Three-dimensional papermaking belt
The present invention relates to belts useful in the manufacture of paper products, such as tissue paper. Particularly this invention relates to a belt used in a through-air drying process for making tissue products, and more particularly to an additively manufactured belt having a particular pattern thereon which imparts properties to tissue products manufactured therewith.
1. An additive-process for manufacturing a three-dimensional element on an endless papermaking belt comprising the steps of:
a. providing an endless papermaking belt;
b. providing an extrusion head coupled to a z gantry for dispensing a flowable material selected from the group consisting of PET (polyester), PPS (polyphenylene sulphide), PCTA (poly 1,4 cyclohexane dimethylene terephthalate), PEN (polyethylene naphthalate), PVDF (polyvinylidene fluoride) and PEEK (polyetheretherketone), either alone or in combination onto the structure;
c. transporting extrusion head or the endless papermaking belt in the x and y directions while discharging the flowable material from the extrusion head onto the endless papermaking belt to form the cross-sectional shape of an element; and
d. transporting the housing and head member in the z-direction incrementally to form the element in elevation, wherein the element has a top surface, a bottom surface in contact with the endless papermaking belt, a pair of opposed sidewalls, a first aperture disposed on the top surface and a second aperture disposed on the bottom surface, and a continuous channel connecting the first and second apertures.
2. The method of claim 1 wherein the flowable material has a viscosity in the range from 70,000 to 100,000 Centipoise.
3. The method of claim 1 wherein the flowable material has a viscosity in the range from 100,000 to about 150,000 Centipoise.
4. The method of claim 1 wherein the extrusion head comprises a plurality of nozzles, the method further comprising feeding from at least one nozzle, a temporary support medium for providing temporary support to said material during manufacture of the element.
5. The method of claim 1 wherein the element is a continuous line element.
6. The method of claim 1 wherein the continuous line element has a rectangular cross-section having a height from about 0.5 to about 3.5 mm and a width from about 0.5 to about 3.5 mm.