In the last piece, we learn the bubble problem in the silicone hose. This piece let’s learn the others next.
The impurity “black point” is a common problem for silicone hose. Besides silicone hose, the black point in other silicone products in hard to remove. While medicine grade silicone hose should be highly transparent. Therefore, we should control the black point in the raw material. Strictly control the impurity when mixing the rubber. Besides, we should keep the whole production line clean.
This is the problem we have to concern on the extruding tape. The mould is to press the silicone to moulding through holes. Therefore, if not control the temperature, pressure and extruding speed, there may be distortion.
Uneven wall thickness
If the heating and cooling system are unstable, or the screw speed changes, the material temperature will fluctuate. While the pressure control the resistance of filter net and filter plate. With the different hardness, the unreasonable pressure adjustment may cause the wall thickness uneven. In the meantime, the extruding speed determines the thickness and shape. Therefore, different thickness should in different speed.
From the above contents we learned how to control the quality in the production and processing. Next let’s learn how to recognize it in our daily life.
Look and touch
Medical grade silicone hose is bright and transparent. If you touch it, you will find it’s smooth. But the bad quality silicone hose looks turbid and is harsh handle.
There will be some smell on the hose because the reserve of vulcanizer. But it will disappeared few days later. However, bad quality silicone hose has terrible smell and hard to eliminate.
Normally other silicone will be black after burn, while medical grade silicone hose will be white.
In the two pieces we learn how to keep a high quality medical grade hose. If you have any questions about it, welcome to contact OrientFlex. We are an expert in hose solutions.