JPS5769505A - Rubber sheet for turntable - Google Patents
Rubber sheet for turntableInfo
- Publication number
- JPS5769505A JPS5769505A JP14499880A JP14499880A JPS5769505A JP S5769505 A JPS5769505 A JP S5769505A JP 14499880 A JP14499880 A JP 14499880A JP 14499880 A JP14499880 A JP 14499880A JP S5769505 A JPS5769505 A JP S5769505A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- hardness
- rubber sheet
- polynorbornane
- 000pts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
PURPOSE: To obtain the titled rubber sheet which has superior vibration absorption characteristics and superior reproduction of ultra-low frequency range, by vulcanizing a rubber composite made essentially of polynorbornane having specific hardness and repulsive resilience.
CONSTITUTION: A rubber composite obtained by mixing 20W2,000pts.wt. factice (B) and a 50W2,000pts.wt. softening agent (e.g., castor oil) (C) with a 100pts.wt. rubber component containing ≥50wt% polynorbornane (A) is formed into a disk having 0.1W5mm projections 3 coaxially and in close contact over the surface while lines 4 of the projections decrease in height gradually in the order of an innermost line 4a and outward lines 4bW4g, and then the disk is vulcanized to obtain a turntable rubber sheet which has <1° hardness by an A type durometer and ≥15° hardness by an F type rubber durometer, ≥40% repulsive resilience, 0.1W50kg/ cm2 tensile strength, 100W1,000% elongation percentage, and 0.8W1.3 specific gravity.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14499880A JPS5769505A (en) | 1980-10-15 | 1980-10-15 | Rubber sheet for turntable |
US06/285,102 US4370371A (en) | 1979-11-20 | 1980-11-18 | Rubber disc for a record player turntable |
AU65722/80A AU532870B2 (en) | 1979-11-20 | 1980-11-18 | Rubber sheet for turntable |
DE19803049878 DE3049878A1 (en) | 1979-11-20 | 1980-11-18 | RUBBER SHEET FOR TURNTABLE |
EP19800902182 EP0041072B1 (en) | 1979-11-20 | 1980-11-18 | Rubber sheet for turntable |
PCT/JP1980/000282 WO1981001481A1 (en) | 1979-11-20 | 1980-11-18 | Rubber sheet for turntable |
NL8020426A NL8020426A (en) | 1979-11-20 | 1980-11-18 | RUBBERVEL FOR A TURNTABLE. |
KR1019800004812A KR830001562B1 (en) | 1980-10-13 | 1980-12-17 | Rubber Sheet for Turntables |
GB8110983A GB2074778B (en) | 1979-11-20 | 1981-04-08 | Rubber sheet for turntable |
CA000377415A CA1163569A (en) | 1980-10-13 | 1981-05-12 | Rubber sheet for turntable |
IT21767/81A IT1135835B (en) | 1980-10-13 | 1981-05-18 | Rubber sheet for record player turntable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14499880A JPS5769505A (en) | 1980-10-15 | 1980-10-15 | Rubber sheet for turntable |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5769505A true JPS5769505A (en) | 1982-04-28 |
Family
ID=15375085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14499880A Pending JPS5769505A (en) | 1979-11-20 | 1980-10-15 | Rubber sheet for turntable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5769505A (en) |
-
1980
- 1980-10-15 JP JP14499880A patent/JPS5769505A/en active Pending
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