000000

Harry Potter

professor McGonagall you wrinkly betch

I will destroy your insides

My Turf Hommie

I have an obsession for NIAMH

Shrek Says 'Get on In THERE'

Good Evening, First Years. I am now an [Admin]. Beware of the 1st floor... unless you want to experience a most painful, sexual death. There are nobgoblins, nobjockeys, nobdemons and even teletubbies.

It's *hooligan* you idiot.

Heil comma!

I was talking to my good friend Billy Armstrong when suddenly I was interrupted by the mysterious number, 000000. Any help on this matter would be highly appreciated. Thank You.

guys please stop with the spam, I created this forum for adults not little kids............also I die in the next season of the walking dead

yeah you want to put a big juicy donk on it

Timothy, you total tampon. You can't even spell your own name. HEIL COMMA

rick, no one likes you. You self obsessed cat

It's *actually* and it's 'actually' spelled like *definitely*

Heil comma!

Hey, yohan. Can I AXE you a question? Hahaha, such great banter.

Lewis David Evans. Jacob Ashley Burke

It is spelled *Mitchell*..... 2 freaking l's you noob
I would know ;)

Heil grammar!

Self-heating can

From Wikipedia, the free encyclopedia

Jump to: navigation, search






Structure of a self heating can
A Self-heating can is an enhancement of the common food can. Self-heating cans have dual chambers, one surrounding the other.

In one version, the inner chamber holds the food or drink, and the outer chamber houses chemicals that undergo an exothermic reaction when combined. When the user wants to heat the contents of the can, a ring on the can when pulled breaks the barrier that keeps apart the chemicals in the outer chamber from the water. In another type, the chemicals are in the inner chamber and the beverage surrounds it in the outer chamber. To heat the contents of the can, the user pushes on the bottom of the can to break the barrier separating the chemical from the water. This design has the advantages of being more efficient (less heat is lost to the surrounding air) as well as reducing excessive heating of the product's exterior, causing possible discomfort to the user. In either case, after the heat from the reaction has been absorbed by the food, the user can enjoy a hot meal or drink.

Self-heating cans offer benefits to campers and people without access to a microwave oven, stove or camp-fire, but the technology is not yet common. This is because self-heating cans are considerably more expensive than the conventional type, they have problems with uneven heating of their contents, and the heater takes up considerable package space.



Contents  [hide]
1 Technology
2 See also
3 References 3.1 Books, general references

4 External links


Technology[edit]

The source of the heat for the self-heated can is an exothermic reaction that the user initiates by pressing on the bottom of the can. The can is manufactured as three containers. A container for the beverage surrounds a container of the heating agent separated from a container of water by a thin breakable membrane. When the user pushes on the bottom of the can, a rod pierces the membrane, allowing the water and heating agent to mix. The resulting reaction releases heat thus warms the beverage surrounding it.[1]

The heating agent and responsible reaction vary from product to product. Calcium oxide is used in the following reaction:
CaO(s)+ H2O(l) → Ca(OH)2(s)
Copper sulfate and powdered zinc can also be used, but this process is less efficient:
CuSO4(s) + Zn(s) → ZnSO4(s) + Cu(s)
Anhydrous calcium chloride is often used as well. In this case, no chemical reaction occurs, instead the heat of solution is generated.

A typical self-heating can consists of 2 chambers and a lid: 1 for solid component; 1 for liquid. When you pierce the lid, the liquid component mixes with the solid one and starts an exothermic chemical reaction. The most common chemicals for the self heating can are Al + Mg + Zn or CaO (solid component), and HCl or H2O as liquid.

