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Old 10-29-2012, 10:41 AM   #1
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vacuum bonded walls

Is there a difference between vacuum bonded and laminated walls? What are the pros and cons ? A sales person told me vacuum bonded walls will not delam. Thanks for any help you can give.
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Old 10-29-2012, 10:48 AM   #2
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Originally Posted by jeffscuda View Post
Is there a difference between vacuum bonded and laminated walls? What are the pros and cons ? A sales person told me vacuum bonded walls will not delam. Thanks for any help you can give.
Sales people have been known to LIE! Youroo!!
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Old 10-29-2012, 11:00 AM   #3
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i believe both are of the same construction....(ie layered materials)...a vacuum bonded wall has all the layers and glue placed on a table and a vacuum is applied to press the glue and layers together...its a much more uniform process....most of the high end units are built this way...

laminated walls are constructed pretty much the same way, but the layers are pressed together with a roller..this method of pressing the glue and layers together is much less accurate than vacuum bonding....

with that said, BOTH methods are subject to delam.....BUT the vacuum bonded walls have a MUCH LOWER rate of failure as compared to the lamination process....

im pretty sure im correct, but if not hopefully someone will chime in....
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Old 10-29-2012, 11:16 AM   #4
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ironj hit it riight on the head.

I would add that for most manufacturers, they may not use the same process for all walls. For example, many who claim vacuum bonded walls are referring to the side walls only, the rear and front caps are probably a different method as well.

For example, my Coachmen was vacu-bond side walls, fiberglass front cap, and laminated rear wall. The rear wall was delivered with a bubble in it, which Coachmen is taking a wait and see approach. They warranty both the bonded and rolled rolls the same, 2 years to see if my bubble grows...
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Old 10-29-2012, 07:54 PM   #5
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Rockwood and other forest river manufactures advertise fully 6 sided vacuum-bonded trailers. This includes floor and roof, is this a good thing?
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Old 10-29-2012, 08:45 PM   #6
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Here it is, straight from a manufacturer "ad" Not sure how pressure applied is "Vacuum". They all fail if not cared for properly.

Vacuum Lamination
ComposiTek composites are vacuum laminated onto a structural frame of double-welded aluminum. This vacuum-lamination process creates one-piece, seamless, rigid walls, floors and roof for less flex and sway down the road. ComposiTek construction results in a stronger, stiffer trailer with the durability and weight distribution only found in monocoque aeronautical engineering.

In the vacuum bonding process the entire structure is placed in a giant vacuum bag and pressurized to approximately 129 pounds per square inch. The wall remains in the bag, under pressure, for 20 to 40 minutes to allow the resins and adhesives to become one piece. This process uses more advanced technology that is significantly more expensive than conventional pinch rolling, but the result is the finest construction available in the RV industry today.

Lesser manufacturers claim “laminated” or “bonded” construction, but unless it is “vacuum bonded” it is probably “pinch-rolled laminated”—an inferior process where the wall goes through two large rollers squeezing the glue as it “pinches” the pieces together. The vacuum process allows for even pressure at a high pounds per square inch rate over a much longer period of time for a superior bonded seal.
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