Back to results
US 2004/0121079 A1Published application
Method of producing a multilayer coated substrate having improved barrier properties
AssigneeDow Global Technologies LLC
InventorsRobert Urscheler, Francis Dobler
Life of this patent
Estimating the term…
Abstract
The present invention refers to a method of producing a coated substrate comprising the steps of: a) forming a composite, multilayer free flowing curtain, whereby the multilayer free flowing curtain comprises at least two layers imparting at least two different barrier functionalities and b) contacting the curtain with a continuous web substrate.
Claims41
A method of producing a coated substrate comprising the steps of:
- a) forming a composite, multilayer free flowing curtain, whereby the multilayer free flowing curtain comprises at least two layers imparting at least two different barrier functionalities selected from the group consisting of oil and/or grease barrier functionality, water vapor barrier functionality, water resistance functionality, and oxygen barrier functionality, and
- b) contacting the curtain with a continuous web substrate, whereby,
- in case an oil and/or grease barrier layer is present in the multilayer curtain the coated substrate has a Kit value of at least about 5 in the flat-test,
- in case a water vapor barrier layer is present in the multilayer curtain the coated substrate has a water vapor transmission rate of less than about 50 g/(m2/day) (50% relative humidity, 23° C.),
- in case a water resistance layer is present in the multilayer curtain the coated substrate has a 10 minute Cobb value of less than about 20 g/m2,
- in case an oxygen barrier layer is present in the multilayer curtain the coated substrate has an oxygen transmission rate of less than about 200 cm3/(m2/d/bar) (1 atm, 23° C., 90% relative humidity).
3 more elements
A method of producing a coated substrate comprising the steps of:
- a) forming a composite, multilayer free flowing curtain, whereby the multilayer free flowing curtain comprises at least two layers imparting at least two different barrier functionalities selected from the group consisting of oil and/or grease barrier functionality, water vapor barrier functionality, water resistance functionality, aroma barrier functionality, organic solvent barrier functionality, and oxygen barrier functionality, and
- b) contacting the curtain with a continuous web substrate.
A method of producing a coated substrate comprising the steps of:
- a) forming a composite, multilayer free flowing curtain, wherein at least one of the layers of the curtain has a coatweight when dried of less than about 30 g/m2, the curtain has a solids content of at least about 40 wt. %, and at least one layer of the curtain comprises polyethylene oxide, whereby the multilayer free flowing curtain comprises at least two layers imparting at least two different barrier functionalities selected from the group consisting of oil and/or grease barrier functionality, water vapor barrier functionality, water resistance functionality, and oxygen barrier functionality, and
- b) contacting the curtain with a continuous web substrate having a velocity of at least about 200 m/min., whereby,
- in case an oil and/or grease barrier layer is present in the multilayer curtain the coated substrate has a Kit value of at least about 5 in the flat-test,
- in case a water vapor barrier layer is present in the multilayer curtain the coated substrate has a water vapor transmission rate of less than about 50 g/(m2/day) (50% relative humidity, 23° C.),
- in case a water resistance layer is present in the multilayer curtain the coated substrate has a 10 minute Cobb value of less than about 20 g/m2,
- in case an oxygen barrier layer is present in the multilayer curtain the coated substrate has an oxygen transmission rate of less than about 200 cm3/(m2/d/bar) (1 atm, 23° C., 90% relative humidity).
3 more elements
Dependencies are inferred from the claim text.