Crimp & Crimp Interchange

Crimp & Crimp Interchange

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  MY PROFILE Name :Abdullah Al Mahfuj. Department : Textile. Program : B Sc in Textile Engineering . ID : 142014007 Green University of Bangladesh .
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  Name of MyPresentation Crimp & Crimp Interchange
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  LETS START WITHMY JOURNEY....
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  Crimp • woven fabricmade of two sets of yarns - warp yarns and weft yarns. Warp and weft yarns are interlaced with each another and form fabric sheet. • When warp and weft yarn interlace in fabric they follow a wavy path. This waviness of yarn is called crimp.
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  Crimp% Crimp%: crimp percentage isdefined as the mean difference between the straightened thread length and the distance between the ends of the thread while in cloth which is expressed as a percentage. Where, l= Straightened thread length P= crimped length
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  Crimp ratio: Crimp ratiois the ratio of the yarn length to the fabric length produced from that yarn. Crimp amplitude: In cloth geometry, the term crimp amplitude is used. Crimp amplitude refers to the extent to which threads are defected from the central place of the cloth.
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  Take up% • Takeup % or crimp rigidity is a measure of the ability of a textured yarn to recover from stretch.  The difference between length of yarn in the fabric after weaving, expressed as a percentage of the length of the yarn before weaving, is called take up %. 100   L pL T
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  EFFECT OF CRIMPOF YARN ON FABRIC PROPERTIES  RESISTANCE TO ABRASION: With the increase of crimp %, the abrasion resistance will also increase  SHRINKAGE: With the increase of crimp %, shrinkage of fabric will decrease.  FABRIC COSTING: With the increase of crimp%, fabric costing will also increase.  FAULTS IN FABRIC: If there is variation of crimp in the threads then the following faults may be found in fabric; A) Reduction in strength may occur, and B) Stripes will be seen in yarn dyed cotton fabric.
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   FABRIC DESIGN:To achieve satisfactory appearance and required shape in finished fabric control of crimp in warp and weft yarn is necessary..  FABRIC STIFFNESS: If crimp is increased then stiffness of fabric will decrease.  ABSORBENCY: With the increase of crimp % absorbency of the fabric will increase.  DIMENSIONAL STABILITY: Dimensional stability will decrease with the increase of crimp%.  FABRIC HANDLE: If crimp is increased then the fabric will be soft in handle.  DYE TAKE-UP: With the increase of crimp the take-up percentage of dye-uptake will also increase.
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  Crimp interchange  Aparameter which is significant for the structure of the fabric and also for the pore shape and size.  When the fabric is loaded there is often a change in the ratio of the crimp of the warp and weft system.  This change is referred to as crimp interchange.