GB/T 2794-2022 Determination for viscosity of adhesives
1 Scope
This document specifies the method of determining the viscosity of adhesives using a single cylinder rotational viscometer, a cone-and-plate rotational viscometer, and a rotational rheometer.
This document is applicable to the determination for viscosity of adhesives.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2918 Plastics - Standard atmospheres for conditioning and testing
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 20740 Adhesive - Sampling
3 Terms and definitions
No terms and definitions are listed in this document.
4 Sampling
The sampling methods specified in GB/T 20740 shall apply.
5 Instruments and apparatus
5.1 Single cylinder rotational viscometer
Measuring precision: ±5%.
5.2 Cone-and-plate rotational viscometer
Measuring precision: ±5%.
5.3 Rotational rheometer
Measuring precision: ±5%.
5.4 Temperature control device
When the temperature of the temperature control device is set within 20°C to 50°C, the accuracy shall be kept constant at 0.2°C; when the temperature is below 20°C or above 50°C, the accuracy shall be kept constant at 0.5°C.
More accurate measurement requires higher accuracy (such as 0.1°C).
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Sampling
5 Instruments and apparatus
6 Sample conditioning
7 Test methods
8 Expression of results
9 Test report
