The Relationship Between Porosity and Barrier Effectiveness of Some Shell Fabrics Used in Protective Apparel

MG McCord; RL Barker; K Birla

doi:10.1520/STP14453S

SYMPOSIA PAPER Published: 01 January 2000

STP14453S

The Relationship Between Porosity and Barrier Effectiveness of Some Shell Fabrics Used in Protective Apparel

Source

The porosity of twenty-two fabric samples was evaluated using image analysis. The relationship between the optical porosity and vapor penetration was investigated using a permeation test apparatus. A model was derived based on Whelan's equation for the resistance of fabric to diffusion of vapor, and the model was fit to the penetration data. The model fit the data fairly well, and may be used for some fabrics to predict the amount of vapor penetration under a null pressure gradient.

Author Information

McCord, MG

North Carolina State University, Raleigh, NC

Birla, K

Vijay Chemical Industries, Thane, INDIA

Barker, RL

North Carolina State University, Raleigh, NC

Shipping & Handling

Domestic Shipping

Domestic orders are delivered via United Parcel Service (UPS) or United States Postal Service (USPS). Transit times average 3 to 5 business days. Please be aware that UPS will not deliver packages to Post Office Boxes.

Domestic Rush Orders

Please Contact Us.

International Standard Shipping

International orders are delivered via courier post services which can be either a postal service, courier service, or a combination of both. Standard Service is untraceable. Please allow 4-7 weeks for delivery.

International Expedited Shipping

Please Contact Us.

Please be aware that carriers will not deliver packages to Post Office Boxes. Because of the variability of customs processes and procedures in different countries, ASTM International cannot guarantee transit times to international destinations. Customs duty and taxes are the responsibility of the consignee.

Shipping & Handling charges follow the rate schedule, below:

Order Total	Shipping & Handling Fee (US Domestic)
Up to $50.00	$18.72
$50.01 to $100.00	$20.80
$100.01 to $150.00	$29.52
$150.01 to $250.00	$39.09
$250.01 to $500.00	$56.25
$500.01 to $750.00	$76.42
$750.01 to $1000.00	$93.15
$1000.01 to $1500.00	$121.27
$1500.01 to $2500.00	$158.38
$2500.01 to $4999.00	$209.04
$5000.00 to higher	FREE

Order Total	Shipping & Handling Fee (International)
Up to $50.00	$68.72
$50.01 to $100.00	$70.80
$100.01 to $150.00	$79.52
$150.01 to $250.00	$89.09
$250.01 to $500.00	$106.25
$500.01 to $750.00	$126.42
$750.01 to $1000.00	$143.15
$1000.01 to $1500.00	$171.27
$1500.01 to $2500.00	$208.38
$2500.01 to $4999.00	$259.04
$5000.00 to higher	FREE

Shipping and Handling charges are approximate. Additional charges may be incurred if your order requires multiple shipments. This does not apply to complete sets and sections.

Reprints and Permissions

Reprints and copyright permissions can be requested through the
Copyright Clearance Center

Details

Developed by Committee: F23

Pages: 297–311

DOI: 10.1520/STP14453S

ISBN-EB: 978-0-8031-5434-6

ISBN-13: 978-0-8031-2869-9

The Relationship Between Porosity and Barrier Effectiveness of Some Shell Fabrics Used in Protective Apparel

Author Information

Related

Reprints and Permissions

Details