Natural soft rubber (NSR)

Characteristics of Natural Soft Rubber (NSR)

Natural Soft
Weather
Heat
Low Temperature
Acid
Alkali
Abrasion
Vapor Permeability
Shock

 


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

Concentration Natural Soft Rubber

R-6

RT 90°C
Sulfuric Acid H2SO4 10 O X
Sulfuric Acid H2SO4 30  O X
Sulfuric Acid H2SO4 50 O  X
Sulfuric Acid H2SO4 70 X X
Hydrochloric Acid HCl 10 O  X
Hydrochloric Acid HCl 35 O  X
Nitric Acid HNO3 1 X  X
Sulfurous Acid H2SO3 0.5 X  X
Phosphoric Acid H3PO4  O  O
Hydrofluoric Acid HF 1 X  X
Hydrofluoric Acid HF 48  X  X
Carbonic Acid H2CO3  O
Chlorine Water Cl2 satu  X  X
Chlorine Gas Cl2 wet  X   X
Hydrobromic Acid HBr 40 O   X
Hydrogen Sulfid Water H2S  O
Chromic Acid H2CrO4 1 X   X

   O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Inorganic Alkalis

Chemical Formula Conc. (%) Natural Soft Rubber

R-6

RT 90°C
Caustic Soda NaOH 48 O O
Caustic Potash KOH 25 O O
Aqua Ammonia NH4OH 28  X

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Inorganic Salts Solutions

Chemical Formula Conc (%) Natural Soft Rubber

R-6

RT 90°C
Sodium Hypochlorite NaClO  X  X
Calcium Hypochlorite Ca(ClO)2  ∆  X
Sodium Chlorate NaClO3  O  ∆
Potassium Chlorate KClO3 O  ∆
Sodium Chloride NaCl O  ∆
Calcium Chloride CaCl2  O  ∆
Zinc Chloride ZnCl2  O  ∆
Ammonium Chloride NH4Cl O  ∆
Sodium Sulfate Na2SO4  O  ∆
Sodium Bicarbonate NaHCO3 O  ∆
Potassium Bichromate K2Cr2O7 O  ∆
Sodium Sulfite Na2SO3  O  ∆
Potassium Sulfite K2SO3  O  ∆
Sodium Sulfide Na2S O  ∆
Potassium Sulfide K2S  O  ∆
Sodium Thiosulfate Na2S2O3  O
Sodium Phosphate∆ Na3PO4  O  ∆
Potassium Chloride KCl  O  ∆
Ammonium Carbonate (NH4)2CO3  O  ∆
Ferric Chloride FeCl3  O  ∆
Ammonium Sulfate (NH4)2SO4  O  ∆
Stannous Chloride SnCl2  O  ∆
Chromium Chloride CrCl2  O  ∆
Nickel Sulfate NiSO4  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 (%) Natural Soft Rubber

R-6

RT 90°C
Acetic Acid CH3COOH 10 X X
Glacial Acetic Acid CH3COOH 10
Formic Acid HCOOH 90 O  X
Oxalic Acid (COOH)2 20 O
Butyric Acid CH3CH2CH2COOH 100  X X
Tartaric Acid (CH OH COOH)2 50 O X
Lactic Acid CH3CH(OH)COOH 25

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Organic Compounds

Chemical Formula Conc (%) Natural Soft Rubber

R-6

RT 90°C
Acetone CH3COCH3  ∆  X
Methanol CH3OH O  X
Ethanol C2H5OH O  X
n-Propylalcohol C3H7OH O  X
n-Butanol C4H9OH
Formaldehyde HCHO O  X
Glycerin C3H5(OH)3  O
Ethylene Glycol (CH2OH)2  O
Triethanolamine N(CH2CH2OH)3 O  ∆
Glucose C6H12O6  O  ∆

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Description

Natural Soft Rubber (NSR)

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 Soft Rubber (NSR)

Application good for acid, alkali and abrasion resistance 

OHJI Material

Characteristics

General Application

Curing Method

Hardness

Autoclave

Open steam

OHJI R-4

Used in the case of extreme slurry abrasion where R -6 is not sufficient.For abrasion resistance of slurry

42 ± 7

Type A

OHJI R-5

Inadequate for slurry abrasion, but applicable for abrasion with large diameter of coarse particle and high loading.For special abrasion resistance

62 ± 7

Type A

OHJI R-6

(R-16)

Standard grade of natural soft rubber for acid resistance.

Alkali-resistance and slurry abrasion resistance shall be separately considered.

Storage and piping for chemical resistance

Suitable for caustic soda

62 ± 7

Type A

OHJI R-7

(R-17)

Inadequate for general acid and alkali resistance.

