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Cellulose Film /Cellophane ©

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Patentpedia Index 

4/29/2016 through 4/29/2016

1 Patent Abstracts

1 Patent Titles

2 Topics

     Cellulose (E)  

     Film (C) 

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* Note:  This collection is not complete.  Items may be missing and whole weeks may not be covered.  "Perfection is not of this world!"  Please send Maro missing patent numbers  for inclusion.  Experts are invited to send important, basic patents  or patents on new Topics. (RDC 4/29/2016)
 (cornelrd@bee.net )

 

1 Notes

     1. Cellophane

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1. Cellophane

“Cellophane is a thin, transparent sheet made of regenerated cellulose. Its low permeability to air, oils, greases, bacteria, and water makes it useful for food packaging. "Cellophane" is in many countries a registered trade mark of Innovia Films Ltd based in Wigton, Cumbria, United Kingdom.”

“Cellulose from wood, cotton, hemp, or other sources is dissolved in alkali and carbon disulfide to make a solution called viscose, which is then extruded through a slit into a bath of dilute sulfuric acid and sodium sulfate to reconvert the viscose into cellulose. The film is then passed through several more baths, one to remove sulfur, one to bleach the film, and one to add glycerin to prevent the film from becoming brittle.”

Cellophane, Wikipedia, 4/29/2016

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Copyright 2016 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

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Roger D. Corneliussen, Editor
Professor Emeritus
Materials Engineering
Drexel University, Philadelphia, PA
Editor
Maro Publications
Telephone: 610 363 1533
Email:
cornelrd@bee.net
Website: 
http://maropolymeronline.com/