CN115078636A - Ready-made clothes heat preservation performance test method - Google Patents
Ready-made clothes heat preservation performance test method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000011056 performance test Methods 0.000 title claims description 6
- 238000004321 preservation Methods 0.000 title abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 93
- 238000011156 evaluation Methods 0.000 claims abstract description 22
- 230000007613 environmental effect Effects 0.000 claims abstract description 12
- 238000010792 warming Methods 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 230000001276 controlling effect Effects 0.000 claims abstract description 5
- 230000037311 normal skin Effects 0.000 claims abstract description 5
- 230000014759 maintenance of location Effects 0.000 claims description 15
- 230000035807 sensation Effects 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 11
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- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 5
- 210000001015 abdomen Anatomy 0.000 claims description 4
- 210000001061 forehead Anatomy 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000001143 conditioned effect Effects 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 description 12
- 239000004753 textile Substances 0.000 description 11
- 239000000835 fiber Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 229920000742 Cotton Polymers 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 210000003746 feather Anatomy 0.000 description 4
- 238000013100 final test Methods 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- -1 coatings Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000010985 leather Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011185 multilayer composite material Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0001—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00 by organoleptic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/367—Fabric or woven textiles
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Abstract
The invention relates to a method for testing the warming performance of ready-made clothes, which comprises the steps of regulating and controlling a climatic chamber, enabling a tested individual wearing a sample to reach a steady state at an environmental temperature, and obtaining the average temperature of the surface of the skin according to a subjective evaluation test of the tested individual wearing the sample in a steady state environment within a certain time; regulating and controlling the artificial climate bin and enabling the warm-body dummy wearing the sample to reach a stable state at the ambient temperature, and obtaining the corresponding internal temperature of the warm-body dummy when the warm-body dummy wearing the sample maintains the normal skin surface temperature of the human body within a certain time period under the stable state; and if the average temperature of the skin surface and the internal temperature of the warm-body dummy are both in the standard range, judging that the skin surface is qualified, and otherwise, judging that the skin surface is unqualified. The invention combines the internal temperature corresponding to the maintaining surface temperature measured under the upper half body steady state of the warm body dummy and the skin surface average temperature measured by the weighted average value of each subarea under the real human steady state environment, thereby realizing simple, visual, objective and accurate evaluation of the heat preservation performance of the ready-made clothes under different environment temperature conditions.
Description
Technical Field
The invention belongs to the technical field of ready-made clothes performance testing, and particularly relates to a method for testing the heat retention performance of ready-made clothes.
Background
The warmth retention property is one of basic performance indexes in the wearing performance of the clothes. The detection method of the warmth retention property is divided into a flat plate method, an evaporative heat plate method and a warm dummy method according to the principle.
Domestic relevant detection standards: GB/T35762 and 2017 'textile heat transfer performance test method flat method' is suitable for various textile fabrics and products thereof, coating fabrics, leather, multilayer composite materials and the like which can be executed by reference; GB/T11048-; GB/T18398-2001 'garment thermal resistance test method body warming dummy method' is suitable for the thermal resistance of various garments; GTTC/GF TM 006-containing 2018 garment thermal insulation performance determination prosthesis method is suitable for testing the thermal insulation performance of adult garments.
International detection standards: ASTM D1518-; ISO 11092:2014 measurement of thermal resistance and wet resistance under steady-state conditions of physiological comfort of textiles (evaporative heat plate method) is suitable for various textile products such as clothing, bedding, sleeping bags, decorative fabrics and the like, and textile fabrics, films, coatings, foams, leather and composite materials for manufacturing the textile products; EN 31092:1993/Al 2012(E) determination of thermal resistance and wet resistance of textiles under a steady-state condition (evaporative heat plate method), wherein the method is suitable for various textile products such as clothes, quilts, sleeping bags, decorative fabrics and the like, and textile fabrics, films, coatings, foams, leathers and composite materials for manufacturing the textile products; ASTM F1868-2017 thermal and wet resistance test methods for garment materials the evaporative heating plate method is suitable for making textile fabrics, films, coatings, foams, leather and composites for garment products.
The existing national standard is applied to the test method of the heat retention, wherein a flat plate method and an evaporative heat plate method are suitable for fabrics and semi-finished products, the heat retention of the finished clothing product cannot be comprehensively reflected, and the environmental conditions (the temperature is 20 ℃ and the humidity is 65%) in the two test methods are inconsistent with the actual application scene, so that the heat retention performance under different environmental conditions cannot be reflected; in addition, the thickness of the down jacket is generally not more than 30mm when the evaporative heat plate method is used for testing, so that the down jacket is not suitable for being used in a thicker down jacket.
