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The materials used to make basketballs and footballs have changed over time, but the main designs of the balls have stayed largely the same. Basketballs are made from a variety of materials, including leather, synthetic rubber, and regular rubber. Footballs are made from either cowhide or vulcanized rubber, and are then encased in a leather shell.
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What You'll Learn
Footballs: Cowhide leather or vulcanized rubber
Footballs are made from cowhide leather or vulcanized rubber. The Horween Leather Company, one of the oldest leather tanneries in the US, supplies leather to Wilson Sporting Goods in Ada, Ohio, for the production of NFL footballs. The company receives 3,000 cowhides per week, which undergo a rigorous three-week process of hair removal, tanning, and drying. The leather is then stamped with a 1,000-ton press to create the distinct pebbling found on footballs and basketballs.
During the manufacturing process, the hides are laid out and cut into oval shapes. They are lined with rubber and cotton to maintain their shape and then sewn together to create an inside-out football. The balls are then steamed and stretched, turned outside-in, stuffed with bladders, and sewn up. Before the invention of vulcanized rubber in 1844, footballs used pig bladders for their cores.
The leather used in footballs is also used in the production of basketballs. Basketballs are made of leather, composite leather, or rubber, depending on their intended use. Indoor basketballs, which tend to be more expensive, are typically made of leather or absorbent composites, while outdoor balls are made of rubber to withstand harsher conditions.
Professional basketballs, such as those used in the NBA, are made of real leather, specifically Chromexcel leather from the Horween Leather Company. Recreational basketballs, on the other hand, often feature synthetic leather covers, such as polyurethane leather, which provides durability, weather resistance, and better grip for outdoor use.
The process of making basketballs involves cutting and sewing the finished hides into panels, wrapping them around a spherical "bladder" made of vulcanized rubber, and covering them with nylon thread. The bladder is essential for holding air and providing bounce to the ball.
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Footballs: Synthetic rubber bladders and leather casings
Footballs are made from a variety of materials, including synthetic rubber bladders and leather casings. The Horween Leather Company supplies leather to Wilson Sporting Goods in Ada, Ohio, for the production of footballs. The leather hides are cut into oval shapes and lined with rubber and cotton to maintain their shape. The panels are sewn together to create an inside-out football, which is then steamed and stretched. The ball is then turned outside-in, and the bladder is inserted before the final sewing.
The use of synthetic rubber bladders in footballs provides durability and shape retention. Synthetic rubber is made from natural rubber or a combination of synthetic polymers, offering improved performance and longevity. The bladders are crucial for maintaining air pressure and ensuring consistent performance during gameplay.
Leather casings, on the other hand, provide a combination of durability, grip, and texture. The leather panels are glued or stitched together to form the outer casing of the football. Leather is known for its suppleness and ability to withstand the impact of kicking and ground control.
The choice of materials for footballs is carefully considered to meet the specific demands of the sport. The ball needs to withstand precise control on the ground and kicking impact. The synthetic rubber bladder and leather casing work together to provide optimal performance, ensuring the ball retains its shape and air pressure while offering a suitable grip and feel for players.
Additionally, the manufacturing process of footballs is designed to meet the standards of professional leagues and ensure consistent quality. The Horween Leather Company, for example, follows a rigorous process of hair removal, tanning, and drying to prepare the leather for football production. This attention to detail in both materials and construction ensures that footballs perform as expected and meet the requirements of the sport.
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Basketballs: Butyl rubber, nylon thread and leather
Basketballs are made of several components, each of which has specific mechanical properties that contribute to the ball's performance.
The inner bladder of a basketball is made of butyl rubber, the same material used in bike inner tubes. Butyl rubber is a synthetic material with properties similar to natural rubber. It is highly resistant to abrasion, tearing, and flexing, and has a low gas permeability due to its high density and low molecular movement. This makes it ideal for holding air and maintaining suitable air pressure, especially in outdoor balls that need to withstand rougher conditions and colder weather.
The butyl rubber bladder is then wrapped in nylon thread, specifically nylon 6,6, a type of polyamide with high tensile strength and the ability to form into a fibre. Thousands of metres of this nylon thread are wound around the bladder to create stability and a more perfect sphere, enhancing the ball's bounce and durability.
Finally, the bladder wrapped in nylon thread is encased in a sleeve or panels of leather. Genuine cow leather is used in official WNBA and NBA balls, providing wear resistance and improving grip and control. The leather also offers shock absorption, protecting the player's hands from the force transferred when the ball bounces back.
The precise combination of butyl rubber, nylon thread, and leather gives basketballs their unique properties, allowing them to be light, round, elastic, durable, and suitable for dribbling, shooting, and bouncing during gameplay.
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Basketballs: Indoor balls are made of leather
Basketballs are spherical and larger and heavier than footballs. The official size for men's basketball is size 7, with a circumference of 75-76 cm (29.5-30 inches). Women's basketballs are slightly smaller, typically size 6. A standard basketball weighs about 600-650 grams (21-23 ounces).
Basketballs are made from leather, composite leather, or rubber. Professional basketballs are made with real leather, while recreational balls have synthetic leather covers. Synthetic leather balls are more durable and provide additional resistance to weather and sunlight.
Indoor basketballs are generally made of leather or absorbent composites, while all-surface basketballs are made of rubber or durable composites. Indoor balls are more expensive than all-surface balls due to the cost of materials.
The leather used for basketballs can be traced back to the United States and is produced in Chicago by the Horween Leather Company. The Horween Leather Company is one of the oldest leather tanneries in the U.S. and supplies leather for both NBA basketballs and NFL footballs. The leather goes through a rigorous three-week process of hair removal, tanning, and drying. The finished hides are then sent to China for cutting and sewing.
The inside of a basketball is made up of a spherical "bladder" made of vulcanized rubber that holds air. The bladder is wrapped and covered with nylon thread, then covered with six rubber panels. Those rubber panels are then covered with leather panels that are glued on by hand.
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Basketballs: Outdoor balls are made of rubber
Basketballs are spherical and larger and heavier than footballs. The official size for men's basketball is size 7, with a circumference of 75-76 cm (29.5-30 inches). Women's basketballs are slightly smaller, typically size 6. A standard basketball weighs about 600-650 grams (21-23 ounces).
Basketballs are made from leather (used in professional leagues), composite leather, or rubber (common in outdoor and youth games). The material influences the grip, feel, and durability of the ball. Indoor balls are generally made of leather or absorbent composites, while all-surface balls are made of rubber or durable composites.
Outdoor basketballs are made of rubber to cope with rougher conditions. They need to be filled with more air to retain a suitable level of air pressure in colder weather. The abrasiveness of asphalt and the dirt and moisture present in an outdoor setting will usually ruin an indoor ball within a short period.
The surface of a basketball is covered in pebbled dots, providing a textured grip. The ball features eight panels, separated by black seams, enhancing control and handling. The basketball typically consists of 8 or 14 panels, separated by cavities, which provide better handling and enhanced control.
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Frequently asked questions
Basketballs are made from a variety of materials, including leather, synthetic rubber, and regular rubber. The inner bladder of the basketball is made from butyl rubber, while the outer covering is made from leather. The leather is coloured and stamped with a unique design, then stitched together around the ball.
Footballs are made from either cowhide or vulcanized rubber. They are then covered in a leather shell. Footballs used in recreational settings or youth leagues may be made from rubber or plastic materials.
Basketballs used in the NBA have a circumference of 29.5 inches (75 cm), while those used in the WNBA have a maximum circumference of 28.5 inches (72 cm). Basketballs used in youth leagues are smaller, typically ranging from 27 to 29 inches (69-74 cm) in circumference.
