What Is Sizing | Purpose Of Textile Sizing | Properties Of Sized Yarn

Sizing is the most important terms for weaving technology. After winding and warping, sizing of yarn is done during beam preparation. Sizing is done by applying various types of size materials on the yarn. During application of size materials steam is needed.

Sizing is a protective process. The process of applying a protective adhesive coating upon the yarns surface is called sizing. This is the most important operation to attain maximum weaving efficiency especially for blended and filament yarns. Sizing is called the heart of weaving.

Purpose of sizing: Sizing is done during beam preparation for getting some advantage of weaving. Sizing has lots of objects which are given below:

  • To improve the weave ability of warp yarn by making it more resistance to action of weaving like absorption, friction, tension etc.
  • To maintaining good fabric quality by reducing hairiness, weakness and by increasing smoothness and absorbency of yarn.
  • Tensile or breaking strength of cellulosic yarn is increased by sizing.
  • Elasticity of the yarn is also increased.
  • By adding size materials, yarn weight is increased.
  • To increase the frictional resistance.
  • Projected fibers are removed by this process.
  • To reduce electrostatic formation.

Properties of sized yarn: Generally size ingredients are used for warp yarn but sometimes it applies on weft yarn. Anyhow, by applying size ingredients on the yarn, following properties are obtained. Properties of sized yarns are given below:

  • Higher elasticity
  • Higher yarn strength
  • Lower flexibility
  • Lower extension or elongation
  • Lower frictional resistance
  • Increased smoothness
  • Less weakness
  • Insensible to over drying
  • Less hairiness

So, size ingredients change the physical properties of cellulosic fibers which is used for making a weavers beam.

27 thoughts on “What Is Sizing | Purpose Of Textile Sizing | Properties Of Sized Yarn

  1. Congratulations. This article has presented nearly all of the incorrect facts known about sizing and sized warp yarn.
    Jake Lark

  2. Hi I am leading supplier of sizing chemicals to the paper industry in India. I am looking forward to diversify. Can someone please brief me up about the sizing chemicals in Textile Industry?

  3. Hi, our company Laros is leading in italian textile sizing since 1986.
    Actually we are facing new researches related to Pva desizing, in order to safe water and energy, and new recipes pva free.
    We are very interested to stay in contact, exchange ideas and get suggestions to new markets.
    Our main foreign customers are in eastern europe (Rumania and Bulgaria), north Africa (Morocco, Tunisia, Egypt) , middle east (Turkey), India and pakistan.

  4. hi all,

    We are supplier of sizing agent for polyester filament and spun yarn. This is a product developed to meet the requirements from the customers and environment, which proved to be a perfect alternative of the PVA.
    It features of low viscosity, better penetrant property, easy to cook, good compatibility with other sizing, esay to be desizing and easily degradable.
    With the right application method, will reduce the cost for weaving as well as for water treatment, improve the weaving efficiency.

    1. dear sir, very nice too read your note,and i am very much interested to interacted with you, kindly give your contacting details to contact yopu,
      thanking you,
      with best regards,
      dinesh, textiletechnologist,

  5. waw;it is so nice but i will ask for all textile researcher to tell me how i reduce the reminant of un sized yarn on warper beam/ means on the creel of sizing machine?

  6. Hi All,

    We are supplier of polymer PVA in China for sizing factories. Welcome contact me for more details or talk to me on skype:selina0924.

  7. We are leading manufacturers of Textile Sizing and Processing Chemicals

    If you need Sizing Chemicals or recipes to be used , you can contact me

    Sizing Chemicals ::
    We have Acrylic Binders, Polyester Resin , Poly Vinyl Alcohol ,Synthetic Softener, Cationic Softener , Tallow , Thin boiling Starch , Modified Starch , One Shot, Glycerine , wax and film

    Processing Chemicals :: Poly vinyl Acetate , UF Resin , Formalein free Resin , Poly Vinyl Alcohol , Acrylamide , AMH

  8. Zydex industries are a pioneer of polyester sizing products globally. Its polyester resin sizing products form nano-level dispersion that results in outstanding filament-to-filament bonding. Its range of polyester products are designed to easily replace acrylic sizes requiring the same desizing processes that are typically used for acrylics such as caustic soda desizing instead of soda ash desizing recommended for other PET resins.

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