Slat for covering for architectural openings
View Patent ↗A slat for use in a covering for an architectural opening is made from a base material of binder and matrix fibers which are formed into a nonwoven material by melting at least a portion of the binder fibers to thermally bond the binder and matrix fibers. A coating of resin is then applied to the thermally bonded base before the composite material is passed through a forming apparatus where the material is heated over a convex support having the desired curvature for the slat and subsequently cooled.
1. A covering for an architectural opening comprising in combination:
a headrail,
a plurality of slats suspended from said headrail, said slats having a nonwoven base including both binder and matrix fibers wherein the binder fibers include a thermo-sensitive sheath with a given melting temperature below the melting temperature of the matrix fibers and wherein the binder fibers and matrix fibers are thermo-mechanically bound together by melting the sheath and subsequently allowing it to cool, said base subsequently being coated with resin by passing it through a foam bath of resin which also saturates the base, and finally curing the resin with heat in a manner such that the coated base will expand in thickness.
2. The covering of claim 1 wherein the binder fibers are a thermoplastic material.
3. The covering of claim 1 wherein the matrix fibers are a thermoset material.
4. The covering of claim 1 wherein the matrix fibers are a thermoplastic material.
5. The covering of claim 1 wherein said binder fibers and matrix fibers are stable at temperatures of 356° F.
6. The covering of claim 1 wherein said base includes two layers of blended binder fibers and matrix fibers with one layer being carded in the machine direction and the other layer carded in the cross direction.
7. The covering of claim 1 wherein said resin material is cross-linked in said base.
8. The covering of claim 1 wherein said slat has a transverse curvature molded therein by heat and retained by cross-linking said resin subsequent to molding the curvature.