Search International and National Patent Collections

1. (WO2018126309) DEVICE AND METHOD FOR THE MAKING OF POLYMERIC FILMS WITH CONTROLLED THICKNESS, AND POLYMERIC FILMS THEREOF

Pub. No.:    WO/2018/126309    International Application No.:    PCT/CA2017/051609
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Sat Dec 30 00:59:59 CET 2017
IPC: B65D 65/40
B29C 49/64
Applicants: SOLMAX INTERNATIONAL INC.
Inventors: ST. PIERRE, Simon Gilbert
TAGHIZADEH, Ata
Title: DEVICE AND METHOD FOR THE MAKING OF POLYMERIC FILMS WITH CONTROLLED THICKNESS, AND POLYMERIC FILMS THEREOF
Abstract:
Described herein are polyethylene geomembrane liners having a peripheral longitudinal welding edge. The thickness of the any longitudinal strip at desired position is controlled with a method and a device in contact with the molten polymer that provides rapid cooling. This thickened strip can be in the peripheral longitudinal edges. The apparatus is positioned above the die of a blown film extrusion line and before the solidification point of molten polymer. The device and method of using it described herein can be used to control the thickness of any type of plastic films in blown film process to improve physical mechanical properties at some parts of the films or simply in the full width of the film.