Textiles (Exam 2)

Which of these fibers is not a natural fiber?

Nylon

Generic names differentiate among manufactured and synthetic fibers based on

chemical composition

Which cross section below is most often used to create silk-like fabrics?

Trilobal

Which is the oldest method of spinning manufactured fibers?

Wet Spinning

Polymerization occurs during extrusion in

Melt Spinning

How are fibers delustered?

Add titanium dioxide

Stretching or drawing is done to increase which area of performance?

Tenacity

Which of these describes the smallest diameter?

Nanofibers

For all manufactured fibers, the shape of the spinneret hole controls the cross-sectional shape of the fiber.

False

Trade names and generic names are the same for all fibers.

False

Manufactured and synthetic fibers make possible many aspects of contemporary life.

True

Manufactured and synthetic fibers comprise less than 15% of the fibers used world wide today.

False

Antistatic compounds increase the electrical conductivity of fibers.

True

Shape memory fibers are also known as active polymers.

True

Cross-dyeable fibers are colored when they are extruded.

False

Nanofiber technology is used to produce some bicomponent-bigeneric fibers.

True

Parent fibers are fibers that have been modified for specific end uses.

False

Solution dyed fibers are modified to accept dye more readily.

False

Manufactured and synthetic fibers are bad for the environment.

False.

Rayon, Acetate, and Lyocell are

Manufactured regenerated cellulosic fibers.

Acetate is produced by

Dry spinning.

The greater absorbency of rayon compared to cotton can be explained by its

Lower degree polymerization.

A fiber commonly used in linings, but with the poorest abrasion resistance.

Acetate.

This fiber is most cotton-like manufactured fiber available.

Lyocell.

Which fiber is the most sensitive?

Acetate

With abrasion, this fiber has tendency to fibrillate.

Lyocell.

This fiber has low wet strength.

Rayon.

Two azlon fiber sources are

Soybeans and milk.

Azlon is a regenerated protein fiber.

True

Lyocell is a type of acetate.

False

Acetate is often used in lining fabrics because of its smooth, slick surface and ease of handling in sewing facilities.

True

Rayon is significantly heavier than cotton.

False

Lyocell is highly abrasion resistant and is used for work clothing and heavy duty interiors.

False.

This fiber tends to pick up color from soil and wash water.

Nylon.

Because of its low absorbency, this fiber is almost always colored by mass pigmentation.

Olefin

This fiber can be made to resemble most natural fibers and in appearance and is often used in blends.

Polyester

This fiber has excellent tenacity and abrasion resistance, but poor sunlight resistance.

Nylon.

This fiber is used to produce warm and lightweight wool-like fabrics.

Acrylic

Nylon is a(n)

Polyamide

Common characteristics of synthetic fibers include

All of these are correct.

Which method is used to produce nylon and polyester?

Melt spinning

Why is olefin used for thermal underwear and active sportswear?

Excellent wicking

The least absorbent of those listed below is

Olefin

This modification is common with melt-spun fibers because it is relatively inexpensive to do and produces significant changes in fiber properties.

Cross-sectional shape

Acrylic and wool are related chemically.

False

Nylon is the lightest of synthetic fibers.

False

Olefin is known for its high heat resistance.

False

Acrylic is often heat set to maintain its shape.

False

Nylon types are differentiated based on the number of carbon atoms in the diamine or acid used in its production.

True

Synthetic fibers are produced as filament and can be used as either staple or filament.

True