How to combine performance and simplicity for vacuum casting?
Allier performance et simplicité pour la coulée sous vide grâce à la PR7 Séries de Synthene
Synthene offers a simple and practical range to meet all your needs for the realization of rigid parts in vacuum casting. You can find all you need to know in this article: Synthene – Vacuum casting
Based on the technology already proven for the PR700, the PR7 Series offers the great advantage of a single isocyanate for 4 systems with different properties.
With a single isocyanate: Synthene PR7-XX, and a shelf life of 18 months, the PR7 series allows for optimal stock management with adapted packaging: 1kg and 5kg for the different products.
Mixing ratio:
Synthene PR700: vacuum casting resin par excellence. Simulating an ABS, black, with a flexural modulus of 2300Mpa, this resin also offers a very good temperature resistance: 130°C.
Synthene PR777 : Semi-rigid resin similar to HDPE or PP. (1000 Mpa flexural modulus) With an intermediate stiffness, it has a very good impact resistance and a mixing ratio PR777Polyol + PR7XX Iso of 1/1.
Synthene PR740 : Semi-flexible, alternative to the old PR891. Very easy to use, it has a good colorability. With a simple mixing ratio (100/120) it allows to realize parts with a great flexibility, up to the hinge effect.
Synthene PR750 : THE reference high temperature resin (HDT of 150°C) that can be colored. It flows very easily (viscosity of about 1000mPas.s) while remaining slightly flexible (2200Mpa modulus of lesion)
En résumé :
| Products | POLYOL | PR7XX ISO | Viscosity Mpa.s | Module | Contretype | HDT (°C) |
|---|---|---|---|---|---|---|
| Synthene PR740 | 120 | 100 | 1000 | 590 | PEHD/PP | 96 |
| Synthene PR777 | 100 | 100 | 715 | 930 | PEHD/PP | 110 |
| Synthene PR700 | 80 | 100 | 600 | 2300 | ABS | 130 |
| Synthene PR752 | 60 | 100 | 1000 | 2200 | ABS/PEEK | 150 |
The low aggressiveness of these resins makes them ideal for vacuum casting, allowing the production of 30 to 40 parts in a polyaddition silicone mold (RTV 4234-T4).
The very short demolding time allows to increase the production rate of the parts: demolding between 45 and 60min at 70°C.
Health and safety: All Synthene PR7 series products (Synthene PR740, Synthene PR777, Synthene PR700, Synthene PR752) are mercury free, non CMR, and meet the requirements of European Directives: 2011/65/EU (RoHS), 2002/96/EC, 2000/53/EC, 2000/11/EC.
These different products are compatible with the SYNFILL-G Charge. Questions about the Synthene SYNFILL-G ? Find our dedicated article : Synfill-G from Synthene, the new glass fibre filler for reinforcement
Example of compatibility: Synthene PR700 + Synthene SYNFILL-G
Synthene PR-700 : Black resin intended for the production of prototypes or small series. Any need for the production of parts requiring high thermal resistance and/or high mechanical properties.
| Contretype ABS Synthene PR-700 |
+15% SYNFILL G |
+20% SYNFILL G |
+25% SYNFILL G |
|
|---|---|---|---|---|
| Flexion modulus (MPa) | 1700 | 2700 | 3000 | 3400 |
| Maximum flexion stress (MPa) | 70 | 92 | 95 | 105 |
| Viscosity | 600 | 1000 | 110 | 1300 |
| Deflection temperature under load (°C) | 130/B | 118/A | 136/A | 142/A
|
More information
Need more information on Synthene resins and vacuum casting resins, download our Models, Moulding and Prototyping selection guide:
Need information about Synthene, or about vacuum casting and prototyping resins ? Contact our technical department on +33 426 680 680 or fill in our contact form.