Blocking point

ASTM D1146-00 Standard test method for blocking point of potentially adhesive layers. 

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Any inability to form haem in appropriate amounts will release the feedback control and the pathway will accelerate until the enzyme block point is reached, resulting in the accumulation of the precursors (ALA and PBG) and/or intermediates (porphyrinogens) up to the block point. 

D 1146 Test Method for Blocking Point of Potential Adhesive Layers... 

The wax blocking point is the lowest temperature at which film disruption occurs across 50% of the waxed paper surface when the test strips are separated. The picking point is the lowest temperature at which the surface film shows disruption. Blocking of waxed paper, because of the relatively low temperature at which it may occur, can be a major problem for the paper coating industry. The wax picking and blocking points indicate an approximate temperature range at or above which waxed surfaces in contact with each other are likely to cause surface film injury. 

Vertical profile measurement at mid point of block Point Block (22 stories)... 

The temperature at which a sample of wax either melts or solidifies from the solid or liquid state, respectively, depending on the ASTM test used. Low melting point generally indicates low viscosity, low blocking point, and relative softness. 

Figure 5. Ishikawa diagram of Pp from a functional block point of view...

Blocking point n. Lowest temperature at which two coated surfaces in mutual contact will tick together sufficiently to injure the surfaces permanently and/or prevent easy separation. Thus, blocking point is a major quality criterion for evaluating coating-grade petroleum waxes. 

Blocking Point of Potentially Adhesive Layers, Tbst for (D 1146)... 

Blocking point Bonding permanency Chemical reagents Cleavage... 

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