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Rubber Material-IIR

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What is IIR?

“IIR” stands for Isobutylene Isoprene Rubber, which is a synthetic rubber compound commonly known by its trade name “Butyl rubber.” It is a copolymer of isobutylene and isoprene, and it possesses unique properties that make it suitable for a range of applications. Butyl rubber is known for its excellent air and gas impermeability, good weather resistance, and low gas and moisture permeability.

IIR Information

Process: Injection Molding, Compression Molding

Colors: Custom Colors

Tolerance: ±0.5mm

Price: Cost-effective

Application: automotive (tire inner liners, hoses), pharmaceuticals (stoppers), construction (sealants), and more.

Recommended Wall Thickness: 1mm-10mm or even thicker

IIR Properties

IIR is known for its air tightness and is often used in air sealing. It can have good heat resistance, oxygen resistance, ozone resistance, and sunlight resistance. In addition, it offers excellent resistance to bases, acids, and oxygenated solvents. It has a high energy absorption capacity and can be a good electrical insulator.

Density (g/cm³)0.9-1
Hardness (Shore A)30- 90
Tensile Strength (MPa)Good
Elongation at Break (%)Excellent
Tear Strength (N/mm)Good
Abrasion ResistanceGood
Temperature Range (°C)-40 to 120
Electrical InsulationGood
Chemical ResistanceGood
Solvent ResistanceGood
Oil ResistanceExcellent
Adhesion to MetalsGood
Compression SetGood
UV and Weather ResistanceGood

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