Siding Panel Formed of Polymer and Wood Flour
A composite siding panel has a core including PVC resin, wood flour in an amount of about 75 to about 300 parts per hundred parts of PVC resin, a thermal stabilizer in an amount of about 1.2 parts per hundred parts of PVC resin, and a wood stabilizer in an amount of about 0.5 to about 3 parts per hundred parts of PVC resin; and a cap covering a front, a back, a bottom, and a top of the core.
1 . A composite siding panel comprising, in combination:
a core comprising:
PVC resin;
wood flour in an amount of about 75 to about 300 parts per hundred parts of PVC resin;
a thermal stabilizer in an amount of about 1.2 parts per hundred parts of PVC resin; and
a wood stabilizer in an amount of about 0.5 to about 3 parts per hundred parts of PVC resin; and
a cap covering a front, a back, a bottom, and a top of the core.
2 . The composite siding panel of claim 1 , wherein the core further comprises a high molecular weight process aid in an amount of about 4 to about 14 parts per hundred parts of PVC resin.
3 . The composite siding panel of claim 1 , wherein the core further comprises an impact modifier in an amount of about 1 to about 5 parts per hundred parts of PVC resin.
4 . The composite siding panel of claim 1 , wherein the core further comprises a low molecular weight process aid in an amount of about 1 to about 3 parts per hundred parts of PVC resin.
5 . The composite siding panel of claim 1 , wherein the core further comprises calcium carbonate in an amount of about 25 to about 125 parts per hundred parts of PVC resin.
6 . The composite siding panel of claim 1 , wherein the core further comprises a lubricant in an amount of about 10 to about 20 parts per hundred parts of PVC resin.
7 . The composite siding panel of claim 1 , wherein the core further comprises calcium stearate in an amount of about 1 to about 2 parts per hundred parts of PVC resin.
8 . The composite siding panel of claim 1 , wherein the core further comprises a foaming agent in an amount 1 to about 2.5 parts per hundred parts of PVC resin.
9 . The composite siding panel of claim 1 , wherein the wood flour is present in an amount of about 166 parts per hundred parts of PVC resin.
10 . The composite siding panel of claim 1 , wherein the wood stabilizer is present in amount of about 1 part per hundred parts of PVC resin.
11 . The composite siding panel of claim 1 , wherein the core further comprises a high molecular weight process aid in an amount of about 6 parts per hundred parts of PVC resin.
12 . The composite siding panel of claim 1 , wherein the core further comprises an impact modifier in an amount of about 2 parts per hundred parts of PVC resin.
13 . The composite siding panel of claim 1 , wherein the core further comprises a low molecular weight process aid in an amount of about 2 parts per hundred parts of PVC resin.
14 . The composite siding panel of claim 1 , wherein the core further comprises calcium carbonate in an amount of about 75 parts per hundred parts of PVC resin.
15 . The composite siding panel of claim 1 , wherein the core further comprises a lubricant in an amount of about 14 parts per hundred parts of PVC resin.
16 . The composite siding panel of claim 1 , wherein the core further comprises calcium stearate in an amount of about 1.5 parts per hundred parts of PVC resin.
17 . The composite siding panel of claim 1 , wherein the core further comprises a foaming agent in an amount of about 1.5 parts per hundred parts of PVC resin.
18 . The composite siding panel of claim 13 , wherein the cap is formed of PVC.
19 . The composite siding panel of claim 1 , wherein the cap has a thickness between approximately 10 mils and approximately 15 mils.
20 . A composite siding panel comprising, in combination:
a core comprising:
PVC resin;
wood flour in an amount of about 75 to about 300 parts per hundred parts of PVC resin;
a thermal stabilizer in an amount of about 1.2 parts per hundred parts of PVC resin;
a wood stabilizer in an amount of about 0.5 to about 3 parts per hundred parts of PVC resin;
a high molecular weight process aid in an amount of about 4 to about 14 parts per hundred parts of PVC resin;
an impact modifier in an amount of about 1 to about 5 parts per hundred parts of PVC resin;
a low molecular weight process aid in an amount of about 1 to about 3 parts per hundred parts of PVC resin;
calcium carbonate in an amount of about 25 to about 125 parts per hundred parts of PVC resin;
calcium stearate in an amount of about 1 to about 2 parts per hundred parts of PVC resin; and
a lubricant in an amount of about 10 to about 20 parts per hundred parts of PVC resin; and
a cap formed of PVC and covering a front, a back, a bottom, and a top of the core.
21 . A composite siding panel comprising, in combination:
a core comprising:
PVC resin;
wood flour in an amount of about 166 parts per hundred parts of PVC resin;
a thermal stabilizer in an amount of about 1.2 parts per hundred parts of PVC resin;
a wood stabilizer in an amount of about 1 part per hundred parts of PVC resin;
a high molecular weight process aid in an amount of about 6 parts per hundred parts of PVC resin;
an impact modifier in an amount of about 2 parts per hundred parts of PVC resin;
a low molecular weight process aid in an amount of about 2 parts per hundred parts of PVC resin;
calcium carbonate in an amount of about 75 parts per hundred parts of PVC resin;
calcium stearate in an amount of about 1.5 parts per hundred parts of PVC resin; and
a lubricant in an amount of about 14 parts per hundred parts of PVC resin; and
a cap formed of PVC and covering a front, a back, a bottom, and a top of the core.