Adhesive packaging tape
AssigneeTesa SE
InventorsWolfgang David, Stefan Rober
Life of this patent
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Abstract
A solvent-free adhesive tape with a film based on polyolefins and an adhesive layer which is applied at between 10 and 45 g/m2 and is prepared with a mixture comprising an adhesive acrylic dispersion acquires improved adhesive properties and increased water insensitivity by virtue of the fact that the mixture comprises a second, special acrylic dispersion, the quantitative ratio between the first acrylic dispersion and the second acrylic dispersion being between 99:1 and 90:10 and the second acrylic dispersion comprising the following components: 65-84% by weight of ethyl acrylate units 15-34% by weight of methyl methacrylate units 0.5-2% by weight of acrylic acid units 0.1-1% by weight of propyleneimine units.
Claims11
A solvent-free adhesive tape comprising a polyolefin film with from 10 to 45 g/m2 of an adhesive coating formed from a mixture of
- a) an adhesive acrylic dispersion A and
- b) an acrylic dispersion B comprising:
- 65-84% by weight of ethyl acrylate units
- 15-34% by weight of methyl methacrylate units
- 0.5-2% by weight of acrylic acid units, and
- 0.1-1% by weight of propyleneimine units,
- the quantitative ratio between adhesive acrylic dispersion A and acrylic dispersion B in said mixture being between 99:1 and 90:10, said mixture further comprising from 0-30% by weight of additives which do not alter the adhesive properties of the adhesive coating.
8 The solvent-free adhesive tape of claim 1 comprising a printing applied to the surface thereof in the absence of surface activation.
A solvent-free adhesive tape comprising a polyolefin film coated with an acrylic adhesive composition comprised of a polymer A having 0.5 to 3% acrylic acid units and 99.5 to 90% n-butyl acrylate units and a polymer B having 65-84% by weight of ethyl acrylate units, 5-34% by weight of methyl methacrylate units, 0.5-2% by weight of acrylic acid units, and 0.1-1% by weight of propyleneimine units, the weight ratio of polymer A to polymer B in said adhesive composition being between 99:1 and 90:10.
A solvent-free adhesive tape comprising a polyolefin film coated with an acrylic adhesive composition comprised of a polymer A having 80 to 90% of 2-ethylhexyl acrylate acid units and 8 to 20% n-butyl acrylate units and a polymer B having 65-84% by weight of ethyl acrylate units, 5-34% by weight of methyl methacrylate units, 0.5-2% by weight of acrylic acid units, and 0.1-1% by weight of propyleneimine units, the weight ratio of polymer A to polymer B in said adhesive composition being between 99:1 and 90:10.
Dependencies are inferred from the claim text.