Silicone vs Rubber. That’s a big question comes while choosing a material for your next product. Both have unique qualities, which make them suitable to be used for a host of applications.
However, which one should be your choice?
Well, this article we will explore characteristics and benefits along with ideal uses of both materials to facilitate decisions on which material better fit.
Let’s dive into it!
Silicone vs Rubber, Brief Explanation
Silicone and rubber are different in chemical nature and properties. These are, however, versatile and rather strong materials.
- Silicone is a synthetic polymer with high-temperature resistance, elasticity, and toughness. The material is not only chemically inert and hypoallergenic but also resistant to ultraviolet light, moisture, and chemicals.
- Natural rubber is basically rubber and offers great elasticity, abrasion, and tensile strength but the worst performance regarding heat and UV resistance compared to silicones.
What are the Key Differences Between Silicone and Rubber?
Silicone and rubber have differences in their nature. Here is a comparison of both:
Resistance to Temperature
Silicone: Highly resistant to extremely high and low temperatures and usually tolerates between -60°C and 230°C, and, for highly specialized grades, even more.
The strength against the temperature range gives silicone many applications in hot processes or applications such as cookware, car parts, or medical devices.
Rubber: Most of the natural rubber can function in the temperature range from -50°C to 80°C and degrade when used for a long time under high temperatures.
Synthetic rubbers can also be engineered for extreme usage in different temperatures. However, it still acts weaker than silicon when resistance is concerned with regard to heat exposure.
Durability and Service Life
Silicon: It is much more resistant and more durable; all these properties relate to chemical stability, which in turn means a much longer life, especially in outdoor or highly exposed applications.
Rubber: Rubber is a relatively tough and elastic material when subjected to mechanical strain. Natural rubber, however, deteriorates readily from UV sunlight, ozone, and many chemicals.
Synthetic rubbers may be formulated for specific levels of durability, but the rubber is generally less durable than silicone, especially in aggressive environments.
Flexibility and Elasticity
Silicone: The simple answer is Silicone is less elastic than natural rubber. While it will stretch and compress, it does not have the same “snap-back” property as natural rubber.
Its flexibility is excellent, and its suitability includes medical tubing or seals in which high elasticity is not needed.
Rubber: Undoubtedly it is highly elastic. It can stretch significantly and then snap back into the original dimension very rapidly.
It is used in extensive applications where flexibility and elasticity are needed, such as in tires, shock absorbers, and seals.
Chemical Resistance
Silicone is very resistant to chemical corrosion by water, oil, and most acids or bases. This material keeps stable even under extreme corrosion conditions.
Therefore, silicone is used to manufacture chemical seals, medical apparatus, and kitchen utensils.
Natural rubber is more sensitive to oils, fuels, and certain chemicals, which can cause it to break down.
Synthetic rubbers like neoprene or nitrile are engineered for greater chemical resistance, though they typically do not reach the same level of stability as silicone.
Environmental Impact
Silicone: Silicone has a greater environmental cost of production. However it lasts much longer, so it will be replaced less often.
Silicone is not biodegradable, but it’s recyclable, thus providing a more sustainable alternative to longer-term use. It also has a much longer shelf life.
Rubber: Natural rubber is biodegradable, as such rubber is renewable in a literal sense. The lifespan of rubber is lower due to its repeated usage for replacement, while synthetic rubber is derived from petroleum.
However, rubber can be recycled (in tires for example), but can still prove to be less than perfect for the earth as a non-bio-degradable product.
Applications and Uses of Silicon and Rubber
Here is a view of the primary applications and uses of silicone:
Applications of Silicone
Medical and Health Care Devices: Tubing, catheters, and implants are the more common applications in medical devices. Silicone is resistant to bacteria as well as hypoallergenic, with high biocompatibility.
Food and Beverages: Silicone is being used in Molds meant for baking, spatula, and seals of food storage. Silicone is increasingly being used in cookware and kitchen wares because of its heat resistance and non-toxicity.
Electronics and Electrical Insulation: Silicone is non-conductive, heat resistant, and hard. It protects sensitive electronics and is used in Keypads, gaskets, cable insulation, and protective cases.
Automotive and Aerospace Parts: Silicone is resistant to high temperatures and extreme conditions; therefore, it is used on parts that are highly exposed to high heat and pressure in the engine gaskets, seals, and hoses.
Applications and Uses of Rubber
Here are the primary applications and uses of Natural rubber:
Automotive and Transportation: Rubber is elastic and strong. It is suitable for flexible parts that need to absorb shock and resist wear, such as Tires, gaskets, belts, and suspension parts.
Footwear: Rubber is tough, slip-resistant, and shock-absorbing, all protective features for footwear. This makes it perfect for Soles, insoles, and outer parts of shoes.
Industrial Applications: It is resistant to wear, tough, and flexible hence applied for heavy industrial appliances like conveyor belts, hoses, and seals.
Houseware Items: Its flexibility makes it easy for water resistance purposes, with comfort for many household applications requiring grip elasticity. House rubber products mostly include bands, gloves, mats, and grips.
FAQ
Is rubber safer than silicone?
Well, the short answer is no. The fact is, Silicone is safer than Rubber for most purposes involving food and medical uses. It is preferred above Rubber if it has to be in direct contact with human skin. Silicone is non-allergic and meets the needs of those having a latex allergy.
Is rubber a polymer?
Yes, rubber is a polymer! More specifically, rubber is an elastomer, which is a subcategory of polymer that usually exhibits elasticity. In rubber, the chains form a loose structure that stretches and then goes back into its original shape. Both natural and synthetic rubber are polymeric materials with specific properties tailored for flexibility, resilience, and durability.
Does silicone feel like rubber?
Yes, silicone would feel like rubber. Both are soft and pliable, but silicone is still smoother and slightly more “silky” in feel than rubber. Silicones vary by formulation and are not as springy as natural rubber but feel bouncier. Silicone density is higher than rubber, it’s products of the same size can feel a bit heavier.
What to Consider While Choosing Between Silicone and Rubber?
First, thoroughly inspect the features of the desired product. What would suit it best and what kind of features do you want? Silicone is costly compared to rubber, but its benefits justify its costs.
Silicone is excellent if the application involves extreme temperatures. Its resistance to breakdown is higher than rubber. Rubber synthetic types, such as EPDM or neoprene, can take a little warmer but still do not even begin to approach silicone’s thermal resistance.
Silicone is suitable for outdoor applications, sunlight exposure, and chemically harsh environments. Conversely, Some types of rubber are chemically resistant, like nitrile rubber to oils and neoprene to weathering.
In short, if there is concern regarding high temperature and chemical resistance with durability, silicone is the best choice. Yet if high elasticity, cost-effectiveness, and moderate durability are necessary, rubber will suffice.
Conclusion
Silicone and Rubber both have benefits and Disadvantages. Yet, you need to decide which one best suits your needs.
However, finding a reliable source of quality silicone takes time and effort.
Don’t worry; TOGOHK has various types of modified silicone available. Feel free to reach out to us!
More Resources:
Ultimate Guide To HCR Silicone? – Source: TOGOHK
What Is Fluorosilicone? – Source: TOGOHK
Electric outlook: Is silicone conductive material? – Source: TOGOHK
Understanding UL94V-0 Silicone Rubber for Safety Standards – Source: TOGOHK
Silicone Rubber: Comprehensive Guide For You – Source: TOGOHK