Industry Glossary - W

The yarn running lengthwise in a woven fabric. A group of yarns in long lengths and approximately parallel, put on beams or warp reels for further textile processing including weaving, knitting, twisting, dyeing, etc.

Chemicals applied to the warp yarn to improve strand integrity, strength and smoothness in order to withstand rigors of weaving.

the system of yarns running crosswise in a fabric. Also known as fill.

The degree and/or rate at which each individual filament is “wet” or encapsulated by the matrix polymer resin in a composite sheet. Relates to the ability of the polymer matrix resin system to move through the glass fiber bed and to attain complete encapsulation of each individual filament. A measure of the wetability of the sized glass fiber surface.

A process for forming a non-woven web from a water slurry on “papermaking’ equipment. Also known as “wet-laid” or “wet-formed”.

The degree and/or rate of encapsulation of the sized glass fiber bundles in a laminate. The rate and/or degree of which the polymer matrix resin system can flow through the bed of sized glass bundles or strands and encapsulate each bundle of filaments.

A term used to describe bundles of roving which are wider than most of the other bundles in the bed of chopped glass fibers. These usually contain 3 to 4 times as many filaments per bundle as do most of the other bundles in the roving. ().

Heavy fabrics woven from continuous filament in roving form. Usually in weights between 18-30 oz. per square yard.

Surface imperfection in laminated plastics that has the appearance of a crease or fold in one or more outer sheets of the paper, fabric, or other base, which has been pressed in. Also occurs in vacuum bag molding when the bag is improperly placed, causing a crease.