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
Airbus Defence and Space has 3D printed titanium brackets for communications satellites. The redesigned, one-piece 3D-printed brackets have better thermal resistance than conventionally manufactured parts, can be produced faster, cost 20% less, and save about 1 kg of weight per satellite.
At IMTS last week, Stratasys introduced two new multi-materials PolyJet 3D printers, plus a new UV-resistant material for its FDM production 3D printers. They can be used in making jigs and fixtures, as well as prototypes and small runs of production parts.
GE Aviation not only plans to use 3D printing to mass-produce metal parts for its LEAP jet engine, but it's also developing a separate technology for 3D-printing metal parts used in its other engines.
The demand for solar energy around the world will grow a total of 75% by 2019, according to a new report by Lux Research. Trade disputes and policy changes, though, will complicate the picture.
Bayer MaterialScience is using CO2 to produce a precursor for high-quality polyurethane foam at its pilot plant in Leverkusen. The transition to full-scale manufacturing is expected in 2016.
Design News Webinar Series
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Sep 22 - 26, MCU Software Development A Step-by-Step Guide (Using a Real Eval Board)
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


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.
Next Class: September 30 - October 2
Sponsored by Altera
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service