GB/T 45336-2025 PDF EnglishUS$380.00 · In stock · Download in 9 seconds
GB/T 45336-2025: Plastics - Determination of drawing characteristics of thermoplastics in the molten state 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 45336-2025: Plastics - Determination of drawing characteristics of thermoplastics in the molten state---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/GBT45336-2025 GB NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA ICS 83.080.20 CCS G 31 Plastics - Determination of drawing characteristics of thermoplastics in the molten state (ISO 16790.2021, MOD) Issued on: FEBRUARY 28, 2025 Implemented on: SEPTEMBER 1, 2025 Issued by. State Administration for Market Regulation; Standardization Administration of PRC. Table of ContentsForeword... 3 Introduction... 5 1 Scope... 6 2 Normative references... 6 3 Terms and definitions... 6 4 Principle... 8 5 Equipment... 9 6 Calibration... 13 7 Sample and conditioning... 14 8 Test procedure... 14 9 Results representation... 23 10 Precision... 25 11 Test report... 25 Appendix A (Informative) Comparison list of structure numbers between this document and ISO 16790.2021... 27 References... 30ForewordThis document was drafted in accordance with the provisions of GB/T 1.1-2020 Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents. This document is modified in relation to ISO 16790.2021 Plastics - Determination of drawing characteristics of thermoplastics in the molten state. Compared with ISO 16790.2021, this document has many structural adjustments. See Appendix A for a comparison list of the structural number changes between the two documents. The technical differences between this document and ISO 16790.2021 and their reasons are as follows. -- ISO 11443 (see 5.1.2, 5.1.3.3, and 6.1) is replaced by the normative reference GB/T 25278 to adapt to Chinese technical conditions and increase operability; -- ISO 291 is replaced by the normative reference GB/T 2918 (see Chapter 7) to adapt to Chinese technical conditions and increase operability; -- The "Measurement of mean velocity" has been optimized and supplemented to adapt to Chinese technical conditions and increase operability (see 8.5.1); -- It is divided into two parts. extruder (8.5.1.1) and capillary rheometer (8.5.1.2) to make the calculation methods of the two extrusion methods clearer; -- "Weigh the amount of the specimen extruded from the die within 1 minute as the mass flow Q, with an accuracy better than ±1 g" is changed to "Weigh the amount of the specimen extruded from the die within 1 minute as the mass flow Q, with an accuracy better than ±0.01 g" (see 8.5.1.1) to adapt to Chinese technical conditions and improve accuracy; -- The content "ρT shall be calculated according to GB/T 3682.1 or other appropriate methods" is added (see 8.5.1.1) to provide the calculation method; -- The calculation formula for the mean velocity of the capillary rheometer is added (see 8.5.1.2) to provide the calculation method; -- The normative references to GB/T 3682.1 are added (see 8.5.1.1 and 8.5.1.2) to adapt to Chinese technical conditions and increase operability; -- The content "Important note -- Melt strength shall not be reported alone. Test results shall always be reported together with the actual test conditions" is deleted from Chapter 11. The following editorial changes were made to this document. -- A foreword is added, the content of which corresponds to part of the scope of ISO 16790.2021; -- Note 2 and Note 3 of "initial diameter" in the definitions are transferred to Note 1 and Note 2 of 8.4.2.1 (see 8.4.2.1) for application in the test procedure. 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 the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Technical Committee on Plastics of Standardization Administration of China (SAC/TC15). Drafting organizations of this document. Beijing Sinopec Fuel Gas Co., Ltd., Sinopec (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing Esum Technology Co., Ltd., Zhonglan Chenguang Chengdu Testing Technology Co., Ltd., Xiamen Harvest Intelligent Manufacturing Co., Ltd., NETZSCH Scientific Instruments Trading (Shanghai) Co., Ltd., Gotech Testing Machines (Dongguan) Co., Ltd., Zhejiang Shiny New Materials Co., Ltd., Hubei Xiangyuan New Material Technology Co., Ltd., Zhejiang NHU Co., Ltd., Guangdong Zhonghe High-tech Co., Ltd., Zhejiang Yonghe Refrigerant Co., Ltd., Zhejiang Expo New Materials Co., Ltd., Lanzhou Chemical Research Center of Petrochina Company Limited, China Petroleum Corporation Petrochemical Research Institute Co., Ltd., Hebei Shuanglongsheng Optoelectronic Technology Co., Ltd., Hebei Tianji New Materials Co., Ltd., Kingfa Sci.