Patent ID: 8551592
Filing Date: 2013-10-08
Classification: B29B,B29C,B29K,Y10T

Abstract:
1. A two-layered preform obtained by injection overmolding, comprising a tubular body with a neck providing a mouth at a first end thereof and a closed bottom at an opposite second end, at least part of said tubular body being formed by a first layer made of a primary molding material and a second layer made of an overmolding material, wherein: said first layer is an inner layer providing a barrier effect against light by absorption; said second layer is an outer layer providing a barrier effect against light by reflection; both said primary molding material of the first layer and said overmolding material of the second layer comprise a synthetic polymer mixed with one or more coloring agents; said synthetic polymer and at least one of said coloring agents are common to both the primary molding material of the first layer and the overmolding material of the second layer; another of said coloring agents is only present in the primary molding material of the first layer; and said neck is formed with said overmolding material of the second layer not coated by the primary molding material of the first layer.