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GB/T 39977-2021 English PDF

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GB/T 39977-2021: General technical requirements for aquarium poly(methyl methacrylate) sheets
Status: Valid
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Basic data

Standard ID GB/T 39977-2021 (GB/T39977-2021)
Description (Translated English) General technical requirements for aquarium poly(methyl methacrylate) sheets
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G32
Word Count Estimation 10,145
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 39977-2021: General technical requirements for aquarium poly(methyl methacrylate) sheets

---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.
General technical requirements for aquarium poly(methyl methacrylate) sheets ICS 83.140.10 G32 National Standards of People's Republic of China Polymethyl methacrylate sheet for aquarium General technical requirements Released on 2021-05-21 2021-12-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the Engineering Plastics Subcommittee of the National Plastics Standardization Technical Committee (SAC/TC15/SC9). Drafting organizations of this standard. Jiangsu Tomson New Material Technology Co., Ltd., Zhonglan Chenguang Chemical Research and Design Institute Co., Ltd., Taixing Tomson Asia Co., Ltd., Jiangsu Guangcheng Acrylic Co., Ltd., Guangzhou Synthetic Materials Research Institute Co., Ltd., Jinxi Chemical Research Institute Co., Ltd., China National Building Material Inspection and Certification Group Co., Ltd. The main drafters of this standard. Tang Jiachen, Liu Lirong, Tang Yuesheng, Hu Daoguang, Qi Luowen, Xiao Jianxia, Tang Hongqiang, Zhang Yun, Wang Baojun, Li Guiqiang, Yang Yifan and Yang Juhua. Polymethyl methacrylate sheet for aquarium General technical requirements

1 Scope

This standard specifies the requirements, test methods, inspection rules, markings, packaging, transportation and Store. This standard applies to aquariums that are spliced by bulk polymerization (including single-layer polymerization and multi-layer polymerization) using methyl methacrylate as raw material. The polymethyl methacrylate board used in the museum, hereinafter referred to as "plate".

2 Normative references

The following documents are indispensable for the application of this document. For all dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 1033.1 Determination of the density of plastic non-foam plastics Part 1.Immersion method, liquid pycnometer method and titration method GB/T 1034 Determination of Water Absorption of Plastics GB/T 1036 Determination of the coefficient of linear expansion of plastics at -30℃~30℃ Quartz dilatometer method GB/T 1040.1 Determination of tensile properties of plastics Part 1.General GB/T 1040.2 Determination of tensile properties of plastics Part 2.Test conditions for molding and extrusion plastics GB/T 1043.1 Determination of impact performance of plastic simply supported beams Part 1.Non-instrumented impact test GB/T 1633 Thermoplastics Determination of Vicat Softening Temperature (VST) GB/T 2410 Determination of light transmittance and haze of transparent plastics GB/T 2918 Standard environment for condition adjustment and testing of plastic samples GB/T 3398.2 Determination of Plastic Hardness Part 2.Rockwell Hardness GB/T 9341 Determination of bending properties of plastics GB/T 16422.2 Plastic laboratory light source exposure test method Part 2.Xenon arc lamp HG/T 3862 Plastic Yellow Index Test Method

3 requirements

3.1 Appearance 3.1.1 Surface The surface of the product should be smooth and clean, and the outer surface of the plate should have no scratches or spots larger than 5mm2, and no obvious processing marks; the splicing line should be smooth and free Obviously bumpy phenomenon. 3.1.2 Internal 3.1.2.1 There should be no air bubbles, impurities larger than 3mm2, or other materials that may adversely affect the expected application performance of the board. defect. 3.1.2.2 The number of defects of the plate less than 3mm2 within 1m2 shall be negotiated between the supplier and the buyer. When there is 1mm2~3mm2 inside the plate

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