• Thermal Insulation Materials
Rubber insulation materials, especially closed-cell foam rubber, play a crucial role in building, HVAC, and industrial piping insulation. Their core function is to prevent heat exchange (cold or heat preservation) and condensation formation.
The main base materials are ethylene propylene diene monomer (EPDM) rubber and nitrile rubber (NBR)/polyvinyl chloride (PVC) blends. The foams made from these materials have a large number of independent closed-cell structures, resulting in extremely low thermal conductivity and very low water vapor permeability.
• Cylinder Gaskets and Oil Seals
Cylinder gaskets (static seals) and oil seals (dynamic seals) are the most classic applications of rubber in sealing, hailed as the "guardians" of industrial equipment, preventing the leakage of fluids (oil, water, gas).
• Vibration Damping
The viscoelasticity of rubber makes it an ideal material for vibration damping and sound insulation, effectively absorbing vibration energy, reducing noise, protecting equipment, and improving comfort. The design of vibration damping products is just as important as the rubber formulation. By changing the product's shape (e.g., hollow, bowl-shaped) and internal structure, its stiffness and damping performance at specific frequencies can be precisely controlled.
Rubber is widely used in the automotive industry for engine mounts, suspension bushings, and exhaust system hangers; in rail transportation for track damping pads and vehicle bogie bushings; in the construction industry for building seismic isolation bearings; and in large equipment base damping pads.
• Adhesives
Rubber-based adhesives utilize the high elasticity and viscosity of rubber to provide flexible connections, suitable for bonding different materials, especially in applications requiring dynamic stress or thermal expansion and contraction.
• Sheaths
Rubber sheaths are primarily used to protect cables, hoses, or precision components from abrasion, impact, chemical corrosion, and harsh environments. Due to its comprehensive properties of weather resistance, ozone resistance, flame retardancy, and oil resistance, neoprene rubber is the preferred material for cable sheaths and the outer layer of industrial hoses.
• Plastic Modification
Rubber particles or rubber elastomers are used to toughen brittle plastics, a classic area of polymer blending modification.
The core principle is to use rubber particles (such as styrene-butadiene latex (SBR), the butadiene rubber phase in acrylonitrile-butadiene-styrene copolymer (ABS), and ethylene propylene diene monomer (EPDM)) as a dispersed phase, blended with a brittle plastic matrix (such as polystyrene (PS), polypropylene (PP), and polyamide (PA)).
When the material is subjected to impact, these tiny rubber particles can induce crazing and absorb a large amount of impact energy, thus significantly improving the plastic's impact resistance (toughness) without excessively reducing its rigidity and strength.
• Medical and Safety Gloves
Rubber gloves are essential in the medical and industrial protective fields, providing a barrier against cross-infection and chemical contact. Gloves are primarily produced through a hand-molding impregnation process and their properties and ease of wear are adjusted through vulcanization, chlorination, and surface treatments (such as powdering and polymer coating).