In-mould labelling
AssigneeInnovia Films Limited
InventorsStephen Langstaff, Steven Maude, Andrzej Kornacki
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Abstract
There is disclosed a method of manufacturing an in-mold labelled article, the method comprising the steps of: placing a label comprising a film having a core comprising polypropylene/polyethylene random copolymer as its principal polymeric constituent into a mold for injection molding, thermoforming, or blow molding; holding the label in position; injecting a polymeric melt into, or thermoforming or blowing a polymeric preform in said mold so as to bind with the label; and removing the article from the mold. A process of in-mold labelling using such a label is also disclosed.
Claims21
A process for in-mould labelling of an article with a polymeric film, comprising:
- forming a label on an article with a polymeric film, wherein the polymeric film comprises at least a core layer comprising a random copolymer of polypropylene and polyethylene, which polymeric film shrinks on application of heat and exhibits a maximum shrink force during residual shrinkage immediately after the application of the heat of not more than 500 cN.
A process for labeling an article, comprising the steps of:
- placing into a mould for injection moulding, thermoforming, or blow moulding, a polymeric film label wherein the polymeric film label comprises at least a core layer comprising a random copolymer of polypropylene and polyethylene, which film label shrinks on application of heat and exhibits a maximum shrink force during residual shrinkage immediately after the application of the heat of not more than 500 cN;
- holding the polymeric film label in position;
- injecting a polymeric melt into, or thermoforming or blowing a polymeric preform in said mould so as to bind with the polymeric film label;
- and
- removing the article from the mould.
A process for in-mould labelling of an article with a polymeric film, comprising:
- forming a label on an article with a polymeric film, wherein the polymeric film comprises at least a core layer comprising a random copolymer of polypropylene and polyethylene, which polymeric film shrinks on application of heat and exhibits a maximum shrink force during residual shrinkage immediately after the application of the heat of not more than 500 cN,
- wherein the polymeric film exhibits a dynamic storage modulus, measured at 3 Hz and 25° C. from about 600 to about 3000 MPa measured in a transverse direction or from about 1300 to about 3000 MPa measured in a machine direction, or
- wherein the polymeric film exhibits a dynamic loss modulus, measured at 3 Hz and 250 C. from about 20 MPa to about 150 MPa in the transverse direction or from about 70 MPa to about 150 MPa in the machine direction.
Dependencies are inferred from the claim text.