Method for gluing plastic labels on hydrorepellents containers by means of labelling apparatus for water based glues
AssigneeGrafiche Rekord S.R.L.
InventorLuciano Croci
Life of this patent
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Abstract
Method for gluing plastic labels (15) formed of a film (12) of BI-oriented polypropylene covered on each from a layer of acrylic material (13, 14), to hydrorepellent containers by using application apparatus for water based glue paper labels; one of layers (13, 14) is printed by means of inks (16) for non absorbing materials, covered by a layer of overprinting paint (17).
Claims3
Method for gluing polypropylene labels covered on the side to be glued of a layer of acrylic material (13), to hydrorepellent containers by using application apparatus for water based glue paper labels characterised in that said method comprises in combination the operation of substitution of the paper labels reservoir with a plastic labels reservoir (15), said plastic labels being formed of a film (12) of BI-oriented polypropylene;
- said film (12) being covered on the other face by a second layer of acrylic material (14);
- one of said layers (13,14) of said acrylic material being printed by means of inks (16) for non absorbing materials, said inks (16) containing additives of oxidising compound salts;
- said printed layer being covered by a layer of overprinting paint (17), the overprinting paint being receptive of water based glues:
- and th operation of substitution of the reservoir of water based glues for paper of said apparatus with a reservoir containing water resin based glue, containing a terpolymer, having a viscosity of (70,000±10,000) mPas, a pH of 5.5±1.5 and a dry residual of (46±3)%.
Method according to the preceding claim cbaracterised in that said plastic label (15) is opaque and the ink printing is effected on the outer face opposed to the face to be glued to said hydrorepellent container and said printed layer being covered by a layer of overprinting paint (17).
Method according to claim characterised in that said plastic label (15) is transparent and the ink printing (16) is effected on the inner face to be glued to said hydrorepellent container or on the outer face opposed to the face to be glued to said container and said printed layer being covered by a layer of overprinting paint (17).
Dependencies are inferred from the claim text.