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 | |
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Используется | |
Формы | |
Метод обработки | - Литье под давлением реакции (обод)
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Твердость | Номинальное значение | | Метод испытания |
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Твердость дюрометра (Shore D, 12.7 mm) | 55 | | ASTM D2240 |
Механические | Номинальное значение | Единица измерения | Метод испытания |
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Прочность на растяжение (Break, 12.7 mm) | 9.17 | MPa | ASTM D638 |
Флекторный модуль (12.7 mm) | 595 | MPa | ASTM D790 |
Flexural Strength (12.7 mm) | 18.6 | MPa | ASTM D790 |
Прочность на сжатие (12.7 mm) | 14.0 | MPa | ASTM D695 |
Термокомплект | Номинальное значение | | |
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Компоненты термокомплекта | | | |
Component a | Mixing ratio by weight: 130 | | |
Component B | Mixing ratio by weight: 100 | | |
Дополнительная информация |
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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 |