Label laminate and novel paper substrate therefor
AssigneeAvery Dennison Corporation
InventorScott Mingus
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Abstract
The release liner of a paper label laminate is made with a porous, inexpensive, low weight paper substrate. The paper substrate is selected to substantially match the label facestock in terms of hysterisis curves. In addition, chemical techniques rather than supercalendering or heavy clay coating are relied on for achieving the desired silicone holdout and silicone cure properties of the paper substrate.
Claims15
A label laminate comprising a release liner and a label layer thereon, said label layer comprising a paper facestock and an adhesive bonding said facestock to said release liner, said release liner comprising a paper substrate and a layer of a release agent between said substrate and said adhesive, the slope of the Neenah Hygroexpansivity hysterisis curve of the paper forming said substrate substantially matching the slope of the Neenah Hygroexpansivity hysterisis curve of the paper forming said facestock, the paper forming said substrate having a basis weight of 50 pounds per 3000 ft.sup.2 ream or less,
- wherein the paper forming said substrate has an IGT Silicone Demand at 40 kg of <6 cm.sup.3 /cm.sup.2 and a Heat Stability of <0.5%, the cured silicone coating of said release liner exhibiting a Percent Silicone Extractables of <10%.
A label laminate comprising a release liner and a label layer thereon, said label layer comprising a paper facestock and an adhesive bonding said facestock to said release liner, said release liner comprising a paper substrate and a layer of a release agent between said substrate and said adhesive, wherein the slope of the lower portion of the Neenah Hygroexpansivity hysterisis curve of the paper forming said substrate within 5% of the slope of the lower portion of the Neenah Hygroexpansivity hysterisis curve of the paper forming said facestock, the paper forming said substrate having a basis weight of 50 pounds per 3000 ft.sup.2 ream or less,
- wherein the paper forming said substrate has an IGT Silicone Demand at 40 kg of <6 cm.sup.3 /cm.sup.2 and a Heat Stability of <0.5%, the cured silicone coating of said release liner exhibiting a Percent Silicone Extractables of <1 0%.
Dependencies are inferred from the claim text.