Rubber Application

Natural Hard Rubber (NHR)

Ha Thanh exclusively applies the technology, materials, and process techniques for rubber lining from OHJI Japan, providing a full-package service from rubber materials to complete project execution.

Natural Hard Rubber (NHR) is a hard rubber used for corrosion protection of equipment operating in inorganic chemical environments such as hydrochloric acid, dilute sulfuric acid, phosphoric acid, and caustic soda equipment in water treatment systems. A key feature of hard rubber is its high heat resistance and suitability for corrosion protection against a wide range of chemicals.

  • Reliable application
  • Precise thickness
  • Strong adhesion
  • Easy defect detection
  • Easy to repair
  • Very durable service life

Characteristics

  • ( 01 )

    High Hardness

    NHR has superior hardness compared to natural rubber, providing high strength and durability for various applications.
  • ( 02 )

    Chemical Resistance

    NHR can withstand many types of chemicals, including acids and alkalis, making it suitable for harsh chemical environments.
  • ( 03 )

    Electrical Insulation

    NHR is a good insulating material, ideal for electrical and electronic applications.
  • ( 04 )

    Water Resistance

    NHR is waterproof, protecting products from the effects of moisture and water.

Application

Ha Thanh exclusively applies the technology, materials, and process techniques for rubber lining from OHJI Japan, providing a full-package service from rubber materials to complete project execution.

Rubber mats with a thickness from 3mm to 10mm (1m width) and unlimited length, 100% free of air bubbles. Widely used for anti-corrosion lining for the equipment operating in the conditions below.

Due to its excellent chemical resistance, impermeability to solutions and steam, and strong bond strength, natural hard rubber is used as the primary material for rubber linings in applications requiring chemical resistance, corrosion protection, and high-temperature tolerance.

OHJI RubberCharacteristicsApplicationsVulcanization conditions Hardness
(Type D)
AutoclaveOpen steam
OHJI E-5
  • Hard rubber used for chemical resistance under high temperature condition.
  • Less flexible than E-7.
  • Electrolytic equipment
  • Recovery system for hydrochloric acid and alcohol
  • Bromine production equipment
● 70 ~ 90
OHJI E-5i
  • Compound of low Ca and Mg.

  • Special for Cell-liquor of IM electrolysis

● 60 ~ 80

OHJI E-7 (3mm)

[STANDARD]

  • Wide range of corrosion resistance.
  • Excellent flexibility.
  • Standard grade of natural hard rubber.

  • Lining for equipment containing HCl, H2SO4, and NaOH.

● 65 ~ 85
OHJI E-7i
  • Compound of low Ca and Mg. 
  • IM electrolysis
  • Used for the case of disrelishing metal ion
● 70 ~ 90
OHJI E-15
  • General hard rubber for site application.
  • Used when the organic solvent such as SO is mixed.
  • Same as E-7
 ●60 ~ 80
OHJI E-16
  • Fast vulcanizing hard rubber.
  • Used as SH type (Soft-Hard-Soft lining).
  • Lining for equipment containing HCl, H2SO4, and NaOH.
  • Same as E-7
 ●60 ~ 80
OHJI E-18
  • For gaseous chlorine for site application.
  • Lining for equipment used in wet chlorine gas scrubbing or in electrolysis tanks.
  • Same as E-8
 ●65 ~ 85
OHJI E-20
  • Compound of low Ca and Mg. 
  • Hard rubber for site application.
  • Lining for ion electrolysis equipment.
  • Application for metal ions.
  • Same as E-7i
 ●60 ~ 80

*OHJI E-7, OHJI E-15 rubber models meet food safety and hygiene requirements and are certified by the Ministry of Health, Labour and Welfare of Japan (in accordance with Regulation No. 85).

Ha Thanh is the only company in Vietnam that supplies genuine OHJI Hard Rubber (E-5, E-7, E-7i, E-15, E-16, E-18, E-20) manufactured by OHJI Japan in Vietnam.

Images

Other materials

  • Rubber Application

    Special Material (EPDM)

    Specialty Rubber (EPDM) is a type of synthetic rubber made from ethylene, propylene, and a small amount of diene. EPDM is notable for its resistance to weather, ozone, UV radiation,
  • Glass Flake Application

    Glass Flake Application

    Glass flake mortar lining is a type of composite material coating composed of vinylester and novolac-based compounds, ceramic powder, combined with ultra-thin glass flake reinforcement, and thermosetting resins resistant to
  • Rubber Application

    Natural Soft Rubber (NSR)

    Natural Soft Rubber (NSR) stands out for its high elasticity and good load-bearing capacity. NSR is widely used across various industries due to its flexibility and high durability.
Rubber Application

Special Material (EPDM)

Specialty Rubber (EPDM) is a type of synthetic rubber made from ethylene, propylene, and a small amount of diene. EPDM is notable for its resistance to weather, ozone, UV radiation,
Glass Flake Application

Glass Flake Application

Glass flake mortar lining is a type of composite material coating composed of vinylester and novolac-based compounds, ceramic powder, combined with ultra-thin glass flake reinforcement, and thermosetting resins resistant to
Rubber Application

Natural Soft Rubber (NSR)

Natural Soft Rubber (NSR) stands out for its high elasticity and good load-bearing capacity. NSR is widely used across various industries due to its flexibility and high durability.

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