See also[edit]
Flameless ration heater
Beverage can
Self-heating food packaging

References[edit]

1.Jump up ^ Container with integral module for heating or cooling the contents - Patent 5461867

Books, general references[edit]
Yam, K.L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, ISBN 978-0-470-08704-6

External links[edit]
An article on the concept
Single-serving coffee can heats itself
Will Self-Heating Coffee Be Cool?
BBC News Online - Hot drink can tested in Midlands
An article with photos on disassembly



[hide]
v ·
t ·
e
 

Packaging



General topics

Active packaging ·
Child-resistant packaging ·
Food packaging ·
Package pilferage ·
Package testing ·
Packaging engineering ·
Pharmaceutical packaging ·
Reusable packaging ·
Shelf life ·
Tamper-evident ·
Tamper resistance ·
Wrap rage
 


Containers

Aerosol spray ·
Aluminium bottle ·
Aluminum can ·
Ampoule ·
Antistatic bag ·
Bag-in-box ·
Barrel ·
Biodegradable bag ·
Blister pack ·
Bottle ·
Box ·
Bulk box ·
Carboy ·
Carton ·
Chub ·
Clamshell ·
Corrugated box design ·
Crate ·
Drum ·
Envelope ·
Flexible intermediate bulk container ·
Foam food container ·
Folding carton ·
Insulated shipping container ·
Intermediate bulk container ·
Jar ·
Juicebox ·
Keg ·
Multi-pack ·
Padded mailer ·
Pail ·
Paper bag ·
Paper sack ·
Plastic bag ·
Plastic bottle ·
Popcorn bag ·
Retort pouch ·
Sachet ·
Self-heating can ·
Self-heating food packaging ·
Shipping container ·
Skin pack ·
Spray bottle ·
Tin can ·
Tube ·
Unit load ·
Wooden box
 


Materials and
components

Adhesive ·
Aluminium foil ·
BoPET ·
Bubble wrap ·
Cellophane ·
Closure ·
Coated paper ·
Corrugated fiberboard ·
Corrugated plastic ·
Cushioning ·
Desiccant ·
Foam peanut ·
Glass ·
Hot-melt adhesive ·
Label ·
Linear low-density polyethylene ·
Liquid packaging board ·
Low-density polyethylene ·
Metallised film ·
Modified atmosphere ·
Molded pulp ·
Nonwoven fabric ·
Overwrap ·
Oxygen scavenger ·
Packaging gas ·
Pallet ·
Paper ·
Paper pallet ·
Paperboard ·
Plastic film ·
Plastic pallet ·
Plastic wrap ·
Polyester ·
Polyethylene ·
Polypropylene ·
Pressure-sensitive tape ·
Screw cap ·
Screw cap (wine) ·
Security printing ·
Security seal ·
Shock and vibration data logger ·
Shrink wrap ·
Slip sheet ·
Strapping ·
Stretch wrap ·
Susceptor ·
Temperature data logger ·
Time temperature indicator ·
Tinplate ·
Velostat
 


Processes

Aseptic processing ·
Authentication ·
Automatic identification and data capture ·
Blow fill seal ·
Blow molding ·
Calendering ·
Canning ·
Containerization ·
Curtain Coating ·
Die cutting ·
Electronic article surveillance ·
Extrusion ·
Extrusion coating ·
Graphic design ·
HACCP ·
Hermetic seal ·
Induction sealing ·
Injection molding ·
Laminating ·
Laser cutting ·
Molding ·
Papermaking ·
Plastic welding ·
Plastics extrusion ·
Printing ·
Quality assurance ·
Radio-frequency identification ·
Roll slitting ·
Shearing (manufacturing) ·
Track and trace ·
Vacuum forming ·
Ultrasonic welding ·
Vacuum packaging ·
Verification and validation
 


Machinery

Barcode printer ·
Barcode reader ·
Bottling line ·
Can seamer ·
Cartoning machine ·
Check weigher ·
Conveyor system ·
Extended core stretch wrapper ·
Filler ·
Heat gun ·
Heat sealer ·
Industrial robot ·
Injection molding machine ·
Label printer applicator ·
Lineshaft roller conveyor ·
Logistics automation ·
Material handling equipment ·
Mechanical brake stretch wrapper ·
Multihead weigher ·
Orbital stretch wrapping ·
Palletizer ·
Rotary wheel blow molding systems ·
Shrink tunnel ·
Staple gun ·
Tape dispenser ·
Turntable stretch wrapper ·
Vertical form fill sealing machine
 


