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US 7,622,159 B2Granted
Release liners and processes for making the same
AssigneeLoparex, Inc.
InventorsWilliam J. Mertz, Danny C. Thompson, Katherine Yiu-Kit Leung
Life of this patent
Estimating the term…
Abstract
Release liners and processes for making the same are disclosed. The release liners include no more than about 1.5 micrograms/square centimeter of nonreacted silicone materials (extractables). The release liners are prepared using solvent coating of radiation curable silicone release materials.
Claims15
A release liner comprising:
- a substrate having opposing surfaces;
- and,
- a radiation curable silicone release coating dissolved in an organic solvent and absent a crosslinkable silicone hydride resin coated onto a surface thereof, the coating being treated with heating and optionally, high velocity air to evaporate the solvent reducing the amount of silicone extractables and outgassing siloxane compounds, prior to curing the coating with radiation, wherein the resulting coating comprises no more than 1.5 micrograms per square centimeter total silicone extractables and no more than 10 ppm total volatile compounds.
A release liner comprising:
- a substrate having opposing surfaces;
- and,
- a radiation curable silicone release coating dissolved in an organic solvent capable of evaporation, absent a crosslinkable silicone hydride resin coated onto a surface thereof, the coating being treated with heating to a temperature of at least 200° F. to evaporate the solvent prior to curing with radiation, reducing the amount of silicone extractables wherein the coating comprises no more than 1.5 micrograms per square centimeter total silicone extractables and no more than approximately 10 ppm total volatile organic compounds.
A release liner comprising:
- a substrate having opposing surfaces;
- and,
- a radiation curable silicone release coating dissolved in an organic solvent absent a crosslinkable silicone hydride resin coated onto a surface thereof, the coating being treated with heating to evaporate the solvent prior to curing with radiation, reducing the amount of silicone extractables and outgassing siloxane compounds, wherein the coating comprises no more than 1.5 micrograms per square centimeter total silicone extractables and no more than approximately 10 ppm total volatile compounds.
Dependencies are inferred from the claim text.