Using P-Tex candles for bodywork repair?

Discussion in 'Equipment' started by meat popsicle, Dec 9, 2004.

  1. meat popsicle

    meat popsicle Ignostic

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    Always there with the low-down Happe! :thumb Just a sodering iron eh? That might be a good lil tool to take on adventures, although Gary's tricks wouldn't require the xtra piece. :dunno I want to try and rebuild any material loss so I am going to continue to dig.

    I wonder why its not good to use PE on PA tanks :dunno - that would be thru P-Tex repair materials - like for ski and snowboard repairs.

    (PS - didn't you already say the tank is PA? There will be a bit from the smoothing - I will torch it and inhale deeply... :stoned more later)
    #21
  2. meat popsicle

    meat popsicle Ignostic

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    So, from the earlier links on plastic welding:

    PA is nylon (my shot in the dark was pretty good :D). Some more on the choice of materials for the tank (well, one of many nylons but I dunno which exact resin was used):

    http://www.rtpcompany.com/info/guide/descriptions/0200H.htm

    "Advantages

    1. Toughness
    2. Chemical resistance to hydrocarbons

    Limitations

    1. High cost relative to other nylons

    General Description

    Many types of nylon are commercially available. The most popular type is nylon 6/6, followed by nylon 6, then nylon 6/12, nylon 11 and nylon 12. Nylon 6/6 offers an excellent balance of properties and is the strongest of the nylons.

    Nylon 6 has improved creep resistance over nylon 6/6 but has a lower modulus. Nylon 6 absorbs moisture more rapidly but has improved processability. Compared to Nylon 6/6 it can be molded about 80 degrees F (27 degrees C) lower with less mold shrinkage because it is slightly less crystalline.

    Nylons absorb more moisture from the air than most other polymers. This has an effect on processability, dimensional stability and physical properties. Moisture acts as a plasticizer, reducing tensile strength and stiffness and increasing elongation. But, while absorbed moisture reduces many properties, nylon owes part of its toughness to the plasticizing effect of moisture. As moisture content rises, significant increases occur in impact strength and general energy absorbing characteristics. Properly recognized and accounted for, the effect of moisture on the processing and properties of nylon need not be of great concern.

    Glass-reinforced nylon results in materials possessing tensile strengths up to 32,000 psi, approximately 200% better than the base resin. Heat deflection temperatures increase from 160 degrees F to 500 degrees F (71 degrees C to 260 degrees C).

    Carbon fiber-reinforced nylons excel over their base resin and glass-reinforced nylons with improved tensile and flexural strengths -- comparable to some die casting alloys. Nylon 6/6 has up to 36,000 psi tensile and 50,000 psi flexural strength; lower expansion; better dimensional stability; and improved thermal conductivity and electrical conductivity. Nylon 6/6 has static dissipative characteristics when reinforced with carbon fiber.

    Because of their high modulus, good wear resistance and static electricity discharge characteristics, carbon fiber-reinforced nylons have potential for replacement of die cast metals, such as those used in moving textile machine parts. "

    Just one of many here:
    http://www.rtpcompany.com/info/guide/index.htm

    =============================================

    Now, Harbor Freight has a Plastic Welder that some say works ok, especially for the price:

    [​IMG]
    http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=41592

    For the setup Harbor Freight sells plastic welding rods (50 pc):

    [​IMG]
    http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=41602

    The rods are three types:

    1) PVC (polyvinylchloride - spelling? :lol3)

    didnt find good info like for the others... :cry

    2) PC PP (Polycarbonate with Polypropylene?)

    dunno what Polypropylene does but this page says that PC is partially soluable to hydrocarbons... that sounds like a bad idea:

    http://www.rtpcompany.com/info/guide/descriptions/0300.htm
    http://www.rtpcompany.com/info/guide/descriptions/0100.htm

    And 3) PC ABS (Polycarbonate with Acrylonitrile Butadiene Styrene I guess :dunno)

    again, worried about the partial soluable thingey.

    http://www.rtpcompany.com/info/guide/descriptions/2500.htm

    Maybe I should look for other rods? :dunno Happe, you wanna hit up yer buddy again? :deal
    #22
  3. meat popsicle

    meat popsicle Ignostic

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  4. meat popsicle

    meat popsicle Ignostic

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  5. Happe

    Happe Adventure Bike Spanner Man

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    Sorry meat,

    my mate went off to holiday.
    You know that a lot of helmets are made out of PA? :wink:
    (Polyamide)

    cheers

    Stefan
    #25