Ball (association football)

A football, soccer ball, football ball, or association football ball is the ball used in the sport of association football. The name of the ball varies according to whether the sport is called "football", "soccer", or "association football". The ball's spherical shape, as well as its size, weight, and material composition, are specified by Law 2 of the Laws of the Game maintained by the International Football Association Board. Additional, more stringent standards are specified by FIFA and subordinate governing bodies for the balls used in the competitions they sanction.

Adidas Telstar-style ball, with the familiar black and white spherical truncated icosahedron pattern, introduced in 1970

Early footballs began as animal bladders or stomachs that would easily fall apart if kicked too much. Improvements became possible in the 19th century with the introduction of rubber and discoveries of vulcanization by Charles Goodyear. The modern 32-panel ball design was developed in 1962 by Eigil Nielsen, and technological research continues today to develop footballs with improved performance. The 32-panel ball design was soon overcome by 24-panel balls as well as 42-panel balls, both of which improved performance compared to before, in 2007.

A black-and-white patterned spherical truncated icosahedron design, brought to prominence by the Adidas Telstar, has become an icon of the sport.[1] Many different designs of balls exist, varying both in appearance and physical characteristics.[2]

History

First years of football codes
Early football ball (with its leather lace) used in the 1930 FIFA World Cup Final
Leather ball used in the football tournament at the 1936 Summer Olympics

In the year 1863, the first specifications for footballs were laid down by the Football Association. Previous to this, footballs were made out of inflated animal bladder, with later leather coverings to help footballs maintain their shapes.[3] In 1872 the specifications were revised, and these rules have been left essentially unchanged as defined by the International Football Association Board. Differences in footballs created since this rule came into effect have been to do with the material used in their creation.

Footballs have gone through a dramatic change over time. During medieval times balls were normally made from an outer shell of leather filled with cork shavings.[4] Another method of creating a ball was using animal bladders for the inside of the ball making it inflatable. However, these two styles of creating footballs made it easy for the ball to puncture and were inadequate for kicking. It was not until the 19th century that footballs developed into what a football looks like today.

Vulcanisation

In 1838, Charles Goodyear introduced vulcanized rubber, which dramatically improved the football.[5] Vulcanisation is the treatment of rubber to give it certain qualities such as strength, elasticity, and resistance to solvents. Vulcanisation of rubber also helps the football resist moderate heat and cold. Vulcanisation helped create inflatable bladders that pressurize the outer panel arrangement of the football. Charles Goodyear's innovation increased the bounce ability of the ball and made it easier to kick. Most balls of this time had tanned leather with eighteen sections stitched together. These were arranged in six panels of three strips each.[6][7]

Reasons for improvement

During the 1900s, footballs were made out of leather with a lace of the same material (known as tiento in Spanish) used to stitch the panels. Although leather was perfect for bouncing and kicking the ball, when heading the football (hitting it with the player's head) it was usually painful. This problem was most probably due to water absorption of the leather from rain, which caused a considerable increase in weight, causing head or neck injury. By around 2017, this had also been associated with dementia in former players.[8] Another problem of early footballs was that they deteriorated quickly, as the leather used in manufacturing the footballs varied in thickness and in quality.[6]

The ball without the leather lace was developed and patented by Romano Polo, Antonio Tossolini and Juan Valbonesi in 1931 in Bell Ville, Córdoba Province, Argentina.[9][10] This innovative ball (named Superball) was adopted by the Argentine Football Association as the official ball for its competitions since 1932.[11]

Present developments
Adidas Torfabrik football used in the Bundesliga in 2011

Elements of the football that today are tested are the deformation of the football when it is kicked or when the ball hits a surface. Two styles of footballs have been tested by the Sports Technology Research Group of Wolfson School of Mechanical and Manufacturing Engineering in Loughborough University; these two models are called the Basic FE model and the Developed FE model of the football. The basic model considered the ball as being a spherical shell with isotropic material properties. The developed model also utilised isotropic material properties but included an additional stiffer stitching seam region.

Manufacturers are experimenting with microchips and even cameras embedded inside the ball. The microchip technology was considered for the goal-line technology. The 2018 World Cup in Russia ball had an embedded chip which did not provide any measurements, but provided 'user experience' by interaction on user smartphone after connecting with the ball via NFC connection. Since 2017 American football league is already using chips in their balls that measure live speed and flight data.[12][13][14]

Future developments

Companies such as Umbro, Mitre, Adidas, Nike, Select and Puma are releasing footballs made out of new materials which are intended to provide more accurate flight and more power to be transferred to the football.[15][16]

