METHOD OF MAKING A CONTAINER WITH CRYSTALLIZED INNER SURFACE

摘要

A refillable plastic bottle (10) with low permeability and absorption to certain polar and non-polar substances is produced by a number of methods. The low permeability and absorption are achieved by providing an inner surface (14) of the bottle (10) with a crystallinity exceeding 30 %, in combination with treatment to achieve low residual stress on the inner surface (14). The crystallinity is achieved by either: applying heated fluid to the inner surface of the bottle or the preform used to form the bottle; coating the inner surface of either the bottle or preform with highly crystalline material; coating a core rod with highly crystalline material; or coating the inner surface of the preform with a temperature increasing substance. The refillable plastic bottles (10) with crystallized inner surfaces (14) can be manufactured on any orientable resin or resin blend.