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: Oldest First|Newest First|Threaded View
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
In this second materials slideshow from NPE2015, we've got some plastics that vendors were showcasing, including products made with them, and others that were brand-new introductions at the show.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Many of the materials in this slideshow are resins or elastomers, plus reinforced materials, styrenics, and PLA masterbatches. Applications range from automotive and aerospace to industrial, consumer electronics and wearables, consumer goods, medical and healthcare, as well as sporting goods, and materials for protecting food and beverages.
Engineers trying to keep track of the ever-ballooning number of materials and machines for additive manufacturing and 3D printing now have some relief: a free searchable database with more than 350 machines and 450 different materials.
At JEC Europe Dow Automotive introduced a new ultra-fast, under-60-second molding cycle time for its commercial-grade VORAFORCE 5300 epoxy resin matrix for carbon composites. It's aimed at high-volume automotive manufacturing.
Design News Webinar Series
3/31/2015 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.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.
Mar 30 - Apr3, Getting Hands-On with Cypress’ PSoC
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


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