Environment,
post-use

Biodegradation ·
Environmental engineering ·
Glass recycling ·
Industrial ecology ·
Life-cycle assessment ·
Litter ·
Paper recycling ·
Plastic recycling ·
Recycling ·
Reusable packaging ·
Source reduction ·
Sustainable packaging ·
Waste management
 

 



Categories: Canned food
Food storage containers
Serving and dining



Navigation menu




Create account
Log in




Article


Talk











Read


Edit


View history











    







Main page
Contents
Featured content
Current events
Random article
Donate to Wikipedia
Wikimedia Shop


Interaction

Help
About Wikipedia
Community portal
Recent changes
Contact page


Tools

What links here
Related changes
Upload file
Special pages
Permanent link
Page information
Wikidata item
Cite this page


Print/export

Create a book
Download as PDF
Printable version


Languages

Deutsch

Edit links

This page was last modified on 8 September 2014 at 19:12.

Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Privacy policy
About Wikipedia
Disclaimers
Contact Wikipedia
Developers
Mobile view

Self-heating can

From Wikipedia, the free encyclopedia

Jump to: navigation, search






Structure of a self heating can
A Self-heating can is an enhancement of the common food can. Self-heating cans have dual chambers, one surrounding the other.

In one version, the inner chamber holds the food or drink, and the outer chamber houses chemicals that undergo an exothermic reaction when combined. When the user wants to heat the contents of the can, a ring on the can when pulled breaks the barrier that keeps apart the chemicals in the outer chamber from the water. In another type, the chemicals are in the inner chamber and the beverage surrounds it in the outer chamber. To heat the contents of the can, the user pushes on the bottom of the can to break the barrier separating the chemical from the water. This design has the advantages of being more efficient (less heat is lost to the surrounding air) as well as reducing excessive heating of the product's exterior, causing possible discomfort to the user. In either case, after the heat from the reaction has been absorbed by the food, the user can enjoy a hot meal or drink.

Self-heating cans offer benefits to campers and people without access to a microwave oven, stove or camp-fire, but the technology is not yet common. This is because self-heating cans are considerably more expensive than the conventional type, they have problems with uneven heating of their contents, and the heater takes up considerable package space.



Contents  [hide]
1 Technology
2 See also
3 References 3.1 Books, general references

4 External links


Technology[edit]

The source of the heat for the self-heated can is an exothermic reaction that the user initiates by pressing on the bottom of the can. The can is manufactured as three containers. A container for the beverage surrounds a container of the heating agent separated from a container of water by a thin breakable membrane. When the user pushes on the bottom of the can, a rod pierces the membrane, allowing the water and heating agent to mix. The resulting reaction releases heat thus warms the beverage surrounding it.[1]

The heating agent and responsible reaction vary from product to product. Calcium oxide is used in the following reaction:
CaO(s)+ H2O(l) → Ca(OH)2(s)
Copper sulfate and powdered zinc can also be used, but this process is less efficient:
CuSO4(s) + Zn(s) → ZnSO4(s) + Cu(s)
Anhydrous calcium chloride is often used as well. In this case, no chemical reaction occurs, instead the heat of solution is generated.

A typical self-heating can consists of 2 chambers and a lid: 1 for solid component; 1 for liquid. When you pierce the lid, the liquid component mixes with the solid one and starts an exothermic chemical reaction. The most common chemicals for the self heating can are Al + Mg + Zn or CaO (solid component), and HCl or H2O as liquid.

See also[edit]
Flameless ration heater
Beverage can
Self-heating food packaging

References[edit]

1.Jump up ^ Container with integral module for heating or cooling the contents - Patent 5461867

Books, general references[edit]
Yam, K.L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, ISBN 978-0-470-08704-6

External links[edit]
An article on the concept
Single-serving coffee can heats itself
Will Self-Heating Coffee Be Cool?
BBC News Online - Hot drink can tested in Midlands
An article with photos on disassembly



