EP0138557A2
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EP
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Vibration-damping material
Assignee: Nippon Steel Corp
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Filing: 1984-10-09
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Granted: —
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Expires: 2004-10-09
Abstract
Abstract A vibration-damping material with excellent workability consists of two metal plates and a vibration-damping layer of a thermoplastic resin interposed between the two metal plates, in which the vibration-damping layer of a thermoplastic resin consists of a film as a middle layer and a polyolefin type resin (B) provided on both sides of the film as an upper and lower layer, the film as the middle layer being composed of (1) at least one resin (A) selected from the group consisting of polyolefin type resins and ionomer resins each having a modulus of elasticity in shear at 20°C of 3 x 10 9 to 1 x 10 7 dyne/cm 2 , a percentage of elongation at 20°C of 50% or above and a peak temperature of dissipation factor (tan 6) of -120°C to 80°C or (2) a resin mixture of the resin (A) and a synthetic rubber having a percentage of elongation at 20°C of 100% or above and a peak temperature of dissipation factor (tan δ) of -120°C to 50°C, and the polyolefin type resin (B) having a modulus of elasticity in shear at 20°C larger than that of the resin (A), a percentage of elongation at 20°C of 10% or above, a peak temperature of dissipation factor (tan δ) of -40°C to 180°C and a bonding strength toward the metal plates at 20°C and 180°C-peeling of 3 kg/cm or above.
Inventors
- 👤 Nobuo Fukushima
- 👤 Yoshihiko Kitagawa
- 👤 Kiyohiko Nakae
- 👤 Yoshiaki Togawa
- 👤 Kozo Kotani
- 👤 Toshitsugu Kikuchi
- 👤 Seiichi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 15:15
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/308; B32B27/32; B32B27/322; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; B32B2307/00; B32B2307/10; B32B2307/50; B32B2307/56; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31826; Y10T428/31833; Y10T428/31837; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/3192; Y10T428/31924
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
229 words
A vibration-damping material consisting of two metal plates and a vibration-damping layer of a thermoplastic resin interposed between the two metal plates, in which the vibration-damping layer of a thermoplastic resin consists of a film as a middle layer and a polyolefin type resin (B) provided on both sides of the film as an upper and lower layer, the film as the middle layer being composed of (1) at least one resin (A) selected from the group consisting of polyolefin type resins and ionomer resins each having a modulus of elasticity in shear at 20°C of 3 x 10 9 to 1 x 10 7 dyne/cm 2 , a percentage of elongation at 20°C of 50% or above and a peak temperature of dissipation factor (tan 6) of -120° to 80°C or (2) a resin mixture of the resin (A) and a synthetic rubber having a percentage of elongation at 20°C of 100% or above and a peak temperature of dissipation factor (tan 6) of -120° to 50°C, and the polyolefin type resin (B) having a modulus of elasticity in shear at 20°C larger than that of the resin (A), a percentage of elongation at 20°C of 10% or above, a peak temperature of dissipation factor (tan 6) of -40° to 180°C and a bonding strength toward the metal plates at 20°C and 180°-peeling of 3 kg/cm or above.
Claim 2
Dependent Claim
229 words
A vibration-damping material consisting of two metal plates and a vibration-damping layer of a thermoplastic resin interposed between the two metal plates, in which the vibration-damping layer of a thermoplastic resin consists of a film as a middle layer and a polyolefin type resin (B) provided on both sides of the film as an upper and lower layer, the film as the middle layer being composed of (1) at least one resin (A) selected from the group consisting of polyolefin type resins and ionomer resins each having a modulus of elasticity in shear at 20°C of 3 x 10 9 to 1 x 10 7 dyne/cm 2 , a percentage of elongation at 20°C of 50% or above and a peak temperature of dissipation factor (tan 6) of -120° to 80°C or (2) a resin mixture of the resin (A) and a synthetic rubber having a percentage of elongation at 20°C of 100% or above and a peak temperature of dissipation factor (tan 6) of -120° to 50°C, and the polyolefin type resin (B) having a modulus of elasticity in shear at 20°C larger than that of the resin (A), a percentage of elongation at 20°C of 10% or above, a peak temperature of dissipation factor (tan 6) of -40° to 180°C and a bonding strength toward the metal plates at 20°C and 180°-peeling of 3 kg/cm or above.
