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Forum > Sewing Machines > Help buying a needle ( Moderated by Sharon1952, EleanorSews)

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Help buying a needle
dinka
dinka
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Member since 1/6/14
Posts: 4
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Date: 1/6/14 4:15 PM

Hi,

I'm trying to sew this material, called Tyvek. Here are some instructions I've got from their data sheet, which I'm having difficulties figuring out, in the sense of what should I ask forlook for when buying a needle and a thread.

Here is the description of what I need:
• Use #306 (Union Special) or #14 (Singer) needle, or equivalent.
• Use a flat tipped needle that cuts slit-like perforations. “Rock Point” (Union Special) or “Narrow Wedge”
(Singer) will permit top speed operation with the same thread used for round-point needles.
• The informal industry standard of 25/4 tex (24/4cc) glace thread of short staple cotton in #14 and #036
needles have given satisfactory performance in outdoor banners when coupled with 16.5/3 tex (36/6cc)
soft looper thread. If smaller diameter thread is required, 14.5/4 tex (40/4cc) glace thread of “Sak” quality
should provide satisfactory results.

Maybe somebody has a more precise idea what this means or can spell it out for me...?

Thank you,
Dina

beauturbo
beauturbo
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In reply to dinka <<


Date: 1/6/14 6:35 PM

If you are using a home sewing machine and so need or want to use a flat backed normal home sewing machine needle and really want to do it as "they" say to, in whatever you got that from and go with the thing of:
• Use a flat tipped needle that cuts slit-like perforations. “Rock Point” (Union Special) or “Narrow Wedge” like that, I think you are down to using more a made for leather needle, size 14 instead.

Just because no home sewing machine needles have any kind of flat tips on them at all. Most are pointed and round instead. Some might make more a slit like hole in your fabric instead of just a round hole though, and the only two kinds of those that I can think of, that would even do that, I think are a Wing needle with little metal pieces on the sides of it (used for more heirloom sewing most of the time to leave holes in the fabric) or just a made for leather needle that might have a twist to it and might cut more of a slit. You could try both of those.

You could also just use any kind of needle to see what happened. Just because some special commercial machine someplace uses all that stuff to sew through some really thick Tyvek for some special application best some place and with commercial needles and thread, does not mean you could not sew though it with any home sewing needle either, particular if it was really just the really thin stuff, that sometimes they put in with advertising promotions you get in the mail as advertisement for things and such.
-- Edited on 1/6/14 6:38 PM --

CdnSkier
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In reply to dinka <<
thumbsup 1 member likes this.


Date: 1/6/14 9:51 PM

I would use a 90/14 Leather needle as it is designed to cut, not pierce, fabric. Also I would use a poly top-stitching thread, or if your project is destined for outside use, go to Joann's or Hancocks in the Home Dec section and purchase thread designed for outdoor use. This is treated to resist water and UV damage.

------
Baby Lock Ellure Plus (BLR3), Pfaff Creative 4874 serger/coverstitch, Singer Rocketeer 500J, Singer 301A short-bed

"A woman is like a tea bag- you never know how strong she is until she gets in hot water." Eleanor Roosevelt

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dinka
dinka
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In reply to CdnSkier <<


Date: 1/6/14 10:15 PM

Thank you for your answer! What is a poly top-stitching thread?

dinka
dinka
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In reply to beauturbo <<


Date: 1/6/14 10:16 PM

Thx a lot!

RipStitcher
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Date: 1/6/14 10:37 PM

Inquiring minds wanna know....

What are you building?

------
~~~YAY! ~~~ I finally published my first pattern!
See demo video on: www.BionicGearBag.com
My personal blog: www.RipStitcher.com

Wish list:
Bernina 550QE (for it's cute little footprint)
Sashiko
Ovation serger


Love my Babylock Ellisimo Gold & ElnaPress

dscheidt

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Date: 1/7/14 0:18 AM

I've sewn tyvek, of the weight used for mailing envelopes, using a plain pointed needle (a sharp, for a home machine) of the size suitable for the thread I was using, which was probably a spun poly, of tex 30 or 40. so a 12 or 14 needle.
You'll want to use somewhat longer sttitch length than you normally would. It can tear along the seam lines.

It's also possible to glue or tape tyvek.

dinka
dinka
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In reply to RipStitcher <<
thumbsup 1 member likes this.


Date: 1/7/14 1:10 PM

Picture
-- Edited on 1/7/14 1:11 PM --

Changma
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In reply to dinka <<


Date: 1/7/14 1:16 PM

Wow!

PattiAnnJ
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In reply to dinka <<


Date: 1/7/14 1:22 PM

Quote: dinka
Hi,



I'm trying to sew this material, called Tyvek. Here are some instructions I've got from their data sheet, which I'm having difficulties figuring out, in the sense of what should I ask forlook for when buying a needle and a thread.



Here is the description of what I need:

• Use #306 (Union Special) or #14 (Singer) needle, or equivalent.

• Use a flat tipped needle that cuts slit-like perforations. “Rock Point” (Union Special) or “Narrow Wedge”

(Singer) will permit top speed operation with the same thread used for round-point needles.

• The informal industry standard of 25/4 tex (24/4cc) glace thread of short staple cotton in #14 and #036

needles have given satisfactory performance in outdoor banners when coupled with 16.5/3 tex (36/6cc)

soft looper thread. If smaller diameter thread is required, 14.5/4 tex (40/4cc) glace thread of “Sak” quality

should provide satisfactory results.



Maybe somebody has a more precise idea what this means or can spell it out for me...?



Thank you,

Dina

This sounds like a subject for the parachute man, Al Johnson to address.

When I googled Tyvek I found igloos and tents.

------
"Improvise, adapt and overcome." - Clint Eastwood/Heartbreak Ridge

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