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 11: Auto Rubber Components (Molded)
11.1 Introduction
Molded rubber components for the automotive industry have a very high market potential. These components are used in both original equipment manufacture and replacement markets. They are made from natural and synthetic rubbers. They are made strictly as per the Society of Automotive Engineers or other international specifications. Some formulations are given below. These formulations can be used for industrial molded rubber components such as washers, gaskets, bushes, diaphragms, and stoppers. Formulations for car mats, flaps, and tubes are also given. Since auto rubber components are generally required to conform to physical property requirements, these details are also given along with the formulations.
11.2 Shock Absorber 55 A
| Ingredient | phr |
|---|---|
| 100.00 |
| 5.00 |
| 1.00 |
| 1.25 |
| 40.00 |
| 1.00 |
| 2.50 |
| 0.25 |
| 1.00 |
| Total | 152.00 |
| Note: | |
| Cure for 30 minutes at 141 C. | |
| Tensile strength = 2700 psi; Modulus at 100% elongation = 270 psi; Modulus at 300% elongation = 1200 psi; Ultimate elongation = 500 570%; Rebound resilience (DIN standard) = 50%; Shore hardness = 55 A. |
11.3 Shock Absorber 65 A
| Ingredient | phr |
|---|---|
| 100.00 |
| 5.00 |
| 1.00 |
| 1.50 |
| 30.00 |
| 75.00 |
| 2.00 |
| 1.00 |
| 0.25 |
| 3.00 |
| Total | 218.75 |
| Note: | |
| Cure for 30 minutes at 141 C. | |
| Tensile strength = 1750 psi; Modulus at 100% elongation = 411 psi; Modulus at 300% elongation = 1158 psi; Ultimate elongation = 420%; Rebound resilience = 43%; |
Copyright William Andrew Inc. 2007 under license agreement with Books24x7