[hide]
v ·
t ·
e
 

Packaging



General topics

Active packaging ·
Child-resistant packaging ·
Food packaging ·
Package pilferage ·
Package testing ·
Packaging engineering ·
Pharmaceutical packaging ·
Reusable packaging ·
Shelf life ·
Tamper-evident ·
Tamper resistance ·
Wrap rage
 


Containers

Aerosol spray ·
Aluminium bottle ·
Aluminum can ·
Ampoule ·
Antistatic bag ·
Bag-in-box ·
Barrel ·
Biodegradable bag ·
Blister pack ·
Bottle ·
Box ·
Bulk box ·
Carboy ·
Carton ·
Chub ·
Clamshell ·
Corrugated box design ·
Crate ·
Drum ·
Envelope ·
Flexible intermediate bulk container ·
Foam food container ·
Folding carton ·
Insulated shipping container ·
Intermediate bulk container ·
Jar ·
Juicebox ·
Keg ·
Multi-pack ·
Padded mailer ·
Pail ·
Paper bag ·
Paper sack ·
Plastic bag ·
Plastic bottle ·
Popcorn bag ·
Retort pouch ·
Sachet ·
Self-heating can ·
Self-heating food packaging ·
Shipping container ·
Skin pack ·
Spray bottle ·
Tin can ·
Tube ·
Unit load ·
Wooden box
 


Materials and
components

Adhesive ·
Aluminium foil ·
BoPET ·
Bubble wrap ·
Cellophane ·
Closure ·
Coated paper ·
Corrugated fiberboard ·
Corrugated plastic ·
Cushioning ·
Desiccant ·
Foam peanut ·
Glass ·
Hot-melt adhesive ·
Label ·
Linear low-density polyethylene ·
Liquid packaging board ·
Low-density polyethylene ·
Metallised film ·
Modified atmosphere ·
Molded pulp ·
Nonwoven fabric ·
Overwrap ·
Oxygen scavenger ·
Packaging gas ·
Pallet ·
Paper ·
Paper pallet ·
Paperboard ·
Plastic film ·
Plastic pallet ·
Plastic wrap ·
Polyester ·
Polyethylene ·
Polypropylene ·
Pressure-sensitive tape ·
Screw cap ·
Screw cap (wine) ·
Security printing ·
Security seal ·
Shock and vibration data logger ·
Shrink wrap ·
Slip sheet ·
Strapping ·
Stretch wrap ·
Susceptor ·
Temperature data logger ·
Time temperature indicator ·
Tinplate ·
Velostat
 


Processes

Aseptic processing ·
Authentication ·
Automatic identification and data capture ·
Blow fill seal ·
Blow molding ·
Calendering ·
Canning ·
Containerization ·
Curtain Coating ·
Die cutting ·
Electronic article surveillance ·
Extrusion ·
Extrusion coating ·
Graphic design ·
HACCP ·
Hermetic seal ·
Induction sealing ·
Injection molding ·
Laminating ·
Laser cutting ·
Molding ·
Papermaking ·
Plastic welding ·
Plastics extrusion ·
Printing ·
Quality assurance ·
Radio-frequency identification ·
Roll slitting ·
Shearing (manufacturing) ·
Track and trace ·
Vacuum forming ·
Ultrasonic welding ·
Vacuum packaging ·
Verification and validation
 


Machinery

Barcode printer ·
Barcode reader ·
Bottling line ·
Can seamer ·
Cartoning machine ·
Check weigher ·
Conveyor system ·
Extended core stretch wrapper ·
Filler ·
Heat gun ·
Heat sealer ·
Industrial robot ·
Injection molding machine ·
Label printer applicator ·
Lineshaft roller conveyor ·
Logistics automation ·
Material handling equipment ·
Mechanical brake stretch wrapper ·
Multihead weigher ·
Orbital stretch wrapping ·
Palletizer ·
Rotary wheel blow molding systems ·
Shrink tunnel ·
Staple gun ·
Tape dispenser ·
Turntable stretch wrapper ·
Vertical form fill sealing machine
 


