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- From: tylerh@cco.caltech.edu (Tyler R. Holcomb)
- Newsgroups: ca.environment
- Subject: Re: Plastic Recycling and little reality
- Message-ID: <1jmq33INNa77@gap.caltech.edu>
- Date: 21 Jan 93 18:29:55 GMT
- References: <ll9e0rINNcbu@exodus.Eng.Sun.COM> <5837@gold.gvg.tek.com> <1j7cp7INN8s5@gap.caltech.edu> <1993Jan18.093032.15069@resonex.com>
- Organization: California Institute of Technology, Pasadena
- Lines: 70
- NNTP-Posting-Host: punisher.caltech.edu
-
-
- I made this several days ago, my a local software problem made it bounce.
- Try #2....
-
-
- frankm@resonex.com (Frank Muennemann) writes:
-
- >In article <1j7cp7INN8s5@gap.caltech.edu> tylerh@cco.caltech.edu (Tyler R. Holcomb) writes:
- >> [munch]
-
- >> ... Clearly, before recycling is economic,
- >>one must reduce the variance of the feedstock....
-
- >Here's something I wonder about: Suppose government were to restrict
- >the variety of plastics which may be used in non-durable containers.
- >(OK, so I'm a damn Liberal for thinking gov'ment can solve ANYTHING :-)
- >Suppose even that there were a small number of permitted COLORS in
- >the plastic. Marketeers would probably HATE that idea, but maybe they
- >could get into distinctive shapes for bottles, or maybe they could
- >even sell products based on superior performance of the product rather
- >than more distictively colored packaging...
-
- >Would such restrictions on the materials "out there" make it possible
- >to separate the different kinds at (consumer's) recycling time, so that
- >PET can be returned to PET, and HDPE to HDPE, etc.? How restrictive
- >could the "list" of allowed plastics be before consumers see a
- >significant constriction of products available on supermarket shelves?
-
- >I suppose glass recycling might be a model for this. Does anyone
- >have numbers demonstrating the success (or lack thereof) of glass
- >recycling?
-
- This is a very interesting idea. I have no facts, but I never let
- that stop me. Here is my guess.
- much of the *cosmetic* variance (eg. differnt colors and reflective
- materials in the label) could be done away with. The marketeers
- would scream, but that is a good sign that this is probably
- a useful thing. However, I don't think that this would help all that much.
-
- Consider just two classes of products: motor oil containers and milk containers.
- Among motor oil containers, there is tremendous cosmetic variance that
- could removed with no economic or functional loss. Most of the containers
- use the same underlying material (a polypropylene - ?hexene? copolymer).
- Milk containers have very little cosmetic variance: thery are virtually
- all uncolored High-density polyethylene. However, even with the cosmetic
- problem resolved, these two plastics are still very different: the
- the feedstock variance problem has not really been reduced by much. Why not use
- the same plastic for both? because both applications place very stringent
- (and very different) specifications on the packaging material. "Plastics"
- have the great advantages of being lightweight, cheap, and
- *easily varied* to meet the needs of specific applications. THus, I think
- your idea would work for products with similar specifications. FOr economic
- reasons, most of such products will tend to use similar plastics anyway.
-
- Thus, I think the idea has merit, but will not have (by itself) have a
- very large impact. I still think charging (by volume) for garbage
- is a great first step.
- > [munch]
- > I nonetheless believe that it's
- >fundamentally the consumer's responsibility to care about what
- >he buys and does with his purchases: Don't buy from manufacturers
- >whose products trash the Earth.
-
- Here here. We agree on this point.
-
- --
- ---------------------------------------------------------------------------
- Tyler Holcomb * "Remember, one treats others with courtesy and repsect *
- tylerh@juliet * not because they are gentlemen or gentlewomen, but *
- caltech.edu * because you are." - paraphrased from Garth Henrichs *
-