Used for surface application of single or on hard rubber.

Hydrofluoric acid resistance (Only a little amount in phosphoric acid)

67 ± 7

Type A

OHJI R-8

(R-18)

Soft rubber blended with hard rubber for vulcanization.

Used as SH type

(SH-8168, SH-8078, SH-78)

70 ± 7

Type A

OHJI R-8I

Compound of low Ca and MgSame as R-6 and R-8

42 ± 7

Type  A

 * With regard to service condition, in the case of food-related, R-6 and (R-16) is 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

● Chemical resistance

● Shocket restiance

● Abrasion restiance 

● Pressure restiance

● Elastricity

Advantage 

● Reliable application

● Accurate lining thickness

● Excellence bonding

● Defect detection

● Able to maintenance

Characteristics of Natural Soft Rubber (NSR)

Natural Soft
Weather
Heat
Low Temperature
Acid
Alkali
Abrasion
Vapor Permeability
Shock

 


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

Concentration Natural Soft Rubber

R-6

RT 90°C
Sulfuric Acid H2SO4 10 O X
Sulfuric Acid H2SO4 30  O X
Sulfuric Acid H2SO4 50 O  X
Sulfuric Acid H2SO4 70 X X
Hydrochloric Acid HCl 10 O  X
Hydrochloric Acid HCl 35 O  X
Nitric Acid HNO3 1 X  X
Sulfurous Acid H2SO3 0.5 X  X
Phosphoric Acid H3PO4  O  O
Hydrofluoric Acid HF 1 X  X
Hydrofluoric Acid HF 48  X  X
Carbonic Acid H2CO3  O
Chlorine Water Cl2 satu  X  X
Chlorine Gas Cl2 wet  X   X
Hydrobromic Acid HBr 40 O   X
Hydrogen Sulfid Water H2S  O
Chromic Acid H2CrO4 1 X   X

   O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Inorganic Alkalis

Chemical Formula Conc. (%) Natural Soft Rubber

R-6

RT 90°C
Caustic Soda NaOH 48 O O
Caustic Potash KOH 25 O O
Aqua Ammonia NH4OH 28  X

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Inorganic Salts Solutions

Chemical Formula Conc (%) Natural Soft Rubber

R-6

RT 90°C
Sodium Hypochlorite NaClO  X  X
Calcium Hypochlorite Ca(ClO)2  ∆  X
Sodium Chlorate NaClO3  O  ∆
Potassium Chlorate KClO3 O  ∆
Sodium Chloride NaCl O  ∆
Calcium Chloride CaCl2  O  ∆
Zinc Chloride ZnCl2  O  ∆
Ammonium Chloride NH4Cl O  ∆
Sodium Sulfate Na2SO4  O  ∆
Sodium Bicarbonate NaHCO3 O  ∆
Potassium Bichromate K2Cr2O7 O  ∆
Sodium Sulfite Na2SO3  O  ∆
Potassium Sulfite K2SO3  O  ∆
Sodium Sulfide Na2S O  ∆
Potassium Sulfide K2S  O  ∆
Sodium Thiosulfate Na2S2O3  O
Sodium Phosphate∆ Na3PO4  O  ∆
Potassium Chloride KCl  O  ∆
Ammonium Carbonate (NH4)2CO3  O  ∆
Ferric Chloride FeCl3  O  ∆
Ammonium Sulfate (NH4)2SO4  O  ∆
Stannous Chloride SnCl2  O  ∆
Chromium Chloride CrCl2  O  ∆
Nickel Sulfate NiSO4  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 (%) Natural Soft Rubber

R-6

RT 90°C
Acetic Acid CH3COOH 10 X X
Glacial Acetic Acid CH3COOH 10
Formic Acid HCOOH 90 O  X
Oxalic Acid (COOH)2 20 O
Butyric Acid CH3CH2CH2COOH 100  X X
Tartaric Acid (CH OH COOH)2 50 O X
Lactic Acid CH3CH(OH)COOH 25

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Organic Compounds

Chemical Formula Conc (%) Natural Soft Rubber

R-6

RT 90°C
Acetone CH3COCH3  ∆  X
Methanol CH3OH O  X
Ethanol C2H5OH O  X
n-Propylalcohol C3H7OH O  X
n-Butanol C4H9OH
Formaldehyde HCHO O  X
Glycerin C3H5(OH)3  O
Ethylene Glycol (CH2OH)2  O
Triethanolamine N(CH2CH2OH)3 O  ∆
Glucose C6H12O6  O  ∆

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

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