COEXTRUDED MULTILAYER PLASTIC BLOW MOLDED CONTAINER

摘要

A plastic blow molded container (10) including a coextruded blow molding (12 ) has a wall (22) including: (a) an inner lay- er (26) of a virgin plastic; (b) an inner intermediate layer (28) of recycle d plastic which is relatively dark; (c) an outer intermediate layer (30) of an opaque plastic that visually hides the dark recycled plasti c; and (d) an outer layer (32) of a pigmented plastic of a lighter color which is not visually distorted by the darker inner intermedia te layer (28) of recycled plastic due to the opaqueness of the outer intermediate layer (30). Titanium dioxide is preferably utilized t o provide the opaqueness of the outer intermediate layer (30) whose plastic may be either virgin or recycled. The inner layer (26) of virgin plastic, the outer intermediate layer (30) of opaque plastic and the outer layer (32) of pigmented plastic each has a thickness that is at least about 0.1 of the total thickness of the wall, and the inner intermediate layer (28) of recycled plastic normally will have a thickness on the order of about 0.55 to 0.65 of the total thickness of the wall. The construction of the container has particular utility when the wall (22) including each of its layers is made of high density polyethylene.