Plastic bag
From Wikipedia, the free encyclopedia
A plastic bag or pouch is a type of flexible packaging made of thin, flexible, plastic film. Plastic bags are used for containing and transporting foods, produce, powders, ice, chemicals, waste, etc.
Most are heat sealed together. Some are bonded with adhesives or are stitched. A press-to-close zipper can be used to open and close the bag many times.
Contents |
[edit] Bag types
[edit] Packages
Bags or pouches are a type of packaging for containing frozen food, fresh produce, snack foods, hardware, gardening products, etc. They are often made from a single roll of film on a horizontal or vertical form fill sealing machine.
Several design options and features are available. Some bags have gussets to allow a higher volume of contents. Some have the ability to stand up on a shelf or a refrigerator. Some have easy-opening or reclosable options. Handles are cut into or added onto some.
Bag-In-Box packaging is often used for liquids such as wine and institutional sizes of other liquids.
Plastic bags usually use less material than comparable boxes, cartons, or jars, thus are often considered as "reduced or minimized packaging"[1] . Depending on the construction, plastic bags can be well suited for plastic recycling. They can be incinerated in appropriate facilities for waste-to-energy conversion. They are stable and benign in sanitary landfills.[2] If disposed of improperly, however, plastic bags can create unsightly litter and harm some types of wildlife. [3]
Bags are also made with carrying handles, hanging holes, tape attachments, security features, etc. Some bags have provisions for easy opening and re-closing. Some bags are sealed and can only be opened by destroying the packaging, providing some tamper-evident capability.
Bags can be made with a variety of plastic films. Polyethylene, of various grades and types, is the most common. Other forms, including laminates and coextrusions can be used when the physical properties are needed.
[edit] Plastic shopping bags
Open bags with carrying handles are used in large numbers worldwide. Stores often provide them as a convenience to shoppers. Some stores charge a nominal fee for a bag.
Heavy duty multiple-use shopping bags are often considered environmentally better than single-use paper or plastic shopping bags[by whom?].
[edit] Trash bags or Bin bags
[edit] Flexible intermediate bulk container
Flexible Intermediate Bulk Containers (Big bags, bulk bags, etc.) are large industrial containers, usually used for powders or flowables.
[edit] Danger to children
Thin plastic bags, especially dry cleaning bags, have the potential for causing suffocation. About 25 children in the United States suffocate each year due to plastic bags, most under the age of one. This has led to voluntary warning labels on some bags which may pose a hazard when placed on a baby bed.[4]
[edit] See also
- Bag-In-Box
- Bioplastic
- Biodegradable polythene film
- Biodegradation
- Box wine
- Litter
- Milk bag
- Photodegradation
- Plastic recycling
- Refuse-derived fuel
- Trash bag
- Ziploc
- Zipper storage bag
[edit] Notes
- ^ Franklin (April), Life Cycle Inventory of Packaging Options for Shipment of Retail Mail-Order Soft Goods, http://www.deq.state.or.us/lq/pubs/docs/sw/packaging/LifeCycleInventory.pdf, retrieved on December 15, 2008
- ^ Slate Explainer, 27 June 2007.
- ^ FCUSA Commentary, Plastic Bags on Our Backs, May 2008.
- ^ Consumer Product Safety Commission
[edit] References
- Brody, A. L., and Marsh, K, S., "Encyclopedia of Packaging Technology", John Wiley & Sons, 1997, ISBN 0-471-06397-5
- Soroka, W, "Fundamentals of Packaging Technology", IoPP, 2002, ISBN 1-930268-25-4
- Selke, S, "Packaging and the Environment", 1994, ISBN 1566761042
