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What is up sustainable packaging people!?

Heyo!

Hello and happy first Friday of 2012!

Today’s post is going to pick up on a conversation I began following the PET Recycling and Extrusion Forum I attended in October; it revolves around the role machine technology plays in PET thermoform recycling.

October 21st post titled “Humbled by the Machine” discusses how there appears to be a disconnect between those designing packaging for recycling and those designing the machines capable of recycling said packaging. What this means is that while PET thermoforms are technically recyclable with PET bottles, little investment has made into how PET thermoform flake vs. PET bottle flake is reprocessed. In other words, while companies like S+S Sorting have insanely efficient machines for recycling PET bottle flake, I don’t know if the same can be said for PET thermoform flake. Check out the email I sent to the gentleman I met from S+S Sorting at the Forum inquiring into this assumption:

I was hoping you could help explain why the sorting technology your company manufacturers is only designed to reprocesses PET bottles, as opposed to PET thermoforms or other variants of PET. Is there a technical difference between bottle-grade PET and thermo-grade PET insofar as your machines’ ability to reprocess the material successfully? In other words, if your machines accepted mixed bales of PET bottles and thermoforms would they be able to “reprocess” the material into bottle-grade PET flake/pellets? Would the thermo-grade PET be interpreted as a contaminate or undetectable to the sortation technology?

And his response:

The presentation I did at the P.E.a.R. Forum in Chicago covered only the recycling of PET bottles because this is at the moment the market we see the biggest interest in.
Furthermore this is the industry which is the most relevant one for S+S Sorting Technology at the moment.

For sure the S+S sorters are able to sort other types of material (thermoforms, glass, metal scrap, E-scrap...)

What we have to consider especially for PET thermoform recycling is that the material is in general a bit lighter than the PET bottles.

This means that the throughput rates on the sorters will be lower...

In general the separation of PVC contaminants, metals, and off colors will work in the same way for thermoforms as for PET bottles.

What is important is that the thermoforms are well singulated and spread out on the conveyor belt of the sorter.

For this a proper working pre-treatment is absolutely necessary (bale opener, bale breaker, ballistic separator, overband magnet, maybe an eddy current system, vibratory feeder and then the sorter...)

In general the easiest way to explain this in more detail is a concrete project with figures like throughput rates, contamination levels, output quality...

Based on this information we can go into more details.

The reason I am picking up on this dialogue started in October now is because my friend at S+S informed me yesterday that they are conducting a pilot in which different types of PET flake, including thermoform, will be reprocessed on their existing lines to gain more knowledge about different type of flakes and impurities. My friend even said he would compile the information resulting from the pilot—specifically the technicalities of reprocessing PET bottle flake vs. PET thermoform flake—for my blog! What a guy!

Expect feedback in 1-2 weeks, yay! What do you think will happen?!?

[polldaddy poll="5828274"]

Have a great weekend—it is like 60 degrees in Chicago today, crazy!

Hey yall!

Sooo I know I said I was going to post today on the SPC meeting BUT I recieved a response to yesterday's post from Ron Sherga who is super duper well versed in PET recycling. He is currently an advisor on recycling and sustainable strategies at Heritage Environmental Services, as per his LinkedIn profile.

Check out our exchange below:

Chandler, here are the challenges in regards to your question.

Basically, there are two ways to sort on a large scale commercial level.

One is using optic sorting equipment, or more accurately, near infrared or NIR. this will not work on black . There is no fast way to discern a black colored materials composition using fast scanning technology.

The second method is to size reduce and process thru a system where materials are separated based on their specific gravity. This is done using centrifuge machinery and various fluid designs.... But let's call it a salt water medium.

Other than these and hand sorting (which relies on eyesight and touch); that's about it.

And my response:

Hey thanks!

I understand that the sortation technologies you describe are usually employed at the MRF/PRF facility…what I am interested in are the types of machines companies like S+S Sorting manufacture, which are often bought by the big wigs of PET recycling (Coke), and therefore more proactive in recycling PET materials into RPET flake, bottles, etc. In other words, I am trying to learn more about the privatization of PET recycling technology and why this technology is only being designed to recycle PET bottles. Does this make sense? I confuse myself sometimes!

