Composite upholstery fabric panels with enlarged graphite intumescent particles
View Patent ↗Fabric layers and composite articles that incorporate graphite-containing coatings that do not stain are provided. A fabric layer for use as a flame and heat blocking component of an upholstered article includes intumescent graphite particles that are configured to swell and char in the presence of flame so as to form a barrier to flame, hot gases and heat for a predetermined period of time. The graphite particles have a size greater than about 150 microns which prevents the particles from being drawn to a surface of an upholstered article during sewing and quilting operations.
1. A composite upholstery panel, comprising:
a layer of ticking fabric;
a layer of resilient cushioning material; and
a layer of backing fabric comprising a coating of flame blocking material disposed on a surface thereof, wherein the coating comprises intumescent graphite particles having a size that prevents the graphite particles from being drawn through the cushioning material and ticking fabric and to a surface of the ticking fabric during sewing and quilting operations, wherein the intumescent graphite particles swell and char in the presence of a flame so as to form a barrier to flame, hot gases, and heat for a predetermined period of time; and
wherein the ticking fabric, cushioning material, flame blocking material, and backing fabric are quilted together with thread that forms spaced-apart patterns of stitches extending along the composite upholstery panel.
2. The panel of claim 1 , wherein the graphite particles have a size greater than or equal to 150 microns.
3. The panel of claim 1 , wherein the graphite particles have an average size of from 250 to 350 microns, and wherein less than one percent (1%) of the graphite particles have a size less than 150 microns
4. The panel of claim 1 , wherein the coating comprises a polymeric binder and acid-treated expandable graphite particles, and wherein the graphite particles have sizes in the range from 150 microns to 1000 microns.
5. The panel of claim 1 , wherein the graphite particles are acid-treated and are configured to expand at least about fifty times an original volume when exposed to flame.
6. The panel of claim 1 , wherein the cushioning material comprises foam.
7. The panel of claim 1 , wherein the cushioning material comprises a fibrous layer of material.