EP 1028838 A1 20000823 - METHOD FOR PRODUCING MULTI-LAYERED PREFORMS
Title (en)
METHOD FOR PRODUCING MULTI-LAYERED PREFORMS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON MEHRSCHICHTIGEN VORFORMLINGEN
Title (fr)
PROCEDE DE PRODUCTION DE PARAISONS MULTICOUCHE
Publication
Application
Priority
- CH 9800471 W 19981104
- CH 254097 A 19971104
Abstract (en)
[origin: WO9922926A1] The inventive method for producing multilayered preforms makes it possible to create extremely thin layers, especially a thin surface layer and/or a thin barrier layer. These thin layers are at the most 35 % and 5 % respectively of the overall volume. They are produced using a multi-component injection moulding form tool which is operated in such a way that the plastic component provided for creating the thin layers is conveyed through the innermost jet chamber. Said plastic component has a slightly higher temperature and is therefore slightly viscous. Preforms produced in this way are characterised by a surface layer representing less than 35 vol. % or a barrier layer representing approx. 5 vol. %.
IPC 1-7
IPC 8 full level
B29C 45/16 (2006.01)
CPC (source: EP)
B29C 45/1603 (2013.01); B29C 45/1643 (2013.01); B29C 45/1646 (2013.01); B29C 2045/1648 (2013.01); B29C 2045/1656 (2013.01); B29C 2045/2872 (2013.01); B29C 2949/0819 (2022.05); B29C 2949/0872 (2022.05); B29C 2949/3009 (2022.05); B29C 2949/3012 (2022.05); B29C 2949/3016 (2022.05); B29C 2949/302 (2022.05); B29C 2949/3028 (2022.05); B29C 2949/303 (2022.05); B29C 2949/3036 (2022.05); B29K 2105/253 (2013.01)
Citation (search report)
See references of WO 9922926A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL
DOCDB simple family (publication)
WO 9922926 A1 19990514; CA 2303766 A1 19990514; CH 692573 A5 20020815; EP 1028838 A1 20000823; JP 2001521837 A 20011113
DOCDB simple family (application)
CH 9800471 W 19981104; CA 2303766 A 19981104; CH 254097 A 19971104; EP 98951147 A 19981104; JP 2000518830 A 19981104