Описание материалов:
Dynalloy™GP 7820-70N is a thermoplastic elasticity mainly developed for the consumer goods market, such as kitchen utensils, toys, personal and infant care products, etc. This series is modified by hydrogenated styrene block copolymer as substrate.
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| Физический | Номинальное значение | Единица измерения | Метод испытания |
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| Удельный вес | 0.978 | g/cm³ | ASTM D792 |
| Твердость | Номинальное значение | Единица измерения | Метод испытания |
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| Твердость дюрометра (Shore A, 10 sec) | 70 | | ASTM D2240 |
| Эластомеры | Номинальное значение | Единица измерения | Метод испытания |
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| Прочность на растяжение (Yield, 23°C) | 7.70 | MPa | ASTM D412 |
| Удлинение при растяжении (Break, 23°C) | 750 | % | ASTM D412 |
| Анализ заполнения | Номинальное значение | Единица измерения | Метод испытания |
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| Видимая вязкость (200°C, 11200 sec^-1) | 7.49 | Pa·s | ASTM D3835 |
| Инъекция | Номинальное значение | Единица измерения | |
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| Рекомендуемый Макс измельчения | 20 | % | |
| Задняя температура | 166 - 188 | °C | |
| Средняя температура | 177 - 193 | °C | |
| Передняя температура | 188 - 227 | °C | |
| Температура сопла | 182 - 216 | °C | |
| Температура обработки (расплава) | 193 - 227 | °C | |
| Температура формы | 16 - 38 | °C | |
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| Color concentrates with polypropylene (PP), ethylene vinyl acetate (EVA), or low density polyethylene (PE) carriers are most suitable for coloring Dynalloy™ 7820. Improved color dispersion can be achieved by using higher melt flow concentrates (with a melt flow from 25 - 40 g/10 min). Typical loadings for color concentrates are 1% to 5% by weight. Concentrates based on PVC should not be used. The final determination of color concentrate suitability should be determined by customer trials.Purge thoroughly before and after use of this product with a low flow (0.5 - 2.5 MFR) polyethylene (PE) or polypropylene (PP).Regrind levels up to 20% can be used with Dynalloy™ GP 7820 with minimal property losses, provided that the regrind is free of contamination. To minimize losses during molding, the melt temperature should be as low as possible. The final determination of regrind effectiveness should be determined by the customer.The Dynalloy™ GP 7820 has excellent melt stability. Maximum residence times may vary, depending on the size of the barrel. Generally, the barrel should be emptied if it is idle for periods of 8 - 10 minutes or longer.Drying is not Required |
