METHOD FOR JUDGING HARDNESS OF ULTRAVIOLET CURING RESIN COVERING OPTICAL FIBER

Title:

METHOD FOR JUDGING HARDNESS OF ULTRAVIOLET CURING RESIN COVERING OPTICAL FIBER

Document Type and Number:

Japanese Patent JPH063299

Kind Code:

A

Abstract:

PURPOSE: To easily and precisely judge the hardness of an ultraviolet curing resin covering an optical fiber within a short time.

CONSTITUTION: The temperature-thermal decomposition heating value curve of an optical fiber covered with an ultraviolet curing resin by a differential calorimeter or differential scanning calorimeter, or the temperature-linear expansion coefficient curve by a heat mechanical analyzing device is determined. The glass transition point obtained from the curve is compared with a predetermined standard sample whose hardness is known, whereby the hardness is judged.

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Inventors:

INOUE NAOYA
CHIBA MINORU
SHIONO TAKEO

Application Number:

JP16267592A

Publication Date:

January 11, 1994

Filing Date:

June 22, 1992

Export Citation:

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Assignee:

SHOWA ELECTRIC WIRE & CABLE CO

International Classes:

C03C25/10; G01N25/02; G02B6/44; (IPC1-7): G01N25/02; C03C25/02; G02B6/44

Domestic Patent References:

JPH0363557A	1991-03-19
JPH0353152A	1991-03-07
JPS5910056U	1984-01-21
JPS62297749A	1987-12-24
JPS6390746A	1988-04-21

Attorney, Agent or Firm:

Saichi Suyama (1 person outside)

Next Patent: METHOD, SENSOR UNIT AND DEVICE FOR MEASURING THERMAL CHARACTERISTIC OF PIPE