What factors determine the tensile strength and tear strength of rubber sponge (semi-finished product)?
Publish Time: 2024-10-23
The tensile strength and tear strength of rubber sponge (semi-finished product) are important indicators to measure its performance and are affected by many factors.
First, the selection of raw materials plays a key role. The type and quality of rubber have a direct impact on tensile strength and tear strength. Different rubbers have different molecular structures and physical properties. Some high-performance rubbers perform better in the strength and degree of cross-linking of molecular chains, which can give rubber sponge (semi-finished product) higher tensile strength and tear strength. At the same time, additives such as reinforcing agents and fillers will also affect these two strength indicators. For example, reinforcing agents such as carbon black can increase the cross-linking density of rubber and improve the rigidity and strength of the material.
Secondly, the foaming process has an important influence on strength. The control of the foaming ratio is directly related to the internal structure of the rubber sponge. If the foaming ratio is too high, the pores inside the material will increase and become larger, which will make the material loose, thereby reducing the tensile strength and tear strength. On the contrary, the appropriate foaming ratio can maintain good strength performance while ensuring a certain elasticity. In addition, parameters such as temperature and pressure during the foaming process will also affect the cross-linking degree and pore structure of the material, and thus affect the strength.
Furthermore, the vulcanization process is an important link in determining the strength of Rubber sponge (semi-finished product). The degree of vulcanization will change the cross-linking structure of rubber molecules. Moderate vulcanization can make rubber molecules form a stable three-dimensional network structure, improving the tensile strength and tear strength of the material. Insufficient or excessive vulcanization may lead to a decrease in strength.
Finally, the mixing uniformity and molding process in the production process will also affect the strength. Uneven mixing will lead to inconsistent internal performance of the material and reduce strength. A good molding process can ensure the structural integrity of the material and improve strength performance.
In short, the tensile strength and tear strength of Rubber sponge (semi-finished product) are determined by many factors such as raw materials, foaming process, vulcanization process and production process. During the production process, it is necessary to rationally select raw materials and optimize process parameters to obtain rubber sponge (semi-finished product) with good strength properties.