&Tech. Co., Ltd., Ningbo Yongling Avigation Technology Co., Ltd., Jiangsu New Taurus Cable Co., Ltd., Guilin International Wire and Cable Group Co., Ltd., Yangzhou Haonianhua Polymer Materials Co., Ltd., Zhejiang Sanmen Hongqiao Rubber&Plastic Technology Co., Ltd., Shenzhen Jiexinhua Technology Co., Ltd., Huizhou Yuansu Polymer Materials Co., Ltd., Changzhou Shunxiang New Material Technology Co., Ltd., Meixin Manufacturing Co., Ltd., Dongguan Mingkai Plastics Technology Co., Ltd., Ningbo Micro-foam Technology Co., Ltd. Main drafters of this document. Yang Lili, Xu Yaohui, Lu Dongmei, Zhang Yanjun, Zhong Xiangwen, Liu Ping, Wu Tao, Xu Guohong, Wei Qiong, Liang Chuyan, Li Guangzhen, Hu Yunfeng, Chen Min, Li Yanqin, Du Bin, Sun Tieguo, Sun Huimin, Pang Chenghuan, Zhang Yaoyue, Lv Mingfu, Chen Yao, Chen Xingzhou, Wu Yongshao, Li Zhangting, Lan Qiaobo, Wu Congqiao, Li Cheng, Ai Zuguo, Hu Weibo, Lin Dongrong, Niu Guiming, Bao Jinbiao. Plastics - Determination of drawing characteristics of thermoplastics in the molten state1 ScopeThis document describes a method for determining the drawing and fracture properties of thermoplastics in the molten state by measuring the melt forces developed when the melt strand is deformed under specified extrusion temperature and traction conditions. This document applies to thermoplastic molding and extrusion materials that have sufficient melt strength to be extruded using a capillary rheometer or an extruder equipped with a die or another extrusion device. This document also applies to chemically stable thermoplastics that can be formed into extrudates free of foreign bodies, bubbles, unmelted impurities, etc.2 Normative referencesThe provisions of the following documents constitute the essential clauses of this document through normative references in this text. Among them, for referenced documents with dates, only the versions corresponding to the dates are applicable to this document; for referenced documents without dates, the latest versions (including all amendments) are applicable to this document. GB/T 2918 Plastics - Standard atmospheres for conditioning and testing (GB/T 2918-2018, ISO 291.2008, MOD) GB/T 3682.1 Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics - Part 1.Standard method GB/T 25278 Plastics - Determination of the fluidity of plastics using capillary and slit-die rheometers (GB/T 25278-2010, ISO 11443.2005, MOD)3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 drawing The process of drawing a filament of polymer melt when it is continuously extruded by Record and measure the drawing force Ft and drawing velocity vt in the first stage. 8.5.2.7 Measure the drawing force at different melt drawing velocities by continuously increasing the pulling velocity. Wait at least 30 seconds at each measuring point to allow the force value to stabilize. 8.5.2.8 Continue to increase the drawing velocity until the melt breaks. The increase in the drawing velocity shall ensure that at least 6 values of the drawing force at different drawing velocities can be measured before the melt breaks. 8.5.2.9 Repeat this process at least twice. 8.5.3 Measurement of melt strength 8.5.3.1 Insert the melt strand between the drive rollers, then close the rollers to tightly clamp the melt strand, and then stretch the melt at a certain pulling velocity. Set the pulling velocity of the pulling rollers to be slightly lower than the minimum melt pulling velocity value obtained in 8.5.2.3.This velocity will vary depending on the material and temperature. The initial melt pulling velocity should be 0.0125 m/s. Insert the melt strand between the drive rollers, then close the rollers to tightly clamp the melt strand, and then stretch the melt at a velocity slightly lower than the minimum drawing velocity obtained in 8.5.2.3.The initial drawing velocity will vary depending on the material and temperature. 0.0125 m/s is recommended. NOTE. Too low a mean velocity and drawing velocity will cause the extrudate to solidify. Therefore, it is necessary to select appropriate extrusion and drawing velocities to prevent local solidification of the extrudate (forming a hard skin), which will distort the melt strength results. 8.5.3.2 Start recording the drawing force and drawing velocity. 8.5.3.3 Increase the pulling velocity until the minimum drawing velocity is reached. 8.5.3.4 After the extrudate has stabilized and a baseline signal has been recorded for these conditions, start accelerating constantly. Record the time at which acceleration is initiated. The starting value of acceleration should be 0.0006 m/s2, but this value varies with material and temperature. In the case of extrusion using a capillary rheometer, the combination of a high melt mean velocity Vm and a low melt drawing acceleration a may result in the material in the barrel being used up before the final value of the melt strength is measured. In addition, the selection of the melt drawing acceleration shall take into account both the time interval between melt strand breaks so that appropriate data can be collected and that no melt solidification occurs during the measurement (see the Note of 8.5.3.1). The ......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 45336-2025 be delivered?Answer: The full copy PDF of English version of GB/T 45336-2025 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 45336-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 45336-2025_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 45336-2025 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of GB/T 45336-2025?A step-by-step guide to download PDF of GB/T 45336-2025_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 45336-2025". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