Environment,
post-use

Biodegradation ·
Environmental engineering ·
Glass recycling ·
Industrial ecology ·
Life-cycle assessment ·
Litter ·
Paper recycling ·
Plastic recycling ·
Recycling ·
Reusable packaging ·
Source reduction ·
Sustainable packaging ·
Waste management
 

 



Categories: Canned food
Food storage containers
Serving and dining



Navigation menu




Create account
Log in




Article


Talk











Read


Edit


View history











    







Main page
Contents
Featured content
Current events
Random article
Donate to Wikipedia
Wikimedia Shop


Interaction

Help
About Wikipedia
Community portal
Recent changes
Contact page


Tools

What links here
Related changes
Upload file
Special pages
Permanent link
Page information
Wikidata item
Cite this page


Print/export

Create a book
Download as PDF
Printable version


Languages

Deutsch

Edit links

This page was last modified on 8 September 2014 at 19:12.

Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Privacy policy
About Wikipedia
Disclaimers
Contact Wikipedia
Developers
Mobile view

Self-heating can

From Wikipedia, the free encyclopedia

Jump to: navigation, search






Structure of a self heating can
A Self-heating can is an enhancement of the common food can. Self-heating cans have dual chambers, one surrounding the other.

In one version, the inner chamber holds the food or drink, and the outer chamber houses chemicals that undergo an exothermic reaction when combined. When the user wants to heat the contents of the can, a ring on the can when pulled breaks the barrier that keeps apart the chemicals in the outer chamber from the water. In another type, the chemicals are in the inner chamber and the beverage surrounds it in the outer chamber. To heat the contents of the can, the user pushes on the bottom of the can to break the barrier separating the chemical from the water. This design has the advantages of being more efficient (less heat is lost to the surrounding air) as well as reducing excessive heating of the product's exterior, causing possible discomfort to the user. In either case, after the heat from the reaction has been absorbed by the food, the user can enjoy a hot meal or drink.

Self-heating cans offer benefits to campers and people without access to a microwave oven, stove or camp-fire, but the technology is not yet common. This is because self-heating cans are considerably more expensive than the conventional type, they have problems with uneven heating of their contents, and the heater takes up considerable package space.



Contents  [hide]
1 Technology
2 See also
3 References 3.1 Books, general references

4 External links


Technology[edit]

The source of the heat for the self-heated can is an exothermic reaction that the user initiates by pressing on the bottom of the can. The can is manufactured as three containers. A container for the beverage surrounds a container of the heating agent separated from a container of water by a thin breakable membrane. When the user pushes on the bottom of the can, a rod pierces the membrane, allowing the water and heating agent to mix. The resulting reaction releases heat thus warms the beverage surrounding it.[1]

The heating agent and responsible reaction vary from product to product. Calcium oxide is used in the following reaction:
CaO(s)+ H2O(l) → Ca(OH)2(s)
Copper sulfate and powdered zinc can also be used, but this process is less efficient:
CuSO4(s) + Zn(s) → ZnSO4(s) + Cu(s)
Anhydrous calcium chloride is often used as well. In this case, no chemical reaction occurs, instead the heat of solution is generated.

A typical self-heating can consists of 2 chambers and a lid: 1 for solid component; 1 for liquid. When you pierce the lid, the liquid component mixes with the solid one and starts an exothermic chemical reaction. The most common chemicals for the self heating can are Al + Mg + Zn or CaO (solid component), and HCl or H2O as liquid.

See also[edit]
Flameless ration heater
Beverage can
Self-heating food packaging

References[edit]

1.Jump up ^ Container with integral module for heating or cooling the contents - Patent 5461867

Books, general references[edit]
Yam, K.L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, ISBN 978-0-470-08704-6

External links[edit]
An article on the concept
Single-serving coffee can heats itself
Will Self-Heating Coffee Be Cool?
BBC News Online - Hot drink can tested in Midlands
An article with photos on disassembly



[hide]
v ·
t ·
e
 

Packaging



General topics

Active packaging ·
Child-resistant packaging ·
Food packaging ·
Package pilferage ·
Package testing ·
Packaging engineering ·
Pharmaceutical packaging ·
Reusable packaging ·
Shelf life ·
Tamper-evident ·
Tamper resistance ·
Wrap rage
 


