EP 1877250 A2 20080116 - PERMEABLE POLYPROPYLENE FILM
Title (en)
PERMEABLE POLYPROPYLENE FILM
Title (de)
DURCHLÄSSIGE POLYPROPYLENFOLIE
Title (fr)
FILM DE POLYPROPYLENE PERMEABLE
Publication
Application
Priority
- US 2006007751 W 20060303
- US 11467105 A 20050426
Abstract (en)
[origin: WO2006115585A2] A permeable, propylene-containing film structure including a core layer containing a propylene polymer matrix that has been cavitated by a two- component cavitation system, wherein the first component of the two-component cavitation system is a beta-nucleating agent to produce the beta-crystalline form of polypropylene and the second component is a filler. The film structure also includes first and second thermoplastic skin layers on either side of the core layer, respectively. A method of manufacturing a permeable propylene-containing film structure, including: forming a melt containing a propylene polymer, a beta- nucleating agent and a filler; cooling the melt to form a film layer; and stretching the film layer. The film structure has a water vapor transmission rate greater than 300 g/m<SUP>2</SUP>/day and a Gurley air permeability less than 3,000 s/10 cc.
IPC 8 full level
B32B 27/20 (2006.01); B32B 27/18 (2006.01); B32B 27/32 (2006.01); C08K 3/22 (2006.01); C08K 5/092 (2006.01); C08K 5/098 (2006.01)
CPC (source: EP)
B32B 3/26 (2013.01); B32B 3/30 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/20 (2013.01); B32B 27/32 (2013.01); C08K 5/0083 (2013.01); B32B 2250/03 (2013.01); B32B 2250/242 (2013.01); B32B 2255/10 (2013.01); B32B 2255/205 (2013.01); B32B 2274/00 (2013.01); B32B 2307/41 (2013.01); B32B 2307/518 (2013.01); B32B 2307/546 (2013.01); B32B 2307/558 (2013.01); B32B 2307/724 (2013.01); B32B 2307/75 (2013.01); B32B 2405/00 (2013.01); B32B 2439/46 (2013.01); B32B 2439/70 (2013.01); B32B 2519/00 (2013.01)
Citation (search report)
See references of WO 2006115585A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006115585 A2 20061102; WO 2006115585 A3 20070607; CA 2605363 A1 20061102; EP 1877250 A2 20080116
DOCDB simple family (application)
US 2006007751 W 20060303; CA 2605363 A 20060303; EP 06721152 A 20060303