Which is stronger and more durable, PVC or silicone? Both of them have their own abilities, but overall, silicone is more durable. Silicone has stable chemical properties, good physical properties, and is not easily aged or worn out; PVC has decent hardness and impact resistance, but its performance may decrease over time due to environmental factors.
1.Is the material stable, resistant to sunlight and heat?
The molecular structure of silicone is unique and its chemical properties are particularly stable. It is not afraid of cold or heat (from minus 40 degrees Celsius to over 200 degrees Celsius), and it is not easily cracked, hardened, or brittle under wind, sun, or ozone environments. Silicone sealing rings can maintain elasticity even after being used on high-temperature equipment for 3 years; But the same PVC sealing ring, under the same conditions, will harden after about a year of use. PVC contains chlorine, and if it is exposed to temperatures above 60 degrees Celsius or direct sunlight for a long time, it is prone to damage, releasing a gas that can cause the material to become brittle and crack. For example, outdoor PVC water pipes may age and leak after 3-5 years of use, while silicone water pipes can last 8-10 years in the same environment.
2.Will it deform if it is wear-resistant or not?
Silicone has a dense molecular structure and is also very elastic. After being ground or compressed, it can quickly return to its original state without leaving permanent deformation. Under the same pressure, silicone products can be ground 100000 times, with only slight scratches on the surface; But after grinding PVC products for about 50000 times, there are obvious scratches and pits. PVC has a high hardness (similar to that of a plastic ruler), and its impact resistance is better than silicone in a short period of time, but it is more brittle and easily broken by a strong impact. For example, children's toys, silicone dolls, are still in good condition after being thrown around; Toys made of PVC may crack at the corners.
3.Are you afraid of chemical corrosion?
Silicone is not afraid of acids, alkalis, oils, and other substances. It will not swell or deteriorate when in contact with cleaning agents or cosmetics. Silicone has been exposed to oil stains and hot detergent for a long time, and its performance has not changed much. PVC is afraid of organic solvents, such as alcohol and gasoline, which can become soft, swollen, and even melt off when touched. For example, if the PVC keychain is stained with nail polish, the surface will become sticky and deformed soon.
4.How should I choose?
If it is used outdoors for a long time, in high temperature environments, or frequently in contact with chemicals (such as sealing rings, high-temperature resistant parts), choosing silicone is more durable; If it is for short-term use, requires high hardness, and has a relatively stable environment (such as hard pipes, cheap daily necessities), PVC can also meet basic needs. The choice of materials depends on the specific application: if long-term durability and stability are important, silicone is preferred; If you want to save money and use it in the short term, and need high hardness, then PVC can be considered. These two materials each have their own advantages, but in terms of overall strength and durability, silicone is better able to withstand the test of time and environment.
