| 摘要 |
THE PRESENT INVENTION DISCLOSES A PROCESS FOR PREPARING A THERMOPLASTIC RUBBER ( TPR ) FILM AND A TPR LEATHER OF A LAMINATED TPR FILM AND CLOTH. IN PARTICULAR THE PRESENT INVENTION IS DIRECTED TO A CALENDERING PROCESS FOR PREPARING THE TPR FILM AND TPR LEATHER BY FORMULATING A SUITABLE TPR COMPOSITION AND CHOOSING SUITABLE OPERATING CONDITIONS FOR THE CALENDERING PROCESS. A SUITABLE TPR FOR USE IN THE PRESENT INVENTION INCLUDES THE TPR WHICH HAS A MELT INDEX ( 180 °C ) > 1. THE TPR ALONE OR BLENDED WITH ANOTHER RESIN IS CALENDERED, TO WHICH A LUBRICANT SUCH AS ZINC STEARATE AND POLYETHYLENE WAX OPTIONALLY AN ANTI - OXIDATION AGENT, AND AN UV ABSORBER ARE ADDED. A TPR COMPOSITION CALENDERED BY AN INVERTED L - SHAPED CALENDER COMPOSED OF FOUR CALENDER ROLLS AT A TEMPERATURE OF 120 - 170 °C HAS A MELTING VISCOSITY RANGING FROM 20000 - 80000 POISES.
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