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Latex Mechanical Stability Testing |
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Latex Test Procedure Stirring is applied to the latex rubber at a constant of 14,000 rpm until the end point, or latex instability is reached. The approach to the end point is usually indicated by a drop in meniscus of the latex, loss of turbulence and a change in the sound of stirring action. The end point is determined by the first appearance of small pieces of coagulated rubber. This end point is confirmed by the presence of an increased amount of coagulated rubber after 15 seconds additional rotation. The end point in this case is the presence of approximately 1% of coagulum based on total solids. The mechanical stability value for a latex is expressed as the number of seconds elapsed from the start of the test to the end point. APPLICABLE STANDARDS
BS 6057 PART 3 SECTION 3.1 (ISO 35) and BS 6057 Part 3 Section 3.14 (ISO 2006)
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