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Re: [PSUBS-MAILIST] glueing acrylic

Which is better under pressure, Lexan or acrylic? And how expensive does it get when it's 4" thick (by the square foot)? 
Carl


Brian Cox wrote:

You can get acrylic as thick as 4" so that way you would glue less pieces.
Brian "cement" Cox 

    ----- Original Message -----
    From: Emile <mailto:2stroke@hetnet.nl>
    To: personal_submersibles@psubs.org
    <mailto:personal_submersibles@psubs.org>
    Sent: Friday, October 15, 2004 8:20 AM
    Subject: Re: [PSUBS-MAILIST] glueing acrylic

    Thank you for the useful information,
I was studying the possibility of constucting a dome from ring of 50 
    mm acrylic plate and then machine it  (This was discussed before).
    Just add 25 % wall thickness for glue uncertainty.
    Why not thust glue? All modern airliners are glued together.
    I am also working on a tool for blowing a dome, wich has a better
    material efficiency.
Grs, Emile 
        ----- Original Message -----
        From: No Periscope <mailto:noperiscope@yahoo.com>
        To: personal_submersibles@psubs.org
        <mailto:personal_submersibles@psubs.org>
        Sent: Friday, October 15, 2004 4:42 PM
        Subject: RE: [PSUBS-MAILIST] glueing acrylic

        I worked for the university of Colorado for a few years and we
        used lots of Acrylic for building test models of buildings and
        Dams and just about any thing that needed to be built.  We used
        a glue called PS 30 and it was very strong.  It's a two part
        glue and if the two components where not in just the right
        amount it would craze.  But I never saw any of the joints
        separate.  However,,,,I would never ever consider using anything
        but a full piece for a view port.   DJB

        Pierre Poulin <pipo305@hotmail.com> wrote:

            Hi emile,

            My friend work at the university here and he glue acrylic
            all the time. I
            asked him and here is the answer...

            You need: a tank about 0.5" deep and Dichloromethane (french
            word sorry).

            How to do: let's say you have a viewport of 8" diameter. you
            need about 1/8"
            of Dichloromethane on the bottom of the tank, then you drop
            the viewport
            into the tank so all the surface you want to glue is dipping
            in the dich...
            wait for about 15 secondes, pull up the viewport about press
            it to the other
            surface.

            Results: My friend says that you may have some small bubbles
            trapped between
            the 2 parts. As for strenght, he says that it is as strong
            as a full plate
            of acrylic. he does boxes shape and when they "destroye"
            them, the acrylic
            almost always break right next to the join. Not the join itself.

            Hope it helps!

            P! ierre Poulin
            "building a dry-ambient sub"


             >From: "Emile" <2stroke@hetnet.nl>
             >Reply-To: personal_submersibles@psubs.org
             >To:
             >Subject: [PSUBS-MAILIST] glueing acrylic
             >Date: Fri, 8 Oct 2004 15:12:20 +0200
             >
             >Hello all,
             >
             >Can anybody help me to some accurate data about glueing
            acrylic to acrylic?
             >the following points:
             >
             >-how stong. absolute and relative to the acrylic
             >-methods/ materials
             >-optical quality
             >
             >thanks in advance.
             >
             >Emile D.L. van Essen
             >www.AiResearch.nl

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