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GB/T 45362-2025: Textiles - Determination of thermal effusivity of fabrics - Modified transient plane source method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 45362-2025: Textiles - Determination of thermal effusivity of fabrics - Modified transient plane source method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT45362-2025 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.080.30 CCS W 04 Textiles - Determination of thermal effusivity of fabrics - Modified transient plane source method Issued on: FEBRUARY 28, 2025 Implemented on: SEPTEMBER 01, 2025 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Principle... 5 5 Test instruments... 5 6 Specimen preparation... 7 7 Standard atmosphere for humidity control and testing... 7 8 Test steps... 7 9 Result calculation... 8 10 Test report... 8ForewordThis document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents". Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing authority shall not be held responsible for identifying any or all such patent rights. This document was proposed by China National Textile and Apparel Council. This document shall be under the jurisdiction of National Technical Committee on Textiles of Standardization Administration of China (SAC/TC 209). The drafting organizations of this document. Ningbo Haishi Textile Technology Co., Ltd., Shenzhen Shangshi Technology Co., Ltd., Anta (China) Co., Ltd., Ningbo Customs Technology Center, Guangdong Jusheng New Materials Technology Co., Ltd., Shaoxing Taiding Graphene Technology Co., Ltd., China Textile Standard Inspection and Certification Co., Ltd., Fujian Yubang Textile Technology Co., Ltd., Phase Change Energy Storage (Beijing) Technology Co., Ltd., Zhejiang Zhuogu Clothing Co., Ltd., Jiangyin Heilan Technology Co., Ltd., China University of Metrology, Zhejiang Sci- Tech University, Ningbo Institute of Inspection and Quarantine Science and Technology (Ningbo National Inspection Trade Facilitation Service Center), Dandao Technology Development (Guangdong) Co., Ltd., Youngor Garment Holdings Co., Ltd., Wuyi University. Main drafters of this document. Ren Qingqing, Ma Leilei, Feng Rui, Fu Kejie, Zheng Min, Tan Wanchang, Yan Ying, Wang Qingmiao, Gao Quan, Li Zhengrong, Huang Qi, Wu Xiaohang, Yao Ruimin, Zou Jie, Ying Zhaohui, Wu Ningxi, Huang Gang, Fu Daodan, Cui Kai. Textiles - Determination of thermal effusivity of fabrics - Modified transient plane source method1 ScopeThis document describes the method for testing the thermal effusivity of fabrics using a modified transient plane source method. This document is applicable to woven fabrics, knitted fabrics and nonwoven fabrics. For fabrics containing fillings, refer to this document.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 3820, Determination of thickness of textiles and textile products 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 values3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply. 3.1 modified transient plane source; MTPS A device with a single-sided planar heat source and a heating guard ring mounted perpendicular to the planar heat source, which allows a transient heat pulse to enter the sample by contacting one side of the specimen. 3.2 thermal effusivity It characterizes the ability of one material to exchange heat when in contact with another material. NOTE. The definition of thermal effusivity is shown in formula (1).6 Specimen preparationIf the single layer thickness of the specimen reaches or exceeds 1.0 mm, take 5 specimens from the sample to be tested. If the single layer thickness of the specimen is less than 1.0 mm, take 5 groups of combined specimens from the sample to be tested. The thickness of each group of combined specimens shall reach or exceed 1.0 mm. Take several additional specimens from the sample to be tested. When sampling, ensure that no two specimens contain the same yarn. The size of the specimen shall be able to completely cover the sensor area. NOTE. Thicknesses of 1.0 mm and above ensure that heat flow does not penetrate its maximum test penetration thickness during testing. Ensure that even if the thermal storage coefficient of the fabric is high, the penetration depth of heat flow during testing remains inside the fabric.7 Standard atmosphere for humidity control and testingThe humidity control and test standard atmosphere shall be carried out in accordance with the provisions of GB/T 6529.The specimen shall be humidified and balanced before the test. During the test, air flow shall be minimized to reduce temperature fluctuations.8 Test steps8.1 Place one specimen or a group of composite specimens with the front side facing upwards over the sensor of the modified transient plane source and completely cover the sensor. For composite specimens, each adjacent layer is placed at an angle of 30° to ensure that each layer of the specimen is not aligned with the adjacent layers. 8.2 Place a 500 g standard weight (pressure of 20 kPa) on top of the specimen to ensure that the specimen is in close contact with the sensor. If the specimen cannot be in close contact with the sensor under this pressure or after consultation between the relevant parties, other pressures may be selected. Use a pressurizing device to apply pressure and indicate this in the report. 8.3 Start the test. Provide a constant instantaneous power pulse to the heater and the heating guard ring, so that the temperature of the sample surface rises by 1℃~3℃ within 1 s~3 s. 8.4 Record the thermal effusivity of the specimen. 8.5 Allow the specimen and the apparatus to cool to ambient temperature. NOTE. The cooling time usually does not exceed 1 min. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 45362-2025 be delivered?Answer: The full copy PDF of English version of GB/T 45362-2025 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 45362-2025_English with my colleagues?Answer: Yes. 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