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GB/T 40052-2021 English PDF

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GB/T 40052-2021: Preservative-treated plywood
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PDF similar to GB/T 40052-2021


Standard similar to GB/T 40052-2021

GB/T 40493   LY/T 1635   LY/T 1636   GB/T 27654   GB/T 27651   

Basic data

Standard ID GB/T 40052-2021 (GB/T40052-2021)
Description (Translated English) Preservative-treated plywood
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B71
Word Count Estimation 8,878
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 40052-2021: Preservative-treated plywood

---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.
Preservative-treated plywood ICS 79.060.10 CCSB71 National Standards of People's Republic of China Anticorrosive plywood Released on 2021-04-30 2021-08-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

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 of Standardization Documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed by the State Forestry and Grassland Administration. This document is under the jurisdiction of the National Timber Standardization Technical Committee (SAC/TC41). Drafting organizations of this document. Timber Conservation Development Center, Dongying Shengji Environmental Engineering Co., Ltd., Anhui Hongsen Hi-Tech Forestry Co., Ltd. Company, Dehua Rabbit Baby Decoration New Material Co., Ltd., Zhejiang Shiyou Wood Co., Ltd., Jiusheng Flooring Co., Ltd., Jingjiang Guolin Wood Co., Ltd. Limited company, Fujian Zhangping Mucun Forest Products Co., Ltd., Zhejiang Haiyue Green Construction Technology Co., Ltd., Dacheng County Red Sandalwood Jiayuan Classical Furniture Co., Ltd. Company, Guangzhou Yingeran Fireproof Material Co., Ltd., China Wood Protection Industry Association. The main drafters of this document. Liu Nengwen, Yao Yuping, Cao Changkun, Dang Wenjie, Mao An, Liu Yuanqiang, Zhang Minglong, Cui Tongke, Wu Zheyan, Dou Qingqing, Sun Longxiang, Yu Xiaoxi, Liu Xingcai, Li Guangjin, Xiao Tenghong, Yan Jingqi, Li Huiming. Anticorrosive plywood

1 Scope

This document specifies the terms and definitions, requirements, sample sampling and size requirements of anti-corrosion plywood, test methods, inspection rules, markings, packaging Loading, transportation and storage. This document is applicable to anti-corrosion plywood produced from veneers treated with compression method as raw material.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 9846-2015 ordinary plywood GB/T 14019 Terminology for Wood Preservation GB/T 17657-2013 Test method for physical and chemical properties of wood-based panels and facing wood-based panels GB/T 18259 Artificial board and its surface decoration terminology GB 18580-2017 The limit of formaldehyde emission in wood-based panels and products of interior decoration materials GB/T 23229 Water-borne wood preservative analysis method GB/T 27651-2011 Classification and requirements for the use of anticorrosive wood LY/T 2374-2014 Test method for penetration of effective agents in anticorrosive wood and flame retardant wood SB/T 10404-2006 Determination of main components of water-borne preservatives and flame retardants AWPAA30-18 High Performance Liquid Chromatography Analysis of 4,5-Dichloro-2-n-octylisothiazolin-3-one (DCOI) in wood and solution Standard Method(Standard MethodfortheDeterminationof4,5Dichloro-2-N-Octyl-4-Isothiazolin-3-One (DCOI)inWoodandSolutionsbyHighPerformanceLiquidChromatography(HPLC)) AWPAA34-14 High Performance Liquid Chromatography Analysis of Bis-(N-Cyclohexyl) Diazene Dioxide (HDO) in HDO-treated Wood The standard method (StandardMethodfortheAnalysisofN-Cyclohexyldiazeniumdioxide(HDO)inWood TreatedwithHDOContainingSolutionsbyHPLC) AWPAA36-20 Use Sodium Lauryl Sulfate and Hamming 1622 to Determine the Standards of Quaternary Ammonium Compounds in Preserved Wood by Potentiometric Back Titration Method Standard(StandardforDeterminationofQuaternaryAmmonium Compoundsin WoodbyPotentiometric Back-TitrationUsingSodiumLaurylSulfateandHyamine1622) AWPAA37-17 Standard for the determination of quaternary amine compounds in antiseptic wood and antiseptic treatment solutions by potentiometric titration with sodium tetraphenylborate (StandardforDeterminationofQuaternaryAmmonium Compoundsin Woodand WoodTreating SolutionsbyPotentiometricTitrationUsingSodiumTetraphenylborate) AWPAA43-20 Standard Method for Analysis of Imidacloprid in Wood and Water-based Preparations ImidaclopridinWoodandWaterborneFormulations)

3 Terms and definitions

The following terms and definitions defined in GB/T 9846-2015, GB/T 18259, and GB/T 14019 apply to this document. For convenience For use, the following repeatedly lists some terms and definitions in GB/T 14019. 3.1 It is produced with veneer treated with compression method and other methods as raw materials, which can prevent decay, insect pests (including termites) or marine borehole animal hazards. Harmful plywood. 3.2 Drug loading retention The minimum amount of preservative required to be retained in the analysis area of the preservative plywood inspection sample. Usually refers to the active ingredients of preservatives, in thousands Gram per cubic meter (kg/m3) said. [Source. GB/T 14019-2009, 3.4.71, with modification] 3.3 Penetration The degree to which the preservative (active ingredient) penetrates into the sapwood of the preservative plywood veneer. Note. Penetration is expressed in percentage (%).

