impermeable

(redirected from impermeability)
Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.

impermeable

(of a substance) not allowing the passage of a fluid through interstices; not permeable

Impermeable

Resistance to penetration by fluids or vapor through the material.

impermeable

[im′pər·mē·ə·bəl]
(science and technology)
Not permitting water or other fluid to pass through. Also known as impervious.

impermeable

Said of a soil whose particles are so closely spaced that the passage of water is either prevented or very slow.
References in periodicals archive ?
Penetration enhancers are the substances that facilitate the absorption of penetrant through the skin by temporarily diminishing the impermeability of the skin.
The pozzolonic property of RHA is not only effective in enhancing the strength of concrete, but also improves the impermeability of concrete.
Extensive usage of particulate fillers in many commercial polymers is for the enhancement in stiffness, strength, dimensional stability, toughness, heat distortion temperature, damping, impermeability, and cost reduction, although not all of these desirable features are found in any single filled polymer.
Other coating properties that they would like to see improved include impermeability to water and other solvents for galvanic couple resistance and the hydroscopic nature of fillers used in surface coatings.
His approach is rooted in the immemorial Iberian qualities of plainness, whiteness and impermeability, all unsentimentally reinterpreted for the modern age.
When impermeability is good, tires are said to run consistently at design specifications with minimum maintenance, and offer enhanced performance in terms of handling, cornering, rolling resistance and wear.
The development of halogenated butyl rubbers greatly extended the usefulness of butyl rubbers by providing faster curing rates, which enabled co-vulcanization with general-purpose tire rubbers used in carcass coat stocks such as natural rubber, styrene-butadiene rubber and butadiene rubber, without affecting the desirable impermeability and fatigue properties.
The safety of glass is primarily attributed to its two features: inertness and impermeability.
Butyl rubber is a specialty elastomer said to offer a unique blend of physical and chemical properties, including gas and moisture impermeability, low temperature flexibility, broad damping characteristics, heat and flex cracking resistance, and weathering and chemical resistance.
In another aspect, an elastomeric composition may have improved impermeability and have a permeation coefficient at 40[degrees]C of 160 cc*mm/([m.
Regular butyl is a copolymer made of isobutene and small amounts of isoprene and is distinguished by its high impermeability to gas and good resistance to heat, weather and ozone.
Although vital for normal brain function, blood-brain barrier impermeability presents a problem when treating malignant and degenerative disorders of the central nervous system, such as brain cancer, Alzheimer's and Parkinson's disease.