As we all know, TPE material is a kind of SBS, SBS elastomer as the base material, adding operating oil (white oil, paraffin oil, etc., especially white oil is more common), reinforcing resin (such as PP, PS.).PPO, etc.), compatibilizers, functional additives (such as flame retardants, antistatic agents, anti-ultraviolet agents, etc.) and solubilizers (such as calcium powder) are elastomer materials blended and granulated. Then many friends found that the products processed with TPE materials were sticky and even a little sticky when touched by hand. So do you know what makes TPE products sticky? Here's what you know:
Analysis of the causes of stickiness of TPE products:
1. The amount of operating oil added.
The addition of operating oil is one of the indispensable and important components, and the addition of operating oil can improve the plasticity of TPE materials. However, the addition of operating oil may cause the surface of the product made of TPE material to become sticky. The main hardness range of TPE material is 0 100 degrees (shorea, the same below), in general, the softer the material, the more amount of operating oil added. However, the more oil you use, the softer the material will be, and the surface of the TPE material will be more likely to become sticky.
2. The influence of the substrate.
The substrate used in TPE is usually SEBS or SBS. SEBS is a hydrogenation product of SBS, and the oil absorption performance of SBS is superior to that of SBS (the ethylene-butene phase of SBS is easier to absorb oil and has a higher oil absorption rate than the butadiene phase of SBS). That is, the same mass of SEBS, SBS, SEBS can dissolve more mass fraction of the operating oil. In other words, the TPE of SEBS substrate is less prone to stickiness than the TPR of SBS substrate (the TPE industry habitually calls the material modified with SEBS substrate TPR, and the material modified with SBS substrate is called TPR). The hardness of TPR particles of SBS substrate is below 50 to 60 degrees, which is easy to agglomerate in the summer when the temperature is high, and the products made of TPR particles are also more sticky. However, the TPE products with SEBS substrate rarely appear sticky, except for ultra-soft materials with a hardness of less than 15 degrees.
Treatment measures for stickiness of TPE products:
1. Add an appropriate amount of operating oil.
2. For the stickiness of TPE products, it is recommended that users choose TPE materials with SEBS substrate.
To sum up, it is the cause of stickiness of TPE products and the treatment measures. If the stickiness of TPE products cannot be solved by the above methods, you can directly contact the TPE material supplier, so that you can solve the stickiness of TPE products faster.