Chance of CD melting in hot climates?

Typically I will constantly forget to remove a CD from the player. In
my past the player was located at the bottom of the dash.
On the Sienna 06 it is near the top!
Any case of a CD melting or damaging the player in the hot south or
even north?

j

joe wrote:[color=blue]
> Typically I will constantly forget to remove a CD from the player. In
> my past the player was located at the bottom of the dash.
> On the Sienna 06 it is near the top!
> Any case of a CD melting or damaging the player in the hot south or
> even north?[/color]

The melting point of polycarbonate is about 250 degrees C. Not to
worry.

"joe" <nospam@invalid.com> wrote in message
news:ct6p72549icpcm6p2ueksvs977vnlkkaji@4ax.com...[color=blue]
> Typically I will constantly forget to remove a CD from the player. In
> my past the player was located at the bottom of the dash.
> On the Sienna 06 it is near the top!
> Any case of a CD melting or damaging the player in the hot south or
> even north?
>
> j
>[/color]

Yes, a slim one.
--

Ray O
(correct punctuation to reply)

On Tue, 30 May 2006 19:34:47 GMT, "Travis Jordan" <no.one@no.net>
wrote:
[color=blue]
>joe wrote:[color=green]
>> Typically I will constantly forget to remove a CD from the player. In
>> my past the player was located at the bottom of the dash.
>> On the Sienna 06 it is near the top!
>> Any case of a CD melting or damaging the player in the hot south or
>> even north?[/color]
>
>The melting point of polycarbonate is about 250 degrees C. Not to
>worry.
>[/color]

Attempting to recall my properties of materials classes ...
I frequent Palm Springs, CA and 105 deg F is a rule and not the
exception. Air temp inside a car can get well over 150deg F and a
dark dash SHOULD NOT BE TOUCHED without welding type gloves - I will
make a wild guess north of 200degF.
So we have a melting point of 250 - 200 = a small spread. Between
solid and melting we have a very pliable stage ...
Perhaps there is no problem but a check in the real world is generally
a sound idea. If all else fails - ask the mechanic who has lived with
all the design mistakes <grin>.

j

joe wrote:[color=blue]
> Attempting to recall my properties of materials classes ...
> I frequent Palm Springs, CA and 105 deg F is a rule and not the
> exception. Air temp inside a car can get well over 150deg F and a
> dark dash SHOULD NOT BE TOUCHED without welding type gloves - I will
> make a wild guess north of 200degF.[/color]
[color=blue]
> So we have a melting point of 250 - 200 = a small spread. Between
> solid and melting we have a very pliable stage ...[/color]

Um, no, the melting point is about 250 degrees C. As in Centigrade. Do
the math.

"joe" <nospam@invalid.com> wrote in message
news:ct6p72549icpcm6p2ueksvs977vnlkkaji@4ax.com...[color=blue]
> Typically I will constantly forget to remove a CD from the player. In
> my past the player was located at the bottom of the dash.
> On the Sienna 06 it is near the top!
> Any case of a CD melting or damaging the player in the hot south or
> even north?
>
> j
>[/color]

It is theoretically possible that the CD could warp just a bit on a very hot
day depending on how it is stored internally in the CD player. CD's spin a
very high speeds and even a slight warp could cause a problem.

Hopefully the CD player manufacturer has taken this into account, and the CD
is evenly supported so as not warp. I leave mine in all the time and have
never had a problem.

"Travis Jordan" <no.one@no.net> wrote in message
news:GY1fg.28067$Mg2.5952@fe08.news.easynews.com...[color=blue]
> Um, no, the melting point is about 250 degrees C. As in Centigrade. Do
> the math.
>[/color]

Melting point is not the same as bending point.

On Tue, 30 May 2006 14:35:48 -0600, "Mark A" <nobody@nowhere.com>
wrote:
[color=blue]
>"joe" <nospam@invalid.com> wrote in message
>news:ct6p72549icpcm6p2ueksvs977vnlkkaji@4ax.com...[color=green]
>> Typically I will constantly forget to remove a CD from the player. In
>> my past the player was located at the bottom of the dash.
>> On the Sienna 06 it is near the top!
>> Any case of a CD melting or damaging the player in the hot south or
>> even north?
>>
>> j
>>[/color]
>
>It is theoretically possible that the CD could warp just a bit on a very hot
>day depending on how it is stored internally in the CD player. CD's spin a
>very high speeds and even a slight warp could cause a problem.
>
>Hopefully the CD player manufacturer has taken this into account, and the CD
>is evenly supported so as not warp. I leave mine in all the time and have
>never had a problem.
>[/color]

Travis you are correct C is not F sorry.
Mark - I have an "El Chepo" CD player at my desk where I can observe
the CD rotating. My guess is - very slowly in that I can almost read
the text on the CD as it is rotating.
What is the rpm - anybody?
j

"joe" <nospam@invalid.com> wrote in message
news:ct6p72549icpcm6p2ueksvs977vnlkkaji@4ax.com...[color=blue]
> Typically I will constantly forget to remove a CD from the player. In
> my past the player was located at the bottom of the dash.
> On the Sienna 06 it is near the top!
> Any case of a CD melting or damaging the player in the hot south or
> even north?
>
> j
>[/color]

Some here have said it's a hazard, but I used to live in Arizona, the
California desert, as well as my native Florida. I left CDs in the player
all the time, and never had a problem. The only time a CD melted was
outside the player.

