Multilayer plastic container and method of making the same
AssigneePechiney Emballage Flexible Europe
InventorsA. B. M. Bazlur Rashid, Kevin James Curie, Patrick Carl Bushman, Michael Lewis Wampler
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Abstract
The multilayer plastic container comprises a neck portion, a body portion, adjacent the neck portion, forming a cylindrical wall, and a bottom portion adjacent the body portion and opposite the neck portion. The cylindrical wall comprises a first layer of PET, a layer of EVOH adjacent the first layer of PET and a second layer of PET adjacent the layer of EVOH. The EVOH has an average thickness which is greater near the neck portion of the container than near the bottom portion of the container.
Claims44
A method of making a multilayer plastic container comprising the steps of:
- a) providing a multilayer preform having a top portion, a neck portion extending from the top portion, a body portion extending from the neck portion opposite the top portion, and a bottom portion closing the body portion, wherein at least the body portion of the preform has a first layer, a intermediate layer adjacent to the first layer and a second layer adjacent to the intermediate layer, wherein an average thickness of the intermediate layer in the body portion of the preform is greater near the neck portion of the preform than near the bottom portion and, in the body portion, the intermediate layer extends substantially parallel to the body portion;
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- b) blow molding the preform to form the container.
A method of making a multilayer plastic container comprising a neck portion, a body portion extending from the neck portion, and a bottom portion extending from the body portion opposite the neck portion, at least the body portion comprising an inner layer, an outer layer and an intermediate layer between the inner layer and the outer layer, and an average thickness of the intermediate layer in the body portion is greater near the neck portion than near the bottom portion and, in the body portion, the intermediate layer extends substantially parallel to the body portion, said method comprising the steps of:
- a) providing a multilayer preform having a neck portion, a body portion extending from the neck portion, and a bottom portion extending from the body portion opposite the neck portion, at least the preform body portion comprising an inner layer, an outer layer and an intermediate layer between the inner layer and the outer layer;
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- b) blow molding the preform to form the container.
A method of making a multilayer plastic container comprising a neck portion, a body portion extending from the neck portion, and a bottom portion extending from the body portion opposite the neck portion, at least the body portion comprises an inner layer comprising PET, an outer layer comprising PET and an intermediate layer, comprising an oxygen barrier material, between the inner layer and the outer layer, an average thickness of the intermediate layer in the body portion being greater near the neck portion than near the bottom portion and, in the body portion, the intermediate layer extends substantially parallel to the body portion, said method comprising the steps of:
- a) providing a multilayer preform having a neck portion, a body portion extending from the neck portion and a bottom portion extending from the body portion opposite the neck portion, at least the preform body portion comprised of an inner layer comprising PET, an outer layer comprising PET and an intermediate layer, comprising an oxygen barrier material, between the inner layer and the outer layer;
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- b) blow molding the preform to form the container.
Dependencies are inferred from the claim text.