一. What does it mean for silicone hoses to "age"
In engineering and materials, "aging" means more than only the physical aging of materials. It also means that their performance will not become better over time. Some common signs of deterioration in silicone hoses are:the elasticity goes down, the material gets tougher, or it breaks. The hose used to be soft it looks has changed. Some low-quality silicone may also go powdery, along with fading, fogging, and losing its shine.the sealing and safety performance is getting worse. Silicone hoses can develop micro leaks, lose their ability to resist pressure, and even give out smells or small amounts of substances after they have been used for a long time. This can be bad for food or medical safety.
二. From the nature of materials
From a materials science point of view, silicone is not a material that "ages" easily. It is actually a kind of polymer material that doesn't break down easily over time.The fundamental part of silicone hoses is the siloxane (Si-O-Si) main chain structure. This structure has a lot of benefits over regular rubber (such natural rubber, nitrile rubber, and PVC).the energy of the chemical connection is high. Silicon-oxygen bonds have a far higher bond energy than carbon-carbon bonds. This means that silicone is less likely to break down in high-temperature, oxygen, and UV conditions.Once again, it is very resistant to ozone and UV rays. This is also a big reason why silicone hoses can last a long time in outdoor equipment, on the backs of home appliances, in lighting fixtures, and in other places where they are exposed to the elements.when used the same way, silicone hoses normally age considerably more slowly than PVC hoses, rubber hoses, and TPU hoses.
三. Why do some silicone hoses appear like they will age quickly
Why do so many people say that silicone hoses "become hard, yellow, or fail after a short period of use" yet silicone itself is resistant to aging? The causes usually have to do with the following things.The grade of the raw materials is very different.The grade of silicone raw materials used has a big effect on how good silicone hoses are. There are several levels of silicone raw materials on the market, such as industrial grade, food grade, medical grade, and so on.The following difficulties are common with low-quality silicone:Put in a lot of filler to lower costs.
A lot of impuritiesThis kind of silicone may seem soft when you first use it, but its molecules might change when they are exposed to extreme heat, water vapor, or long-term pressure, which speeds up the aging process.Use for a long time at too high of a temperature or pressureSilicone hoses can handle high temperatures well, but it doesn't mean they can be used for a long time outside of the circumstances they were made for. For instance:It can handle temperatures up to 180 °C, but it can work for a long period at temperatures beyond 200 °C.Even high-quality silicone can have problems like aging too quickly and losing its suppleness in this scenario.
Contact with the wrong mediaSilicone hoses work well with things like water, air, steam, food, alcohol, and more. However, they are not fully safe for every chemical media.These conditions will speed up the structural changes of silicone molecules, which will make them age much faster.
四. How silicone hoses wear out over time in different situations
In real life, whether silicone hoses "age" quickly or not typically depends on how they are used.Silicone hoses typically come into touch with hot water, steam, and food media in food and drink equipment such coffee machines, water dispensers, and filling machines. If you choose and utilize food-grade silicone that meets safety standards and keep it in a tolerable temperature range, it can last for several years or even longer, with a slow aging process.Silicone hoses used in medical devices need to be sterilized at high temperatures and pressures many times. This kind of situation needs more materials and usually employs medical-grade silicone. after being sterilized several times over a lengthy period of time, the hose's suppleness may slowly go down. This is a typical part of the material's aging process and not a sign of poor quality
五. How can you successfully slow down the aging of silicone hoses?
In real-world engineering, careful design and choice can greatly increase the life of silicone hoses you need to choose the right grade of silicone hose. You should only utilize food-grade silicone when making contact with food, and medical-grade silicone when working in a medical setting. Don't combine them. make sure to stay within the rated temperature and pressure range to avoid running the machine at too high of a load for too long.
