CN103134914A - Microclimate instrument for measuring fabric moisture resistance and method thereof - Google Patents
Microclimate instrument for measuring fabric moisture resistance and method thereof Download PDFInfo
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- CN103134914A CN103134914A CN2013100467419A CN201310046741A CN103134914A CN 103134914 A CN103134914 A CN 103134914A CN 2013100467419 A CN2013100467419 A CN 2013100467419A CN 201310046741 A CN201310046741 A CN 201310046741A CN 103134914 A CN103134914 A CN 103134914A
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Abstract
The invention relates to a microclimate instrument for measuring fabric moisture resistance and a method thereof. The microclimate instrument comprises a heating disc and a vertical water supply pipe. A sweating simulated skin is disposed above the heating disc. A to-be-measured fabric is disposed on an insulated sleeve and a support cross in a suspended mode. A microclimate area is formed between the simulated skin and the to-be-measured fabric. Water is introduced to a water filling area between the heating disc and the simulated skin through the vertical water supply pipe. A heating wire used for heating is disposed under the heating disc. The surface of the sweating simulated skin is provided with a first temperature sensor, and the lower surface of the to-be-measured fabric is provided with a second temperature sensor and a humidity sensor. According to the method, after a system reaches a steady state, based on the measured rate of sweat passing the fabric, temperature and relative humidity of the lower surface of the fabric, and temperature and humidity of the environment, moisture resistance of the fabric and the air layer above are calculated, the moisture resistance of the air layer above is subtracted by the calculated moisture resistance, and the moisture resistance of the fabric is obtained. By the aid of the microclimate instrument for measuring fabric moisture resistance, the moisture resistance of pure moisture passing the fabric can be well measured.
Description
Technical field
The present invention relates to the wet comfortableness technical field of measurement and test of garment measuring heat, particularly relate to a kind of microclimate instrument and method thereof for measuring the wet resistance of fabric.
Background technology
Be exactly to have good water vapour permeability with the fabric of fibrous material manufacturing as its topmost features of main material of clothes.the water vapour permeability of measuring fabric all relates to skin sweating simulation technology, at present the wet resistance that the perspiration hot-plate instrument that uses (skin model) that German Hohenstein laboratory proposes then to become international standard ISO11092 is measured fabric in the world substantially, yet, such perspiration surveyor's table can not directly be measured the sweat evaporation capacity that effectively passes through fabric, can only indirectly measure the power that is consumed by the sweat vaporization, therefore, under can only adopting environment temperature and measuring isothermal method that hot plate temperature equates and non-isothermy, two-step approach (is first surveyed the xeothermic loss of lossless state, measure again the damp and hot loss under the sweat state) the wet resistance of measuring fabric.On the other hand, because tested fabric directly contacts with the perspiration film, aqueous water immerses fabric more or less, thereby measurement result is had a negative impact.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of microclimate instrument and method thereof for measuring the wet resistance of fabric, can directly measure the evaporated water by fabric, has avoided simultaneously aqueous water to immerse fabric inner and affect the problem of measurement result.
The technical solution adopted for the present invention to solve the technical problems is: a kind of microclimate instrument for measuring the wet resistance of fabric is provided, comprise heating disk and vertical feed pipe, described heating disk top is provided with sweating simulation skin, and described vertical feed pipe passes into water in the water-filling district of heating between disk and simulated skin; Described tested fabric is unsettled to be put above described sweating simulation skin, is provided with the heating wire for heating below described heating disk; Described sweating simulation skin surface is provided with the first temperature sensor, and described tested fabric lower surface is provided with the second temperature sensor and humidity sensor; Described the first temperature sensor, the second temperature sensor and humidity sensor all are connected with described TT﹠C system, and described TT﹠C system is used for controlling described electric-heating-wire-heating.
Described heating disk is provided with muff outward, and described tested fabric is by described muff and support that cross is unsettled to be put above described sweating simulation skin.
Described sweating simulation skin is arch, and adopts sealing isolation gas-bearing formation technology.
