Protective clothing - Protection against Radiant Heat Tester

Protective clothing - Protection against Radiant Heat Tester

Protection performance against radiant heat is the key indicator of flame retardant textiles and the accurate test on protection plays significant role in guiding fabric material option, research and development as well as crafts improvement.

Applications

Protectiveclothing - protection against radiant heat tester is used to determine protection performance of single layer or multiple layer fabrics against radiant heat in high temperature environment, besides, it’s available to test flame retardant sheet thermal insulation properties.

Protective clothing - Protection against Radiant Heat Tester Standards

EN366, ISO6942-2002

Test Methods

According to ISO6942-2002(EN366), we have two test methods for protection performance against radiant heat.

Method A: a specimen is exposed to a certain amount of radiant heat, to reproduce the bad conditions and record specimen appearance changes;

Method B: Place calorimeter to the specimen back side then heat transmission from that side; record temperature changing data over time first and can we then calculate radiant heat transmission.

Protectiveclothing - Protection against Radiant Heat Tester Specifications

1. Infrared quartz lamp: 5

2. Silicon carbide rods heating power: 6.5kW/220V/50Hz

3. Silicon cods heating length: 178mm, diameter 8mm

4. Heat source flux density: 10kW/m2～80 kW/m2 (adjustable)

5. Radiant heat temperature control: room temp-1200℃±5℃(accuracy is 1℃)

6. Radiant heat temperature sensor: thermocouple (0～1600℃)

7. Radiant heat temperature controller: PID intelligent adjustment controller

8. Calorimeter capacity: 480.937 J/K, heating area: 50×50mm2

9. Calorimeter temperature range: room temp-80℃; Temperature sensor: Pt100 (-200～450℃)

10. Operating platform: Chinese windows xp.

For more information on textile testinginstruments, QINSUN Instruments offer professional guide and will never let you down.

Garment Comfort Relies on Sweating Guarded Hotplate

Garment comfort consists of three aspects: thermal and water comfort, touching comfort and visual comfort. Both touching comfort and visual comfort can be measured by human body contact, while thermal and water comfort, as the most important feature, can only be measured by way of the professional device--sweatingguarded hotplate. 80% energy consumed by human activities turns to heat, and 90% of the energy will be dissipated, that’s why textile thermal resistance plays quite important role in maintaining human body temperature.

sweating guarded hotplate

Human body heat dissipating methods are various like radiations, conductivity, convection, besides, surface sweat evaporation can stimulate vapor diffusion and people will feel comfortable. If garments prevent water evaporation, then moisture content between skin and apparel increasing, vapor will accumulate and condense to water, people will feel quite uncomfortable. Garments thermal resistance and water vapor permeability of sweating guarded hotplate test exert great influence on heating exchange between human body and environment. Therefore, measuring these two factors can predict apparel thermal comfort in different environments.

sweating guarded hotplate standards

 sports wear water vapor peameability

Sweating guarded hotplate is especially popular among work wear such as firefighters, military police uniform and sport wear. For more sweating guarded hotplate information, QINSUN Instruments can offer professional guide.

Domestic and Imported Textile Testing Instruments Differences

It’s true that there are great differences between domestic and imported textile testing instruments based on the present situation. Of course with more learning, researching and capital injection, these differences will disappear. Getting a clear look at these differences will enable us to catch new technology and make progress in short time. Here are the gaps I believe we should pay attention to. 
1.   Quantitative gaps on using time and measurement accuracy

China Association for Science and Technology released their research result in March, 2007. In this report, they said there were more than 90 analyzing textile testing instruments among which only about 20 could be produced in China, less than 1/3. 

In terms of technology, most domestic medium low testing instruments can replace imported ones, but fall behind 1-2 range on accuracy of the high grade testing instruments.

In the matter of measuring accuracy, imported testing instruments are 1 range ahead of us. Domestic testing instruments are weak in basic technology and manufacturing crafts, some key technologies such as accurate processing, sealing and welding technology couldn’t be resolved properly, thus domestic high grade textile testing instruments have bad certainty.

Foreign testing instruments have higher intelligence and can suppress external interference to information, thus improving measuring accuracy.
It is introduced that the updating period of foreign textile testing instruments is 2-3years, and new technology can be reserved 10 years ahead of its due. While what we do is always to introduce foreign technology for updating, and cannot adopt nor digest the technology, thus we have little original innovation. 

2. Weak foundation and system mechanism isn’t be straightened out

The experts attended research say that textile testinginstruments are high technology industry, while most of time we rely on the advantage of low labor cost whose role cannot be played in testing instruments.

They attribute the domestic and imported textile testing instruments differences to the following aspects: 

a.    We haven’t formed the mechanism or policy of manufacturing, learning and researching, the innovation achievements conversion rate is low, and the technology application situation is bad.

b.    Lacking powerful research supporting system. Textile testing instruments feature various types, small batches and need long-term insistent devotion. However, the present domestic investment is diverse with no key points. Textile testing instruments manufacturers can neither participate in competition according to market economy rules nor lack strategic investments researching on resource. 

What we can do to make progress

With domestic technology development, many key technologies are being mastered and innovated, at the same time, we can manufacture many textile testing instruments with good stability and accuracy which are not far behind foreign testing instruments; besides, we are making effort to master the key and advanced technology, thus domestic textile testing instruments are probably the mainstream. Qinsun Instruments always devote to researching and developing high grade textile testing instruments in China. For more information, contact us.