1. Bleaching of Silicone Reservoir

Albinism is when a compound such as a stabilizer migrates to the surface of the finished product, and the surface appears white as if sprayed with powder. The reason is mainly caused by excessive coordination of stabilizer or incompatibility with polymer. Therefore, the stabilizer with good compatibility with polymer should be selected or the amount of stabilizer should be controlled in the best range. Secondly, it is also very effective to replace the stabilizer with a high relative molecular weight.

There are also stabilizers that perform their functions by migrating to the surface of the molded product. For example, antistatic agents, lubricants, etc. For this stabilizer, it is necessary to select a stabilizer that is difficult to bleaching even after migration.

Silicone Reservoir rarely suffers from bleaching when it is used in an ordinary environment. However, when it is used outdoors for a long time in high temperature, humidity and humidity, it is necessary to add heat stabilizer and weather-resistant stabilizer to the silicone reservoir to improve its durability. Especially at high temperature, because of its easy to cause migration, so the choice of stabilizer is also very important.

2. Silicone Reservoir becomes sticky

Compared with resin, the surface of Silicone Reservoir with soft silicone reservoir is more prone to sticky phenomenon. It is mainly caused by the formation of low molecular weight polymers, plasticizers and stabilizers migrating to the surface due to aging. However, in either case, it is easier to identify the substance involved by analyzing the sticky component using infrared spectroscopy (IR).

From the point of view of the material itself, usually hair viscosity is excessive filling oil, especially ultra-low hardness of TPE-S, or TPV. For TPV, if the degree of vulcanization is not enough, it is also easy to sticky.

The viscosity is mainly due to the high molding temperature and the formation of low relative molecular mass materials due to thermal decomposition. Although the setting temperature of the molding machine itself does not reach the thermal decomposition temperature, the shear heat generation in the molding process sometimes makes it temporarily reach high temperature. As a countermeasure, reducing the molding temperature, low shear, using nitrogen to purify the hydraulic cylinder of the molding machine are very effective. In addition, when the molding machine is suspended, the rubber material is left in the mold cavity of the molding machine in a molten state for a long time, and sometimes it will be sticky due to thermal aging.

In addition, products used at high temperature are easy to appear sticky phenomenon. Therefore, it is very important to choose the type and dosage of stabilizer and softener.

3. Silicone Reservoir is aging

Compared with inorganic materials and metal materials, polymer materials have poor heat resistance, UV resistance linear (relatively easy to aging). The mechanical properties of most products are significantly reduced due to aging, and the appearance quality becomes worse. The aging phenomenon can be inhibited to a certain extent by combining with the stabilizer of heat and weather resistance.

Silicone Reservoir https://www.nblukemed.com/Surgical_Drains_Series/Silicone_Reservoir.html