EP 4384364 A1 20240619 - METHOD FOR PRODUCING A PLASTIC GRANULATE, AND USE OF THE GRANULATE
Title (en)
METHOD FOR PRODUCING A PLASTIC GRANULATE, AND USE OF THE GRANULATE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES KUNSTSTOFFGRANULATS, UND VERWENDUNG DES GRANULATS
Title (fr)
MÉTHODE DE PRODUCTION D'UN GRANULÉ DE PLASTIQUE ET UTILISATION DU GRANULÉ
Publication
Application
Priority
- CH 0701542021 A 20210811
- EP 2022072357 W 20220809
Abstract (en)
[origin: WO2023017038A1] The invention relates to a method for producing granulate for the production of extrusion-blow-moulded hollow bodies, the method comprising the steps of: (a) sorting, by type, washing and comminuting PET articles originating from post-consumer collection of plastic packaging; (b) removing contaminants such as metal or paper before, at the same time as or after method step (a); (c) premixing PET material from various by-type sorting processes according to step (a) such that the Trouton ratio of the mixed PET material at a shear rate of 50 to 200 s-1 is less than 4; (d) drying the PET material obtained from step (a) and (b); (e) melting the dried PET material; (f) pressing the PET material through a melt filter; (g) dividing the PET material into individual melt flows; (h) cooling and solidifying the melt flows in a water bath and granulating, wherein the granulates obtained have an intrinsic viscosity of 0.5 to 0.75 dl/g; (i) crystallising the granulates; and (j) drying and condensing the crystallised granulates in a solid-phase polycondensation reactor until they obtain an intrinsic viscosity of 1.0 to 1.7 dl/g.
IPC 8 full level
B29B 9/06 (2006.01); B01J 2/20 (2006.01); B29B 9/12 (2006.01); B29B 9/16 (2006.01); B29B 17/02 (2006.01); B29B 17/04 (2006.01); B29C 48/00 (2019.01); C08J 3/12 (2006.01)
CPC (source: CH EP US)
B29B 9/02 (2013.01 - CH); B29B 9/06 (2013.01 - EP US); B29B 9/065 (2013.01 - EP); B29B 9/10 (2013.01 - CH); B29B 9/12 (2013.01 - CH EP US); B29B 9/16 (2013.01 - EP US); B29B 13/04 (2013.01 - US); B29B 13/065 (2013.01 - US); B29B 13/10 (2013.01 - US); B29B 17/02 (2013.01 - CH EP US); B29B 17/04 (2013.01 - CH); B29B 17/0412 (2013.01 - EP); B29C 48/0017 (2019.02 - EP); B29C 48/0022 (2019.02 - EP); B29C 48/287 (2019.02 - EP); B29C 49/0005 (2013.01 - EP); B29C 49/04 (2013.01 - EP); B29D 22/003 (2013.01 - US); C08J 3/124 (2013.01 - EP); C08J 11/06 (2013.01 - CH US); B01J 2/20 (2013.01 - EP); B29B 9/065 (2013.01 - US); B29B 2009/165 (2013.01 - EP US); B29B 2013/002 (2013.01 - US); B29B 2017/0015 (2013.01 - CH); B29B 2017/0224 (2013.01 - EP); B29B 2017/0255 (2013.01 - EP); B29B 2017/0268 (2013.01 - EP); B29K 2067/003 (2013.01 - CH EP US); B29K 2105/0094 (2013.01 - US); B29K 2105/26 (2013.01 - EP US); B29K 2995/0022 (2013.01 - US); B29K 2995/0082 (2013.01 - US); B29K 2995/0089 (2013.01 - US); C08J 11/06 (2013.01 - EP); C08J 2300/30 (2013.01 - EP); C08J 2367/02 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2023017038 A1 20230216; CH 718886 A1 20230215; CN 117881515 A 20240412; EP 4384364 A1 20240619; MX 2024000849 A 20240220; US 2024342959 A1 20241017
DOCDB simple family (application)
EP 2022072357 W 20220809; CH 0701542021 A 20210811; CN 202280055564 A 20220809; EP 22765426 A 20220809; MX 2024000849 A 20220809; US 202218683234 A 20220809