What is the ratio of TPE formula?

TPE, also known as thermoplastic elastomer, is a polymer material that has the characteristics of both plastic and rubber. It shows the high elasticity of rubber at room temperature and can be plasticized and formed at high temperature (no vulcanization is required). It has many advantages such as excellent colorability, wide hardness range, weather resistance, soft touch, fatigue resistance, and temperature resistance. However, in order to obtain TPE products with excellent performance, reasonable formula design is crucial. So what is the ratio of TPE formula? The following Shenzhen Zhongsu Xiaobian will introduce this issue to you.

TPE (thermoplastic elastomer) materials have been widely used in many fields due to their unique elasticity and processing convenience. However, in order to obtain TPE products with excellent performance, reasonable formula design is crucial. The ratio of each component in the formula directly affects the key indicators of TPE materials such as hardness, elasticity, wear resistance, and processing performance. So, how should the ratio of each component in the TPE formula be determined?

The formula ratio of TPE (thermoplastic elastomer) varies depending on factors such as the specific type of material, application requirements, and performance requirements, so it is difficult to give a unified standard ratio. However, based on public information, some common TPE formula ratio ranges can be summarized for your reference:

1. Basic formula ratio

For some TPE materials, such as TPE based on SEBS (styrene-ethylene/butylene-styrene block copolymer) and SBS (styrene-butadiene-styrene block copolymer), the basic formula ratio may include:

SEBS or SBS: As the main polymer matrix, its content usually accounts for a large proportion in the formula. The specific ratio may vary depending on the material hardness, elasticity and other performance requirements, generally between 10 and 30 parts (by weight, the same below).

Plasticizer (such as white oil): used to improve the processing performance and softness of the material, and its content is usually between 20 and 40 parts.

Filler (such as calcium carbonate, talcum powder, etc.): used to reduce costs, improve the hardness and wear resistance of the material, etc., and its content may be between 1 and 10 parts, depending on the application requirements. Other additives (such as antioxidants, UV stabilizers, lubricants, etc.): used to improve the weather resistance and processing performance of the material, and their content is usually less, generally between 0.1 and 1 parts.

II. Special application formula ratio

For some special applications, such as high wear-resistant TPE materials, the formula ratio may be different. For example, it is pointed out that high wear-resistant TPE materials may contain the following ingredients and their proportion ranges:

SEBS or SBS: 15~30 parts

TPU (thermoplastic polyurethane): 15~30 parts (used to enhance the wear resistance of the material)

White oil: 20~40 parts

PP (polypropylene): 1~10 parts

Silicone masterbatch: 1~10 parts (may be used to improve the processing performance or surface performance of the material)

III. Precautions

Adjustability of formula ratio: The formula ratio of TPE materials is not fixed, but can be flexibly adjusted according to specific application needs and performance requirements. For example, by increasing the content of plasticizer, the softness and processing performance of the material can be improved; by increasing the content of filler, the cost of the material can be reduced and the hardness can be increased.

Confidentiality of the formula: The formula of many TPE materials is a trade secret, so it is difficult to obtain the specific formula ratio. In practical applications, it is recommended to refer to the technical data provided by the material supplier or consult professional technicians.

The impact of formula ratio on performance: Different formula ratios will have a significant impact on the performance of TPE materials. Therefore, when adjusting the formula ratio, it is necessary to fully consider the requirements of the material's hardness, elasticity, wear resistance, temperature resistance, processing performance, etc.

In general, the formula ratio of TPE materials is a complex and changeable issue, which needs to be flexibly adjusted according to specific application needs and performance requirements. In practical applications, it is recommended to refer to the technical data provided by the material supplier or consult professional technicians.