Method for controlling degree of molding in through-dried tissue products
First Claim
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1. A method of controlling the degree of molding of a paper web during formation of a tissue product, said method comprising:
- a) providing a liquid furnish containing papermaking fibers;
b) depositing said furnish onto a foraminous surface to form a paper web;
c) transferring said paper web to a through-drying fabric, said through-drying fabric having a three-dimensional surface contour;
d) deflecting said paper web onto said through-drying fabric using a certain deflection pressure such that said web is substantially molded to said three-dimensional surface contour of said fabric;
e) selectively adjusting the consistency of said paper web from a first solids consistency to a second solids consistency while holding said deflection pressure constant to increase or decrease the degree to which said paper web molds to said three-dimensional surface contour of said through-drying fabric; and
f) substantially drying said paper web with a dryer.
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Abstract
A method of controlling the degree of molding of a paper web during formation of a tissue product is provided. Initially, a liquid furnish of papermaking fibers is deposited onto a foraminous surface. The web is transferred to a through-drying fabric having a three-dimensional surface contour. In one embodiment, during transfer, the wet web is deflected onto the through-drying fabric so that it is molded to the surface contours of the fabric. The degree of molding is controlled by increasing or decreasing the solids consistency of the web without changing the deflection pressure or force.
151 Citations
28 Claims
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1. A method of controlling the degree of molding of a paper web during formation of a tissue product, said method comprising:
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a) providing a liquid furnish containing papermaking fibers;
b) depositing said furnish onto a foraminous surface to form a paper web;
c) transferring said paper web to a through-drying fabric, said through-drying fabric having a three-dimensional surface contour;
d) deflecting said paper web onto said through-drying fabric using a certain deflection pressure such that said web is substantially molded to said three-dimensional surface contour of said fabric;
e) selectively adjusting the consistency of said paper web from a first solids consistency to a second solids consistency while holding said deflection pressure constant to increase or decrease the degree to which said paper web molds to said three-dimensional surface contour of said through-drying fabric; and
f) substantially drying said paper web with a dryer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of controlling the degree of molding of a paper web during formation of a tissue product, said method comprising:
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a) providing a liquid furnish containing papermaking fibers;
b) depositing said furnish onto a foraminous surface to form a paper web;
c) transferring said paper web to a transfer fabric having a three-dimensional surface contour, wherein said transfer fabric travels at a slower speed than said foraminous surface;
d) transferring said paper web from said transfer fabric to a through-drying fabric, said through-drying fabric having a three-dimensional surface contour;
e) deflecting said paper web onto said through-drying fabric with a negative deflection pressure such that said web is substantially molded to said three-dimensional surface contour of said through-drying fabric;
f) selectively decreasing the consistency of said paper web from a first solids consistency to a second solids consistency while holding said deflection pressure constant to increase the degree to which said paper web molds to said three-dimensional surface contour of said through-drying fabric, said second solids consistency being less than about 40%; and
g) substantially drying said paper web with a through-air dryer. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification