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-{{About|a type of packaging|the short film|Plastic Bag (film)|the song|Plastic Bag (Drake and Future song)}}
-{{Use dmy dates|date=June 2017}}
-[[File:Trash bin in Paris.jpg|thumb|A plastic bag used to collect waste on a street in Paris.]]
-A '''plastic bag''', '''polybag''',  or '''pouch''' is a type of container made of thin, flexible, [[plastic film]], [[nonwoven fabric]], or plastic [[textile]]. Plastic bags are used for containing and transporting goods such as foods, produce, [[Powder (substance)|powder]]s, ice, [[magazine]]s, [[chemical]]s, and [[waste]]. It is a common form of [[packaging]].
-Most plastic bags are [[Heat sealer#Heat sealing process|heat sealed]] together. Some are bonded with adhesives or are stitched.
-== Packages ==
-[[File:Handle in plastic bag.jpg|225px|thumb||Plastic bag of water softener salt; [[Package handle|handle]] die-cut through the thick plastic to allow carrying]]
-Several design options and features are available. Some bags have [[gusset]]s to allow a higher volume of contents, some have the ability to stand up on a shelf or a refrigerator, and some have easy-opening or reclosable options. Handles are cut into or added into some.
-Bags can be made with a variety of plastics films. [[Polyethylene]] ([[LDPE]], [[LLDPE]], etc.) is the most common. Other forms, including laminates and co-extrusions can be used when the physical properties are needed.
-Plastic bags usually use less material than comparable to boxes, cartons, or jars, thus are often considered as "reduced or minimized packaging".<ref>{{Cite web | title = Life Cycle Inventory of Packaging Options for Shipment of Retail Mail-Order Soft Goods | date = April 2004 | url = http://www.deq.state.or.us/lq/pubs/docs/sw/packaging/LifeCycleInventory.pdf | accessdate = 15 December 2008 | deadurl = yes | archiveurl = https://web.archive.org/web/20081217063517/http://www.deq.state.or.us/lq/pubs/docs/sw/packaging/LifeCycleInventory.pdf | archivedate = 17 December 2008 | df = dmy-all }} In June 2009 Germany’s Institute for Energy and Environmental Research concluded that oil-based plastics, especially if recycled, have a better [[life-cycle analysis]] than [[compostable plastics]].  They added that "The current bags made from [[bioplastic]]s have less favourable environmental impact profiles than the other materials examined" and that this is due to the process of raw-material production.</ref>
-Depending on the construction, plastic bags can be suited for [[plastic recycling]]. They can be incinerated in appropriate facilities for [[waste-to-energy]] conversion. They are stable and benign in sanitary [[landfill]]s.<ref>{{cite web|last=Lapidos |first=Juliet |url=http://www.slate.com/id/2169287/nav/navoa/ |title=Slate Explainer, 27 June 2007 |publisher=Slate.com |date=27 June 2007 |accessdate=7 July 2010}}</ref> If disposed of improperly, however, plastic bags can create unsightly [[litter]] and harm some types of [[wildlife]].<ref>{{cite web|url=http://www.maninnature.com/FCUSA/resource/perspect999ce.htm |title=Teresa Platt Commentary, Plastic Bags on Our Backs, May 2008 |publisher=teresaplatt.com |date= |accessdate=7 July 2010}}</ref><ref>{{cite web |url=http://www.salon.com/2007/08/10/plastic_bags/ |title=Plastic bags are killing us |last1=Mieszkowski |first1=Katharine |date=10 August 2007 |work= |publisher=Salon.com |accessdate=23 April 2013}}</ref>
-Bags are also made with carrying handles, hanging holes, tape attachments, or security features.  Some bags have provisions for easy and controlled opening. Reclosable features, including press-to-seal zipper strips, are common for kitchen bags bought empty and for some foods. Some bags are sealed for [[tamper-evident]] capability, including some where the press-to-reseal feature becomes accessible only when a perforated outer seal is torn away.
-[[Boil-in-Bag|Boil-in-bags]] are often used for sealed frozen foods, sometimes complete entrees.  The bags are usually tough heat-sealed nylon or polyester to withstand the temperatures of boiling water.  Some bags are porous or perforated to allow the hot water to contact the food: rice, noodles, etc.
-[[Bag-in-box]] packaging is often used for liquids such as [[box wine]] and institutional sizes of other liquids.
