Natural hard rubber (NHR)

Our rubber materials use for application has imported from OHJI (Japan) manufacture. We provide rubber sheet, adhesive, materials and the supervisor which will be best suited for your needs.

SKU: NHR001 Categories: Application rubber, Materials

Description
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Characteristics of Natural Hard Rubber (NHR)

	Hard Rubber
Weather	◎
Heat	O
Low Temperature	x
Acid	◎
Alkali	◎
Abrasion	x
Vapor Permeability	◎
Shock	x

◎
Excellent

O
Good

△
Not Good

X
Bad

Chemical Resistance of Rubber Lining

Chemical resistance are determined according to test results and actual long-term performance. And accurate material selection requires careful consideration in terms of operating conditions and specifications of equipment.

Therefore, please consult with us in advance for selection of rubber material against your chemical.

Inorganic Acids

Chemical	Formula	Conc. (%)	Hard Rubber E-7
Chemical	Formula	Conc. (%)	RT	90°C
Sulfuric Acid	H2SO4	10	O	O
Sulfuric Acid	H2SO4	30	O	O
Sulfuric Acid	H2SO4	50	O	O
Sulfuric Acid	H2SO4	70	O	X
Hydrochloric Acid	HCl	10	O	O
Hydrochloric Acid	HCl	35	O	O
Nitric Acid	HNO3	1	X	X
Sulfurous Acid	H2SO3	0.5	O	O
Phosphoric Acid	H3PO4	–	O	O
Hydrofluoric Acid	HF	1	O	O
Hydrofluoric Acid	HF	48	∆	X
Carbonic Acid	H2CO3	–	O	O
Chlorine Water	Cl2	satu	O	∆
Chlorine Gas	Cl2	wet	O	O
Hydrobromic Acid	HBr	40	O	O
Hydrogen Sulfid Water	H2S	–	O	O
Chromic Acid	H2CrO4	1	∆	X

O: Satisfactory ∆: Marginal X: Unsatisfactory

Inorganic Alkalis

Chemical	Formula	Conc. %)	Hard Rubber E-7
Chemical	Formula	Conc. %)	RT	90°C
Caustic Soda	NaOH	48	O	O
Caustic Potash	KOH	25	O	O
Aqua Ammonia	NH₄OH	28	O	∆

O: Satisfactory ∆: Marginal X: Unsatisfactory

Inorganic Salts Solutions

Chemical	Formula	Conc (%)	Hard Rubber E-7
Chemical	Formula	Conc (%)	RT	90°C
Sodium Hypochlorite	NaClO	–	∆	X
Calcium Hypochlorite	Ca(ClO)₂	–	O
Sodium Chlorate	NaClO₃	–	O	O
Potassium Chlorate	KClO₃	–	O	O
Sodium Chloride	NaCl	–	O	O
Calcium Chloride	CaCl₂	–	O	O
Zinc Chloride	ZnCl₂	–	O	O
Ammonium Chloride	NH₄Cl	–	O	O
Sodium Sulfate	Na₂SO₄	–	O	O
Sodium Bicarbonate	NaHCO₃	–	O	O
Potassium Bichromate	K₂Cr₂O₇	–	O	∆
Sodium Sulfite	Na₂SO₃	–	O	O
Potassium Sulfite	K₂SO₃	–	O	O
Sodium Sulfide	Na₂S	–	O	O
Potassium Sulfide	K₂S	–	O	O
Sodium Thiosulfate	Na₂S₂O₃	–	O	O
Sodium Phosphate	Na₃PO₄	–	O	O
Potassium Chloride	KCl	–	O	O
Ammonium Carbonate	(NH₄)₂CO₃	–	O	O
Ferric Chloride	FeCl₃	–	O	O
Ammonium Sulfate	(NH₄)₂SO₄	–	O	O
Stannous Chloride	SnCl₂	–	O	O
Chromium Chloride	CrCl₂	–	O	∆
Nickel Sulfate	NiSO₄	–	O	O
Silver Nitrate	AgNO₃	–	O	∆
Aluminum Sulfate	Al₂(SO₄)₃	–	O	O
Sodium Silicate	Na₂O . SiO₂	–	O	O
Sodium Aluminate	NaAlO₂	–	O	O
Magnesium Hydroxide	Mg(OH)₂	–	O	O
PAC	[Al₂(OH)nCl₆-n]m	–	O	O

