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  J | K | L
To access a listing of general textile terms, click on a letter above.
 
-J-

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Jet Clips?Mfg. by Jet-Clip Co.: Clips used in packaging of shirts, slacks, jeans, blouses, knit slacks, infants wear, knits, jackets, and heavy weight garments. (Registered trademark of Jet-Clip.)
   

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Kevlar?/a>: Spun thread of aramid fiber from DuPont. (Registered trademark of DuPont.) Kevlar has very good heat resistant properties and exceptionally high tensile strength. Kevlar is used in protective clothing used by fire fighters and police. Kevlar is not recommended for applications that required prolonged exposure to very high temperatures.  Also see Anefil?/font> Kevlar ?/font>.
King Spool: A thread cone that has a vertical tube with a horizontal base that is used for filament polyester and nylon threads and glaced cotton threads. King spools prevent the thread from sloughing under the cone base.
 
Knits: Fabrics that are constructed by interlooping adjacent yarns to form the fabric. Some common types of knit fabrics include: jersey, ribbed, tricot. (See Thread Application Guide on Knits.)
Knots: Used to join ends of yarn or thread together. Most textile companies used "weavers" knots, which are only three thicknesses. On most of A&E threads, we have replaced knots with air spices which are less than two thickness. Most knots will cause the thread to break but most air splices will sew through the needle without breaking.

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Lapping: A process used in the manufacturing of 100% cotton yarn where a number of ends of sliver are made into a lap or sheet for the combing process.
Laserbrite?/font>: A&E brand name for a multi-ply polyester thread.  Laserbrite threads are used for machine quilting, embroidery, and decorative applications.  (See Signature? Specialty Threads.)
Latch Tracking: See chain tacking.
Lockstitch (301 Stitch): A stitch that is formed with a needle thread and a bobbin thread that are inter-locked in the center of the seam being sewn. Even though the same amounts of needle and bobbin thread are consumed, the needle thread requires 5 to 7 times more tension than the bobbin thread. Some of the advantages of using a lockstitch in a seam include: the stitch is reversible, produces the tightest of all seams, uses the least amount of thread, can be used on multi-directional automated sewing machines, has a low seam profile.
Loop Strength: The strength when one strand of thread is looped with another strand and then broken. This strength test gives an indication of the brittleness of the fiber being tested. Most polyester sewing threads will have a loop strength of approximately 1.5 times the single-end breaking strength.
 
Looper: A stitch-forming device used on chainstitch, overedge and coverstitch sewing machines to form a stitch.
Looper Thread: Refers to the bottom thread used on chainstitch and coverstitch machines; and the threads that cover the edge of an overedge seam. Looper threads feed directly off the cone into the sewing machine eliminating bobbin changes.
Lubricity: Refers to the frictional characteristics of thread as it passes through the sewing machine and into the seam. Good lubricity characteristics will minimize thread breakage and enhance sewability. A thread with a fibrous or fuzzy surface will have superior lubricity characteristics.
Ludlow? Refers to a registered trademark of A&E.  See Specialty Engineered Yarn.
Lyocell?/a>: Refers to a regenerated cellulosic fiber developed for sewing Tencel? fabrics that are usually overdyed and enzyme washed.


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Over-Dyeing or Piece-Dyeing Assembled Garments: Describes considerations when selecting 100% cotton thread for assembled garments that are to be over-dyed or piece-dyed.

 
 
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Internet Sites

AATCC: American Association of Textile Chemist and Colorists. www.aatcc.org
ATMI: American Textile Manufacturing Institute.
www.atmi.org

North Carolina Center for Applied Textile Technology:  Part of the NC Community College System, NCCATT provides instruction in textile technology and related fields.
www.nccatt.org/home.asp

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