Page 82 - 《橡塑技术与装备》英文版2026年3期

HINA R&P TECHNOLOGY AND EQUIPMENT

of its sealing effect or structural support function. Meanwhile, 1.1.2 Experimental equipment
extrudability directly affects production efficiency and the The experimental equipment models and suppliers used
appearance quality of the final product. Good extrudability in this study are as follows: Experimental Dynamic Mixer
means that the rubber compound is soft and moderate, with (QF-5L), Foshan Jinyinhe Intelligent Equipment Co., Ltd.;
smooth and uniform extrusion, without issues such as flow Electronic Universal Testing Machine (LK-103B), Dongguan
interruption, unstable extrusion, or rough surface, which Likong Instrument Technology Co., Ltd.; Electronic Analytical
enables efficient manual operation or large-scale automated Balance (PY-E62), Shenzhen Puyun Electronics Co., Ltd.;
production. This article improves the extrudability and tensile Universal Tensile Testing Machine (WDW-1), Shanghai
strength of silicone rubber by adjusting the content of 107 Songdun Machinery Equipment Co., Ltd.; Extrusion Testing
silicone rubberin the base material, the amount of nano- Machine, self-made.
calcium powder filling, and the addition of silicone oil.
Traditional single-factor experiments require extensive 2 Experimental design
testing and are challenging in balancing the relationship This experiment investigates the influence of three factors
between extrudability and tensile strength. This article on the tensile strength of silicone rubber through orthogonal
addresses the difficult problem of synergistic optimization experimental design. These factors are the dosage of 107
of tensile strength and extrudability in silicone rubber, and silicone rubber, the dosage of nano-calcium powder, and the
designs an L9(3^3) orthogonal experiment. The experiment dosage of 350 mPa·s silicone oil. Three levels are designed
3
sets 107 silicone rubber, nano-calcium powder filling amount, for each factor (Table 1), utilizing an L 9 (3 ) orthogonal
and silicone oil addition as three factors, with each factor experimental design.
having three levels, resulting in a total of nine experimental Table 1 Design of orthogonal experimental factor levels
groups. The influence of each factor on tensile strength and Level 107 silicone rubber Mixed nano-calcium Silicone oil (C)/%
(A)/%
(B)/%
extrudability is analyzed using the range analysis method. 1 30 55 3
2 35 60 5
Ultimately, an optimal formula that meets the multiple 3 40 65 7
requirements of industrial application for tensile strength and
other factors is achieved. Based on the orthogonal table, nine sets of orthogonal
experiments were designed, as shown in table 2.
1 Experimental part Table 2 Orthogonal experimental design table
1.1 Apparatus and reagents used in the Experiment 107 silicone rubber(A) Mixed nano-calcium (B) Silicone oil (C)
Number
experiment 1 1 1 1
1.1.1 Experimental reagents 2 3 1 1 2 3 2 3
The main reagents and suppliers used in this experiment 4 2 1 2
5 2 2 3
are: 20,000 mPa·s 107 silicone rubberfrom Hubei Shixing 6 2 3 1
Chemical Co., Ltd.; nano-calcium carbonate (with an average 7 3 1 3
8 3 2 1
particle size of 50~100 nm) from Guangxi Warner New 9 3 3 2
Material Co., Ltd.; methyltrimethoxysilane from Hubei New
Blue Sky New Material Co., Ltd.; vinyltrimethoxysilane from 1.3 Sample preparation
Hubei New Blue Sky New Material Co., Ltd.; KH550 from Add a certain amount of 107 glue, nano-calcium
Hangzhou Guibao New Material Co., Ltd.; dibutyltin dilaurate carbonate, and silicone oil into an experimental dynamic mixer
from Hangzhou Guibao New Material Co., Ltd.; silicone oil and stir at room temperature for 10 minutes. Then, raise the
(350 mPa·s) from Hubei Longsheng Sihai New Material Co., stirring paddle to scrape off the powder. Ensure that both the
Ltd. stirring paddle and the calcium powder on the cylinder wall
are completely scraped off. After scraping, continue stirring,

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