Densified wood including process for preparation
A wood substrate or member is included, having an increased density with respect to natural, untreated wood. The process includes drying the wood prior to application of heat and pressure, which are controlled to reduce or eliminate color change on a surface of the wood member where heat and pressure are applied.
1. A veneer and core assembly for a flooring component, the veneer and core assembly formed by:
(a) preheating a starter wood member, of a hardwood, by introducing the starter wood member to a temperature in a range of about 250° F. to about 500° F., wherein the preheating is for a time sufficient to reduce moisture content of the starter wood member to between 0 to about 2% and to obtain a core temperature of the starter wood member of about 250° F. to about 500° F.;
(b) after reducing the moisture content of the starter wood member to between 0 to about 2% and obtaining the core temperature of the starter wood member of about 250° F. to about 500° F., applying pressure to the starter wood member for a single press cycle for a press time of about 30 seconds to about 10 minutes to provide a pressed wood member, wherein heat is applied during the applying of pressure to maintain the core temperature during the applying of pressure in a range of about 250° F. to about 500° F.;
(c) providing a post-treatment conditioning of the pressed wood member to provide a treated wood member; and
(d) applying the treated wood member, as a veneer, to a core material to form the veneer and core assembly,
wherein the treated wood member has a density of about 60 pounds per cubic foot to about 85 pounds per cubic foot,
wherein the treated wood member has a top surface with a surface color difference (AE) of less than 20 as compared with a color of a top surface of the starter wood member.
2. The veneer and core assembly of claim 1 , being further formed by:
cooling the pressed wood member before the post-treatment conditioning.
3. The veneer and core assembly of claim 1 , wherein the post-treatment conditioning includes the introduction of steam, humidity, heat or combinations thereof.
4. The veneer and core assembly of claim 1 , wherein the moisture content of the starter wood member prior to the preheating is about 0 to about 19%.
5. The veneer and core assembly of claim 1 , wherein said pressure is about 500 psi to about 5,000 psi.
6. The veneer and core assembly of claim 1 , wherein the applying of pressure is conducted with a heated platen press, a continuous press, a series of mills, or a combination thereof.
7. The veneer and core assembly of claim 1 , being further formed by reducing the moisture content of the starter wood member prior to the preheating.
8. The veneer and core assembly of claim 1 , wherein the hardwood is selected from the group including one or more of: red oak; white oak; hickory; walnut; aspen;
basswood; maple; cherry; and, ash.
9. The veneer and core assembly of claim 1 , wherein the heat is applied during the applying of pressure to maintain the core temperature during the applying of pressure in the range of about 250° F. to about 400° F.
10. The veneer and core assembly of claim 1 , wherein the thickness of the treated wood member is about 30% to about 70% less than the thickness of the starter wood member prior to preheating.
11. An engineered hardwood flooring component comprising a veneer and core assembly formed in accordance with claim 1 , and a locking profile.
12. The engineered hardwood flooring component of claim 11 wherein the hardwood is selected from the group including one or more of: red oak; white oak; hickory; walnut; aspen; basswood; maple; cherry; and, ash.
13. The veneer and core assembly of claim 1 , wherein the density of the treated wood member is uniform therethroughout.