Описание материалов:
Baydur 646 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 646 system is used to produce foam cores for composite applications, such as water skis, wake boards, snow boards, and various components for the transportation and marine markets. As with any product, use of the Baydur 646 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.
| Главная Информация | |
|---|
| Используется | - Структурная пена
- Применение корабля
- Применение в автомобильной области
- Спортивные товары
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| Метод обработки | - Литье под давлением реакции (обод)
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| Физический | Номинальное значение | Единица измерения | Метод испытания |
|---|
| Удельный вес | 0.319 | g/cm³ | ASTM D792 |
| Формовочная усадка-
Поток (6.35 mm) | 0.30 - 0.50 | % | ASTM D955 |
| Твердость | Номинальное значение | Единица измерения | Метод испытания |
|---|
| Твердость дюрометра | | | ASTM D2240 |
| Shaw D, 6.35mm | 37 | | ASTM D2240 |
| Shaw D, 12.7mm | 39 | | ASTM D2240 |
| Механические | Номинальное значение | Единица измерения | Метод испытания |
|---|
| Прочность на растяжение | | | ASTM D638 |
| Fracture, 6.35mm | 6.07 | MPa | ASTM D638 |
| Fracture, 12.7mm | 6.21 | MPa | ASTM D638 |
| Удлинение при растяжении | | | ASTM D638 |
| Fracture, 6.35mm | 7.0 | % | ASTM D638 |
| Fracture, 12.7mm | 9.0 | % | ASTM D638 |
| Флекторный модуль | | | ASTM D790 |
| 6.35 mm | 303 | MPa | ASTM D790 |
| 12.7 mm | 248 | MPa | ASTM D790 |
| Flexural Strength | | | ASTM D790 |
| 6.35 mm | 8.27 | MPa | ASTM D790 |
| 12.7 mm | 8.96 | MPa | ASTM D790 |
| Прочность на сжатие | | | ASTM D695 |
| 6.35 mm | 6.07 | MPa | ASTM D695 |
| 12.7 mm | 3.79 | MPa | ASTM D695 |
| Воздействие | Номинальное значение | Единица измерения | Метод испытания |
|---|
| Charpy Unnotched Impact Strength 1 | 5.3 | kJ/m² | Internal method |
| Термокомплект | Номинальное значение | | |
|---|
| Компоненты термокомплекта | | | |
| Component a | Mixing ratio by weight: 110 | | |
| Component B | Mixing ratio by weight: 100 | | |
| Дополнительная информация |
|---|
| Part A
Type: Isocyanate
Appearance: Dark brown to black liquid
Specific Gravity @ 25°C: 1.24
Viscosity @25°C: 200 cps
Flash Point PMCC: 199°C
NCO: 31.5 wt%
Part B
Type: Polyol
Appearance: Amber liquid
Specific Gravity @ 25°C: 1.08
Viscosity @25°C: 1200 cps
Flash Point PMCC: 123°C
Water: 1.05 wt%
Hydroxyl Number: 370 KOH/g
Material Temperatures: 29 to 38°CMold Temperature: 50 to 60°CHand Mix Reactivity at 25°C
Cream Time: 30 to 40 sec
Gel Time: 65 to 75 sec
Tack Free Time: 77 to 85 sec
Free-Rise Density: 5 to 7 lb/ft³
Machine Reactivity at 30°C
Cream Time: 10 to 20 sec
Gel Time: 30 to 40 sec
Tack Free Time: 50 to 60 sec
Free-Rise Density: 5 to 7 lb/ft³
Polyol Nucleation Specific Gravity: 0.8 to 0.9 0Typical cure Time, 0.500 in Thickness: 4 to 5 secMolded Density: 10 to 30 lb/ft³ |
