HG/T 2628-1994 Polymethyl methacrylate (PMMA) molding material nomenclature HG/T2628-1994 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T 2628-94
Polymethyl methacrylate (PMMA)
Nomenclature of molding materials
1994-04-13. Issued
Ministry of Chemical Industry of the People's Republic of China
Implementation on 1995-01-01
Chemical Industry Standard of the People's Republic of China
Polymethyl methacrylate (PMMA)
Nomenclature of molding materials
HG/T 2628 --94
This standard adopts the international standard ISO8275/1-87 "Plastics-Methyl methacrylate (PMMA) thermoplastic molding and extrusion materials, Part 1: Nomenclature", 1 Subject content and scope of application
This standard specifies the naming method of polymethyl methacrylate (PMMA) molding materials: This naming method is based on the main purpose or processing method, important properties, additives or coloring, Vicat softening temperature and melt flow rate of PMMA molding materials.
This standard is applicable to methyl methacrylate homopolymers and methyl methacrylate copolymers. The mass content of methyl methacrylate in the copolymer is at least 80%, and the content of acrylate or other monomers does not exceed 20%. 2 Reference standards
GB/T1633 Test method for softening point (Vicat) of thermoplastics GB/T1844 Abbreviation code for plastics and resins
GB/T3682 Test method for melt flow rate of thermoplastics 3 Naming method
PMMA molding material naming method consists of abbreviation code and model. 3.1 Abbreviation code
The abbreviation code of polymethyl methacrylate is based on GB /T1844 stipulates that the English letters PMMA are used to indicate 3.2 Models
PMMA molding material models include the following: Main purpose or processing method
Important properties, additives or coloring
Vicat softening temperature
Melt flow rate
3.2.1 The main purpose or processing method of PMMA molding materials is indicated by English letters, see Table 1. Approved by the Ministry of Chemical Industry of the People's Republic of China on April 13, 1994 and implemented on January 1, 1995
HG/T 2628 —94
Main purpose or processing method
Video disc products
Extruded materials, profiles and sheets
Extruded films and sheets
General grade
Monofilament extrusion
Main purpose or processing method
Powder coating Sintering
Watch and instrument surface
3.2.2 Important properties, additives or coloring of PMMA molding materials, expressed in English letters, see Table 2. Table 2
Important properties, additives or coloring
Processing stability
Expandable range
Special flammability| |tt||Heat aging stability
Important, such as agents or coloring
Light or weather aging stability
Natural color (uncolored)
Release agent
Lubricant
Antistatic
3.2.3The Vicat softening temperature and melt flow rate of PMMA molding materials are represented by three Arabic numerals respectively. The codes and grade ranges are shown in Table 3.
Vicat softening temperature,
>88~96
>96~104
>104~112
Melt flow rate range,/10 min
4 Naming example
HG/T 2628-94
4.1 PMMA molding material for injection molding (M), latent color (C), Vicat softening temperature of 103℃ (100), melt flow rate of 1.45g/10in (015), named PMMAMC-100-015.4.2 PMMA molding material for general grade (G), natural color (N), Vicat softening temperature of 109℃ (108), melt flow rate of 2.87g/10mi (030), named PMMAGN-108-030.5 Test method
Determination of Vicat softening temperature
The method specified in GB/T 1633 is used for determination. The test load is 9.800 10.0N and the heating rate is 5±0.5℃/6 min, 5.2 Determination of melt flow rate
The method specified in GB/T3682 is used for determination. The standard test conditions are specified in No. 13 in Table 1 of 5.2 and 5.1, that is, the test load is 37.24N and the test temperature is 230C. Before the test, the sample needs to be dried at 95±5C for 5h. Additional instructions:
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Plastic Resin Products Branch (SC4) of the National Plastic Standardization Technical Committee. This standard is drafted by Shanghai Pen Chemical Factory and Chengdu Silicone Research Center of the Ministry of Chemical Industry. The main drafters of this standard are Hu Fengzhen, Lu Qingyun, Xu Xiangda, Zheng Daode, and Gu Qizhong. The People's Republic of China
Chemical Industry Standard
Polymethyl methacrylate (PMMA)
Nomenclature of molding materials
HG /T 2628 — 94
Editor: Chemical Industry Standards Editorial Department
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal Code: 100013bZxz.net
Printer: Standardization Research Institute of the Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Copyright 880×[2301/16
Number of words on a sheet: 6000
First edition in November 1994
First printing in November 1994
Number of copies: 1-500
Cost: RMB 2.50
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