Several Quality Detection Methods Of Rubber How To Identify Rubber Quality 1.Resistance To Media Weight Gain Experiment The Finished Product Can Be Sampled, Soaked In One Or Several Selected Media, and Weighed After A Certain Temperature Time, And The Material Type Can Be Inferred According To The Rate Of Change Of Weight And Hardness For Example, When Soaked In 100 Degree Oil For 24 Hours, Nbr, Fluorine Glue, Eco, Cr Mass, And Hardness Change Rate Is Very Small, While Nr, Epdm, and Sbr Weight Gain More Than Double And Hardness Change Greatly, Volume Expansion Is Very Obvious. 2. Hot Air Aging Experiment Take A Sample From The Finished Product And Put It In The Aging Box For One Day To Observe The Phenomenon After Aging. Can Be Graded Aging Gradually Heating Up. For Example, Cr, Nr, And Sbr Will Break Brittle At 150 Degrees, While Nbr And Epdm Have Elasticity. At 180 Degrees, Ordinary Nbr Will Be Brittle, And At 230 Degrees, Hnbr Will Also Be Brittle. Nitrogen Glue And Silica Gel Still Have Good Elasticity. 3. Combustion Method Take A Few Samples And Burn Them In The Air. Observe The Phenomenon. Generally speaking, Fluorine Glue, Cr, Csm From The Fire Breath, Even Burning Flame Is Much Smaller Than The General Nr, Epdm. Of Course, If You Look Closely, The Color And Smell Of The Burning State Can Also Give Us A Lot Of Information. For Example, Nbripvc Is Used With Glue. When There Is Fire, The Fire Splashes Randomly, Which Seems To Be Like Water. When It Is Out Of Fire, The Smoke Is Thick And The Eyes Have Sour Taste. It Is Important To Note That Sometimes Added Flame Retardants But Do Not Contain Halogen Gum Will Also Self-extinguish From The Fire, This Needs To Be Further Inferred By Other Means. 4. Measure The Specific Gravity Use An Electronic Scale Or Analytical Balance, Accurate To 0.01 Grams, Plus A Cup Of Water, and A Hair Can Be. Generally speaking, The Proportion Of Fluorine Glue Is The Largest, Above 1.8, and Cr Eco Is Also More Than 1.3, The Proportion Is Obviously Larger and Can Be Considered As this Glue 5. Low-Temperature Method Take A Sample From The Finished Product And Create A Suitable Low-Temperature Environment With Dry Ice And Alcohol. Soak The Sample In A Low-Temperature Environment For 2-5 Minutes, At The Selected Temperature Feel Soft And Hard Degree, Such As -40 Degrees, The Same High Temperature And Oil Resistance Is Very Good Silicone And Fluorine Rubber Contrast, Silicone Is Soft.
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