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Textiles Specifications and End Use Analysis > Exam 2 > Flashcards

Exam 2 Flashcards

1
Q

Fabric to Metal Test

A

Overview of Test: evaluates the relative clinging tendency of certain fabrics due to electrostatic charge generation for apparel fabrics, report the maximum cling time to the nearest .1 minute
Advantages: takes fabric weight, stiffness, construction, surface character, finish application, etc, which affect the tendency of a fabric to cling into consideration
Disadvantages: Some people are more prone to electrostatic cling than others, This test cannot be related directly to fabric to body clinging

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2
Q

Oily Stain Release Method

A

Overview of Test: measure the ability of fabric to release oily stain during home laundering, A stain is applied to a test specimen, An amount of the staining substance is forced in to the fabric by using a specified weight, launder
Advantages:
Disadvantages:

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3
Q

Water Repellency Spray Test

A

Overview of Test: for all textiles, measures resistance of fabric to water, good for measuring the water-repellent efficiency, Pour 250 mL of distilled water at 80 degrees plus or minus 2 into the funnel of the tester and allowed to spray onto the test specimen for 25-30 seconds
Advantages: fast and easy, simple and portable test
Disadvantages: Does not measure penetration of water through the fabric, Does not predict the rain penetration
RATED 5-0*

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4
Q

Water Resistance Rain Test

A

Overview of Test: Measures the resistance of fabric to the penetration of water by impact, Predicts the probable rain penetration of the material, Run the test for 5 mins, three times, and measure the increase in the weight of blotter (paper), Steps of one foot in order to fins the max head at which no penetration occurs
Advantages:
Disadvantages:

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5
Q

Water Resistance Impact Penetration Test

A

Overview of Test: for all textiles, measures resistance of fabric to water, good for measuring the water-repellent efficiency, Pour 500 mL of distilled water at 80 degrees plus or minus 2 into the funnel of the tester and allowed to spray onto the test specimen for 25-30 seconds
Advantages: fast and easy, simple and portable test
Disadvantages: Does not measure penetration of water through the fabric, Does not predict the rain penetration
RATED 5-0*

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6
Q

Water Repellency Tumble Jar Dynamic Absorption Test

A

Overview of Test: for all fabrics, Measures the resistance of fabric to wetting by the water, More suitable for measuring the water repellant efficiency of finishes applied to fabrics
Advantages:
Disadvantages:

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7
Q

Colorfastness to Acids and Alkalis

A

Overview of Test: Evaluates the action of acid fumes, sizes, alkaline, alkaline cleaning agents and alkaline street dirt, good for all fabrics, The specimens are steeped in or spotted with the required solutions and then evaluated for color change after drying, use greyscale
Advantages:
Disadvantages:

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8
Q

Colorfastness to Bleaching - Peroxide

A

Overview of Test: for all textiles but polyamides, Put the sample between two pieces of white fabric and sew the four sides of sample and Put it in the appropriate bleach solution for indicated time and use greyscale
Advantages:
Disadvantages:

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9
Q

Colorfastness to Sodium Hypochloride Bleach (Chlorine Bleach) in Home Laundering

A

Overview of Test: Specimens are laundered under appropriate conditions of temperature, detergent solution, chlorine bleach solution and abrasive action for five home laundering cycles. The laundered specimens are evaluated for color change using Gray Scale or spectrophotometer
Advantages:
Disadvantages:

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10
Q

Colorfastness to Burnt Fumes

A

Overview of Test: for all textiles, measure the color change due to the atmospheric oxides of nitrogen as derived from the combustion of illuminating or heating gas, Specimen and control are exposed simultaneously to gas fumes until the control shows a change in color corresponding to that of the standard of fading, use greyscale and if no change test again
Advantages:
Disadvantages:

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11
Q

Crock Meter

A

Overview of Test: for all fabrics, Finger covered with white cloth, 20 cycles, Test warp and filling direction, can be Dry or wet
Advantages:
Disadvantages:

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12
Q

Rotary Vertical

A

Overview of Test: for all fabrics but mostly prints, ○ Dry or wet, Use chromatic transference scale, Use grayscale for staining
Advantages:
Disadvantages:

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13
Q

Carpets Crock Meter

A

Overview of Test: Use after shampooing, steaming and hot water extraction, Use grayscale or chromatic transference, Dry or wet, 10 complete turns
Advantages:
Disadvantages:

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14
Q

Colorfastness to Dry Cleaning

A

Overview of Test: Attach un dyed cotton fabric to specimen
Place specimen and 12 steel discs inside 4x4 “ bag
Sew bag and put in launderometer container
Run at 86+-4 degrees for 30 min
Remove and dry sample in air
Eval using greyscale
Advantages:
Disadvantages: does not cover effect of water spotting, solvent spotting, steam pressing

