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TWO NEW HIGH TEMPERATURE, LARGE-SCALE RENLAM® SYSTEMS FROM RENSHAPE® SOLUTIONS
23 December 2004 - SSAB Oxelosund
| Two new RenLam® liquid laminating systems designed specifically for large structures have been launched by RenShape Solutions. |
Based on the epoxy resin RenLam LY 113 and used with either the standard speed
HY 97-1 or the slower speed HY 98-1 hardeners, this first new low viscosity resin system is 120ºC resistant and suitable for hand lay-up and infusion.
It needs only a room temperature cure to produce strong, stable structures that are ready to be demoulded. It is particularly suitable for large structures where the low viscosity and long pot life give plenty of time for the infusion or hand laminating process to be completed.
Ren HY 97-1 has a pot life of 80minutes and Ren HY 98-1, a pot life of 190minutes.
The facility to demould after only a room temperature cure means that the pattern or mould onto which the system is formed need not be heated and in consequence any CTE difference between the laminated structure and the material it is formed against is eliminated, giving improved dimensional accuracy. The demoulded structure can then be progressively heat post-cured to enhance heat resistance and physical properties.
The second new hand laminating system has been developed from epoxy resin RenLam LY 5210 and can be used in conjunction with a range of hardeners and matched with gelcoat, RenGel® 5200. It is designed for making super-large structures such as wind blade moulds.
Resistant to 200ºC, this system carries low risk toxicity compared to previously available high heat materials and is easy to handle with good application characteristics.
The range of hardeners allows open times from 24 to 240hours depending on the grade chosen. For example, the slowest is HY 5210, with HY 5211 providing intermediate speed and HY 5212 being the fastest. Long periods of exposure to the atmosphere while the systems are being used have no detrimental affect on interlayer adhesion and demoulding is possible after pre-curing at 60ºC. Following this, progressive post curing can be done to maximise the thermal and physical properties from these systems.
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