adhesive for attaching pyester felt to poyypropylene or Mylar

How about thermal or ultrasonic welding?

Masterbond 40

In other words, "super glue"

Donald

Cyanoacrylate ("super glue") breaks down with sustained exposure to water. It also won't tolerate continuous exposure to boiling water or those temperatures.

Another good link - I gave ya a GA 'cause I forgot that one...

Those are very helpful links!

GA back at cha!

I use 3M filters in my helmet breathing system when working in dusty or chemical en-laden environments.

DOW is handy with "Liquidow" deicer excellent for git'r dun time.

Henry is very helpful at sticky time

Thanks

Possibly epoxy? I'm not sure how well it sticks to polypropylene. It should bond well to the felt.

How will trickle down collector stand up to hardness & other contaminants in the water ? Won't it gradually clog up? I presume you want to slow the flow in spite of steep angle to catch the sun? Run tubes across the collector one way with a slight slope to a collector header & cross into an adjacent header for next stage of heating?

I suggest to use Polyester felt to Mylar, then you will have many choices in selecting adhesives----Basically Polyester and Mylar are almost same chemical family and will have better compatibility and heat reistsance than Polypropylene---Mylar has better environmental stability than Polypropylene------So if select Polyester Felt and Mylar combination-------then you can use most Epoxy, Mastebond or rubber modified epoxies--------Refer to 3M adhesive catalog

Are you sure? The adhesive must be transparent or else the sunlight will not pass through it to the black felt matt below. I really must have something that does not hinder (or minimally hinders) the solar energy from getting through.

There is a second option: If the adhesive was Black, it would absorb the energy also and this would be ok too. Does this allow for more adhesive options?

Are you sure? The adhesive must be transparent or else the sunlight will not pass through it to the black felt matt below. I really must have something that does not hinder (or minimally hinders) the solar energy from getting through.--------------------------------------------------------------------------------------------------Yes---If you can use black adhesives that will be great--There are several black epoxy adhesives with high emissivities are available-----------I know Mylar is available in transparent forms--------I also know for sure Mylar is more stable to UV and Ozone than Polypropylene

Excellent Contacts Enviroman--Appreciate it--------Adding Henkel to the list will be great----AKA HYSOL

http://www.henkel.com/cps/rde/xchg/henkel_com/hs.xsl/5497_COE_HTML.htm

This link is for Henkel Adhesives --AKA Loctite, Hysol and other brands

I would be concerned also with potential toxicity of whatever adhesive you are using especially if it is being heated to that temperature and getting in contact with your water.