Described sweating simulation skin is PTFE microporous barrier compound fabric.
The technical solution adopted for the present invention to solve the technical problems is: a kind of using method of above-mentioned microclimate instrument for measuring the wet resistance of fabric is provided, comprises the following steps:
(1) utilize heating wire to heat, make microclimate instrument be in steady state (SS);
(2) according to temperature and the relative humidity of fabric lower surface, and the temperature of environment and relative humidity, calculate the wet resistance of tested fabric and top air layer thereof;
(3) the wet resistance that deducts air layer obtains the wet resistance of tested fabric.
Adopt in described step (2)
Obtain the wet resistance of tested fabric and top air layer thereof, wherein: R
eIt is the total wet resistance of tested fabric and top air layer; The tested fabric test area of A; P
ufIt is the saturation vapour pressure of tested fabric lower surface under tested fabric underlaying surface temperature; P
aIt is the saturation vapour pressure of environment under environment temperature; P
wBe in water container surface temperature control at t
wThe time saturation vapour pressure; RH
sThe relative humidity of tested fabric lower surface; RH
aThe relative humidity of environment; E is the heat of vaporization of water, E=0.675Wh/g during 30 ° of C; G is the evaporated quantity of water by tested fabric, G=π d
2Δ h, d are vertical feed pipe interior diameters; ⊿ h is unit interval water level falling head.
The wet resistance of the air layer in described step (3) is adopted
The wet resistance of the air layer that obtains, wherein: R
e0The wet resistance of air layer, Pam
2/ W; A
0Water-gage area in water container, m
2P
wThat the water surface temperature is controlled at t
wThe time saturation vapour pressure, Pa; G
0Can make its surface temperature identical with tested fabric temperature by the water that heats in a Flat bottom container, the evaporation capacity of unit of account chronomere area obtains, g/m
2h。
Beneficial effect
Owing to having adopted above-mentioned technical scheme, the present invention compared with prior art, have following advantage and good effect: the present invention adopts microclimate instrument to test, fabric does not directly contact with perspiration skin, but form a micro climate space together with ring-like wall, a temperature sensor detects the surface temperature of perspiration simulated skin, and another temperature sensor and relative humidity sensor are placed in temperature and the relative humidity of tested fabric below detection fabric lower surface.After system reached stable state, the volume of perspiration that the water slippage in feed pipe in the unit interval namely equals simulated skin also equaled the vapor transfer rate by tested fabric, and therefore, the characteristics of this microclimate instrument maximum are exactly the evaporated quantity of water that can directly measure by tested fabric.Recorded temperature and the relative humidity of fabric lower surface in addition, and the temperature of environment and relative humidity, hinder according to wetting the wet resistance that formula can directly be calculated fabric and top air layer thereof, deduct the wet resistance of air layer, be the wet resistance of fabric itself.Because the tested fabric of the method does not directly contact with perspiration skin, the aqueous water that skin is separated out can not directly be immersed in fabric, and therefore, the wet resistance that the method records is the wet resistance that pure moisture sees through fabric.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the wet resistance of hollow gas-bearing formation of the present invention measurement mechanism schematic diagram.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used for explanation the present invention and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiments of the present invention relate to a kind of microclimate instrument for measuring the wet resistance of fabric, as shown in Figure 1, comprise heating disk 3 and vertical feed pipe 13, described heating disk 3 tops are provided with sweating simulation skin 9, and described vertical feed pipe 13 passes into water the cavity that heats between disk 3 and simulated skin 9; Described tested fabric 8 is unsettled to be put above described sweating simulation skin 9, and described heating disk 3 belows are provided with the heating wire 2 for heating; Described sweating simulation skin 9 surfaces are provided with the first temperature sensor 5, and described tested fabric 8 lower surfaces are provided with the second temperature sensor 6 and humidity sensor 7; Described the first temperature sensor 5, the second temperature sensor 6 and humidity sensor 7 all are connected with described TT﹠C system, and described TT﹠C system is used for controlling described heating wire 2 heating.The outer muff 12 that is provided with of described heating disk 3, described tested fabric 8 are by described muff 12 and support that cross 11 is unsettled to be put above described sweating simulation skin 9.Described heating disk also is provided with insulating lid 13 times, and described insulating lid 1 is provided with three-temperature sensor 4, and this three-temperature sensor 4 is connected with described TT﹠C system.Wherein, described sweating simulation skin 9 is arch, and adopts sealing isolation gas-bearing formation 10 technology.
