EP 1392766 A1 20040303 - METHOD FOR OBTAINING LDPE FROM USED PLASTIC FILMS
Title (en)
METHOD FOR OBTAINING LDPE FROM USED PLASTIC FILMS
Title (de)
VERFAHREN ZUR GEWINNUNG VON LDPE AUS GEBRAUCHTEN KUNSTSTOFFOLIEN
Title (fr)
PROCEDE D'EXTRACTION DE PEBD DANS DES PELLICULES PLASTIQUES USEES
Publication
Application
Priority
- DE 0202051 W 20020606
- DE 10127875 A 20010608
Abstract (en)
[origin: WO02100932A1] A method for obtaining LDPE from used plastic films, comprising the following steps: low-molecular components are extracted from the film material which is dissolved in a second organic solvent; the film material thus treated is dissolved selectively in at least one third organic solvent, whereby a polymer solution of a determined concentration is produced; at least one disruptive polymer is precipitated out of the polymer solution by applying shearing forces to said solution; the LPDE is obtained from the remaining polymer solution. The starting material can be ground film arising from dry or wet treatment.If the ground film arises from dry treatment, the step wherein the film material is washed in a first organic solvent, resulting in a suspension, and printing ink adhering to the surface is washed, is performed at an earlier stage.
IPC 1-7
IPC 8 full level
B01D 9/02 (2006.01); B01D 11/02 (2006.01); B29B 17/04 (2006.01); C08J 11/06 (2006.01); C08J 11/08 (2006.01)
CPC (source: EP)
B29B 17/02 (2013.01); C08J 11/08 (2013.01); B29B 17/0412 (2013.01); B29B 2017/0015 (2013.01); B29B 2017/0293 (2013.01); B29K 2023/0633 (2013.01); B29L 2007/00 (2013.01); C08J 2323/06 (2013.01); Y02W 30/62 (2015.05)
Citation (search report)
See references of WO 02100932A1
Designated contracting state (EPC)
BE FR GB IT NL
DOCDB simple family (publication)
WO 02100932 A1 20021219; DE 10127875 A1 20030130; EP 1392766 A1 20040303; JP 2004532922 A 20041028
DOCDB simple family (application)
DE 0202051 W 20020606; DE 10127875 A 20010608; EP 02742797 A 20020606; JP 2003503695 A 20020606