Paper laminates manufactured using foamed adhesive systems
First Claim
1. A method of making a foamed adhesive, comprising the steps of:
- (a) causing one or more flows of an adhesive composition to impact one or more flows of a pressurized gas in a chamber under conditions such that at least portions of the impacting flows mixingly interact to form a foamed adhesive in the chamber, wherein the adhesive composition and the pressurized gas are supplied at a pressure in the range of from about 7 kPa (gauge) to about 70 kPa (gauge); and
(b) dispensing the foamed adhesive from the chamber.
1 Assignment
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Accused Products
Abstract
Foamed, aqueous adhesive compositions are used to manufacture tissue laminate products including or especially as bathroom tissue, facial tissue, paper towels, and the like. Foaming typically occurs by introducing pressurized gas and adhesive flows in a nozzle chamber on demand, wherein the kinetic energy of the flows is used to provide mixing energy. The adhesive preferably is dispensed as a plurality of discrete, foamed adhesive particles. The foamed adhesive can be used for intralamina bonds, interlaminate bonds, bonding loose sheet extremities, bonding roll to roll, and the like. The invention provides a reliable, straightforward way to accomplish in-nozzle foaming of an adhesive.
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Citations
20 Claims
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1. A method of making a foamed adhesive, comprising the steps of:
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(a) causing one or more flows of an adhesive composition to impact one or more flows of a pressurized gas in a chamber under conditions such that at least portions of the impacting flows mixingly interact to form a foamed adhesive in the chamber, wherein the adhesive composition and the pressurized gas are supplied at a pressure in the range of from about 7 kPa (gauge) to about 70 kPa (gauge); and
(b) dispensing the foamed adhesive from the chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18)
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16. A method of applying foamed adhesive to a substrate, comprising the steps of:
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(a) supplying ingredients comprising an adhesive and a gas to a plurality of nozzle chambers of a nozzle array;
(b) causing at least portions of the adhesive and the gas to mixingly interact in the chambers to form a foamed adhesive in the absence of mechanical mixing; and
(c) dispensing the foamed adhesive from the nozzle array onto the substrate. - View Dependent Claims (17)
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19. A method of making a foamed adhesive, comprising the steps of:
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(a) causing one or more flows of an adhesive composition to impact one or more flows of a pressurized gas in a chamber under conditions such that at least portions of the impacting flows mixingly interact to form a foamed adhesive in the one or more chambers; and
(b) dispensing the foamed adhesive from the chamber, wherein the chamber has at least one inlet through which adhesive is introduced to the chamber and at least one outlet from which foamed adhesive is dispensed from the chamber, and wherein the total opening size of the at least one inlet is less than the total opening area of the at least one outlet. - View Dependent Claims (20)
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Specification