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O/W Emulsion Oil-in-water emulsion; oil is the internal phase,
water the external phase. An O/W emulsion is dispersible (dilutable) in
water, but not in oil. Oil Common shorthand in emulsion
technology referring to the water-insoluble phase of an emulsion. The
oil phase may be a fluorocarbon, silicone, or wax, in addition to or
instead of a conventional oil.
Opaque Not able to transmit light.
Open loop control A central system that monitors processing
parameters according to a preselected range.
Orange peel An uneven surface on a plastic part somewhat
resembling that of an orange peel.
Organosol Colloidal suspension in which the continuous phase
is an organic compound.
Orientation The molecular alignment in a plastic product.
Caused by flow or when the plastic is stretched, while hot. The
alignment of the chains of plastics.
OSHA Abbreviation for Occupational Safety and Health
Administration.
Osmosis Diffusion between two miscible fluids separated by a
permeable wall.
Oven dryer A method of drying resins using an oven.
Oxygen Index A flammability test based on the principle that a
certain volumetric concentration of oxygen is necessary to maintain
combustion of a specimen after it has been ignited. |
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