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The Gurley Model 4301 Permeometer
measures the porosity or air permeability of materials where air
flow is an important characteristic relative to their use. These
materials might be non-woven or woven textiles, filter and tissue
papers, facial tissues, paper and cloth felts, some types of
blotting, saturating and absorbent bag papers as well as wire
meshes.
The Permeometer is the standard
instrument for measuring high levels of air-permeability or
air-resistance as recommended in various test methods published
by ASTM, TAPPI and ASA. Its unit of measurement is cubic feet of
air per minute per square foot at 0.5 inches of water pressure
drop.
The Gurley Model 4301 is used
throughout the textile and general manufacturing industries and
is considered the instrument of choice due to its simplicity of
loading samples, ease of use, portability and life expectancy in
comparison to competitive models. Its procedure is
non-destructive and its design allows the testing of long
samples, up to six inches in from any edge.
- Quick & easy sample loading
- Rapid test cycle
- Excessive clamping pressure
unnecessary
- Portable & rugged design
- Complies with TAPPI, ASTM,
& ASA standards
- to determine ability for
material to pass air as a primary user requirement (such
as parachute cloth or vacuum cleaner bags).
- to evaluate materials used as
filters.
- aid in determining coolness or
warmth (as insulation values) in clothing.
- to predict probable coating
penetration.
- to measure retention of
filters, sizing or scratch after laundering or use.
- to aid in prediction of
water-resistant properties.
- to measure the effect of
treatments on porosity, density, nap or other material
properties.
- allows fast & easy
quantitative measurement of variables in production not
detectable by appearance or other methods.
- a non-destructive test to
accurately delineate & quantify differences in
materials and treatments.
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