Re: Biodegradable Plastics Standard to Bust Landfill Waste
Ann R. Thryft 1/12/2012 12:17:23 PM
Re: Biodegradable Plastics Standard to Bust Landfill Waste
sjmonte@4kenrich.com 11/23/2011 2:43:15 PM
todavidpalmer: ihavere-postedmypreviousmessagewithspacingbelow. asyoucannowsee,item2addressestheissueofrecyclability. thetitanateadditivewillnotonlynot interferewithuserecycling,itwillcopolymerizethedissimilarpolymersinthemeltactingasatitanocene-like(metallocene)catalystimprovingmeltflowandmechanicalproperties. seespegpectechpapersandothers:titanatesandzirconatesforrecycled,compostableandbiobasedpolymercomposites–gpec2009 titanateandzirconatecouplingagents–akeytoenvironmentalinnovation-gpec2007 http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html http://www.4kenrich.com/content/officers.html
Re: Biodegradable Plastics Standard to Bust Landfill Waste
Dave Palmer 11/23/2011 2:15:31 PM
@Salvatore: Your comment is almost unreadable due to the lack of spaces between any of the words. If you click on "Edit/Delete," you can fix this.not recycle could be difficult.
anaerobicbiodegradationofconventionalplasticsisalreadycoveredbyastmd5526-94,whichbasicallyrequiresacontrolledlandfillhavinggreaterthan40%moisture,nooxygen,nosunlight,andanaerobicmicrobessuchasprovidedintheformofgarbageandfeces.theplasticsenvironmentalcouncil(pec)shouldkeeptheastmstandardinmindsothattheydon'treinventthewheel,butimproveonit.http://www.4kenrich.com/content/officers.html
Oxodegradable additives
TimDunn 11/21/2011 5:23:41 PM
I have never seen a study verifying that an ordinary oxodegradable product such as a shopping bag will biodegrade given its normal treatment - taken to the landfill in the trash, where it will be covered in more trash within a day or two, if not immediately. Based on the published science, I agree with the DEPRA report, which found that they will not biodegrade in landfills. This DEPRA report was the reason why COOP and Tesco, the largest grocery chains in Great Britain, stopped using oxodegradable additives in their bags. As far as methane goes, it's being tapped and used in place of ordinary natural gas. In fact, much of the methane generated in landfills is eaten by microbes in the landfills. See http://earthnurture.com/LandfillCondTD.html to learn more.
Biogas
TimDunn 11/21/2011 5:18:37 PM
Landfills are complicated places. To learn about biogas and landfills see:
Re: A new class of additives to induce biodegradation in polymers
TimDunn 11/21/2011 5:16:58 PM
Enso is not a manufactuer of additives, it is a dealer specializing in an additive for biodegrading PET. They represent Bio-Tec, which makes the additive. My additives are in the same general class, but they are a more thorough, more recent technology.
Re: A new class of additives to induce biodegradation in polymers
TimDunn 11/21/2011 5:13:50 PM
Hydrobiodegradable plastics are a plastic type, and the best known example is PLA. Oxodegradable additives are additives mixed with polyolefinic plastics, to act as a catalyst to chemically degrade them. The reason some moisture is required is to sustain the lives of the microorganisms. It has been said that the most germ-fee place in the average home is the toilet seat, because it is so dry. My additives work with all of the typical commodity plastics - PP, PE, HDPE, LDPE, LLDPE, PS, EPS, PET. I have designed one additive that will render PLA biodegradable in landfills. PLAs most prominent manufacturer says it is not biodegradable in landfills. See http://earthnurture.com for full details.
Re: A new class of additives to induce biodegradation in polymers
Ann R. Thryft 11/21/2011 12:34:59 PM
Tim, this sounds very interesting. I believe that hydrobiodegradable and oxobiodegradable are terms describing the two basic classes of plastics, not of additives. Does your additive work for one of these classes? The additives described in the research mentioned in this article work anaerobically in moist and/or wet environments, e.g., landfills and bodies of water. That implies that your additive works with hydrobiodegradable plastics. Is that correct?
Re: A new class of additives to induce biodegradation in polymers
Dave Palmer 11/21/2011 11:38:43 AM
@TimDunn: How do the additives which your company sells differ from the ones discussed in this article, (for example, the ones made by ENSO)?
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