Re-using plastics.

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Re-using plastics.
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Bodrighy

Joined: 15 Aug 2008
Posts: 2157
Location: Near Devizes

Posted: Fri Sep 05, 14 10:22 am Post subject:
Different types of plastic need different glue so I have found it a matter of experimenting on the odd occasions when I have wanted to glue plastic. Strongest bond is probably melting both parts though as said you need to be sure there won't be toxic fumes given off. Pete

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Fri Sep 05, 14 1:15 pm Post subject:

Bodrighy wrote:

Different types of plastic need different glue so I have found it a matter of experimenting on the odd occasions when I have wanted to glue plastic. Strongest bond is probably melting both parts though as said you need to be sure there won't be toxic fumes given off.

Pop bottles are a fairly consistent type of plastic (is it PET?), and I don't think they can be welded as, when heated they shrink faster than they melt.

dpack

Joined: 02 Jul 2005
Posts: 46207
Location: yes

Posted: Fri Sep 05, 14 1:26 pm Post subject:
i have used a hot glue gun on pet but it isnt very strong.sanding a rough patch before sticking helps a bit.

john

Joined: 19 Jan 2005
Posts: 309
Location: s.e.london

Posted: Sun Sep 07, 14 4:53 pm Post subject:

7-9-2014. Hi ALL, I hope you don't mind me saying, to see how I reuse lots of Waste Plastic Containers to grow things in please visit my website www.recycling.moonfruit.com or my FB group 3R's Waste Plastic Container Gardening ideas, I'm just trying to spread the word to help to reduce millions of tonnes of waste plastic containers going to landfill and help to feed millions of people at the same time, done in my own way, from me John.JRP.

jamanda
Downsizer Moderator

Joined: 22 Oct 2006
Posts: 35057
Location: Devon

Posted: Sun Sep 07, 14 4:58 pm Post subject:
Hi John. Glad to see you're still at it.

john

Joined: 19 Jan 2005
Posts: 309
Location: s.e.london

Posted: Sun Sep 07, 14 5:06 pm Post subject:

Jamanda wrote:

Hi John. Glad to see you're still at it.

7-9-2014. Hi Jamanda, thank you, I'm just trying to do my bit

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Sun Sep 07, 14 7:23 pm Post subject:

john wrote:

I have, and was reasonably impressed, but I didn't spot anything to help answer the question currently on the table: how to stick pop bottles...

dpack

Joined: 02 Jul 2005
Posts: 46207
Location: yes

Posted: Sun Sep 07, 14 7:34 pm Post subject:
the hot glue gun/sand the bits to be stuck thing is the best i found when doing quite big arty stuff with them maybe just taping/tieing them etc would work , stuffing them into a frame can be a useful method.

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Sun Sep 07, 14 7:36 pm Post subject:

dpack wrote:

the hot glue gun/sand the bits to be stuck thing is the best i found when doing quite big arty stuff with them...

Yes, I'll try that just as soon as I find my glue gun.

gregotyn

Joined: 24 Jun 2010
Posts: 2201
Location: Llanfyllin area

Posted: Tue Nov 04, 14 2:06 pm Post subject:

I work for a tractor dealer and we use stickers to attach cable ties to the sides of machines. The point being that the adhesive side must be good to stand up to the rigors of the farmers using these machines. Basically it is a sticky pad, on the front which is the holder for the cable tie. I will ask the question of the dealer who supplies the pads if he can find out exactly where the adhesive pad comes from-he can only say no at the worst!

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Wed Nov 05, 14 10:07 pm Post subject:
Yesterday I did some experimenting with deep fried milk bottle. I think I read somewhere that if you heat HDPE in oil, then it is a lot easier to avoid burning it. The experiments were not entirely successful, but they were a long way from failures.

dpack

Joined: 02 Jul 2005
Posts: 46207
Location: yes

Posted: Thu Nov 06, 14 12:43 am Post subject:

Hairyloon wrote:

Yesterday I did some experimenting with deep fried milk bottle.

I think I read somewhere that if you heat HDPE in oil, then it is a lot easier to avoid burning it.

The experiments were not entirely successful, but they were a long way from failures.

wow

that is very ..im not sure of the word ...

Mistress Rose

Joined: 21 Jul 2011
Posts: 15966

Posted: Thu Nov 06, 14 9:17 am Post subject:

If you are heating HDPE to reform it, temperature control is the important thing. Hot oil will do the trick, but you need to know the softening and melting points of the plastic and go just above that. it depends on what you want to do. If you are wanting to make it into a molten blob then remould it, you will need a higher temperature (melting point, which may be a range of temperatures) than if you are just trying to reshape over a mould from the sheet (softening point), or in this case, bottle side.

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Thu Nov 06, 14 12:40 pm Post subject:

dpack wrote:

Hairyloon wrote:

Yesterday I did some experimenting with deep fried milk bottle.

wow

that is very ..im not sure of the word ...

Thank you.
Top tip: use a good clean frying oil. All I'd got was 2nd hand chip fat and best quality cold pressed rapeseed. Neither was ideal.

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Thu Nov 06, 14 12:43 pm Post subject:

Mistress Rose wrote:

Nah you don't: just heat it up 'till it goes soft.

Though I imagine it would help, and I do have some digital temperature control equipment I could use...

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