Synthetic Fibers Flashcards
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Synthetic Fibers Flashcards

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Questions and Answers

What are synthetic fibers?

  • Natural fibers found in nature
  • Fibers that are only found in animals
  • Manufactured fibers that are polymers made up of total chemical compounds (correct)
  • Fibers that only come from plants
  • Which of the following are properties common to synthetic fibers? (Select all that apply)

  • Heat Sensitive (correct)
  • Hydroscopic (correct)
  • Excellent Abrasion Resistance (correct)
  • Strong absorbency
  • What can be changed in synthetic fibers to improve performance?

    Chemical formulation

    At which stages can blending occur?

    <p>Fiber stage, yarn stage, fabric stage, finish stage</p> Signup and view all the answers

    When was nylon introduced?

    <p>1939</p> Signup and view all the answers

    What is a common use for nylon?

    <p>Stockings</p> Signup and view all the answers

    What is polyester primarily made from?

    <p>Petroleum derivatives and alcohol</p> Signup and view all the answers

    What is a characteristic of polyester?

    <p>Wrinkle resistant</p> Signup and view all the answers

    What is olefin derived from?

    <p>Petroleum and propylene</p> Signup and view all the answers

    What are common uses for olefin?

    <p>Industrial fabrics, indoor/outdoor carpeting, and specialized garments</p> Signup and view all the answers

    Acrylic is highly flammable.

    <p>True</p> Signup and view all the answers

    Five 2-liter bottles can be turned into a _____?

    <p>t-shirt</p> Signup and view all the answers

    What does the term 'chameleon fiber' refer to?

    <p>Polyester</p> Signup and view all the answers

    What helps improve dye absorption in acrylic fibers?

    <p>A few other chemicals</p> Signup and view all the answers

    Which synthetic fiber is derived from acrylonitrile?

    <p>Acrylic</p> Signup and view all the answers

    Study Notes

    Synthetic Fibers

    • Synthetic fibers are man-made polymers created from chemical compounds, categorized by their chemical composition.

    Properties of Synthetic Fibers

    • Heat-sensitive and thermoplastic, impacting their durability under heat.
    • Uniformly structured under microscopic view; resembling glass rods with striations.
    • Hydrophobic nature results in low absorbency and water resistance.
    • Exhibits electrostatic properties, influencing cling and static buildup.
    • Highly resistant to abrasion and chemicals, including resistance to insects and fungi.
    • Tends to pill over time, affecting aesthetic appearance.
    • Oleophilic, showing a strong affinity for oils and grease.
    • Resilient and wrinkle-resistant, retaining shape after washing.
    • Generally, average to low specific gravity, making them lightweight.

    Engineering Synthetic Fibers

    • Chemical formulations can be altered to enhance performance characteristics.
    • Cross-section design can mimic natural fibers, examples include micro-fibers.
    • Coloration occurs during fiber production, ensuring colorfastness.
    • Various finishing agents can be integrated in the solution, like flame retardants and moth repellents.
    • Fiber texture can be modified using crimping techniques.
    • Fiber length varies from continuous filament to staple length by cutting strands.

    Blending Processes

    • Blending can happen at different stages: fiber, yarn, fabric, and finishing.
    • Fiber stage includes creating bicomponent or matrix blends.
    • Yarn stage allows twisting multiple fibers into a single yarn.
    • Fabric stage can involve a mix of fibers in the warp and filling.
    • Finished products may see application of metallic pigments or selective fiber burnouts.

    Nylon

    • Developed by Dupont in 1939 as a synthetic long-chain polyamide fiber.
    • Melt-spun process utilized; forms include monofilament, multifilament, and staple fibers.
    • Production involves polymerization of chemicals and water, followed by melting and extruding nylon chips.

    Nylon Uses

    • Commonly used in stockings, swimwear, bags, carpets, fishing lines, ropes, tents, and parachutes.

    Care of Nylon

    • Machine washable and tumble dried at low temperature; fabric softener recommended to mitigate static cling.

    Polyester

    • Introduced by Dupont in 1953 as a long-chain polymer from petroleum derivatives.
    • Frequently texturized for bulk and volume; known as a chameleon fiber due to its versatility.
    • Wrinkle-resistant and available in both filament and staple lengths with some odor retention issues.

    Polyester Characteristics

    • Low absorbency but resistant to stains and chemicals.
    • Exhibits poor dyeability and heat conductivity but can be heat set for form stability.

    Polyester Care

    • Machine washable and tumble dried at low temp; immediate removal from dryer prevents wrinkles.

    Polyester Uses

    • Widely employed in wrinkle-free clothing, carpets, fiberfill stuffing, and various household fabrics.

    Polar Fleece

    • Made from recycled polyester, such as soda bottles; quantity requirements demonstrate sustainability.
    • Examples include five bottles for a t-shirt and 200 bottles for sofa upholstery.

    Acrylic

    • Developed in the 1950s by Dupont and Monsanto, derived from acrylonitrile and various chemicals.
    • Serves as a wool substitute but is highly flammable and generally produced in staple length.

    Acrylic Uses

    • Commonly found in ropes, shoelaces, coats, jackets, blazers, sweaters, and blankets.

    Modacrylic

    • A modified version of acrylic introduced in 1949, designed to be less flammable.
    • Commonly used as a wool substitute, especially in fire-resistant applications.

    Modacrylic Uses

    • Utilized in fire resistant sleepwear, fake fur, wigs, carpets, and outdoor furniture textiles.

    Olefin (Polypropylene)

    • Developed by Hercules in 1961, consists of a long-chain polymer from propylene.
    • Lightweight with moisture-wicking capabilities but challenging to dye due to low melting point.

    Olefin (Polypropylene) Uses

    • Found in industrial fabrics, moisture barriers, indoor/outdoor carpeting, and specialized garment linings.

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    Description

    Explore the world of synthetic fibers with these flashcards. Learn their definitions, properties, and classifications as you delve into the characteristics of chemically-manufactured materials. Ideal for students studying textiles or materials science.

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