Perforated web product
Web products are disclosed which include forming selected perforation designs and patterns. The perforation designs and patterns can be formed in linear or nonlinear fashion, can extend in the cross direction or the machine direction and can be formed to complement or match an embossed or printed design on the web. The perforation designs and patterns can be formed utilizing various mechanical perforating techniques.
1. A web product comprising:
a web formed of paper material having one or more plies and having a first side and a second side, the web having a plurality of spaced apart and repeating lines of perforation, the repeating lines of perforation each comprising a plurality of individual liquid weakener perforations, the plurality of individual liquid weakener perforations extending substantially from the first to the second side generally in a cross direction of the web, each of the individual liquid weakener perforations being formed by printing a liquid weakener onto the web at a discrete location to be weakened, the web being formed of a material strong enough to form a wound or rolled product having a plurality of sheets defined by the repeating lines of perforation but weak enough to separate a selected one of the sheets from the remainder of the wound or rolled product by tearing along one of the repeating lines of perforation.
2. The product of claim 1 wherein the liquid weakener comprises a debonder for printing onto the web at the discrete location for each of the individual liquid weakener perforations.
3. The product of claim 2 wherein the debonder comprises a material which chemically reacts with the paper or the like material to form the individual liquid weakener perforations.
4. The product of claim 1 wherein the liquid weakener printed onto the web is a material having a delayed reaction time before forming the individual liquid weakener perforations.
5. The product of claim 1 wherein the liquid weakener printed onto the web is a tinted material to provide a visual indicator of the individual liquid weakener perforations.
6. The product of claim 1 wherein the liquid weakener comprises a first liquid and a second liquid printed onto the web at each of the discrete locations wherein the first and second liquids interact to form the individual liquid weakener perforations.
7. The product of claim 1 wherein the discrete locations where the liquid weakener perforations are formed are arranged to form a selected perforation design.
8. The product of claim 1 wherein the discrete locations where the liquid weakener perforations are formed are arranged to form a nonlinear perforation design.
9. A web product comprising:
a web formed of paper material having one or more plies and having a first side and a second side, the web having a plurality of spaced apart and repeating lines of perforations, the repeating lines of perforations each comprising a plurality of individual liquid weakener perforations, the plurality of individual liquid weakener perforations extending substantially from the first to the second side generally in a cross direction of the web, at least some of the individual liquid weakener perforations being formed by mechanically weakening the web at discrete locations where the web is to be mechanically weakened and a liquid weakener on the web in one or more locations at or near where the web has been mechanically weakened.
10. The product of claim 9 wherein the liquid weakener printed onto the web is a tinted material to provide a visual indicator of the individual liquid weakener perforations formed by printing the liquid weakener onto the web.
11. The product of claim 9 wherein some of the individual liquid weakener perforations are differently formed to produce a different perforation tensile strength in different areas of the web.
12. The product of claim 9 wherein the liquid weakener printed on the web causes the lines of perforation to have a first tensile strength during production and a second, weaker tensile strength after the web has been converted into a finished product.
13. The product of claim 9 wherein the mechanical weakener and the liquid printing device are positioned to form a selected perforation design.
14. A web product comprising:
a web formed of paper material having one or more plies and having a first side and a second side, the web having a plurality of spaced apart and repeating lines of perforations extending generally in the cross direction and at least one line of perforations extending generally in the machine direction, the repeating lines of perforations extending generally in the cross direction and the at least one line of perforations extending generally in the machine direction each comprising a plurality of liquid weakener perforations wherein each of the liquid weakener perforations is formed at a discrete location, the plurality of liquid weakener perforations generally in the cross direction extending substantially from the first side to the second side of the web and being formed at least in part by liquid weakening of the web by printing a liquid weakener onto the web, the web being formed of a material strong enough to form a wound or rolled product having a plurality of sheets defined by the repeating lines of perforation but weak enough to separate a selected one of the sheets from the remainder of the wound or rolled product by tearing along one of the repeating lines of perforation.
15. The product of claim 14 wherein the liquid weakener printed onto the web is a tinted material to provide a visual indicator of the individual liquid weakener perforations formed by printing the liquid weakener onto the web.
16. The product of claim 14 wherein the liquid weakener comprises a first liquid and a second liquid printed onto the web at each of the discrete locations whereby the first and second liquids interact to form the individual liquid weakener perforations.
17. The product of claim 14 wherein some of the individual liquid weakener perforations are differently formed to produce a different perforation tensile strength in different areas of the web.
18. The product of claim 14 wherein the liquid weakener perforations formed by the liquid weakener have a first perforation tensile strength during production and a second, weaker perforation tensile strength after the web has been converted into a finished product.
19. The product of claim 14 wherein the discrete locations where the lines of perforation in at least one of the cross direction and the machine direction are formed are arranged to form a selected perforation design.
20. The product of claim 14 wherein the discrete locations where the lines of perforation are formed in at least one of the cross direction and the machine direction are arranged to form a nonlinear perforation design.