+hemp+plastic /? stronger and lighter than steel and aluminum [hemp] https://www.google.com/search?q=Stronger+and+lighter+than+steel+and+aluminum+hemp https://www.google.com/search?q=Stronger+and+lighter+than+st... And also TIL about /? 2DPA-1 melamine waterproof coating: https://www.google.com/search?q=2DPA-1 https://www.google.com/search?q=2DPA-1 Though TBH layers of recycled paper pulp and phenolic resin might work; https://news.ycombinator.com/item?id=36857929 https://news.ycombinator.com/item?id=36857929 : > RichLite, Paperlite, and Paperstone make recycled paper outdoor waterproof vert ramps, countertops, siding, and flooring; but not yet roofing FWIU? ... and they're sandable and buffable. Also FWIU, Hemp Wood is made with a sustainable (organic?) binder (in currently still one factory in KY, USA), which is a different process than High Pressure Injection Molding or 3d printing with organic filament.
- westurner 3y agoInterlocking hempcrete blocks by: JustBiofiber https://www.youtube.com/results?search_query=just+biofiber https://www.youtube.com/results?search_query=just+biofiber "Eco-Friendly Construction Breakthrough: Lego-like Hempcrete Blocks That Don't Require Framing https://www.core77.com/posts/91260/Eco-Friendly-Construction-Breakthrough-Lego-like-Hempcrete-Blocks-That-Dont-Require-Framing https://www.core77.com/posts/91260/Eco-Friendly-Construction... : > The benefits of the hempcrete bricks is that they're lightweight (easier to transport), fireproof, serve as natural insulators that also regulate moisture, and they're eco-friendly--hemp plants lock up C02 as they grow. [Carbon sequestion, Nitrogen fixation] > The downside of hempcrete bricks is that they were not load-bearing, and could only be installed with a framed structure, as shown below. [...] > However, Canadian company JustBioFiber has managed to eliminate that downside, while also adding an innovation that makes the bricks even easier to assemble into a structure. What they've done is to integrate a proprietary structure hidden within each brick itself, so that they can actually function as load-bearing. "We can currently build 3-4 story buildings, with each project having 3rd party structural engineering signoff," the company claims.
- westurner 3y agoRounded radial block dimensions would be helpful; round homes (and siloes) minimize wind shearing force. LEGO Bricktales does 3D CAD with Design Verification with Simulation; build a bridge and test it out, journey to other worlds, etc. https://www.google.com/search?q=lego+bricktales https://www.google.com/search?q=lego+bricktales Verification and validation > Categories, Aspects: https://en.wikipedia.org/wiki/Verification_and_validation#Categories_of_validation https://en.wikipedia.org/wiki/Verification_and_validation#Ca...
- westurner 3y ago"Algae-based blocks could make for a more sustainable building" (2023) but what about LEGOs? https://news.ycombinator.com/item?id=37693225 https://news.ycombinator.com/item?id=37693225