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Composite baseball bat
Composite baseball bats, opposed to aluminum or wood baseball bats, incorporate a reinforced carbon fiber polymer, or composite, into the bat's construction. This composite material can make up all or part of the bat. Bats made entirely of this polymer are referred to as composite bats. Bats which only incorporate a portion of polymer (and the rest either wood or an aluminum alloy) are referred to as composite hybrid bats. These composite material provides an advantage over aluminum alloys and wood in durability, weight distribution, improved trampoline effect, and a higher damping rate (to reduce hand sting).
Composite bats can also be constructed to improve their trampoline effect over time. That advantage, namely the improved trampoline effect over a break in period, put the use of composite bats under further NCAA scrutiny during the 2009 NCAA Division I Baseball Tournament. Composite bats, tested after they were already broke in, showed performance standards well beyond the accepted ball exit speed ratio (BESR) Test.〔"(NCAA Baseball Rules Committee proposes moratorium on composite bats. )" National Collegiate Athletic Association. October 15, 2009.〕
As a result, a new standard, known as the batted-ball coefficient of restitution (BBCOR), was put in place in 2011 which required an accelerated break in period and testing to measure the trampoline effect of composite bats.〔"(NCAA Standard for Testing Baseball Bat Performance. )"National Collegiate Athletic Association. May 21, 2009.〕 Since the new restrictions on composite baseball bats NCAA hitting production has been noticeably dampened.〔"(Are BBCOR Standards Ruining College Baseball? )" Just Bat Reviews. October 10th, 2014.〕
==History==
Composite bats have been around as early as the 1980s for use in slow-pitch softball. Most notably, Louisville Slugger developed a slow-pitch bat that was awarded best performance at the 2001 Bat Wars. Miken responded in 2002 by developing their own composite softball bat.〔"(Are Composite Bats better than Aluminum Bats? )" Russell, Daniel A. Kettering University. October 11, 2009.〕 Even though composite material has only been historically used in slow-pitch and softball, this technology has emerged in little league, high school and collegiate baseball as early as 2000.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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