JPS5769505A - Rubber sheet for turntable - Google Patents

Rubber sheet for turntable

Info

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
Application number
JP14499880A
Other languages
Japanese (ja)
Inventor
Shutaro Nakahira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HOUYUU GOMME KK
HOUYUU GOMU KK
Original Assignee
HOUYUU GOMME KK
HOUYUU GOMU KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HOUYUU GOMME KK, HOUYUU GOMU KK filed Critical HOUYUU GOMME KK
Priority to JP14499880A priority Critical patent/JPS5769505A/en
Priority to US06/285,102 priority patent/US4370371A/en
Priority to AU65722/80A priority patent/AU532870B2/en
Priority to DE19803049878 priority patent/DE3049878A1/en
Priority to EP19800902182 priority patent/EP0041072B1/en
Priority to PCT/JP1980/000282 priority patent/WO1981001481A1/en
Priority to NL8020426A priority patent/NL8020426A/en
Priority to KR1019800004812A priority patent/KR830001562B1/en
Priority to GB8110983A priority patent/GB2074778B/en
Priority to CA000377415A priority patent/CA1163569A/en
Priority to IT21767/81A priority patent/IT1135835B/en
Publication of JPS5769505A publication Critical patent/JPS5769505A/en
Pending legal-status Critical Current

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  • 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
JP14499880A 1979-11-20 1980-10-15 Rubber sheet for turntable Pending JPS5769505A (en)

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)

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