CR Rubber Compound for Rubber Hose

Xiamen SLD Rubber is the factory of CR Rubber Compound for Rubber Hose. It is a synthetic rubber polymerized from chloroprene as the main monomer and is widely used in the manufacturing of industrial rubber hoses. Our formula has been optimized, and it demonstrates excellent fluidity and vulcanization speed during subsequent extrusion and vulcanization processes, which helps customers enhance production efficiency.

Key points of formula design

Polymer selection:

Choose the G type as per requirements, such as GN/A, pre-crosslinked type (W type), or膏状 CR. G type CR has good adhesion, while W type CR has better heat resistance.

Sulfurization system：

CR Rubber Compound for Rubber Hose is sulfurized with metal oxides. Magnesium oxide not only participates in crosslinking but also absorbs hydrogen chloride to prevent resinification. To improve heat resistance， accelerator NA-22 or TMTD is used in combination.

Antioxidant system：

To extend the lifespan of the hose， phenolic or amine-based antioxidants still need to be added to protect against dynamic fatigue and thermal aging.

Reinforcing fillers：

Commonly， N550 and N660 are used to balance strength， wear resistance， and flexibility. For the outer layer of colored or light-colored hoses， silica black combined with silane coupling agent can be used.

Parameter

Application category

CR Rubber Compound for Rubber Hose exhibits excellent weather resistance, ozone resistance, mechanical strength, and moderate oil resistance. It is used in industrial hoses, automotive hoses, hydraulic hose sheaths, air hoses, and outdoor applications.

FAQ

What type of hoses is it suitable for manufacturing?

Industrial air hose

Car hose

Outer layer of hydraulic hose

Fuel hose

Refrigeration pipe

Construction machinery hose

What's the difference from EPDM?

CR: Better oil resistance

EPDM: Stronger heat resistance, water resistance, and ozone resistance

Based on the environmental requirements, the choice should be: oil environment → CR/NBR, water vapor environment → EPDM, outdoor long-term exposure → CR or EPDM.

Is it suitable for outdoor use?

Yes, it has the characteristics of anti-ultraviolet, anti-ozonization, and anti-decomposition.

Can the production meet the standards of ISO 1307 or EN 853 for hoses?

ISO 1307 and EN 853 are the finished product standards for hoses. They not only require the performance of the rubber compound, but also assess the burst pressure, bonding strength, etc. of the hose. The CR Rubber Compound for Rubber Hose of Xiamen SLD Rubber has the tensile strength of >12MPa, elongation at break, aging resistance, and volume change rate of oil resistance, which can meet the requirements of the above standards for the rubber compound layer.