Quadripolymer

A polymer made from four distinct monomers.

Quality

1. The totality of features and characteristics of a product or service that bear on its ability to satisfy stated or implied needs. (See also colour quality, fibre quality index and lace quality.)
2. A term, usually combined with a number or name, used to identify textile products.3. A relative term used to indicate the perceived merits of similar products for the same end-use.

Quality assurance

To carry out all those planned and systematic actions necessary to provide adequate confidence that a product or service will satisfy given requirements for quality.

Quality control

The operational techniques and activities that are used to fulfil requirements for quality.

Quantitative analysis

Method of determining the proportion of different substances in a sample, usually on a mass basis, e.g., the proportions of each fibre type in a blend; the proportion of impurity in raw fibres.

Quarter

An abbreviation for a quarter of a yard (9 inches or 228.6 mm) used as a length unit in measuring the width of fabrics.

Quartz (fibre)

A fibre of high-purity silicon dioxide glass, produced from mineral quartz or quartz sand. (See also ceramic fibre and Classification Table, p.401.)
Note.. Although quartz is invariably crystalline, quartz fibres are not. For this reason, some authorities deprecate the use of this term, preferring 'fused silica fibres'.

Quartz Fiber

Pure silica that has been melted and drawn into glass-like fibers. Used for heat resistance and high dielectric strength.

Queen's cord, warp-knitted

A two-bar construction made with full-set threading in both guide bars. The lapping movement + of the back guide bar involves underlapping three or four needle spaces, while the front guide bar chains continuously on the same needle.

Quench

A cooling zone in which the temperature of melt-spun filaments is lowered very rapidly and/or at a controlled rate soon after extrusion. The two main types are generally referred to as waterquench and air-quench.

Quench Spacer

The “quiet” zone below the spinneret in which there is no quench airflow. Quench spacer distance is important in controlling fiber orientation and birefringence.

Quenching

The cooling of fiber filaments after extrusion by carefully controlled airflow. (See CROSSFLOW QUENCH INFLOW QUENCH and OUTFLOW QUENCH.)

Quetch

The nip rollers of a padding machine (see padding) or size box.
Note: The term is also used to describe the whole machine, particularly in yarn sizing (see sow box).

Quetsch

The nip rollers of a padding machine (see padding) or size box.

Quetscil

Primarily the container (trough, pan) of the size solution of a warp-sizing machine, often steam jacketed and/or provided with open or closed steam piping for heating the size solution.
Note 1: The term is also used loosely to indicate the assembly of trough, immersion, and sizingrollers of a slasher-sizing machine.
Note 2.. The tendency is to restrict the use of sow box to the above primary meaning, and the term quetsch to indicate the complete assembly. The use of the terms quetsch-box and quetsch-trough should be noted. (See also quetsch).