-== Medical uses ==
-Plastic bags are used for many medical purposes.  The non-porous quality of plastic film means that they are useful for isolating infectious body fluids; other porous bags made of [[nonwoven]] plastics can be sterilized by gas and maintain this sterility. Bags can be made under regulated sterile manufacturing conditions, so they can be used when infection is a health risk.  They are lightweight and flexible, so they can be carried by or laid next to patients without making the patient as uncomfortable as a heavy glass bottle would be.  They are less expensive than re-usable options, such as glass bottles.  Plastic bags and plastic wrap are also used to prevent water loss and hypothermia in very premature babies.<ref>{{Cite journal|title = Interventions to prevent hypothermia at birth in preterm and/or low birthweight infants|journal = The Cochrane Database of Systematic Reviews|date = 2010|pmid = 20238329|pages = CD004210|issue = 3|doi = 10.1002/14651858.CD004210.pub4|first = Emma M.|last = McCall|first2 = Fiona|last2 = Alderdice|first3 = Henry L.|last3 = Halliday|first4 = John G.|last4 = Jenkins|first5 = Sunita|last5 = Vohra}}</ref>
-== Waste disposal bags ==
-{{main|Bin bag}}
-== Flexible intermediate bulk container ==
-{{main|Flexible intermediate bulk container}}
-Flexible intermediate bulk containers are large industrial containers, usually used for powders or flowables.
-== Plastic shopping bags ==
-{{main|Plastic shopping bag}}
-Open bags with carrying handles are used in large numbers. Stores often provide them as a convenience to shoppers. Some stores charge a nominal fee for a bag.
-Heavy-duty [[reusable shopping bag]]s are often considered environmentally better than single-use [[paper]] or [[plastic shopping bag]]s.  Because of environmental and litter problems, some locations are working toward a [[phase-out of lightweight plastic bags]].
-=== History ===
-American and European patent applications relating to the production of plastic shopping bags can be found dating back to the early 1950s, but these refer to composite constructions with handles fixed to the bag in a secondary manufacturing process. The modern lightweight shopping bag is the invention of [[Sweden|Swedish]] engineer Sten Gustaf Thulin.<ref name="European Plastics News'''">[http://www.europeanplasticsnews.com/subscriber/newscat2.html?cat=&channel=500&id=1222446525 European Plastics News: Plastic T-Shirt Carrier Bag (1965)]. 26 September 2008. Retrieved 17 April 2012.</ref> In the early 1960s, Thulin developed a method of forming a simple one-piece bag by folding, welding and [[Shearing (manufacturing)|die-cutting]] a flat tube of plastic for the packaging company Celloplast of [[Norrköping]], Sweden. Thulin's design produced a simple, strong bag with a high load-carrying capacity, and was patented worldwide by Celloplast in 1965.
-From the mid-1980s onwards, plastic bags became common for carrying daily groceries from the store to vehicles and homes throughout the developed world. As plastic bags increasingly replaced paper bags, and as other plastic materials and products replaced glass, metal, stone, timber and other materials, a packaging materials war erupted, with plastic shopping bags at the center of highly publicized disputes.
-In 1992, [[Sonoco|Sonoco Products Company]] of [[Hartsville, South Carolina|Hartsville, SC]] patented<ref>{{Citation|last=Beasley|first=M. Wayne|title=Self-opening polyethylene bag stack and process for producing same|date=9 August 1994|url=http://www.google.com/patents/US5335788|last2=Fletcher|last3=Jr|first2=Wade D.|first3=Harry B. Wilfong|accessdate=10 September 2016}}</ref> the "self-opening polyethylene bag stack". The main innovation of this redesign is that the removal of a bag from the rack opens the next bag in the stack. This team was headed by [[Wade D Fletcher]] and [[Harry Wilfong]].
