Why Does Silicone Milk Bottle Produce Oil?

- Oct 09, 2020-

The silicone baby bottle is a baby bottle made of liquid silicone (LSR). It does not contain bisphenol A and will not break. It has excellent transparency, tear resistance, resilience, yellowing resistance, heat aging resistance and weather resistance. When making milk bottles, the viscosity of silica gel is moderate, easy to operate, and the product has high transparency. It can be seen whether the casting material in the mold has defects such as bubbles, the linear shrinkage rate is ≤0.1%, and the size of the replicated product is precise. However, many people have found oily phenomenon when using silicone baby bottles. What is the reason?

硅胶奶瓶


Silicone baby bottle


The oil stains on the surface of silica gel are mainly limited to the hardness and softness of the product. From the material aspect, if the hardness and softness of the silica gel material is soft, the additives and the amount of silicone oil added exceed more than 10% of the silica, resulting in low hardness materials Silicon molecules are destroyed, put into high temperature, liquids and various types of air will penetrate the surface.


Its main root cause is the white mineral oil added to the silicone oil and the material. The dosage is out of range or the material is unstable. It is likely to conflict and spill oil on the surface. The solution is to find the source material of the silicone protective sleeve manufacturer. The problem, under normal circumstances, this phenomenon may occur when the hardness of silicone products is below 30 degrees, but oil will not appear when the hardness exceeds 40 degrees. Therefore, the softer the silicone protective cover, the more likely it is that the surface of the silicone protective cover will have oil.


In the process of making silicone molds, it is better for customers not to add any silicone oil. If necessary, the amount of silicone oil added should not exceed 5%-10%. Because the excessive addition of silicone oil will destroy the molecular weight of silica gel, the resulting mold will not be resistant to acids and alkalis and not resistant to aging.