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P80 Fuel tank - what type of plastic? [HDPE with Nylon additive] Topic is solved

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Re: Fuel tank - what type of plastic?

Post by abscate » Tue Aug 27, 2019 5:45 am

Well , crap on rye

From my 1999
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Re: Fuel tank - what type of plastic?

Post by abscate » Tue Aug 27, 2019 5:46 am

I guess we can google PEHD SS

Some variant of HDPE is my guess
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Re: Fuel tank - what type of plastic?

Post by BlackBart » Tue Aug 27, 2019 9:49 am

7........huh.


So...."other"...a catch-all for misc plastics.

iStock-530479243-5.jpg
iStock-530479243-5.jpg (58.61 KiB) Viewed 47 times


"The #7 category was designed as a catch-all for polycarbonate (PC) and “other” plastics, so reuse and recycling protocols are not standardized within this category. Of primary concern with #7 plastics, however, is the potential for chemical leaching into food or drink products packaged in polycarbonate containers made using BPA (Bisphenol A). BPA is a xenoestrogen, a known endocrine disruptor.

"Number 7 plastics are used to make baby bottles, sippy cups, water cooler bottles and car parts. BPA is found in polycarbonate plastic food containers often marked on the bottom with the letters “PC” by the recycling label #7. Some polycarbonate water bottles are marketed as ‘non-leaching’ for minimizing plastic taste or odor, however there is still a possibility that trace amounts of BPA will migrate from these containers, particularly if used to heat liquids."
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Re: Fuel tank - what type of plastic?

Post by abscate » Tue Aug 27, 2019 9:54 am

Im guessing that the tank is HDPE with some kind of liner for the fuel container. That plastic liner means it can't be recycled as HDPE so it get the 7-OTHER

Maybe thats the PEHD-SS labelling?

FOr purposes of welding, I would try an HDPE weld - I bet that works outside.
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Re: Fuel tank - what type of plastic?  Topic is solved

Post by abscate » Tue Aug 27, 2019 10:01 am

abscate wrote:
Tue Aug 27, 2019 9:54 am
Im guessing that the tank is HDPE with some kind of liner for the fuel container. That plastic liner means it can't be recycled as HDPE so it get the 7-OTHER

Maybe thats the PEHD-SS labelling?

FOr purposes of welding, I would try an HDPE weld - I bet that works outside.

God, this guy is good.

Just got off the phone with a friend at Dupont. SELAR is a Dupont Nylon, designed to be mixed with HDPE product, and was used in fuel tanks for Volvo, Kia, Saab, Mitsubishi, Toyota.

Final Answer - its an HDPE tank, with a Nylon additive for compatability with ethanol fuels.

https://books.google.com/books?id=TcQ7f ... PE&f=false
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Re: Fuel tank - what type of plastic?

Post by BlackBart » Tue Aug 27, 2019 10:07 am

"High-Density Polyethylene, usually shortened to HDPE or PEHD, is a plastic polymer with flexible properties which make it ideal for a wide range of applications.

"High-density polyethylene, as the name suggests, has a higher specific density than low-density polyethylene, though this difference is only marginal. What really makes the difference in the physical properties of HDPE is the lack of branching, meaning it is light with a high tensile strength. Because there is no branching the structure is more closely packed, make HDPE a linear polymer. The branching can be controlled and reduced by using specific catalysts during production.

"HDPE has many advantageous properties that make it important in the manufacturing of different products. HDPE has a comparatively high density compared to other polymers, with a specific gravity of 0.95. HDPE is relatively hard and resistant to impact and can be subjected to temperatures of up to 120oC without being affected."


That's 250F....is the tailpipe 10" away generating 250º?

So, is this telling me it's a variation of HDPE, and why not classify it as #2 then? SS usually refers to stainless...that could be coincidence.

Here's a gate valve from a company in the UK made from "PEHD 500".....

Plastic PEHD Slide Gate Valve.png
Plastic PEHD Slide Gate Valve.png (21.48 KiB) Viewed 39 times
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Re: Fuel tank - what type of plastic?

Post by BlackBart » Tue Aug 27, 2019 10:09 am

abscate wrote:
Tue Aug 27, 2019 10:01 am
Final Answer - its an HDPE tank, with a Nylon additive for compatability with ethanol fuels.
Oh! Very good!
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Re: Fuel tank - what type of plastic?

Post by abscate » Tue Aug 27, 2019 10:14 am

The Nylon additive prevents it from being recycled as (2), as it is a mix - thus its a sad (7) OTHER
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Re: P80 Fuel tank - what type of plastic? [HDPE with Nylon additive]

Post by BlackBart » Tue Aug 27, 2019 10:18 am

The advantage of knowing the right kinds of people! MVS comes through again.
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Re: P80 Fuel tank - what type of plastic? [HDPE with Nylon additive]

Post by BlackBart » Tue Aug 27, 2019 10:38 am

Sure looks to me like this tool....

https://www.wegenerwelding.com/prod_hand_airtherm.php
prod_hand_airtherm.jpg
prod_hand_airtherm.jpg (22.2 KiB) Viewed 26 times


...is the same as this tool... (one has a feed tip added)
https://www.harborfreight.com/plastic-w ... 96712.html
image_11982.jpg
image_11982.jpg (63.98 KiB) Viewed 26 times
Wegener is the supplier of all the professional tools a local industrial plastics fabrication company uses.
ex-1984 245T wagon
1994 850T wagon
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Is it time for a 1964 122 wagon?

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