PROCESS FOR PRODUCING MULTILAYER FILM

A process for producing a film is provided and includes extruding a multilayer film with a core component comprising from 15 to 1000 alternating layers of layer A material and layer B material. The layer A material has a crystallization temperature, T1c. The process includes passing the multilayer f...

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Bibliographic Details
Main Authors KIRKPATRICK, Donald, E, DOOLEY, Joseph, WRISLEY, Robert, E, LEE, Patrick Chang Dong, JENKINS, Steven, R
Format Patent
LanguageEnglish
French
German
Published 07.08.2019
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
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Summary:A process for producing a film is provided and includes extruding a multilayer film with a core component comprising from 15 to 1000 alternating layers of layer A material and layer B material. The layer A material has a crystallization temperature, T1c. The process includes passing the multilayer film across an air gap having a length from 10 mm to 800 mm. The process includes moving the multilayer film across a roller at a rate from 20 kg/hr to 1000 kg/hr. The process includes maintaining the roller at a temperature from T1c-30° C. to T1c, and forming a multilayer film with a layer A having a thickness from 50 nm to 500 nm and an effective moisture permeability from 0.77 to 2.33 g-mil/m2/24 hrs.
Bibliography:Application Number: EP20150728323