Having said that, you should never use original CDs in your car; not only
because of the potential for damage, but also theft, should your car/truck
be stolen. A friend of mine's F-150 was stolen, along with about $300
worth of CDs. She was more heartbroken about that. (Even I think the
truck was more important...)

Natalie

It hasn't happened to me. I left a CD in the player of my motorhome without
any problem at all.





"joe" <nospam@invalid.com> wrote in message
news:ct6p72549icpcm6p2ueksvs977vnlkkaji@4ax.com...[color=blue]
> Typically I will constantly forget to remove a CD from the player. In
> my past the player was located at the bottom of the dash.
> On the Sienna 06 it is near the top!
> Any case of a CD melting or damaging the player in the hot south or
> even north?
>
> j
>[/color]

The speed of a CD varies depending on the diameter being read - faster
near the center and slower at the outer edge. I'm not sure but I think
it goes from 200 to 600 RPM.


---MIKE---[color=blue][color=green]
>>In the White Mountains of New Hampshire
>> (44° 15' N - Elevation 1580')[/color][/color]

joe wrote:[color=blue]
> What is the rpm - anybody?[/color]


Not positive, but I think 1X for a CD is between 150 and 160 RPM.

"joe" <nospam@invalid.com> wrote in message
news:958p72lk3hckqu4nj4rh4nl03c8a4gqfa5@4ax.com...[color=blue]
> On Tue, 30 May 2006 19:34:47 GMT, "Travis Jordan" <no.one@no.net>
> wrote:
>[color=green]
>>joe wrote:[color=darkred]
>>> Typically I will constantly forget to remove a CD from the player. In
>>> my past the player was located at the bottom of the dash.
>>> On the Sienna 06 it is near the top!
>>> Any case of a CD melting or damaging the player in the hot south or
>>> even north?[/color]
>>
>>The melting point of polycarbonate is about 250 degrees C. Not to
>>worry.
>>[/color]
>
> Attempting to recall my properties of materials classes ...
> I frequent Palm Springs, CA and 105 deg F is a rule and not the
> exception. Air temp inside a car can get well over 150deg F and a
> dark dash SHOULD NOT BE TOUCHED without welding type gloves - I will
> make a wild guess north of 200degF.
> So we have a melting point of 250 - 200 = a small spread. Between
> solid and melting we have a very pliable stage ...
> Perhaps there is no problem but a check in the real world is generally
> a sound idea. If all else fails - ask the mechanic who has lived with
> all the design mistakes <grin>.
>
> j[/color]

It's safe to assume that the INSIDE of the CD player does not get to 250F.

"joe" <nospam@invalid.com> wrote in message
news:ct6p72549icpcm6p2ueksvs977vnlkkaji@4ax.com...[color=blue]
> Typically I will constantly forget to remove a CD from the player. In
> my past the player was located at the bottom of the dash.
> On the Sienna 06 it is near the top!
> Any case of a CD melting or damaging the player in the hot south or
> even north?
>
> j
>[/color]

You're more likely to screw things up if you don't know there's a CD in the
player already.

mark_

"Mark A" <nobody@nowhere.com> wrote in message
news:0cOdnahUCLx-MOHZ4p2dnA@comcast.com...[color=blue]
> "Travis Jordan" <no.one@no.net> wrote in message
> news:GY1fg.28067$Mg2.5952@fe08.news.easynews.com...[color=green]
>> Um, no, the melting point is about 250 degrees C. As in Centigrade. Do
>> the math.
>>[/color]
>
> Melting point is not the same as bending point.[/color]

250 C is over 480 F. Even if it could somehow get up to 250 F inside a
car CD player (way more than hot enough to boil water, and the parts of the
car in direct sunlight would have to be much hotter) it would still be 230
degrees colder than the melting point of polycarbonate. Usually, warping or
bending points are relatively close to melting points. I doubt it would
ever get up to 250C in the CD player, even in the middle of the Sahara on
summer solstice. Heat radiation and convection of the air (even if the air
is 130 degrees) would be very significant. But even if it did, the CD is
still 230 degrees cooler than melting point, so it probably hasn't even
started to soften at that point.