Patent · US Active

Method for producing a multi-layer plastic film

US9156228B2 · kind B2 · utility

5Cited by

7References

4Claims

0Family size

Assignee

Benecke-Kaliko AG · DE

Inventors

Juergen Buehring · Stuttgart, DE
Thomas Malner · Eppingen, DE
Joseph Mani · Eislingen/Fils, DE
Volker Huelsewede · Schlat, DE

Key dates

Filing date	Jun 18, 2013
Grant date	Oct 13, 2015
Priority date	—
Expiry date	Sep 3, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/249953
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A method for producing a multi-layer plastic film comprising at least one compact cover layer and at least one layer which is arranged under the cover layer and made of extruded foamed plastic (foam layer), wherein the compact cover layer is connected to the foam layer thermally or by adhesion after extrusion and cooling of the foam layer to below the melting temperature. The layer made of foamed plastic is generated by blowing a propellent which is under positive pressure into a plastic melt during the extrusion process and by subsequently relaxing the propellent which is under positive pressure, wherein the foamed plastic is at first not cross-linked and is cross-linked together with the compact cover layer, in particular by high-energy radiation, only after the foam layer and the compact cover layer have been connected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.