Recyclable packaging film with dimensional stability
Recyclable and dimensionally stable films for packaging include an oriented base film having a first layer containing a polar polymer and a second layer containing a stabilizing polyolefin, wherein the stabilizing polyolefin is selected from the group of an ethylene/norbornene copolymer having a norbornene content greater than 20 mol %, a polyethylene polymer having a density greater than 0.94 g/cm 3 , and a polypropylene homopolymer.
1 . A recyclable film comprising:
an oriented base film comprising a first layer comprising a first polar polymer and a second layer comprising a stabilizing polyolefin,
wherein the stabilizing polyolefin is selected from the group of an ethylene/norbornene copolymer having a norbornene content greater than 20 mol %, a polyethylene polymer having a density greater than 0.94 g/cm 3 , and a polypropylene homopolymer, and
wherein the oriented base film has a converting related strain value from 0% to 0.75%, at a temperature of 75° C. under a load of 80 N/m.
2 . The recyclable film of claim 1 , wherein the first layer comprises a composition including from 50% to 100% of the first polar polymer, by weight, and the first polar polymer is a polyamide, a polyester or an ethylene vinyl alcohol copolymer (EVOH).
3 . The recyclable film of claim 2 , wherein the first polar polymer is polyamide 6/66.
4 . The recyclable film of claim 1 , wherein the first layer of the oriented base film is a first outer layer of the oriented base film.
5 . The recyclable film of claim 4 , wherein the first layer of the oriented base film is a first outer layer of the recyclable film.
6 . The recyclable film of claim 1 , further comprising a sealing layer, wherein the first layer of the oriented base film is a first outer layer of the recyclable film and the sealing layer is a second outer layer of the recyclable film.
7 . The recyclable film of claim 6 , wherein the sealing layer is not oriented.
8 . The recyclable film of claim 1 , wherein the oriented base film has a free shrink value of less than 5% in both the machine direction and the transverse direction when tested according to ASTM D2732 using bath temperature of 90° C.
9 . The recyclable film of claim 1 , wherein the oriented base film further comprises a third layer comprising a second polar polymer, wherein the second layer is between the first layer and the third layer.
10 . The recyclable film of claim 9 , wherein the first layer is a first outer layer of the oriented base film and the third layer is a second outer layer of the oriented base film.
11 . The recyclable film of claim 1 , comprising a total composition, wherein the total composition comprises not more than 20% polar polymer, by weight.
12 . The recyclable film of claim 1 , further comprising printed indicia located on a major surface of the oriented base film.
13 . The recyclable film of claim 6 , further comprising a barrier layer comprising a barrier material, the barrier layer located between the first layer and the sealing layer.
14 . The recyclable film of claim 1 , wherein the recyclable film consists of the oriented base film, the oriented base film comprises a sealing layer and the sealing layer is an outer layer of the oriented base film.