Breathable backing or release liner and process for forming the same
AssigneeMead Release Products, Inc.
InventorAndrew P. LeBel
Life of this patent
Estimating the term…
Abstract
A breathable backing or release liner comprising a breathable, woven or non-woven support member having a silicone-release coating on essentially only one side thereof, said coating being formed by applying a radiation-curable composition containing a polysiloxane to one side of said support and exposing said composition to radiation such that said composition does not substantially penetrate said support.
Claims20
A breathable backing or release liner comprising a breathable, woven or non-woven support member having a silicone-release coating on essentially only one side thereof, said coating being formed by applying a radiation-curable composition containing a polysiloxane to one side of said support and exposing said composition to radiation such that said composition does not substantially penetrate said support, and said support member having a moisture vapor transmission rate greater than 250 g/sq.m./24 hrs./20.degree. C./80% RH and air permeability greater than 80 cu. ft./min./sq. ft.
A process for preparing a breathable backing or release liner which comprises the sequentially performed steps of:
- (a) providing a woven or non-woven breathable support member having two sides, said support member having a moisture vapor transmission rate greater than 250 g/sq.m./24 hrs./20.degree. C./80% RH and /or an air permeability greater than 80 cu. ft./min./sq. ft.,
- (b) applying a radiation curable composition containing a polysiloxane to one side of said support member, and
- (c) exposing said radiation curable composition to radiation to cure said composition, said steps (b) and (c) being conducted in such a manner that said composition does not substantially penetrate said support member.
Dependencies are inferred from the claim text.