Bay Mills Limited

Rosalene Brunka

John Frederick Porter

Hand-tearable barrier laminates are provided which include a reinforcing layer having a first tensile strength laminated to flexible cellulosic web comprising open porosity and a second tensile strength which is less than the first tensile strength. The web is treated with a water-resistant polymeric resin for providing liquid water resistance to the web while permitting water vapor to pass through it. Inexpensive web materials can be substituted for polymer foam and microperforated plastic films currently employed by the housing industry.

Hand-tearable moisture barrier laminate

A hand-tearable barrier laminate includes a reinforcing layer having a first tensile strength. The reinforcing layer is laminated to a flexible cellulosic web. The web has open porosity and a second tensile strength which is less than the first tensile strength. The web is treated with a water-resistant polymeric resin for providing liquid water resistance to the web while permitting water vapor to pass through the web. This hand-tearable barrier laminate can be substituted for polymer foam and microperforated plastic films currently employed by the housing industry, reducing costs.

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St. Catharines, Canada

Rosalene Brunka