GB/T 3682-2000 (GB/T 3682.1-2018 Newer Version) PDF English
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Plastics -- Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics -- Part 1: Standard method
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Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics
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Test method for melt flow rate of thermoplastics
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GB/T 3682-2000: PDF in English (GBT 3682-2000) GB/T 3682-2000
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.080.20
G 31
idt ISO 1133.1997
Determination of the melt mass-flow rate (MFR) and
the melt volume-flow rate (MVR) of thermoplastics
ISSUED ON. OCTOBER 27, 2000
IMPLEMENTED ON. MAY 01, 2001
Issued by. State Bureau of Quality Technical Supervision
Table of Contents
Foreword ... 3
ISO Foreword ... 5
1 Scope ... 6
2 Normative references ... 6
3 Apparatus ... 6
4 Test sample ... 10
5 Temperature calibration, cleaning and maintenance of the apparatus
... 10
6 Procedure A ... 11
7 Procedure B ... 13
8 Flow rate ratio (FRR) ... 15
9 Precision ... 16
10 Test report ... 16
Annex A (Normative) Test conditions for melt flow rate determination .. 18
Annex B (Informative) Conditions in use for the designation of standards
for thermoplastic materials ... 19
Foreword
This Standard is identical to International Standard ISO 1133.1997 Plastics -
Determination of the Melt Mass-flow Rate (MFR) and the Melt Volume-flow Rate (MVR) of
Thermoplastics. This Standard is identical to ISO 1133.1997 in technical aspects, and has
the following differences in edition.
- The normative references of this Standard is less than that specified in ISO
1133.1997; however, the contents not listed in this Standard do not affect the
implementation of this standard;
- There have some editorial changes according to relevant regulations of China.
The previous edition of this Standard is national standard GB/T 3682-1983 Determination
of the Melt Flow Rate of Thermoplastics. Compared with the previous edition, there exist
main changes as follows.
- The name of the Standard is changed;
- “Normative references” are added;
- The test conditions are made to be “informative annex”; and additions and deletions
are made;
- The automatic testing of the melt mass-flow rate of and the determination of the melt
volume-flow rate of thermoplastics are added.
This Standard replaces GB/T 3682-1983 from the implementation date of this Standard.
Annex A of this Standard is normative; annex B is informative.
This Standard was proposed by the National Petroleum and Chemical Industry Bureau of
the People’s Republic of China.
This Standard shall be under the jurisdiction of the Sub-committee on Plastic Resin
Products of the National Technical Committee 15 on Plastic of Standardization
Administration of China (TC 15/SC 4).
Responsible drafting organizations of this Standard. Shanghai Entry-Exit Inspection and
Quarantine Bureau, Shanghai Research Institute of Plastics.
Participating drafting organizations of this standard. Chenguang Chemical Institute,
Yanshan Resin Application Institute, Beijing, Sinopec Shanghai Petrochemical Co., Ltd.
Plastics Factory, Jilin University Science Education Instrument Factory, and Chengde
Tester Co., Ltd.
Main drafters of this Standard. Li Jianghai, Shen Hong, Shu Xingtao, Luo Taiwei, Jiang
Haining, Tai Yuxing, and Zhao Lingyun.
This Standard was issued in 1983 for first-time.
Determination of the melt mass-flow rate (MFR) and
the melt volume-flow rate (MVR) of thermoplastics
1 Scope
1.1 This Standard specifies a method for the determination of the melt mass-flow rate
(MFR) and the melt volume-flow rate (MVR) of thermoplastic materials under specified
conditions of temperature and load. Normally, the test conditions for measurement of melt
flow rate are specified in the material standard with a reference to this Standard. The test
conditions normally used for thermoplastics are listed in annexes A and B. The melt
volume-flow rate will normally be found useful when comparing filled and unfilled
thermoplastics. The melt flow rate can now be determined by automatic measurement
provided the melt density at the test temperature is known.
This method is not applicable to thermoplastics for which the rheological behaviour is
affected by phenomena such as hydrolysis, condensation or crosslinking.
1.2 The melt mass-flow rate and melt volume-flow rate of thermoplastics are dependent
on the rate of shear. The rates of shear in this test are much smaller than those used
under normal conditions of fabrication, and therefore data obtained by this method for
various thermoplastics may not always correlate with their behaviour in actual use. Both
methods are useful in quality control.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this Standard. At the time of publication, the editions indicated were valid. All
standards are subject to revision, and parties to agreements based on this Standard are
encouraged to investigate the possibility of applying the most recent editions of the
standards indicated below.
GB/T 1031-1995 Surface roughness parameters and their values (neq ISO 468.1982)
3 Apparatus
3.1 Basic apparatus
3.1.1 The apparatus is basically an extrusion plastometer operating at a fixed
temperature. The general design is as shown in figure 1. The thermoplastic material,
which is contained in a vertical cylinder, is extruded through a die by a loaded piston. The
Annex B
(Informative)
Conditions in use for the designation of standards for thermoplastic materials
Table B.1 indicates test conditions that are currently specified in relevant standards. Other
test conditions not listed here may be used, if necessary, for a particular material.
Table B.1
Materials Conditions (code letter) Test temperature, θ, °C
Nominal load (combined),
mnom, kg
PS H 200 5.00
PE
PE
PE
PE
2.16
0.325
21.60
5.00
PP M 230 2.16
ABS U 220 10.00
PS-1 H 200 5.00
E/VAC
E/VAC
E/VAC
2.16
2.16
0.325
SAN U 220 10.00
ASA, ACS, AES U 220 10.00
PC W 300 1.20
PMMA N 230 3.80
PB
PB
2.16
10.00
POM D 190 2.16
MABS U 220 10.00
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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