Clarity-enhancing agents

Clarity-enhancing agents provide a site within the polymer resin where crystallization may occur. This allows smaller crystallites to form. The smaller crystallites allow light to travel through the polymer medium and avoid diffraction of the light (4). The transparency of plastics can be measured according to a standard test method (5). 

Fining is a winemaking technique used to enhance sensory or clarity properties of the wines. Common fining agents used with North Coast white wines are bentonite (a clay), casein (milk protein), gelatin (animal protein),... 

U.S. 5641480 (1997) Vermeer (Lever Brothers) Heteroatom containing alkyl aldonamides and conditioning agents Enhanced stability and viscosity improved foam and clarity improved conditioning characteristics... 

Milliken Chemical manufactures Hyperform HPN-20E, a nucleating agent for use of polyethylene in blown film applications. The performance enhancements include improved clarity and physical properties, increased film throughput and reduced manufacturing costs. ... 

Silica enhances the crystallinity of a polymer (and hence reduces clarity) during ageing, by acting as a nucleating agent. This is moderated, however, when the stabilizers are bound to the silica. Distinct differences in the stabilization performance of anti-oxidants and HALSs when pre-bound to silica are attributed to the ability of the stabilizers to desorb selectively, depending on the environmental conditions. 

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