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Posted by: Tisa on 4/23/05 Title: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1366
we'd like to do some new research to mix cd with other material, the cd must be in clear colour condition first just like the first time thay were made.therefore we need to know if there's anybody who has information how to remove the aluminium layer completely and efficiently from the metalissed cd, for most the CDs we have are in metalized condition. Appreciated all the helping information.thank you.

Responses

Posted by: Barry @ SKR on 4/26/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1369
We do not have a full solution, but some sort of electrical process if likely the best bet. We're experimenting with a few ideas, but nothing so far that will completely remove that layer, aside from shredding the CD.

Posted by: Tisa on 4/28/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1372
Dear Barry, Thanks for the suggestion. How we can make the layers off completely by shredding the cd?if we shredd them ,what we can use to remove the layers ? Really appreciated your helping.

Anyway, is diaper or pampers valuable ? have lot of them here, and usually just being burnt.

Posted by: Barry @ SKR on 5/2/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1376
Still working on a complete removal, even after shredding. Again, have some ideas, but all are only in the experimental & "drawing board" stage. We are trying to do things fairly 'low tech', with readily available equipment, but applying some unique ideas. We generally try to remarket things like CDs in non-traditional ways, but there is always 'residual' material that is not suitable for what we do, so in steps the need for inexpensive materials separation. We now are just accumulating unsuitable CD's, which will be shipped when a large enough quantity is reached to make it worthwhile to send them to a recyler who will purchase them by the Tonne. Mind you, if we find another alternate market for the residual material, we might put the aluminum/plastic separation on the back burner. Used diapers appear to not have much of a use......the market that exists is for virgin diaper scrap...and it is even limited, though we are accpeting it free of charge, and have an alternative market for it, though it is of low value even in that market.

Posted by: Mike Johnston on 5/17/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1385
Have you tried using a planer, (used to turn roughcut wood into smoth boards)?. It would seem to me that the aluminum layer would be at a set depth for the optical readers to be able to read it accurately. Set the planer to slightly less than that depth and you could remove the plastic for recyling. Turn it over and you could do the other side as well,(probably a different depth though). Depending on how accurate your process and the depth of the aluminum layer you should be able to shave off somewhere in the high 90%'s of the plastic.

Mike J.

Posted by: Michael Yang on 5/19/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1392
Hi, everybody, I am doing the old CD recycle business, if any one of you have large quantity of CD or PET, PP, PC materials, please contact me, I can offer the suitable price to purchase them.

Michael Yang

Posted by: Tisa on 5/20/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1396
dear Barry,

thanks for the solution.we'll try it anyway to see the come out.

For Mike, your idea is possible too. Because we need the efficient idea to remove the layers completely beside what we've already been doing.

Thanks a lot.

Posted by: Tisa on 5/20/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1397
To Michael ,

My company is a CD/VCD and toys manufacturer also an export import company. We import virgin materials and export the scraps we got from our production.We always got some kind of plastic scraps from our production such as of course the pc cd, also a little pp, pps, pom, and acrylic. The other plastics we got are pc clear, pc mix color transparent, abs, and nylon. But those factory scraps are not much as the consumer scraps. Sometimes to lessen the production cost, we try to mix some materials with some recycle materials from industrial and consumer post. Still if you're interested with those scraps, you can contact us...there's some of the scraps that we don't use anymore from our production result.

Posted by: Barry @ SKR on 5/21/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1399
90% isn't enough to leave pure aluminum, which is the higher dollar value material, but it might actually be advantageous to be combined with an electrical process. Actually, a sander of some kind might work, also, but then there is contanimation from the grit. Will have to look into this further...now to find an accurate planer for a reasonable sum.

Have another idea, also, that in theory should work very well, but need to custom manfufacture a different machine to do it, also. Can only manage one project at a time & we have very limited funds.

Posted by: Barry @ SKR on 5/21/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1400
Sorry, so preoccupied with our removing aluminum layer that I forgot the aluminum layer is micorthin. We are trying to get our process to extract both materials. Shaving/planing of the one side still results in contamination of the plastic from the paint of the advertising, which will still be an issue. Anyways, just brainstorming...and at a late hour.

Posted by: Sean Melvin on 7/14/05 Title: Re: how to remove the cd's aluminium layer?
Postnum: 304 EntryID:1427
I have mistakenly removed the aluminum layer by washing cd's in the dishwasher - maybe the hot water and then the heat when drying created this effect.


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