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    1.2 Fabric Analysis

    Uploaded by

    nadim69
    1. This document outlines various methods for analyzing fabric parameters through samples, including identifying the face and back, warp and weft, density, crimp, linear density, fiber content, weight, and structure. 2. Key analysis methods involve examining sample location and size, using microscopes and solvents to distinguish fibers, measuring thread density and crimp percentage, determining linear density in tex, and calculating fabric weight based on thread properties and structure. 3. The goals are to understand fabric properties, which are linked to parameters like density, fiber content, and weave structure, in order to fully characterize samples for further evaluation. Homework involves analyzing given samples to collect all measurable parameters.

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    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd

    1.2 Fabric Analysis

    Uploaded by

    nadim69
    581 views15 pages
    1. This document outlines various methods for analyzing fabric parameters through samples, including identifying the face and back, warp and weft, density, crimp, linear density, fiber content, weight, and structure. 2. Key analysis methods involve examining sample location and size, using microscopes and solvents to distinguish fibers, measuring thread density and crimp percentage, determining linear density in tex, and calculating fabric weight based on thread properties and structure. 3. The goals are to understand fabric properties, which are linked to parameters like density, fiber content, and weave structure, in order to fully characterize samples for further evaluation. Homework involves analyzing given samples to collect all measurable parameters.

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    1.2 fabric analysis.ppt

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    1. This document outlines various methods for analyzing fabric parameters through samples, including identifying the face and back, warp and weft, density, crimp, linear density, fiber content, weight, and structure. 2. Key analysis methods involve examining sample location and size, using microscopes and solvents to distinguish fibers, measuring thread density and crimp percentage, determining linear density in tex, and calculating fabric weight based on thread properties and structure. 3. The goals are to understand fabric properties, which are linked to parameters like density, fiber content, and weave structure, in order to fully characterize samples for further evaluation. Homework involves analyzing given samples to collect all measurable parameters.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    581 views15 pages

    1.2 Fabric Analysis

    Uploaded by

    nadim69
    1. This document outlines various methods for analyzing fabric parameters through samples, including identifying the face and back, warp and weft, density, crimp, linear density, fiber content, weight, and structure. 2. Key analysis methods involve examining sample location and size, using microscopes and solvents to distinguish fibers, measuring thread density and crimp percentage, determining linear density in tex, and calculating fabric weight based on thread properties and structure. 3. The goals are to understand fabric properties, which are linked to parameters like density, fiber content, and weave structure, in order to fully characterize samples for further evaluation. Homework involves analyzing given samples to collect all measurable parameters.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
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    1.

    2 Fabric Analysis:
    Purposes:
    Get to know the fabric parameters
    Reasons for knowing the fabric parameters:
    The properties of the fabric are closely linked to fabric parameters

    . Making samples
    . Identification of face or back of the fabric
    . Identification of warp and weft
    . Density measurement
    . Crimp measurement
    . Linear density (tex) measurement
    . Fiber identification
    .Fabric weight
    . Fabric structure and color arrangement

    . Making samples
    The sample should properly represent the
    characteristics of the fabric.
    Location:

    The sample should not be selected near the edge


    of the fabric. The distance from the selvage must
    be more than 5 centimeters, and that from the end
    of the fabric must be more than 1.5 to 3 meters.

    Size:

    The size of the sample varies depending on the


    characteristics of the fabric, 15cm 15cm are
    suitable for simple structure and small pattern
    fabrics, and 20cm20cm for fabrics with big
    pattern.

    . Identification of face
    or back of the fabric

    The face of a fabric has a clear colour or patterns.


    For rib or corded fabrics, the face are usually more
    dense and smooth.
    For pile fabrics, the face has piles.
    For double fabrics, the face has higher density, and
    better materials.
    For terry fabrics, the face has denser loops.

    . Identification of
    warp and weft

    The warp is always parallel with selvage.


    The warp may be sized, and the weft not.
    The warp usually has a bigger density .
    The warp direction may have reed marks.
    The warp is more often using ply yarn.

    Identification of warp and


    weft

    The Z-twist yarns are used for warp, and S-twist for weft
    if the warp and weft are different in twist direction.
    The warp usually has higher twisted yarns.
    The warp is usually better in quality.
    For terry fabrics, the warp forms the loops.
    For striped fabrics, the warp is parallel to the stripes.
    Warp can be easily arranged with different kinds of yarns.

    . Density
    measurement

    The density of the fabric is very important, as it


    directly affects the fabrics appearance, handle,
    thickness, strength, warmth retention. There are
    two ways to measure it.
    a: Direct measurement
    b: Indirect measurement

    Direct measurement
    Thread density=threads counted/2.5=threads per cm

    Indirect measurement-woven fabric


    This is carried out by using an optical device known as a
    taper line grating.

    . Crimp measurement

    Crimp refers to the amount of bending that is


    done by a thread as it interlaces with the
    threads that are lying in the opposite direction
    of the fabric
    ly l f
    Formula: Crimp % (c) l 100
    f

    Where: ly is the length of the yarn


    lf is the length of the fabric

    Crimp tester

    .Linear density (tex)


    measurement
    The thread linear density indicates the
    weight in gram of 1000m of thread

    1000G
    Linear density (tex)
    L
    Where : G The weight of the thread in gram at the official moisture
    regain
    L The length of the thread in meter

    . Fiber identification

    a) Microscopically examination of the longitudinal and


    cross-sectional views of the fiber.
    b) Burning test
    c) The use of solvents
    d) Other chemical tests
    e) Staining
    f) Melting point determination
    g) Fiber density

    .Fabric weight

    Weighting measurement:
    Mass per unit area(g/m2)=specimen mass (g) 100
    Where: mass per unit area is expressed in grams per square meter
    specimen is 10cm10cm

    Calculating measurement:

    fabric weight is the sum

    of the weight of warp and weft threads

    Where:p1warp density(ends/10cm)
    p2--- weft density (picks/10cm)
    a1--- warp take-up(%)
    a2 --- weft take-up(%)
    Tex1warp linear density
    Tex2- weft linear density

    . Fabric structure and


    colour arrangement

    It is necessary to know the way in which the


    fabric is constructed. For example, twill weave
    or sateen. This can be obtained viewing the
    fabric with a piece of magnifying glass or a low
    magnification microscope.

    Home work:

    Analyze the given samples, get all the


    parameters you could.

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