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US 5,089,296 AGranted
Foam saturation and release coating of a fibrous substrate
AssigneeAir Products and Chemicals, Inc.
InventorsRichard A. Bafford, George E. Faircloth
Life of this patent
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Abstract
A release coating is applied to a paper web or other woven or non-woven substrate in the form of a foam. A foamed saturant can also be applied to the paper web or other substrate followed by the application of a foamed or unfoamed release coating composition to the paper web, without an intermediate drying step between the application of the foamed saturant, and the application of the release coating.
Claims22
A method for making a pressure sensitive adhesive tape comprising:
- (a) forming a foam composition containing a sufficient amount of a release coating for a pressure sensitive adhesive and having a blow ratio of about 5 to 30;
- (b) contacting the foamed release coating composition onto the surface of one side of a substrate which is a paper or a woven or non-woven fabric and collapsing the foam into a liquid in sufficient amount to coat and remain on the surface;
- (c) drying the substrate;
- and
- (d) applying a coating of a pressure sensitive adhesive to the surface of the substrate opposite to the surface coated with the release coating composition.
2 more elements
A method for making a pressure sensitive adhesive tape comprising:
- (a) forming a foam composition containing a sufficient amount of a saturant;
- (b) contacting the foamed saturant onto a fibrous substrate which is a paper or a woven or non-woven fabric and collapsing the foam, thereby impregnating the fibrous substrate with the saturant;
- (c) forming a foam release coating composition containing a sufficient amount of a release coating for a pressure sensitive adhesive and having a blow ratio of about 5-30;
- (d) contacting the foamed release coating composition onto the surface of one side of the fibrous substrate following the impregnation of the saturant without an intermediate drying step;
- (e) collapsing the foamed release coating composition into a liquid in sufficient amount to coat and remain on the surface;
- (f) drying the saturant impregnated, release coated fibrous substrate;
- and
- (g) applying a coating of pressure sensitive adhesive to the surface of the fibrous substrate opposite the surface coated with the release coating composition.
5 more elements
Dependencies are inferred from the claim text.