HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Engineering Materials

Photodegradable Plastic Bags--Yes, They Are Bad

NO RATINGS
View Comments: Threaded|Newest First|Oldest First
ejw
User Rank
Iron
I beg to Differ: You are confusing bio and photo degradable!
ejw   1/6/2012 10:50:03 AM
NO RATINGS
Hi Doug,

Your post is interesting, but I am afraid that you are confusing bio-degradable bags and photo-degradable bags.  Thus there are some factual errors in your article.   Photodegradable bags, such as ECOgrade bags, are not bio-degradable, and therefore do not have the issues associated with your comments.  Specifically, 

1)   Plastics have value as recovered commodities,

AGREED:  Certain photo-degradable bags, such as ECOgrade, can be recycled, and therefore maintain this value.

2)   The biodegradable additives don't reduce the carbon footprint of packaging,

TRUE FOR BIODEGRADABLE, BUT NOT PHOTODEGRADABLE.  Photodegradable bags contain 46% less plastic resin, and produce 34% less Greenhouse Gas in preproduction, as well as use less energy in manufacture.  They do not produce GHG upon degradation.

3)   The degradable additives jeopardize recycling streams, and

NOT TRUE FOR CERTAIN TYPES, SUCH AS ECOGRADE.  ECOgrade does not contain toxins that jepordize recycling, and do not degrade once mixed in the recycling stream

4)   They will not solve the littering problem.

Depends how you define this.  We all beleive people should not litter.  But if littered, photodegradable bags will degrade and go away, minimizing risk to wildlife and the resulting "urban tumbleweed"

The European Plastics Recyclers Association don't address the issue of the degradability of plant-based plastics, which may reduce the carbon footprint of packaging, but have  the additional problem of pulling corn, potatoes and other plants from human food supply.

AGAIN, THIS IS BIO-DEGRADABLE:  Photodegradable bags do not contain corn, potatioes, and other food items.

THiese are common confusions, and misspercetions.  I hope this clarification helps clear this up.  For more information you can view FAQs at http://www.gxtgreen.com/page/menu_3/12908.html

 

Partner Zone
More Blogs from Engineering Materials
Last week, the bill for reforming chemical regulation, the TSCA Modernization Act of 2015, passed the House. If it or a similar bill becomes law, the effects on cost and availability of adhesives and plastics incorporating these substances are not yet clear.
The latest crop of coating and sealant materials and devices has impressive credentials. Many are designed for tough environments with broad operating temperature ranges, and they often cure faster, require fewer process steps, and produce less waste.
A new program has been proposed for testing and certify 3D printing filaments for emissions safety. To engineers who've used 3D printers at home this is a no-brainer. It's from a consumer on Kickstarter, and targets use in homes and schools.
For the last 50 years, the Metal Powder Industries Federation (MPIF) has sponsored an awards competition for creative solutions to designing and fabricating near-net-shape parts using powder metal (PM) technologies. Here are the seven Grand Prize winners of the 2015 contest.
Graphene 3D Lab has added graphene to 3DP PLA filament to strengthen the material and add conductivity to prints made with it. The material can be used to 3D print conductive traces embedded in 3D-printed parts for electronics, as well as capacitive touch sensors.
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 6 - 10, Building Raspberry Pi Controllers with Python
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service