EP0167455A2
Expired / Lapsed
EP
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Vibration damping composite laminate
Assignee: JFE Steel Corp
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Filing: 1985-06-28
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Granted: —
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Expires: 2005-06-28
Abstract
Abstract Disclosed is a vibration damping composite laminate of the type comprising a viscoelastic polymer composition layer interposed between two layers of metal, which is high in the damping effectiveness and can readily be spot-welded to metal structures. Essentially the polymer composition is a blend of a polyvinyl acetal resin and particulate carbon which amounts to 10-80 wt% of the composition, on condition that the ratio of the mean particle size of the particulate carbon to the thickness of the polymer composition layer is from 0.5 to 1.7. Optionally the polymer composition may further comprise a polyolefine resin and/or a plasticizer.
Inventors
- 👤 Masatoshi Shinozaki
- 👤 Yoshihiro Matsumoto
- 👤 Yoshiki Aoyagi
- 👤 Kazuhisa Kojima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 06:28
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/082; B32B15/18; B32B27/00; B32B27/18; B32B27/22; B32B27/30; B32B7/00; B32B7/02; F; F16; F16F; F16F9/00; F16F9/30; F16F9/306; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; B32B2264/00; B32B2264/10; B32B2264/107; B32B2264/108; B32B2307/00; B32B2307/10; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/30; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31692
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
A vibration damping composite laminate comprising: two layers of a metal in parallel arrangement: and a layer of a viscoelastic polymer composition which is closely interposed between the two metal layers and comprises a polyvinyl acetal resin and particulate carbon which amounts to 10 to 80 wt% of the polymer composition, the ratio of a mean particle size of said particulate carbon determined by using the Rosin-Rammler's distribution equation to the thickness of the polymer composition layer being in the range from 0.5 to 1.7.
Claim 2
Dependent Claim
85 words
A vibration damping composite laminate comprising: two layers of a metal in parallel arrangement: and a layer of a viscoelastic polymer composition which is closely interposed between the two metal layers and comprises a polyvinyl acetal resin and particulate carbon which amounts to 10 to 80 wt% of the polymer composition, the ratio of a mean particle size of said particulate carbon determined by using the Rosin-Rammler's distribution equation to the thickness of the polymer composition layer being in the range from 0.5 to 1.7.
Claim 3
Dependent Claim
18 words
A composite laminate according to claim 1, wherein said ratio is in the range from 0.8: to 1.2.
Claim 4
Dependent Claim
26 words
A composite laminate according to claim 1, wherein said polyvinyl acetal resin is selected from the group consisting of polyvinyl butyral resin and polyvinyl formal resin.
Claim 5
Dependent Claim
40 words
4:. A composite laminate according to claim 1, wherein said polyvinyl acetal resin is in the range from 300 to 5000 in average degree of polymerization and in the range from 50 to 85 mol% in the degree of acetalization.
Claim 6
Dependent Claim
21 words
A composite laminate according to claim 1, wherein said particulate carbon amounts to 20 to 60 wt% of the polymer composition.
Claim 7
Dependent Claim
34 words
A composite laminate according to claim 1, wherein said polymer composition further comprises not more than 100 parts by weight of a polyolefine resin per 100 parts by weight of said polyvinyl acetal resin.
Claim 8
Dependent Claim
32 words
A composite laminate according to claim 6, wherein the amount of said polyolefine resin is not more than 50 parts by weight per 100 parts by weight of said polyvinyl acetal resin.
Claim 9
Dependent Claim
34 words
8:. A composite laminate according to claim 6, wherein said polyolefine resin is selected from the group consisting of polyethylene, polypropylene and copolymers of ethylene with an a-olefine having 3 to 10 carbon atoms.
Claim 10
Dependent Claim
49 words
A composite laminate according to claim 6, wherein said polyolefine resin is a modified polyolefine obtained by grafting an unsaturated carboxylic acid or its anhydride to a polyolefine selected from the group consisting of polyethylene, polypropylene and copolymers of ethylene with an α-olefine having 3 to 10 carbon atoms.
Claim 11
Dependent Claim
32 words
A composite laminate according to claim 1, wherein said polymer composition further comprises not more than 200 parts by weight of a plasticizer per 100 parts by weight of said polyvinyl acetal.
Claim 12
Dependent Claim
33 words
A composite laminate according to claim 10, wherein the amount of said plasticizer is in the range from 5 to 60 parts by weight per 100 parts by weight of said polyvinyl acetal.
Claim 13
Dependent Claim
13 words
A composite laminate according to claim 1, wherein said metal is a steel.
Claim 14
Dependent Claim
42 words
A composite laminate according to claim 1, wherein each layer of said metal has a thickness not smaller than 0.01 mm, the thickness of the polymer composition layer being not smaller than 1/20 of the thickness of each layer of said metal.
Claim 15
Dependent Claim
19 words
A composite laminate according to claim 1, wherein said two layers of said metal have substantially the same thickness.
Claim 16
Dependent Claim
18 words
A composite laminate according to claim 1, wherein said two layers of said metal are different in thickness.
References Cited (Backward Citations)
No citation records indexed.
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