IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0023023
(2011-02-08)
|
등록번호 |
US-8388807
(2013-03-05)
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발명자
/ 주소 |
- Sealey, James E.
- Fields, Brent A.
|
출원인 / 주소 |
- International Paper Company
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
79 |
초록
▼
A partially fire resistant cellulosic fiber thermal insulation material from a fibrous web of unrefined virgin softwood and hardwood provides fibers which provides an R-value (as measured by the ASTM C518 test) of at least about 3, and a wood ash fire retardant component present in and/or on the fib
A partially fire resistant cellulosic fiber thermal insulation material from a fibrous web of unrefined virgin softwood and hardwood provides fibers which provides an R-value (as measured by the ASTM C518 test) of at least about 3, and a wood ash fire retardant component present in and/or on the fibrous web in an amount of at least about 1.5% by weight of the fibrous web and sufficient to impart at least partial fire resistance (as measured by the ASTM E970-08A test) to the fibrous web. Also, a process for preparing this at least partially fire resistant thermal insulation material.
대표청구항
▼
1. An article comprising a fire resistant cellulosic fiber thermal insulation material comprising: a fibrous web providing an R-value (as measured by the ASTM C518 test) of at least about 3 and comprising: from about 5 to about 85% unrefined virgin softwood pulp fibers by weight of the fibrous web;
1. An article comprising a fire resistant cellulosic fiber thermal insulation material comprising: a fibrous web providing an R-value (as measured by the ASTM C518 test) of at least about 3 and comprising: from about 5 to about 85% unrefined virgin softwood pulp fibers by weight of the fibrous web; andfrom about 15 to about 85% unrefined virgin hardwood pulp fibers by weight of the fibrous web; andat least about 1.5% by weight of the fibrous web of a wood ash fire retardant component in and/or on the fibrous web and sufficient to impart at least partial fire resistance (as measured by the ASTM E970-08A test) to the fibrous web. 2. The article of claim 1, wherein the fibrous web comprises from about 10 to about 60% softwood pulp fibers and from about 40 to about 90% hardwood pulp fibers. 3. The article of claim 2, wherein the fibrous web comprises from about 15 to about 30% softwood fibers and from about 70 to about 85% hardwood fibers. 4. The article of claim 1, wherein the fibrous web provides an R-value in the range of from about 3 to about 4.5. 5. The article of claim 4, wherein the fibrous web provides an R-value in the range of from about 3.4 to about 4.2. 6. The article of claim 1, wherein the fibrous web has a basis weight about 850 gsm or less and a moisture content of less than about 20%. 7. The article of claim 6, wherein the fibrous web has a basis weight about 500 gsm or less and a moisture content of less than about 12%. 8. The article of claim 1, wherein the fibrous web includes one or more debonder surfactants in an amount (based on the fibrous web) of from about 0.05 to about 0.35% by weight. 9. The article of claim 8, wherein the fibrous web includes one or more debonder surfactants in an amount (based on the fibrous web) of from about 0.75 to about 0.15% by weight. 10. The article of claim 1, wherein the wood ash fire retardant component is present in and/or on the fibrous web in an amount of from about 1.5 to about 20%, by weight of the fibrous web. 11. The article of claim 10, wherein the wood ash fire retardant component is present in and/or on the fibrous web in an amount of from about 1.5 to about 5%, by weight of the fibrous web. 12. The article of claim 10, wherein the wood ash fire retardant component comprises one or more of: calcium carbonate; potash alum (potassium aluminum sulfate); sodium carbonate; clay; or talc. 13. The article claim 1, wherein the fibrous web includes one or more other fire retardants in an amount sufficient to pass the ASTM E970-08A test. 14. The article of claim 13, wherein the other fire retardants are one or more of: borate fire retardants, phosphorous fire retardants, halogenated fire retardants, or metal oxide fire retardants, and wherein the other fire retardants are present in and/or on the fibrous web in an amount (based on the fibrous web) of from about 15 to about 25% by weight. 15. The article of claim 14, wherein the other fire retardants are present in and/or on the fibrous web in an amount (based on the fibrous web) of from about 15 to about 18% by weight. 16. The article of claim 14, wherein the other fire retardants comprise one or more borate fire retardants. 