[특허]Oriented strand board panel having improved strand alignment and a method for making the same

[미국특허] Oriented strand board panel having improved strand alignment and a method for making the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-005/12
출원번호	UP-0012910 (2004-12-15)
등록번호	US-7547488 (2009-07-01)
발명자 / 주소	Dimakis, Alkiviades G. Shantz, Roger M.
출원인 / 주소	Weyerhaeuser NR Company
대리인 / 주소	Weyerhaeuser IP Department
인용정보	피인용 횟수 : 2 인용 특허 : 58

초록 ▼

An oriented strand board panel and a method for making the same are provided. The OSB panel has at least three layers, namely, a top surface layer, a core layer, and a bottom surface layer. A first cover layer may be provided on the top surface layer. Likewise, a second cover layer may be provided underneath the bottom surface layer. The first cover layer and/or the second cover layer may have a smaller strand angle, defined by an average deviation of strands from a longitudinal axis, than the top surface layer and the bottom surface layer. The smaller strand angles for the first cover layer and/or the second cover layer provide the OSB panel with greater stiffness and strength along the strong direction of the panel without significant compromise of strength and/or stiffness in the weak direction of the panel.

대표청구항 ▼

What is claimed is: 1. An oriented strand board panel comprising: a top surface layer having a substantially planar body comprised of a plurality of wood-based strands wherein the plurality of wood-based strands has a first strand angle defined by an average deviation from a longitudinal axis of the top surface layer wherein the first strand angle is approximately positive/negative 15 degrees to 30 degrees, and wherein the top surface layer has a top surface strand density; a core layer adjacent to the top surface layer wherein the core layer comprises a plurality of wood-based strands having an alignment in a direction non-parallel to the longitudinal axis of the top surface layer, wherein the core layer has a core layer strand density that is-greater than the top surface layer strand density; a bottom surface layer adjacent to the core layer wherein the bottom surface layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a second strand angle defined by an average deviation from a longitudinal axis of the bottom surface layer wherein the second strand angle is approximately positive/negative 15 degrees to 30 degrees, and wherein the bottom surface aver has a bottom surface strand density that is less than the core layer strand density; and a first cover layer on the top surface layer wherein the first cover layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a third strand angle defined by an average deviation from a longitudinal axis of the first cover layer wherein the third strand angle is less than the first strand angle and the second strand angle. 2. The oriented strand board panel of claim 1 further comprising: a second cover layer adjacent to the bottom surface layer wherein the second cover layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a fourth strand angle defined by an average deviation from a longitudinal axis of the second cover layer wherein the fourth strand angle is less than the first strand angle and the second strand angle. 3. The oriented strand board panel of claim 1 wherein the third strand angle is in a range from zero degrees to positive/negative fifteen degrees. 4. The oriented strand board panel of claim 1 wherein the wood-based strands have a length in a range from 2 inches to 8 inches. 5. The oriented strand board panel of claim 1 wherein the top surface layer has more strands than the first cover layer. 6. An oriented strand board panel comprising: a top surface layer having a substantially planar body comprised of a plurality of wood-based strands wherein the plurality of wood-based strands has a first strand angle defined by an average deviation from a longitudinal axis of the top surface layer wherein the first strand angle is approximately positive/negative 15 degrees to 30 degrees, and wherein the top surface layer has a top surface strand density; a core layer adjacent to the top surface layer wherein the core layer comprises a plurality of wood-based strands having an alignment in a direction non-parallel to the longitudinal axis of the top surface layer, wherein the core layer has a core layer strand density that is greater than the top surface layer strand density; a bottom surface layer adjacent to the core layer wherein the bottom surface layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a second strand angle defined by an average deviation from a longitudinal axis of the bottom surface layer wherein the second strand angle is approximately positive/negative 15 degrees to 30 degrees, and wherein the bottom surface layer has a bottom surface strand density that is less than the core layer strand density; and a first cover layer adjacent to the bottom surface layer wherein the first cover layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a third strand angle defined by an average deviation from a longitudinal axis of the first cover layer wherein the third strand angle is less than the first strand angle and the second strand angle. 7. The oriented strand board panel of claim 6 further comprising: a second cover layer adjacent to the top surface layer wherein the second cover layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a fourth strand angle defined by an average deviation from a longitudinal axis of the second cover layer wherein the fourth strand angle is less than the first strand angle and the second strand angle. 8. The oriented strand board panel of claim 6 wherein the third strand angle is in a range from zero degrees to positive/negative fifteen degrees. 9. The oriented strand board panel of claim 6 wherein the wood-based strands have a length in a range from 2 inches to 8 inches. 10. The oriented strand board panel of claim 6 wherein the bottom surface layer has more strands than the first cover layer. 11. The oriented strand board panel of claim 1, wherein the first cover layer has a first cover layer strand density that is less than the top surface strand density. 12. The oriented strand board panel of claim 1, further comprising a second cover layer on the bottom surface layer. 13. The oriented strand board panel of claim 12, wherein the second cover layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a fourth strand angle defined by an average deviation from a longitudinal axis of the second cover layer. 14. The oriented strand board panel of claim 12, wherein the second cover layer has a second cover layer strand density that is less than the top surface strand density. 15. The oriented strand board panel of claim 6, wherein the first cover layer has a first cover layer strand density that is less than the bottom surface strand density. 16. The oriented strand board panel of claim 6, further comprising a second cover layer on the top surface layer. 17. The oriented strand board panel of claim 16, wherein the second cover layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a fourth strand angle defined by an average deviation from a longitudinal axis of the second cover layer. 18. The oriented strand board panel of claim 16, wherein the second cover layer has a second cover layer strand density that is less than the bottom surface strand density.

이 특허에 인용된 특허 (58) 인용/피인용 타임라인 분석

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이 특허를 인용한 특허 (2) 인용/피인용 타임라인 분석

Lawson, Eric N.; Ou, Nian-hua; Peek, Brian M., Wood composite material containing strands of differing densities.
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Lawson, Eric N.; Ou, Nian; Peek, Brian M., Wood composite material containing strands of differing densities.
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[미국특허] Oriented strand board panel having improved strand alignment and a method for making the same 원문보기

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[미국특허] Oriented strand board panel having improved strand alignment and a method for making the same 원문보기

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