Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1997-06-02
1998-12-22
Evans, Elizabeth
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428204, 4284111, 4284884, 428913, 428914, 427212, B32D 300
Patent
active
058516395
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a light-transmitting, for instance transparent, cover foil intended for adhesion to an optionally information-carrying surface.
BACKGROUND OF THE INVENTION
A light-transmitting foil for adhesion to an optionally information-carrying surface is known. This known foil comprises a first layer of polyester and a pressure-sensitive or heat-activated glue layer connected thereto.
It is an object of the invention to embody a cover foil such that it can offer a combination of two aspects, that is, a first layer provided with a structure and a heat-activated glue layer. The existing structure may not be adversely affected when the glue layer is activated.
The described, known foil does not meet these requirements.
It is therefore an object of the invention to provide a light-transmitting cover foil which has a structure, for instance a texture and/or a pattern pressed out of its main surface, while provisions are also present to adhere the foil to a surface for covering using simple means and without adversely affecting the existing structure.
SUMMARY OF THE INVENTION
In respect of the above the invention provides a light-transmitting cover foil intended to be arranged adheringly to a surface, for instance the surface of a carrier plate, optionally bearing information such as letters, numbers, images or the like, which foil consists of a laminate comprising of:
a first layer plastically deformable only at a relatively high first temperature, for instance in the range of 120.degree. C.-200.degree. C. and comprising for instance polycarbonate, PMMA, PVC, ABS, PP, PE, which first layer is provided before, during or after joining together to the other layers with a structure, for instance a texture and/or a pattern pressed out of its main surface by exerting pressure and increasing temperature to at least the first temperature, for instance by applying a heated profile roller;
a second layer adhered thereto consisting of a dimensionally stable carrier layer comprising for instance polycarbonate, PMMA, PVC, polyester/PET, ABS; and
a third layer adhered thereto which is meltable and thus heat-activated at a relatively low second temperature, for instance in the range of 50.degree. C.-90.degree. C. and which consists of a hot-melt layer or glue layer, comprising for instance EVA, EEA, EBA, EMA, GBA or other low-melting plastics including polyolefins and copolymer esters, polyacetate esters, softened PVCs;
which layers are mutually connected by adhesive agents, for instance by making use of co-extrusion.
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes a foil having a laminate including:
a first layer plastically deformable only at a relatively high first temperature, for instance in the range of 120.degree. C.-200.degree. C. and comprising for instance polycarbonate, PMMA, PVC, ABS, PP, PE, which first layer is provided before, during or after joining together to the other layers with a structure, for instance a texture and/or a pattern pressed out of its main surface by exerting pressure and increasing temperature to at least the first temperature, for instance by applying a heated profile roller;
a second layer adhered thereto consisting of a dimensionally stable carrier layer comprising for instance polycarbonate, PMMA, PVC, polyester/PET, ABS; and
a third layer adhered thereto which is meltable and thus heat-activated at a relatively low second temperature, for instance in the range of 50.degree. C.-90.degree. C. and which consists of a hot-melt layer or glue layer, comprising for instance EVA, EEA, EBA, EMA, GBA or other low-melting plastics including polyolefins and copolymer esters, polyacetate esters, softened PVCs;
which layers are mutually connected by adhesive agents, for instance by making use of co-extrusion.
Attention is drawn to the fact that polyester/PET is excluded as material for the first layer.
The invention is based on the insight that the structuring of the first layer can take place in advance and that due to the relative
REFERENCES:
patent: 4063641 (1977-12-01), Kuehn
Evans Elizabeth
Sallmetall B.V.
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