US 9,895,865 B2Granted

Polymer film for in-mould labelling

AssigneeTreofan Germany GmbH & Co. KG

InventorYvonne Düpre

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Abstract

The invention relates to a multi-layered, opaque, biaxially-oriented polyolefin film with a thickness of less than 150 mum and which comprises f. a base layer that contains vacuoles and at least one polymer of at least one olefin, g. an inner intermediate layer that contains at least one polymer of at least one olefin, h. an outer intermediate layer that contains at least one polymer of at least one olefin, i. an inner cover layer which is in contact with the inner intermediate layer and contains 5-70 wt. % of at least one polyethylene and 30-95 wt. % of at least one propylene polymer, and j. an outer cover layer which is in contact with the outer intermediate layer and contains 5-70 wt. % of at least one polyethylene and 30-95% of at least one propylene polymer, each amount indication relating to the weight of the layer in question, and characterized in that said outer intermediate layer has a thickness of 0.5 to 5 mum and contains 4.5 to 30 wt. % of pigments, preferably Tau[Iota]Omicron2, in that the outer cover layer has a thickness of >0 to <2 mum, and in that the film has a gloss on either side of less than 50 gloss units measured according to DIN EN ISO 2813 at an angle of 60 DEG and at a temperature of 25 DEG C.

Claims20

Dependent claims

An in-mould labelling method which comprises placing at least one printed label in a mold wherein the label is made from a multi-layered, opaque, biaxially oriented polyolefin film with a thickness of less than 150 μm, comprising

a. a vacuole-containing base layer containing at least one polymer of at least one olefin,
b. an inner intermediate layer containing at least one polymer of at least one olefin,
c. an outer intermediate layer containing at least one polymer of at least one olefin,
d. an inner cover layer, which is in contact with the inner intermediate layer and which contains 5-70% by weight of at least one polyethylene and 30-95% by weight of at least one propylene polymer, and
e. an outer cover layer, which is in contact with the outer intermediate layer and which contains 5-70% by weight of at least one polyethylene and 30-95% by weight of at least one propylene polymer,
wherein the specified quantities relate to the weight of the respective layer, wherein
the outer intermediate layer has a thickness from 0.5 to 5 μm and contains 4.5 to 30% by weight of a pigment, and
the outer cover layer has a thickness from >0 to <2 μm and the film on both sides has a gloss of less than 50 gloss units measured in accordance with DIN EN ISO 2813 at an angle of 60° and at a temperature of 25° C.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/413,567Filed 10 Jul 2013
Priority: EP 1200512611 Jul 2012
Published: US 2015/0165734 A118 Jun 2015
Granted: 20 Feb 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification35 codes

B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B29C 48/18
Articles comprising two or more components, e.g. co-extruded layers: the components being layers
B29C 49/04
Combined blow-moulding and manufacture of the preform or the parison: extrusion blow-moulding
B29C 49/2408
Lining or labelling: in-mould lining or labelling