Описание материалов:
        
            Baydur 684 is a rigid polyurethane structural foam system used in the reaction injection molding (RIM) process. The system is supplied as two reactive liquid components. Component A is a polymeric diphenylmethane diisocyanate (PMDI), and Component B is a formulated polyol system containing no CFC- or HCFC-blowing additives.
The Baydur 684 system is used for applications requiring high compression strength foams,filling cavities and/or producing foam cores for overmolding. As with any product, use of the Baydur 684 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.
        
     
    
    
    | Главная Информация |  | 
|---|
| Используется  |  | 
| Формы  |  | 
| Метод обработки  | - Литье под давлением реакции (обод)
 
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| Твердость | Номинальное значение |  | Метод испытания | 
|---|
| Твердость дюрометра (Shore D, 12.7 mm) | 32 |  | ASTM D2240  | 
| Механические | Номинальное значение | Единица измерения | Метод испытания | 
|---|
| Прочность на растяжение (Break, 12.7 mm) | 3.38 | MPa | ASTM D638  | 
| Флекторный модуль (12.7 mm) | 207 | MPa | ASTM D790  | 
| Flexural Strength (12.7 mm) | 6.03 | MPa | ASTM D790  | 
| Прочность на сжатие (12.7 mm) | 4.00 | MPa | ASTM D695  | 
| Термокомплект | Номинальное значение |  |  | 
|---|
| Компоненты термокомплекта  |  |  |   | 
|     Component a  | Mixing ratio by weight: 130 |  |   | 
|     Component B  | Mixing ratio by weight: 100 |  |   | 
| Дополнительная информация | 
|---|
| Part A
Type: Isocyanate
Specific Gravity @ 25°C: 1.24
Viscosity @25°C: 200 cps
Part B
Type: Polyol
Specific Gravity @ 25°C: 1.08
Viscosity @25°C: 900 cps
Machine Reactivity at 80°F
Cream Time: 16 sec
Gel Time: 55 sec
Tack Free Time: 80 sec
Free Rise Density: 5.6 pcf |