-=== International usage ===
-The number of plastic bags used and discarded worldwide has been estimated to be on the order of 1 trillion annually.<ref>{{Cite web|url=http://www.cleanup.org.au/au/Campaigns/plastic-bag-facts.html|title=Plastic as a Resource|last=|first=|date=|website=Clean Up Australia|access-date=6 June 2017}}</ref> The use of plastic bags differs dramatically across countries. While the average consumer in China uses only 2 or 3 plastic bags a year, the numbers are much higher in most other countries: Denmark: 4, Ireland: 20,<ref>{{Cite web|url=http://www.takepart.com/article/2010/11/30/half-sacked-chinese-plastic-bag-use-drops-50-percent|title=Half Sacked: Chinese Plastic Bag Use Drops by 50 Percent|last=Cardoni|first=Salvatore|date=30 November 2010|website=Take Part|access-date=6 June 2017}}</ref> Germany: 65, USA: > 300, Poland, Hungary, Slovakia: more than 400.{{citation needed|date=February 2015}}
-A large number of cities and counties have banned the use of plastic bags by grocery stores or introduced a minimum charge. In September 2014, [[California]] became the first state to pass a law banning their use. Local manufacturers of plastic bags, under the legislation, would receive financial support to assist them make more durable multi-use bags, that would be sold by grocery stores rather than given away, as were the plastic bags.
-In India, government has banned use of plastic bags below 50 [[micron]]s.<ref>{{Cite news|url=http://timesofindia.com/home/environment/pollution/centre-bans-plastic-bags-below-50-microns/articleshow/51455974.cms|title=Centre bans plastic bags below 50 microns - Times of India|newspaper=The Times of India|access-date=22 January 2017}}</ref>
-=== Environmental issues ===
-{{main| Biodegradable bag}}
-{{main |Phase-out of lightweight plastic bags}}
-Non-compostable plastic bags can take up to 1000 years to [[Chemical decomposition|decompose]]. Plastic bags are not capable of biodegradation but rather they photodegrade, a process by which the plastic bags are broken down into smaller toxic parts. In the 2000s, many stores and companies began to use different types of [[biodegradable bag]]s to comply with perceived environmental benefits.<ref name= "fest">{{cite journal|author=Wilder, Sam|title=Festival food recycling: Sun, fun and diversion|journal=BioCycle |volume=47|issue=6 |date=June 2006|pages=30|url=http://www.biocycle.net/2006/06/26/sun-fun-and-diversion/}}</ref><ref>"The supermarket chain [[Aldi Süd]] of Germany is now offering its customers shopping bags made of [[BASF]]'s biodegradable plastic ecovio®. (Industry News and Notes, brief article)." Plastics Engineering 65.6 (June 2009): 54(2)</ref>
-[[Plastic shopping bag]]s escape the garbage collection process, and are also disposed of improperly and can end up in streams, which then lead them to end up in the open ocean. To mitigate marine plastic pollution from single-use shopping bags, many jurisdictions around the world have implemented bans or fees on the use of plastic bags.<ref>Xanthos, D., Walker, T. R. (2017). International policies to reduce plastic marine pollution from single-use plastics (plastic bags and microbeads): a review. Marine Pollution Bulletin, 118(1-2), 17-26.</ref> They can also affect urban environments. Waterways and drains can be clogged by plastic bags and have been linked to severe flooding. An estimated 300 million plastic bags end up in the Atlantic Ocean alone, due to escaping the garbage.<ref name=":0">{{Cite web|url=http://www.healthguidance.org/entry/14901/1/The-Effects-of-Plastic-Bags-on-the-Environment.html|title=The Effects of Plastic Bags on the Environment|last=Wagner |first=Jamey |date=|website=Health Guidance. ''healthguidance.org''|access-date=19 March 2018}}</ref> The way in which the bags float in open water can resemble a [[jellyfish]], posing significant dangers to marine mammals and [[Leatherback sea turtle]]s, when they are eaten by mistake and enter the animals' digestive tracts.<ref name="pmid24886170">{{cite journal |vauthors=Schuyler QA, Wilcox C, Townsend K, Hardesty BD, Marshall NJ |title=Mistaken identity? Visual similarities of marine debris to natural prey items of sea turtles |journal=BMC Ecol. |volume=14 |issue= |pages=14 |year=2014 |pmid=24886170 |pmc=4032385 |doi=10.1186/1472-6785-14-14 |url=}}</ref> After ingestion, the plastic material can lead to premature death. Once death occurs and the animal body decomposes, the plastic reenters the environment, posing more potential problems. <ref name=":0" />
-Marine animals are not the only animals affected by improper plastic bag disposal. Penguins can get trapped and suffocate because of the bags. Plastic bags can also be mistaken for materials used in a bird's nest, which could lead to accidental ingestion of the plastic. Additionally, sea birds, when hunting, sense for dimethyl sulfide (DMS) which is produced by algae. Plastic bags are a breeding ground for algae, so the sea birds mistakenly eat the bag rather than the fish that typically ingests algae. (National Geographic)<ref>{{Cite news|url=https://news.nationalgeographic.com/2016/11/animals-eat-ocean-plastic-because-of-smell-dms-algae-seabirds-fish/|title=Animals Eat Ocean Plastic Because it Smells Like Food|date=2016-11-09|access-date=2018-02-15}}</ref>
-Even though the bags are plastic, most recycling plants do not recycle them. The type of plastic{{clarify|date=February 2018}} in plastic bags makes it difficult to be recycled into new material. Additionally, the material frequently causes the equipment used at recycling plants to jam, thus having to pause the recycle machinery and slow down daily operations{{citation needed|date=April 2017}}.
