| 摘要 |
<p>A multilayer coextruded thermoplastic film structure comprising:
a) a first layer comprising a polymer sealant material;
b) a second layer comprising a frangible polymer blend;
c) a third layer comprising an adhesive material;
d) a fourth layer comprising a nylon;
e) a fifth layer comprising a material selected from an adhesive material on an oxygen gas barrier material;
f) a sixth layer comprising a nylon;
g) a seventh layer comprising an adhesive material; and
h) an eighth layer comprising a material selected from polyethylene, polypropylene, polyester, nylon or blends and copolymers thereof;
wherein said first layer is coextruded with said second through eighth layers, said first layer comprises from 1% to 10% of the total thickness of said coextruded film structure, said first layer has a thickness uniformity deviation of less than 20% of the average thickness of said first layer; said second layer has a maximum thickness of 12.7¼m (0.5 mils.);
and said multilayer film structure has a peel strength of less than 0.77N per mm (2000 grams per inch) as measured in accordance with ASTM F-904 test method when peeled from a second film structure to which said multilayer film structure has been heat-sealed.</p> |
