box made of polypropylene

[dan5505 10+ year member]

has anyone ever used it. a buddy of mine has access to a bunch of 1/2'' stuff. any ideas how it will perform compared to mdf.

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[mrbomb 10+ year member]

sounds like a pretty cool idea, i say give it a try if you say you have access to a bunch and let us know

 

[mapolley07 10+ year member]

i have no idea....polypropylene tends to build up quite a bit of static though (think plastic grocery bags and the slides at Chuck-E-Cheese). I don't know whether that would make a big electrical impact on the sub or not

 

[mrbomb 10+ year member]

true on the static but if its screwed to the car it would be grounded so it should cancel the charge

 

[GSRswapandslow 10+ year member]

it'll flex i'd assume.....i mean...try it, obvioulsy, and if it doesn't work....simple as that.

 

[helotaxi 5,000+ posts]

It will flex like hell.

 

[dan5505 10+ year member]

i have no idea....polypropylene tends to build up quite a bit of static though (think plastic grocery bags and the slides at Chuck-E-Cheese). I don't know whether that would make a big electrical impact on the sub or not

actually, grocery bags are made of low density polyethylene i believe. the only problem i can see happening with a polymer like polypropylene is that it has different elastic modulus than woods. the problem with polymers is that, depending on slight variations in chemistry, the mechanical properties like elastic modulus change. for a sub box, my guess is a high elastic modulus would be best, so, i guess it all depends how stiff this polypropylene is. i haven't seen it yet.

 

[mapolley07 10+ year member]

crazy flex+static buildup=bad box material imo

i would maybe try it in combination with MDF, or use it for spacers in doors or something. i don't thing that polypropylene would make a good box on its own

 

[dan5505 10+ year member]

the whole idea of using polypropylene was to make an weather prof box and put it in a jeep.

 

[Kil4Thril 10+ year member]

Large, straight panels flex like a mother****er. I tried it with 7/8" HDPE (think really thick cutting boards). If you could mold it so there aren't any straight panels, it works fine. Kinda like the Thunderforms and such. The plastic does work fantastic for mounting rings in doors since it can't soak water.

 

[dan5505 10+ year member]

maybe if it was braced to hell, the flexing would be minimized.

 

[dan5505 10+ year member]

or, i suppose, there are better ways to weatherproof a box made of mdf

 

[miker 5,000+ posts]

What is polypropylene??

 

[97gmcsierra 10+ year member]

My subs have polypropylene cones:fyi:..... They dont flex...//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

I wouldn't think big sheets of it would be good without bracing.

What is polypropylene??

http://en.wikipedia.org/wiki/Polypropylene

 

[miker 5,000+ posts]

What about outdoor paint?