"método de moldagem por compressão de um fechamento plástico de material polimérico espumado"

• Main Authors: JEFFREY M. PRISTERA, EDWARD KRESGE, JOHN ERSPAMER, LAWRENCE M. SMEYAK, HUGH MORTON, LINDSEY ABNEY, NAVANEETH BASHYAM, BRANDON HUGHES
• Format: Patent
• Language: Portuguese
• Published: 05.04.2016
• 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

A method of compression molding a plastic article, such as a closure, includes providing a molten polymeric material, comprising a mixture of at least one molten polymer and a gas blended therein. The polymeric material is molded between cooperating male and female molds, with relative movement of t...