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Join Date: Feb 2020
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Adhering Vinyl Tubing to PVC and PVC to XLPE Foam

02/14/2020 6:08 AM

Hi. I'm building riverboards which are basically like bodyboards for whitewater, but thicker for more buoyancy and with handles mounted on top so that you don't have to hold on to the underside of the board when going over shallow areas.

With some past prototypes, I used screws through the board with nylon straps as handles, but I'd like to get away from that as I've experienced screws ripping through even with adequate sized washers and even once had an entire small rectangle of the plastic bottom of the board rip through.

Since XLPE foam in 2lb density is a very spongy material, my idea is to insert vinyl handles into short " bells " of PVC pipe on each end. The PVC ends have an outer diameter of 1 1/4" and holes drilled into the foam are 1" diameter. Glue would be applied to both surfaces and the bells forced into the holes which should keep enough tension on the bells while an adhesive cures. Of course, all surfaces are roughly sanded and I would even apply a little bit of gap filler foam into the bottom of the handles to create a flat surface at the bottom for more surface contact. Here's a photo of the handles before being put on.

I know I'm working with some traditionally difficult to bond materials. Does anyone have experience with bonding vinyl tubing to PVC ( I can reinforce this bond with heavy duty drywall screws through the PVC and vinyl as well ) and PVC to cross-linked polyethylene?

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Guru

Join Date: Mar 2007
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#1

Re: Adhering Vinyl Tubing to PVC and PVC to XLPE Foam

02/14/2020 1:21 PM

I would put an HDPE bottom on the board and anchor into that....

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Join Date: Mar 2007
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#2

Re: Adhering Vinyl Tubing to PVC and PVC to XLPE Foam

02/14/2020 4:14 PM
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#3

Re: Adhering Vinyl Tubing to PVC and PVC to XLPE Foam

02/14/2020 8:59 PM

PVC can't be "glued" because it is an inactive "slippery" material. But the holes can be back filled as you suggest. That would fill some of the open cells in the foam holes.

Polyethylene plates on the bottom, screwed into the "bells" may help too.

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#4

Re: Adhering Vinyl Tubing to PVC and PVC to XLPE Foam

02/14/2020 10:52 PM

You might have another answer in the photograph that you posted.

You shoes have straps that are inserted through the soles and held in place by the natural material deformation. There are multiple "T" handles that are used in furniture and appliance packaging that you might copy for yourself. If you are concerned about the handles pulling back through after being fitted, then add a stiffening component after insertion.

If you do it this way, then replacing the handles becomes a simple "field" repair rather than going back to the shop, sanding, cleaning, drying and so on.

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