Test to be completed for both male and female component individually. Test component to be fixed to the tensile testing machine using the correct clamp. aaa
In process inspection for the tension test and keep the records in the risk analysis report. Sample selection should be as per the. But zero tolerance.
Initially when machine setting or if any adjustment, factory
needs to make 10 mock ups for testing. Once machine is set factory needs to
test the machine for consecutive 05 passes for fty to start bulk. Test specimen
needs to be attached to the risk analysis format
Everyday n the morning when production starts initial 05
production garments need to be checked and need fty to record the results in
the Risk analysis report. if any single defective unit , fty needs restart with
mock up process
Every day after lunch fty needs select sample qty as per the factory and conduct the tension test, record the data in Risk analysis report. If any single defective unit, fty needs to rescreen all the produced garments in the morning hours. fty should adjust the machine and restart the mock up process.
Mock up should be in actual materials and similar
constructed counter specimens
Metal detection
Apply tensile strength
gradually up to 20.2 LBS or 90 N for draw cord sleeving & 19 LBS or 84.5 N for button pull over a period of time of 10 seconds
Analysis of Thermal Resistance and Humidity Resistance Test
Analysis of Thermal Resistance and Humidity Resistance Test
Why it matters?
Clothing thermal and wet comfort refers to the performance of clothing in which the human body exchanges heat and moisture with the environment under different environmental conditions and human activity levels until it reaches a balanced state.
Analysis of Thermal Resistance and Humidity Resistance Test
Clothing thermal and wet comfort performance has a wide range of applications in all walks of life, summer clothing is required to be refreshing and breathable, winter clothing is required to be warm. In extremely hot environments, clothing must be insulated and cooled, such as fire-fighting clothing, mineral clothing, and liquid-cooled clothing; in extremely cold environments, clothing must be cold-resistant and warm, such as cold-proof clothing and aerospace clothing.
Thermal resistance and humidity resistance are two important
indicators for measuring the thermal and wet comfort of clothing. Factors such
as clothing, environment, and sports will affect its measurement results. This
is of great significance for evaluating the thermal and wet comfort performance
of clothing, the design of functional clothing, the establishment of
thermophysiological models, and the improvement of sweating and warming dummy.
Definition of thermal resistance and humidity resistance:
Human body heat loss is mainly divided into sensible heat and latent
heat. Sensible heat refers to the heat released by the human body to the
outside when there is a temperature difference between the human body and the
environment. The main forms are conduction, radiation, and thermal convection;
latent heat refers to the heat that is removed in the form of sweat
evaporation.
Clothing thermal resistance (° C · m2 / W) represents the resistance
to heat flow due to the temperature difference between the layers of the
clothing. The thermal resistance value can be expressed by the ratio of the
temperature difference between the clothing layer and the layer and the heat
flux passing through the unit area of the clothing vertically. At present,
the internationally common indicator is the clo value, which is defined as:
indoors where the temperature is 21 ℃, humidity is 50% ± 0.2%, and the wind
speed is less than 0.1 m / s. Adult men who sit quietly or engage in light
mental work feel comfortable (The metabolic heat generation is about 58.15 W /
m2), and the thermal insulation ability of the clothing worn when the average
skin temperature is maintained at about 33 ° C is 1 clo (1 clo = 0.155 ° C · m2
/ W).
Clothing wet resistance (Pa · m2 / W) means the moisture permeability
resistance caused by the water vapor pressure difference between the inside and
outside of the clothing. The wet resistance value can be expressed by the ratio
of the water vapor pressure difference between the inside and outside of the
garment and the evaporative heat flux in the vertical passage unit area. When
the human body feels hot flashes, sweat will be secreted from the skin to take
away the body’s heat. Among them, the amount of attached sweat (amount of sweat
adhered to the skin surface) and the amount of sweat flowing (amount of sweat
flowing down) are both ineffective sweat amounts. The amount of evaporated
sweat can take away the body’s heat, which is called effective sweat.
Thermal resistance test:
Note: To conduct the test, you will need a instrument called Sweating Guarded Hotplate. or you can know more by watching this video https://youtu.be/GlXE8_1F2nU
(1) The test process is: cold machine preheating-thermal resistance
parameter setting-thermal resistance empty plate test-thermal resistance test
(2) Cold machine preheating: After the power is turned on, the whole
machine needs to be warmed up for 45min. A medium-thick fabric is added to the
test board, and the test board is brought to 35 degrees Celsius, and the fabric
is removed. Then observe the temperature of the heating plate and the
temperature of the bottom plate to about 35.2, complete the preheating of the
cold machine, and then put the test sample (or standard sample) into the test
bench.
(3) Thermal resistance parameter setting: Set according to standard
requirements.
(4) Thermal resistance plate test: The thermal resistance under the
temperature gradient is measured without putting the test sample. The empty
board test does not have to be done every time, because the repeat error of the
empty board test is quite small, it is recommended to test it from March to
June.
(5) Thermal resistance test: Put the test sample on the surface of the
test plate, adjust the lift button on the front of the test bench inside the
test chamber, cover the four sides of the metal blank, and when the metal blank
is exactly horizontal, then lower the plexiglass cover , Close the instrument
door, and press the start button, the instrument will run automatically. When
it is stable, press the stop button, the instrument will keep the displayed
thermal resistance value as the test result.