The body warming dummy method is suitable for down garment, can simulate the actual wearing environment of a consumer, and is the most scientific and objective method for testing the heat retention of the garment at present, however, the existing body warming dummy method cannot comprehensively reflect the heat retention performance of different types of human bodies in the actual wearing process, and in addition, the heat retention is represented by testing indexes such as thermal resistance, wet resistance and the like, so that on one hand, the consumer has difficulty in understanding the complex indexes; in addition, because of more influence factors and limited range, the accuracy of the test result is influenced. Therefore, how to accurately evaluate the heat retention performance of the ready-made clothes under various environmental conditions in a simple and intuitive manner and in a manner that consumers can understand the ability is a hot spot of research of researchers at present.
Disclosure of Invention
The invention aims to provide a method for testing the heat preservation performance of ready-made clothes, which is simple and visual and can verify and evaluate the heat preservation performance of the ready-made clothes by testing the internal temperature of the ready-made clothes worn on a warm-body dummy under different environmental temperature conditions and combining the actual wearing experience of a real person.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for testing the thermal insulation performance of ready-made clothes comprises the following steps:
s1, regulating and controlling the artificial climate chamber to reach a set environment temperature condition, enabling the tested individual wearing the sample to reach a stable state at the environment temperature, and obtaining the average temperature of the skin surface according to the subjective evaluation test of the tested individual wearing the sample in a stable environment within a certain time;
s2, regulating the artificial climate bin to reach a set environment temperature condition and enabling the warm-body dummy wearing the sample to reach a stable state at the environment temperature, and obtaining the corresponding internal temperature of the warm-body dummy when the warm-body dummy wearing the sample maintains the normal skin surface temperature of the human body within a certain time period under the stable state environment;
s3, if the average temperature of the skin surface and the internal temperature of the warm-up dummy are both in the standard range, judging that the sample is qualified in heat retention, otherwise, judging that the sample is unqualified in heat retention.
Preferably, the step S1 is specifically: after a tested individual wears a sample and enters the artificial climate chamber, standing still, and starting subjective evaluation test after the surface skin temperature of the tested individual and the temperature of the artificial climate chamber are stable for a period of time; multiple subjects per sample were subjected to subjective evaluation tests.
Preferably, the subjective evaluation test is carried out after the surface skin temperature and the artificial climate chamber temperature of the tested individual are stable for 5min to 10 min.
Preferably, the subjective evaluation test specifically comprises:
dividing the heat sensation characteristics of the tested individual into a symmetrical five-level scale with two poles, which are respectively: cold, cool, comfortable, warm and hot, and the tested individuals are unified in evaluation scale before testing;
recording a subjective test result at regular intervals within 30-60 min according to the requirement of a thermal sensation scale, and recording the real-time temperature of each corresponding subarea during the last thermal sensation; if two poles of the thermal sensing ruler are in the same period, the test is immediately stopped, and the real-time temperature of each corresponding subarea during thermal sensing at the moment is recorded, and each subarea is provided with a temperature monitoring and transmitting device;
the average skin surface temperature of each subject is a weighted average of the real-time temperatures of the respective sub-areas of the subject, and the calculation formula is shown in formulas 1 and 2:
in the formula:
the average temperature (DEG C) of the surface of the human skin at a certain moment; ti is the real-time temperature (DEG C) of the ith partition part of the human body; ni is the partition weight of the ith partition of the human body; an is the surface net surface area (m) of the upper half of the human body 2 ) (ii) a Ai is the body surface area (m) of the i-th subarea part of the human body 2 )。
Preferably, the partition is to partition the upper half of the human body into a forehead, a nape, a shoulder, a chest, a back, an abdomen, a waist, an upper arm and a lower arm according to a three-dimensional stereo cutting method.
Preferably, the subjective evaluation test of each subject is recorded every 5min to 10 min.
Preferably, the step S2 is specifically: at one sideIn the test period, after the warm dummy wearing the sample is heated to enter the dynamic heat balance, the surface temperature of each area is kept unchanged, and the environmental temperature and the internal temperature t of the warm dummy are detected and recorded once every certain time within 30-60 min i Then, the average value is calculated according to equation 3
In the formula: t is t i The temperature (DEG C) of the inside of the warm-body dummy recorded at the ith time in the test period is recorded; i is the number of test records in a test period.
Preferably, the environmental temperature and the internal temperature of the thermal manikin are detected and recorded once every 5min-10 min; the same conditioned sample is subjected to repeated putting-on and taking-off tests for 3 test cycles, wherein the time interval between the two test cycles is at least 15 minutes.
Preferably, the upper half shell of the thermal manikin is made of a carbon fiber material, graphene thin-layer heating films which are respectively and electrically connected with a constant temperature control system are respectively attached to the surface areas of the upper half shell of the thermal manikin, and a temperature monitoring and transmitting device used for monitoring the real-time temperature inside the thermal manikin is arranged inside the thermal manikin.
Preferably, when the ambient temperature is 5 ℃, the standard range of the warmth retention of the ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of the men's ready-made garment is more than or equal to 18 +/-0.5 ℃, and the internal temperature of the women's ready-made garment is more than or equal to 22 +/-0.5 ℃; when the ambient temperature is-5 ℃, the standard range of the warmth retention of ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of the men's ready-made garment is more than or equal to 18 +/-0.5 ℃, and the internal temperature of the women's ready-made garment is more than or equal to 22 +/-0.5 ℃; when the ambient temperature is-15 ℃, the standard range of the warmth retention of ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of a man garment is more than or equal to 9 +/-0.5 ℃, and the internal temperature of a woman garment is more than or equal to 14 +/-0.5 ℃; when the ambient temperature is-25 ℃, the standard range of the warmth retention of ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of the men's ready-made garment is more than or equal to 4 +/-0.5 ℃, and the internal temperature of the women's ready-made garment is more than or equal to 9 +/-0.5 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the method for testing the heat preservation performance of the ready-made clothes combines the internal temperature corresponding to the maintaining surface temperature measured under the upper half body steady state of the warm-body dummy and the skin surface average temperature measured by the weighted average value of each subarea under the wearing and steady state environment of the real person, thereby realizing simple, visual, objective and accurate evaluation of the heat preservation performance of the ready-made clothes sample under different environment temperature conditions, and simultaneously truly simulating the test of the heat preservation aspect of the ready-made clothes of different types and specifications when the real person wears the clothes under different environment temperature actual application scenes.
The average temperature of the skin surface and the internal temperature of the warm-up dummy can be directly obtained from the temperature monitoring and transmitting device, and the device is simple and visual and is beneficial to consumers to understand and judge the warmth retention of the ready-made clothes.
Detailed Description
A method for testing the thermal insulation performance of ready-made clothes comprises the following steps: s1, regulating and controlling the artificial climate chamber to reach a set environment temperature condition, enabling the tested individual wearing the sample to reach a stable state at the environment temperature, and obtaining the average temperature of the skin surface according to the subjective evaluation test of the tested individual wearing the sample in a stable environment within a certain time; s2, regulating the artificial climate bin to reach a set environment temperature condition and enabling the warm-body dummy wearing the sample to reach a stable state at the environment temperature, and obtaining the corresponding internal temperature of the warm-body dummy when the warm-body dummy wearing the sample maintains the normal skin surface temperature of the human body within a certain time period under the stable state environment; s3, if the average temperature of the skin surface and the internal temperature of the warm-up dummy are both in the standard range, judging that the sample is qualified in heat retention, otherwise, judging that the sample is unqualified in heat retention.
Wherein step S1 is specifically as follows:
(1) thermal sensing scale
Dividing the heat sensation characteristics of the tested individual into a symmetrical five-level scale with two poles, which are respectively: the hot sensing scale is used for subjectively experiencing in a stable environment through five cups according to cold, cool, comfortable, warm and hot water, so that testers can experience the senses at five different temperatures, and the scales are uniformly evaluated before testing.
(2) Weight of each partition
Dividing the upper half body of the human body into a forehead, a back neck, shoulders, a chest, a back, a front abdomen, a back waist, an upper arm and a lower arm 9 large subarea according to a three-dimensional cutting method, acquiring the body surface area of each subarea part of the upper half body of the human body, and calculating by a formula (1) to obtain each subarea weight of the upper half body of the human body:
in the formula: ni is the partition weight of the ith partition of the human body; an is the surface net surface area (m) of the upper half of the human body 2 ) (ii) a Ai is the body surface area (m) of the i-th subarea part of the human body 2 )。
(3) Skin surface average temperature test
Temperature monitoring and transmitting devices are respectively arranged on the forehead, the nape, the shoulder, the chest, the back, the abdomen, the waist, the upper arm and the lower arm of the human body, and a film platinum resistance thermometer is preferably adopted for monitoring and recording the real-time temperature of the skin surface of each part. The average temperature of the surface of the human skin at a certain moment is the weighted average value of the real-time temperatures of all the subareas, and the calculation formula is as follows (2):
in the formula:
the average temperature (DEG C) of the surface of the human skin at a certain moment; ti is the real-time temperature (DEG C) of the ith division part of the human body.
(4) Subjective evaluation test
The method comprises the following steps of firstly setting the environmental temperature of an artificial climate bin and opening the artificial climate bin, when the environmental temperature of the artificial climate bin reaches the set temperature, a tested individual wears a sample and then stands statically after entering the artificial climate bin, and after the surface skin temperature of the tested individual and the temperature of the artificial climate bin are stabilized for 5-10 min, a subjective evaluation test is started: recording the subjective test result once within 30-60 min (preferably 30min) every 5-10 min (preferably 5min) according to the requirement of a thermal sensation scale, and recording the real-time temperature of each corresponding subarea during the last thermal sensation; if two poles of the thermal sensing ruler are in the same period, the test is immediately stopped, and the real-time temperature of each corresponding subarea during thermal sensing is recorded; for each sample, a number of subjects (typically 5) were subjected to the subjective evaluation test described above, and the test results were taken as the lowest or simple arithmetic mean of the average skin surface temperatures of the number of subjects.
The step S2 is specifically:
(1) preparation warm-up dummy
The upper half body shell of the warm body dummy is made of carbon fiber materials, graphene thin-layer heating films which are respectively and electrically connected with a constant temperature control system are respectively attached to all the surfaces of the upper half body shell, and a temperature monitoring and transmitting device for monitoring the real-time temperature inside the warm body dummy, such as a thermocouple temperature sensor, a resistance temperature sensor or a semiconductor temperature sensor, is arranged inside the warm body dummy. The number of the temperature sensors in the warm-up dummy can be only 1, and the temperature sensors are placed in the center of the upper half of the warm-up dummy, so that the internal temperature of the warm-up dummy is the real-time temperature of the temperature sensors at the moment. In addition, more than two temperature sensors can be arranged and uniformly distributed in the upper half of the warm body dummy, so that the internal temperature of the warm body dummy is the simple arithmetic mean value of the real-time temperatures of the temperature sensors at the moment.
(2) Heating to dynamic heat balance
And placing the warm dummy wearing the sample in the artificial climate bin, opening the heating systems of the artificial climate bin and the warm dummy, and heating until the dynamic thermal balance is achieved, and then testing.
When the warm-body dummy reaches a thermal equilibrium state, the warm-body dummy needs to go through three stages, namely a temperature changing stage, namely that the temperature of the skin on the surface of each subarea part of the warm-body dummy is quickly increased to the vicinity of a set constant temperature point in a balanced state and is maintained within the range of +/-1 ℃ of the constant temperature point, and the internal temperature of the warm-body dummy is changed along with the increase of the temperature of the skin on the surface of each subarea part and the reduction of the environmental temperature; temperature adjusting stage, namely the surface skin temperature of each subarea part of the warm-up dummy is normally maintained to fluctuate within the range of a constant temperature point plus or minus 0.5 ℃, and the change of the internal temperature of the warm-up dummy gradually becomes stable along with the full storage of internal heat; in the balance stage, the surface skin temperature of each subarea part of the warm body dummy is maintained to fluctuate within the range of a constant temperature point +/-0.1 ℃, the temperature is basically kept unchanged, the internal temperature of the warm body dummy also reaches a stable value, and the heat exchange among the warm body dummy, the clothes and the environment really reaches a thermal balance state.
(3) Internal temperature testing
Each test cycle time is 30min to 60min (preferably 30min or 60min) from the dynamic thermal equilibrium being reached. Setting the surface temperature of each area of the thermal manikin to be the normal skin surface temperature of human body such as 33.5 ℃ in each test period, keeping the temperature of each area constant, and detecting and recording the environmental temperature and the internal temperature t of the thermal manikin once every 5-10 min i Then, the average value is calculated according to equation 3
In the formula: t is t i The temperature (DEG C) of the inside of the warm-body dummy recorded at the ith time in the test period is recorded; i is the number of test records in a test period. And (3) repeating the putting-on and taking-off test for the same sample after humidity adjustment for 3 test periods, wherein the time interval between the two test periods is at least 15 minutes, and the simple arithmetic mean value of the 3 test periods is taken as the test result of the internal temperature.
After the average temperature of the surface of the human skin and the internal temperature data of the warm dummy obtained in the subjective test of the sample were obtained by the test, the experimental result judgment was given with reference to the standards as described in table 1.
Table 1: the invention relates to a ready-made clothes heat-preservation function evaluation system
A few specific test cases are given below
Example 1
The test sample of this example was a 175 male fully trained down jacket, cotton feather fill grammage: 120g of a mixture; down filling type: the content of velvet seeds is 75 percent; fabric fiber components: 100% polyester fiber. And (3) testing temperature: 5 ℃ is adopted. 5 tested individuals record subjective test results once every 5min within 30 minutes according to the requirement of a thermal sensation scale, and the final test result of the average temperature of the skin surface takes the lowest value of the 5 tested individuals; the internal temperature was measured for 30min per test cycle and recorded 1 time every 5 min. The results of the determination of the warmth retention of the test sample are shown in the following table:
example 2
The test sample of this example was a male 175 basketball medium-length down jacket, cotton feather fill grammage: 280 g; down filling type: the content of velvet seeds is 75 percent; fabric fiber components: 100% polyester fiber. And (3) testing temperature: -25 ℃.5 tested individuals record subjective test results once every 5min within 30 minutes according to the requirement of a thermal sensation scale, and the final test result of the average temperature of the skin surface takes the lowest value of the 5 tested individuals; the internal temperature was measured for 30min per test cycle and recorded 1 time every 5 min. The results of the determination of the warmth retention of the test sample are shown in the following table:
example 3
The test sample of this example was a 165 women's vitality medium-length down jacket with cotton feather fill grammage: 260g of a total weight of the composition; down filling type: the content of velvet seeds is 75 percent; fabric fiber components: 100% polyester fiber. And (3) testing temperature: -5 ℃.5 tested individuals record a subjective test result every 5min within 30 minutes according to the requirement of a thermal sensation scale, and the final test result of the average temperature of the skin surface takes the lowest value of the 5 tested individuals; the internal temperature was measured for 30min per test cycle and recorded 1 time every 5 min. The results of the determination of the warmth retention of the test sample are shown in the following table:
example 4
The test sample of this example was a 165 woman outdoor medium-length down jacket, cotton feather fill grammage: 130g of the total weight of the mixture; down filling type: the content of velvet seeds is 75 percent; fabric fiber components: 100% polyester fiber. And (3) testing temperature: -15 ℃.5 tested individuals record subjective test results once every 5min within 30 minutes according to the requirement of a thermal sensation scale, and the final test result of the average temperature of the skin surface takes the lowest value of the 5 tested individuals; the internal temperature was measured for 30min per test cycle and recorded 1 time every 5 min. The results of the determination of the warmth retention of the test sample are shown in the following table:
while there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (10)
1. A method for testing the thermal insulation performance of ready-made clothes is characterized by comprising the following steps: the method comprises the following steps:
s1, regulating and controlling the artificial climate chamber to reach a set environment temperature condition, enabling the tested individual wearing the sample to reach a stable state at the environment temperature, and obtaining the average temperature of the skin surface according to the subjective evaluation test of the tested individual wearing the sample in a stable environment within a certain time;
s2, regulating the artificial climate chamber to reach a set environment temperature condition and enabling the warm-body dummy wearing the sample to reach a stable state at the environment temperature, and obtaining the corresponding internal temperature of the warm-body dummy when the warm-body dummy wearing the sample maintains the normal skin surface temperature of the human body in a stable state within a certain time;
s3, if the average temperature of the skin surface and the internal temperature of the warm-up dummy are both in the standard range, judging that the sample is qualified in heat retention, otherwise, judging that the sample is unqualified in heat retention.
2. The ready-made garment thermal performance test method of claim 1, characterized in that: the step S1 specifically includes: after a tested individual wears a sample and enters the artificial climate chamber, standing still, and starting subjective evaluation test after the surface skin temperature of the tested individual and the temperature of the artificial climate chamber are stable for a period of time; multiple subjects per sample were subjected to subjective evaluation tests.
3. The test method for the warming performance of the ready-made clothes according to claim 2, characterized in that: the subjective evaluation test is carried out after the surface skin temperature and the artificial climate chamber temperature of the tested individual are stable for 5min-10 min.
4. The test method for the warming performance of the ready-made clothes according to claim 2, characterized in that: the subjective evaluation test specifically comprises the following steps:
dividing the heat sensation characteristics of the tested individual into a symmetrical five-level scale with two poles, which are respectively: cold, cool, comfortable, warm and hot, and the tested individuals are unified in evaluation scale before testing;
recording a subjective test result at regular intervals within 30-60 min according to the requirement of a thermal sensation scale, and recording the real-time temperature of each corresponding subarea during the last thermal sensation; if two poles of the thermal sensing ruler are in the same period, the test is immediately stopped, and the real-time temperature of each corresponding subarea during thermal sensing is recorded, and each subarea is provided with a temperature monitoring and transmitting device;
the average skin surface temperature of each subject is a weighted average of the real-time temperatures of the respective sub-areas of the subject, and the calculation formula is shown in formulas 1 and 2:
in the formula:
the average temperature (DEG C) of the surface of the human skin at a certain moment; ti is the real-time temperature (DEG C) of the ith partition part of the human body; ni is the partition weight of the ith partition of the human body; an is the surface net surface area (m) of the upper half of the human body 2 ) (ii) a Ai is the body surface area (m) of the i-th subarea part of the human body 2 )。
5. The test method for the warming performance of the ready-made clothes according to claim 4, characterized in that: the partition is to divide the upper half of the human body into a forehead, a back neck, a shoulder, a chest, a back, a front abdomen, a back waist, an upper arm and a lower arm according to a three-dimensional cutting method.
6. The test method for the warming performance of the ready-made clothes according to claim 4, characterized in that: the subjective evaluation test of each tested individual records the subjective test result every 5min-10 min.
7. The ready-made garment thermal performance test method of claim 1, characterized in that: the step S2 specifically includes: in a test period, after the warm dummy wearing the sample is heated to enter dynamic thermal equilibrium, the surface temperature of each area is kept unchanged, and the environmental temperature and the internal temperature t of the warm dummy are detected and recorded once at regular intervals i Then, the average value t is calculated according to equation 3:
in the formula: t is t i The temperature (DEG C) of the inside of the warm-body dummy recorded at the ith time in the test period is recorded; i is the number of test records in a test period.
8. The test method for the warming performance of the ready-made clothes according to claim 7, characterized in that: detecting and recording the ambient temperature and the internal temperature of the thermal manikin once every 5-10 min; the same conditioned sample is subjected to repeated putting-on and taking-off tests for 3 test cycles, wherein the time interval between the two test cycles is at least 15 minutes.
9. The test method for the warming performance of the ready-made clothes according to claim 7, characterized in that: the upper half body shell of the warm body dummy is made of carbon fiber materials, graphene thin-layer heating films which are respectively and electrically connected with a constant temperature control system are respectively attached to the surface areas of the upper half body shell, and a temperature monitoring and transmitting device used for monitoring the real-time temperature inside the warm body dummy is arranged inside the warm body dummy.
10. The ready-made garment thermal performance test method of claim 1, characterized in that:
when the ambient temperature is 5 ℃, the standard range of the warmth retention of ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of the men's ready-made garment is more than or equal to 18 +/-0.5 ℃, and the internal temperature of the women's ready-made garment is more than or equal to 22 +/-0.5 ℃;
when the ambient temperature is-5 ℃, the standard range of the warmth retention of ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of the men's ready-made garment is more than or equal to 18 +/-0.5 ℃, and the internal temperature of the women's ready-made garment is more than or equal to 22 +/-0.5 ℃;
when the ambient temperature is-15 ℃, the standard range of the warmth retention of ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of a man garment is more than or equal to 9 +/-0.5 ℃, and the internal temperature of a woman garment is more than or equal to 14 +/-0.5 ℃;
when the ambient temperature is-25 ℃, the standard range of the warmth retention of ready-made clothes is as follows: the average temperature of the skin surface is 33 +/-1 ℃, the internal temperature of the men's ready-made garment is more than or equal to 4 +/-0.5 ℃, and the internal temperature of the women's ready-made garment is more than or equal to 9 +/-0.5 ℃.
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