Former of water laid asset that utilizes a structured fabric as the outer wire
A method of forming a fibrous web including the steps of providing a fiber slurry, depositing the fiber slurry between an inner forming wire and an outer forming wire, wherein the outer forming wire comprises a structured fabric and the inner forming wire contacts a segment of a forming roll, and rotating the forming roll so that the fiber slurry moves into contact with the structured fabric.
1. A method of forming a fibrous web, comprising the steps of:
providing a fiber slurry;
depositing the fiber slurry between an inner forming wire and an outer forming wire, wherein the outer forming wire comprises a structured fabric and the inner forming wire contacts a forming roll; and
rotating the forming roll so that the fiber slurry moves into contact with the structured fabric.
2. The method of claim 1 , wherein the step of depositing is performed by a single layer headbox, a double layer headbox or a triple layer headbox.
3. The method of claim 1 , wherein fibers within the fiber slurry comprise natural fibers, synthetic fibers or a combination of natural and synthetic fibers.
4. The method of claim 1 , wherein the fiber slurry comprises up to 99.95% water.
5. The method of claim 1 , further comprising the step of draining the fiber slurry through the structured fabric.
6. The method of claim 5 , further comprising:
separating the inner forming wire from the outer forming wire; and
applying negative pressure from a vacuum box located on an underside of the outer forming wire to adhere a web formed from the fiber slurry to the outer forming wire.
7. The method of claim 6 , further comprising the step of dewatering the web by passing the web across one or more vacuum boxes.
8. The method of claim 6 , further comprising the step of drying the web, the drying step performed using a belt press having a hot air impingement hood, through air drying cylinders with associated air recirculation systems, or pressure rolls and steam heated cylinders with or without hot air impingement hoods.
9. The method of claim 8 , further comprising the step of creping the web from a steam heated cylinder.
10. The method of claim 8 , further comprising the steps of calendering and reeling the web.
11. The method of claim 1 , wherein the structured fabric comprises woven monofilaments, the woven monofilaments comprising synthetic polymers.
12. The method of claim 11 , wherein the synthetic polymers comprise polyethylene, polypropylene or nylon.
13. The method of claim 11 , wherein the structured fabric further comprises an overlaid resin.
14. The method of claim 1 , wherein the structured fabric is formed by laying down successive layers of material under computer control.
15. The method of claim 14 , wherein the process of laying down successive layers of material comprises: Fused Deposition Modeling (FDM), PolyJet Technolgy, Selective Laser Melting (SLM), Direct Metal Laser Sintering (DMLS), Selective Laser Sintering (SLS), Stereolithography (SLA), or Laminated Object Manufacturing (LOM).
16. A wet section of a paper forming machine, comprising:
a headbox;
a forming roll disposed adjacent to the headbox;
an inner forming wire in contact with the forming roll; and
an outer forming wire comprising a structured fabric;
wherein the headbox is configured to deliver a fiber slurry to a nip formed between the inner forming wire and the outer forming wire as the forming roll rotates.
17. The wet section of claim 16 , wherein the headbox is a single layer headbox, a double layer headbox or a triple layer headbox.