6 Types of Rubber Materials Used in Molding Processes

Rubber materials are used in various applications, including automotive parts, medical devices, and other consumer products. Sectors like the military, defense, appliance, and solar industries all depend on rubber molding techniques to produce durable and flexible components. Rubber materials come in different forms, from natural rubber to silicone and others. Here are six types of rubber materials used in molding processes:

1. Natural Rubber

Seals, gaskets, and vibration mounts are commonly made of natural rubber, which is known for its high tensile strength and stretchability. The material is extracted from the latex of rubber trees and performs well in applications requiring wear resistance and temperature stability. Natural rubber is used to make various products, including tires, footwear, belts, and hoses. The material can be sourced sustainably, but it may be less resistant to oils and chemicals.

2. EPDM

Ethylene-propylene diene monomer, or EPDM, is another material used in various rubber molding processes. This rubber offers heat and electrical insulation and is resilient to oxidation and UV radiation. EPDM rubber is used to produce weatherstripping, seals, and other products for outdoor applications that require protection from weathering and ozone exposure. This rubber is also resistant to acids, alcohol, coolants, and steam, making it suitable for automotive components.

3. SBR

Styrene-butadiene rubber, or SBR, is a general-purpose synthetic alternative to natural rubber. SBR offers abrasion resistance, high impact strength, and aging stability. This material is more affordable than natural rubber and is commonly used to produce tires and conveyor belts. SBR is also used to make various molded rubber parts, from cable insulation and roll covers to seals for industrial equipment components. The material is non-toxic and suits applications requiring significant wear resistance.

4. Neoprene

Polychloroprene or neoprene is a synthetic rubber valued for its durability, flexibility, and resistance to oil, weather, and chemicals. Neoprene offers a more resilient alternative to natural rubber and is used in outdoor industrial applications. The material is featured in gaskets, hoses, belts, wetsuits, and protective covers. Neoprene is also heat and flame-resistant, making it ideal for applications requiring insulation and cushioning. The material is a standard choice for aerospace, marine, and automotive industries.

5. NBR

Nitrile rubber, or acrylonitrile-butadiene rubber (NBR), is a synthetic elastomer with a high resistance to oil, fuel, and other chemicals. The material offers high tensile strength and stability across a wide range of temperatures. Manufacturers produce two types of nitrile rubber: carboxylated and hydrogenated. Carboxylated nitrile rubber features an acidic monomer that results in improved tensile strength and resistance to abrasion and tears. Hydrogenated nitrile rubber offers improved resistance to heat, chemicals, and ozone. NBR is heavily used in the automotive industry for O-rings, seals, gaskets, and hoses.

6. Silicone

MQ, VMQ, and PVMQ silicone rubbers are synthetic transparent elastomers featured in medical devices, automotive parts, bakeware, and other products. The material is resistant to high temperatures and remains flexible at low temperatures, making it ideal for various applications. Silicone meets strict material requirements in various industries, including construction, medical, and automotive.

Speak to a Rubber Molding Company

Rubber and plastic molding companies use many rubber materials, including thermoplastic elastomers and isoprene, to create custom products for their customers. These materials are used to make various items, from bearings, springs, and tubing, to damping, syringes, and catheters. Contact a rubber molding specialist today to learn more about the materials they use in their molding processes.