CONTAINER CONSTRUCTIONS
A container, according to various embodiments of the invention, includes a co-extruded, blow molded wall that comprises: (1) a first, inner surface layer, (2) a second, interior layer; and (3) a third layer. In one embodiment, the inner surface layer comprises an extrusion blow-molding-capable grade of PET; the second, interior layer comprises adhesive; and the third layer comprises a polyolefin and the regrind material from one or more containers similar to the blow molded container. In various embodiments, the third layer is an outer surface layer of the blow molded wall. Alternatively, the container may further comprise a fourth (e.g., exterior surface) layer that comprises a polyolefin. In other embodiments, the inner surface layer comprises an extrusion blow-molding-capable grade of PET; the second, interior layer comprises a barrier material, such as polyamide resin, EVOH, or a compatible oxygen scavenger; and the third layer comprises an extrusion blow-molding-capable grade of PET.
1 . A blow molded container comprising a wall, said wall comprising:
a first layer comprising an extrusion blow-molding-capable grade of PET, said first layer being an inner surface layer of said wall;
a second, interior layer, said second layer comprising about 0.2% to about 10% of the total weight of the extruded wall of the container and an oxygen scavenger additive; and
a third layer comprising an extrusion blow-molding-capable grade of PET, wherein said second layer is disposed between said first and third layers.
2 . The blow molded container of claim 1 , wherein said third layer is an outer surface layer of said wall.
3 . The blow molded container of claim 1 , wherein:
said first layer engages an inner side of said second layer; and
said third layer engages an outer side of said second layer.
4 . The blow molded container of claim 3 , wherein said third layer is an exterior surface layer of said wall.
5 . The blow molded container of claim 3 , wherein said first layer consists essentially of an extrusion blow-molding-capable grade of PET.
6 . The blow molded container of claim 5 , wherein said third layer consists essentially of an extrusion blow-molding-capable grade of PET.
7 . The blow molded container of claim 6 , wherein said second layer consists essentially of said adhesive material.
8 . The blow molded container of claim 1 , wherein said third layer consists essentially of regrind material from one or more containers having a composition similar to that of said blow molded container.
9 . The blow molded container of claim 1 , wherein said second layer consists essentially of a material selected from the group consisting of: polyamide resins and EVOH.
10 . The blow molded container of claim 1 , wherein said second layer comprises polyamide resin.
11 . The blow molded container of claim 10 , wherein said second layer consists essentially of polyamide resin.
12 . The blow molded container of claim 11 , wherein said first layer consists essentially of an extrusion blow-molding-capable grade of PET.
13 . The blow molded container of claim 11 , wherein said third layer consists essentially of an extrusion blow-molding-capable grade of PET.
14 . The blow molded container of claim 13 , wherein said third layer is an exterior layer of said wall.
15 . The blow molded container of claim 1 , wherein said second layer comprises EVOH.
16 . The blow molded container of claim 15 , wherein said second layer consists essentially of EVOH.
17 . The blow molded container of claim 16 , wherein said first layer consists essentially of an extrusion blow-molding-capable grade of PET.
18 . The blow molded container of claim 17 , wherein said third layer consists essentially of an extrusion blow-molding-capable grade of PET.
19 . The blow molded container of claim 18 , wherein said third layer is an exterior layer of said wall.
20 . The blow molded container of claim 1 , wherein said second layer comprises a material selected from a group consisting of: polyamide resin, EVOH, and cycloolefins
21 . The blow molded container of claim 20 , wherein said second layer comprises at least one cycloolefin.
22 . The blow molded container of claim 21 , wherein said second layer consists essentially of at least one cycloolefin.
23 . The blow molded container of claim 1 , wherein said second layer comprises at least one unsaturated polyolefin.
24 . The blow molded container of claim 23 , wherein said second layer consists essentially of at least one unsaturated polyolefin.
25 . The blow molded container of claim 1 , wherein said blow molded container comprises a body portion that consists essentially of said first, second, and third layers.
26 . The blow molded container of claim 1 , wherein said first layer comprises about 2% to about 10% of the total weight of the container.
27 . The blow molded container of claim 26 , wherein said first layer comprises about 4% to about 10% of the total weight of the container.
28 . The blow molded container of claim 26 , wherein said first layer comprises about 5% of the total weight of the container.
29 . A blow molded container comprising:
a co-extruded, multi-layer, blow molded wall comprising at least one layer that comprises about 0.2% to about 10% of the total weight of the extruded wall of the container and a blend of:
(A) an extrusion-blow-molding-capable grade of PET;
(B) at least one barrier material; and
(C) regrind from at least a particular multi-layer container, said particular multi-layer container comprising at least one layer of an extrusion-blow-molding-capable grade of PET.
30 . The blow molded container of claim 29 , wherein:
said co-extruded, multi-layer, blow molded wall is a first co-extruded, multi-layer, blow molded wall; and
said particular multi-layer container comprises a second co-extruded, multi-layer, blow molded wall.
31 . The blow molded container of claim 30 , wherein said barrier material is selected from a group consisting of: (A) polyamide resin; (B) EVOH; and (C) one or more PET-compatible oxygen scavengers.
32 . The blow molded container of claim 31 , wherein said regrind comprises regrind from a multilayer extrusion-blow-molding-capable PET extrusion process.
33 . The blow molded container of claim 32 , wherein said barrier material comprises polyamide resin.
34 . The blow molded container of claim 31 , wherein said barrier material comprises EVOH.
35 . The blow molded container of claim 31 , wherein said barrier material comprises one or more PET-compatible oxygen scavengers.
36 . A blow molded container comprising a wall, said wall comprising:
a first layer comprising an extrusion blow-molding-capable grade of PET, said first layer being an inner surface layer of said wall;
a second, interior layer, said second layer comprising about 0.2% to about 10% of the total weight of the extruded wall of the container and consists essentially of a material selected from the group consisting of: polyamide resins and EVOH; and
a third layer comprising an extrusion blow-molding-capable grade of PET, wherein said second layer is disposed between said first and third layers.
37 . The blow molded container of claim 1 , wherein said second layer comprises about 0.5% to about 3% of the total weight of the extruded wall of the container.
38 . The blow molded container of claim 29 , wherein said layer comprises about 0.5% to about 3% of the total weight of the extruded wall of the container.
39 . The blow molded container of claim 36 , wherein said second layer comprises about 0.5% to about 3% of the total weight of the extruded wall of the container.