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What role does silicone oil have in polyurethane foaming machine?

1. Reduce the mixing of impurities to avoid local surface tension of the bubble hole to cause collapse and cavity.

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2. The reduction of surface tension is conducive to the preparation of uniform microbubbles and stable bubbles to reduce gas diffusion.

3. Increase the strength of bubble hole membrane wall and channel.

4. Increasing the viscosity of the material faster will help slow down the rapid thinning and foaming of the bubble hole.

5. When the amount of silicone oil in the polyurethane foaming machine is low, the foam with larger pore diameter is unstable. When the dosage is high, the pore diameter decreases correspondingly and the foam surface area increases. If too much is used, the bubble will collapse when it reaches the highest point. The reason is that the bubble wall is too thin and the support strength is not enough.

In addition, the production process of silicone oil is very complex and strict. Different formulations, processing conditions and production methods make the final product very different. That is to say, different silicone oil directly affects the quality of your products, including: appearance, feel, hardness, tensile strength.

Too much or too little silicone oil can affect the quality of the foam. Dosage: make the late foam wall elastic increase, should not burst, bubble hole fine. Create the obturator foramen. Less amount: too little amount of silicone oil, insufficient foam stability, serious and bubble, bubble hole thick and uneven, even collapse bubble.