Wheat—A New Option for Carry-Out Containers
Copyright © 1995-2004
Scott Adams.
Celiac.com 09/29/2004 - Those lightweight, polystyrene containers that some restaurants give you for carrying home leftovers or take-out meals are known in the foodservice industry as "clamshells." Their hinged-lid construction indeed resembles the architecture nature uses for clams, oysters, and other familiar bivalves.
Every year, billions of these clamshells and other foodservice containers made from petroleum-based foams end up in already overstuffed landfills. Slow to decompose, they become yet another environmental burden.
But the containers, along with other disposable foodservice items such as plates, bowls, and cups, can also be manufactured with biodegradable ingredients.
ARS plant physiologist Gregory M. Glenn is working with EarthShell Corp., the California-based innovators of potato-starch-based foam products such as burger boxes, to create environmentally friendly disposables made with starch from wheat, the world's most widely planted grain. His wheat-starch-based prototypes are sturdy, attractive, convenient to use, and just as leakproof as their polystyrene counterparts. Glenn is with the Bioproduct Chemistry and Engineering Research Unit at ARS's Western Regional Research Center in Albany, California.
Why use wheat starch in packaging? Because it offers manufacturers of foodservice products another choice among starches when they're buying raw materials. That purchasing flexibility can help keep their prices competitive with the polystyrene products. Another important cost savings: The machinery already used to make EarthShell's potato-starch-based containers is suitable for the wheat-starch products as well. That sidesteps the need for costly retooling at manufacturing plants.
"The machines are presses or molds that work something like giant waffle irons," explains Glenn. "First, a wheat-starch batter is poured onto the heated mold, which is then closed and locked. Moisture in the batter generates steam that, in turn, causes the batter to foam, expand, and fill the mold. The steam is vented and, when the baking is finished, the mold is opened, the product is removed, and the cycle starts again. This whole process takes less than a minute."
A water-resistant coating, added later, helps the container keep its strength and shape when it's filled with a hot, juicy cheeseburger or creamy pasta alfredo leftovers, for example. But once the container hits the backyard compost pile or municipal landfill, it biodegrades in only a few weeks.
Perhaps having our ready-to-eat meal packed for us in a guilt-free throwaway container, such as a wheat-starch-based clamshell, will make eating those foods even more enjoyable.—By Marcia Wood, Agricultural Research Service Information Staff.
This research is part of Quality and Utilization of Agricultural Products, an ARS National Program (#306) described on the World Wide Web at www.nps.ars.usda.gov.
Gregory M. Glenn is in the USDA-ARS Bioproduct Chemistry and Engineering Research Unit, Western Regional Research Center, 800 Buchanan St., Albany, CA 94710; phone (510) 559-5677, fax (510) 559-5818.
"Wheat—A New Option for Carry-Out Containers" was published in the September 2004 issue of Agricultural Research magazine.
Additional comments by USDA Plant Physiologist Gregory Glenn on 9/20/2004:
Due to a current market shortage of wheat starch, the containers will be made of corn starch. However, you bring up a very valid concern and at some point the containers may be made of wheat starch. We are very sensitive to the concerns that Celiac sufferers have regarding wheat-based products. I spoke with Dr. Bassi of MGP Ingredients. MGP is a major supplier of wheat starch. Dr. Bassi is very aware of the concerns about Celiac disease and serves on an international committee that addresses this concern. Dr. Bassi can be reached at MGP Ingredients at 800-255-0302. Let me summarize our conversation. Wheat allergens are comprised of protein or wheat gluten. The starch component itself is safe and would only be a risk if contaminated by gluten. Dr. Bassi explained that current food regulations specify that gluten levels below 200 ppm can be labelled "gluten free" and are deemed safe for consumption by the general public. Wheat starch produced by MGP has a protein level of 5 to 30 ppm which is well below the required 200 ppm level. Our wheat starch containers are only about 50% wheat starch and they have a film or coating on the container that provides moisture resistance.
It would also act as a barrier between the food product and the wheat starch. Thus, a food product would not come into direct contact with the wheat starch. As I mentioned earlier, the containers are currently being made of corn starch. However, the containers would be safe, even for those with wheat allergens, if the containers were made of wheat starch.
|
|
Celiac.com Sponsor: |
Wheat Containers
#1
Posted 01 October 2004 - 11:36 AM
#2
Posted 01 October 2004 - 11:39 AM
#3
Posted 01 October 2004 - 11:44 AM
#4
Posted 01 October 2004 - 12:59 PM
Inconclusive Blood Tests, Positive Dietary Results, No Endoscopy
G.F. - September 2003; C.F. - July 2004
Hiker, Yoga Teacher, Engineer, Painter, Be-er of Me
Bellevue, WA
#5
Posted 01 October 2004 - 02:33 PM
This topic came up in the group, USA Silly-Yaks and someone mentioned that a friend who has a corn allergy or something reacts to dixie cups.....anyway, I feel like there are already so many things we have to be careful of....so now for this to be a concern is even worse.
And I know that they can't guarantee that we don't get "glutened" from them. What if that "film or coating" got punctured somehow without the person realizing it? What if some defect in a machine leaves part of the wheat-container uncovered and food touches it? This idea seems like a horrible idea....and for people with corn allergies, this obviously isn't good news, either.
#6
Posted 01 October 2004 - 10:38 PM
Ah, you get what I mean.
#7
Posted 02 October 2004 - 05:45 AM
#8
Posted 02 October 2004 - 08:21 AM
one other thing to think about - and I haven't researched this enough to know yet - but the process that requires wheat starch for turning into containers may require extremely pure starch - proteins may mess up the process. we do already debate over codex wheat starch, which has been tested to have very low levels of gluten, and doctors in Europe believe is safe for celiacs, and we should probably try to determine if the starch used for these containers has had the protein successfully removed.
Inconclusive Blood Tests, Positive Dietary Results, No Endoscopy
G.F. - September 2003; C.F. - July 2004
Hiker, Yoga Teacher, Engineer, Painter, Be-er of Me
Bellevue, WA
#9
Posted 02 October 2004 - 10:49 AM
It just seems a little odd to make food containers that people will be allergic to. I understand the need to make them biodegradable, but there has to be a better way. Isn't paper biodegradable? It might take a bit onger, but it will eventually breakdown. And you can recycle foil, so it seems like there are other options out there.
God bless,
Mariann
Mariann, gluten intolerant and mother of 3 gluten intolerant children
#10
Posted 02 October 2004 - 11:22 AM
#11
Posted 02 October 2004 - 02:22 PM
The tin foil layer is a good idea.
#12
Posted 31 October 2004 - 12:21 AM
#13
Posted 31 October 2004 - 06:01 PM
#14
Posted 01 November 2004 - 07:37 AM
The Lord bless you and keep you; the Lord make His face shine upon you and be gracious to you." Numbers 6:24-25
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users








