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Old 03-16-2001, 03:48 PM   #1
slidewaysmike
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I have LDPE that I am going to mount this weekend, I don't think they are that flexible though that they will flap in the wind. I will let you know and post some pictures.

Mike
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Old 03-16-2001, 04:06 PM   #2
beachbum
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Mike,
So LDPE is somewhat flexible? That's good, I want something that will bend rather than break if hit. If you could, can you take some pics that would show the material being bent? That would help me a lot! Thanks,

Josh
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Old 03-16-2001, 04:33 PM   #3
slidewaysmike
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No problemo, I will post the pictures of them once I have them on.

And yes, they are somewhat flexible. I think the only thing to worry about as far as flex goes, is the ambient temperature. I suppose if it is really cold, they would lose some of there ability to flex.

Mike
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Old 03-16-2001, 04:42 PM   #4
Ginseng
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LDPE is cheap and fairly stiff if used in a sufficient thickness to protect (40-120 mils). HDPE would be a good material and PP (polypropylene) would be good as well each material being progressively stiffer. PU depending on grade might be too soft. EPDM like in roofing membrane would be very weather resistant and flexible. It doesn't take much material to make four mudflaps so even PU would not be costly from a materials standpoint. The ultimate mudlfap would be 80-100 mil thick scrim(fabric) reinforced PVC or PVC/TPO blend. Tough, flexible.

How do I know this? 12-year plastics engineer working for a reinforced plastic membrane company.
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Old 03-16-2001, 05:01 PM   #5
TeamSUBARU
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I have a set of 4 "Zach Flaps" if you want em in yellow...they are as stiff as a cutting board! HA HA (just kidding. I wouldn't pass these on to anyone! They are crap!)

Use the soft material so it will bend and flex on curbs, speedbumps, etc...

[This message has been edited by TeamSUBARU (edited March 16, 2001).]
 
Old 03-16-2001, 05:14 PM   #6
beachbum
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Thanks for the info, guys. Gotta love a conversation where the term "ultimate mudflap" comes up. Right now I'm leaning towards LDPE simply because it's so cheap and easy to come by.

Plastics engineer, eh Ginseng? Does that mean you could hook me up with some of that fabric reinforced PVC stuff?

TeamSUBARU, thanks for the generous offer, but I think I'm going to have to decline. I've heard too many horror stories about "Zach Flaps".

Josh

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Old 03-16-2001, 06:55 PM   #7
North Ursalia
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Josh, take it straight from the horse's ass (I mean MOUTH!!!! )... you want to use LDPE. It's tough as nails, pretty stiff as long as it's the good 1/8" or thicker, but it's nothing like a cutting board

Brian
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Old 03-16-2001, 07:15 PM   #8
Ginseng
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Joshbum,

PM me if you're interested in trying out a few different materials for mudflaps. Let me know how many square feet you need. Keep in mind, there's not a large choice in color, mostly grays, black and white.

If they work, you would, without a doubt, have some of the most unique mudflaps around. Aside from the guy who uses freeze-dried roadkill possum carcasses for flaps.

Wilkey
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Old 03-17-2001, 12:50 AM   #9
beachbum
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Question Want to make my own mudflaps- LDPE, polyurethane, EPDM, neoprene, etc...

Using North Ursalia's STi Mudflap Patterns (thanks, Brian! ), I plan on making my own rally style mudflaps soon. I have access to all kinds of plastic and rubber sheets, but the problem is I can't decide what to use. I know most people have used LDPE, and that sounds pretty good, but I want something that will be semi flexible, but not flap in the wind like you see some rally cars. Is this what LDPE is like? I see some people are using (poly)urethane, but that stuff costs a little more than I want to spend. Suggestions?

Josh
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Old 03-17-2001, 12:55 AM   #10
Subie Gal
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should not be too stiff... or you will catch them and tear them loose on something...

pretty much all materials will work.. just depends on what YOU want..

j.
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Old 03-17-2001, 01:58 PM   #11
beachbum
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I've read several people say that a sharp razor blade is the best (but still a major pain), but for LDPE I'm going to try a jigsaw with some medium toothed blades. The coarse blades worked perfectly for some really rigid ABS sheets I had to cut, so I figure I'll give it a try.

Josh
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Old 03-17-2001, 02:45 PM   #12
North Ursalia
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A sharp razor blade will work, but it will still be tough... keep the speed low on the saw if you can, so you don't 'melt' the LDPE.

Brian
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Old 03-18-2001, 12:51 AM   #13
direwlf
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Any special tools required to cut and mark the ldpe? looking at making a set of flaps myself, since I want to start navex rallying and feel this bizarre urge to save my paint
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