Using method of the present invention comprises the following steps: utilize heating wire to heat, make microclimate instrument be in steady state (SS); According to temperature and the relative humidity of fabric lower surface, and the temperature of environment and relative humidity, calculate the wet resistance of tested fabric and top air layer thereof; The wet resistance that deducts air layer obtains the wet resistance of tested fabric.
Use the microclimate instrument in the present invention, fabric does not directly contact with perspiration skin, but form a micro climate space together with ring-like wall, a temperature sensor detects the surface temperature of perspiration simulated skin, and another temperature sensor and relative humidity sensor are placed in temperature and the relative humidity of tested fabric below detection fabric lower surface.After system reached stable state, the volume of perspiration that the water slippage in feed pipe in the unit interval namely equals simulated skin also equaled the vapor transfer rate by tested fabric, and therefore, the characteristics of this microclimate instrument maximum are exactly the evaporated quantity of water that can directly measure by tested fabric.Recorded temperature and the relative humidity of fabric lower surface in addition, and the temperature of environment and relative humidity, hinder according to wetting the wet resistance that formula can directly be calculated fabric and top air layer thereof, deduct the wet resistance of air layer, be the wet resistance of fabric itself.Because the tested fabric of the method does not directly contact with perspiration skin, the aqueous water that skin is separated out can not directly be immersed in fabric, and therefore, the wet resistance that the method records is the wet resistance that pure moisture sees through fabric.
The microclimate instrument that the present invention uses uses PTFE microporous barrier composite material as sweating simulation skin, and be fixed on above aluminum heating disk, vertical feed pipe passes into cavity between disk and simulated skin with water, and due to the cause of the pressure of water, simulated skin expand into arch form.During work, the simulated skin medial temperature is controlled at 35 ℃, and aqueous water is separated out by the microporous barrier of simulated skin and evaporated formation " sweat gas ".Micro climate space between simulated skin and tested fabric, because simulated skin is arch form, if the on all four words of skin temperature, due to center section from the fabric sample close to, can cause fabric sample central temperature higher than all round, the present invention uses sealing isolation gas-bearing formation technology in simulated skin, reduced the temperature of simulated skin convex center, makes the surface temperature of fabric sample poor 1 ℃ of left and right.Simultaneously the micro climate space is in steady-state process, and the distribution of its wet concentration is stable substantially, by detecting any temperature and relative humidity of fabric lower surface, just can obtain the wet concentration value below whole fabric sample.The total wet resistance of fabric utmost point upper surface air layer can be calculated as:
Wherein: R
eThe total wet resistance of fabric and top air layer, P
aM
2/ W; A fabric test area, m
2t
wThe temperature of fabric lower surface, ℃; t
aEnvironment temperature, ℃; P
ufIt is temperature t
wThe saturation vapour pressure of lower fabric lower surface, Pa; P
aIt is temperature t
aThe saturation vapour pressure of lower environment, Pa; P
wBe in water container surface temperature control at t
wThe time saturation vapour pressure, Pa; RH
sThe relative humidity of fabric lower surface, %; RH
aThe relative humidity of environment, %; E is the heat of vaporization of water, and in the time of 30 ℃, E is 0.675Wh/g; G is the evaporated quantity of water by tested fabric, Pam
2/ W; G=π d
2Δ h, d are vertical feed pipe interior diameters, m; ⊿ h is unit interval water level falling head, m.
As shown in Figure 2, make its surface temperature identical with fabric style temperature by the water that heats in a Flat bottom container, the evaporation capacity of unit of account chronomere area just can be calculated the wet resistance of air layer.
