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GB/T 2793-1995 English PDF (GBT2793-1995)

GB/T 2793-1995 English PDF (GBT2793-1995)

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GB/T 2793-1995: The method for determination of nonvolatile content of adhesives

This Standard specifies the equipment, test temperature, test procedure and test results for determination of nonvolatile content of adhesives. This Standard applies to adhesives that have obvious mass loss when heated to volatilize.
GB/T 2793-1995
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
Replacing GB 2793-81
Test method for nonvolatile content of adhesives
ISSUED ON: DECEMBER 20, 1995
IMPLEMENTED ON: AUGUST 01, 1996
Issued by: State Technical Supervision Bureau
Table of Contents
1 Subject content and scope of application ... 3
2 Principle ... 3
3 Equipment ... 3
4 Test temperature, test duration and sampling volume ... 3
5 Test procedure ... 4
6 Results presentation ... 4
7 Test report ... 4
Additional information: ... 5
Test method for nonvolatile content of adhesives
1 Subject content and scope of application
This Standard specifies the equipment, test temperature, test procedure and test results for determination of nonvolatile content of adhesives.
This Standard applies to adhesives that have obvious mass loss when heated to volatilize.
2 Principle
The nonvolatile content of adhesives is determined by heating the sample at a certain temperature for a certain period of time, and it is expressed as a percentage of the mass of the sample after heating and the mass of the sample before heating.
3 Equipment
3.1 Constant temperature blast oven: the temperature fluctuation is not more than ??2 ??C.
3.2 Thermometer: 0 ~ 150 ??C, the division value is 1 ??C.
3.3 Weighing container: a weighing bottle or aluminum foil dish with a diameter of 50 mm and a side height of 30 mm.
3.4 Analytical balance: the division value is 1 mg.
3.5 Dryer: a dryer containing color-changing silica gel.
4 Test temperature, test duration and sampling volume
4.1 Amino-based resin adhesives: the test temperature is 105 ?? 2 ??C, the test duration is 180 ?? 5 min, and the sampling volume is 1.5 g.
4.2 Phenolic resin adhesives: the test temperature is 135 ?? 2 ??C, the test duration is 60 ?? 2 min, and the sampling volume is 1.5 g.
4.3 Other adhesives: the test temperature is 105 ?? 2??C, the test duration is 180 ?? 5 min, and the sampling volume is 1.0 g.

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