4 Use classification

The classification of anti-corrosion plywood shall be carried out in accordance with the provisions of Chapter 4 C1, C2, C3.1, C3.2, C4.1, and C4.2 in GB/T 27651-2011.

5 requirements

5.1 Specifications and deviations Should meet the requirements of 5.1 in GB/T 9846-2015. 5.2 Appearance quality The surface of the anticorrosive plywood should be clean, free of foreign matter adhering, no visible preservative deposits, no shortage of surface boards, no bubbling, and no delamination. 5.3 Moisture content The moisture content should be 5%~14%. 5.4 Bonding strength The gluing strength should comply with the regulations in 5.3.2 of GB/T 9846-2015 for Type Ⅰ and Type Ⅱ plywood. 5.5 Dipping and peeling It shall meet the requirements of 5.3.3 in GB/T 9846-2015. 5.6 Bending strength and elastic modulus It shall meet the requirements of 5.3.4 in GB/T 9846-2015. 5.7 Formaldehyde emission When used indoors, the amount of formaldehyde released should meet the relevant regulations of GB 18580-2017. 5.8 Drug loading and penetration 5.8.1 The drug load should meet the requirements of Table 1. 7.5 Dipping and peeling According to the provisions of 4.19 in GB/T 17657-2013. 7.6 Static bending strength and elastic modulus According to the provisions of GB/T 17657-2013, 4.7. 7.7 Formaldehyde emission According to the relevant regulations of GB 18580-2017. 7.8 Drug loading and penetration 7.8.1 When determining the content of each active ingredient of the preservatives listed in Table 1, copper, copper oxide, DDAC, BAC, tebuconazole, propiconazole and boron The relevant regulations of GB/T 23229 shall be carried out; chromium trioxide and arsenic pentoxide shall be carried out according to the provisions of Chapter 8 and Chapter 9 in SB/T 10404-2006. OK; HDO is carried out according to the relevant regulations of AWPAA34-14; DCOI is carried out according to the relevant regulations of AWPA A30-18; Imidacloprid is carried out according to the relevant regulations of AWPA A30-18 The relevant regulations of AWPAA43-20 shall be carried out; DPAB shall be carried out according to the relevant regulations of AWPAA36-20 and AWPAA37-17. 7.8.2 Penetration shall be carried out in accordance with the regulations of LY/T 2374-2014.

8 Inspection rules

8.1 Inspection classification Product inspection is divided into factory inspection and type inspection. 8.2 Factory inspection Ex-factory inspection includes inspection of specifications, dimensions and deviations, appearance quality, moisture content, bonding strength, and penetration. 8.3 Type inspection 8.3.1 In addition to all the items of the factory inspection, the type inspection should be increased by immersion peeling, static bending strength and elastic modulus, drug loading, formaldehyde Release inspection. 8.3.2 Periodic inspections during normal production throughout the year are generally not less than twice. Type inspection should be carried out in one of the following situations. a) When the product is finalized and appraised; b) When there are major changes in the production process and the types of raw and auxiliary materials; c) When production has been suspended for more than three months and production is resumed; d) When a major quality problem is found in the factory inspection; e) When required by the quality supervision department. 8.4 Sampling and determination rules Specifications and deviations, appearance quality, moisture content, bonding strength, immersion peeling, static flexural strength and elastic modulus, and formaldehyde emission The sampling and determination rules shall be carried out in accordance with the provisions of 7.2 and 7.3 of GB/T 9846-2015. The sampling of drug loading and penetration shall be conducted in accordance with the provisions of 7.2.3 of GB/T 9846-2015.The drug loading and penetration rate are judged according to 5.8 The relevant provisions of the 8.5 Comprehensive judgment The specifications and deviations of the same batch of sampled products, appearance quality, moisture content, bonding strength, immersion peeling, static bending strength and elastic modulus, When the formaldehyde emission, drug loading and penetration test results meet the requirements of this document, the product is judged to be qualified, otherwise it is judged to be unqualified. 8.6 Product measurement According to the provisions of GB/T 9846-2015, 7.5. 9 Identification, packaging, storage and transportation 9.1 Identification The identification of the product should include the product name, preservative type, use classification, manufacturer name or trademark, etc., and should also include Formaldehyde emission. 9.2 Packaging Products should be properly packaged according to different tree species, specifications and usage classifications. Each package should be accompanied by the product name, veneer tree species and thickness The inspection label of the degree, the type of preservative, the classification of use, the name of the manufacturer, the trademark, the size of the format, the quantity, and the product standard number. Should include the amount of formaldehyde released. 9.3 Storage and transportation Products should be laid flat during storage and transportation to prevent contamination and mechanical damage.

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