Cellophane / Cellulose forms other than film
Cellophane / Cellulose forms other than film
(OP)
Hello,
I'm considering using Cellophane in an application to reduce CO2 permeability in a pressurized container. Can anyone tell me if cellophane can be formed into any shapes other than film? I.E. can it be used as a coating, extruded, injection molded, etc?
Thanks for your time!
I'm considering using Cellophane in an application to reduce CO2 permeability in a pressurized container. Can anyone tell me if cellophane can be formed into any shapes other than film? I.E. can it be used as a coating, extruded, injection molded, etc?
Thanks for your time!





RE: Cellophane / Cellulose forms other than film
RE: Cellophane / Cellulose forms other than film
http://en.wikipedia.org/wiki/Plastic_wrap
As each is a different polymer, it's permeability to CO2 will be different. In some cases very different.
So, first we have to determine which polymer is under discussion then look for some specific data. There are books on this topic. The most comprehensive one I know of is:
Permeability Properties of Plastics and Elastomers, 2nd Ed., Second Edition: A Guide to Packaging and Barrier Materials
http://www.amazon.com/Permeability-Properties-Plas...
As far as forming goes, there are moldable types of cellulose such as cellulose acetate propionate from Eastman. It can be injection molded and thermoformed for example. The other polymers mentioned can too. You can dramatically improve the barrier by adding a platy mineral such as high aspect ratio mica.
Dr. Chris DeArmitt
Plastics consultant to the Fortune 500: www.phantomplastics.com
Webinars on plastics, fillers & impact modification: www.plastictraining.com
RE: Cellophane / Cellulose forms other than film
I've got a copy of a similar paper (same name but written by Laurence McKeen) which is what originally lead me down the Cellophane path. And yes, I am referencing Cellophane and not a generic "Plastic Wrap". From a CO2 permeability perspective Cellophane is far superior than any other material I've come across thus far (.309 cm^3 mm / m^2 day atm vs 2.51 and 3 for Kel-F and Parylene C respectively).
Thank you for the Cellulose Acetate Propionate suggestion, I'll look into it. Offhand, can I expect similar permeability performance compared to pure Cellophane?
Thanks again for your help,
Matt
RE: Cellophane / Cellulose forms other than film
Dr. Chris DeArmitt
Plastics consultant to the Fortune 500: www.phantomplastics.com
Webinars on plastics, fillers & impact modification: www.plastictraining.com
RE: Cellophane / Cellulose forms other than film
RE: Cellophane / Cellulose forms other than film