Title:
FEEDBLOCK FOR MANUFACTURING MULTILAYER POLYMERIC FILMS
Document Type and Number:
WIPO Patent Application WO/2011/139618
Kind Code:
A3
Abstract:
A feedblock including a first packet creator that forms a first packet including a first plurality of polymeric layers, the first plurality of layers including at least four first individual polymeric layers; and a second packet creator that forms a second packet including a second plurality of polymeric layers, the second plurality of layers including at least four second individual polymeric layers, wherein the first and second packet creators are configured such that, for each packet creator, respective individual polymeric layers of the plurality of polymeric layers are formed at approximately the same time. The feedblock may include a packet combiner that receives and combines the first and second primary packets to form a multilayer stream. In some examples, at least one of the first and second primary packets may be spread in the cross-web direction prior to being combined with one another.
Inventors:
NEAVIN TERENCE D (US)
BIEGLER ROBERT M (US)
FAY WILLIAM T (US)
BIEGLER ROBERT M (US)
FAY WILLIAM T (US)
Application Number:
PCT/US2011/033724
Publication Date:
April 05, 2012
Filing Date:
April 25, 2011
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
NEAVIN TERENCE D (US)
BIEGLER ROBERT M (US)
FAY WILLIAM T (US)
NEAVIN TERENCE D (US)
BIEGLER ROBERT M (US)
FAY WILLIAM T (US)
International Classes:
B29C48/08; B29C48/21; B29C48/305; B29C48/495; B29C48/70; B29C48/92; B32B37/00; B29C48/71
Foreign References:
| JP2003251675A | 2003-09-09 | |||
| KR20070018069A | 2007-02-13 | |||
| US5795528A | 1998-08-18 | |||
| US5108844A | 1992-04-28 |
Other References:
See also references of EP 2566677A4
Attorney, Agent or Firm:
VIETZKE, Lance, L. et al. (Saint Paul, Minnesota, US)
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