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Glossary of Terms

Polypropylene - A breathable material used for non-hazardous environments. Provides protection against dry particulates, paint, and light chemicals.

Tyvek - A material that provides protection in all kinds of industrial applications. Provides an excellent barrier in light splash situations, and dry particulates such as asbestos, lead dust and radioactive dusts. Also provides protection in food processing and painting.

Tyvek QC - Polyethylene coated. Provides excellent lightweight splash protection from many acids and other liquid chemicals, and pesticides.

PE Coated - A polyethylene coating which provides lightweight industrial chemical protection. Not suggested for use with extreme chemicals.

Tychem 9400 - A tough, durable, tear-resistant material which provides excellent protection against a broad range of chemicals.

Tychem SL - A lightweight fabric providing effective and economical protection against a broad range of industrial chemicals, including those used in agriculture and petroleum markets.

Vinyl Aprons, Hemmed - Made of high quality virgin vinyl resistant to acids, alkalis, solvents, chemicals, oils, fats, grease and salt. Provide reliable tear, abrasion and puncture resistance. Used in food processing, meat packing, assembly, restaurant work, and industrial maintenance.

Unhemmed Aprons - Identical to the above, but unhemmed. Used mainly with food processing, industrial maintenance, and other hygienic applications. Unhemmed are more economical.

Die-cut Aprons - Provide medium-duty splash protection and flexibility in industrial applications. Neck straps and tie straps are incorporated in this one-piece design making it even more economical.

Urethane Aprons - These aprons are lightweight, long lasting and very economical where water splash is likely. Ideal for food processing and heavy industrial abrasion areas.

PVC Aprons - Made from a thick 20 mil. PVC material. Used in rigorous work environments. Recommended for use in aircraft production, or battery manufacturing.

Hycar Aprons - Nitrile blend provides reliable abrasion and cut resistance for longer protection against oils, fats, chemicals, acids and grease. These rubber protective aprons can withstand the deteriorating effects of animal fats and greases while remaining flexible in cold environments.

Particulate Holdout - The filtration efficiency of a material, measured by the number of particulates per 100 that can be pulled through the material. Reported for 2 micron size particles.

Penetration Resistance - Material resistance to liquid penetration is measured using ASTM F903 - the outside surface of the material in question is exposed to the test chemical for one hour.

Permeation Resistance - ASTM F739 is used to measure the permeation resistance of materials. Permeation is the molecular movement of chemicals through a material. If exposure to chemical vapors is a concern, this data should be analyzed.

Tensile Strength - The force required to break a material apart by pulling it from opposing directions. Measured in pounds and is reported in two directions.

Burst Strength - The force required to break through a material when applied perpendicular to its surface area.

Tear Resistance - The force required to tear through a material once a tear has been initiated.

Puncture (or Snag) Resistance - The force required to puncture a material with a sharp probe, such as a nail.

Abrasion Resistance - Measurement of how quickly a material will wear through when rubbed against a coarse, sandpaper (simulated asphalt) surface.

Weight and Thickness - Material weights are reported in ounces per square yard and thickness in increments of 0.0001 inch (mils). Both material weight and thickness are indicators of garment bulk and comfort.

Air Permeability - The ability of a material to freely pass air, measured as the number of cubic feet that can be passed in a square foot of material. Non-breathable materials allow no air permeation. Note: Some materials may report zero air permeability, but may still have breathability.

Water Vapor Transmission - In this test, the rate in which a material allows transmission of water vapor is measured. The rate is reported as ounces of water that can pass through a square yard of material in one hour. The ability of a material to allow water vapor transmission is related to wearer comfort because body cooling occurs through the evaporation of sweat.

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