Multilayer structures having annular profiles and methods and apparatus of making same

• Main Authors: ROBACKI JEFF M, BARGER MARK A, DOOLEY JOSEPH, WRISLEY ROBERT E, CRABTREE SAM L, PAVLICEK CALVIN L
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2014
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Disclosed are multilayer film structures having annular profiles, and methods and apparatus of making the structures disclosed. The annular multilayer articles have a uniform thickness, at least four layers and comprise overlapped and non-overlapped circumferential areas; wherein the layer structure...