-{{further|Plastic waste|Great Pacific garbage patch|Marine debris}}
-== Danger to children ==
-Thin conformable 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, almost nine out of ten of whom are under the age of one.<ref>[https://web.archive.org/web/20000816170724/http://www.cpsc.gov/cpscpub/pubs/5064.pdf Children Still Suffocating with Plastic Bags]. [[U.S. Consumer Product Safety Commission]]</ref> This has led to voluntary warning labels on some bags which pose a hazard to small children.<ref>{{cite web |url=http://www.cpsc.gov/CPSCPUB/PUBS/5064.html |title=Consumer Product Safety Commission |publisher=Cpsc.gov |date= |accessdate=7 July 2010 |deadurl=yes |archiveurl=https://web.archive.org/web/20100714144032/http://www.cpsc.gov/cpscpub/pubs/5064.html |archivedate=14 July 2010 |df=dmy-all }}</ref>
-== Uses ==
-Plastic bags are used for diverse applications:
-<center>
-<gallery>
-File:Wasabi-Chips (Migros).JPG|Snack chips
-File:Gardening bags.jpg|Gardening supplies
-File:Bagging vegetables.jpg|Bagging vegetables
-File:Platelet blood bag.jpg|blood platelets
-Image:Bladder pack.JPG|inner bladder for [[bag-in-box]]
-File:1pastry bag.jpg|Pastry bag with [[Zipper storage bag|convenience closure]]
-File:Ileostomy with bag.jpg|[[Ostomy bag]]
-File:Biohazard waste bag.jpg|Biohazard bag
-File:Garbage bag Basel Bebbisagg.JPG|[[Bin bag]] or trash bag
-File:String bag.jpg|[[String bag]] made of plastic fibers
-File:Tpn 3bag.jpg|Multiple chambers for eventual mixing
-File:Kochbeutel 1.JPG|Porous bag for cooking rice
-Image:Infuuszakjes.jpg|Intravenous therapy
-File:Mobiles.JPG|[[Tamper evident]] evidence bag
-File:My gels and liquids (max 100ml) in a regulation plastic bag (1355852892).jpg|Travel toiletries in a reclosable plastic bag
-File:FEMA - 40341 - Children helping with sand bags in Fargo, North Dakota.jpg|Woven plastic fiber bags used for sand
-File:Nonwoven geotextile containers.jpg|Nonwoven plastic, [[geotextile]] bags
-Image:Body bag.jpg|A plastic [[body bag]]
-</gallery>
-</center>
-== See also ==
-* [[Biodegradable polythene film]]
-* [[Biodegradation]]
-* [[Bioplastic]]
-* [[Box wine]]
-* [[Milk bag]]
-* [[Photodegradation]]
-* [[Refuse-derived fuel]]
-* [[Zipper storage bag]]
-* [[Bag It (film)]]
-== References ==
-{{reflist|30em}}
-== Further reading ==
-{{commons category|Plastic bags}}
-* Yam, K. L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, {{ISBN|978-0-470-08704-6}}
-* Selke, S, "Packaging and the Environment", 1994, {{ISBN|1-56676-104-2}}
-* Soroka, W, "Fundamentals of Packaging Technology", IoPP, 2002, {{ISBN|1-930268-25-4}}
-==External link==
-*[https://www.youtube.com/watch?v=8CfL5xl2N1Q How Its Made: Plastic bags]
-{{packaging}}
-{{bags}}
-{{plastics}}
-{{Authority control}}
-[[Category:Bags]]
-[[Category:Containers]]
-[[Category:Packaging]]
-[[Category:Mass production]]
-[[Category:Plastics applications]]