Claim 3
Dependent Claim
16 words
A vibration-damping material according to Claim 1, wherein the resin (A) is an ethylene-vinyl acetate copolymer.
Claim 4
Dependent Claim
16 words
A vibration-damping material according to Claim 1, wherein the resin (A) is an ethylene-acrylic acid copolymer.
Claim 5
Dependent Claim
20 words
A vibration-damping material according to Claim 1, wherein the resin (A) is a saponification product of an ethylene-vinyl acetate copolymer.
Claim 6
Dependent Claim
15 words
A vibration-damping material according to Claim 1, wherein the synthetic rubber is an isobutylene-isoprene copolymer.
Claim 7
Dependent Claim
54 words
A vibration-damping material according to any preceding Claim, wherein the resin (B) is a modified polyolefin obtained by modifying a crystalline polyolefin (C) with at least one monomer (D) selected from unsaturated carboxylic acids and their anhydrides, or a mixture of said modified polyolefin with an amorphous polymer (E) and/or an ethylenic polymer (F).
Claim 8
Dependent Claim
22 words
A vibration-damping material according to Claim 6, wherein the crystalline polyolefin (C) in the resin (B) is a linear low density polyethylene.
Claim 9
Dependent Claim
34 words
A vibration-damping material according to Claim 6, wherein the crystalline polyolefin (C) in the resin (B) is a polyolefin selected from the group consisting of low, medium and high density polyethylenes and a polypropylene.
Claim 10
Dependent Claim
31 words
A vibration-damping material according to Claim 6, wherein the monomer (D) in the resin (B) is a compound selected from the group consisting of acrylic acid, methacrylic acid and maleic anhydride.
Claim 11
Dependent Claim
23 words
A vibration-damping material according to Claim 6, wherein the amorphous polymer (E) in the resin (B) is a (meth)acrylic acid ester type polymer.
Claim 12
Dependent Claim
28 words
A vibration-damping material according to Claim 6, wherein the amorphous polymer (E) in the resin (B) is a 1,2-polybutadiene, a polyisobutylene, an acrylonitrile-styrene copolymer or a petroleum resin.
Claim 13
Dependent Claim
38 words
A vibration-damping material according to Claim 6, wherein the ethylenic polymer (F) in the resin (B) is at least one polymer selected from the group consisting of an ethylene homopolymer, an ethylene-a-olefin copolymer and an ethylene-unsaturated ester copolymer.
Claim 14
Dependent Claim
25 words
A vibration-damping material according to any preceding Claim, wherein the middle layer has a thickness of 20 to 95% based on the total film thickness.
Claim 15
Dependent Claim
24 words
A vibration-damping material according to Claim 13, wherein the middle layer has a thickness of 80 to 90% based on the total film thickness.
Claim 16
Dependent Claim
19 words
A vibration damping material according to any preceding Claim, wherein the total film thickness is 30 to 100 ω,
Claim 17
Dependent Claim
17 words
A vibration-damping material according to Claim 15, wherein the total film thickness is 30 to 60 u.
Claim 18
Dependent Claim
30 words
A vibration-damping material according to Claim 1, wherein the ratio of the synthetic rubber in the resin mixture with the resin A is 10 to 80% based on the mixture.
Claim 19
Dependent Claim
6 words
A vibration-damping material according to Claim
Claim 20
Dependent Claim
24 words
17, wherein the ratio of the synthetic rubber in the resin mixture with the resin A is 25 to 60% based on the mixture.
Claim 21
Dependent Claim
24 words
17, wherein the ratio of the synthetic rubber in the resin mixture with the resin A is 25 to 60% based on the mixture.
Claim 22
Dependent Claim
32 words
A vibration-damping material according to Claim 6, wherein the content of the amorphous polymer (E) and/or the ethylenic polymer (F) in the mixture (the resin B) is 0 to 80% by weight.
References Cited (Backward Citations)
No citation records indexed.
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