AATCC TM26-2020 Test Method for Ageing of Sulfur-Dyed Textiles Accelerated 硫染纺织品老化的试验方法

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AATCC Manual of International Test Methods and Procedures/2023 AATCC TM26-2020 101

1. Purpose and Scope

1.1 This test method describes a proce-

dure for determining whether sulfur-dyed

textile materials will deteriorate under

normal storage conditions and to estab-

lish the degree of such deterioration.

2. Principle

2.1 Specimens are steam-aged in a

moist atmosphere under controlled condi-

tions and then tested for loss in breaking

strength to determine if storage deteriora-

tion is likely.

3. Referenced Documents

3.1 ASTM E145, Standard Specifica-

tion for Gravity-Convection and Forced-

Ventilation Ovens.

3.2 ASTM E1402, Standard Guide for

Sampling Design.

4. Terminology

4.1 accelerated ageing, n.—in textile

processing and testing, use of controlled

environmental conditions to promote

rapid physical and/or chemical change in

a textile material.

4.2 sulfur dye, n.—a dye, containing

sulfur both as an integral part of the chro-

mophore and in attached polysulfide

chains, normally applied in the alkali-sol-

uble reduced (leuco) form from a sodium

sulfide solution and subsequently oxi-

dized to the insoluble form in the fiber.

5. Safety Precautions

5.1 The safety precautions specified in

the method/procedure are ancillary to the

testing procedures and are not intended to

be all inclusive.

5.2 It is the user’s responsibility to ref-

erence applicable safety data sheets, use

safe and proper techniques, and wear ap-

propriate personal protective equipment

in handling materials in this standard.

5.3 Users MUST consult manufactur-

ers for specific details such as equipment

operating instructions and other recom-

mendations. Consult and follow all appli-

cable health and safety regulations (e.g.,

OSHA standards and rules).

6. Apparatus

6.1 Conventional laboratory drying

oven (see 13.1), uniformly heated and

controlled to ± 2°C. It should be provided

with ventilating ports and some means

for introducing moisture (see 13.2) or;

6.2 Steam ager (see 13.3) equipped

with proper controls for uniform steam

flow and temperature.

6.3 Tensile testing machine.

7. Sampling

7.1 Test results are valid only when the

samples are statistically representative

(see ASTM E1402).

7.2 Sampling must be random. Every

unit of product must have a mathemati-

cally equal chance of becoming a sample;

and every portion of each sample must be

equally likely to become a test specimen.

7.3 All specimens must be alike within

the variations due to pure chance. There

must be no differences within samples as-

signable to known causes.

8. Test Specimens

8.1 Sufficient samples are taken for

both control and test specimens. Tensile

specimens are prepped from control and

aged samples after conditioning (see

10.1).

9. Procedure

9.1 Oven Test, Option 1. Expose the

specimens to 135 ± 2°C heat in the oven

for 6 h continuously. At the beginning of

the second, third, fourth, fifth and sixth

hours, close the ports or vents and add 20

mL of water for each 0.03 m3 (1.0 ft3) of

oven capacity. Keep vents closed for 5

min, then open and resume circulation for

the rest of the period. At the end of 6 h of

heating, remove the specimens from the

oven and place in a conditioning room.

9.1.1 Oven Test, Option 2. Expose the

specimens to 135 ± 2°C heat in the oven

for 6 h. Remove the test specimens from

the oven at the end of each hour and thor-

oughly humidify in an atmosphere of

steam, then replace in the oven. At the

end of 6 h of heating, remove the speci-

mens from the oven and place in a condi-

tioning room.

9.1.2 Oven Test, Option 3. Expose the

specimens to 135 ± 2°C heat in the oven

for 6 h continuously. At the beginning of

the test, introduce 100 mL of water for

each 0.03 m3 (1.0 ft3) of oven capacity us-

ing a vessel having a surface area of ap-

proximately 413 cm2 (64 in.2). Leave the

vents open during the entire test. At the

end of the 6 h of heating, remove the

specimens from the oven and place in a

conditioning room. Under the conditions

above, it has been found that the water

will require 1.75-2.0 h to evaporate.

