Production of backing component for carpet products
Disclosed are plastic compositions for a carpet backing having from about 5 to about 25% by weight PVC resin, from about 5 to about 25% by weight plasticizer, and from about 50 to about 90% by weight filler. In a preferred embodiment, the plastic composition is about 15% by weight Geon-138, about 15% by weight di-isononyl phthalate, and about 70% by weight fly ash. Also disclosed are methods for forming backings for floorcoverings using the disclosed plastic compositions. In preferred embodiments, a plastic composition is applied through a slot-die directly to the underside of a carpet or alternatively onto a conveyor belt on top of which the carpet or floorcovering may be subsequently positioned.
1 . A plastic composition for a carpet backing comprising from about 5 to about 25% by weight PVC resin, from about 5 to about 25% by weight plasticizer, and from about 50 to about 90% by weight filler.
2 . The plastic composition according to claim 1 , wherein the PVC resin is selected from the group consisting of Geon-138, Geon-121, Formolon-40, VC-216 and combinations thereof.
3 . The plastic composition according to claim 1 , wherein the plasticizer is selected from the group consisting of di-isononyl phthalate, di-isoheptyl phthalate, di-isoundecyl phthalate and combinations thereof.
4 . The plastic composition according to claim 1 , wherein the filler is selected from the group consisting of fly ash, dirt, calcium carbonate and combinations thereof.
5 . The plastic composition according to claim 1 , comprising about 15% by weight Geon-138, about 15% by weight di-isononyl phthalate, and about 70% by weight fly ash.
6 . The plastic composition according to claim 1 , wherein the plastic composition has a viscosity of from about 30,000 to about 50,000 centipoise.
7 . A floorcovering backing comprising the plastic composition according to claim 1 .
8 . The floorcovering backing of claim 7 , wherein the plastic composition has a thickness of from about 20 to about 75 mils.
9 . The floorcovering backing of claim 8 , wherein the plastic composition has a thickness of about 25 mils.
10 . A method for forming a floorcovering comprising:
a. preparing a plastic composition by mixing from about 5 to about 25% by weight PVC resin, from about 5 to about 25% by weight plasticizer, and from about 50 to about 90% by weight filler; and
b. forming the plastic composition into a backing layer.
11 . The method of claim 10 , wherein forming the plastic composition into a backing layer comprises feeding the plastic composition through a slot-die.
12 . The method of claim 11 , wherein the plastic composition is prepared in a holding tank and pumped from the holding tank to the slot die with a gear pump or an extruder.
13 . The method of claim 10 , wherein:
a. the PVC resin is selected from the group consisting of Geon-138, Geon-121, Formolon-40, VC-216 and combinations thereof;
b. the plasticizer is selected from the group consisting of di-isononyl phthalate, di-isoheptyl phthalate, di-isoundecyl phthalate and combinations thereof; and
c. the filler is selected from the group consisting of fly ash, dirt, calcium carbonate and combinations thereof.
14 . The method of claim 13 , wherein the plastic composition comprises about 15% by weight Geon-138, about 15% by weight di-isononyl phthalate, and about 70% by weight fly ash.
15 . The method of claim 11 , wherein the backing layer exiting the slot-die is positioned directly onto a conveyor belt.
16 . The method of claim 15 , further comprising positioning a face of the floorcovering above the backing layer.
17 . The method of claim 16 , further comprising positioning a stabilizing layer between the backing layer and the face.
18 . The method of claim 17 , wherein the floorcovering comprises carpet.
19 . The method of claim 11 , wherein the backing layer exiting the slot-die is positioned on the underside of a face of the floorcovering.
20 . The method of claim 19 , wherein the floorcovering comprises carpet.