Essential Rubber Formulary: Formulas for Practitioners
Authored by a seasoned rubber technologist of four decades, this book gives practical information on compounding techniques, coloring, ingredients, as well as typical rubber testing methods.
TABLE OF CONTENTS Essential Rubber Formulary: Formulas for Practitioners
Chapter 16: Paddy Dehusking Rolls
16.1 Formulation Based on Natural Rubber
| Ingredient | phr |
|---|---|
| 70.00 |
| 30.00 |
| 5.00 |
| 1.00 |
| 90.00 |
| 1.00 |
| 5.00 |
| 1.00 |
| 1.50 |
| 0.50 |
| 3.00 |
| 0.50 |
| Total | 208.50 |
| Note: | |
| Cure for 30 45 minutes in a press at 150 C. Curing can also be done in an autoclave by wrapping with wet nylon cloth. | |
| Specific gravity = 1.15; Wallace plasticity = 25; Mooney scorch time (MS 1+3) at 120 C = 10 minutes; Tensile strength = 200 kg/cm 2; Ultimate elongation = 700%; Modulus at 300% elongation = 55 kg/cm 2; Shore hardness = 80 A. |
16.2 Formulation Based on Carboxylated Nitrile Rubber
| Ingredient | phr |
|---|---|
| 85.00 |
| 15.00 |
| 1.50 |
| 1.00 |
| 3.00 |
| 100.00 |
| 20.00 |
| 15.00 |
| 2.00 |
| 0.50 |
| Total | 243.00 |
| Note: | |
| Cure for 30 minutes at 150 C. Curing can also be done in an autoclave by wrapping with wet nylon cloth. | |
| Wallace plasticity = 48; Mooney scorch time (MS 1+3) at 120 C = 10 minutes; Tensile strength = 140 kg/cm 2; Ultimate elongation = 490%; Modulus at 100% elongation = 36 kg/cm 2; Shore hardness = 80 A. |
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