They are two different materials. Silicone material belongs to rubber material, while PVC belongs to plastic material.
A: PVC is the world’s third-most widely produced synthetic plastic polymer (after polyethylene and polypropylene). About 40 million tons of PVC are produced each year. It is a thermoplastic polymer. Its properties are usually categorized based on rigid and flexible PVC.
The Raw Material of PVC:
The property of PVC：
B:Silicone rubber is an elastomer (rubber-like material) composed of silicone—itself a polymer—containing silicon together with carbon, hydrogen, and oxygen. The Silicone products can pass the ROHS certificationrohs-certification.pdf and is environmentally friendly reach-certification.pdf.The Silicone products is BPA and Phthalate free phthalate-free.pdf and biodegradable, long-term use, and other characteristics.
There is two kind of silicone material. One is Solid silicone. One is Liquid silicone Rubber.
The Raw Material of Solid Silicone.
The Raw Material of Liquid Silicone Rubber.
A：PVC making process
PVC products are made of polyvinyl chloride and oil together with color paste, and its raw materials are made by heating and cooling microinjection epoxy process.
B: Silicone material only needs to use the silicone to add the color masterbatch to suppress and deploy in mixing machine, then put them in the mold by the heating and cooling to take shape.
Hand touch feeling.
The softness and hardness of both can be adjusted, but the PVC does not have tenacity.
Silicone products have high thermal stability, and the chemical bonds of molecules do not break or decompose under high temperatures.
Silicone is resistant to high and low temperatures and can be used over a wide range of temperatures.The conventional temperature range of -40 ~ 230 degrees within the long-term use.
PVC material is a mainly white powdery amorphous material, density is 1.3-1.5, material vitrification temperature is within 90 degrees, the highest temperature resistance is 170 degrees.
With high temperature, PVC will be automatically decomposed into hydrogen chloride, beyond the temperature range will automatically catalyze decomposition.
Silicone products are generally transparent, with small burning smell and White powder.
PVC products will turn black after burning and smell bad when burning.
Silicone material has a good silicon molecular connecting strength, the rebound strength will be much better.
PVC material products has poor rebound.
Silicone material is more expensive than PVC products in production and manufacturing.
The raw material price of PVC products is low, which is made of synthetic materials.
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From the above differences, we can see that silicone material is safer than PVC, which is more suitable for food and medicine materials.
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