Soft through air dried tissue
A process for manufacturing tissue including providing a first pulp mix, delivering a wet-end additive to the first pulp mix at a first point in the process, forming a tissue web comprising the first pulp mix after the first point in the process, monitoring the tissue web for breaks and preventing delivery of the wet-end additive to the first pulp mix at the first point in response to detecting a break in the monitoring step. In an exemplary embodiment, a switching valve is used to control delivery of the wet-end additive to the first pulp mix.
1. A process for manufacturing tissue, comprising:
providing a first pulp mix;
delivering a wet-end additive to the first pulp mix at a first point in the process;
forming a tissue web comprising the first pulp mix after the first point in the process;
monitoring the tissue web for breaks; and
preventing delivery of the wet-end additive to the first pulp mix at the first point in response to detecting a break in the monitoring step.
2. The method of claim 1 , wherein the monitoring step is performed by a sensor that detects a break in the tissue web.
3. The method of claim 2 , wherein the preventing step is performed by a switching valve that is responsive to the sensor.
4. The method of claim 3 , further comprising closing the switching valve when the sensor detects a break in the tissue web.
5. The method of claim 4 , wherein:
the step of forming the tissue web comprises:
forming a first exterior layer comprising a second pulp mix;
forming a second exterior layer comprising a third pulp mix; and
forming an interior layer between the first exterior layer and the second exterior layer comprising the first pulp mix.
6. The method of claim 4 , further comprising rewinding the tissue web after detecting the break.
7. The method of claim 6 , further comprising opening the switching valve after rewinding the tissue web.
8. The method of claim 1 , wherein the wet-end additive comprises a debonder.
9. A method of manufacturing tissue, comprising:
providing a wet-end additive to a first pulp mix at a first point in the process;
forming a tissue web comprising the first pulp mix after the first point in the process;
drying the tissue web to form a basesheet tissue;
winding the basesheet tissue onto a first roll;
prior to completion of winding onto the first roll, preventing delivery of the wet-end additive to the first pulp mix at the first point;
after completion of the winding onto the first roll, transferring the basesheet tissue from a first roll to a second roll for winding of the basesheet tissue onto the second roll; and
proceeding with providing the wet-end additive at the first point after winding onto the second roll begins.
10. The method of claim 9 , wherein the preventing step is performed by a switching valve.
11. The method of claim 10 , wherein the step of preventing delivery comprises closing the switching valve.
12. The method of claim 11 , wherein the step of proceeding with providing the wet-end additive comprises opening the switching valve after the tissue web has begun winding on the second roll.
13. The method of claim 12 , wherein the second roll comprises:
a first section of basesheet tissue located at the center of the second roll, wherein the first section does not include the wet-end additive; and
a second section of basesheet tissue located on the outside of the first section, wherein the second section includes the wet-end additive.
14. The method of claim 13 , wherein the second roll further comprises a third section of basesheet tissue located on the outside of the second section, wherein the third section does not include the wet-end additive.
15. The method of claim 9 , wherein the wet-end additive comprises a debonder.