Matronics Email Lists :: View topic - Preheating glass cloth

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Preheating glass cloth

Matronics Email Lists Forum Index -> Europa-List

View previous topic :: View next topic

Author Message

tonyrenshaw268(at)gmail.c
Guest

Posted: Wed May 22, 2013 2:27 pm Post subject: Preheating glass cloth

 	  Quote: 	
		   Hi, I'm laying up here in Sydney in temperatures that have recently turned towards our winter. I'm using West Systems which already does not wet out the cloth as well as the SP Systems, and has a shorter pot life, albeit in warmer weather. I'm preheating the job area, the Lift Pin external reinforcement lay ups, and mixing the resin and hardener under workshop spotlights that generate a lot of localised heat. The glass cloth though is cold, and I am wondering about placing it in foil in the oven to heat it up pre layup. I even thought of microwaving it, when my wife isn't at home. Any thoughts on the wisdom or otherwise of doing this? I want to make the cold cloth as conducive as possible to allow ingress of the resin into the individual fibres of a single thread, as I occasionally have had some small splinter strait ions in these layups that appear to be micro dry areas along certain fibres, but the matrix between them is fully wetted out. Thanks in anticipation.

Regards
	


Tony Renshaw

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

rlborger(at)mac.com
Guest

Posted: Wed May 22, 2013 2:38 pm Post subject: Preheating glass cloth

Tony,



Forget the microwave.  It won't heat glass cloth.  Microwaves heat the water content of items.  No water content to fiberglass cloth.  At least there better not be any water in the cloth.



Blue skies & tailwinds,

Bob Borger

Europa XS Tri, Rotax 914, Airmaster C/S Prop.

Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

3705 Lynchburg Dr.

Corinth, TX  76208-5331

Cel: 817-992-1117

rlborger(at)mac.com



On May 22, 2013, at 5:26 PM, Tony Renshaw <tonyrenshaw268(at)gmail.com> wrote:






 	  Quote: 	
		   Hi, I'm laying up here in Sydney in temperatures that have recently turned towards our winter. I'm using West Systems which already does not wet out the cloth as well as the SP Systems, and has a shorter pot life, albeit in warmer weather. I'm preheating the job area, the Lift Pin external reinforcement lay ups, and mixing the resin and hardener under workshop spotlights that generate a lot of localised heat. The glass cloth though is cold, and I am wondering about placing it in foil in the oven to heat it up pre layup. I even thought of microwaving it, when my wife isn't at home. Any thoughts on the wisdom or otherwise of doing this? I want to make the cold cloth as conducive as possible to allow ingress of the resin into the individual fibres of a single thread, as I occasionally have had some small splinter strait ions in these layups that appear to be micro dry areas along certain fibres, but the matrix between them is fully wetted out. Thanks in anticipation.

Regards
	


Tony Renshaw

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

rparigoris

Joined: 24 Nov 2009
Posts: 797

Posted: Wed May 22, 2013 3:35 pm Post subject: Preheating glass cloth

Hi Tony 

 	Warm up Resin and hardener a little, apply mixed resin to cloth on a plastic sheet, use heat gun to warm up all, then squeegee off excess, warm up target area with heat gun if needed. 

 	You can layup cloth with Redux like this if you are adhering to metal. 

 	When filling with plastic or glass balloons, if you mix really really dry, you can do last pass with a heated spackle type knife after you heat the dry mix and can usually get done what many think are impossible. 

 	Ron Parigoris 

 	  

 	     [quote][b]

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

jrgowing(at)bigpond.net.a
Guest

Posted: Wed May 22, 2013 7:03 pm Post subject: Preheating glass cloth

Tony

IF you can't have a warm immediate work area, you should be able to have a

warm cupboard in which to keep the roll of glass?

Bob Gowing (down near Vic Border)



--

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

nigel_graham(at)m-tecque.
Guest

Posted: Thu May 23, 2013 2:07 am Post subject: Preheating glass cloth

Tony, ideally         you need to         aim to achieve a stable working environment (workshop and         airframe) temperature         of around 25c.      

Both the resin         and the cloth         benefit from storage in warm dry conditions. If the cloth is old         or has been         left in a damp atmosphere, the sizing deteriorates with a result         that it will         not wet-out properly, you will recognise this by the white “dry”         areas within         the filaments of the laminate. That is why the build manual         recommends heating         the cloth storage cabinet with a low wattage light bulb.     

If in any         doubt, buy some         new cloth (and never fold it as the crease will “set”).     

      

Trying to         wet-laminate with         viscous resin is a pain and usually results in heavy         “resin-rich” laminations,         you can warm it to thin it, but this reduces its pot life – also         a pain. Most         of my experience has been with the SP Systems (now Gurit) resin         and I found         that the slower hardener was far less viscous, giving the double         benefit of a         longer working-time and much more satisfying to work with. Check         the West         Systems datasheets to see if less viscous hardeners are         available.     

      

Lastly, if you         need to use         localised heat, do so with care. The gentle warmth from a hair         dryer is fine         but the vicious heat from a hot-air gun or paint-stripper will         almost certainly         destroy or distort the work-piece. At best it can cause         localised exothermic         reactions, which will render the job unusable.     

      

The trick is to         prepare         everything the day before - warm the workshop, lay out         everything you need.         When you've finished, drop the brush into a pot of vinegar (much         cheaper than         Acetone) and just leave everything alone (don't attempt to clean         up - you'll         just spread the goo over everything. Just walk away. The next         day when everything         had dried, you can clean up easily.     

      

Good luck!     

      Nigel

                                   Normal   0      <![endif]-->       

                                   Normal   0      <![endif]-->            On 22/05/2013 23:26, Tony Renshaw       wrote:

     

     [quote]        	  Quote: 	
		  --> Europa-List message posted by: Tony Renshaw <tonyrenshaw268(at)gmail.com> (tonyrenshaw268(at)gmail.com)



          	  Quote: 	
		  Hi, I'm laying up here in Sydney in temperatures that have recently turned towards our winter. I'm using West Systems which already does not wet out the cloth as well as the SP Systems, and has a shorter pot life, albeit in warmer weather. I'm preheating the job area, the Lift Pin external reinforcement lay ups, and mixing the resin and hardener under workshop spotlights that generate a lot of localised heat. The glass cloth though is cold, and I am wondering about placing it in foil in the oven to heat it up pre layup. I even thought of microwaving it, when my wife isn't at home. Any thoughts on the wisdom or otherwise of doing this? I want to make the cold cloth as conducive as possible to allow ingress of the resin into the individual fibres of a single thread, as I occasionally have had some small splinter strait ions in these layups that appear to be micro dry areas along certain fibres, but the matrix between them is fully wetted out. Thanks in anti

 cipatio

n.

	
       Regards

Tony Renshaw



	
     [b]

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Europa-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum