Transfer label
A transfer label comprises a support layer ( 1 ), further an overprint layer ( 5 ) detachably affixed by adhesive to the support layer ( 1 ) and affixable to an object, and a protective film ( 3 ) mounted between the support layer ( 1 ) and the overprint layer ( 5 ) and detachable from the support layer ( 1 ). The protective film is substantially non-plasticizing and directly adheres to the support layer ( 1 ) but is detachable from the label substantially independently of label temperature and is a thoroughly polymerized material.
1. A transfer label comprising:
a support layer,
an overprint layer disposed in a detachable manner to the support layer and affixable to an object by means of an adhesive, and
a protective layer disposed between the support layer and the overprint layers,
wherein said protective layer
is detachably disposed on the support layer,
directly adheres to the support layer via physical adhesion,
is substantially detachable from the support layer
independent of the label's temperature,
has the property of forming a protective film,
is thoroughly polymerized and essentially non-plasticizable,
is an UV cured varnish, and
wherein said support layer, at least on the side facing the protective layer is made of unpretreated polypropylene or unpretreated polyethylene.
2. The transfer label of claim 1 , wherein the protective film is formed from a UV varnish cationically cold-crosslinking under irradiation.
3. The transfer label of claim 2 , wherein the overprint layer is formed from a solvent-containing varnish.
4. The transfer label of claim 1 , wherein at least one overprint layer adheres to the protective film by means of a prime layer and wherein the primer layer has at least one adhesion-inducing partial layer and a barrier layer preventing migration of solvents into the protective film.
5. The transfer label of claim 1 , wherein the protective film is stretchable.
6. The transfer label of claim 5 , wherein the protective film has a stretchability in the range of 50-400%.
7. The transfer label of claim 5 , wherein the protective film has a stretchability in the range of 100-300%.
8. The transfer label of claim 5 , wherein the protective film has a stretchability in the range of 150-250%.
9. The transfer label of claim 5 , wherein the protective film has a stretchability in the range of 200%.
10. The transfer label of claim 1 , wherein the protective film has a base composition containing acrylic acid based polymers.
11. The transfer label of claim 10 , wherein the protective film has a composition of approximately 40% polyurethane-acrylate polymer mixture, 20% monofunctional octyl-decyl acrylate and 35% tripropylene glycol diacetate and a rest of additives.
12. The transfer label of claim 1 , wherein the respective stretchabilities of the label layers to be transferred decrease from the side of the adhesion to the side of the protective layer.
13. The transfer label of claim 1 , wherein the stretchability of the support layer is less than the stretchability of the label layers to be transferred.