Hmmmmm...

More details to come following my conference call with S+S Sorting!

Tomorrow's post WILL discuss feedback from the SPC meeting, specifically, the SPC's suggestion of "collective reporting" amongst it's member companies.

AND, did you guys know of this conference!?! It was just brought to my attention, but looks AMAZING!

OH, and check out this Packaging Digest article-- your powerhouse in stilletos is quoted, ha! I think if my head gets any bigger, it's going to explode! But in an awesome way.

Tootles!

Hello and happy Friday!

So last week I presented at the Polyester Extrusion and Recycling Conference in Chicago on progress in recycling thermoforms since I published my Recycling Report in 2010. I’m really glad I went to this conference though the content diverged dramatically from the usual packaging and sustainability conferences I attend. As the name would imply, those speaking and attending this event were stakeholders in the extrusion and recycling machinery market; hence, I was amongst the ranks of representatives from Starlinger, Kreyenborg, EREMA, S + S Sorting, etc. These gentlemen (I was the only woman speaker) held extremely prestigious degrees in mechanical and chemical engineering from a variety of domestic and international universities, most having 10+ years experience in the plastics industry. Holy Toledo.

It is not a fair assessment to say I was intimidated by these gentleman and their extensive knowledge into plastic extrusion and recycling but I was humbled by their insights insofar as it presented yet another dimension to the complexities surrounding recycling in America. To date, my research into the recycling of clamshells has been dictated by a certain perspective, which can best be explained as a macroscopic view of waste management that focuses exclusively on post consumer residential waste and the market and technological requirements necessary for the economical recovery of a specific packaging material/type in the North American context. What was not included in this paradigm, therefore, was the privatization of the recycling technology market and the disconnect between those designing packaging and those designing machines capable of recycling said packaging. In other words, I have spent almost two years trying to understand the barriers to recycling thermoforms from a waste management perspective i.e. what waste management needs to begin collecting new materials for recycling; issues discussed include critical mass i.e. material generation in the waste stream available for recovery, supply and demand, international vs. domestic consumption of recyclables, sortation systems, specs for collection and baling, etc. What was not included in said analysis was the technical aspect to recycling, that is, how machines are designed or not designed to recycle/reprocess a specific material/packaging type. Several speakers in the recycling machinery market discussed their machine innovations and how said innovations allow post-consumer PET bottles to be reprocessed into an array of products from direct-food contact sheet and containers to strapping and/or polyester fiber/textiles. The technology was so sophisticated that it would maintain a homogenous IV, eliminate any spec of contaminant, be it dirt, sand, metal, etc., and produce clean flake, pellet, or product. It was crazy the level of sophistication that these machines seem to offer. However, most of the machinery discussed requires bales of PET bottles for reprocessing, with no attention given to PET thermoform bales or PET thermoform and bottle bales. Though it was not touched upon exclusively and I may not be well versed enough in these issues to comment, it seems as though these machines are developed primarily and exclusively to reprocesses PET bottles and any other derivative of PET, specifically thermoforms, are not considered nor desired. This observation leads one to conclude that if we are serious about recovering PET thermoforms, either within the PET bottle stream or as its own thermoform-PET exclusive stream, we need to collaborate with those manufacturing the recycling machines and technology.

I sent one of the presenters from S + S Sortation an email looking for more information on thermo-PET vs. bottle-PET in the context of what their recycling machines are capable of reprocessing and get more information on why the machines favor PET bottles exclusively. In a nut shell, I want to understand why there are no machines that were discussed at this conference that cater to recycling PET thermoforms + PET bottles OR PET thermoforms exclusively: Is it because lack of supply, investment, economics, etc.

Stay tuned!

AND, for your viewing pleasure, check out this video from Pack Expo—it’s my friend from Ecovative and I discussing the collaboration between our two companies on the design of their thermoformed “grow trays” for their new cooler product line.