Glue polyethylene [Archive]

koma

Apr 14, 2007, 11:11 AM

I'm trying to get a soft plastic tube run through the polyethylene(?)
cork of a soda bottle.

The problem is that I cannot find a way to make the seal watertight.

I've tried hot glue and different epoxy glues but at some point they
just don't stick to the plastic...

Any ideas on how to do this and get it watertight?

Thanks.

funfly3

Apr 14, 2007, 01:11 PM

koma wrote:
> I'm trying to get a soft plastic tube run through the polyethylene(?)
> cork of a soda bottle.
>
> The problem is that I cannot find a way to make the seal watertight.
>
> I've tried hot glue and different epoxy glues but at some point they
> just don't stick to the plastic...
>
> Any ideas on how to do this and get it watertight?
>
> Thanks.
>
silicon rubber?

koma

Apr 14, 2007, 01:11 PM

On Apr 14, 5:37 pm, funfly3 <dontemai...@ntlworld.com> wrote:
> koma wrote:
> > I'm trying to get a soft plastic tube run through the polyethylene(?)
> > cork of a soda bottle.
>
> > The problem is that I cannot find a way to make the seal watertight.
>
> > I've tried hot glue and different epoxy glues but at some point they
> > just don't stick to the plastic...
>
> > Any ideas on how to do this and get it watertight?
>
> > Thanks.
>
> silicon rubber?

Tried it: doesn't work...

johan denys

Apr 14, 2007, 01:11 PM

"koma" <magnus.ekhall@gmail.com> schreef in bericht
news:1176565368.485584.160710@o5g2000hsb.googlegro ups.com...
> On Apr 14, 5:37 pm, funfly3 <dontemai...@ntlworld.com> wrote:
> > koma wrote:
> > > I'm trying to get a soft plastic tube run through the polyethylene(?)
> > > cork of a soda bottle.
> >
> > > The problem is that I cannot find a way to make the seal watertight.
> >
> > > I've tried hot glue and different epoxy glues but at some point they
> > > just don't stick to the plastic...
> >
> > > Any ideas on how to do this and get it watertight?
> >
> > > Thanks.
> >
> > silicon rubber?
>
> Tried it: doesn't work...
>

sorry to disappoint you: to my knowledge nothing works on polyethylene!

Johan

funfly3

Apr 14, 2007, 05:11 PM

johan denys wrote:
> "koma" <magnus.ekhall@gmail.com> schreef in bericht
> news:1176565368.485584.160710@o5g2000hsb.googlegro ups.com...
>> On Apr 14, 5:37 pm, funfly3 <dontemai...@ntlworld.com> wrote:
>>> koma wrote:
>>>> I'm trying to get a soft plastic tube run through the polyethylene(?)
>>>> cork of a soda bottle.
>>>> The problem is that I cannot find a way to make the seal watertight.
>>>> I've tried hot glue and different epoxy glues but at some point they
>>>> just don't stick to the plastic...
>>>> Any ideas on how to do this and get it watertight?
>>>> Thanks.
>>> silicon rubber?
>> Tried it: doesn't work...
>>
>
> sorry to disappoint you: to my knowledge nothing works on polyethylene!
>
> Johan
>
>
e-6000 is supposed to ??? not tried it, and the other one that might
work is Stabilit Express my Dad swears by it

deestingray

Apr 15, 2007, 03:11 AM

Have you tried polyurethane glue?? It has a tendency to foam up upon
cure and I have found that it is quite good in sealing entry points on
my boats. It is one part and very sticky, a bit like honey.

--
deestingray
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View this thread: http://www.modelpowerboat.com/forum/showthread.php?t=171

William

Apr 15, 2007, 03:11 AM

"koma" <magnus.ekhall@gmail.com> wrote in message
news:1176562109.585542.119190@y5g2000hsa.googlegro ups.com...
> I'm trying to get a soft plastic tube run through the polyethylene(?)
> cork of a soda bottle.
>
> The problem is that I cannot find a way to make the seal watertight.
>
> I've tried hot glue and different epoxy glues but at some point they
> just don't stick to the plastic...
>
> Any ideas on how to do this and get it watertight?

Someone suggested polyurethane glue. If that or epoxy doesn't
work, you're probably not going to find a glue that does.

Polyethylene is about as good as Teflon at shedding glue. (When
they want to glue Teflon to something, they etch one side with an
acid so the glue will bite - not something you want to do at home
even if it would work for polyethylene.)

If your goal is simply to get a watertight passage, you might want
to use one of the fittings they sell for fuel tanks. These compress
a gasket or o-ring against the plastic tank creating a leak-proof seal.

Another alternative that might work is to use an adhesive sealant
to secure a short metal tube through the polyethylene then another
dose of sealant to secure the plastic tube in the metal tube. The
metal tube will prevent the flexible plastic tube from wiggling
and working the seal against the polyethylene loose. Sand every
surface with 120 grit sandpaper and clean thoroughly to ensure
a good seal and some "bite".

-Wm

Axesea

Oct 22, 2007, 10:31 AM

lonewolf55

Nov 01, 2009, 10:56 PM

Hi, know it's a bit dated on this thread, but I found this sealant made for polyethylene tanks.

www.threebond.com
product:TB1743

Three Bond International, Inc.
Cincinnati
6184 Schumacker Park Drive
West Chester
OH 45069
fone 1.513.779.7300
fax 1.513.779.7375

Three Bond International, Inc.
Los Angeles
20815 Higgins Court
Torrance
CA 90501-1830
fone 1.310.320.3342
fax 1.310.618.9507

Three Bond International, Inc.
Detroit
41214 Bridge Street
Novi
MI 48375
fone 1.248.426.7251
fax 1.248.426.7152

From the website: www.threebond.com/atlanta.html
ThreeBond International, Inc.
Atlanta, Georgia
1770 The Exchange, Suite 275
Atlanta, GA 30339
Tel: (513) 779-7300 ext. 1770
Fax:(513) 779-7375

ya true the thread is outdated... but let's fix it....

The fact is that the group of olefins (polyethylene based plastics), which include LDPE, HDPE, and UHMW, are so chemical resistant that modern science has not invented a solvent glue to bond these plastics. Of course, such properties are why these plastics exist and perform their job so well. You might even note that the solvent applicators and most chemical containers are made from polyethylenes.

Thermoplastic welding is the only way you gonna get it to work..... However......

Be aware that many "frosty white" bargain style, ultra low cost glue sticks on the market are nothing more than melted polyethylene plastic which contains no actual adhesive.

If you heat the base material that you are trying to join you can actually get a long lasting fix by applying this type of hot glue stick... surface prepration is key to doing this, just Google "Thermoplastic welding"

Thanx