US6544622B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aramid honeycombs and a method for producing the same
Assignee: Showa Aircraft Industry Co Ltd
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Filing: 2000-10-11
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Granted: 2003-04-08
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Expires: 2020-10-11
Abstract
Abstract A novel aramid honeycombs 11 and a method therefor are provided, wherein aramid sheets 1 are used as the base material for forming cell walls 18 of the honeycombs 11. The aramid sheets 1 comprise para-aramid pulps 2, an amount of 40% by weight or less of para-aramid fibers 3 and a binder 4. Each of the aramid sheets 1 is calendered to produce pores 9, which extend from the outer surface to inside, with a porosity of 20% to 60%. Further, a reinforcing resin 10 is adhered to the cell walls 18 of the aramid sheets 1 and the pores are filled with the resin in an amount of 50% by volume based on the pore volume.
Inventors
- 👤 Kazuhiko Nomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:26
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/10; D21H13/20; D21H13/26; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31725; Y10T428/31739
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
Aramid honeycombs comprising an assembly having a plurality of hollow columnar cells separated by cell walls, wherein aramid sheets are used as a base material for said cell walls, said aramid sheets including para-aramid pulps as a main component, including a binder, and containing a plurality of pores, and wherein said cell walls formed by said aramid sheets are one of coated by and impregnated with a reinforcing resin, and said pores in said cell walls are filled with said resin.
Claim 2
Dependent Claim
81 words
Aramid honeycombs comprising an assembly having a plurality of hollow columnar cells separated by cell walls, wherein aramid sheets are used as a base material for said cell walls, said aramid sheets including para-aramid pulps as a main component, including a binder, and containing a plurality of pores, and wherein said cell walls formed by said aramid sheets are one of coated by and impregnated with a reinforcing resin, and said pores in said cell walls are filled with said resin.
Claim 3
Dependent Claim
15 words
Aramid honeycombs according to claim 1 , wherein said aramid sheets further include para-aramid fibers.
Claim 4
Dependent Claim
73 words
Aramid honeycombs according to claim 2 , wherein said para-aramid fibers include staple fibers of a staple or flock shape, and are used in an amount of 40% by weight or less of the total amount (100%) of said para-aramid pulps and said para-aramid fibers, and wherein said binder is used in an amount of 5% to 20% by weight to the total amount (100%) of said para-aramid pulps and said para-aramid fibers.
Claim 5
Dependent Claim
42 words
Aramid honeycombs according to claim 2 , wherein said pores each extend from a surface to a location inside of a respective one of said aramid sheets, and collectively provide said cell walls with a porosity of 20% to 60% by volume.
Claim 6
Dependent Claim
24 words
Aramid honeycombs according to claim 2 , wherein at least 50% of the total volume of said pores is filled with said reinforcing resin.
Claim 7
Dependent Claim
21 words
Aramid honeycombs according to claim 1 , wherein said cell walls are both coated by and impregnated with said reinforcing resin.
Claim 8
Dependent Claim
25 words
Aramid honeycombs according to claim 1 , wherein each said aramid sheet is a calendered sheet, said pores therein being a result of the calendering.
Claim 9
Dependent Claim
68 words
Aramid honeycombs according to claim 1 , wherein said aramid sheets further include para-aramid fibers, wherein said pores are dispersed within said cell walls, wherein said reinforcing resin coats and adheres to surfaces of said cell walls, and wherein said para-aramid pulps, said para-aramid fibers, said binder and said reinforcing resin are strong bonded to each other to form a strong three-dimensionally woven structure which is said assembly.
Claim 10
Dependent Claim
13 words
Aramid honeycombs according to claim 1 , wherein said binder is a resin.
Claim 11
Dependent Claim
31 words
Aramid honeycombs according to claim 1 , wherein said binder is one of a polyvinyl alcohol, a phenolic resin, an acrylate resin, a water-soluble thermosetting resin, and a water-soluble thermoplastic resin.
Claim 12
Dependent Claim
19 words
Aramid honeycombs according to claim 1 , wherein said para-aramid pulps are made from a nylon type resin material.
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| 3.5 Years (Year 4) | 2006-04-07 | 2006-10-07 | 2007-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-04-07 | 2010-10-07 | 2011-04-08 | $3760.00 | Window Closed / Lapsed |
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