1 2 fabric analysis
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

1.2 Fabric Analysis: PowerPoint PPT Presentation


  • 119 Views
  • Uploaded on
  • Presentation posted in: General

1.2 Fabric Analysis:. Ⅰ. Making samples Ⅱ. Identification of face or back of the fabric Ⅲ. Identification of warp and weft Ⅳ. Density measurement Ⅴ. Crimp measurement Ⅵ. Linear density (tex) measurement Ⅶ . Fiber identification Ⅷ .Fabric weight Ⅸ. Fabric structure and color arrangement.

Download Presentation

1.2 Fabric Analysis:

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


1 2 fabric analysis

1.2 Fabric Analysis:

Ⅰ. Making samples

Ⅱ. Identification of face or back of the fabric

Ⅲ. Identification of warp and weft

Ⅳ. Density measurement

Ⅴ. Crimp measurement

Ⅵ. Linear density (tex) measurement

Ⅶ . Fiber identification

Ⅷ .Fabric weight

Ⅸ. Fabric structure and color arrangement

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

Ⅰ. 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.


1 2 fabric analysis

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 20cm×20cm for fabrics with big pattern.


Identification of face or back of the fabric

Ⅱ. 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

Ⅲ. 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.


1 2 fabric analysis

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

Ⅳ. Density measurement

  • The density of the fabric is very important, as it directly affects the fabric’s appearance, handle, thickness, strength, warmth retention. There are two ways to measure it.

    a: Direct measurement

    b: Indirect measurement


1 2 fabric analysis

  • 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

Ⅴ. 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

  • Formula:

Where: ly is the length of the yarn

lf is the length of the fabric


Crimp tester

Crimp tester


Linear density tex measurement

Ⅵ .Linear density (tex) measurement

Where : G ─ The weight of the thread in gram at the official moisture regain

L─ The length of the thread in meter

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


Fiber identification

Ⅶ. 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

Ⅷ .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 10cm×10cm

  • Calculating measurement: fabric weight is the sum of the weight of warp and weft threads

    Where:p1—warp density(ends/10cm)

    p2--- weft density (picks/10cm)

    a1--- warp take-up(%)

    a2 --- weft take-up(%)

    Tex1—warp linear density

    Tex2–- weft linear density


Fabric structure and colour arrangement

Ⅸ. 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

Home work:

  • Analyze the given samples, get all the parameters you could.


  • Login