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Old 18 August 2013, 11:56   #1
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Chinook C4

I'm refurbishing an old C4... I think that the tubes are hypalon but can anyone confirm?
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Old 18 August 2013, 14:46   #2
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If it's plain smooth fabric when finger rubbing, it's definitely Hypalon. PVC is visibly more tinny dotted or square tiny dotted than Hypalon.

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Old 18 August 2013, 16:08   #3
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Quote:
Originally Posted by Locozodiac View Post
If it's plain smooth fabric when finger rubbing, it's definitely Hypalon. PVC is visibly more tinny dotted or square tiny dotted than Hypalon.

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Eh? I thought PVC was shinier and smoother?
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Old 20 August 2013, 11:37   #4
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Both Hypalon & PVC fabrics are smooth when rubbed, the difference is the fabric texture look.

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Old 21 August 2013, 18:17   #5
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Look at the seams on the tubes. If they are glued - its almost certainly hypalon. If they are welded, it is PVC
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Old 21 August 2013, 19:32   #6
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Our old diving club had a Chinook rib and it was definitely Hypalon as we carried out some repairs on it. The tubes were original and I believe the ribs were all made locally to me (Cheshire) on a farm?? Originally they made SIBs, then progressed to RIBs and even changed some of their earlier SIBs to RIBs or so our DO assured me about 20 years ago!

A while back a Chiorino company rep (they used to make Hypalon fabric) told me that if you hold a flame to an offcut of Hypalon fabric it will char where as other stuff PVC and Polyurethane will melt. (you know I think I will put that to the test tomorrow)
Could make for an interesting write up on an insurance claim form....

Oh and glued seams does not indicate Hypalon
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Old 22 August 2013, 02:57   #7
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Indeed, as far as I'm aware Chinooks were all hypalon.
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Old 22 August 2013, 13:03   #8
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PVC or Hypalon? | Polymarine Paints, Adhesives, Parts & Accessories
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