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GB/T 26689-2024: Rigid polyurethane cellular plastics used in refrigerators and freezers
Status: Valid GB/T 26689: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 26689-2024 | English | 319 |
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Rigid polyurethane cellular plastics used in refrigerators and freezers
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GB/T 26689-2024
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| GB/T 26689-2011 | English | 169 |
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Rigid polyurethane cellular plastics used in refrigerators and freezers
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GB/T 26689-2011
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PDF similar to GB/T 26689-2024
Basic data | Standard ID | GB/T 26689-2024 (GB/T26689-2024) | | Description (Translated English) | Rigid polyurethane cellular plastics used in refrigerators and freezers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G30 | | Classification of International Standard | 83.100 | | Word Count Estimation | 16,134 | | Date of Issue | 2024-08-23 | | Date of Implementation | 2024-08-23 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 26689-2024: Rigid polyurethane cellular plastics used in refrigerators and freezers---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Rigid polyurethane cellular plastics used in refrigerators and freezers
Rigid polyurethane foam for refrigerators and freezers
ICS 83.100
CCS G30
National Standard of the People's Republic of China
Replaces GB/T 26689-2011
Released on 2024-08-23
2025-03-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface ... Ⅲ
1 Scope ... 1
2 Normative references ... 1
3 Terms and Definitions ... 1
4 Categories ... 1
5 Requirements ... 1
5.1 Appearance ... 1
5.2 Physical and mechanical properties 2
5.3 High and low temperature cycle performance ... 2
6 Test methods ... 2
6.1 State Adjustment ... 2
6.2 Appearance ... 2
6.3 Thermal conductivity ... 2
6.4 Compression strength or compression stress at 10% deformation ... 2
6.5 Dimensional stability ... 3
6.6 Apparent core density ... 3
6.7 Closed-cell ratio ... 3
6.8 Water absorption ... 3
6.9 High and Low Temperature Cycle Performance ... 3
6.10 Bond strength ... 3
7 Inspection Rules ... 3
7.1 Inspection categories ... 3
7.2 Batch and Sampling 4
7.3 Decision Rules 4
Appendix A (Informative) Determination of bond strength ... 5
A.1 Test Instruments 5
A.2 Sample preparation 5
A.3 Test steps 5
A.4 Test results 5
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting is required.
This document replaces GB/T 26689-2011 "Rigid polyurethane foam plastics for refrigerators and freezers" and is consistent with GB/T 26689-2011.
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
Added a chapter on “Terms and Definitions” (see Chapter 3); a)
The product classification has been changed (see Chapter 4, Chapter 3 of the.2011 edition); b)
The product appearance requirements have been changed (see 5.1, 4.1 of the.2011 edition); c)
Changed "thermal conductivity" to "initial thermal conductivity" and changed the corresponding index requirements (see 5.2,.2011 edition
4.2);
d)
Added long-term thermal conductivity performance requirements and test methods (see 5.2 and 6.3); e)
The requirements for compressive strength or 10% compressive stress of deformation have been changed (see 5.2, 4.2 of the.2011 edition); f)
The index requirements for apparent core density have been changed (see 5.2, 4.2 of the.2011 edition); g)
The test method for thermal conductivity has been changed (see 6.3, 5.3 of the.2011 edition); h)
The inspection items for factory inspection and type inspection have been changed (see 7.1, 6.1 of the.2011 edition); i)
Changed product sampling requirements (see 7.2.2, 6.2.2 of the.2011 edition); j)
The judgment rules have been changed (see 7.3, 6.3 of the.2011 edition); k)
Change the "Determination method of bonding strength" from a normative appendix to an informative appendix (see Appendix A, Appendix A of the.2011 edition). l)
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by China Light Industry Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products (SAC/TC 48).
This document was drafted by. Beijing Technology and Business University, Hisense Rongsheng (Guangdong) Refrigerator Co., Ltd., Hongbaoli Group Co., Ltd., Wan
Huahua Group Co., Ltd., Hebei Yadong Chemical Group Co., Ltd., Tianchang Boshi Environmental Protection New Materials Co., Ltd., Midea Group
Co., Ltd., Shandong Aofan New Materials Co., Ltd., Sinochem Blue Sky Honeywell New Materials Co., Ltd., Hangzhou Chongyao Technology Development Co., Ltd.
Company, Shaoxing Chenxing Polyurethane Co., Ltd., Shandong Yiborun New Material Technology Co., Ltd., Shandong Lianchuang Polymer Co., Ltd., Beijing
Building Materials Inspection Institute Co., Ltd., Jiangsu Jianghua Polyurethane Product Quality Inspection Co., Ltd., Sun Yat-sen University, Shandong University,
Yuncheng University.
The main drafters of this document are. Chen Qian, Hu Feng, Xing Yihui, Zhu Xialin, Yuan Haishun, Zhou Hongfu, Gu Haoxian, Zhao Shihu, Shi Qingqing,
Yu Xiaoguan, Song Xinfeng, Yu Rengen, Hao Dekai, Kong Li, Liu Jing, Wu Hao, Zhai Wentao, Wang Guilong, and Wang Jie.
The previous versions of this document and the documents it replaces are as follows.
First published in.2011 as GB/T 26689-2011;
This is the first revision. -
Rigid polyurethane foam for refrigerators and freezers
1 Scope
This document defines the terms and definitions of rigid polyurethane foam plastics for refrigerators and freezers, specifies the classification, requirements, inspection rules, and
The corresponding test methods are described.
This document applies to rigid polyurethane foam for refrigerators and freezers produced by foaming with combined polyols and polyisocyanates as the main raw materials.
material.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies.
in this document.
GB/T 2918 Standard environment for conditioning and testing of plastic specimens
GB/T 6343-2009 Determination of apparent density of foam plastics and rubber
GB/T 8810-2005 Determination of water absorption of rigid cellular plastics
GB/T 8811-2008 Test method for dimensional stability of rigid cellular plastics
GB/T 8813-2020 Determination of compression properties of rigid cellular plastics
GB/T 10295-2008 Determination of steady-state thermal resistance and related properties of thermal insulation materials - Heat flow meter method
GB/T 10799-2008 Determination of open and closed cell volume percentage of rigid cellular plastics
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
low boiling point component
The composition of the blowing agent (except CO2) with a boiling point below 0°C under standard atmospheric pressure.
4 Categories
The products are divided into 3 types according to the type of physical foaming agent used.
Class I─Using cyclopentane as the sole blowing agent.
Category II. Use a mixed blowing agent containing low-boiling point components (the content of low-boiling point components is greater than 1%, calculated based on the combined polyol).
Class III─Using other foaming agents.
5 Requirements
5.1 Appearance
Except for defects caused by tearing off the outer skin, the product should have uniform color and pores, and no obvious defects such as cracks.
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