Page 86 - 《橡塑技术与装备》英文版2026年3期

HINA R&P TECHNOLOGY AND EQUIPMENT

Table 1 Test formula (in parts) 1.5 Performance analysis
Formula number
Component （1）Processing performance. The loss factor tanδ of the
1 # 2 # 3 # 4 #
STR20 55 55 55 55 rubber compound was tested using RPA under the following
BR9000 15 15 15 15 conditions: temperature of 100℃, frequency of 0.1 Hz, and
SBR1502 30 30 30 30
N234 60 60 60 60 strain sweep ranging from 0.7% to 1256%.
V500 12 8.4 6 2.4
Instant fluid black Gold rubber 0 3.6 6 9.6 （2）Dynamic mechanical properties. Testing was
Others 17.4 17.4 17.4 17.4 conducted using a DMA instrument under the following
conditions: frequency of 10 Hz, dynamic strain of 0.25%, and
1.3 Main equipment and instruments temperature scanning from -60~ 80 ℃.
XM270 (4~40) internal mixer, a product of Dalian （3）Dynamic cutting performance: Test the cutting
Rubber and Plastics Machinery Co., Ltd.; MFR100 automatic
quality loss rate using a rubber dynamic cutting tester.
rotorless rheometer, Shanghai Nuojia Instrumentation （4）Environmental performance: Testing H-bay protons
Co., Ltd.; MVS3L Mooney viscometer, Shanghai Nuojia using a nuclear magnetic resonance (NMR) instrument.
Instrumentation Co., Ltd.; GT-AI-7000S electronic universal
（5）Low-temperature performance: Test the Shore
testing machine, Gaotie Testing Instrument Co., Ltd.; GT- A hardness after different parking durations using a low-
7012-D DIN abrasion tester, Gaotie Testing Instrument Co., temperature chamber.
Ltd.; GT-7012-Q rubber dynamic cutting tester, Gaotie Testing
（6）Other performance indicators are tested in
Instrument Co., Ltd.; RPA2025 rubber processing analyzer, accordance with corresponding national standards or enterprise
a product of Shanghai Zimeng Intelligent Robot Co., Ltd.; standards.
VR-7130 dynamic mechanical analysis (DMA) instrument, a
product of UESHIMA, Japan. 2 Results and Discussion
1.4 Sample preparation 2.1 Vulcanization characteristics
The rubber compound is processed using a 3-stage
The vulcanization characteristics of the rubber compound
mixing process, all conducted in an XM270 internal mixer. are shown in table 2.
The first-stage mixing process is as follows: add various
Table 2 Vulcanization characteristics of rubber
raw rubbers, other masterbatch additives, and carbon black compound
→ press the rammer for 30 seconds at a speed of 55r/min → Project # Formula Number #
#
#
1
2
4
raise the rammer in place, clean, and maintain a temperature Mooney viscosity [M L (1+4) at 100℃] 61 61 3 61 62
of 115℃ → add oil → press the rammer for 25 seconds → Mooney scorch time t 5 (125℃)/min 34.13 34 33.9 33.78
Cure meter data (160℃)
raise the rammer in place, clean → press the rammer until the M L /(dN·m) 1.98 1.97 1.99 2.1
temperature reaches 160℃ to discharge the rubber; M H /(dN·m) 13.54 13.61 13.8 14.22
T C10/ min 2.86 2.78 2.7 2.61
The second-stage mixing process is as follows: add a T C30 /min 4.04 4 3.95 3.85
T C90 /min 8.04 8.02 7.96 7.90
portion of masterbatch → press the rammer for 40 seconds at T R97 /min - - - -
a speed of 45 r/min → lift the rammer in place and clean →
press the rammer for 30 seconds at a speed of 30 r/min → lift As can be seen from table 2, after substituting instant
the rammer in place and clean → press the rammer until the black gold rubber for different proportions of environmentally
temperature reaches 160℃ to discharge the rubber. friendly aromatic oil, there is almost no effect on Mooney
The three-stage mixing process is as follows: add the viscosity and scorch time, and the vulcanization rate remains
second-stage masterbatch and final rubber compound small at the same level. As the substitution ratio increases, the
materials → press the rammer for 40 seconds at a speed of 25 rheometer's maximum torque (MH) increases, which is related
r/min → lift the rammer in place and clean → press the rammer to the rubber hydrocarbon component contained in the instant
until the temperature reaches 100℃ to discharge the rubber. fluid black gold rubber material. During the vulcanization

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