Thanks for the advice. I have the results from the material manufacturer,
but I was wanting to know if anyone had carried out any independent research
in this area.
From: Advantage Prototype Systems <firstname.lastname@example.org>
To: Michael Priest <M.L.Priest@tesco.net>
Date: 30 July 2001 13:45
Subject: Re: Thermal degradation of polymers?
>Michael, Each polymer reacts differently. Polyethylene is one that has
>very little change after prolonged heating. There are some flame retardant
>materials that will degrade in minutes. The best thing to do is check
>the material supplier for there research.
>Advantage Prototype Systems.
>----- Original Message -----
>From: Michael Priest <M.L.Priest@tesco.net>
>Sent: Sunday, July 29, 2001 9:56 PM
>Subject: Re: Thermal degradation of polymers?
>> Hi all,
>> Bearing in mind that rapid tooling mould cycle times are often longer
>> conventional tooling, a molten polymer will remain static in the barrel
>> an injection moulding machine for a greater length of time than in a
>> production environment. Has anyone established any links between the
>> prolonged heating of a molten semi-crystalline polymer in the machines
>> barrel and the mechanical properties or shrinkage that results in the
>> mouldings? I would assume that after a period of time the polymers
>> would degrade and the properties and shrinkage of the moulding would be
>> affected. Any suggestions?
>> Mick Priest
>> Engineering Dept.
>> Warwickshire College
>> Leamington Spa
>> For more information about the rp-ml, see http://rapid.lpt.fi/rp-ml/
For more information about the rp-ml, see http://rapid.lpt.fi/rp-ml/
This archive was generated by hypermail 2.1.2 : Fri Jan 04 2002 - 09:57:35 EET