Wherein: R
e0The wet resistance of air layer, Pam
2/ W; A
OWater-gage area in water container, m
2P
wThat the water surface temperature is controlled at t
wThe time saturation vapour pressure, Pa, G
0That water container is controlled at t at bucket temperature
wThe time evaporated quantity of water, g/h, E are the heats of vaporization of water, in the time of 30 ℃, E is 0.675Wh/g.
The wet resistance R of fabric sample
efFor: R
ef=R
e-R
e0
With reference to relevant wet resistance testing standard, 20 ± 0.5 ℃ of temperature, relative humidity is under 65% ± 3% constant temperature and humidity condition, the fabric sample top of microclimate instrument is applied the wind speed of 1 ± 0.3m/s, the medial temperature of simulated skin is controlled at 35 ℃, after system balancing, recording the water level falling head is 53mm, and the temperature of fabric lower surface is 30 ℃, relative humidity has reached 100%, the internal diameter of known feed pipe is 6mm, and according to above-mentioned formula (1), the total wet resistance of fabric and top air layer is 54Pam
2/ W.Under the test condition identical with microclimate instrument, recording evaporated quantity of water is 680g/m2h according to water container, and the wet resistance of air layer is 4Pam
2/ W, the wet resistance of fabric sample is 50Pam
2/ W.
Be not difficult to find, the present invention adopts microclimate instrument to test, fabric does not directly contact with perspiration skin, but form a micro climate space together with ring-like wall, a temperature sensor detects the surface temperature of perspiration simulated skin, and another temperature sensor and relative humidity sensor are placed in temperature and the relative humidity of tested fabric below detection fabric lower surface.After system reached stable state, the volume of perspiration that the water slippage in feed pipe in the unit interval namely equals simulated skin also equaled the vapor transfer rate by tested fabric, and therefore, the characteristics of this microclimate instrument maximum are exactly the evaporated quantity of water that can directly measure by tested fabric.Recorded temperature and the relative humidity of fabric lower surface in addition, and the temperature of environment and relative humidity, hinder according to wetting the wet resistance that formula can directly be calculated fabric and top air layer thereof, deduct the wet resistance of air layer, be the wet resistance of fabric itself.Because the tested fabric of the method does not directly contact with perspiration skin, the aqueous water that skin is separated out can not directly be immersed in fabric, and therefore, the wet resistance that the method records is the wet resistance that pure moisture sees through fabric.
Claims (8)
1. one kind is used for measuring the wet microclimate instrument that hinders of fabric, comprise heating disk (3) and vertical feed pipe (13), it is characterized in that, described heating disk (3) top is provided with sweating simulation skin (9), and described vertical feed pipe (13) passes into water in the water-filling district of heating between disk (3) and simulated skin (9); Described tested fabric (8) is unsettled to be put in described sweating simulation skin (9) top, is provided with the heating wire (2) for heating below described heating disk (3); Described sweating simulation skin (9) surface is provided with the first temperature sensor (5), and described tested fabric (8) lower surface is provided with the second temperature sensor (6) and humidity sensor (7); Described the first temperature sensor (5), the second temperature sensor (6) and humidity sensor (7) all are connected with described TT﹠C system, and described TT﹠C system is used for controlling described heating wire (2) heating.
2. according to claim 1 for measuring the wet microclimate instrument that hinders of fabric, it is characterized in that, the outer muff (12) that is provided with of described heating disk (3), described tested fabric (8) are by described muff (12) and support that cross (11) is unsettled to be put above described sweating simulation skin (9).
3. the microclimate instrument for measuring the wet resistance of fabric according to claim 1, is characterized in that, described sweating simulation skin (9) is arch, and adopt sealing isolation gas-bearing formation (10) technology.
4. the microclimate instrument for measuring the wet resistance of fabric according to claim 1, is characterized in that, described sweating simulation skin (9) is PTFE microporous barrier compound fabric.
