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Posted

Hi I’m having trouble with my nylon straps breaking on the backpacks I made. It seems like the strap just shreads  from where it joins the main part of the backpack. I’m not using a leather needle on it. Does anyone have any suggestions on what to do, it’s not making me want to finish?

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Posted

Put a thin layer of leather over the nylon like some people do when making a guitar strap and they put a leather end on them.

products-Distressed_Canvas.jpg

Every day you learn something is a good day. If you don't learn something every day, was it worth waking up for?

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Posted

It’s just a simple backpack for my 9 year old grandson and it happened on the one from when he was 5 or 6 too. I want to make one for myself and figure out what the problem is and how to avoid it.

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Posted

I've had no trouble with these types of straps.  Possibly your strap material is too thin, or poor quality.  It looks like maybe the strap was nicked by a sharp item and started to unravel.

I had straps on bags that were used to hold electronic vibration monitoring instruments and were used all day long in a dirty and challenging environment.  No breakage of the plastic hardware or the straps.  When the bag (fabric - canvas like exterior, padding, and a silky smooth lining) got dirty enough, I threw them in the washing machine to clean them up a little.  So with all the abuse they suffered, I had no failures.

Tom

Posted

Kids generally tend too be tough on stuff. When I have seen fraying that results in shedding like that either the nylon is being constantly rubbed / nicked against something, the nylon is less then good quality or to many stitches per inch in the stitch used to attach the material. I would suggest reducing your number of stitches per inch and or using a different type nylon that would be stiffer but more abrasive resistant. If the stitches are to close together the stitch will basically cut the fibres of the material.

kgg

Juki DNU - 1541S, Juki DU - 1181N, Singer 29K - 71(1949), Chinese Patcher (Tinkers Delight), Warlock TSC-441, Techsew 2750 Pro, Consew DCS-S4 Skiver

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Posted

I’ve used this same strapping before too but it didn’t hold up well last time and this time I had to replace the handle on top also as it had begun its fraying from the edges to. Last time I thought I forgot to change out my leather needle so I know for sure I did it this time. Maybe stitch length I’ll lengthen it. I’ve mad quite a few leashes and collars with this nylon before too. Going out of town so I thought I’d throw one of these together for myself and I don’t need it to break. This was the 2nd day he used it. Other than the straps which I replace years ago it held up well. This one I used sunbrella and I waxes the canvas.

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Posted

2 things to try, if you haven't already.

1) Burn the ends of the nylon strap after you cut them.
2) Use a fairly long stitch.. 6-8 SPI or so. Make a couple of rows or better a square box with a "X" from corner to corner on.
Tom

Posted

Since you are using sunbrella and canvas have to tried to make your own straps out of those materials? You have all the necessary strap connections and probably scrap / leftover material.

kgg

Juki DNU - 1541S, Juki DU - 1181N, Singer 29K - 71(1949), Chinese Patcher (Tinkers Delight), Warlock TSC-441, Techsew 2750 Pro, Consew DCS-S4 Skiver

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