Multi-layer wrapping material with water vapor-permeable inner layer
AssigneesInterwrap Inc., Ibco Srl
InventorMartin Vido
Life of this patent
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Abstract
A multi-layered sheet material for wrapping metal goods to protect them from corrosion during storage has a water impermeable and water vapor-impermeable outer layer comprising a coated woven scrim and a water-impermeable and water vapor permeable inner layer comprising a micro-perforated film. The inner layer incorporates corrosion inhibitors. The outer and inner layers are bonded along their longitudinal edges leaving a space between the layers into which water vapor can migrate away from the wrapped metal product.
Claims18
A sheet material for wrapping metal goods, comprising:
- (a) a first layer comprising a coated woven scrim, said coated scrim being water-impermeable and water vapor-impermeable;
- (b) a second layer that is water-impermeable and water vapor-permeable and incorporates a corrosion inhibitor, said second layer being attached to said first layer at narrow, spaced-apart strips along two opposed edges of said first and second layers, said second layer having a water vapor permeance in the range of 170 to 1,400 ng/Pa per second per square meter.
A sheet material for wrapping metal goods, comprising:
- (a) a first layer comprising a coated woven scrim, said coated scrim being water-impermeable and water vapor-impermeable;
- (b) a second layer that is water-impermeable and water vapor-permeable and incorporates a corrosion inhibitor, said second layer being attached to said first layer at narrow, spaced-apart strips along two opposed edges of said first and second layers, wherein said second layer is microperforated.
A sheet material for wrapping metal goods, comprising:
- (a) a first layer comprising a coated woven scrim, said coated scrim being water-impermeable and water vapor-impermeable;
- (b) a second layer comprising a film, said film being water-impermeable and water vapor-permeable, said second layer having a water vapor permeance in the range of 170 to 1,400 ng/Pa per second per square meter;
- (c) a third layer comprising kraft paper bonded to a side of said first layer, said third layer being attached to said second layer at narrow, spaced-apart strips along two opposed edges of said third and second layers;
- (d) a corrosion inhibitor incorporated in at least one of said second and third layers.
A sheet material for wrapping metal goods, comprising:
- (a) a first layer comprising a coated woven scrim, said coated scrim being water-impermeable and water vapor-impermeable;
- (b) a second layer comprising a film, said film being water-impermeable and water vapor-permeable, said second layer being microperforated;
- (c) a third layer comprising kraft paper bonded to a side of said first layer, said third layer being attached to said second layer at narrow, spaced-apart strips along two opposed edges of said third and second layers;
- (d) a corrosion inhibitor incorporated in at least one of said second and third layers.
Dependencies are inferred from the claim text.