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15
Q

Colorfastness to Laundering

A

Overview of Test: test is the equivalent to 5 home launderings. used on textiles that are expected to be laundered frequently. evaluate color change using grey scale. 5 different tests equivalent to 5 different types of washes (hot vs cold, home vs commercial etc.)
Advantages:
Disadvantages:

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16
Q

Colorfastness to Light - Enclosed Carbon, Arc Lamp, Continuous Light
TEST 1

A

Overview of Test: put the fabric in the sample holder and examine the sample and the standard after 5, 10,20,40, 80 etc sec. Find how long it takes to get to stage 4 color change. for 2 step method- repeat until stage 3 color change
Disadvantages: MAJID HATES CARBON- is dirty can affect color change, When you cut carbon it should be the same size, Clean globe and free of chips and cracks, Globes mist be changed after 2000 hours, Dirty to work with, Small displacement of the specimen toward or away from lamp may lead to differed fading
RH = 30 plus or minus 5%; it is different in real life
Advantages: easy, fast

17
Q

Colorfastness to Light - Enclosed Carbon, Arc Lamp, Alternate Light and Dark
TEST 2

A

Overview of Test: put the fabric in the sample holder and examine the sample and the standard after 5, 10,20,40, 80 etc sec. Find how long it takes to get to stage 4 color change. for 2 step method- repeat until stage 3 color change
Disadvantages: MAJID HATES CARBON- is dirty can affect color change, When you cut carbon it should be the same size, Clean globe and free of chips and cracks, Globes mist be changed after 2000 hours, Dirty to work with, Small displacement of the specimen toward or away from lamp may lead to differed fading
Advantages: easy, fast

18
Q

Colorfastness to Light - Xenon, Arc Lamp, Continuous Light (Black Panel Option)
TEST 3

A

Overview of Test: need xenon reference fabric. put the fabric in the sample holder and examine the sample and the standard after 5, 10,20,40, 80 etc sec. Find how long it takes to get to stage 4 color change. for 2 step method- repeat until stage 3 color change
Advantages: xenon is cleaner, light generated is more uniform, easier to work with, equipment takes up less space.
Disadvantages:

19
Q

Colorfastness to Light - Xenon, Arc Lamp, Alternate Light and Dark
TEST 4

A

Overview of Test: need xenon reference fabric . put the fabric in the sample holder and examine the sample and the standard after 5, 10,20,40, 80 etc sec. Find how long it takes to get to stage 4 color change. for 2 step method- repeat until stage 3 color change
Advantages: xenon is cleaner, light generated is more uniform, easier to work with, equipment takes up less space.
Disadvantages:

20
Q

Colorfastness to Light - Xenon, Arc Lamp, Continuous Light (Black Standard Option)
TEST 5

A

Overview of Test: need xenon reference fabric. put the fabric in the sample holder and examine the sample and the standard after 5, 10,20,40, 80 etc sec. Find how long it takes to get to stage 4 color change. for 2 step method- repeat until stage 3 color change
Advantages: xenon is cleaner, light generated is more uniform, easier to work with, equipment takes up less space.
Disadvantages:

21
Q

Colorfastness to Light - Daylight Behind Glass

TEST 6

A

Overview of Test: need to take into consideration and measure for climatological data, ambient temperature, RH, radiant energy total, radiant energy UV.
Advantages: applicable to daily life
Disadvantages: lots of outside factors

22
Q

Colorfastness to Perspiration

A

Overview of Test: soak for 30 +- 2 min. in chemical solution. if no color change in 6 hours of drying, run again for 16-24 hours. greyscale to evaluate color change
Advantages:
Disadvantages:

23
Q

Standard Conditions

A

65 plus or minus 2 % humidity

70 plus or minus 2 degrees

24
Q

factors affecting colorfastness to light 1-6

A 
Special distribution of radiant energy 
Fabric construction 
Atmospheric contaminants 
Dye type and its application 
Exposure time 
Xenon-arc 
Age of the lamp and filters 
Wattage and voltage variations 
Type of machine 
Clock hours do not always have the same relations to the AATCC
25
Q

factors affecting colorfastness to laundering

A

temperature
detergent
bleaching
abrasive action

26
Q

grayscale for color change

A

5 no change, 1 heavily stained

27
Q

factors affecting colorfastness

A 
Laundering
Light
Abrasion
Bleaches
Ozone
Acid and alkaline
dry cleaning
Perspiration
Rain water
Seawater
Chlorinated pool water

Textiles Specifications and End Use Analysis (2 decks)

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