9.2 Steam Ager Test. Suspend the test

specimens while ageing, or tack on

frames and place in the steam ager, pyra-

mid style, with the bottom baffle func-

tioning as a support. Age the specimens

for 8 h with saturated steam at 103 kPa

(15 psi) pressure, or for 16 h at 51.7 kPa

(7.5 psi) pressure. After the ageing test is

completed, remove the specimens from

the ager and place in a conditioning

room.

10. Evaluation

10.1 Condition test specimens and un-

aged controls for 16 h at standard condi-

tions, 65 ± 5% RH and 21 ± 2°C (70 ±

4°F), before performing breaking

strength tests. Perform testing under the

same standard conditions.

10.2 Determine the breaking strength

of the unaged control specimens. Since

comparative, but not absolute, results are

to be obtained, any suitable breaking

strength machine may be used which is

adaptable to breaking the specimens be-

ing tested. Perform a minimum of 10 sig-

nificant breaks and average the results.

10.3 Determine the breaking strength

of the aged specimens. Perform a mini-

mum of 10 significant breaks and average

the results.

10.4 Calculate percent loss (or gain) in

strength based on the unaged control

material.

11. Report

11.1 Describe or identify the sample

tested.

11.2 Report that the sample was tested

using AATCC TM26-2020.

11.3 Report the testing conditions:

11.3.1 Test procedure (oven test: Op-

tion 1, Option 2, Option 3, or steam ager

test).

11.3.2 Test conditions.

11.4 Report test method used for

breaking strength.

11.5 Report the test results:

11.5.1 Mean breaking strength and

standard deviation of unaged control

specimens.

11.5.2 Mean breaking strength and

standard deviation of aged test speci-

mens.

11.5.3 Percent loss (or gain) in strength

based on the unaged control material.

11.6 Describe any modification(s) of

the published method.

AATCC TM26-2020

Test Method for Ageing of Sulfur-Dyed Textiles: Accelerated

Provided by Accuris under license with AATCC

Licensee=Underwriters Laboratories - Ho Chi Ming City, Vie/5909636157, User=Le,

Not for Resale, 11/23/2023 20:10:19 MST

No reproduction or networking permitted without license from Accuris

--``,`,,,``,,```,`,,,,,,`````,-`-`,,`,,`,`,,`---

102 AATCC TM26-2020 AATCC Manual of International Test Methods and Procedures/2023

12. Precision and Bias

12.1 Precision. Precision for this test

method has not been established. Until a

precision statement is generated for this

test method, use standard statistical tech-

niques in making any comparisons of test

results for either within-laboratory or be-

tween-laboratory averages.

12.2 Bias. The accelerated ageing of

sulfur-dyed textiles can be defined only

in terms of a test method. There is no in-

dependent method for determining the

true value. As a means of estimating this

property, the method has no known bias.

13. Notes

13.1 The oven used may be of any conven-

tional design and constructed of conventional

material as long as the heating elements or

materials of construction do not give off gases

when heated that would tend to distort the re-

sults. The quantity of materials tested must

bear a fixed relationship to the capacity of the

oven, 25 g of materials tested per 0.03 m3

(1 ft3) of oven capacity being considered correct.

13.2 The temperature control must be accu-

rate within ± 2°C. Care must be exercised to

ensure that the thermometer indicates the true

and correct internal temperature of the area in

which the samples are being tested.

13.2.1 The oven should be equipped with

ports or vents of such size as to allow the air in

the oven to be changed approximately every 2

min except when humidifying. This may be

accomplished by natural convection or by a

circulating system. During humidification, the

ports or vents should be closed to confine the

moisture within the oven for the specified

time.