Containers

Aerosol spray ·
Aluminium bottle ·
Aluminum can ·
Ampoule ·
Antistatic bag ·
Bag-in-box ·
Barrel ·
Biodegradable bag ·
Blister pack ·
Bottle ·
Box ·
Bulk box ·
Carboy ·
Carton ·
Chub ·
Clamshell ·
Corrugated box design ·
Crate ·
Drum ·
Envelope ·
Flexible intermediate bulk container ·
Foam food container ·
Folding carton ·
Insulated shipping container ·
Intermediate bulk container ·
Jar ·
Juicebox ·
Keg ·
Multi-pack ·
Padded mailer ·
Pail ·
Paper bag ·
Paper sack ·
Plastic bag ·
Plastic bottle ·
Popcorn bag ·
Retort pouch ·
Sachet ·
Self-heating can ·
Self-heating food packaging ·
Shipping container ·
Skin pack ·
Spray bottle ·
Tin can ·
Tube ·
Unit load ·
Wooden box
 


Materials and
components

Adhesive ·
Aluminium foil ·
BoPET ·
Bubble wrap ·
Cellophane ·
Closure ·
Coated paper ·
Corrugated fiberboard ·
Corrugated plastic ·
Cushioning ·
Desiccant ·
Foam peanut ·
Glass ·
Hot-melt adhesive ·
Label ·
Linear low-density polyethylene ·
Liquid packaging board ·
Low-density polyethylene ·
Metallised film ·
Modified atmosphere ·
Molded pulp ·
Nonwoven fabric ·
Overwrap ·
Oxygen scavenger ·
Packaging gas ·
Pallet ·
Paper ·
Paper pallet ·
Paperboard ·
Plastic film ·
Plastic pallet ·
Plastic wrap ·
Polyester ·
Polyethylene ·
Polypropylene ·
Pressure-sensitive tape ·
Screw cap ·
Screw cap (wine) ·
Security printing ·
Security seal ·
Shock and vibration data logger ·
Shrink wrap ·
Slip sheet ·
Strapping ·
Stretch wrap ·
Susceptor ·
Temperature data logger ·
Time temperature indicator ·
Tinplate ·
Velostat
 


Processes

Aseptic processing ·
Authentication ·
Automatic identification and data capture ·
Blow fill seal ·
Blow molding ·
Calendering ·
Canning ·
Containerization ·
Curtain Coating ·
Die cutting ·
Electronic article surveillance ·
Extrusion ·
Extrusion coating ·
Graphic design ·
HACCP ·
Hermetic seal ·
Induction sealing ·
Injection molding ·
Laminating ·
Laser cutting ·
Molding ·
Papermaking ·
Plastic welding ·
Plastics extrusion ·
Printing ·
Quality assurance ·
Radio-frequency identification ·
Roll slitting ·
Shearing (manufacturing) ·
Track and trace ·
Vacuum forming ·
Ultrasonic welding ·
Vacuum packaging ·
Verification and validation
 


Machinery

Barcode printer ·
Barcode reader ·
Bottling line ·
Can seamer ·
Cartoning machine ·
Check weigher ·
Conveyor system ·
Extended core stretch wrapper ·
Filler ·
Heat gun ·
Heat sealer ·
Industrial robot ·
Injection molding machine ·
Label printer applicator ·
Lineshaft roller conveyor ·
Logistics automation ·
Material handling equipment ·
Mechanical brake stretch wrapper ·
Multihead weigher ·
Orbital stretch wrapping ·
Palletizer ·
Rotary wheel blow molding systems ·
Shrink tunnel ·
Staple gun ·
Tape dispenser ·
Turntable stretch wrapper ·
Vertical form fill sealing machine
 


Environment,
post-use

Biodegradation ·
Environmental engineering ·
Glass recycling ·
Industrial ecology ·
Life-cycle assessment ·
Litter ·
Paper recycling ·
Plastic recycling ·
Recycling ·
Reusable packaging ·
Source reduction ·
Sustainable packaging ·
Waste management
 

