Title:
EVALUATION METHOD OF RUBBER MATERIAL
Document Type and Number:
Japanese Patent JP2017042978
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an evaluation method for evaluating a correlation between an equivalent vulcanization amount and a crosslinking density with high accuracy.SOLUTION: A evaluation method includes a first step of obtaining a rubber block formed of a vulcanized rubber by vulcanizing an unvulcanized rubber housed in a housing chamber by using a metal mold having a pair of members capable of forming the housing chamber of which depth varies along a length direction by combining, a second step of calculating an equivalent vulcanization amount based on temperature-time curves prepared for the respective measurement points, by preparing temperature-time curves by measuring temperatures during vulcanization in a plurality measurement points located on a median line in the depth direction of the housing chamber, and a third step of measuring a crosslinking density of a vulcanized rubber formed at respective measuring points by providing to a crosslinking density measurement test by sampling a vulcanized rubber containing each of the plurality of measuring points as a test piece from the rubber block that was taken out of the housing chamber and quenched.SELECTED DRAWING: Figure 1
Inventors:
NAKANO SHINYA
Application Number:
JP2015166322A
Publication Date:
March 02, 2017
Filing Date:
August 26, 2015
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
B29C33/42; G01N33/44
Attorney, Agent or Firm:
Kengo Oka
Sumitomo Norio
Kuroyoshi Murohashi
Hiroshi Kasakawa
Kei Someya
Yukari Imamura
Hiroomi Nakao
Sumitomo Norio
Kuroyoshi Murohashi
Hiroshi Kasakawa
Kei Someya
Yukari Imamura
Hiroomi Nakao