Specification

Construction

Today's footballs are much more complex than past footballs. Most modern footballs consist of twelve regular pentagonal and twenty regular hexagonal panels positioned in a truncated icosahedron spherical geometry.[4] Some premium-grade 32-panel balls use non-regular polygons to give a closer approximation to sphericality.[17] The inside of the football is made up of a latex or butyl rubber bladder which enables the football to be pressurised. The ball's outside is made of leather, synthetic leather, polyurethane or PVC panels. The surface can be textured, weaved or embossed for greater control and touch. The panel pairs are either machine-stitched, hand-stitched or thermo-bonded (glued and bonded by heat) along the edge.[5] To prevent water absorption balls may be specially coated, or the stitches bonded with glue. The size of a football is roughly 22 cm (8.66 inches) in diameter for a regulation size 5 ball. Rules state that a size 5 ball must be 68 to 70 cm (27 to 28 in) in circumference.[18] Averaging that to 69 cm (27 in) and then dividing by π gives about 22 cm (8.7 in) for a diameter.

Size and weight

Regulation size and weight for a soccer ball is a circumference of 68–70 cm (27–28 in) and a weight of between 410–450 g (14–16 oz). The ball should be inflated to a pressure of 0.6 and 1.1 bars (8.7 and 16.0 psi) at sea level.[19] This is known as "Size 5". Smaller balls, sizes 1, 3 and 4 are also produced. These are designed for younger players or as training tools.[19]

Types of ball

There are a number of different types of football balls depending on the match and turf including training footballs, match footballs, professional match footballs, beach footballs, street footballs, indoor footballs, turf balls, futsal footballs and mini/skills footballs.[20]

A professional/premium match soccer ball.
  • Professional/Premium Match Soccer Balls are developed with top professional clubs to maximize players natural abilities and skills. They are FIFA-approved for use at the highest professional and international levels and designed for performance, exact specifications, great accuracy, speed and control. Air retention, water-resistance, and performance are far superior when compared to a training ball. Intended for all natural and artificial turf surfaces and all climates. These are the most expensive soccer balls.
  • Matchday Soccer Balls are high performance range of balls for all playing surfaces. The outer casing is either leather or an approved synthetic and it will typically be water-resistant as well. They are guaranteed to conform to official size, weight, and texture regulations, designed to suit all levels of play and all age groups. These balls cost more than turf or training balls, which is offset by their superior level of quality.
  • Recreational/Practice/Training Soccer Balls are tough and highly durable balls for extended use. Made of robust materials for use on all playing surfaces and used by players at any level. Practice balls are the least expensive balls when compared with match type soccer balls.
  • Turf Balls are specifically designed to work on artificial surfaces that mimic grass. They are durable and reasonably affordable, but tend to skip more when used on a natural pitch.
  • Promotional Balls are usually made to promote a name brand, organization or event.
  • Indoor Soccer Balls come in the same sizes as the outdoor soccer balls, but are designed to have less bounce and rebound in them, making it possible to control the ball on a smaller court or indoor arena. The cover of an indoor ball is also the strongest of any category, so it can withstand the hard rebound impact on the court flooring and wall surfaces.
  • Futsal Soccer Balls differ from typical soccer balls in that the bladder is filled with foam. That makes the ball heavier and with less bounce for use on the hard futsal playing surface. Besides that, a futsal soccer ball is smaller in size than a football used in the soccer field.

Suppliers
See also: List of FIFA World Cup official match balls, List of UEFA European Championship official match balls, List of AFC Asian Cup official match balls, and List of Olympic Football official match balls

Many companies throughout the world produce footballs. The earliest balls were made by local suppliers where the game was played. It is estimated that 55% of all footballs are made in Sialkot, Pakistan, with other major producers being China and India.[21]

As a response to the problems with the balls in the 1962 FIFA World Cup, Adidas created the Adidas Santiago[22] – this led to Adidas winning the contract to supply the match balls for all official FIFA and UEFA matches, which they have held since the 1970s, and also for the Olympic Games.[23] They also supply the ball for the UEFA Champions League which is called the Adidas Finale.

FIFA World Cup
Main article: FIFA World Cup official match balls

In early FIFA World Cups, match balls were mostly provided by the hosts from local suppliers. Records indicate a variety of models being used within individual tournaments and even, on some occasions, individual games. Over time, FIFA took more control over the choice of ball used. Since 1970 Adidas have supplied official match balls for every tournament.[24]

League balls

The following lists the most up-to-date balls used in various club football competitions:

Unicode

The association football symbol (U+26BD ⚽ SOCCER BALL (HTML ⚽)) was introduced by computing standard Unicode.[27] The symbol was representable in HTML as ⚽ or ⚽. The addition of this symbol follows a 2008 proposal by Karl Pentzlin.[28]

