Page 81 - 《橡塑技术与装备》英文版2026年3期

PROCESS AND EQUIPMENTS

Optimization of tensile strength and extrudability of silicone rubber
using orthogonal experimental method

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Luo Weiying , Chen Bingyao 1,2,3 , Cao Zhiyun , Chen Liang , He Xiaojun , Liu Yubin 1
(1. Guangdong Sanhe Holding Co. LTD., Zhongshan 528429, Guangdong, China;
2. Sanhe Fine Chemical (Guangdong) Technology Co. LTD., Zhongshan 528441, Guangdong, China;
3. Guangdong Shunde Sanhe Chemical Technology Co. LTD., Foshan 528325, Guangdong, China)
Abstract: This paper uses the orthogonal experimental method to study the effects of three factors (107
glue, nano-calcium carbonate, silicone oil) on tensile strength and extrudability. Experimental results show the
optimal formulation: 40% 107 glue, 60% nano-calcium carbonate, and 3% silicone oil. Under this formulation,
tensile strength reaches 2.63 MPa and extrudability 68.2 mL/min. Analysis shows that silicone oil content has
the greatest impact on tensile strength (40.16%), while 107 glue content has the largest effect on extrudability
(64.29%). These results provide valuable guidance for silicone rubber industrial production.
Key words: orthogonal experiment; silicone rubber; tensile strength; extrudability
Classification number: TQ330.7 Article number: 1009-797X(2026)03-0035-04
Document code: B DOI:10.13520/j.cnki.rpte.2026.03.007

Orthogonal experimentation is a kind of efficient method toxicity, and physiological inertness. These include buttons
based on orthogonal arrays for scientifically arranging multi- and seals in the electronics and electrical industry, gaskets
factor and multi-level experiments. Its core advantage lies in and hoses in the automotive sector, catheters and implants in
its ability to replace the vast and complex testing workload the medical field, food processing utensils, building sealants,
in comprehensive experiments with a small number of aerospace sealing materials, household kitchenware, as well as
highly representative experimental combinations, thereby encapsulation and protection of new energy battery modules
efficiently revealing the primary and secondary order of and photovoltaic components.
different influencing factors as well as the optimal product The performance focus of silicone rubber varies across
formulation or process parameter combination. In the field of different fields, with tensile strength and extrudability being the
research, development, and production of silicone adhesives, core performance indicators for industrial applications. Tensile
the application of orthogonal experimentation is extremely strength is a key indicator for measuring the resistance of
extensive and profound. The formulation of silicone adhesives silicone rubber products to tensile failure, directly determining
is a typical multi-factor system, and its final performance is the durability, reliability, and service life of the products.
jointly determined by the types, dosages, and mixing process A silicone rubber seal ring or gasket with excellent tensile
parameters of various raw materials such as base polymers (e.g., strength can maintain structural integrity when subjected
107 silicone rubber), fillers (e.g., fumed silica), crosslinking to mechanical stress, thermal expansion and contraction,
agents, catalysts, plasticizers (e.g., silicone oil), and coupling or external impacts, without easily tearing or undergoing
agents. permanent deformation, thus ensuring long-term effectiveness
Silicone rubber is widely used in various applications due
to its excellent properties such as resistance to high and low Biography: Luo Weiying (2003-), female, holds a bachelor's degree
and is currently primarily engaged in research and development of silicone
temperatures, electrical insulation, weather resistance, non-
products.

Vol.52，2026 ·35·