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Abstract
Fancy yarns create interesting decorative effects in the fabrics rather than functional purposes. Fancy yarns are one that differs from the normal constructions of single and folded yarns by deliberately produced irregularities in its constructions.
Chenille yarns are fancy yarns with beautiful, soft and fuzzy surface. They have become the choice of designers for many items.
Chenille yarn consists of short lengths of spun yarn or filament that are held together by two ends of highly twisted fine strong yarn. The short lengths are called the pile and the highly twisted are called the core or lock yarn.
Chenille fabrics are influenced with materials, number of twist, pile density, pile length of chenille yarns and also the weave structure which reflects in turn on the end product properties.
There fore, it was necessary to study ”The effect of some Geometrical construction elements on the functional performance properties of chenille fabrics”
This study consists of there parts covering the theoretical, practical and experimental aspects of the subject.
Part one (the literature of review)
It talks about the pervious studies that related to the research subject through four chapters as follows:
The first chapter includes fancy yarns structures, properties, and their types
The second chapter includes types of chenille yarns and methods of creating chenille yarns.
The third chapter includes technical features of chenille yarns.
The fourth chapter includes materials and end uses of chenille yarns.
Second Part: (Practical works)
Includes the applied studies of the research thorough three chapters as follow: Chapter one: includes the machine specifications used in producing the chenille yarns.
Chapter two: includes the designing of the experimental work for producing chenille yarns with four parameters (pile density- twist-material- pile length) than there yarns were used as wefts for producing chenille fabrics with four different structures depending on the float length of chenille yarn.
Chapter three: includes the experimental tests which applied on the produced chenille yarns (yarn count- tensile strength and elongation for yarn- yarn abrasion resistance- measure the pile angle for chenille yarn) and fabrics (fabric thickness- fabric weigh-tensile strength and elongation for fabric- tear strength for fabric fabric abrasion resistance- air permeability).
Part three (results and Discussion)
By studying the results of tested chenille fabrics properties the following results have been found.
Conclusions for yarns:
It was found that pulley diameter has direct relationship with yarn count ensile strength and elongation but also has an inverse relation ship with abrasion resistance and pile angle. 2- It was found that twist level has an inverse relationship with yarn count, tensile strength, elongation and pile angle, but has a direct relationship with abrasion resistance.
3. The polyester yarns have recorded highest rates to tensile strength and abrasion resistance and the Acrylic yarns have recorded highest rates to elongation.
4 It was noticed that the pile length has an inverse relationship with yarn count, elongation and pile angle but has a direct relationship with yarn abrasion resistance.
Conclusions for fabrics:
1- It was noticed that, the pulley diameter has a direct relationship, elongation in warp direction, tear strength in warp direction, elongation in warp direction, tear strength in warp direction and air permeability. But also has an inverse relationship with thickness-tensile strength in warp direction, elongation in weft direction, tear strength in weft direction and abrasion resistance fabric weight.
2- It was noticed that, the twist level has a direct relationship with fabric thickness, fabric weight tensile strength in warp direction elongation in warp direction and elongation in weft direction but also has an inverse relationship with tensile strength in weft direction, tear strength in warp direction, tear strength in weft direction, air permeability and abrasion resistance.
3- Fabrics of polyester chenille have recorded the highest rates of tensile strength in weft direction, elongation in warp direction, tear strength in warp direction, tear strength in weft direction and abrasion resistance. Fabrics of Acrylic chenille have recorded the highest rates in fabric thickness and elongation in weft direction.
4. It was noticed that, the pile length has a direct relationship with fabric weight, fabric thickness, elongation in warp direction, Tear in weft direction and abrasion resistance but also has an inverse relationship with tensile in warp direction, tear in warp direction and air permeability.
5. It was that, the float length has a direct relationship with thickness, tensile in warp direction, elongation in weft direction, tear strength in warp direction, tear strength in weft direction and air permeability but has an inverse relationship with fabric weight tensile strength in weft direction, elongation in warp direction and abrasion resistance