17. A process for making the article of claim 1, comprising the following steps: a. providing a fibrous web providing an R-value (as measured by the ASTM C518 test) of at least about 3 and comprising: from about 5 to about 85% unrefined virgin softwood pulp fibers by weight of the fibrous web; andfrom about 15 to about 95% unrefined virgin hardwood pulp fibers by weight of the fibrous web; andb. treating the fibrous web with a wood ash fire composition comprising a wood ash fire retardant component such that the wood ash fire retardant component is present in and/or on the fibrous web in an amount of at least about 1.5%, by weight of the fibrous web and sufficient to provide a cellulosic fiber thermal insulation material which is at least partially fire resistant (as measured by the ASTM E970-08A test),to produce the article of claim 1. 18. The process of claim 17, wherein the fibrous web of step (a) is formed from a pulp slurry, and wherein step (b) is carried out by adding the wood ash fire retardant composition to a pulp slurry. 19. The process of claim 18, wherein step (b) is carried out by adding a portion of total wood ash fire retardant component to the pulp slurry, and by adding the remaining portion of the total wood ash fire retardant component to the formed fibrous web. 20. The process of claim 19, wherein step (b) is carried out by adding from about 5 to 100% of total wood ash fire retardant component to the pulp slurry, and by adding from 0 to about 95% of the total wood ash fire retardant component to the formed fibrous web. 21. The process of claim 20, wherein step (b) is carried out by adding from about 10 to about 90% of total wood ash fire retardant component to the pulp slurry, and by adding from about 10 to about 90% of the total wood ash fire retardant component to the formed fibrous web. 22. The process of claim 18, wherein step (b) is carried out by using a size press to add the remaining portion of the total wood ash fire retardant component to the formed fibrous web. 23. The process of claim 18, wherein step (b) is carried out by spraying the remaining portion of the total wood ash fire retardant component on the formed fibrous web. 24. The process of claim 17, wherein step (b) is carried out by treating the fibrous web with the wood ash fire retardant composition such that the wood ash fire retardant component is present in and/or on the fibrous web in an amount of from about 1.5 to about 20%, by weight of the fibrous web. 25. The process of claim 24, wherein step (b) is carried out by treating the fibrous web with the wood ash fire retardant composition such that the wood ash fire retardant component is present in and/or on the fibrous web in an amount of from about 1.5 to about 5%, by weight of the fibrous web. 26. The process of claim 25, wherein step (b) is carried out by treating the fibrous web with a wood ash fire retardant composition wherein the wood ash fire retardant component comprises one or more of: calcium carbonate; potash alum (potassium aluminum sulfate); sodium carbonate; clay; or talc. 27. The process of claim 17, which comprises the further following step: (c) treating the fibrous web with one or more other fire retardants in an amount sufficient to pass the ASTM E970-08A test. 28. The process of claim 27, wherein step (c) is carried by treating the fibrous web with one or more of: borate fire retardants, phosphorous fire retardants, halogenated fire retardants, or metal oxide fire retardants, in an amount (based on the fibrous web) of from about 15 to about 25% by weight. 29. The process of claim 28, wherein step (c) is carried by treating the fibrous web with one or more of: borate fire retardants, phosphorous fire retardants, halogenated fire retardants, or metal oxide fire retardants, in an amount (based on the fibrous web) of from about 15 to about 18% by weight. 30. The process of claim 28, wherein step (c) is carried by treating the fibrous web with one or more borate fire retardants. 31. The process of claim 17, wherein the fibrous web of step (a) comprises from about 10 to about 60% softwood pulp fibers and from about 40 to about 90% hardwood fibers. 32. The process of claim 31, wherein the fibrous web of step (a) comprises from about 15 to about 30% softwood pulp fibers and from about 70 to about 85% hardwood fibers. 33. The process of claim 17, which comprises the further following step: (d) treating the fibrous web with one or more debonder surfactants. 34. The process of claim 33, wherein step (d) is carried out by treating the fibrous web with the debonder surfactants in an amount (based on the fibrous web) of from about 0.05 to about 0.35% by weight. 35. The process of claim 34, wherein step (d) is carried out by treating the fibrous web with the debonder surfactants in an amount (based on the fibrous web) of from about 0.075 to about 0.15% by weight. 36. The process of claim 17, which comprises the further following step: (e) treating the fibrous web with one or more trivalent metal cations. 37. The process of claim 36, wherein step (e) is carried out by treating the fibrous web with alum.
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