US 11,702,263 B2
Packaging container and film production
Frank Heermann, Lotte (DE); and Albert Prigge, Ibbenbüren (DE)
Assigned to Bischof + Klein SE & Co. KG, Lengerich (DE)
Appl. No. 16/633,188
Filed by Bischof + Klein SE & Co. KG, Lengerich (DE)
PCT Filed Jun. 18, 2018, PCT No. PCT/EP2018/066051
§ 371(c)(1), (2) Date Jan. 23, 2020,
PCT Pub. No. WO2019/020275, PCT Pub. Date Jan. 31, 2019.
Claims priority of application No. 20 2017 104 459.9 (DE), filed on Jul. 26, 2017.
Prior Publication US 2021/0147132 A1, May 20, 2021
Int. Cl. B29C 59/04 (2006.01); B32B 27/00 (2006.01); B65D 75/30 (2006.01); B32B 15/085 (2006.01); B32B 15/20 (2006.01); B32B 27/32 (2006.01)
CPC B65D 75/30 (2013.01) [B32B 15/085 (2013.01); B32B 15/20 (2013.01); B32B 27/32 (2013.01); B32B 2307/538 (2013.01); B32B 2439/40 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A packaging container for free-flowing filling material, the packaging container comprised of a packaging film, wherein the packaging film is a composite film, wherein the packaging container, when filled and closed, forms an envelope of the filling material and comprises two oppositely positioned main walls, wherein the two oppositely positioned main walls serve as support surfaces when the packaging container is stacked in a stack of filled packaging containers, wherein the composite film comprises an inwardly positioned layer of plastic material having a thickness of 70 μm to 150 μm, an outwardly positioned layer consisting of thermoplastic plastic material and having a thickness of 10 μm to 50 μm, a barrier layer and an adhesive layer arranged between the inwardly positioned layer of plastic material and the outwardly positioned layer consisting of thermoplastic plastic material, wherein the barrier layer has a thickness of 6μ to 30 μm, and wherein the adhesive layer has a thickness of 10 μm to 50 μm, wherein the composite film has a total thickness of at least 96 μm, wherein the outwardly positioned layer consisting of thermoplastic material forms an outer surface of the two oppositely positioned main walls, said outer surface comprising an embossment providing a surface roughness of a roughness depth of 20 μm-40 μm, wherein the embossment providing a surface roughness of a roughness depth of 20 μm-40 μm extends across an entire surface of said outer surface.