[특허]Fibrous insulation and process for making the same

Fibrous insulation and process for making the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	D21H-005/18
출원번호	US-0409620 (1973-10-25)
발명자 / 주소	Blome James C. (Bridgeton MO) Goodbrake Chris J. (Vandalia IL) O\Brien Marvin Edward (Jackson MS) Vance Macy W. (St. Louis MO)
출원인 / 주소	McDonnell Douglas Corporation (St. Louis MO 02)
인용정보	피인용 횟수 : 41 인용 특허 : 0

초록 ▼

An insulative material comprises a random network of ceramic fibers and a binder for holding the fibers together. In addition, it may include a filler material composed of hollow ceramic spheres which locate at the interstices of the fibrous network and increase the strength of the network. The insulative material can withstand extremely high temperatures and thermal shock without degradation, has an extremely low density, has excellent insulating properties, and has reasonably high compressive strength. The material is formed by making a slurry which contains the ceramic fibers, with or without the filler, and the binder; felting the slurry; subjecting the felt so formed to microwave energy for drying; and firing the dried felt at 2300°-3200°F. to increase its strength.

대표청구항 ▼

A process for making a fibrous insulation, said process comprising forming a slurry containing by weight about 2.1% to about 7.5% ceramic fibers, about 18% to about 22% colloidal silica binder which is capable of forming a ceramic when fired, not more than about 5.4% ceramic filler, and about 60% to about 80% water; felting the slurry to form a soft felt in which the fibers cross at junction points; precipitating the binder onto the fibers and filler by mixing into the slurry hexamethylenetetramine which generates ammonia at between about 160°F. and 205°F. and heating the soft felt to between about 160°F. and 205°F. for about 60 to about 120 minutes to generate the ammonia so as to elevate the pH of the liquid within the felt to at least about 6.5 and thereby cause the binder to concentrate and gel at the junction points, said heating to between 160°F. and 205°F. being in an enclosure to prevent excessive evaporation of liquid from the soft felt; thereafter subjecting the soft felt to microwave energy to dry the felt; and firing the felt to increase its strength. an insulative material comprising: ceramic fibers disposed in a random network such that some of the fibers cross over other fibers, creating interstices in the network; a granular ceramic filler with the granules thereof being in the interstices of the network, whereby the crossing fibers and the fillers form junction points in the network; and a binder concentrated at the junction points of the fibrous network and holding the fibers and the granules of the filler in place, the binder being silica; the insulative material having a density between approximately 10 lbs./ft.3 and 38 lbs./ft.3 with the fibers constituting between approximately 20% and 80% of the weight of the material, the binder between approximately 10% and 40%, and the granular filler not more than approximately 50%.

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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

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Fibrous insulation and process for making the same 원문보기

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이 특허를 인용한 특허 (41)

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