Soft multi-ply tissue paper having a surface deposited strengthening agent
First Claim
1. A strong and soft multi-ply tissue paper product, said multi-ply tissue paper product comprising at least two plies in face to face relationship, wherein each of said plies has an interior surface oriented toward the interior of said multi-ply tissue paper product, wherein at least one of said interior surfaces of said plies has a surface deposited strengthening agent, said strengthening agent being deposited on said surface in a first relatively diffiuse pattern essentially covering the entirety of said surface and in a second relatively uniform sparse pattern which is deposited on said surface at a frequency of between about 0.2 and about 2 deposits per inch, said second deposits having a diameter of at least 1000 microns wherein said strengthening agent comprises from about 0.5 to about 10% of said tissue paper product by weight based on the dry weight of said strengthening agent compared to the dry weight of said multiply tissue product.
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Accused Products
Abstract
Strong and soft multi-ply tissue paper products useful as absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels are disclosed. At least one internal surface of the tissue paper product has a surface deposited strengthening agent.
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Citations
23 Claims
- 1. A strong and soft multi-ply tissue paper product, said multi-ply tissue paper product comprising at least two plies in face to face relationship, wherein each of said plies has an interior surface oriented toward the interior of said multi-ply tissue paper product, wherein at least one of said interior surfaces of said plies has a surface deposited strengthening agent, said strengthening agent being deposited on said surface in a first relatively diffiuse pattern essentially covering the entirety of said surface and in a second relatively uniform sparse pattern which is deposited on said surface at a frequency of between about 0.2 and about 2 deposits per inch, said second deposits having a diameter of at least 1000 microns wherein said strengthening agent comprises from about 0.5 to about 10% of said tissue paper product by weight based on the dry weight of said strengthening agent compared to the dry weight of said multiply tissue product.
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10. A process for producing a soft, strong multi-ply tissue paper product, said process comprising the steps of
a) applying by surface deposition a fluidized strengthening agent onto the surface of a tissue paper web thereby forming a surface strengthened tissue paper web comprising from about 0.5% to about 10% of said strengthening agent wherein said strengthening agent is applied to said surface in a first relatively diffuse pattern essentially covering the entirety of said surface and in a second relatively uniform sparse pattent which is deposited on said surface at a frequency of between about 0.2 and about 2 deposits per inch said second deposits having a diameter of at least 1000 microns ; - and
b) combining said surface strengthened tissue paper web of step (a) with at least one additional tissue paper web to form a multiply tissue paper product, orienting said surface strengthened tissue paper web being oriented such that the surface comprising the strengthening agent forms an interior surface of said multi-ply tissue paper product;
wherein said multi-ply tissue paper product comprises tissue paper webs which remain unbonded over at least a majority of the surface of said webs. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification