How Factory Lab Assist Quality Assuarance -Anas-nizar-shoaib

8/8/2019 How Factory Lab Assist Quality Assuarance -Anas-nizar-shoaib

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PROCESS OPTIMIZATION

PROCESS LIMITATIONS

Fiber/Yarn/Fabric Checking Quality of Procurement Accessibility

Dye & Axillaries Purity/Concentration Test Efficiency of Chemical Possible Adverse Effects

PRODUCTION FACILITY

Technique Determining Efficiency of Procedure Optimizing Process Technique

Machine Limitation

Determining Production Potential

COSTING

Process Cost Deducing Process/Product Cost

Costing of Raw Material

DEFECTS

Identifying Defect Origin Detecting random defects and its cause

Overcoming/rectifying Defects

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Predicting Methods to Prevent Defects Mending the Defects

PRODUCT CHARACTERISTICS

Testing the physical and chemical properties/characteristics of theproduct is termed as product characteristics.Generally the labs took the small amount of sample from the lot orproduces smaller amount of product and observes their required teston that sample size product, this give the brief idea about

How the product will look What will be its aesthetics How good will be its strength

Fastness properties Other customer requirements

Objective

Different end uses have different performance requirements

Testing and analysis provide information concerning bothstructure andPerformanceof textile products

Consumers have certain expectations as to how aproduct should perform, and also have some idea as to how longthey expect to be able to use a product.

These testing are carried out at various stages in textile industry, ofwhich some of the important are discussed later.In every stage this testing is necessarily done at two instances

When procurement is boughtWhen product is produced

Both of above have different importance and purpose of testing,Testing of procurement is done to ensure that quality raw material isbought and that material is up to required standard and will notobstruct in making of quality product.

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Where as the final testing of product is done to certify that the productmade in factory is up to standard given by customers and also full fillsthe factory reputation.

TESTING IN WEAVING

Raw material: yarn

Following tests are observed in weaving lab to assure that yarn is ofdesired quality

Yarn Count Twist Per Inch (TPI) Twist tester Yarn strength Tensile tester Blend Yarn Weight Hairiness Hairiness Tester

Out come: Greige fabricFollowing tests are observed in weaving lab to assure that fabricproduced is of desired quality

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Tear test Count of fabric Cloth sett GSM Abrasion test

Shrinkage test Quality of size Quantity of size

TESTING IN PRE TREATMENT

Raw material: Greige Fabric

Following tests are observed in processing lab to assure that greyfabric is of required quality

Nature of size Size percentage Nature of Fiber GSM

Out come: Pre Treated FabricFollowing tests are observed in processing lab to assure that fabric hasgot the desired quality, these out comes varies in different cases as it issolely dependent on customer requirements.

Degree of Whiteness Feel/Softness Degree of Cleanliness Absorbancy

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TESTING IN DYEING

Raw material: Pre Treated Fabric

Following tests are observed in processing lab to assure that the fabricis of desired quality

GSM Nature of Fiber Dye Pickup

Testing of Dyes/Axillaries

Purity test/Concentration Possible Adverse affect

Out come: Dyed FabricFollowing tests are observed in processing lab to assure that dyedfabric has got the desired quality, these out comes varies in different

cases as it is utterly dependent on customer

Colour fastness to rubbing/crocking Colour fastness to dry cleaning Colour fastness to light Dimensional stability Tear strength

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Tensile strength Pilling resistance GSM Perspiration test Staining test

ph testing Skew/ Bow test

MACHINES USED IN PROCESSING LABS

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General Testing

Yarn crimp (woven)

Count and twist from

yarn in fabric

Dye-on-fiber

Mock dyeing/levelling

Strip dye/re-dye

Colour reflectance

measurement

Blend analysis

Analysis of fiberdistribution in yarn

Denier by microscopy

Yarn cross sections

Chemical damage

assessment

Dye rate and capacity

studies

PET density

determination

Sonic modulus of

filament or tow

ASTM Test Methods

Fiber identification

Qualitative textile

analysis

Flammability of

apparel textiles

Differential dyeing of

cotton

Extractable matter

determination

Moisture regain

Boiling water and dry-

heat shrinkage

Moisture level in

textiles

Bow and skew test for

woven and knitted

fabric

Bulk determination

for textured yarns

AATCC Test Methods

Absorbency of

bleached textiles

Alkali in bleach baths

containing hydrogen

peroxide

Appearance of

apparel and other home

textiles after repeated

launderings

Ash content of

bleached cellulosic

textiles

Instrumental colour

measurement of

textiles

Colourfastness to

acids and alkalis

Colourfastness to

bleaching with chlorine

Colourfastness to

bleaching with peroxideof woven or knitted

fabrics

Dimensional changes

in commercial

laundering of woven or

knit fabrics

Qualitative and

quantitative fiber

analysis Gray scale for colour

change

Gray scale for

staining

Mercerization in

cotton

pH of water-extract

from bleached textiles

Wrinkle-recovery of

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How Factory Lab Assist Quality Assuarance -Anas-nizar-shoaib

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