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Data Analysis - Hardness Relaxation• The curve ofHardness Relaxationversus time isdisplayed and stored.• Regression line of thecurve in logarithmicaxes is calculatedand the relative anglecoefficient iscalculated.• Angle coefficient isan indicator of viscoelasticbehaviour andhas correlation withthe level of curing fora defined compound.This measure can beused for a quick andnon-distructive testfor moulding processcontrol.
Data Analysis - Hysteresis Curve (IRHD)After the standard irhd test the main load can be removed fromthe sample (only pre-load is kept on the sample) to check thehysteretic behaviour of the sample. The % of the positionrecovery of the indentor is calculated at the set test time.Positive correlation has been found between % finaldeformation and compression set results
Page 1: VKRT Seminar 10-02-2011Rubber Hardn
Page 5 and 6: Instrument Construction:About Hardn
Page 7 and 8: Gibitre Technology for irhdThe samp
Page 9 and 10: Gibitre Technology for irhdA High s
Page 11 and 12: Gibitre Products
Page 13 and 14: Automatic Shore and Irhd Units• T
Page 15 and 16: Rubber Samples
Page 17: Data Analysis - Hardness at set tim
Page 21 and 22: Studies and DevelopmentsInteresting
Page 23 and 24: Diaphragm centring device for O-rin
Page 25 and 26: Centring device for tubesThe device
Page 27 and 28: The test report refers to 10tests o
Page 29: Comparison of resultsThe possibilit
Page 32 and 33: Repeatability oftest resultsGibitre
Page 34 and 35: Requests for hardness testsat contr

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