I just purchased some epoxy resin and it is way too thick, even after heating it, it should be fine for hand lay ups but I 'm still looking for something suitable for infusing. What is the viscosity range that I should be looking for? Any recommendations?
almost 130’s.
thats pretty low I have never even seen that! where can I get it, lowest I have found is about 300
Here you go i know its UK based and where i get mine from, but youll get it in the States. For an idea look in the products section, top part of page in the stickys
RS-L135i Epoxy Infusion System
This product is an ultra low viscosity lamination system formulated for use in the manufacture of composite components from glass, carbon and aramid fibres. The system is suitable for components requiring high static and fatigue strength properties using injection moulding (e.g. RTM), vacuum infusion (e.g. SCRIMP) and pultrusion processes. At 25°C the mixed viscosity is approximately 200mPas and may be lowered further to a value of 100 – 150 mPas by warming the resin, enabling complicated parts with long flow paths can be injected without difficulty. With a mould temperature of around 30°C, the temperature rise with hardener RS-H137i remains very slight, allowing thicker parts to be built at elevated temperatures. There are 2 hardeners varying in reactivity, with pot lives from 20-30 minutes up to 4 hours. The individual hardeners can be inter-mixed in any ratio, enabling users to optimise the pot life of the system to meet their individual requirements. Cured parts can be worked and demoulded after curing at room temperature. Due to the low vapour pressure of the raw materials, this system can be processed at elevated temperatures (80-100°C) using vacuum processes for example, vacuum assisted RTM and SCRIMP. However the maximum temperature will depend on the layer thickness and the geometry of the component part.
Adding an internal parting agent, e.g. zinc stearate, has proven useful for pultrusion processes where profiles with good surface finishes have been produced. Depending on the profile geometry, mould temperatures in the range of 180 – 230°C are possible, thus permitting higher drawing speeds.
The resin and hardeners in this system contain neither solvents nor fillers. Careful selection of raw materials has ensured this system is low in odour and has good physiological properties, minimising skin irritation and allergy problems. However, the appropriate safety advice regarding contact with, and processing of, epoxy resin systems should be followed.
Cure Temperature: 20 – 25°C
Tg (DSc) @ 80°C (max): 90°C
Elongation: 5.0 – 6.5%
Low moisture absorption: 0.20 – 0.50%
Good info thanks, I will look at that.
anyone have thoughts on the kinetix r118 http://www.atlcomposites.com/products/resin%20infusion/index.htm#
, revchem is supposed to be a distributor, but how do I go about finding this item? The revchem site is not very catering to online purchasing.
I don’t know how many hours I’ve jsut spent on google trying to find a suitable resin for infusion and have come up with nothing, anyone have any recommendations? What are you using? Thanks.
http://www3.gurit.com/marine/products_infusion.php
I´m going to try prime 20 after I get something infused right with PER.
Ive been using Adtech 820 epoxy resin with the 823 Hardner. Its CPS is in the 350’s.
Ive had no problems so far and thats infusing through 8 layers of 8.8oz satin weave E-Glass. Including extra thickness in areas that I had to overlap.
Baz: Whats the set time on that resin your using? Do you know the coversion from mpas to cps? Couldnt find one.
The Adtech stuff seems to produce a small amount of visible gas that builds up between the flow medium. Only thing Im not happy with.
does that cause voids in the laminate?
200mPas is the same as 200cP
No. Just very small air bubbles between the mesh. Im not positive that thats what it is. It may be reacting to the spray glue. Or the tape Im using for string bleeding.
Where did you get the adtech 820/823 resin?
JRL, the set time is variable, i change it by mixing the two hardeners depending on what i`m producing and the ambient temperature. So it can start to set anything from 30 mins to 4 hours.
Baz
JRL, Where did you get the adtech 820/823 resin?
GE polymershapes. Not sure if they have a website.
You can also order directly from CASS polymers.
By the way it wasnt gas that was causing the air. I over lapped my flow medium in the thickest area of the part. That caused the resin to flow to quickly over that area and it ended up leaving small amounts of air on the surface. I removed the overlap on the most recent part I made and the bubbles are gone. I also shortend the flow medium on the outer edges of the part to slow the resin down a bit. One of those duh moments.
thanks JRL