You are correct it was Matraplast that marketed that product. People were not willing to pay the extra $ and they dropped the product.Not sure if it took off, but a few years ago someone was trying to push some biodegradable coro. Never bought it, and forgot the supplier, but it is out there.
Youre in Canada. Anywhere that takes plastic. Will take coroplast. You just have to tell them the type of plastic it is and pack it neatly for them.It can be technically but I haven't found anywhere locally yet that will take it.
Coke is actually testing paper based bottles this summer.So the "Corogreen" material was kind of a joke based on my research. They added a cornstarch type product to the mix which helped the plastic break down faster in a landfill. This made the signs brittle and caused them to start falling apart while still in use.
We decided against using anything like this because (In my opinion) this does more harm than good. A yard sign that makes it to a landfill isn't all that great, but once it's there, it's in the pile of all the other trash. Slowly breaking down. Not doing any more damage than the yogurt container it's sitting next to. A yard sign that starts to degrade while on the side of the road ends up as microplastic in the waterways.
Everyone wants a cheap, durable, rigid material to make signs out of. A true unicorn. Corrugated plastic is that unicorn. It is a phenomenal product! For the same reason that Coke, with all their resources, still use plastic (PET) bottles. It's cheap, durable, and recyclable. If only we could get demand for recycled material to a point where it was cost effective.
I'm further north now in Courtenay. I called the various recycle lines, no one here that I have found takes Polypropylene Code 5 that isn't a food container.You're in Victoria
Railroad stock is about a 6 or 8 ply shocard, but isn't white-white. It's kinda mottled. It's what anything temporary was printed on from as far back as I can remember. Printed as in screen printed. It's waterproof for about maybe 6 months for outside. No Parking signs, political signs, quick sales and many other cheap applications, where actual shocard wasn't needed for strength. Regular shocard was about 14 ply.What is railroad stock? Is it like foam board?
Coke is actually testing paper based bottles this summer.
They do want to get rid of plastics but mostly the technology and price is just not there yet for large scale operation.
Now both will eventually get there, it just takes time.
Another thing they have issue with is alcohol, which it seems like they slowly start to figure out as well.The pressure of a carbonated drink adds additional complexity. Even that product has a thin plastic liner and a plastic cap though.