US4749613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite fiber reinforced thermoplastic resin stampable sheet and bumper beam formed thereof
Assignee: JAPAN GMT CO Ltd
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Filing: 1986-12-18
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Granted: 1988-06-07
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Expires: 2006-12-18
Abstract
Abstract A composite fiber reinforced thermoplastic resin stampable sheet, which comprises laminates each composed of reinforcing fibers arranged in one direction and fiber mats and a thermoplastic resin incorporated in the laminates through impregnation, which stampable sheet is characterized by the fact that the proportion of the reinforcing fibers in the laminates is in the range of 30 to 80% by weight and the laminates are contained in a proportion in the range of 20 to 70% by weight and the thermoplastic resin is contained in a proportion in the range of 30 to 80% by weight respectively. A stampable beam is produced by forming the stampable sheet with a stampable device.
Inventors
- 👤 Toshio Yamada
- 👤 Ikuo Okubayashi
- 👤 Yukio Sato
- 👤 Shunpei Minagawa
- 👤 Masaru Koshimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:29
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B29; B29C; B29C43/00; B29C43/02; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/083; B32B27/00; B32B27/28; B32B27/286; B32B27/32; B32B27/34; B32B27/36; B32B5/02; B32B5/06; B32B5/28; B60; B60R; B60R19/00; B60R19/02; B60R19/03; B60R19/18; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0854; B29K2105/12; B29K2105/25; B29K2105/253; B29K2105/256; B29L; B29L2031/00; B29L2031/30; B29L2031/3044; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2262/0269; B32B2262/10; B32B2262/101; B32B2262/106; B32B2305/00; B32B2305/08; B32B2323/00; B32B2323/10; B32B2367/00; B32B2377/00; B32B2605/00; B32B2605/08; B60R2019/1806; B60R2019/1833; B60R2019/1853; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2902; Y10T442/00; Y10T442/60; Y10T442/643; Y10T442/682; Y10T442/684; Y10T442/688
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
93 words
A composite fiber reinforced thermoplastic stampable sheet comprising: laminates, each including reinforcing fibers arranged in one direction and contained in the range of 30 to 80% by weight relative to the laminate, and a swirled fiber mat disposed adjacent to the reinforcing fibers and joined to the reinforcing fibers by needling, said laminate being contained in the range of 20 to 70% by weight relative to the stampable sheet, and a thermoplastic resin incorporated in said laminates by impregnation in the range of 30 to 80% by weight relative to the stampable sheet.
Claim 2
Dependent Claim
93 words
A composite fiber reinforced thermoplastic stampable sheet comprising: laminates, each including reinforcing fibers arranged in one direction and contained in the range of 30 to 80% by weight relative to the laminate, and a swirled fiber mat disposed adjacent to the reinforcing fibers and joined to the reinforcing fibers by needling, said laminate being contained in the range of 20 to 70% by weight relative to the stampable sheet, and a thermoplastic resin incorporated in said laminates by impregnation in the range of 30 to 80% by weight relative to the stampable sheet.
Claim 3
Dependent Claim
42 words
A composite fiber reinforced thermoplastic resin stampable sheet according to claim 1, wherein said laminate has a plurality of layers of said reinforcing fibers and a plurality of layers of said mats superposed symmetrically in the direction of thickness of said laminate.
Claim 4
Dependent Claim
36 words
A composite fiber reinforced thermoplastic resin stampable sheet according to claim 2, wherein said laminate has said oomponent layers superposed in such a manner that two fiber mat layers form the outermost layers of the laminate.
Claim 5
Dependent Claim
26 words
A composite fiber reinforced thermoplastic resin stampable sheet according to claim 1, wherein said thermoplastic resin is polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, or polyphenylene sulfide.
Claim 6
Dependent Claim
23 words
A composite fiber reinforced thermoplastic resin stampable sheet according to claim 1, wherein said fibers are glass fibers, carbon fibers, or aramid fibers.
Claim 7
Dependent Claim
27 words
A composite fiber reinforced thermoplastic resin stampable sheet according to claim 1, wherein said reinforcing fibers are formed of unsplit strands each having 100 to 2,000 filaments.