 



Categories: Canned food
Food storage containers
Serving and dining



Navigation menu




Create account
Log in




Article


Talk











Read


Edit


View history











    







Main page
Contents
Featured content
Current events
Random article
Donate to Wikipedia
Wikimedia Shop


Interaction

Help
About Wikipedia
Community portal
Recent changes
Contact page


Tools

What links here
Related changes
Upload file
Special pages
Permanent link
Page information
Wikidata item
Cite this page


Print/export

Create a book
Download as PDF
Printable version


Languages

Deutsch

Edit links

This page was last modified on 8 September 2014 at 19:12.

Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Privacy policy
About Wikipedia
Disclaimers
Contact Wikipedia
Developers
Mobile view


Self-heating can

From Wikipedia, the free encyclopedia

Jump to: navigation, search






Structure of a self heating can
A Self-heating can is an enhancement of the common food can. Self-heating cans have dual chambers, one surrounding the other.

In one version, the inner chamber holds the food or drink, and the outer chamber houses chemicals that undergo an exothermic reaction when combined. When the user wants to heat the contents of the can, a ring on the can when pulled breaks the barrier that keeps apart the chemicals in the outer chamber from the water. In another type, the chemicals are in the inner chamber and the beverage surrounds it in the outer chamber. To heat the contents of the can, the user pushes on the bottom of the can to break the barrier separating the chemical from the water. This design has the advantages of being more efficient (less heat is lost to the surrounding air) as well as reducing excessive heating of the product's exterior, causing possible discomfort to the user. In either case, after the heat from the reaction has been absorbed by the food, the user can enjoy a hot meal or drink.

Self-heating cans offer benefits to campers and people without access to a microwave oven, stove or camp-fire, but the technology is not yet common. This is because self-heating cans are considerably more expensive than the conventional type, they have problems with uneven heating of their contents, and the heater takes up considerable package space.



Contents  [hide]
1 Technology
2 See also
3 References 3.1 Books, general references

4 External links


Technology[edit]

The source of the heat for the self-heated can is an exothermic reaction that the user initiates by pressing on the bottom of the can. The can is manufactured as three containers. A container for the beverage surrounds a container of the heating agent separated from a container of water by a thin breakable membrane. When the user pushes on the bottom of the can, a rod pierces the membrane, allowing the water and heating agent to mix. The resulting reaction releases heat thus warms the beverage surrounding it.[1]

The heating agent and responsible reaction vary from product to product. Calcium oxide is used in the following reaction:
CaO(s)+ H2O(l) → Ca(OH)2(s)
Copper sulfate and powdered zinc can also be used, but this process is less efficient:
CuSO4(s) + Zn(s) → ZnSO4(s) + Cu(s)
Anhydrous calcium chloride is often used as well. In this case, no chemical reaction occurs, instead the heat of solution is generated.

A typical self-heating can consists of 2 chambers and a lid: 1 for solid component; 1 for liquid. When you pierce the lid, the liquid component mixes with the solid one and starts an exothermic chemical reaction. The most common chemicals for the self heating can are Al + Mg + Zn or CaO (solid component), and HCl or H2O as liquid.

See also[edit]
Flameless ration heater
Beverage can
Self-heating food packaging

References[edit]

1.Jump up ^ Container with integral module for heating or cooling the contents - Patent 5461867

Books, general references[edit]
Yam, K.L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, ISBN 978-0-470-08704-6

External links[edit]
An article on the concept
Single-serving coffee can heats itself
Will Self-Heating Coffee Be Cool?
BBC News Online - Hot drink can tested in Midlands
An article with photos on disassembly



[hide]
v ·
t ·
e
 

Packaging



General topics

Active packaging ·
Child-resistant packaging ·
Food packaging ·
Package pilferage ·
Package testing ·
Packaging engineering ·
Pharmaceutical packaging ·
Reusable packaging ·
Shelf life ·
Tamper-evident ·
Tamper resistance ·
Wrap rage
 


