US4623571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cushioning member
Assignee: Teijin Ltd
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Filing: 1985-03-29
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Granted: 1986-11-18
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Expires: 2005-03-29
Abstract
Abstract A cushioning member comprising a cushioning layer, a heat insulating layer, and a dress covering is provided. The heat insulating layer is a laminate comprising (A) a flame-proofing layer and (B) a reinforcing layer, wherein the mainfibers of the flame-proofing layer (A) have a melting point of at least 300° C., a specific gravity not higher than 1.6 g/cm 3 , and a limiting oxygen index (LOI) of at least 33 and the main fibers of the reinforcing layer (B) have a limiting oxygen index (LOI) smaller than 33 but not smaller than 25, a specific gravity not higher than 1.6 g/cm 3 , a tensile strength of at least 3.2 g/d, and a toxicity test value of at least 10. The cushioning member has a light weight and an easy moldability and also has heat insulating and flame-proofing characteristics capable of satisfying the fireproof regulations of the Federal Aviation Administration.
Inventors
- 👤 Ryuzo Yamamoto
- 👤 Kihei Mori
- 👤 Yorihiko Omoto
- 👤 Hidehito Iai
- 👤 Toru Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:04
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/08; A; A47; A47C; A47C27/00; A47C27/14; A47C27/15; A47C31/00; A47C31/001; B32B5/022; B32B7/00; B32B7/02; B32B2305/00; B32B2305/08; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/50; B32B2307/54; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S5/00; Y10S5/954; Y10T; Y10T428/00; Y10T428/23; Y10T428/27; Y10T428/31504; Y10T428/31551; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/15; Y10T442/184; Y10T442/195; Y10T442/30; Y10T442/3325; Y10T442/335; Y10T442/60; Y10T442/647; Y10T442/651
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
182 words
A cushioning member comprising a cushioning layer, a heat insulating layer and a dress covering, said heat insulating layer being a laminate comprising (A) a flame-proofing layer and (B) a reinforcing layer, wherein the main fibers of the flame-proofing layer (A) have a melting point of at least 300° C., a specific gravity not higher than 1.6 g/cm 3 , and a limiting oxygen index (LOI) of at least 33 and the main fibers of the reinforcing layer (B) have a limiting oxygen index (LOI) smaller than 33 but not smaller than 25, a specific gravity not higher than 1.6 g/cm 3 , a tensile strength of at least 3.2 g/d, and a toxicity test value of at least 10, said toxicity test value being the time (minutes) required for a mouse to die when the smoke generated by burning the fiber at 700° C. at an air feed rate of 11.4 l/min at an oxygen concentration of 21% by volume in the fed air is introduced into a box having a volume of 125 l in which the mouse is confined.
Claim 2
Dependent Claim
182 words
A cushioning member comprising a cushioning layer, a heat insulating layer and a dress covering, said heat insulating layer being a laminate comprising (A) a flame-proofing layer and (B) a reinforcing layer, wherein the main fibers of the flame-proofing layer (A) have a melting point of at least 300° C., a specific gravity not higher than 1.6 g/cm 3 , and a limiting oxygen index (LOI) of at least 33 and the main fibers of the reinforcing layer (B) have a limiting oxygen index (LOI) smaller than 33 but not smaller than 25, a specific gravity not higher than 1.6 g/cm 3 , a tensile strength of at least 3.2 g/d, and a toxicity test value of at least 10, said toxicity test value being the time (minutes) required for a mouse to die when the smoke generated by burning the fiber at 700° C. at an air feed rate of 11.4 l/min at an oxygen concentration of 21% by volume in the fed air is introduced into a box having a volume of 125 l in which the mouse is confined.
Claim 3
Dependent Claim
32 words
A cushioning member according to claim 1 wherein the main fibers of the flame-proofing layer (A) have a specific gravity not higher tha 1.46 and an LOI value of at least 40.
Claim 4
Dependent Claim
32 words
A cushioning member according to claim wherein the main fibers of the reinforcing layer (B) have a specific gravity not higher than 1.46 and a tensile strength of at least 4.0 g/d.
Claim 5
Dependent Claim
21 words
A cushioning member according to claim 1 wherein each of the flame-proofing layer and the reinforcing layer comprises a non-woven fabric.
Claim 6
Dependent Claim
23 words
A cushioning member according to claim 1 wherein said laminate of the flame-proofing layer are formed and the reinforcing layer by mechanical means.
Claim 7
Dependent Claim
43 words
A cushioning member according to claim 1 wherein the flame-proofing layer and the reinforcing layer have basic weights of 10 to 700 g/m 2 and at least one of these two layers has a basic weight of at least 30 g/m 2 .
Claim 8
Dependent Claim
43 words
A cushioning member according to claim 1 wherein the flame-proofing layer and the reinforcing layer have basic weights of 30 to 500 g/m 2 and at least one of these two layers has a basic weight of at least 50 g/m 2 .
Claim 9
Dependent Claim
20 words
The cushioning member of claim 5 wherein said laminate is prepared by interlacing the flameproofing layer and the reinforcing layer.
References Cited (Backward Citations)
US4463465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |