GB/T 35263-2017 English PDF (GB/T35263-2017)

GB/T 35263-2017: Textiles -- Testing and evaluation for cool feeling in contact instant
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GB/T 35263-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30
W 04
Textiles - Testing and evaluation for cool feeling in
contact instant
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: JULY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Principle ... 5 
5 Test equipment ... 5 
6 Standard atmosphere for humidity conditioning and test ... 6 
7 Preparation of specimen ... 7 
8 Test procedure ... 7 
9 Result calculation ... 7 
10 Assessment ... 7 
11 Test report ... 8 
Textiles - Testing and evaluation for cool feeling in
contact instant
1 Scope
This standard specifies the testing and evaluation methods for the instant
cooling performance of textiles in contact with the skin.
This standard applies to all kinds of fabrics and their products.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Contact transient cool feeling
When the skin is in contact with fabrics below its temperature for an instant,
causing rapid loss of heat on the surface of the skin and an instantaneous
drop in temperature, forming a cool feeling by reflecting the temperature-
sensitive nerve endings in the skin to the brain.
3.2
Contact cool feeling coefficient
qmax
When the thermal detection plate whose temperature is higher than the
7 Preparation of specimen
Cut 5 representative specimens. The size of each specimen is about 200 mm
× 200 mm. Sampling shall avoid defects and wrinkles that affect the test results.
8 Test procedure
8.1 Set the temperature of the sample loading platform to (20 ± 0.5) °C. Spread
the specimen flat on the sample loading platform, with the fabric surface in
contact with the skin facing up.
8.2 Set the temperature of the thermal detection board to (35 ± 0.5) °C; the
temperature difference (ΔT) from the sample loading platform is 15 °C. If other
temperatures are used, they must be noted in the report.
8.3 After the temperature of the thermal detection plate reaches the
temperature set in 8.2 and remains stable, cut off the heat source of the thermal
detection plate and quickly place it vertically on the specimen, so that the
surface of the copper plate is in contact with the fabric. Record the measured
qmax. Keep the result to 3 decimal places, in Joule per square centimeter second
[J/(cm2·s)].
8.4 Determine all other specimens according to the steps 8.1 ~ 8.3.
Note: The test time is generally within 10 s.
9 Result calculation
Calculate the average value of qmax of 5 specimens. The result shall be rounded
to two decimal places according to GB/T 8170.
10 Assessment
If necessary, evaluate the instant cool feeling of the sample. When ΔT = 15 °C,
the evaluation index is as shown in Table 1.
GB/T 35263-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30
W 04
Textiles - Testing and evaluation for cool feeling in
contact instant
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: JULY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Principle ... 5 
5 Test equipment ... 5 
6 Standard atmosphere for humidity conditioning and test ... 6 
7 Preparation of specimen ... 7 
8 Test procedure ... 7 
9 Result calculation ... 7 
10 Assessment ... 7 
11 Test report ... 8 
Textiles - Testing and evaluation for cool feeling in
contact instant
1 Scope
This standard specifies the testing and evaluation methods for the instant
cooling performance of textiles in contact with the skin.
This standard applies to all kinds of fabrics and their products.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Contact transient cool feeling
When the skin is in contact with fabrics below its temperature for an instant,
causing rapid loss of heat on the surface of the skin and an instantaneous
drop in temperature, forming a cool feeling by reflecting the temperature-
sensitive nerve endings in the skin to the brain.
3.2
Contact cool feeling coefficient
qmax
When the thermal detection plate whose temperature is higher than the
7 Preparation of specimen
Cut 5 representative specimens. The size of each specimen is about 200 mm
× 200 mm. Sampling shall avoid defects and wrinkles that affect the test results.
8 Test procedure
8.1 Set the temperature of the sample loading platform to (20 ± 0.5) °C. Spread
the specimen flat on the sample loading platform, with the fabric surface in
contact with the skin facing up.
8.2 Set the temperature of the thermal detection board to (35 ± 0.5) °C; the
temperature difference (ΔT) from the sample loading platform is 15 °C. If other
temperatures are used, they must be noted in the report.
8.3 After the temperature of the thermal detection plate reaches the
temperature set in 8.2 and remains stable, cut off the heat source of the thermal
detection plate and quickly place it vertically on the specimen, so that the
surface of the copper plate is in contact with the fabric. Record the measured
qmax. Keep the result to 3 decimal places, in Joule per square centimeter second
[J/(cm2·s)].
8.4 Determine all other specimens according to the steps 8.1 ~ 8.3.
Note: The test time is generally within 10 s.
9 Result calculation
Calculate the average value of qmax of 5 specimens. The result shall be rounded
to two decimal places according to GB/T 8170.
10 Assessment
If necessary, evaluate the instant cool feeling of the sample. When ΔT = 15 °C,
the evaluation index is as shown in Table 1.