Containers

Aerosol spray ·
Aluminium bottle ·
Aluminum can ·
Ampoule ·
Antistatic bag ·
Bag-in-box ·
Barrel ·
Biodegradable bag ·
Blister pack ·
Bottle ·
Box ·
Bulk box ·
Carboy ·
Carton ·
Chub ·
Clamshell ·
Corrugated box design ·
Crate ·
Drum ·
Envelope ·
Flexible intermediate bulk container ·
Foam food container ·
Folding carton ·
Insulated shipping container ·
Intermediate bulk container ·
Jar ·
Juicebox ·
Keg ·
Multi-pack ·
Padded mailer ·
Pail ·
Paper bag ·
Paper sack ·
Plastic bag ·
Plastic bottle ·
Popcorn bag ·
Retort pouch ·
Sachet ·
Self-heating can ·
Self-heating food packaging ·
Shipping container ·
Skin pack ·
Spray bottle ·
Tin can ·
Tube ·
Unit load ·
Wooden box
 


Materials and
components

Adhesive ·
Aluminium foil ·
BoPET ·
Bubble wrap ·
Cellophane ·
Closure ·
Coated paper ·
Corrugated fiberboard ·
Corrugated plastic ·
Cushioning ·
Desiccant ·
Foam peanut ·
Glass ·
Hot-melt adhesive ·
Label ·
Linear low-density polyethylene ·
Liquid packaging board ·
Low-density polyethylene ·
Metallised film ·
Modified atmosphere ·
Molded pulp ·
Nonwoven fabric ·
Overwrap ·
Oxygen scavenger ·
Packaging gas ·
Pallet ·
Paper ·
Paper pallet ·
Paperboard ·
Plastic film ·
Plastic pallet ·
Plastic wrap ·
Polyester ·
Polyethylene ·
Polypropylene ·
Pressure-sensitive tape ·
Screw cap ·
Screw cap (wine) ·
Security printing ·
Security seal ·
Shock and vibration data logger ·
Shrink wrap ·
Slip sheet ·
Strapping ·
Stretch wrap ·
Susceptor ·
Temperature data logger ·
Time temperature indicator ·
Tinplate ·
Velostat
 


Processes

Aseptic processing ·
Authentication ·
Automatic identification and data capture ·
Blow fill seal ·
Blow molding ·
Calendering ·
Canning ·
Containerization ·
Curtain Coating ·
Die cutting ·
Electronic article surveillance ·
Extrusion ·
Extrusion coating ·
Graphic design ·
HACCP ·
Hermetic seal ·
Induction sealing ·
Injection molding ·
Laminating ·
Laser cutting ·
Molding ·
Papermaking ·
Plastic welding ·
Plastics extrusion ·
Printing ·
Quality assurance ·
Radio-frequency identification ·
Roll slitting ·
Shearing (manufacturing) ·
Track and trace ·
Vacuum forming ·
Ultrasonic welding ·
Vacuum packaging ·
Verification and validation
 


Machinery

Barcode printer ·
Barcode reader ·
Bottling line ·
Can seamer ·
Cartoning machine ·
Check weigher ·
Conveyor system ·
Extended core stretch wrapper ·
Filler ·
Heat gun ·
Heat sealer ·
Industrial robot ·
Injection molding machine ·
Label printer applicator ·
Lineshaft roller conveyor ·
Logistics automation ·
Material handling equipment ·
Mechanical brake stretch wrapper ·
Multihead weigher ·
Orbital stretch wrapping ·
Palletizer ·
Rotary wheel blow molding systems ·
Shrink tunnel ·
Staple gun ·
Tape dispenser ·
Turntable stretch wrapper ·
Vertical form fill sealing machine
 


Environment,
post-use

Biodegradation ·
Environmental engineering ·
Glass recycling ·
Industrial ecology ·
Life-cycle assessment ·
Litter ·
Paper recycling ·
Plastic recycling ·
Recycling ·
Reusable packaging ·
Source reduction ·
Sustainable packaging ·
Waste management
 

 



Categories: Canned food
Food storage containers
Serving and dining



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This page was last modified on 8 September 2014 at 19:12.

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