O: Satisfactory ∆: Marginal X: Unsatisfactory

Organic Acids

Chemical	Formula	Conc. (%)	Hard Rubber E-7
Chemical	Formula	Conc. (%)	RT	90°C
Acetic Acid	CH₃COOH	10	O	O
Glacial Acetic Acid	CH₃COOH	10	O	∆
Formic Acid	HCOOH	90	O	∆
Oxalic Acid	(COOH)₂	20	O	O
Butyric Acid	CH₃CH₂CH₂COOH	100	O	∆
Tartaric Acid	(CH OH COOH)₂	50	O	O
Lactic Acid	CH₃CH(OH)COOH	25	O	O

O: Satisfactory ∆: MarginalX: Unsatisfactory

Organic Compounds

Chemical	Formula	Conc. (%)	Hard Rubber E-7
Chemical	Formula	Conc. (%)	RT	90°C
Acetone	CH₃COCH₃	–	∆	∆
Methanol	CH₃OH	–	O	O
Ethanol	C₂H₅OH	–	O	O
n-Propylalcohol	C₃H₇OH	–	O	O
n-Butanol	C₄H₉OH	–	O	∆
Formaldehyde	HCHO	–	O	O
Glycerin	C₃H₅(OH)₃	–	O	O
Ethylene Glycol	(CH₂OH)₂	–	O	O
Triethanolamine	N(CH₂CH₂OH)₃	–	O	O
Glucose	C₆H₁₂O₆	–	O	O

O: Satisfactory ∆: MarginalX: Unsatisfactory

Description

Natural Hard Rubber (NHR)

Our rubber materials use for application has imported from OHJI (Japan) manufacture. We provide rubber sheet, adhesive, materials and the supervisor which will be best suited for your needs.

General Application Natural Hard Rubber (NHR)

Good for chemical resistance, vapor permeability and strong bonding strength achieve many application as main rubber lining material.

OHJI Material	Characteristics	General Application	Curing Method		Hardness
OHJI Material	Characteristics	General Application	Autoclave	Open steam	Hardness
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 Type D
OHJI E-5i	Compound of low Ca and Mg.	Special for Cell-liquor of IM electrolysis	●		60 ~ 80 Type D
OHJI E-7 [STANDARD]	Wide range of corrosion resistance. Excellent flexibility. Standard grade of natural hard rubber.	Hydrochloric acid, Dilute sulfuric acid, Phosphoric acid, Caustic soda, etc	●		65 ~ 85 Type D
OHJI E-7i	Compound of low Ca and Mg.	IM electrolysis Used for the case of disrelishing metal ion	●		65 ~ 86 Type D
OHJI E-8	Used for oxide and osmotic agent, such as gaseous chlorine.	For equipment for gaseous chlorine (wet) of electrolysis in saturated	●		70 ~ 90 Type D
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 Type D
OHJI E-16	Fast vulcanizing hard rubber. Used as SH type (Soft-Hard-Soft lining).	Same as E-7		●	60 ~ 80 Type D
OHJI E-18	For gaseous chlorine for site application.	Same as E-8		●	65 ~ 85 Type D
OHJI E-20	Hard rubber for site application. Compound of low Ca and Mg.	Same as E-7i		●	60 ~ 80 Type D

* With regard to service condition, in the case of food-related, E-7 and E-15 are certified by the Japan Ministry of Welfare No.85.

OHJI rubber sheeting

● Accurate and uniform thickness

● No air pocket in sheet

● Better and longer corrosion perfomance

● Best sheet method rubber lining

Feature of rubber lining

● Chemical resistance

● Shocket restiance

● Abrasion restiance

● Pressure restiance

● Elastricity

Advantage of rubber lining

● Reliable application

● Accurate lining thickness

● Excellence bonding

● Defect detection

● Able to maintenance