5. the using method of the microclimate instrument for measuring the wet resistance of fabric as described in arbitrary claim in claim 1-4, is characterized in that, comprises the following steps:
(1) utilize heating wire to heat, make microclimate instrument be in steady state (SS);
(2) according to the evaporated quantity of water by fabric, the temperature of fabric lower surface and relative humidity, and the temperature of environment and relative humidity are calculated the wet resistance of tested fabric and top air layer thereof;
(3) the wet resistance that deducts air layer obtains the wet resistance of tested fabric.
6. using method according to claim 5, is characterized in that, when in described step (1), microclimate instrument was in steady state (SS), the simulated skin medial temperature was controlled at 35 ℃.
7. using method according to claim 5, is characterized in that, adopts in described step (2)
Obtain the wet resistance of tested fabric and top air layer thereof, wherein: R
eIt is the total wet resistance of tested fabric and top air layer; The tested fabric test area of A; P
ufIt is the saturation vapour pressure of tested fabric lower surface under tested fabric underlaying surface temperature; P
aIt is the saturation vapour pressure of environment under environment temperature; P
wBe in water container surface temperature control at t
wThe time saturation vapour pressure; RH
sThe relative humidity of tested fabric lower surface; RH
aThe relative humidity of environment; E is the heat of vaporization of water, E=0.675Wh/g during 30 ° of C; G is the evaporated quantity of water by tested fabric, G=π d
2Δ h, d are vertical feed pipe interior diameters; ⊿ h is unit interval water level falling head.
8. using method according to claim 5, is characterized in that, adopts in described step (3)
The wet resistance of the air layer that obtains, wherein: R
e0It is the wet resistance of air layer; A
0It is water-gage area in water container; P
wThat the water surface temperature is controlled at t
wThe time saturation vapour pressure; G
0Can make its surface temperature identical with tested fabric temperature by the water that heats in a Flat bottom container, the evaporation capacity of unit of account chronomere area obtains.
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| CN2013100467419A CN103134914A (en) | 2013-02-05 | 2013-02-05 | Microclimate instrument for measuring fabric moisture resistance and method thereof |
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| CN2013100467419A CN103134914A (en) | 2013-02-05 | 2013-02-05 | Microclimate instrument for measuring fabric moisture resistance and method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866170A (en) * | 2016-05-27 | 2016-08-17 | 东华大学 | Sensor device for simulating heat flux density on surface of skin for fire protection clothes testing |
| CN107153080A (en) * | 2017-07-03 | 2017-09-12 | 四川省皮革研究所 | It is a kind of into footwear thermal resistance, the test device of dampness and method of testing |
| CN108801871A (en) * | 2018-04-13 | 2018-11-13 | 北京航空航天大学 | A kind of device using membrane separation technique simulated skin sweating |
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| CN101526457A (en) * | 2009-03-10 | 2009-09-09 | 东华大学 | Method for testing wet resistance of fabric |
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2013
- 2013-02-05 CN CN2013100467419A patent/CN103134914A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101526457A (en) * | 2009-03-10 | 2009-09-09 | 东华大学 | Method for testing wet resistance of fabric |
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| 吴基作 等: "纺织品热湿传递性测试装置", 《印染》, no. 4, 15 February 2010 (2010-02-15) * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866170A (en) * | 2016-05-27 | 2016-08-17 | 东华大学 | Sensor device for simulating heat flux density on surface of skin for fire protection clothes testing |
| CN105866170B (en) * | 2016-05-27 | 2018-08-03 | 东华大学 | A kind of sensor device of fireproof clothes test simulated skin surface heat flux |
| CN107153080A (en) * | 2017-07-03 | 2017-09-12 | 四川省皮革研究所 | It is a kind of into footwear thermal resistance, the test device of dampness and method of testing |
| CN107153080B (en) * | 2017-07-03 | 2023-07-21 | 四川省皮革研究所 | Testing device and testing method for thermal resistance and wet resistance of finished shoe |
| CN108801871A (en) * | 2018-04-13 | 2018-11-13 | 北京航空航天大学 | A kind of device using membrane separation technique simulated skin sweating |
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Application publication date: 20130605 |