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Attackpoint - performance and training tools for orienteering athletes

Discussion: "Poly" map bags

in: Orienteering; General

Apr 22, 2017 10:13 AM # 
In a previous Attackpoint thread, map bags were stated to be made of “Poly” with some contributors identifying this as Polyethylene, or Low Density PolyEthylene ( LDPE)

In Tasmania we have just switched from Polyethylene to bags made from Polypropylene, (More specifically BOPP: Biaxially Orientated PolyPropylene) with a thickness of 45 microns (1.77mil) because we think the bags are clearer and tougher.

There are some comparison pictures of both bag types with and without maps in the latest edition of our on line magazine:

These map bags are disposable and foldable and not the heavier reusable map “cases” typically used for rogaining events.

Is anyone else using Polypropylene bags who can comment on their comparative performance? Do some people mean Polypropylene when referring to "Poly" bags?

The only downside we have noticed so far apart from slightly more expense is one or two bags splitting on the side when inserting the map.
Apr 23, 2017 7:28 AM # 
All the map bags I've ever used have been made of plastic.
Apr 23, 2017 8:58 AM # 
Time to go to Pretex Tasmania!
Apr 23, 2017 9:01 AM # 
Haha, page does not exist - much like your result from the sprint qualifier in AP.
Apr 23, 2017 9:17 AM # 
Uncle JiM:
It will exist if he edits his link
Apr 23, 2017 9:55 AM # 
Sorry, but I should have explained that you have to scroll to the right from the cover page a few times to get to the page with the map bag comparison pictures

Here is a direct link to ths relevant page:
Apr 23, 2017 10:06 AM # 
I was referring to Simmo's link. Your newsletter is too slow to load on my computer.
Apr 23, 2017 10:47 AM # 
As usual tRicky, you're talking rubbish :-)

Martin - who uses plastic bags any more, except IOF? (Just like 'who uses 1:15000 any more except IOF?')
Apr 24, 2017 1:28 AM # 
We routinely use map bags for club, school and regional events. Its a different story for national IOF type events.

I was not aware that synthetic paper was routinely used overseas for local type events.
Apr 24, 2017 4:20 AM # 
We use cheap A4 resealable bags from whichever office supplies shop sells cheapest at the time we run out. We have very low attendance (15 - 30 people) at our events so easy to hand them out as required.
Apr 24, 2017 5:19 AM # 
I've never received a bagged map at a club event, only at major events - in Aus that means Badge and Championships. For the past few years bagged maps would be very unusual at these events, the norm is waterproof paper, and the best (by far) of these is Pretex. In WA we use Pretex for our School Champs too.

Bags are available on request at club events, but most people bring their own.
Apr 24, 2017 6:05 AM # 
Simmo, I should have been more specific. I meant to say at 24 April that we do not use synthetic paper maps at local events but have bags available for use in the rain. Sometimes organisers pre bag the maps at local events when rain is forecast.

We don't have a culture of people bringing their own.
Apr 24, 2017 10:55 AM # 
If people keep taking home bags they get at events, perhaps they should be encouraged to bring them back :-)

Fairly sure we still use them at non-championship events where looking at the map beforehand is not allowed (e.g. our SOL events and NavDash (sprint) where rain is forecast). The map is not necessarily in the bag though.
Apr 24, 2017 10:59 AM # 
I accumulate hundreds of bags, and have on occasion donated them to the club to distribute to others at local meets.

We (often) use bags from a local company called Hudson Poly Bag. They sell two kinds of polyethylene as well as polypropylene, but I don't know which kind we get.
Apr 24, 2017 3:01 PM # 
Thirty years ago, I'm pretty sure that NEOC always got polythene bags from Hudson (or sometimes other sources). A clearer bag after rumpling sounds nice, but splitting seems concerning.
Apr 24, 2017 5:54 PM # 
For clarification "polythene" is a British colloquial term for polyethylene (aka polyethene). Jim's extensive time spent living outside the US is showing again, as it often does. :-)
Apr 24, 2017 10:15 PM # 
Or my overactive spell checker's multilingualism. But it's probably why I didn't notice it.
Apr 26, 2017 2:43 AM # 
As usual tRicky, you're talking rubbish

Finally realised why I couldn't find you in the results. I was doing a search for Tony, not Anthony! Plus I was searching for you in 6th (I'm sure your log initially stated this but now it's an upside down 6).
Apr 26, 2017 1:24 PM # 
Don't let the moths moths get to them...
Apr 26, 2017 1:55 PM # 
Or chuck an appropriate moth/caterpillar in the trash bag at the finish to take care of the plastic tat. Just make sure the trash bag is paper. (Could be a problem for all those trash collectors who insist on everything in plastic bags. "It was in a plastic bag...")
Apr 26, 2017 11:54 PM # 
Plastic doesn't pollute; people pollute plastic.

This discussion thread is closed.