Thermal insulation property comparison of Y-warm cold proof clothing and a famou

Time: 2020-01-16

Author: Admin

Page View: 264


Y-warm


Y-warm project was launched in Beijing, China, in 2013, successfully developed in lab in 2017, and achieved mass production in 2019.



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What is Y-warm


Y-warm is a brand new flexible thermal insulation material, it’s made by environmental friendly, functional polymers and backing material, without containing PVC. Products specifications are as follows, thickness: 0.7 mm; unit weight: 43 g/sqm; width: 150 cm; thermal conductivity: 0.00824w/m.k; CLO value: 0.495.

A cold-proof clothing made by Y-warm, comparing with traditional down jacket, it drops 80% thickness, has 5 times thermal insulation efficiency.



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Excellent water vapor permeability



Y-warm has excellent water vapor permeability which makes the clothing made by it very comfortable.



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Fast liquid penetrability



Y-warm has good moisture absorption and fast drying ability, which can easily permeate out sweat generated by human body, so the clothing made by it has better wearing experience and thermal 



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Authoritative test report



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Y-warm won an international award


 On 16th Nov. 2019, we are informed Y-warm got the award “TOP 10 of the FIBERS &INSULATIONS category” in ISPO Munich Textrends 2020 to 2021, just 5 months after we achieved successful mass production.



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Thermal insulation property comparison of Y-warm cold proof clothing and famous brand down jacket


In order to scientific verification and valid comparison of thermal insulation property, we select a famous brand down jacket as the comparing object.


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The relationship between wind speed, relative humidity and thermal insulation


When wind speed increases by 1 m/s, sensible temperature drops by 2-3 centigrade, so setting wind force as 3 grade for clothing thermal insulation property test is relatively scientific.



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Precision of instrument determines value of experiment


Thermodetector

Famous FIuke-F52-2 thermodetector,To avoid errors generated by probe touching human body, we only measure temperature of the air in between outer garment and inside clothing。



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Air inductive probe


By using professional air inductive probe, we don’t need worry about data variation caused by position of the probe either nearby outer garment or inside clothing. The verification is very scientific. 


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Anemometer


Testo 416-professional anemometer can accurately measure ambient wind speed, so we don’t need worry about measurement errors.


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Ambient temperature/relative humidity meter and timer



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Time and place


12:00 PM, 11th Sep. 2019, a refrigeration warehouse in Beijing,


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Tester



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Testing garment



Y-warm business wind coat

Total thickness of Y-warm business wind coat is around 5 mm. Outer fabric thickness is 0.32 mm, lining thickness is 0.1 mm, and two layers Y-warm with 1.4 mm total thickness is filled in between fabric and lining. 


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Famous brand down jacket



 Famous brand down jacketTotal thickness  25 mm,Article number: 5501MB, size: XL, down weight: 118 g (down content 90%)


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Y-warm jacket



Total thickness of Y-warm jacket is around 4 mm,

Outer fabric thickness is 0.165 mm, lining thickness is 0.2 mm, and two layers Y-warm with 1.4 mm total thickness is filled in between fabric and lining.



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Tester’s dressing ways



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Garment test sequence



Considering physical exertion affects body temperature over time, we placed Canada Goose down jacket as second in test sequence.


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Test place preparation


Plane graph


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Temperature of refrigeration warehouse



Setting temperature: -20 centigrade, Actual temperature: from -10 to -12 centigrade.


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Wind speed setting


When wind speed increases by 1 m/s, sensible temperature drops by 2-3 centigrade. The distance between tester and fan is 1.5 m, wind speed is 3.5-4.5 m/min, equals 3 grade breeze.


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Body temperature distribution



To avoid excessive temperature errors, we choose the part with moderate body surface temperature for measurement.


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Two testing points



Two probes are placed respectively at abdomen and back area, and connected to the same equipment. Probes' position are fixed during test, and kept 1cm apart from tester's body, making the test result more scientific and effective.


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Probes are fixed tightly, in three tests they are placed at the same position



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Test method


Step 1: The tester stops movement in air-conditioned room outside of refrigeration warehouse for 10 minutes, if probe shows temperature is stable, record initial temperature and start the test;

Step 2: Enter refrigeration warehouse, start timing, and record the whole test process and temperature change through video;

Step3: Set fan speed, and keep distance between tester and fan is 1.5 m, let fan blow tester backside, total test period is 20 mins;

Step 4: After each garment testing the tester need take a 30 mins break in air-conditioned room, start another testing until he fully recovers strength and body temperature.



Start test


Test of Y-warm business wind coat


Before stepping into refrigeration warehouse, air temperature inside clothing as follows

Abdomen area: 27.2℃)(Back area: 27.1℃)


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After staying in refrigeration warehouse for 20 mins, air temperature inside clothing as follows, Abdomen area: 19.0, Back area: 15.5℃ 


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Temperature decline curve in 20 mins test



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Data comparison of 20 mins test



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Test of Canada Goose down jacket



Windbreak at bottom of down jacket must be tightened, otherwise cold air can penetrate into and makes temperature drop quickly


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Before stepping into refrigeration warehouse, air temperature inside clothing as follows


Abdomen area: 28.6℃)(Back area: 28.3℃)


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After staying in refrigeration warehouse for 20 mins, air temperature inside clothing as follows, Abdomen area: 16.3℃, Back area: 13.6℃



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Temperature decline curve in 20 mins test


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Data comparison of 20 mins test



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Test of Y-warm jacket



Before stepping into refrigeration warehouse, air temperature inside clothing as follows

Abdomen area: 28.0℃)(Back area: 28.8℃)


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After staying in refrigeration warehouse for 20 mins, air temperature inside clothing as follows, Abdomen area: 17.1℃, Back area: 16.1℃



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Temperature decline curve in 20 mins test



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Data comparison of 20 mins test



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Test result comparison



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Abdomen area- Air temperature inside clothing



Without blowing in front side, temperature change range and speed of the three garments are roughly same.


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Back area- Air temperature inside clothing

In breeze condition, temperature change range and speed of down jacket is even greater.



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According to this test we get the conclusion: A cold proof clothing made by filling 1.4 mm total thickness 2 layers Y-warm in between fabric and lining, in 3 grade wind speed, has a little bit better thermal insulation property than 25 mm thickness Canada Goose down jacket.



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Result analysis



Wind speed has a great influence on thermal insulation of clothing. Under influence of wind, dividing lines of down jacket become the shortest board of "wooden barrel", affect its overall thermal insulation performance. So in the real world Y-warm has more advantage in thermal insulation application.


Beijing Y-warm technology co., ltd. was established on 13th Jun. 2019. Main business is research & development, production and sales of thermal insulation material.

Y-warm is a kind of flexible thermal insulation material, it’s thermal conductivity is extremely low, which can dramatically decrease heat conduction and energy exchange; additionally it has good moisture absorption and fast drying ability, which can easily permeate out sweat generated by human body, so the clothing made by it is more comfortable, lighter and has better thermal insulation efficiency.


Y-warm’s applied temperature range is from -50 to 150 centigrade, so it can be used as thermal insulation functional material in more than 20 industries, such as garment, tent, automotive, train, airplane, wall paper and curtain etc.. Y-warm is a kind of revolutionary material which can upgrade industries, save energy and protect environment. 





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