How HotShotz® Reusable Heat Pack Work
The HotShotz® Reusable Heat Pack is an instant, portable and
re-usable heat pack. With a push of a button the HotShotz®
Heat Pack heats up to 130º within seconds and continues to
generate heat for one to eight hours depending on the size of
the pack used and insulation.
Now you can have instant soothing heat whenever and
wherever you want without the inconvenience of a cord or
microwave. When your HotShotz® Heat Pack® is no longer
producing heat, simply boil in hot water. It will change back to a
liquid form, ready to use again.
The general purpose of heat treatment is to encourage muscle
relaxation and to help relieve or reduce pain. The HotShotz
Reusable Heat Pack® helps to relax tight, stiff, sore muscles
allowing for easier and freer body movements. The HotShotz
Reusable Heat Pack® can be used for neck and shoulder pain,
back pain, and menstrual cramps. Or any place heat comfort is
desired.
By applying a low level of therapeutic heat to an area of pain or
stiffness an individual will experience increased blood flow
through the tissue. This increased blood flow helps to wash
away substances that cause pain, while delivering oxygen and
nutrients to the injured, sore muscle area.
The HotShotz® Reusable Heat Pack can also be used by pet
lovers as well for arthritic or injured animals providing heat
therapy for your four legged friends.
The HotShotz® Reusable Heat Pack is safe and environmentally
friendly, and made in the USA. The case is 22 mil surgical vinyl.
It contains a safe, non-toxic substance, sodium acetate, a form
of salt and water.
For more information on heat packs, check out the web site
How Things Work
re-usable heat pack. With a push of a button the HotShotz®
Heat Pack heats up to 130º within seconds and continues to
generate heat for one to eight hours depending on the size of
the pack used and insulation.
Now you can have instant soothing heat whenever and
wherever you want without the inconvenience of a cord or
microwave. When your HotShotz® Heat Pack® is no longer
producing heat, simply boil in hot water. It will change back to a
liquid form, ready to use again.
The general purpose of heat treatment is to encourage muscle
relaxation and to help relieve or reduce pain. The HotShotz
Reusable Heat Pack® helps to relax tight, stiff, sore muscles
allowing for easier and freer body movements. The HotShotz
Reusable Heat Pack® can be used for neck and shoulder pain,
back pain, and menstrual cramps. Or any place heat comfort is
desired.
By applying a low level of therapeutic heat to an area of pain or
stiffness an individual will experience increased blood flow
through the tissue. This increased blood flow helps to wash
away substances that cause pain, while delivering oxygen and
nutrients to the injured, sore muscle area.
The HotShotz® Reusable Heat Pack can also be used by pet
lovers as well for arthritic or injured animals providing heat
therapy for your four legged friends.
The HotShotz® Reusable Heat Pack is safe and environmentally
friendly, and made in the USA. The case is 22 mil surgical vinyl.
It contains a safe, non-toxic substance, sodium acetate, a form
of salt and water.
For more information on heat packs, check out the web site
How Things Work
The Science Part
These heat pads are extremely cool to watch. Clicking the activator button starts the
crystallization process, and you can see the crystallization proceed through the liquid.
What is happening here is strange, but the process can be understood if you think
about water freezing. Water freezes at 32 degrees Fahrenheit (0 degrees C). If you
were to stick a thermometer in a cup of water and put the cup in the freezer, you would
find that the temperature of the water falls to 32 degrees F and then hangs there until
all of the water is completely frozen. Then the temperature of the solid water falls to
the temperature of the freezer.
What if you could somehow supercool the water? That is, say that you could get the
water's temperature to 10 degrees below the freezing point without it crystallizing into
a solid -- you can sometimes do this using a very clean glass and distilled water so
there are no points for the water to begin crystallizing. In this condition, if you tap the
glass the temperature of the water will jump up to 32 degrees F (0 degrees C), and
the water will solidify quickly.
A heat pack like the one you are describing contains sodium acetate and water. It
turns out that sodium acetate is very good at supercooling. It "freezes" at 130 degrees
F (54 degrees C), but it is happy to exist as a liquid at a much lower temperature and
is extremely stable. Clicking the disk, however, has the ability to force a few molecules
to flip to the solid state, and the rest of the liquid then rushes to solidify as well. The
temperature of the solidifying liquid jumps up to 130 degrees F in the process.
When you boil the solid, you melt it back to the liquid state. You have to completely
melt every crystal, by the way, or the liquid will quickly re-solidify. You can repeat this
cycle forever, theoretically, just as you can freeze and melt water as many times as
you like.
crystallization process, and you can see the crystallization proceed through the liquid.
What is happening here is strange, but the process can be understood if you think
about water freezing. Water freezes at 32 degrees Fahrenheit (0 degrees C). If you
were to stick a thermometer in a cup of water and put the cup in the freezer, you would
find that the temperature of the water falls to 32 degrees F and then hangs there until
all of the water is completely frozen. Then the temperature of the solid water falls to
the temperature of the freezer.
What if you could somehow supercool the water? That is, say that you could get the
water's temperature to 10 degrees below the freezing point without it crystallizing into
a solid -- you can sometimes do this using a very clean glass and distilled water so
there are no points for the water to begin crystallizing. In this condition, if you tap the
glass the temperature of the water will jump up to 32 degrees F (0 degrees C), and
the water will solidify quickly.
A heat pack like the one you are describing contains sodium acetate and water. It
turns out that sodium acetate is very good at supercooling. It "freezes" at 130 degrees
F (54 degrees C), but it is happy to exist as a liquid at a much lower temperature and
is extremely stable. Clicking the disk, however, has the ability to force a few molecules
to flip to the solid state, and the rest of the liquid then rushes to solidify as well. The
temperature of the solidifying liquid jumps up to 130 degrees F in the process.
When you boil the solid, you melt it back to the liquid state. You have to completely
melt every crystal, by the way, or the liquid will quickly re-solidify. You can repeat this
cycle forever, theoretically, just as you can freeze and melt water as many times as
you like.
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