Good morning to all who are reading the thread on needle holes.
Rosaleen and I have traded notes under several topic names, this one
may be more descriptive.
The underlying fabric in silnylon is ripstop. But with the silicone
in it the stuff does not act much like ripstop. It is really strong
for its weight. However, when the edge of silnylon is cut with a
pair of scissors, it does not fray at all. AT ALL!
The holes made by seams I have removed in silnylon look just like
paper perforations... just like tyveck. BTW, the tyveck does look
like it is pressed fiber, like paper. It is not woven. Some tyveck
(like that used in envelopes) has a tendency to separate in one
direction, so I presume the fibers in the mat are oriented mostly in
a direction parallel to those tears.
<>< aka Flyfisher aka geoflyfisher aka Rick aka radiohiker
--- In email@example.com, rosaleen43@a... wrote:
> Hi, "Geoflyfisher,"
> Thanks for the response. I have a couple of comments, inserted
> > From: "geoflyfisher" <geoflyfisher@y...>
> > Subject: Re: Near Disaster! "Autopsy" Results
> > Hi Rosaleen,
> > Great points in your post (pun intended ;) )
> > The hammock material which failed was uncoated ripstop nylon. I
> > using a standard sewing machine needle... not ball point, not
> > cutting needle, just sharp... When I made the bar tack, I had
> > sewn dozens of feet of hook and also loop velcro, which tends to
> > cause burrs on the needle occasionally.
> > I believe that ripstop nylon would be less likely to be weakened
> > sewing than silnylon is. The silicone stablizes the fabric
> > and may allow it to be cut by a needle when regular woven cloth
> > threads would be allowed to be separated by the needle.
> ##### I believe most of the silnylon that I've seen is also
ripstop, but it
> was a finer denier (thinner) than most polyester or nylon ripstops
> seen. I've only done a very little sewing with silnylon, so far.
> don't know whether to expect the fibers to be pushed aside by
either a ball
> point or woven point needle, if it matters at all, or if we really
> finest, cleanest possible holes, or the optimum spacing to further
> further weakening, and hope the silicone will stabilize the fabric
> fraying or other problems. I would rather not find out the hard
> > For this reason, silnylon and tyvek may have some inherent
> > for the weight supporting part of hammock making which the woven
> > ripstop does not.
> ####### I suspect the main concerns here would be the thickness,
> the strength of the materials, and whether or not they have weak
> stitching lines. If the fabric behaves as if it were perforated,
> to sewn , I infer a big problem. I don't know if Tyvek is spun or
> It seems almost pressed, like paper. We all have seen perforated
> what the perforations are for. I think most fabrics fit
either "woven" or
> "knitted." So, I think you are trying to distinguish between
> non-silnylon fabrics. Sport cloth seems to refer to a range of
> nylon fabrics, of varying deniers, coatings or non coatings, etc.,
> local fabric shops. Unfortunately, no one around here seems to
> silnylon, or other materials desirable to the lightweight crowd.
> comes in different deniers, too. I'm pretty sure the body and fly
> Hennessy Asym Ultralight is silnylon. I will have to look closely
to see if
> it is ripstop.
> > I pointed out what I did to allow others to avoid over sewing the
> > velcro at such a vulnerable location. As Ed Speer noted, it is
> > likely the many needle punctures of the material which caused
> > weakness instead of strength.
> > I picked that up before, and think it is a good point to keep in
> > Maybe save bartacks for flexible, stretchable materials like
> > jeans?
> > Cheers,
> > Rosaleen