Plastic container having a high resistance to chemical attack and method of making same

US6068900A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Udo Kohn · Darmstadt, DE
• Franz Steigerwald · Griesheim, DE

Key dates

• Filing date: Feb 27, 1998
• Grant date: May 30, 2000
• Expiry date: Feb 27, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/28
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A plastic container has a high resistance to chemical attack and is made by a method including extruding and inflating a tube in a single operation by a coextrusion blow molding process to form a hollow plastic body. The tube consists of an outer layer made of glycol-modified polyethylene terephthalate (PETG) and an inner layer made of polyethylene terephthalate (PET), polyethylene naphthalate (PEN) or a mixture thereof. Selection of the foregoing materials and layers allows the plastic body for the container to be made in a single operation by coextrusion blow molding.