Plastic bottle preform and method for production thereof
AssigneeSuntory Holdings Limited
InventorsMasanori Nishiyama, Ichiro Tomari, Ryo Yamane, Hideyuki Suzuki
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Abstract
Provided is a PET bottle preform in which delamination is suppressed and a method for the production of the preform. An anchor layer containing a polyester-based urethane resin is formed on an outer surface of the preform.
Claims13
A preform for a plastic bottle comprising a mouth serving as an opening of the plastic bottle, a cylindrical body, and a bottom enclosing the cylindrical body,
- wherein the preform has a coating film in which an anchor layer containing a polyester-based urethane resin is formed on an outer surface of the preform, and
- wherein a barrier layer containing polyvinyl alcohol and a leveling agent is formed on the anchor layer.
A plastic bottle comprising a mouth serving as an opening of the plastic bottle, a cylindrical body, and a bottom enclosing the cylindrical body,
- wherein the plastic bottle has a coating film in which an anchor layer containing a polyester-based urethane resin is formed on an outer surface of the preform, and
- wherein a barrier layer containing polyvinyl alcohol and a leveling agent is formed on the anchor layer.
A method for the production of a preform for a plastic bottle, the method comprising the steps of:
- preparing a preform comprising a mouth serving as an opening of the plastic bottle, a cylindrical body, and a bottom enclosing the cylindrical body, and
- coating an outer surface of the preform with an anchor coating agent containing a polyester-based urethane resin and drying to form an anchor layer, and
- coating the anchor layer with a solution containing polyvinyl alcohol and a leveling agent and drying to form a barrier layer.
Dependencies are inferred from the claim text.