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Old 10-25-2011   #1
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Question Does polyester fiberglass resin stick to PVC?

Does polyester fiberglass resin stick to PVC?

Rather than stapling low temp plastic to MDF I have this idea to make stepped driver cups on my lathe out of a solid piece of a composite material (like PVC or Dlerin let's say) for a perfect fit. However I don't know what material other than wood the resin bond to?
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Old 10-26-2011   #2
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Default Re: Does polyester fiberglass resin stick to PVC?

Hmmm after some more searching it appears fiberglass will not bond to plastic...well. I can't understand why I see people using PVC for tweeter cups in pillars? Are they asking for problems with cracking and separation down the road? And at the same time stretching fabric onto the same pillars to form them with the cups.

Can someone enlighten me?
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Old 10-26-2011   #3
 
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From what most people say, epoxy resin will stick much better to plastics. I haven't had a chance to try it myself yet but plan to in the spring.

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Here is the one I've heard a few people talk about that works really well http://www.uscomposites.com/epoxy.html

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Old 10-26-2011   #5
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Default Re: Does polyester fiberglass resin stick to PVC?

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Originally Posted by Mirage_Man View Post
Hmmm after some more searching it appears fiberglass will not bond to plastic...well. I can't understand why I see people using PVC for tweeter cups in pillars? Are they asking for problems with cracking and separation down the road? And at the same time stretching fabric onto the same pillars to form them with the cups.

Can someone enlighten me?
polyester will stick relatively well to pvc, with proper preparation, but not delrin(nylon)...it just wont .

scuff the pvc, drill tiny holes(extreme adhesion applications) and wipe down the surface with a rag with acetone on it.

hope this helps

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Old 10-26-2011   #6
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Default Re: Does polyester fiberglass resin stick to PVC?

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Originally Posted by amitaF View Post
polyester will stick relatively well to pvc, with proper preparation, but not delrin(nylon)...it just wont .

scuff the pvc, drill tiny holes(extreme adhesion applications) and wipe down the surface with a rag with acetone on it.

hope this helps
thats the key. lots of prep. scuff with 36 grit like crazy. actually dont scuff it, sand the crap out of it so it has something to bond to.
then drill small anchor holes so the resin can seep through and dry and create an anchor in the material.

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Old 10-26-2011   #7
 
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Default Re: Does polyester fiberglass resin stick to PVC?

Right on! Thanks for the info!
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Old 10-26-2011   #8
 
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Default Re: Does polyester fiberglass resin stick to PVC?

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Originally Posted by Mic10is View Post
thats the key. lots of prep. scuff with 36 grit like crazy. actually dont scuff it, sand the crap out of it so it has something to bond to.
then drill small anchor holes so the resin can seep through and dry and create an anchor in the material.
A bunch of 1/8th inch holes, not all the way through mind you, will really help it bite. I've had best luck drilling the holes randomly from all angles so you get a cross bite lock down on the pvc pipe and there is no way its coming loose period. Strength in angles!

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Old 10-26-2011   #9
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Default Re: Does polyester fiberglass resin stick to PVC?

Clean it BEFORE you sand it. Very important! Otherwise you will just grind all of the oils and mold release agents into the plastic. Acetone will work but keep in mind that it will eat away at some plastics. Denatured alcohol works well too. One other thing, stay away from a product called Bulldog plastic adhesion promotor. This stuff sucks in my opinion. I've had problems with it as well as another friend on mine on here. Drilling the holes that was suggested earlier in this thread is definately a good idea. That will help a lot.

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Old 10-26-2011   #10
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Default Re: Does polyester fiberglass resin stick to PVC?



Acetone, actually makes the surface of pvc dull and slightly porous. as long as the part isn't soaked, the solvent will evaporate before softening up the part.

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