Single-pass process for forming a multilayered shaped film product
A process includes placing a mask over a substrate; delivering liquid film-forming compositions through the mask to the substrate; removing the mask to leave a multilayered raw shape on the substrate; and curing the multilayered raw shape to form the multilayered shaped film product disposed on the substrate. The mask has a delivery surface, an opposite surface and at least one aperture having a design corresponding to the desired shaped film product. The film-forming compositions are delivered through a multistream nozzle. The movement of the mask and the delivery of the first and second liquid film-forming compositions to the mask aperture are controlled to provide a volumetric flow rate of the first and second liquid film-forming compositions to the mask aperture corresponding to the volume of a void. The nozzle is in contact with the delivery surface of the mask.
1. A process for forming a multilayered shaped film product comprising the steps of:
a. placing a mask having a delivery surface and an opposite substrate-facing surface and at least one aperture having a design corresponding to the desired shaped film product over a substrate;
b. delivering a first liquid film-forming composition through a first delivery opening of a multistream nozzle and a second liquid film-forming composition through a second delivery opening of the multistream nozzle through the at least one aperture of the mask to form a raw shape having a first layer and a second layer on the substrate; wherein movement of the mask and the delivery of the first and second liquid film-forming compositions to the mask aperture are controlled to provide a volumetric flow rate of the first and second liquid film-forming compositions to the mask aperture corresponding to the volume of a void defined by the mask aperture, aperture sidewalls and deliver openings of the nozzle immediately adjacent to the mask aperture, the nozzle being in contact with the delivery surface of the mask;
c. removing the mask;
d. solidifying the raw shape to provide the multilayered shaped film product disposed on the substrate.
2. The process of claim 1 wherein the fluid flow of the first and second liquid film-forming compositions onto the substrate is substantially laminar.
3. The process of claim 1 wherein the first film-forming composition is delivered to the substrate and the second film-forming composition is delivered to an upper surface of the first film-forming composition.
4. The process of claim 1 wherein the first and second film-forming compositions are delivered to the substrate, aligned adjacent along a machine direction.
5. The process of claim 1 further comprising a delivering a third liquid film-forming composition through a third delivery opening of the multistream nozzle, wherein the first delivery opening of the multistream nozzle has a cross-dimension greater than that of the mask aperture, the first film-forming composition is delivered to the substrate, and the second and third delivery openings are aligned adjacent and arranged and configured to deliver the second and third liquid film-forming compositions to an upper surface of the first film-forming composition.