GB/T 36492-2018Method for determination of fiber shedding of mineral wool products (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the terms and definitions, principles, equipment, samples, test procedures and results of the method for determining the shedding of mineral wool products. Calculation and test report.

This standard applies to mineral cotton blankets, felts, boards and other products.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 4132 insulation materials and related terms

3 Terms and definitions

The following terms and definitions as defined in GB/T 4132 apply to this document.

4 Principle

The sample is placed in a prescribed laboratory environment for a period of time, passing through the sample collection tube of the sampling system in a certain direction, using the pump The suction and the filter paper in the sample collection tube collect the shedding. According to the difference between the quality of the filter paper and the adsorption area before and after the test, the amount of fiber shedding and the unit surface were calculated. The amount of fiber loss.

5 Instruments

5.1 Sampling system. voltage regulator, 0V~250V; fan, measuring range 20L/min~500L/min; sample collection tube, closed at one end, open end device Fixed filter paper retaining ring, inner diameter 102mm, length 380mm; slot, open on the sample tube, length 305mm, width 9mm, half at both ends Arc, see Figure 1; pressure gauge, range 0Pa ~ 1000Pa, accuracy grade 0.3%.

5.2 Balance. The division value is 0.001g.

5.3 Steel ruler. accuracy 1mm.

5.4 Qualitative filter paper. diameter (100 ± 1) mm, thickness (2.2 ± 0.1) mm, the rejection of 0.5µm particles is not less than 95%.