Darryl Keil Last Activity 2025-05-12 11:03 AM
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Adam

 
Subject : Vinyl vs Poly
Posted : 2006-06-09 11:15 AM
Post #33106
Hello,

I'm considering getting a new vacuum ssytem (upgrading from home built unit) and would like to know the pros and cons of bag materials. I build furniture full time but my volume is low. Will poly be better in the long run?

tks

Adam


 
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Earl

Posts: 75

Joined: 2003-12-04
Location: Pensacola FL

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Subject : RE: Vinyl vs Poly
Posted : 2006-06-09 12:45 PM
Post #33107 - In reply to #33106
Adam,

I have a 30mil poly bag from Darryl that's over 10 yrs old. And it's glued up thousands of ft of veneer, curved and flat. That should give you a little insight to the poly versus vinyl discussion.

Earl


 
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Don Stephan

Posts: 825

Joined: 2003-07-18
Location: Cincinnati, Ohio

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Subject : RE: Vinyl vs Poly
Posted : 2006-06-09 6:58 PM
Post #33108 - In reply to #33107
I purchased a 4'x8' 20 mill vinyl bag July 2003. Having never worked with veneer before I wanted to begin on a budget. I've used it perhaps 100 times in 3 years with no problems, other than one accidental nick with a utility knife and perhaps one pinhole. I'm pretty conscientious to either round over sharp points on the top caul or lay a piece of rubber roofing over them, but a wood carver down the street glued up about 20 pieces without any attention to the sharp corners (the source of the one pinhole?). I do worry about bag damage and would like to have a stronger bag so I wouldn't have to be so attentive, but I'll keep working with my 20 mill as long as it holds up.


 
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Jeff Patrick


Joined: 2004-04-15
Location: Bainbridge Island, WA

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Subject : RE: Vinyl vs Poly
Posted : 2006-06-10 8:34 PM
Post #33113 - In reply to #33106
I have bags of both materials. The vinyl bag is OK and if you are really on a budget it will suffice. However, I enjoy using the poly bags a lot more. Be aware, if you are like me, your first veneer job will not be your last. The process has opened up a whole new world to me. Most of the work I now do are veneer jobs. So, being a full time furniture maker, I would suggest you get the best bag: poly.


 
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Darryl Keil

Posts: 1454

Joined: 2003-05-22
Location: Maine

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Subject : RE: Vinyl vs Poly
Posted : 2006-06-12 12:42 PM
Post #33116 - In reply to #33106
Adam,

There are a number of specific qualities that polyurethane has over vinyl. Polyurethane has superior puncture resistance, excellent memory retention, does not stiffen at lower temperatures, and has no weakness at the seams which is the number one long term problem with vinyl. All vinyl bags over time will begin to tear along the heat weld. Polyurethanes only disadvantage is its significantly higher cost.

Do you need the polyurethane? That really depends on the level of quality you like in your tools and how much you will use it. If you were a 10 person shop with constant use then I would say polyurethane for sure. For home use and one person shops vinyl is usually fine. If you are planning on doing a lot of curved work then I suggest the polyurethane as curved items often put pressure on the seam and with vinyl will make them fail much sooner.

You can also start with a vinyl bag and when it get tired you can then consider a poly bag. If you just want to get one bag that will last for years and years and dont mind the extra cost then get the polyurethane.

Hope this helps along with the other posts.

Sincerely
Darryl Keil
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