	US 7,527,842 B2
	Reclosable packaging
Stefan Mathy, Berlin (Germany); and Annett Kaeding, Bad Fallingbostel (Germany)
Assigned to Wipak Walsrode GmbH & Co. KG, Walsrode (Germany)
Appl. No. 10/542,622 PCT Filed Jan. 19, 2004, PCT No. PCT/EP2004/000365 § 371(c)(1), (2), (4) Date Nov. 30, 2005, PCT Pub. No. WO2004/065255, PCT Pub. Date Aug. 05, 2004.
Claims priority of application No. 103 02 320 (DE), filed on Jan. 20, 2003.
Prior Publication US 2006/0088677 A1, Apr. 27, 2006
Int. Cl. B32B 27/08 (2006.01); B32B 33/00 (2006.01)

U.S. Cl. 428—36.7 [428/34.1; 428/35.2; 428/35.3; 428/35.4; 428/35.7; 428/35.8; 428/35.9; 428/36.4; 428/36.6; 428/40.1; 426/127]

34 Claims

1. A reclosable packaging unit comprising an interior space for filling with a filling material, said packaging unit comprising:

A) a lid composed of a first sealable multilayer film, said first sealable multilayer film comprising:

a′) a first sealing layer facing the interior space; and

g′) a first carrier layer positioned outside of said first sealing layer and further removed from said interior space than said first sealing layer; and

B)a packaging tray composed of a second sealable multilayer film, said second sealable multilayer film comprising:

a) a second sealing layer facing the interior space; and

g) a second carrier layer positioned outside of said second sealing layer and further removed from said interior space than said second sealing layer;

wherein the packaging tray comprises in an edge region thereof a sealing seam;

wherein the lid is joined to the packaging tray via said sealing seam; and

wherein only one of the first sealable multilayer film or the second sealable multilayer film, but not both, further comprises in order proceeding from the respective sealing layer towards the respective carrier layer:

b) a layer of adhesion promoter;

c) a migration barrier composed of at least 75% by weight ethylene-vinylalcohol copolymer, said migration barrier having a thickness of <2μm; and

f) a layer of pressure-sensitive adhesive.