Multilayer films that include at least five layers and methods of producing the same

US11969976B2 · kind B2 · utility

Assignees

• DOW GLOBAL TECHNOLOGIES LLC · US
• Dow Quimica De Colombia S.A. · CO

Inventors

• Jorge Mario Rodriguez Camelo · Bogota, CO
• Marlos Guintini de Oliveira · São Paulo, BR
• Nicolas Cardoso Mazzola · São Paulo, BR
• Sanjib Biswas · Midland, US
• Joshua B. Gaubert · Pearland, US
• Douglas S. Ginger · Houston, US
• Mridula Kapur · Lake Jackson, US
• Didem Oner-Deliormanli · Bellaire, US
• Mehmet Demirors · Terneuzen, NL

Key dates

• Filing date: Aug 4, 2020
• Grant date: Apr 30, 2024
• Expiry date: Mar 26, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2439/70
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Embodiments of the present disclosure are directed to multilayer films. Embodiments of the multilayer films may include a first layer comprising a first polyolefin, a second layer comprising a second polyolefin, a third layer comprising a third polyolefin, fourth layer comprising a fourth polyolefin, and a fifth layer comprising a fifth polyolefin. The second layer may be positioned between the first layer and the third layer; the third layer may be positioned between the second layer and the fourth layer; and the fourth layer may be positioned between the third layer and the fifth layer. Two or more of the first polyolefin, second polyolefin, third polyolefin, and fourth polyolefin may be the same or different. The third polyolefin may be a polyethylene composition having a density of 0.924 g/cm3 to 0.936 g/cm3 and a melt index (I2) of 0.25 g/10 minutes to 2.0 g/10 minutes.