See also

References
  1. Kotschick, Dieter (2006). "The Topology and Combinatorics of Soccer Balls". American Scientist. 94 (4): 350–357. doi:10.1511/2006.60.1001.
  2. Hong, Sungchan; Asai, Takeshi (29 May 2014). "Effect of panel shape of soccer ball on its flight characteristics". Scientific Reports. 4 (1): 5068. doi:10.1038/srep05068. PMC 4038026. PMID 24875291.
  3. football World – Early History Archived 16 June 2006 at the Wayback Machine (Accessed 9 June 2006)
  4. Price, D. S., Jones, R.Harland, A. R. 2006. Computational modeling of manually stitched footballs. Proceedings of the Institution of Mechanical Engineers – Part L — Journal of Materials: Design & Applications. Vol. 220 Issue 4, p259-268.
  5. Materials Science and Engineering: A Volume 420, Issues 1–2, 25 March 2006, Pages 100–108
  6. Viscoelasticity of multi-layer textile reinforced polymer composites used in footballs. Journal of Materials Science. Volume 43, Number 8 / April 2008. 2833–2843.
  7. "Oldest Soccer Ball". soccerballworld.com. 2013. Archived from the original on 30 August 2017. Retrieved 16 August 2013.
  8. Ling, Helen; Morris, Huw R.; Neal, James W.; Lees, Andrew J.; Hardy, John; Holton, Janice L.; Revesz, Tamas; Williams, David D. R. (March 2017). "Mixed pathologies including chronic traumatic encephalopathy account for dementia in retired association football (soccer) players" (PDF). Acta Neuropathologica. 133 (3): 337–352. doi:10.1007/s00401-017-1680-3. PMC 5325836. PMID 28205009. Retrieved 29 September 2019.
  9. "La primera fábrica argentina de pelotas". iProfesional (in Spanish). Emprendimientos Corporativos S.A. 18 July 2018. Archived from the original on 18 April 2019. Retrieved 29 September 2019.
  10. Wall, Alejandro (July 2013). "Los avances tecnológicos en el fútbol". Conexión Brando (in Spanish). Archived from the original on 22 June 2013. Retrieved 29 September 2019.
  11. "Pelota sin tientos". La Nueva Provincia (in Spanish). 5 February 2012. Archived from the original on 11 April 2019. Retrieved 29 September 2019.
  12. https://www.nytimes.com/2017/12/18/sports/nfl-first-down-measurement.html
  13. https://www.latimes.com/sports/soccer/la-sp-world-cup-ball-20180521-story.html
  14. https://www.soccerbible.com/performance/football-equipment/2017/how-does-the-2018-adidas-telstar-nfc-ball-work/
  15. "The History of the Soccer Ball Part 2". Soccer Football World. Rig-Tech Inc. 9 June 2006. Archived from the original on 19 June 2010. Retrieved 29 September 2019.
  16. "World's First Intelligent Soccer Ball Receives FIFA Recognition". Cision. PR Newswire. 6 July 2012. Archived from the original on 23 July 2015. Retrieved 21 July 2015.
  17. Eastaway, Rob; Haigh, John (15 October 2005). "Balls; and why theyaren't quite spherical". How to Take a Penalty: The Hidden Mathematics of Sport. Robson. pp. 4–5. ISBN 9781861058362.
  18. "IFAB".
  19. "Laws of the Game 2017/2018" (PDF). Archived (PDF) from the original on 13 November 2017. Retrieved 12 November 2017.
  20. Soccer Balls Archived 20 September 2013 at the Wayback Machine, Soccer , 2013-10-14. Retrieved 2013-10-14.
  21. wright, tom (28 April 2010). "A Soccer Sore Point". The Wall Street Journal. Archived from the original on 10 August 2014. Retrieved 28 June 2014.
  22. The Blizzard: Issue 6. 2012. ISBN 978-1-908940-06-3. Archived from the original on 27 August 2012.
  23. football World – Team Geist Archived 15 July 2010 at the Wayback Machine (Accessed 9 June 2006)
  24. Platt, Oli. "FIFA World Cup balls: From the Tango to the Jabulani | Goal.com". goal.com. Archived from the original on 25 June 2018. Retrieved 25 June 2018.
  25. "DERBYSTAR unveils 2019/20 Bundesliga match ball". Bundesliga.com. DFL Deutsche Fußball Liga GmbH. 19 May 2019. Archived from the original on 3 September 2019. Retrieved 29 September 2019.
  26. "PUMA Announce Official Match Ball Deal With La Liga". Soccerbible. 15 April 2019. Archived from the original on 3 September 2019. Retrieved 29 September 2019.
  27. "Miscellaneous Symbols Range: 2600–26FF, The Unicode Standard, Version 12.0" (PDF). Unicode Consortium. 2009. Archived (PDF) from the original on 19 September 2011. Retrieved 14 March 2010.
  28. Pentzlin, Karl (2 April 2008). "Proposal to encode a SOCCER BALL symbol in Unicode" (PDF). Retrieved 14 March 2010.
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