TPE glued toothbrush handle precipitated and spit out oil. Today, a toothbrush manufacturer called our sales staff. After the toothbrush they produced was packaged, there was a layer of oil on the surface of the wrapping paper. Toothbrush manufacturers adopt the TPE secondary injection molding and coating design. The toothbrush packaging is usually the back of the paper card and the PVC or PET surface. The handle of the toothbrush has TPE (thermoplastic elastomer), and a certain amount of mineral oil . After being sucked in by the plastic, it is stuck with the paper through the plastic heat seal, but the oil in the TPE penetrates into the paper card through the contact between the TPE and the toothbrush. The phenomenon of
, which we call precipitation and ejection, is caused by the incomplete fusion of molecules in rubber oil and thermoplastic elastomer tpe material . There are not many reasons, but these two conditions are nothing more than:
1. In the production process of thermoplastic elastomer TPE materials, the oil absorption is insufficient and the mixing is insufficient! Causes the product to spit oil.
2, the material selected is too soft, less than 20A, which will also cause oil spit due to problems with the TPE equipment. The solution to
is to find a way from the recipe of TPE raw materials, try to find materials with higher hardness and dryness, and use SEBS as the main material as possible! Also, the technology of the TPE manufacturer supplied to you must be improved, otherwise it will be difficult to solve this problem! Because the softness and hardness of TPE materials are adjusted by rubber oil, the softer the hardness, the more rubber oil components! On the contrary, the less rubber oil, the less oil, the less chance of spitting oil naturally. There is also the solubility of cycloane oil and TPE materials, which is also very important.
It is recommended to use thermoplastic elastomer with higher hardness as much as possible. Generally speaking, hardness materials between 40A and 60A are better for toothbrush handles, because the actual hardness of our skin is about 50-55A, so 50-60A is recommended when we touch the skin, so the softness and hardness are the most appropriate when we hold the toothbrush handle! The most comfortable feel!
TPE glued toothbrush handle precipitates oil. Most toothbrush products are made of thermoplastic elastomer TPE and polypropylene PP materials, while electric toothbrushes are made of thermoplastic elastomer TPE and ABS. In addition to oil spitting, special attention should be paid to the surface wear resistance and adhesive properties of the product.
