Plastic Made From Corn

Dekaner writes "A major supplier of plastic products in the U.S. will soon open a new factory that makes products from corn. The Cargill Dow factory in Blair, Nebraska will convert corn into a biodegradable substance called NatureWorks PLA. It will be used to make soft-drink cups, salad containers and to fill pillows and comforters. The corn-derived polymer will compete directly with products made from petroleum."

Comments

Easily incorporated

[n-baxley]

I think the biggest advantage that this has over other "Natural" alternatives is that it will be easily converted to by polymer manufacturers. This article talks about how the NatureWorks stuff is delivered to manufacturers. It comes in small plastic pellets that manufacturers are used to handling. There are some adjustments to be made, the article doesn't mention what they are, but the plants will not have to completly retool to begin using this. I suppose that if they could tool their plants in such a way as to use either the NatureWorks or petroleum based pellets, they could play the two technologies off each other and lower the cost of producing things. Not that we'd see any price reduction, but the thought is nice.

But is is REALLY biodegradable?

[Telecommando]

I remember many (10?) years ago a company was promoting a corn-based, plastic grocery bag which they said would deteriorate and disolve in a few months when exposed to sunlight and water.

Iowa City Magazine (now defunct) decided to test it and attached one to a post in back of their offices. Each month they published a photo of the bag and reported on it's condition. After a year they decided that apart from some slight tearing of the bag by the wind where it was attached to the post, there was no sign of any deterioration.

None.

On the other hand, I regularly get shipments of equipment packed in biodegradable corn starch 'peanuts' which dissolve rapidly when exposed to water. Easy to dispose of I guess, but more than once I've had UPS drop off a package on my doorstep in the rain and I come home to a box of soggy, goo-encrusted equipment. YUCK!