|
Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
|
|
|
Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
|
In Reply to: how to a warp a record posted by waltjohns on May 20, 2016 at 14:32:41:
PVC is an elastomer and like all plastic materials has a melt index, the temperature at which it turns from a solid to a viscosity that will enable molding. For a generic PVC, that temperature is about 330 degrees F to 360 degrees F, depending on the actual formulation of PVC. However, the temperature at which thermal deflection, or getting soft, might occur is much lower. Again, depending on the specific resin used, thermal deflection should be expected as low as 120 to 130 degrees F and as high as maybe 150 degrees F. As it applies to an LP, a record left on a flat surface at an ambient temperature of 130 degrees F might not incur any physical damage or deformation because it is on a flat surface. Basically, there was no real way the part could deflect. One left on an uneven surface at the same ambient temperature, like a car seat for instance, might very well deform. Once the deformation has occurred, cooling the part (running the car's AC, for instance) will cause it to retain it's new shape - just like it was being molded in a factory. Because the inside temperature of an automobile on a hot summer day can easily reach 130 degrees F, LP deformation is a very real possibility. Melt index and thermal deformation are based more on temperature than time, so it should be expected that placing an album on an uneven surface in a hot car will quickly cause deformation. It depends on a lot of factors obviously, but the time for a PVC part to reach a temperature in an environment already at or near the heat distortion temperature is quite short. While direct sunlight will aid in heating the inside of a car, it is the ambient temperature that is the real culprit. The specific temperatures listed are for a generic PVC resin and not necessarily a finished, molded product such as an LP. However, the temperatures listed could be used as a guide for a molded part like an album. In short, don't leave LP's in a hot car in the summertime.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: how to a warp a record - Paul Wilson 10:32:25 05/23/16 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