13.2.2 Controlled amounts of water (or

steam) should be admitted into the oven at

specified intervals. This may be through either

the top or the side of the oven. The requisite

amount of water should be added onto a

heated mass of material to effect rapid vapor-

ization. To effect this relatively rapid vapor-

ization, the weight of material should be

approximately 100 g for each gram of water

admitted per hour. The amount of water ad-

mitted should be sufficient to cause the filling

of the oven with steam at atmospheric pres-

sure each hour (20 mL of water produces ap-

proximately 0.03 m3 (1 ft3) of vapor at

atmospheric pressure and at 135°C). In addi-

tion to the desired rapid vaporization of the

water admitted, the mass of metal or other ma-

terials acts as a temperature stabilizer and

serves to prevent a sudden drop in temperature

owing to the latent heat of vaporization of the

water introduced. Ovens meeting the ASTM

specifications for accelerated aging of rubber,

equipped with automatic humidity control, are

acceptable (see ASTM E145, Standard Speci-

fication for Gravity-Convection and Forced-

Ventilation Ovens).

13.2.3 Provision must be made for holding

specimens to be tested so that they will not

contact the hot metal portion of the oven. A

suitable means is to hang the specimens by

strings from glass or wooden rods, avoiding

contact with each other and with the sides of

the oven. Materials tested must be held in that

part of the oven where the temperature is con-

stant and uniform and where all portions of

tested specimens are exposed to the same tem-

perature and the same conditions of humidity

and atmospheric change.

13.3 A typical steam ager consists essen-

tially of a closed cylinder, 58 cm (23 in.) long

by 38 cm (15 in.) diameter, inside measure-

ment, one end of which is a swinging door. A

groove in the face of the cylinder holds a gas-

ket against which the door is held tightly by a

lever clamp. The apparatus is equipped with a

pressure gauge, automatic temperature re-

corder, steam inlet with handcock flow control

valve, petcock, trap and baffle of thin stainless

steel sheet metal in the top half to prevent

dripping from condensation. A wooden frame

56 × 36 cm (22 × 14 in.), covered with coarse

cloth and supported by protruding bolts in the

sides along the center, serves as a bottom baf-

fle to prevent possible splashing. However,

any steam ager equipped with the proper con-

trols for uniform steam flow and pressure may

be adapted to this test procedure.

14. History

14.1 Revised in 2020 to clarify and align

with prescribed AATCC style guidelines.

14.2 Editorially revised 2016. Editorially

revised and reaffirmed 2013, 2009, 2004. Re-

affirmed 1999. Editorially revised and reaf-

firmed 1994. Editorially revised 1990.

Reaffirmed 1989, 1988, 1983, 1978. Revised

1975. Reaffirmed 1972. Revised 1952. Reaf-

firmed 1944.

14.3 Developed in 1943 by AATCC Com-

mittee RR9. Maintained by RA99.

Provided by Accuris under license with AATCC

Licensee=Underwriters Laboratories - Ho Chi Ming City, Vie/5909636157, User=Le,

Not for Resale, 11/23/2023 20:10:19 MST

No reproduction or networking permitted without license from Accuris

--``,`,,,``,,```,`,,,,,,`````,-`-`,,`,,`,`,,`---

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标签： #试验方法 #纺织品

摘要：

AATCC TM26-2020 Test Method for Ageing of Sulfur-Dyed Textiles Accelerated 是国际权威纺织测试组织美国纺织化学师与印染师协会发布的加速老化试验标准，专门用于评估硫染纺织品在湿热、光照或化学因素作用下色彩稳定性与纤维耐久性的变化。本方法通过模拟自然老化过程中的关键加速条件，在短时间内重现硫染料因氧化而导致的褪色、变色或强度下降现象，帮助生产商、质检机构与品牌方提前判定产品在存储、运输及实际使用中的色牢度表现。该标准适用于硫化

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AATCC TM26-2020 Test Method for Ageing of Sulfur-Dyed Textiles Accelerated 硫染纺织品老化的试验方法

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