[특허]Thin-layer lignocellulose composites having increased resistance to moisture and methods of making the same

Thin-layer lignocellulose composites having increased resistance to moisture and methods of making the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B27N-005/00
출원번호	US-0048672 (2011-03-15)
등록번호	US-8679386 (2014-03-25)
발명자 / 주소	Clark, Randy Jon Davis, Walter B. Alexander, Jonathan Phillip
출원인 / 주소	JELD-WEN, inc.
대리인 / 주소	Stoel Rives LLP
인용정보	피인용 횟수 : 0 인용 특허 : 163

초록 ▼

A method to produce thin-layer lignocellulosic composites, such as wood-based doorskins, that exhibit substantial resistance to moisture is disclosed. In an embodiment, the method includes the steps of forming a mixture including a refined lignocellulosic fiber, wax, and an organic isocyanate resin. The mixture is initially pressed to form a loose mat. Subsequently, the mat is pressed between two dies at an elevated temperature and pressure to further reduce the thickness of the mat and to promote the interaction of the resin with the lignocellulosic fibers. In an embodiment, a release agent is included as part of the fiber mixture, or sprayed onto the surface of the mat. The thin-layer lignocellulosic composites of the present invention exhibit strong surface strength, high adhesiveness, and a 50% reduction in linear expansion and thickness swelling upon exposure to a high moisture environment as compared to thin-layer composites that do not include the isocyanate resin.

대표청구항 ▼

1. A method of producing a door skin, comprising: forming a composite mixture comprising: wood fiber, an organic isocyanate resin, and a release agent;forming the mixture into a loose mat having at least 0.1 grams of the release agent per square foot of the mat;pressing the mat between two dies at an elevated temperature and pressure and for a sufficient time to allow the isocyanate resin to interact with the wood fiber to form the door skin, the door skin having a thickness of between about 1 mm and 5 mm. 2. The method of claim 1, wherein pressing the mat comprises pressing the mat between two dies, wherein at least one die surface is coated with an anti-bonding agent comprising a ceramic layer, a silane, or a silicone, which is baked onto the die surface. 3. The method according to claim 2, wherein the anti-bonding agent has been baked onto the die surface at a temperature greater than 149° C. (300° F.). 4. The method according to claim 3, wherein the anti-bonding agent has been baked onto the die surface for between 1 to 4 hours. 5. The method according to claim 2, wherein the anti-bonding agent is present on the at least one die surface in a thickness ranging from 0.0127 mm to 0.254 mm (0.0005 to 0.010 inches). 6. The method according to claim 1, further comprising: exposing the composite mixture to the release agent prior to pressing the composite mixture between the dies, the release agent comprising an aqueous emulsion of surfactants and polymers added directly to the composite mixture as an internal release agent prior to forming the mixture into a loose mat, in an amount ranging from 0.5 to 8 weight percent of the mixture. 7. The method according to claim 1, wherein the composite mixture includes 80% to 95% by weight of wood fiber having a moisture content of between 7% and 20% by weight. 8. The method according to claim 1, wherein the composite mixture further comprises up to 2% by weight of wax. 9. The method according to claim 1, wherein the temperature used for pressing the composite mixture between the dies ranges from 121° C. (250° F.) to 204° C. (400° F.). 10. The method according to claim 1, further comprising applying to the surface of the loose mat at least 0.1 grams of the release agent per square foot of the mat.

이 특허에 인용된 특허 (163)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Thin-layer lignocellulose composites having increased resistance to moisture and methods of making the same 원문보기

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Thin-layer lignocellulose composites having increased resistance to moisture and methods of making the same 원문보기

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