Fibers and Yarn Numbering

These flashcards cover key concepts related to elastomeric fibers, mineral fibers, and yarn numbering methods as discussed in the lecture.

Elastane

A type of elastomeric fiber made of at least 85% segmented polyurethane, known for its elasticity.

Mineral Fibers

Durable, rigid inorganic fibers that have higher melting points and better heat resistance. They are non-flammable but can be fragile.

Yarn Numbering

The process of classifying a thread or yarn based on the ratio of length and weight.

Direct System

A yarn numbering system where the ratio is between weight and length, often used for continuous fibers.

Indirect System

A yarn numbering system where the ratio is between length and weight, commonly applied to natural fibers.

Tex

A unit of measure in the direct system of yarn numbering, representing the weight in grams of 1,000 meters of yarn.

Denier

A direct system measurement where a lower number indicates finer yarn, based on the weight of 9,000 meters of yarn.

Metric titration

An indirect system of yarn numbering based on the weight of a fixed length of yarn.

Higher number in Indirect System

Indicates a finer yarn in the indirect yarn numbering system.

Continuous Fibers

Fibers that can be spun into yarns without interruption, such as silk, rayon, and nylon.