A few definitions . . .

Textiles: Material made from yarn which are brought together to produce a drapable sheet of fabric

Yarn: Generic term for a continuous strand of textile fiber

Thread: General term for the yarn used in weaving or knitting

Count: Number of yarn per unit of length (generally inches or centimeters) in each direction of the fabric

Polyester: Man-made fiber made of a chain of molecule blending PVA (Polyvinyl Acetate) and PVC (Polyvinyl Chloride)

Nylon: Man-made fiber made of a chain of molecule -NH-CO (Nitrogen Hydrogen - Carbon Oxygen)

Tricot: As opposed to woven where the yarn is "laced" by passing over and under each other, the tricot assembles the yarn in a continuous fashion with a continuous loops process

Denier: Unit to measure the size or weight of a yarn - 100 denier yarn is a yarn that weighs 100 g per 9000 yards

Tex Decitex: The international system equivalent of the denier,the tex measures the weight of a yarn - 1000 dtex is 1000 g per 10 000 m.

Surface Tension: Intermolecular forces acting on the molecules at the free surface of a liquid. Surface tension affects the degree to which a liquid can wet a material (i.e., the lower the surface tension, the more easily the liquid wets a material surface).

Surrogate Microbe: As defined in ASTM F1671:2003, "a micro organism which is used to act as a stimulant for other micro organisms which are pathogenic to humans."

Viscosity: Resistance of a fluid to flow.

Laminate: Material of two or more layers bonded to one another.

Penetration: Movement of matter, on a non molecular level, through porous materials, closures, seams, or imperfections (e.g. pinholes) in a protective product.

Reinforced Area: Region of some surgical drapes or protective apparel in which the base material has been supplemented with one or more plies of the same or a different material for the purpose of enhancing or modifying the performance of the area (e.g., increasing strength, increasing resistance to liquid penetration, and/or providing absorptive qualities).

Strike-through: Passage of a liquid that could contain micro organisms through a barrier product, including its seams and/or points of attachment.

Barrier Properties: Ability of a protective product to resist the penetration of liquids and liquid borne micro organisms.

Body Fluid: Liquid produced (secreted or excreted) by the body.

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