(6) Replace the sample and repeat the previous steps for testing.
Finally, take the mean value for evaluation. The result retains 3 significant
digits.
Humidity wet resistance test:
(1) The test sequence is: preheating of the cold machine-setting of
the wet resistance parameters-humidification and replenishment and placement of
the test film-wet block test-wet resistance test
(2) Preheating of the cold machine: After the power is turned on, the
whole machine needs to be warmed up for about 60min. A piece of fabric of
medium thickness is added to the test board, and the test board is brought to
35 degrees Celsius, and the fabric is taken out. Then observe the temperature
of the heating plate and the temperature of the bottom plate to about 35.2,
complete the preheating of the cold machine, and then put the test sample (or
standard sample) into the test bench.
(3) Except for humidification and replenishment and film placement,
the wet resistance test is similar to the thermal resistance, and is not
repeated here. Humidification and replenishment: Press the wet resistance key
on the control panel, loosen the waterproof joint of the adjustment rod a
little, and the water in the replenishment tank will automatically flow into
the test box. When water comes out, you can stop the water level adjustment
lever to pull up and tighten the waterproof joint.
Take two sheets of film, the elastic side is used for testing, flatten the surface of the perforated plate, and the two layers of film can be appropriately wetted with distilled water. Take the cotton pad in the attachment to smooth the film
Conclusion:
Conduct a specific test is the only way to get the full story of the
clothing performance, for comfort wearing, thermal and humidity resistance test
is a must.
1.Ring groove width: 0 ~ 1.00 mm, a total of 13 kinds of specifications 2.Dimensions (L × W × H): 180 × 105 × 66 mm 3.Weight: about 2 kg
1.Adopt the guide with the accuracy and repeatability of the bearings; 2.Reasonable fulcrum structure design, the sampling more accurate, convenient and lightweight.
Sample A: 152 * 12.7 mm (for ring pressure)
Sample B: (200 to 250) * 15 mm (for drawing)
Sampling thickness: 0.1 ~ 1.0 mm
Dimensions: 670 * 450 * 470 mm (W * D * H)
Weight：about 20 kg
Side pressure sampler
Technical Parameters:
Sampling size: 25 * 100 mm (pressure side of the
sample) / 25 * 80mm (adhesive sample)
Participation committee election procedure in Textile :
1. Election commissioner is selected by the management of the organization in each year of month of June.
2. Election commissioner will announce
the election date by month of July in each year .
3. To operate the whole election procedure,
election commissioner will select the presiding officer from each floor /
department.
4. Members of the committee: As per
industrial act1969 ordinance 66 section-6, the company’s participation
committee will be consisted of 25 members. Where from worker end total member
will be 13 persons and from management 12 persons will be remaining in the
committee.
5. Election commissioner will call on the
nomination form the concern floor or department in the prescribe from.
6. Elligilability of each candidate: He/
She must work at least one year in the factory and at least 24 years age.
7. Poling agent: After examination of the
application of the nominees, election commissioner set the nomination list and
post in the notice board. As well as, call on the poling agent list from the
candidates in the prescribe form.
8. Election process: In presence of the
concern presiding officer along with the polling agent, the candidates name
will be declared among the workers and ask to raise the hands for their
supporters. Thereafter, all the polling agents will count the hands and submit
the report (a prescribe form) to the presiding officer and will declare the
name of the winner. Election procedure in each floor shall be followed as
mentioned above. Even if any position of the committee is vacant, the election
procedure for the same position will be conducted as mentioned above.
9. After finalization the whole report,
new committee list will be posted in the notice board.
1, chamber size: 450 × 1170 × 500mm
2, Dimensions: 550 × 1300 × 1480mm
3, Material: 304 stainless steel
4, controller: South Korea imported controller
5, sample rack: aluminum frame-based base plate
6, controller: color touch screen program control
device
7, lamp: UVA-340 8 sticks
Overload set with automatic stop alarm
Using a list of ways to measure the stored test data.
times range: 0 ~ 999999
Drive mode: Rotate the eccentric wheel
Display: large-screen LCD real-time display
Plug the force range: 0 ~ 50kg
Minimum insertion force resolution: 0.01kg
Stroke adjustment example: 0 ~ 60MM
Test speed: 10 ~ 60 (digital display)
Two units conversion: N, KG, IB
UV aging testing machine
UV accelerated test for materials (typically 3 hours at 70 ° C in a box of material equivalent to 2 months of aging in nature). Pollution can be used to mark the standard reference material aging grade. You can also visualize the degree of material aging. Specification: Size: 100x70x120 work area W60xD50xH750 Temperature range: RT + 10-80 ℃ temperature uniformity ≤ 1 ℃ Temperature fluctuations: ≤ ± 0.5 ℃ UV wavelength 360um Lamp: 6 40W temperature control mode NC temperature control mode Turntable: 1 Aging testing machine Voltage: 220V 2KW
Test environment: atmospheric pressure, no-load, aging testing machine no-load conditions