Claim 8
Dependent Claim
41 words
A composite fiber reinforced thermoplastic resin stampable sheet according to claim 1, wherein said fiber mats are formed of strands each having 200 to 2,000 filaments in an unsplit form or in a form split into not more than 8 pieces.
Claim 9
Dependent Claim
26 words
A composite fiber reinforced thermoplastic resin stampable sheet according to claim 1, wherein said swirls have a diameter in the range of 150 to 800 mm.
Claim 10
Dependent Claim
13 words
A bumper beam formed of a composite fiber reinforced thermoplastic stampable sheet, comprising:
Claim 11
Dependent Claim
13 words
A bumper beam formed of a composite fiber reinforced thermoplastic stampable sheet, comprising:
Claim 12
Dependent Claim
89 words
laminates, each including reinforcing fibers arranged in the longitudinal direction of the bumper and contained in the range of 30 to 80% by weight relative to the laminate, and a swirled fiber mat disposed adjacent to the reinforcing fibers and joined to the reinforcing fibers by needling, said laminate being contained in the range of 20 to 70% by weight relative to the stampable sheet, and a thermoplastic resin incorporated in said laminates by impregnation in the range of 30 to 80% by weight relative to the stampable sheet.
Claim 13
Dependent Claim
89 words
laminates, each including reinforcing fibers arranged in the longitudinal direction of the bumper and contained in the range of 30 to 80% by weight relative to the laminate, and a swirled fiber mat disposed adjacent to the reinforcing fibers and joined to the reinforcing fibers by needling, said laminate being contained in the range of 20 to 70% by weight relative to the stampable sheet, and a thermoplastic resin incorporated in said laminates by impregnation in the range of 30 to 80% by weight relative to the stampable sheet.
Claim 14
Dependent Claim
48 words
A bumper beam according to claim 9, further comprising a fiber reinforced thermoplastic resin sheet patched to the stampable sheet at a required portion, said thermoplastic resin sheet and the stampable sheet being integrally joined together when the stampable sheet is formed by impregnation with the thermoplastic resin.
Claim 15
Dependent Claim
50 words
A bumper beam according to claim 10, wherein said thermoplastic resin sheet contains swirled fiber mats in the range of 20 to 70% by weight relative to the thermoplastic resin sheet, and a thermoplastic resin in the range of 30 to 80% by weight relative to the thermoplastic resin sheet.
Claim 16
Dependent Claim
24 words
A bumper beam according to claim 11, wherein said stampable sheet is formed under pressure of not lower than 100 Kg per square cm.
Claim 17
Dependent Claim
37 words
A bumper beam according to claim 10, further comprising a cover member situated outside the stampable sheet, said cover member being made of a resin, and a filler situated between the cover member and the stampable sheet.
Claim 18
Dependent Claim
129 words
A composite fiber reinforced thermoplastic stampable sheet comprising: at least two laminates, each including reinforcing fibers arranged in one direction and contained in the range of 30 to 80% by weight relative to the laminate, and a swirled fiber mat disposed adjacent to the reinforcing fibers and joined to the reinforcing fibers by needling, said laminate being contained in the range of 20 to 70% by weight relative to the stampable sheet, and a thermoplastic resin in the range of 30 to 80% by weight relative to the stampable sheet, said thermoplastic resin being incorporated in said laminates by impregnation so that after two resin sheets are disposed outside the laminates and a molten resin is placed between the two laminates, the laminates and resin are heated and pressed.
Claim 19
Dependent Claim
129 words
A composite fiber reinforced thermoplastic stampable sheet comprising: at least two laminates, each including reinforcing fibers arranged in one direction and contained in the range of 30 to 80% by weight relative to the laminate, and a swirled fiber mat disposed adjacent to the reinforcing fibers and joined to the reinforcing fibers by needling, said laminate being contained in the range of 20 to 70% by weight relative to the stampable sheet, and a thermoplastic resin in the range of 30 to 80% by weight relative to the stampable sheet, said thermoplastic resin being incorporated in said laminates by impregnation so that after two resin sheets are disposed outside the laminates and a molten resin is placed between the two laminates, the laminates and resin are heated and pressed.
References Cited (Backward Citations)
US4604319A
Cited
US4604319B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |